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2. error Slave 2 Error Troubleshooting code Description of error Description of diagnosis E7 01 Fan motor 1 lock Master E7 02 Fan motor 2 lock Master E7 05 Fan motor 1 instantaneous Refer to the following to make a overcurrent Master diagnosis of the fan motor of the E7 06 Fan motor 2 instantaneous elevant unit overcurrent Master E7 09 Fan motor 1 IPM error Master E7 10 Fan motor 2 IPM error Master E7 13 Fan motor 1 lock Slave 1 For fan motor lock refer to E7 14 Fan motor 2 lock Slave 1 E7 01 02 13 14 25 E7 17 Fan motor 1 instantaneous 26 overcurrent Slave 1 E7 18 Fan motor 2 instantaneous overcurrent Slave 1 E7 21 Fan motor 1 IPM error Slave 1 For instantaneous E7 22 Fan motor 2 IPM error Slave 1 overcurrent refer to E7 05 E7 25 Fan motor 1 lock Slave 2 06 17 18 29 and 30 E7 26 Fan motor 2 lock Slave 2 E7 29 Fan motor 1 instantaneous overcurrent Slave 2 59 90 Fan motor e For IPM error refer to E7 09 overcurrent Slave 2 10 21 22 33 and 34 E7 33 Fan motor 1 IPM error Slave 2 E7 34 Fan motor 2 IPM error Slave 2 E9 01 Electronic expansion valve 1 coil error Master Refer to the E9 flow chart of E9 04 Electronic expansion valve 2 coil error Master each manual and mak
3. wiring between the BS units correct Correct ine connection wiring Replace the BS gt unit PCB concerned Diagnosis Flow 8 Check 3 Check 4 9000099900090999 Is the connection wiring between the indoor unit and the BS unit correct Correct the connection wiring Replace the gt indoor unit or BS unit PCB 331 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display on Applicable Models All indoor models VRVII 11 5 WII and WIII Series Method of Error Detection Detect abnormalities in combination of indoor and outdoor outside units and the remote controller using the outdoor outside unit PCB Error Decision Conditions When any of the followings is detected failure is instantly confirmed W When there is a problem in the combination of the indoor and outdoor outside units W When there is a problem in the combination of the indoor unit and the remote controller Supposed Causes W Excess of connected indoor units W Defective outdoor outside unit PCB Mismatching of the refrigerant type of indoor and outdoor outside unit W Setting of outdoor outside unit PCB was not conducted after replacing to spare PCB 332
4. http splitoff ru tehn doc html VRV Series 997 dcr dOv d8 98 doe LA 482 d9z dvc dez doz det 991 dol 98 vaze v dos LA v dgr v dor v dor v aec v dee vare v aze v aoe v agz OAXH vagz varz v azz vaoz vasi vazi waor vag Was 929 dos aL 98 doe 492 90 38 99 dol dg dS OAXH jeeH vars vaze v dos cU vast v dor vador vase v dee vare vaze v aoe v agz vagz varz vaoz vasi vaar vazi W dO vag vias Joqus ed spun m http splitoff ru tehn doc html VRV Series 2 5 VRVIII Q P Series B Outdoor Units Type Model Name Symbol 8P 10 12 14 16 18P 20P 22P 24P 26P RQYQ 28P 30P 32P 34P 36P Yi 38P 40 42P 44P 46P 48P http splitoff ru tehn doc html
5. http splitoff ru tehn doc html Symptom based Troubleshooting Symptom Supposed Cause Countermeasure 7 The system This symptom The system is Wait for a period conducts fan occurs preparation mode of approximately operation but immediately after of operation 10 minutes not cooling or turning ON the heating power supply operation 8 The airflow Evenpressing the heating operation Normal operation rate is not AIRFLOW RATE when the room reproduced SET button temperature reaches according to makes no the set degree the the setting changes in the outdoor unit will stop airflow rate while the indoor unit is brought to fan LL operation so that no one gets cold air Furthermore if fan operation mode is selected when other indoor unit is in heating operation the system will be brought to fan LL operation The fan LL operation is also enabled while in oil return mode in cooling operation 9 The The airflow Automatic control Normal operation direction is direction is not not corresponding to reproduced that displayed on according to the remote the setting controller The flap does not swing 14 http splitoff ru tehn doc html Symptom based Troubleshooting Symptom Supposed Cause Countermeasure 1
6. http splitoff ru tehn doc html 85 Troubleshooting by Indication on the Remote Controller 3 17 Thermistor for Discharge Air Abnormality Remote Controller Display Ln Applicable Models All indoor models Method of Error Detection Error detection is carried out by temperature detected by discharge air temperature thermistor Error Decision Conditions When the discharge air temperature thermistor becomes disconnected or shorted while the unit is running Supposed Causes Defective indoor unit thermistor for air outlet W Defective indoor unit PCB 86 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Connector is connected to the indoor unit PCB N E gt Connect the thermistor and turn ON again measured after disconnecting the thermistor from the indoor gt Replace the unit PCB 7 2kQ thermistor 112kQ gt Replace the indoor unit PCB NIIT TI Refer to P 369 http splitoff ru tehn doc html 87 Troubleshooting by Indication on the Remote Controller 3 18 Humidity Sensor System Abnormality
7. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged if it is the first time to start after installation NO B Check if a right NO amount of refrigerant gt Charge a right is charged amount of refrigerant Check i NO Wale oA gt Open the stop valve Refrigerant is melting in refrigerant oil The YES unit is out of power gt Cancel the supply for more melting state of than 6 hours refrigerant Check if the insulation resistance of the NO gt Cancel the compressor is more melting state of iban refrigerant 220 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check if the compressor lead YES Sidi wires are gt Fix the disconnected compressor lead wire Correct the wiring then supply power to restart 221 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Refrigerant is melting in refrigerant oil The unit is out of power supply for m
8. god LY Ayjeuuouqv e e e e uonoejoJg ov Meet ONXA ONX4 OTX4 OVX4 DHX4 WFN HOW OSX3 00 4 0 4 D3X4 OZX4 00 4 Sju8juo 10214 pas For the model names refer to 2 11 26 http splitoff ru tehn doc html Troubleshooting by Remote Controller 06 ur JojsiuJeu Ayjeuuouqv 88 Josuas 99 Ayjeuuouqy 98 10jsiuueu vo v8 gt JojsiuuJeu L 65 god pue 28 Od Hun usemjaq 95 yjeuuouqy Ayjeuuouqv 08 adi seo 20 Jorsiuueu go Ayjeuuouqv 81 edid pinbr1 20 Jojsiuueu yo god pue SZ e god usemjaq LO y euuouqy uoissiusueJ yjeuuouqy Z ia ia uoneuruJejeg Pv 74 e e e e e e e e e jur afe po Een OnX4 ONX4 07X4 OVX4 OHX4
9. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting A Caution Diagnosis Check 4 Check 3 ow 4 Isa YES Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged gt Procure the single unit installed connection wiring of multi YES correct model of unit gt Correct the outdoor units is broken or disconnected connection wirings gt Replace the outdoor unit main PCB Diagnosis Check 3 Flow 5 Check 4 900090000 90090600 Is the model BS unit connected Connect the BS unit gt Replace the outdoor unit PCB concerned 330 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged Diagnosis Flow 6 Check 3 Check 4 15 wiring between the outdoor unit and the BS unit correct Correct the wiring Replace the gt outdoor unit PCB concerned Diagnosis Flow 7 Check 3 Check 4
10. TAXA HAYA SAYA HAYA Seues VOLV H ecd 28 http splitoff ru tehn doc html Troubleshooting by Remote Controller 9 1 1ojsiuueu edid pinbiq 711 e e e e e e e ayeuuouqy Jojsiuueu JeBueuox3 uf Jooping 9f ZL e e e e e e e e e ypeuuouqy 40jsiuueu edid uonongs 011 e e yjeuuougy 10 sec JeBueuox3eaH vf 891 e e e e e e e e e yjeuuouqy Jojsiuuau eBJeuosig er 191 e e yjeuuouqy Josues uano SOL e e Kyjeuuouqy Josuas uano zr 291 e Ayjeuuouqy Josuas eJnsseJg ufiH Lr 651 e e 10113 19 Ayjeuuouqy SSL e e e Ayeuuouqy 15099 JoopinO 6H 91 e e yjeuuougy jeubis uey Jo0pino OSL e e yjeuuouqy jeubis 1040 uey pun Joopino ZH yjeuuouqy uejs s yams H Lvl e e StL e e 94 247 e e e e einjejeduie jewiouqy 24 a d N VN v N sjuejuo JOU 5 HILMCASIA AWAYA AYA
11. SHUN 10 http splitoff ru tehn doc html VRV Series 2 7 VRV WIII doe doe 40 J9 009M m _ dez doz dr 90 38 dot dor 98 Joqu AsS IPON m 3A i VINOOL VIL E LA VINOOL WALL adh pepuedsns VOS wor VWOZ ONX4 adh Buipuejs 100 4 VOS VWOP VWOZ 01X4 ed 20014 VOS VWOP VWOZ Ovx4 edA pejunow VINOOL veg 3 OHX4 adh pepuedsns VINOOC gt OWX4 ed jong Sulle dOvl 491 300 08 deg dos dor dee 92 doc OWX4 9 9 8 9 SNO 9 9 anos SNOF 3ASNOQX gt gaze 8992 8802 13A8d 0QX3 gaze 8992 8802 3A8d oaxd z VINEO Wor
12. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged outdoor outside YES PCB replaced to spare PCB 2 The refrigerant classification has not been set yet The total of indoor units displaying uA and indoor units connected to the same refrigerant system is within connectable number of unit NO gt There are too many indoor units within the same refrigerant system Press and hold the RESET button on the outside unit PCB for 5 seconds Does an error occur Normal 333 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Does the refrigerant type of NO indoor and outdoor outside unit Matches the refrigerant type of indoor and outdoor outside unit gt Replace the nm Note outdoor outside unit PCB The number of indoor units that can be connected to a single outside unit system depends on the type of outside unit 334 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 68
13. gt UP button e DOWN button 2 Number of beeps Continuous beep Both upper and lower digits matched Error code confirmed 2 short beeps Upper digit matched 1 short beep Lower digit matched 5 Press the MODE selector button The right 0 lower digit indication of the error code flashes 6 Error code lower digit diagnosis Press the UP or DOWN button and change the error code lower digit until the continuous error code matching buzzer 2 is generated E The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed Cris gt gt 2 00 or 21 Lie gt button TE DOWN button 22 http splitoff ru tehn doc html Troubleshooting by Remote Controller Normal status Enters inspection mode from normal status when the INSPECTION TEST button is pressed 1 Press INSPECTION TEST button If no button is pressed for 1 minute equipment returns to normal status 3 Press MODE When MODE selector selector button is pressed or button no button is pressed for 1 minute equipment returns to normal status If no button is pressed for 1 minute equipment returns to normal status 5 Press MODE selector button 23
14. connection status of one of of outdoor multi Check if the wiring is broken or disconnected Replace the outdoor unit main PCB gt Correct the connecting wires of the outdoor multi and then reset the power supply Diagnosis Flow 7 Check of error 3 Check of error 4 90oeeoeeoooeeoo the connection status of the outdoor multi check if more than 4 outdoor units are connected Replace the outdoor unit main PCB gt Correct the connecting wires of the outdoor multi and then reset the power supply 309 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Diagnosis Flow 8 Check of error 3 Check of error 4 G20 00000000000 connection status of the connecting wires of outdoor multi Check if the wiring has any connection error or broken or is about to be disconnected Replace the outdoor unit main PCB gt Correct the connecting wires of the outdoor multi and then reset the power supply 310 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display i Lu Applicable Models VRVII WII and WIII Series Method of Error Detection Micro computer chec
15. http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 3 Self diagnosis by Wireless Remote Controller If unit stops due to an error the operation indicating LED on the signal receiving part of indoor unit flashes The error code can be determined by following the procedure described below The error code is displayed when an operation error has occurred In normal condition the error code of the last problem is displayed 1 Press the INSPECTION TEST button to select inspection The equipment enters the inspection mode The Unit indication is displayed and the Unit No display shows flashing 0 indication 2 Set the Unit No Press the UP DOWN button and change the Unit No display until the buzzer 1 is generated from the indoor unit 1 Number of beeps 3 short beeps Conduct all of the following operations 1 short beep Conduct steps 3 and 4 Continue the operation in step 4 until a buzzer remains ON The continuous buzzer indicates that the error code is confirmed Continuous No abnormality 3 Press the MODE selector button The left 0 upper digit indication of the error code flashes 4 Error code upper digit diagnosis Press the UP or DOWN button and change the error code upper digit until the error code matching buzzer 2 is generated W The upper digit of the code changes as shown below when the UP and DOWN buttons are
16. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller n Note 1 Make measurement of resistance between the connector pins and then make sure the resistance falls in the range of 40 to 500 Orange 2 O Measuring points Judgement Yellow 3 1 6 2 6 Black 4 J 3 6 40 500 5 4 6 COM Gray 6 132 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display co Applicable Models VRVII WII WIII and 11 5 Series Method of Error Detection Check disconnection of connector Check continuity of electronic expansion valve coil Error Decision Conditions Error is generated under no common power supply when the power is ON Supposed Causes W Defective electronic expansion valve coil W Defective outside unit PCB W Defective connecting cable 133 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn power supply OFF and turn power supply ON again YES gt Ext
17. vier viec viWoe voee voe asz x fies Tes vive vowel Wet DL Nr Wer vinor waoe voe wsz 314 A LA wet JoquAs edAL m 19 105 10 wej 792 702 NX4 adh Buipueis 10015 189 105 107 wej 18 702 1X4 adh 1004 189 709 o wej 792 702 ed pejunoy 100 9 Te HX4 ed pepuedsns 1092 7002 792 1001 108 729 10S 10r Wx4 ed jong pejunoy buleo LA MSZL wool meg MOS MSc yoz SAX uonong d ung payunoyy Bulag 1921 700 108 7 9 707 wej 19 702 ed uring Buleo VME9 VMOS VMOZ GAX4 egenours pejunoyy wea wos wor wee wsz L3AW QX4 gt z weg Wos wor wee woz 99 05 13 d 0X4 7 9 dsz dOZ 159 10 wej 792 9 1 sewiog pajunoy
18. 19 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 2 2 Wired Remote Controller BRC1E61 The following will be displayed on the screen when an error or a warning occurs during operation Check the error code and take the corrective action specified for the particular model J DAIKIN Screen Operation lamp 1 Checking an error or warning Operation Status Display The operation lamp green starts to blink The message Error Abnormal The system Press Menu button shutdown stops operating will appear and blink at the bottom of the Screen Warning The system continues its operation The operation lamp green remains on The message Warning Press Menu button will appear and blink at the bottom of the screen 20 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 Taking corrective action Press the Menu Enter button to check the error code 84 Take the corrective action specific to the model Error code Al Error code Contact address 0123 456 789 Indoor Unit Outdoor Unit RWEYQTOPYI Applicable Return model names 21
19. Is the type of the fan inverter PCB correct NO gt Replace it with the correct fan inverter PCB Is the setting of dip NO switches when replace Set the DIP the main PCB switches correct correctly After setting Reset the power supply Does the preparation indication lamp H2P on the main PCB turn OFF NO Rectify the connection wiring Replace the outdoor unit main PCB 246 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display i ru Applicable Models VRVII Series Method of Error Detection The defective or no field setting after replacing main PCB or defective PCB combination is detected through communications with the inverter Error Decision Conditions Whether or not the field setting or the type of the PCB is correct through the communication date is judged Supposed Causes W Defective or no field setting after replacing main PCB Mismatching of type of PCB 247 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Has the PCB been replaced
20. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 30 Abnormal Discharge Pipe Temperature Remote Controller Display eo Applicable Models VRVIII 111 5 and III Q Series Method of Error Detection Abnormality is detected according to the temperature detected by the discharge pipe thermistor Error Decision Conditions When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenly Supposed Causes W Defective discharge pipe thermistor W Defective connection of discharge pipe thermistor W Defective outdoor unit PCB 136 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged Connect the service checker Press reset and start operation again Check if discharge N pipe thermistor o Replace the property i normal discharge pipe 1 thermistor Service Checker Connect the service checker to compare the temperature of discharge pipe by using service checker with actual measurement value of discharge pipe thermistor Check if temperature of discharge pipe by using service checker is the same with actual measurement
21. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting A Caution may be damaged Check in the monitor mode 4HP 6HP class models have 2 fans Check fan motor fan motor 1 or 2 corresponding to error code E7 in the monitor mode of outdoor unit PCB Cut the power supply OFF and wait for 10 minutes Check if any foreign YES substances around the fan O Fan motor 1 Connector of PCB O Fan motor 2 Connector of PCB Check if YES Check the connection status of the connectors any connector is disconnected Check the color of relay connectors O Fan motor 1 Both power supply wire and signal wire are all white O Fan motor 2 Both power supply wire and signal wire are red in the PCB side and white in the motor side Relay connectors have YES Be sure to turn off the power switch before connecting or disconnecting connectors or parts gt Remove the foreign substances gt Insert the connector gt Correct the any connection connection of the relay connectors 122 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller No continuity of fuse on main PCB YES Replace the PCB Unable to r
22. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged replaced or has the indoor outdoor or outdoor outdoor unit transmission wiring been modified YES gt Press and hold the RESET button on the outdoor unit main PCB for 5 seconds The unit will not operate for up to 12 minutes All indoor unit remote controllers of the same refrigerant system display Is indoor outdoor and outdoor outdoor unit transmission wiring normal YES Replace the indoor unit PCB indicated by the error code Reset the power supply NO Fix the indoor outdoor or outdoor outdoor unit transmission wiring Outdoor unit PCB micro computer monitor HAP blinks voltage between terminals L1 and N of the outdoor unit PCB is 220 240 V Supply 220 240 V 286 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller The fuse on the outdoor unit s PCB is burnt YES gt Replace the fuse gt Replace the outdoor unit PCB 287 http sp
23. 4 Flow 2 Connection of erroneous models of indoor units 9000999 To Diagnosis Check 3 4 Flow 3 Defective combination of outdoor units 2090000 02009000 To Diagnosis Check 3 4 Flow 4 Defective wiring in units dedicated to multi connections 900009 90090600 To Diagnosis 5 Check 3 Check 4 Flow Connection of erroneous models of BS units 90000909 9000999 I To Diagnosis o Flow 6 Defective wiring between outdoor units and BS units 326 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check 3 4 9 0 EIDO OP e P PH To Diagnosis ow Defective wiring between BS units Y Check 3 Check 4 9 o 0099 9009 9 9 To Diagnosis Defective wiring between indoor units and BS units 327 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 1 Check 3 Check 4 G20 0 e000000000090 of indoor uni
24. The micro computer normal monitor green of the inverter PCB is blinking NO gt Replace the inverter PCB f the spare PCB has significant damage the compressor is probably get defective In this case carry out inspections on the compressor again The YES c error Replace the recurs control PCB gt Continue the operation It is supposed that the error results from causes such as instantaneous power failure 228 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display we Applicable Models VRVII S 1 5 WII and WIII Series Method of Error Detection Check the communication state between inverter PCB and control PCB by micro computer Error Decision Conditions When the correct communication is not conducted in certain period Supposed Causes W Defective connection between the inverter PCB and outdoor outside unit control PCB W Defective outdoor outside unit control PCB transmission section W Defective inverter PCB Defective noise filter W External factor Noise etc 229 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connect
25. gt The number of indoor units exceeds the standard Check the connection to correct Diagnosis Flow 2 Check 3 Check 4 9000090090000099 Check if the refrigerant Replace the outdoor unit main PCB gt Match the refrigerant types of the outdoor unit and the indoor unit 323 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 3 Check 3 Check 4 G20 000800000000 Check if the outdoor unit PCB is replaced with a spare PCB NO Check if the unit is not connected to outdoor units of different models NO Replace the outdoor unit main PCB Check the model of the outdoor unit Is a correct spare PCB procured NO gt Replace it with the correct spare PCB Check if the spare PCB setting is correct NO gt Correct the setting to reset the power gt Replace the spare PCB Diagnosis Flow 4 Check 3 Check 4 d00000000000000 gt Replace the outdoor unit main PCB 324 http splitoff ru tehn doc html Troubleshooting by Indication o
26. http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 59 Reverse Phase Open Phase Remote Controller Display too LE i Applicable Models VRVII WII and Series Method of Error Detection The phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged Error Decision Conditions When a power supply is reverse phase or T phase is open phase Supposed Causes W Power supply reverse phase W Power supply open phase W Defective outdoor outside unit PCB 259 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged an open phase at the power supply YES gt Rectify the open terminal of the outdoor outside unit Operation is normal if one YES phase Requires inspection of field power supply section place of power supply line phase is replaced Reverse phase Countermeasure of the problem is completed by phase replacement Replace the outdoor outside unit PCB 260 http splitoff ru tehn doc html Troubleshooting by Indication on th
27. 1 Mount a pressure gauge on the low pressure service port 2 Reset the operation using the remote controller and then restart the operation characteristics of the low pressure sensor normal NO Replace the low pressure sensor Service Checker Connect the service checker to compare the low pressure value checked with the Service Checker and the actual measurement value by pressure sensor 1 pressure value and the actual measurement value by pressure sensor are the same Replace the outdoor unit main PCB The low pressure sensor is normal and the pressure detected with the PCB is also normal The low pressure has really become low WV Remove the causes by which the low pressure has become low 105 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller n Note 1 Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge As to the voltage of the pressure sensor make measurement of voltage at the connector and then convert it to pressure 2 Make measurement of voltage of the pressure sensor 5V Connector for low pressure sensor Blue Red 3 Black Micro computer A D input 2 White 1 Make measurement of DC voltage b
28. 117 3 29 5 Electronic Expansion Valve Coil Abnormalily Een 130 3 30 2 Abnormal Discharge Pipe Temperature sese 136 3 31 5 Refrigerant Overcharged 143 3 32 43 High Pressure Switch System Abnormality o 148 3 33 Outdoor Unit Fan Motor Signal Abnormality riors iis nite oit cete 150 3 34 45 Outdoor Air Thermistor Abnormality 155 3 35 Water System 159 3 36 High Pressure Sensor Abnormality 162 3 37 Current Sensor Abnormality 165 3 38 Discharge Pipe Thermistor Abnormality 168 3 39 Heat Exchanger Gas Pipe Thermistor Abnormalilty retenti eniin 170 3 40 25 Suction Pipe Thermistor Abnormality 172 3 41 25 Outdoor Unit Heat Exchanger Thermistor Abnormality 174 3 42 Liquid Pipe Thermistor Abnormality 176 3 43 22 Thermistor System Abnormality 178 3 44 4 5 Subcooling Heat Exchanger Gas Pipe Thermistor Abnormality 180 3 45 High Pressure Sensor Abnormality 182 http splitoff ru tehn doc html VRV Series 3 46 Discharge Pipe Pressure Sensor Abnormality 185 3 47 Low Pressure S
29. Has the fan driver caused damage YES Replace the outdoor unit main PCB PCB NO replaced is badly damaged the fan motor is likely to get defective To make sure recheck the compressor Y Turn ON the power supply Stop standby before the fan rotates Recheck for the power supply If there is no problem with the power supply replace the noise filter PCB If the error recurs replace the inverter PCB Power ON 275 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Power ON i Stop standby when the compressor starts up YES Recheck for the power supply If there is no problem with the NO power supply replace the main PCB the PCB replaced is badly damaged compressor is likely to get defective To make sure recheck the compressor Check the harness and then replace it if necessary gt End of measures The error may temporarily result from onsite causes Causes Instantaneous power failure open phase noises or else The 2 error recurs 276 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display uc Applicable Models VRVII and WII Series
30. vnez OMX ed 1 9 pejunoy We 08 Weo wos Wor wee Wsz woz DOX4 ad egesse payunoyy Bulao WOS wWor woz OZX4 pny pedwog ed yasseg payunoyy Buy 892 400 dog 9 dos dor asz OJX4 punoy adh egesse payunoyy Bulag JoquiAS ed 1oopu 11 http splitoff ru tehn doc html Symptom based Troubleshooting 1 Symptom based Troubleshooting Symptom Supposed Cause Countermeasure 1 The system does not start Blowout of Turn OFF the power operation at all fuse s supply and then replace the fuse s Cutout of If the knob of any breaker s breaker is in its OFF position turn ON the power supply If the knob of any circuit breaker is in its tripped position do not turn ON the power supply ON 2 Knob lt Tripped OFF Circuit breaker Power failure After the power failure is reset restart the system 2 The system starts operation but makes an immediate stop Blocked air inlet or outlet of indoor or outdoor unit Remove obstacle s Clogged air Clean the air filter s filter s 3 The system does not cool or Blocked air inlet or outlet Remove heat air well In cooling In cooling In coo
31. 8 Was the centralized control group No for indoor unit changed NO gt Check whether or not there are no problems with the transmission YES wiring length types of cables and wires number of units connected and others If no problems replace the indoor unit PCB Reset the power supplies of every centralized control equipment For the intelligent Touch controller register the air conditioner again while in DIII NET test run menu 338 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller the transmission wiring between centralized control equipment for any broken wire For details refer to information in the Procedure for checking broken wires section 13 Abnormal gt Correct the wiring Normal wiring with the master unit centralized control equipment for any broken wire For details refer to information in the Procedure for checking broken wires section CHECK 13 Abnormal gt Correct the wiring Normal http splitoff ru tehn doc html 339 Troubleshooting by Indication on the Remote Controller the master unit central setting NO gt Correct the connector been connected Disconnec
32. 98 eBJeuosiq JO WO Ayjeuuouqv v8 e e e e e e e e e e e e e uonong 10 62 Ayjeuuouqv 08 e e e e e e e e e e e e e edid seg joisiuueu 59 Ayjeuuouqv 8 e e e e e e e e e e e e e adig 20 75 yjeuuouqy Z e e e e e e e e e e e e e Aioede2 py M e e e jur dv ne NX3 1X4 HX3 LAS SX4 3X3 OXA SJUB UOD 10214 n 1002 Joug For the model names refer to P 2 11 25 http splitoff ru tehn doc html Troubleshooting by Remote Controller W R 410A 109 99 6e Uoisuedx 6Y Ayjeuuouqv 99 Ajddns 8v Ayjeuuouqv i 00N dela Bums 4Y JOON 19 ue4 Joopu jo 4907 9v JOON 29 e ue j Joopu jo 4907 9v JUBIINDIBAOC 99 JOJO uey un JOODU 9v zs 4LW 110 ues OY yjeuuouqy 1 5 6v 044002 ure1q ev
33. f the inverter PCB is badly damaged recheck the compressor YES The 2 error recurs gt Check the harness gt Continue the operation The error may temporarily result from external factors Causes Instantaneous power failure open phase noises or else Refer to P 354 268 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display uc Applicable Models VRV WIII Series Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Error Decision Conditions When the capacitor above only has a voltage of 360 V or less YL and 210V or less TL Supposed Causes W Power supply insufficient Instantaneous failure Open phase Defective inverter PCB Defective outside control PCB Defective magnetic contact switch Defective main circuit wiring 269 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is connection wire connected between the connector NO gt Repair wiring Turn ON again Turn the magnetic
34. Faulty discharge pipe thermistor 2 Slave 1 STD compressor 1 Faulty discharge pipe thermistor 3 Slave 1 STD compressor 2 Faulty discharge pipe thermistor 1 Slave 2 INV compressor Faulty discharge pipe thermistor 2 Slave 2 STD compressor 1 Faulty discharge pipe thermistor 3 Slave 2 STD compressor 2 Refer to the J3 flow chart of each manual and make a diagnosis of the relevant compressor of the relevant unit based on the Error code shown to the left J5 01 J5 02 45 03 J5 04 J5 05 5 06 Faulty suction pipe thermistor Master Faulty accumulator inlet thermistor Master Faulty suction pipe thermistor Slave 1 Faulty accumulator inlet thermistor Slave 1 Faulty suction pipe thermistor Slave 2 Faulty accumulator inlet thermistor Slave 2 Refer to the J5 flow chart of each manual and make a diagnosis of the relevant thermistor of the relevant unit based on the Error code shown to the left 41 http splitoff ru tehn doc html Troubleshooting by Remote Controller Error Troubleshooting code Description of error Description of diagnosis 46 01 Faulty heat exchanger Refer to the J6 flow chart of thermistor Master each manual and make a d
35. SHIIASA ANA 89095 VOLY H cc jueJeBujes 29 http splitoff ru tehn doc html Troubleshooting by Remote Controller 9 e e 205591409 JO ueunoJeAQ 1 e 203591909 JO jueunoJe Q 87 OL e e e e e e e e JosseJduio JO 20 e 203391909 JO jueunoJeAQ G1 id coc ejnjejeduue v1 00c e Ajjeuuouqy god 46L e god 761 e Ayjeuuouqy god L1 16 e e yjeuuouqy Josuas eunsseJd edid uonong 881 e e e Ayjeuuouqy 4osueg ainsseiq Mo1 OF 981 e e e e e e yjeuuouqy Josuas eunsseJq eBjeuosiq c8L e e e Ayjeuuouqy Josuas eJnsseJg vf 081 e e e e e e e e ypwouqy owy add seo abueg eH Buyoooqng er 811 e Ayjeuuouqy uejs s Jojsiuueu er ia d d W va VN SJU9JUOD JOU OMAYA SAHAYA MAYA SAYA 59095 VOLY H cc jueJeBujes 30 http splitoff ru tehn doc html Troubl
36. 303 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check if the normal condition monitor LED for the external control adaptor for outdoor unit NO Check if the power supply wire for the external control adaptor for outdoor Connect the power supply wire for the external control adaptor for outdoor unit to 5V supply line Replace the PCB of the external control adaptor for outdoor unit gt Replace the outdoor unit main PCB 304 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 2 Check of error 3 Check of error 4 0200 0e0000000000 Cool Heat NO selection is unified gt C H SELECT of the external control adaptor for outdoor unit is set to IND Setting of C H SELECT of the external control YES gt The unified adaptor for outdoor addresses for unitis ilg COOL HEAT within the outdoor outdoor transmission are duplicated Set the address again Setting of C H SELECT of NO the external control adaptor for outdoor S De main unit
37. Defective indoor unit PCB 289 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the detailed error status in the monitor mode In Confirmation of error 4 LED Go on to P 282 lamp indicates as NO LED lamp follows display 900060099 9006020 Check if indoor unit PCB or outdoor unit PCB has been replaced Or check if YES gt Press the indoor outdoor outdoor outdoor connecting wires has been modified RESET button on the main PCB of the master outdoor unit Keep pressing for 5 seconds or more Operation does not start for a maximum 12 minutes indoor remote controllers within the same refrigerant circuit display the indoor outdoor outdoor outdoor connecting wires normal Replace the indoor unit PCB Correct the connecting wires 290 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Reset power supply unit PCB blink Voltage between R S terminals on the outdoor unit PCB 400V Correct the vo
38. VRV Series 2 6 VRVIII S P Series d9 dS dv OWXY d9 dS VINAXY joquiAs apo sun m VINOOL VILL i 2 uonoeuuo LA VINSZL VOOL E ONXA ed pepuedsns bullied s VINE9 VINOS VINZE wasz VINOZ ONX4 9 1 Buipuejs 100 4 pajeeou0D z gt VINE9 VINOS Vor VINZE VINSZ VINOZ 01X4 adh 1004 VINE9 VINOS VINCE VINSZ VINOZ Ovx ed pejunoy IeM WOOL E OHX4 adh pepuedsng Butte VINOOL VINOB VINE VINOS vor OWX4 adh jong pajunoyy wszl wool wog Weg wos woz OSX4 ed pejunow 9 NOS NSZ 1 5 x YNOS VNSZ VNOZ SAVN OGX4 5 E dsz 1 gt F dsz 0 9 VINO VINS a OMXJ ed egesse pejunoy Sulo wszl woor wog Weg wos Wor wsz O4X4 wol adh pejunoy WSZL wos weg wos Wor WeE WSz Woz 09X4 pejunoy Buleo joquiAs
39. Woz ed Buipuejs 10014 weg Wwos wze woz Ovx4 ed pejunoy IeM WOOL 59 Wze OHX4 ed pepuedsns wezi WOOL wog weg wos Wor OWXJ ed 3 Wool WOS Wor WeE WSz Woz OSX4 d S W umng peyunow 9 NOS d S ed payunoyy weg wor wee a OMX4 ed 1 09 egese wezi 1400 wog weg Wor wze wez wol 9 1 eyesse Wor Woz OZX4 009x009 mo 4 HINW p zuno Buleo weg wos Wor Wee woz 09X4 9 1 egesse p yuno buao joquiAs adky spun Joopu http splitoff ru tehn doc html VRV Series 2 3 VRV WII M Series m woe WoL LA JoquwiAs 9polA adh sun ii VINOOL VINLZ yun uogosuuog LA x VNGZL YOOL onx4 ed egesse pepuedsns fulag Yeg VINOS VINZE VINSZ VINOZ ONX4
40. An error in the detection of position of the fan motor Check for the connection of the connector between the fan motor and the PCB for the fan If the connection is normal replace the fan motor If this still cannot solve the error replace the PCB for the fan A8 01 Power supply voltage error Check for the input voltage of the fan motor A9 01 9 02 Electronic expansion valve error There is an error in the expansion valve coil or a connector disconnected Refrigerant leakage detection error Refrigerant leaks even if the electronic expansion valve is closed Replace the electronic expansion valve 35 http splitoff ru tehn doc html Troubleshooting by Remote Controller Error Troubleshooting code Description of error Description of diagnosis AH 03 Transmission error between Check for the connection of the the self cleaning decoration harness connector between the panel and the indoor unit panel PCB and the indoor unit when the self cleaning PCB decoration panel is mounted 04 Dust detection sensor error Check for the connections of the when the self cleaning connector 12 on the panel decoration panel is mounted PCB and the connectors X18A and X19A on the sensor PCB AH 05 Dust collection sign error Check for cloggi
41. Install the correct capacity setting adaptor After establishing transmission for indoor and outdoor diagnose the operation again 83 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 16 23 Thermistor for Suction Air Abnormality Remote Controller Display a Applicable Models All indoor models Method of Error Detection Error detection is carried out by temperature detected by suction air thermistor Error Decision Conditions When the suction air thermistor becomes disconnected or shorted while the unit is running Supposed Causes W Defective thermistor for suction air W Defective indoor unit PCB 84 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Remove the thermistor from the indoor unit PCB and then insert it again Is the thermistor Normal The error is caused by defective contact Remove the thermistor from the indoor unit PCB thermistor using a multiple meter 5 to 90 11 gt Replace the thermistor Replace the indoor unit PCB MITT Refer to P 369
42. Remarks riteria 1 2 U 2 P2 V 2 15kQ 3 P2 Ww 4 U P2 5 V P2 Due to condenser charge and 6 P2 15 so on resistance 7 N3 including measurement may require some time 8 N3 V 9 N3 Ww 10 U N3 11 V N3 2 15kQ 12 Ww N3 354 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller When using the digital type of multiple tester make measurement in diode check mode 9 Measuring No point Judgement Remarks Criteria 1 P2 U Due to condenser charge and so on resistance 2 measurement may require 3 P2 WwW some time 4 U P2 5 V 2 6 2 0 3 0 7V 7 U 8 N3 V 8 N3 Ww 10 U N3 Due to condenser charge and 11 V N3 1 2V and 80 0 resistance F measurement may require 12 N3 some time 355 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller PCB and Circuit Diagram YPCT3ISI3 1A fh 356 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 155 Check for causes
43. YES Disconnect the connection between the compressor and inverter Make the power transistor check mode ON by service mode Inverter output voltage check Inverter output voltage is not balanced Normal if within x10V for Y1 YL NO gt Unsatisfactory pressure equalization Check refrigerant System power supply and 5V for TL power supply Must be measured when frequency is stable gt Replace the inverter PCB 224 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller After turning ON again 5 blinks again NO Reset and restart Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the compressor Higher voltage than actual is displayed when the inverter output voltage is checked by tester 225 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 54 L Transmission Error between Inverter and Control PCB Remote Controller Display we Applicable Models VRVIII and III Q Series Method of Error Detection Check the communication state between inverter PCB and control PCB by micro computer Error Decision Conditions When the correct communicati
44. YES gt Press and hold the RESET button on the master outdoor outside unit PCB for 5 seconds The unit will not operate for up to 12 minutes All indoor unit remote controllers of the same refrigerant system display arn ua NO outdoor outside and outdoor outside YES Replace the indoor unit PCB Reset the power supply D Fix the indoor outdoor outside unit transmission wiring 295 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Outdoor outside unit PCB micro computer monitor HAP blinks The voltage between terminals L1 and N of the outdoor outside unit PCB is 220 240 V YES Supply 220 240 V The fuse on the outdoor outside unit s PCB is burnt YES Replace the fuse secondary voltage of the transformer is about 22 V Replace the transformer replacement Operation ready amp rd is Replace the a outdoor outside YES unit PCB Lamp MEE does not go off for 12 minutes or gt Pio ana hold more e button on the outdoor outside unit PCB for 5 seconds 296 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Is indoor Outdoor outside
45. error is caused by defective contact Remove the thermistor from the indoor unit PCB and then make resistance measurement of the thermistor using a multiple meter 5 to 90 NO Replace the thermistor Replace the indoor unit PCB NIIT TI Refer to P 369 81 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 15 5 Combination Abnormality between Indoor unit PCB and Fan PCB Remote Controller Display Lo Applicable Models FXMQ20 140P Method of Error Detection Check the condition of transmission with fan PCB using indoor unit PCB Error Decision Conditions When the communication data of fan PCB is determined as incorrect Supposed Causes W Defective fan PCB W Defective connection of capacity setting adaptor W Field setting error 82 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before N connecting or disconnecting connectors or Caution parts may be damaged Is the NO type of fan PCB correct Replace it with the correct fan PCB indoor unit PCB replaced with a spare PCB capacity setting adaptor installed when replacing it with a spare PCB
46. 1924 100 108 3169 JOS JOv Ie 792 4X4 nin ed egesse Bulie 1821 708 159 109 10 wej sz 702 OX3 aqnoq ed p sseg pejunoy suu Joopu splitoff ru tehn doc html http VRV Series 1 2 VRVII S M Series AWA wg WS Wr NX WA wg WS Wr 100pjnO m 189 105 Tor We 792 702 NX4 9 1 Buipuejs 100 4 pejeeouo 189 705 107 1 qsz Wc 1x4 ed Burpuejs 10014 159 105 Jov 1 792 702 ed IeM 700 159 E i HX3 edi pepuedsng 6 1921 1001 708 19 7095 Or Wx3 ed jong pajunoyy LA yoo 508 9 09 MSZ yoz S8AX4 uojong ed 1921 1001 7081 729 10S Ize 702 ed urying pejunoy Bui veg VAOS vaze VMOZ GAX3 ed payunoyy JA weg WOS Wor wze wsz woz ax4 ed fulla uis 19 10 7221 792 ed 1909 eyesse pejunow 6 1921 1001 08
47. By disconnecting the connector for the fan motor from the indoor unit PCB the fan can be lightly rotated by hand NO Replace the fan motor Disconnect the connector from the fan motor and then make measurement of resistance between pins 2 Is the resistance between the pins more than the judgement criteria NO gt Replace the fan motor YES gt Replace the indoor unit PCB 53 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller B Note If any junction connector is provided between the connector on the indoor unit PCB and the fan motor also check whether or not the junction connector is properly connected 2 All resistance measuring points and judgement criteria Example 12345 FXA Q 1White FG FXF Q FG Vsp Voc O OO OO 2 Orange Vsp 3 vag a 4 Blue GND Judgement Criteria 5 Oc Measuring point Criteria FG GND 1MQ or more 6 Ol Vsp GND 100kQ or more Vcc GND 100Q or more 7Red O vic Vdc GND 100kQ or more 54 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 5 AA Indoor Unit Fan Motor Abnormality Remote Controller
48. DAIKIN Si30 701_A Service Diagnosis TRY http splitoff ru tehn doc html VRV Series Applicable 2 1 Symptom based Troubleshooting 12 2 Troubleshooting by Remote Controller 18 2 1 The INSPECTION TEST Button 18 2 2 Self diagnosis by Wired Remote Controller 19 2 3 Self diagnosis by Wireless Remote Controller 22 2 4 Error Codes and Description 24 2 5 Error Codes Sub Codes 35 Troubleshooting by Indication on the Remote Controller 46 3 1 5 External Protection Device Abnorimality 3 nero dett sie 46 3 2 PCB Abnormality 48 3 3 43 Drain Level Control System S1L Abnotimality cti tet 49 3 4 A5 Fan Motor M1F Lock Overload 52 3 5 55 Indoor Unit Fan Motor Abnormality 55 3 6 75 Overload Overcurrent Lock of Indoor Unit Fan Motor 57 3 7 A Swing Flap Motor 15 Abnormality 63 3 8 55 Power Supply Voltage Abnormality 66 3 9 55 Electronic Expan
49. Error Decision Conditions In case of detection of abnormal signal at starting fan motor Supposed Causes W Abnormal fan motor signal circuit error W Broken short or disconnection connector of fan motor connection cable Defective fan Inverter PCB 153 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn power OFF Is the fan motor connector connected to PCB for fan inverter correctly NO Connect correctly YES Check connector of fan motor 1 resistance of fan motor read wire connector pins between Vcc UVW and GND UVW balanced NO gt Replace the fan motor YES gt Replace the fan inverter PCB 1 Disconnect connector and measure the following resistance 5 O GND 4 Fink Measure the resistance between Vcc 3 Orange Q UVW and GND UVW 2Bue V 1Yelow O U 154 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 34 45 Outdoor Air Thermistor Abnormality Remote Controller Display Applicabl
50. Method of Error Detection Detect the abnormal signal for the other indoor units within the circuit by outdoor unit PCB Error Decision Conditions When the error decision is made on any other indoor unit within the system concerned Supposed Causes W Transmission error within or outdoor of other system W Defective electronic expansion valve in indoor unit of other system W Defective PCB of indoor unit in other system W improper connection of transmission wiring between indoor and outdoor unit 316 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn ON all indoor units All the units are indicating 5 NO gt Continue the operation us has been NO displayed for 2 Re diagnose by minutes or display after more passage of 2 minutes or more The outdoor unit PCB indicated by the error code 45 is normal Check for the indoor unit of other system and then conduct troubleshooting by diagnosis according to the Error Code Flowchart 317 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controlle
51. Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Error Decision Conditions When the capacitor above only has a voltage of 360 V or less YL and 210V or less TL Supposed Causes W Power supply insufficient Instantaneous failure Open phase Defective inverter PCB Defective outdoor outside control PCB Defective magnetic contact switch Defective main circuit wiring 277 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is connection NO wire connected between the connector Turn ON again Turn the NO gt Repair the wiring magnetic contact switch ON The voltage between the P2 or P3 and N3 terminals is 320 VDC YL or more and NO 190 VDC TL or less when the compressor is running gt Replace the inverter PCB gt Monitor field power supply 278 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Is 220 240 V of power reaching the magnetic contact switch coil YES gt
52. NO Continue the operation Momentary failure possible gt Replace the inverter compressor Refer to P 354 http splitoff ru tehn doc html 209 Troubleshooting by Indication on the Remote Controller Remote Controller Display c Applicable Models VRVII WII 1 5 WIII Series Method of Error Detection Error is detected from current flowing in the power transistor Error Decision Conditions When an excessive current flows in the power transistor Instantaneous overcurrent also causes activation Supposed Causes W Defective compressor coil disconnected defective insulation W Compressor startup error mechanical lock W Defective inverter PCB 210 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Compressor inspection Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged The compressor s coil is disconnected or the insulation is defective YES Replace the compressor Disconnect the connection between the compressor and inverter Make the power transistor check mode setting ON by service mode Inverter output voltage check Inverter output voltage is not balance
53. Supposed Causes W Defective discharge pipe thermistor W Defective connection of discharge pipe thermistor W Defective outdoor unit PCB http splitoff ru tehn doc html 141 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Discharge pipe YES temperature is 115 C gt Refrigerant or higher shortage compression defect etc Defective refrigerant system Characteristics of NO the discharge pipe thermistor normal gt Replace the discharge pipe thermistor gt Replace the outdoor unit PCB NIIT TI Refer to P 369 142 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 31 7 5 Refrigerant Overcharged Remote Controller Display Applicable Models VRVIII 111 5 and Series Method of Error Detection Excessive charging of refrigerant is detected by using the outdoor air temperature heat exchanger deicer temperature and liquid pipe temperature during check operation Error Decision Conditions When the amount of refrigerant which is calculated by using the outdoor air temperature heat exchanging deicer temperature and liquid pipe temperature during che
54. YE P Replace the earth leakage detection PCB No Y Reinstall all wirings Y Turn ON the power supply 95 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check whether there is continuity between both connector Replace the ends of the earth earth leakage leakage detection PCB detection No continuity 1 Continuity continuity between No continuity both ends of high pressure switch gt Replace the high pressure switch Continuity Normal It is supposed that ground leakage occurs due to temporary liquid back or accumulation of refrigerant This phenomenon can occur when power fails while in operation or is cut off for an extended period of time B Note Itis normal that there is no continuity between both ends of connector when the power supply turns OFF and for a period of 9 seconds at maximum after the power supply turns ON 96 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 22 3 Actuation of High Pressure Sensor Remote Controller Display co la al Applicable Models VRVII and 1 5 Series Method of Error Detection Abnormality is detected when the contact of the high pressure protection s
55. http splitoff ru tehn doc html 193 Troubleshooting by Indication on the Remote Controller 3 49 i Inverter PCB Abnormality Remote Controller Display oo Applicable Models VRVIII Series Method of Error Detection Error is detected based on the current value during waveform output before starting compressor Error is detected based on the value from current sensor during synchronous operation when starting the unit Error Decision Conditions Overcurrent flows during waveform output Defective current sensor during synchronous operation IPM failure Supposed Causes W inverter PCB IPM failure Current sensor failure Drive circuit failure 194 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power supply once and then check the compressor lead wires Do the lead wires have any disconnection broken wire short circuit or ground fault YES Replace the lead wires Turn ON the power supply again Does the power YES supply normally gt t is supposed come back that the error results from ON external causes other than failures e g exogenous s
56. http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 4 Error Codes and Description 2 4 1 Indoor Uni R 22 109 59 IT SUN Bus ZY 100W 19 e ue 1 Jo 4907 JUALINDIOBAC 9v 100W 19 1 Jo 4907 JUALINDIBAC 9v Ayjeuuouqv 33 Joopul 9v 5 001 4 100W ueg yjeuuouqy 1 5 103409 ev god LY Ayjeuuouqv 9v OV d 58 exa axa axa oxa 11409 1014 1019 For the model names refer to P 2 11 24 http splitoff ru tehn doc html Troubleshooting by Remote Controller 06 U JOjSIUJ9U L Ayjeuuouqy
57. to IND Cool heat selection is NO unified C H YES SELECT is set to MASTER to IND The cool heat unified address for outdoor outside units in outdoor outside outdoor outside unit transmission is duplicated Set the address correctly 312 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller C H SELECT is set to SLAVE YES Check and see if the following items are normal NO Fix the problem External control adaptor for outdoor outside unit els there continuity eDoes the cool heat unified address match Outdoor outside unit unified master unit els there continuity eDoes the cool heat unified address match Does an error occur when the cool heat selector is set to IND NO Replace the outdoor outside unit outdoor outside control adaptor replacement Replace the outdoor outside unit PCB 313 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 65 US Transmission Error between Main and Sub Remote Controllers Remote Controller Display Applicable Models All indoor models Method of Error Detection In case of controlling with 2 remote controller c
58. 1 Buipuejs 100 4 pajeeou0D E VWe9 VINOS VINZE VINSZ VINOZ adh 200 VINE9 VINOS Vor VINZE VINSZ VINOZ Ovx ed pejunoy IeM 00 veg YNZE OHX4 ed pepuedsns viNOSZ VINOOZ VINOOL VINOS VINE9 VINOS VINO x OWX4 jong Wool Weg 09 Wee woz OSX4 ed pejunow 9 NOS LSAN OQXJ E E VNE9 YNOS VNSZ VNOZ SAVN OGX4 dsc 1 4 s E VEO VINSC OMX4 ed pejunoy fulle wsz WOOL wos Wor wez OJX4 nini adh WSZ weg wos wor Wee woz OOX4 sdk egesse Bulao JoquiAs SHUN http splitoff ru tehn doc html VRV Series 2 4 VRVIII P A Series 3A voor VINLZ y
59. Master Gach manual and make Inverter PCB diagnosis of the relevant unit based on the Error code shown L1 03 Current offset error Master to the left Inverter PCB 42 http splitoff ru tehn doc html Troubleshooting by Remote Controller Error Troubleshooting code Description of error Description of diagnosis L1 04 IGBT error Master Inverter The inverter PCB may be faulty PCB or a PCB other than the specified one is mounted Refer to the L1 flow chart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left L1 07 Instantaneous overcurrent The inverter PCB may be faulty Slave 1 Inverter PCB Refer to the L1 flow chart of L1 08 Current sensor error Slave eacmmanyalandmake 4 Inverter PCB diagnosis of the relevant unit based on the Error code shown L1 09 Current offset error Slave 1 to the left Inverter PCB L1 10 IGBT error Slave 1 Inverter The inverter PCB may be faulty PCB or a PCB other than the specified one is mounted Refer to the L1 flow chart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left L1 12 Instantaneous overcurrent The inverter PCB may be faulty Slave 2 Inverter PCB Refer to the L1 flow chart of L1 13 Current sensor error Slave eac
60. PCB ea Overcurrent of inverter compressor Electronic thermal Compressor overload running An overcurrent of 19 0A or more continues for a period of 5 consecutive seconds or that of 16 1A or more continues for a period of 260 consecutive seconds For 230V units A current of 33 5A or more continues for a period of consecutive 5 sec or that of 27 6A or more continues for a period of consecutive 260 sec The inverter loses synchronization Back flow of compressor liquid Sudden changes in loads Disconnected compressor wiring Defective inverter PCB 365 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Condition for Protection device and others Code Name d nen Major cause etermining error 1 Defective No output is given Defective heavy inverter PCB current part of compressor 48 Defective The compressor Liquid sealing or startup of motor fails to start up defective inverter compressor compressor Excessive oil or refrigerant Defective inverter PCB 5 Inverter The compressor is Defective compressor the locked status compressor lock does not rotate 1 Radiation fin The radiation fin Defective fan temperature temperature reaches Running in rise 87 or more while overload for an operation extended perio
61. Remote Controller Display Lt Applicable Models FXFQ Method of Error Detection Even if an error occurs operation still continues Error is detected according to the moisture output voltage detected by the moisture sensor Error Decision Conditions When the moisture sensor is disconnected or short circuited Supposed Causes Defective sensor Disconnection 88 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Remove the humidity sensor from the indoor unit PCB and insert it again YES Does it function It is normal normally Poor connector contact Delete the error code history from the remote controller 1 displayed on the YES Replace the remote controller p humidity sensor PCB 3 gt t is believed that external factors noise or else other than failure caused the error 1 To delete the history the ON OFF button of the remote controller must be pressed and held for 5 seconds in the check mode 2 To display the code the Inspection Test Operation button of the remote controller must be pressed and held in the normal mode x3 If IL is displayed even after replacing the humi
62. VIFOI OWS OSX4 OAX4 0 O3X4 OZX4 09X4 8 09 103 3 For the model names refer to P 2 11 27 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 4 2 Outdoor Uni 651 e e jeuuouqv 951 e e e efueuosiq jeuuouqv 24 eel e e e e e e yjeuuouqy 109 uorsuedx3 21 051 e e e yjeuuouqy 109 uorsuedx3 21 63 171 e Ayjeuuouqy 921 e e Ayjeuuouqy LoL e Ayjeuuouqy 11 e Ayjeuuouqy uey J00pinO 73 e e e e 7 Jojo Josse duio 015 93 ci e e 907 JOSSeJduJ0 601 e e e 907 JOJO 10 949 109 20 e e e e 3907 JOJO 10SSseJduj02 1eueAu Gy voL e e e e e eunsseJg uonong jeuuouqv ZOL e e e e Josueg eunssaJd Jo uonenjov 73 66 e e e e e eDueuosiq jeuuouqy 46 e e e e Josueg eunsseJg jo uonenpy 23 v6 e e e e Assy uonosjeq yee Aq eBexee1 uue3 23 26 e e e e e e e e e Ayjeuuouqy 894 13 den d d Wd s ua u09 1043
63. W Compressor coil disconnected W Defective inverter PCB Disconnection of compressor 213 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Output current check Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution Power OFF may be damaged Is the stop valve Open the stop open valve Check if the compressor lead wires are normal NO Replace the compressor lead wires Check if the wiring and connection to the compressor are normal Correct the wiring and connection Insulation resistance of the compressor is 100 kQ or below YES Replace the inverter compressor Compressor coils are disconnected YES Replace the inverter compressor Check if the power transistor is normal NO Replace the inverter PCB Connect the compressor lead wires then restart the operation 214 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Error code 2 is displayed again NO gt Continue the operation Check if the pressure difference between NO high pressure and low Defective pressure bef
64. and the inverter PCB are not normal Instantaneous overcurrent of inverter compressor When inverter output current exceeds 460V units 32 3A 230V units 59 1A even instantaneously Overcurrent of inverter compressor For 460V units An overcurrent of 19 0A or more continues for a period of 5 consecutive Seconds 2 An overcurrent of 16 1A or more continues for a period of 260 consecutive Seconds For 230V units DA current of 33 5A or more continues for a period of consecutive 5 _ Sec 2 A current of 27 6A or more continues for a period of consecutive 260 sec 8 phase 230VAC part Power transmission etc 11 PD Imbalanced power When imbalance in connected voltages among Radiation fin three phases temperature rise comes to 2 or When the more radiation fin Power supply temperature voltage error reached 87 C or more When the power supply voltage falls out of the Defective radiation fin thermistor When the radiation fin PCB mismatching supply voltage When incorrect inverter PCB is Compressor Defective startup of inverter compressor Compressor stops running immediately after it starts up Inverter compressor lock Compressor does not run at all range of thermistor resistor detects an 460VAC 10 open circuit 30 C or less 230 10 short circuit 120 or more Defective radiation inverter When the radiat
65. excess of 14V for 460V units or 6V for 230V units See 1 YES YES Open phase Open phase Normalize the field cause Repair the power supply voltage imbalance imbalance in voltages applied to the inverter in excess of 14V for 460V units or 6V for 230V units 2 YES Parts or wiring defect After turning the power supply OFF check and repair the main circuit wiring or NO parts When voltage monitoring is possible gt 1 Loose or 4 disconnected Using a device capable bel of constant recording of power supply power supply voltage and inverter record power supply 2 Magnetic voltage between 3 contact phases L1 L2 L2 L3 disposition L3 L1 for about one fusion or continuous week contact is Y poor No abnormalities are observed in the power supply but the imbalance in voltage recurs 3 Loose or disconnected noise filter Power supply voltage imbalance Even if the power supply voltage is not unbalanced when measuring it there are many cases where it gets unbalanced during night time around 6 00PM to 10 00PM measure gt Replace the inverter PCB 235 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller l Explanation for users In accordance with notification of insp
66. gt The patterns marked with have nothing to do with those described in the list of setting of master unit centralized setting connector 377 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller el 61 1 Check on connector of fan motor Power supply cable 1 Turn OFF the power supply Measure the resistance between phases of U V W at the motor side connectors three core wire to check that the values are balanced and there is no short circuiting while connector or relay connector is disconnected Red U Measure the resistance White v values between phases U V W Black w 378 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 6 rd Check on connector of fan motor Signal cable 1 Turn OFF the power supply 2 Measure the resistance between Vcc and each phase of U V W and GND and each phase at the motor side connectors five core wire to check that the values are balanced within the range of 20 96 while connector or relay connector is disconnected Furthermore to use a multiple meter for measurement connect the probe of negative pole to Vcc and that of positive pole to GND 5 Gray 4 Pink 3 Orange 2 Blue 1 Yellow QU DOO GND Vcc Ww v a Me
67. outdoor unit main PCB gt Replace the outdoor unit main PCB Refer to P 354 199 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Lo Applicable Models VRVIII Q Series Method of Error Detection Detect error by current value during waveform output before compressor startup Detect error by current sensor value during synchronized operation at the time of startup Error Decision Conditions W When overcurrent is detected at the time of waveform output before operating the compressor W When the current sensor error during synchronized operation W When overvoltage occurs in IPM Supposed Causes W Defective outdoor unit PCB IPM failure Current sensor failure Defective drive circuit 200 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power supply once and turn ON again Does the power supply normally come back ON YES gt It is supposed that the error results from external causes other than failures e g exogenous noises or Check if the power thunder tr
68. 1 H7 09 Fan motor 1 signal error Slave 2 H7 10 Fan motor 2 signal error Slave 2 H9 01 Faulty outdoor air thermistor Refer to the H9 flow chart of Master each manual and make a n diagnosis of the relevant unit H9 02 Faulty outdoor air thermistor based omthie Enorcode shown Slave 1 to the left H9 03 Faulty outdoor air thermistor Slave 2 42 01 Faulty current sensor Refer to the J2 flow chart of Master STD compressor 1 each manual and make a Master STD compressor 2 based on the Error code shown 42 03 Faulty current sensor Slave to the left 1 STD compressor 1 J2 04 Faulty current sensor Slave 1 STD compressor 2 J2 05 Faulty current sensor Slave 2 STD compressor 1 J2 06 Faulty current sensor Slave 2 STD compressor 2 42 07 Current sensor error System 40 http splitoff ru tehn doc html Troubleshooting by Remote Controller Error code Troub eshooting Description of error Description of diagnosis J3 01 J3 02 J3 03 J3 04 J3 05 J3 06 J3 07 J3 08 J3 09 Faulty discharge pipe thermistor 1 Master INV compressor Faulty discharge pipe thermistor 2 Master STD compressor 1 Faulty discharge pipe thermistor 3 Master STD compressor 2 Faulty discharge pipe thermistor 1 Slave 1 INV compressor
69. 159 10S Or 7221 792 3X4 moj ed pejunoy 1821 708 79 709 Wr zej 79 702 9 1 pejunow 6 JoquiAs SHUN http splitoff ru tehn doc html VRV Series 2 R 410A 2 1 VRVII M A Series Wor Wrr Wor woe Wre woe 9 Wel W9L WOL we nte VINgE WOE We VINCE VINOE VWOZ V8 VINOL VINZL VINOL VIN8 VINS DIL Wor vse vgs VINZE VINOE VINSZ 314 dung 34A VWvz VINZZ VINOZ VOL VAL VINZL VINOL VWs VS m wool x uoyosuuog LA VWSZL wool WALZ onx4 adh pepuedsns wweg VINOS WWor VINSZ VINO ONX4 9 1 100 4 z wweg VINOS WWor
70. Address Duplication of Centralized Remote Controller Remote Controller Display we Lu Applicable Models All indoor models Centralized remote controller Method of Error Detection The principal indoor unit detects the same address as that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes W Address duplication of centralized remote controller W Defective indoor unit PCB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged The centralized address gt Make setting is duplicated change so that the centralized address will not be duplicated 335 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 69 UE Transmission Error between Centralized Remote Controller and Indoor Unit Remote Controller Display LI Applicable Models All indoor models intelligent Touch Controller Centralized remote controller Schedule timer Method of Error Detection Micro computer checks if transmission between indoor unit and centralized remote controller is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Transmission error between op
71. Display Applicable Models FXD Q Method of Error Detection This error is detected if there is no revolutions detection signal output from the fan motor Error Decision Conditions When no revolutions can be detected even at the maximum output voltage to the fan Supposed Causes W Defective indoor fan motor Broken wires W Defective contact 55 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting A Caution Is the connector securely connected power of approx 12VDC supplied between the Pins1 and 3 when the connector is disconnected and the power upply turns ON NO NO Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES gt Properly connect the connectors At this time check for any defective connector contact or broken wires Check the indoor unit fan motor and the wiring circuits of the fan motor gt Replace the indoor unit PCB 56 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 6 45 Overload Overcurrent Lock of Indoor Unit Fan Motor Remote Controller Display Applicable Models R 22 FXM40 125L R 410A FXMQ50 140P Method of Error Detection Detectio
72. Display um Applicable Models VRVII 11 5 WII and WIII Series Method of Error Detection Error is detected from the pressure detected by the high pressure sensor Error Decision Conditions When the discharge pipe pressure sensor is short circuit or open circuit Supposed Causes W Defective high pressure sensor system W Connection of low pressure sensor with wrong connection W Defective outdoor outside unit PCB 185 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged The high pressure sensor is connected NO Connect the high to outdoor outside unit PCB The relationship between the 1 VH and high pressure is normal 2 when voltage is YES pressure sensor and turn ON again Replace the measured between connector pins 1 and 3 of outdoor outside unit PCB 1 outdoor outside unit PCB gt Replace the high pressure sensor 186 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 1 Voltage measurement point Outdoor outside 5 Connector for unit PCB high p
73. Does the voltage between terminals P and N gradually rise to 283VDC after turning ON NO gt Replace the inverter PCB voltage between the P and N terminals is 400VDC and 190VDC or more when the NO gt Replace the inverter PCB Is 220V applied at LB and NB on the noise filter PCB YES Replace the inverter PCB 281 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Is 200V at the connector of outdoor unit PCB side NO gt Monitor field power supply gt Check the transmission wiring between the outdoor unit PCB and inverter unit 282 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 61 3 Check Operation is not Executed Remote Controller Display 2 LI zi Applicable Models All outdoor unit series Method of Error Detection Check operation is executed or not executed Error Decision Conditions Error is decided when the unit starts operation without check operation Supposed Causes W Check operation is not executed 283 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be
74. ESOS eas based on the Error code shown error Slave 1 to the left L8 07 INV compressor instantaneous overcurrent error Slave 2 L9 01 INV compressor startup Refer to the L9 flow chart of failure Master each manual and make a 19 05 INV compressor startup diagnosis of the relevant failure Slave 1 compressor of the relevant unit based on the Error code shown L9 06 INV compressor startup to the left failure Slave 2 LC 01 Transmission error between Refer to the LC1 flow chart of INV PCB and main PCB each manual and make a Master diagnosis of the relevant unit LC 06 Transmission error between eine fhe Error code shown INV PCB and main PCB o He ett Slave 1 LC 08 Transmission error between INV PCB and main PCB Slave 2 P1 01 Unbalanced power supply Refer to the P1 flow chart of voltage Master each manual and make a E diagnosis of the relevant unit s a supply based on the Error code shown to the left P1 03 Unbalanced power supply voltage Slave 2 PJ 04 Faulty combination of INV Refer to the PJ flow chart of PCB Master each manual and make a _ nat diagnosis of the relevant unit based the Error code shown to the left PJ 06 Faulty combination of INV PCB Slave 2 UO 03 Gas shortage alarm Refer to the UO flow chart 44 http splitoff ru tehn doc html Troubl
75. Method of Error Detection Fin temperature is detected by the thermistor of the radiation fin Error Decision Conditions When the temperature of the inverter radiation fin increases 96 or more Supposed Causes Actuation of fin thermal Defective inverter PCB W Defective radiation fin thermistor http splitoff ru tehn doc html 205 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Temperature YES m Defective power iin 96 unit radiation mu e Intake port is clogged e Radiation fin is dirty Measure the resistance e Outdoor air _ of the radiation fin temperature is thermistor high Resistance Ab Check of the radiation norma fin thermistor gt Replace the CHECK 11 thermistor Normal cue c reset NO ible Replace the possible inverter PCB YES Reset and operate the unit Refer to P 369 206 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 51 5 Momentary Overcurrent of Inverter Compressor Remote Controller Display ec b Applicable Models VRVIII Series Method of Error Detection Error is detected from
76. capacity setting adaptor and the memory inside the IC memory on the indoor unit PCB and whether the value is normal or abnormal is determined Error Decision Conditions When the capacity code is not saved to the PCB and the capacity setting adaptor is not connected When a capacity that does not exist for that unit is set Supposed Causes W The capacity setting adaptor was not installed W Defective indoor unit PCB 73 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged The indoor unit NO PCB was replaced gt Replace the with a spare indoor unit PCB PCB YES The capacity setting adaptor need to be installed when replacing the PCB NO gt Replace the indoor unit PCB gt Install a capacity setting adaptor 74 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 12 i Transmission Error between Indoor unit PCB and Fan PCB Remote Controller Display Ld Applicable Models FXMQ20 140P Method of Error Detection Check the condition of transmission between indoor unit PCB and fan PCB using micro computer Error Decision Conditions Whe
77. current flowing in the power transistor Error Decision Conditions When an excessive current flows in the power transistor Instantaneous overcurrent also causes activation Supposed Causes W Defective compressor coil disconnected defective insulation W Compressor startup error mechanical lock W Defective inverter PCB 207 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Compressor inspection Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution Power OFF may be damaged Is NO the stop valve Open the stop open valve Check if the compressor lead wires are normal YES Replace the compressor lead wires Check if the wiring and connection to the compressor are normal Correct the wiring and connection Insulation resistance of the compressor is 100 kO or below Replace the inverter compressor Compressor coils are disconnected Replace the inverter compressor 4 Check if the power transistor is normal Replace the inverter PCB 208 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Failure occurs again after restarting the unit YES
78. damaged power supply cable of the indoor NO unit fan properly connected Restart the fan motor Is the fan normally YES gt Properly connect the cable gt It is supposed running that the indoor unit fan motor stops running due to overload overcurrent or lock Y Replace the indoor unit PCB 62 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 7 5 Swing Flap Motor M1S Abnormality Remote Controller Display ce ng Applicable Models R 22 FXC FXA FXF FXH FXK R 410A FXCQ FXHQ FXKQ FXUQ Method of Error Detection Utilizes ON OFF of the limit switch when the motor turns Error Decision Conditions When ON OFF of the micro switch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time about 30 seconds Error code is displayed but the system operates continuously Supposed Causes W Defective swing motor Defective connection cable power supply and limit switch W Defective airflow direction adjusting flap cam W Defective indoor unit PCB 63 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or dis
79. filter W External factor Noise etc 231 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged between the outdoor unit main NO PCB fan drive PCB and inverter PCB connected securely transmission wiring between the outdoor unit PCB YES Connect transmission wiring and turn ON again gt Fix the fan drive board and inverter unit is disconnected The micro computer monitor NO disconnection and turn ON again green on fan drive board is blinking The micro computer monitor YES gt Check connection of the connector gt Defective green on the inverter PCB is blinking outdoor unit main PCB or defective inverter PCB 232 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller The voltage between red and white of connector on the inverter unit is 220 240 V YES gt Replace the inverter PCB When the LC error occur again replace the control PCB Check the noise filter for disconnection and check the power supply wiring o
80. minimum level low pressure cannot be 1 1 i T maintained To maintain low pressure frequency drops due to the capacity control 361 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Heating The opening degree of the outdoor unit electronic expansion valve becomes larger The outdoor unit electronic expansion valve fully opens and frequency increases Discharge pipe or low pressure drooping control 1 Frequency comes to the minimum level High pressure i High pressure 15 maintained at ia constant ilevel pes EE Frequency To maintain low pressure frequency drops due to the capacity control Frequency drops due to the drooping i control Degree of refrigerant shortage Higher degree of Proper amount shortage 362 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Vacuuming and dehydration procedure Conduct vacuuming and dehydration in the piping system following the procedure for Normal vacuuming and dehydration described below Furthermore if moisture may get mixed in the piping system follow the procedure for Special vacuuming and dehydration described below Normal
81. not responsible 238 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 56 74 Inverter Radiation Fin Thermistor Abnormality Remote Controller Display F3 Applicable Models VRVIII 111 5 and Series Method of Error Detection Resistance of radiation fin thermistor is detected when the compressor is not operating Error Decision Conditions When the resistance value of thermistor becomes a value equivalent to open circuited or short circuited status Error is not decided while the unit operation is continued 4 will be displayed by pressing the INSPECTION button Supposed Causes W Defective radiation fin thermistor Defective inverter PCB W Defective inverter compressor W Defective fan motor 239 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged Measure resistance value of the radiation fin thermistor 11 Disconnect the connector from the radiation fin thermistor and then check the thermistor Is the thermistor NO zie i resistance value Replace the normal inverter PCB The IN
82. opened 341 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Are the NO stop valves opened Open the stop valve YES Is the check operation carried out Is indoor outdoor and YES outdoor outdoor unit Replace the transmission wiring normal indoor unit PCB outdoor and outdoor outdoor unit transmission wiring normal After fixing incorrect wiring press and hold the RESET button on the outdoor unit main PCB for 5 Seconds The unit will not run for up to 12 minutes Wiring check operation may not have been carried out successfullv n Note Wiring check operation may not be successful if carried out after the outdoor unit has been OFF for more than 12 hours or if it is not carried out after running all connected indoor units in the fan mode for at least an hour 342 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 71 System Abnormality Refrigerant System Address Undefined Remote Controller Display n on Applicable Models All indoor models All outdoor unit series Method of Er
83. piping W Defective pressure sensor W Defective outdoor unit PCB W Defective thermistor 256 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged YES Shortage of refrigerant closing of stop valve or refrigerant System is clogged Requires check of refrigerant connector pins system 2 and 3 on main outdoor unit PCB is 0 8 VDC or less Low pressure sensor output voltage 12 YES Replace the main outdoor unit PCB Replace the low Suction pipe pressure temperature YES senso minus coil temperature gt Shortage of gas is 20 C or or refrigerant system is clogged Requires check of refrigerant system higher 257 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Resistance measured with the Suction pipe thermistor and heat exchanger thermistor disconnected from the outdoor unit PCB 11 gt Replace the thermistor Replace the outdoor unit PCB Refer to P 369 Refer to P 372 258
84. refrigerant using suction pipe temperature and subcooling heat exchanger outlet temperature during check operation Error Decision Conditions When the suction pipe temperature and the subcooling heat exchanger outlet temperature during check operation drop and become below the evaporation temperature Supposed Causes W Excessive refrigerant charging Suction pipe thermistor removed W Subcooling heat exchanger outlet thermistor removed 145 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the mounting condition of the suction pipe thermistor and the subcooling heat exchanger outlet thermistor temperature sensor mounted to piping Is the thermistor NO mounted properly g Mount me properly before operation Remove the suction pipe thermistor and the subcooling heat exchanger outlet thermistor from the outside unit PCB and measure the resistance with a tester Does it NO function normally gt Replace the thermistor if it functions abnormally before operation Carry out check operation again Does the NO error code i repeat YES gt Continue the operation e There is a possibility that
85. ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check connectors for connection outdoor unit PCB then measure the resistance using a tester NO Connect Remove thermistor from Normal YES NO correctly Replace the thermistor Replace the outdoor unit control PCB http splitoff ru tehn doc html 179 Troubleshooting by Indication on the Remote Controller 3 44 25 Subcooling Heat Exchanger Gas Pipe Thermistor Abnormality Remote Controller Display 12 Applicable Models All outdoor unit series Method of Error Detection Error is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor Error Decision Conditions When the subcooling heat exchanger gas pipe thermistor is short circuited or open circuited Supposed Causes W Defective subcooling heat exchanger gas pipe thermistor W Defective outdoor unit PCB 180 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Cauti
86. setting ON by service mode compressor 217 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Inverter output voltage check Inverter output voltage is not balanced Normal if within x10V for Y1 YL power supply and 5V for TL power supply Must be measured NO Replace the inverter PCB is stable After turning ON NO again 5 blinks gt Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the compressor Higher voltage than actual is displayed when the inverter output voltage is checked by tester 218 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 53 9 Inverter Compressor Startup Failure Remote Controller Display c Applicable Models VRVIII Series Method of Error Detection Detect the failure based on the signal waveform of the compressor Error Decision Conditions Starting the compressor does not complete Supposed Causes Stop valve is not opened Defective compressor W Wiring connection error to the compressor W large pressure difference before starting the compressor Defective inverter PCB 219
87. sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Has the check operation performed on outdoor unit PCB NO gt Press and hold BS4 on the outdoor unit main PCB for 5 seconds or more or turn ON the field setting mode 2 3 to conduct a check operation gt Performs the check operation again and completes the check operation When a leakage detection function is needed normal operation of charging refrigerant must be completed And then start once again and complete a check operation 284 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 62 Transmission Error between Indoor Units and Outdoor Units Remote Controller Display nu LI Applicable Models All indoor models VRVIII Series Method of Error Detection Micro computer checks if transmission between indoor and outdoor units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes W Indoor to outdoor outdoor to outdoor transmission wiring F1 F2 disconnection short circuit or wrong wiring W Outdoor unit power supply is OFF System address does not match Defective indoor unit PCB Defective outdoor unit PCB 285
88. system small quantity of from the stops refrigerant is fed to System even indoor units in the though it Stopped state when stops other indoor units are in operation 19 The system The system is Thereasonisthat Change the does not cool dry operation the dry operation system to cooling air well serves not to operation 17 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 Troubleshooting by Remote Controller 2 1 The INSPECTION TEST Button The following modes can be selected by using the Inspection Test Operation button on the remote control Service data can be obtained Error code history Temperature data of various sections Service settings can be made Forced fan ON Airflow direction Airflow rate setting Indoor unit settings can be made Filter sign time e Airflow direction 2821655 Inspection Test Operation Others button for more than 4 Field seconds Sani setting eMe mode Depress Press Inspection Test Operation Inspection Test Operation button for more than 4 button once seconds oe Normal Inspection Test Operation mode Press button once Inspection Test Operation button once Or after 30 minutes After 10 seconds Test operation Press mode Inspection Test Operation button once Followi
89. the insulation resistance The insulation resistance is low 1 not more than 1MQ YES Replace the fan motor Replace the fan driver NO 273 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check the inverter power transistor Power OFF Has the power transistor got faulty YES NO Y Check the fan driver power transistor Has the power transistor got faulty YES Replace the outdoor unit main PCB Observe the conditions of the PCB In the case of a serious failure a compressor failure may cause the failure of the PCB Even if the PCB is replaced it may cause failure again To avoid that recheck the compressor for ground and for any broken wires Furthermore even after the completion of PCB replacement check the compressor Replace the outdoor unit main PCB Observe the conditions of the PCB 274 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Has the main PCB caused damage Replace the outdoor unit main PCB lf the PCB replaced is badly damaged the compressor is likely to get defective To make sure recheck the compressor Power OFF
90. the Remote Controller Disconnect the outdoor outdoor unit transmission wiring to N YES create the one system Mount the DIII status and then NET expander check whether or adaptor not the Does ue error occur NO for all indoor units in gt Replace the the system indoor unit PCB ves gt Replace the outdoor unit PCB i Note 1 Check the correct wiring indoor outdoor and outdoor outdoor by Installation manual 2 What is Auto Address This is the address automatically assigned to indoor units and outdoor units after initial power supply upon installation or after executing rewiring Keep pressing the button for more than 4 seconds 345 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check for causes of rise in high pressure Referring to the Fault Tree Analysis FTA shown below probe the defective points Stop valve closed _ Local pressure High pipe Bent or rise resistance crashed pipe Clogging of In cooling If the outdoor unit electronic Defective expansion valve outdoor unit Defective i valve coil is throttled _ electronic 1 expansion
91. the electric characteristics normal lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Is the pressure value checked with the Service Checker corresponding to the measurement value of the pressure sensor 357 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Dirty evaporator lt Does the heat exchanger Degraded get clogged evaporating _ Decreased Defective lt Can the fan motor capacity fan output fan motor be rotated with Decreased hands airflow L Are the motor coil rate resistance and Defective insulation normal service monitor 4 PCB including capacity High setting Dirty fier lt Is air filter passage resistance clogged H Obstacles lt Is there any obstacle in the airflow passage n Note 2 Superheating temperature control in cooling is conducted by indoor unit electronic expansion valve Superheating temperature control in heating is conducted by outdoor unit electronic expansion valve EVM Guideline of superheated degree to judge as wet operation Suction gas superheated degree Not more than 3 C Discharge gas superheated degree Not more than 15 C except immediately after compressor starts up or is r
92. there are other causes of refrigerant overfilling V Refer to P 357 146 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRVII Series Method of Error Detection Refrigerant overcharge is detected from suction pipe and subcooling heat exchanger gas pipe temperature during check operation Error Decision Conditions When the suction pipe and subcooling heat exchanger gas pipe temperature is lower than evaporating temperature during check operation Supposed Causes Refrigerant overcharge Disconnection of the receiver gas pipe thermistor Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Are the suction pipe and subcooling heat NO exchanger gas pipe Install the thermistor installed thermistor on pipes correctly and subcooling heat NO exchanger gas pipe thermistor normal gt Replace the thermistor gt Refrigerant overcharged 147 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 32 13 High Pressure Switch System Abnormality Remote Controller Display io nz Applicable Models VRVIII Q Method of Er
93. unit 2 99 System Y Turn the power supply OFF Check if signal wire connector for the NO Ensure correct corresponding fan the connection motor is normal YES 151 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 1 Check the connector of the fan motor 1 Check if the resistance of the fan motor lead wire between Vcc and UVW and between GND and UVW are balanced Replace the fan motor gt Replace the inverter PCB e For fan motor 1 replace the inverter PCB e For fan motor 2 replace the fan inverter PCB Note 1 Check procedure for fan motor connector 1 Power OFF the fan motor 2 Remove the connector on the PCB to measure the following resistance value Judgement criteria resistance value between each phase is within 20 Connector for signal wires X2A 5Gray O GND 4 Pink Vec Measure the resistance between Vcc UVW and GND UVW 3 2Bue V 1Yelow O 152 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Ln Applicable Models VRVII Series Method of Error Detection Detection of abnormal signal from fan motor
94. unit and outdoor outside unit outdoor outside unit transmission wiring normal NO gt Fix the indoor outdoor outside unit transmission wiring Replace the outdoor outside unit PCB 297 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 63 45 Transmission Error between Remote Controller and Indoor Unit Remote Controller Display Liz Applicable Models All indoor models Method of Error Detection In case of controlling with 2 remote controller check the system using micro computer is signal transmission between indoor unit and remote controller main and sub is normal Error Decision Conditions Normal transmission does not continue for specified period Supposed Causes Indoor unit and remote controller transmission error W Connection of 2 main remote controllers when using 2 remote controllers Defective indoor unit PCB Defective remote controller PCB Defective transmission caused by noise 298 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Using 2 remote controllers control YES SS1 of both remo
95. valve body Defective low lt Are the electrical r pressure characteristics normal In heating Sensor und Defective Defective lt Check for the thermistor h ml suction pipe resistance and connection expansion control thermistor valve excessively Defective throttled service 4 monitor PCB 348 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller In cooling Low suction Short circuit air temperature of indoor unit Low room temperature Low suction air H temperature ofthe evaporator Defective suction air thermistor of indoor unit In heating Low suction air temperature of outdoor unit Defective outdoor air temperature thermistor of outdoor unit Abnormal piping length Bent or crashed pipe High pipe resistance Clogging of Less circulation quantity of refrigerant foreign materials Stop valve closed Inadequate refrigerant quantity Moisture choke Dirty evaporator Degradation L in condensing capacity lt Is the suction air temperature more than 14 C lt Is the room temperature less than 14 C lt Is the connector properly connected Are the thermis
96. 0 white mist Indoor unit Uneven Clean the inside comes out In cooling temperature of the indoor unit from the operation the distribution due to System ambient humidity heavy stain of the is high inside of the This indoor unit indoor unit is installed in a place with much oil or dust lt Indoor unit gt Hot gas Normal operation Immediately after refrigerant flown cooling operation stopping the ambient temperature and humidity are low in the indoor unit results to be vapor from the unit lt Indoor and outdoor units gt After the completion of defrosting operation the system is switched to heating operation Defrosted moisture turns to be vapor and comes out from the units Normal operation 15 http splitoff ru tehn doc html Symptom based Troubleshooting Symptom Supposed Cause Countermeasure 11 The system lt unit These are Normal operation produces Immediately after operating sounds This sound sounds turning ON the of the electronic becomes low power supply indoor expansion valve after a lapse of unit produces of the indoor unit approximately 1 ringing sounds minute Indoor and These sounds are Normal operation outdoor units produced from gas Hissing sounds are refrigerant continuously flowing produce
97. 096099 Go on to the Diagnosis Flow 6 Erroneous manual address settings of the slave units 1 and 2 301 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Y Check 3 Check 4 O 0e 0 90 O O Goon to the Diagnosis Flow 7 Connection of 4 or more outdoor units to Y the same Check 3 Check 4 circuit O e O0 90 O O O9 Goon tothe Diagnosis Flow 8 Defective auto address of the slave units 1 and 2 302 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 1 Check of error 3 Check of error 4 G20000000000000 connection error is detected in connecting wires with external control adaptor for outdoor YES gt Correct the connecting wiring with the external control adaptor for outdoor unit Check if the normal condition monitor LED for the outdoor unit PCB blinks Check if power is supplied to the outdoor units Supply the power to the outdoor unit Replace the outdoor unit main PCB
98. 76 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Confirm which thermistor is abnormal using outdoor unit monitor mode Is the connector for liquid pipe NO Connect the connector and turn ON again outdoor outside unit PCB Is the resistance measured after removing the thermistor from outdoor outside unit PCB normal 11 gt Replace the thermistor Replace the outdoor outside unit PCB Refer to P 369 177 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 43 28 Thermistor System Abnormality Remote Controller Display Applicable Models VRVIII Q Series Method of Error Detection Error is detected according to the temperature detected by each individual thermistor Error Decision Conditions When thermistor is disconnected or short circuited during operation Supposed Causes W Defective thermistor Defective connection of connector Defective outdoor unit PCB control PCB 178 http splitoff
99. Causes W Defective low pressure sensor system W Connection of high pressure sensor with wrong connection Defective outdoor outside unit PCB 191 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged The low pressure sensor is connected to outdoor outside unit PCB NO gt Connect low pressure sensor property and restart system The relationship between the 1 VH and low pressure is normal 2 when voltage is measured between connector pins 2 and 3 of outdoor outside unit PCB A1P 1 YES gt Replace the outdoor outside unit PCB A1P gt Replace the low pressure sensor 192 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Note 1 Voltage measurement point Outdoor outside sy Connector for unit PCB low pressure 5 Sensor o 4 Red GND Black a an no Micro computer x 2 White e A D input 1 o l else Measure voltage here Refer to P 372
100. Conditions When the outdoor air temperature sensor has short circuit or open circuit Supposed Causes W Defective outdoor air thermistor W Defective outdoor unit PCB 157 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Connector is NO Connect the connected to outdoor unit PCB Resistance is normal when measured after disconnecting the NO connector and turn ON again thermistor from the outdoor unit PCB 11 gt Replace the thermistor Replace the outdoor unit PCB The alarm indicator is displayed when the fan only is being used also NIIT TI Refer to P 369 158 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 35 Water System Error Remote Controller Display 10 1 nul Applicable Models VRV WII and WIII Series Method of Error Detection W Detect abnormalities using the thermistor on the side of the heat exchanger gas Detect turned OFF interlock circuit When interlock setting is provided Error Decision Conditions W When temperature on the heat exchanger gas side drops remarkably with
101. Defective Rise in valve valve body high H A temperature peu difference in excess of 10 C between the inlet and the aa d Defective high be abnormal pressure UNES sensor Defective high Defective F control Defective Contro 4 service monitor PCB Defective Defective indoor unit valve coil H electronic H expansion Defective valve valve body Defective high In heating r1 pressure If the indoor sensor unit electronic expansion Defective valve Defective indoor unit excessively control liquid pipe throttled thermistor 62 Defective service monitor lt Check to be sure the stop valve is open Conduct visual checks for pipe conditions lt Is there any temperature difference caused before and after the filter or branch pipe lt Are the coil resistance and insulation normal lt Are the electrical characteristics normal lt Is the pressure value checked with the Service Checker corresponding to the measurement value of the pressure sensor lt Are the coil resistance and insulation normal lt Are the electrical characteristics normal lt 15 the connector properly connected Are the thermistor resistance characteristics normal lt 15 the pressure value checked with the Service Checker corresponding to the measurement value of the pressure sensor 346 http spl
102. ES the inverter PCB when the compressor Recheck for the starts up power supply If there is no problem with the power supply replace the inverter PCB lf the PCB replaced is badly damaged compressor is likely to get defective To make sure recheck the compressor Check the harness and then replace it if necessary gt End of measures The error may temporarily result from onsite causes Causes Instantaneous power failure open phase noises or else The uz error recurs 265 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display uc Applicable Models VRVIII Q Series Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter PCB and power supply voltage Error Decision Conditions When the voltage aforementioned is not less than 190V Supposed Causes W Power supply insufficient Instantaneous power failure Open phase Defective inverter PCB Defective outdoor control PCB Defective compressor Defective main circuit wiring Defective fan motor Defective connection of signal cable 266 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting
103. FXKQ FXDQ FXMQ FXHQ FXUQ Method of Error Detection Water leakage is detected based on float switch ON OFF operation while the compressor is in non operation Error Decision Conditions When the float switch changes from ON to OFF while the compressor is in non operation Error code is displayed but the system operates continuously Supposed Causes W Humidifier unit optional accessory leaking W Defective drain piping upward slope etc W Defective indoor unit PCB 71 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Field drain piping has a defect such as YES upward sloping humidifier unit optional YES Modify the drain piping accessory is installed on the indoor unit gt Check if the humidifier unit is leaking gt Defective indoor unit PCB 72 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 11 7 Capacity Determination Device Abnormality Remote controller display eI nul Applicable Models All indoor models Method of Error Detection Capacity is determined according to resistance of the
104. JejoJjuo pue spun Joopu Sun Sce pue Joopu uoneulquio Jejojuo pue spun Joopu Sun bee pue WA d d W Wd VN v N Sjuejuo 10413 OMAYA IMAYNA AWAYA TAMA SHIIAHA 59095 cc jue1e8ujes 34 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 5 Error Codes Sub Codes If an error code like the one shown below is displayed when the navigation remote controller BRC1E61 or 71 is in use make a detailed diagnosis or a diagnosis of the relevant unit referring to the attached list of detailed error codes 2 5 1 Indoor Unit Error code Troub eshooting Description of error Description of diagnosis A6 01 A6 10 A6 11 Fan motor locked A locked fan motor current has been detected Turn the fan by hand to check for the connection of connectors Fan overcurrent error A fan motor overcurrent has been detected Check for the connection of the connector between the fan motor and the PCB for the fan If the connection is normal replace the fan motor If this still cannot solve the error replace the PCB for the fan Fan position detection error
105. Make measurement of DC voltage between these wires Refer to P 346 Refer to P 372 101 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 24 Actuation of Low Pressure Sensor Remote Controller Display DEO L1 Applicable Models VRVII and II S Series Method of Error Detection Error Decision Conditions Error is generated when the low pressure is dropped under specific pressure Supposed Causes W Abnormal drop of low pressure Defective low pressure sensor W Defective outdoor unit PCB W Stop valve is not opened 102 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged NO Is stop valve opened YES Low pressure at stop YES gt Open stop valve due to error is abnormal Measure the voltage VL of connector pin No 2 3 of YES gt Refrigerant shortage refrigerant System clogging wiring and piping wrong connection stop valve closed electronic expansion valve fully close error outdoor unit PCB 1 Is the relationship between low voltage and VL normal Replace the low pres
106. Method of Error Detection Error of fan motor system is detected according to the fan speed detected by hall IC when the fan motor runs Error Decision Conditions W When the fan runs with speed less than a specified one for 15 seconds or more when the fan motor running conditions are met W When connector detecting fan speed is disconnected W When error is generated 4 times the system shuts down Supposed Causes W Defective fan motor W The harness connector between fan motor and PCB is left in disconnected or defective connector W Fan does not run due to foreign matters tangled W Clearing condition Operate for 5 minutes normal 127 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Connector of fan motor is YES gt Connect the disconnected Harness connector between compressor inverter YES connector Connect the PCB and fan inverter PCB is disconnected YES harness connector Remove the there any obstacle around the fan Can the fan be turned smoothly with hand NO obstacle after disconnect the connector of fan motor Check on pulse input of position signal of fan inv
107. Method to check transmission part of indoor unit PCB Turn OFF the power and remove the connector of indoor unit PCB 2 Short circuit the connector 3 After turning ON the power check below numbers under field setting from remote controller Confirmation Second code No at the condition of first code No 21 on mode No 41 Determination 01 Normal Other than 01 Transmission error on indoor unit PCB After confirmation turn OFF the power take OFF the short circuit and connect the connector back to original condition 77 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 13 Thermistor for Liquid Pipe Abnormality Remote Controller Display Applicable Models All indoor models Method of Error Detection Error detection is carried out by temperature detected by liquid pipe thermistor Error Decision Conditions When the liquid pipe thermistor becomes disconnected or shorted while the unit is running Supposed Causes W Defective thermistor for liquid pipe W Defective indoor unit PCB 78 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Rem
108. Refer to the E3 flow chart of E3 02 activated Master each manual and make a diagnosis of the relevant unit E3 03 High pressure switch E3 04 activated Slave 1 based on the Error code shown to the left E3 05 High pressure switch E3 06 activated Slave 2 07 High pressure switch activated Batch E4 01 Low pressure error Master Refer to the E4 flow chart of 4 02 Low pressure error Slave 1 each manual and makea diagnosis of the relevant unit E4 03 Low pressure error Slave 2 based on the Error code shown to the left E5 01 INV compressor lock Refer to the E5 flow chart of Master each manual and make a _ diagnosis of the relevant unit E5 02 INV compressor lock Slave 1 based onthe Error code shown E5 03 INV compressor lock Slave 2 to the left 01 STD compressor 1 OC Refer to the E6 flow chart of activated Master each manual and make a E6 02 STD compressor 2 OC diagnosis of the relevant F compressor of the relevant unit activated Masten based on the Error code shown E6 03 STD compressor 1 to the left activated Slave 1 E6 04 STD compressor 2 OC activated Slave 1 E6 05 STD compressor 1 OC activated Slave 2 E6 06 STD compressor 2 OC activated Slave 2 38 http splitoff ru tehn doc html Troubleshooting by Remote Controller
109. Replace the magnetic contact switch YES and gradually rise to 556 VDC YL or 283 VDC TL after turning on gt Replace the inverter PCB Is 220 240 V at the connector of inverter YES gt Replace the inverter PCB Is 220 240 V at the connector of outdoor outside PCB side NO gt Replace the outdoor outside unit PCB gt Check the transmission wiring between the outdoor outside unit PCB and inverter unit 279 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display uc Applicable Models VRVII S Series Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Error Decision Conditions Supposed Causes W Power supply insufficient Instantaneous failure Defective inverter PCB Defective outdoor control PCB Defective main circuit wiring 280 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged Is connection wire connected NO between the connector Repair the wiring YES Turn ON again
110. Shortage Alert Remote Controller Display LI Applicable Models VRVIII 11 5 and Series Method of Error Detection Detect refrigerant shortage based on the temperature difference between low pressure or suction pipe and heat exchanger Error Decision Conditions In cooling mode Low pressure becomes 0 1MPa or below In heating mode The degree of superheat of suction gas becomes 20 C and over SH Ts1 Te Ts1 Suction pipe temperature detected by thermistor Te Low pressure equivalent saturation temperature Error is not determined The unit continues the operation Supposed Causes Refrigerant shortage or refrigerant clogging piping error W Defective thermistor W Defective low pressure sensor W Defective outdoor unit PCB 250 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged In cooling mode Set up a pressure gauge at the service port on the low pressure side 2 Reset the operation using the remote controller then restart Check if the low pressure is 0 1 MPa or below 1 Check if the property of low pressure sensor is normal 2 Replace the low pressure sensor Replace the main PCB gt Remo
111. V compressor s insulation resistance is not more than 100kQ YES gt Replace the compressor M1C The fan motor s insulation resistance is not more than 1MQ YES gt Replace the fan motor Does the error recur when the power supply turns ON YES gt Replace the inverter PCB gt Continue the operation Refer to P 369 240 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display cul Fog Applicable Models VRVII 11 5 WII and WIII Series Method of Error Detection Resistance of radiation fin thermistor is detected when the compressor is not operating Error Decision Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited status W Error is not decided while the unit operation is continued will be displayed by pressing the INSPECTION button Supposed Causes W Defective radiation fin thermistor W Defective inverter PCB 241 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Measure the resistance of radiation fi
112. VINcE VINSZ OTX4 adh Buipuels 20014 VINOS WWor VIWcE VINO Ovx4 adh pejunow VINOOL vweg OHX4 ed pepuedsns vnez VINOOL VINOS VINEO VINOS OWX4 ed yong peiunow ullao wg wool INEO WOS Wor wez woz OSX4 adh uping pejunow 9 NOS 7 7 VNE9 VNOS ynze VNSZ VNOZ SAVN OGX4 de 52 13 S 99 VINE9 ynze OMX4 eu Buleo wg woo WOS weg WOS wez O4X4 HNN pauno WS 08 weg wos Wor woz OOX4 on ayesse payunoyy Bulao Joqwis OWEN spun Joopu http splitoff ru tehn doc html VRV Series 2 2 VRVII S M Series VVA wo WS Wr OWAXH adky m gt weg wos Wor woz ONX4 ed 5 100 4 i Wea 09 Wor
113. VW and GND Put the power supply ON to check the following LED lamps 1 HAP lamp on the compressor PCB 2 HAP lamp on the fan inverter PCB does not blink on the Replace the corresponding fan motor condition but the HAP lamp on the compressor PCB is blinking gt Replace the fan inverter PCB gt Replace the fan NITET Refer to P 378 NITE Refer to P 379 motor 2 120 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRVIII S Series Method of Error Detection Detect an error based on the current value in the inverter PCB as for motor 2 current value in the fan PCB Detect an error for the fan motor circuit based on the number of rotation detected by hole IC during the fan motor operation Error Decision Conditions Overcurrent is detected for inverter PCB or fan inverter PCB W n the condition of fan motor rotation the number of rotation is below the fixed number for more than 6 seconds Supposed Causes W Defective fan motor W Defect or connect ion error of the connectors harness between the fan motor and PCB W The fan can not rotate due to any foreign substances entangled W Clear condition Continue normal operation for 5 minutes 121
114. Voltage Abnormality Remote Controller Display ul Applicable Models FXMQ20 140P Method of Error Detection Detect error checking the input voltage of fan motor Error Decision Conditions When the input voltage of fan motor is 150V or less or 386V or more Supposed Causes W Defective power supply voltage W Defective connection on signal line W Defective wiring W instantaneous blackout others 66 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the condition of the power supply Check if power supply voltage is 220 240V 10 2 Check if there is power open phase or defective wiring 3 Check if power supply voltage unbalance is within 6V There are problems on the condition of power supply described b YES gt Correct any fault YES H Reoccurrence gt Check and of error correct each wiring gt It is possible to have external factor such as brownout and instantaneous blackout 67 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 9 5 S5Electronic Expansion Valve Coil Abnorma
115. W When error is generated 4 times the system shuts down Supposed Causes W Defective fan motor W The harness connector between fan motor and PCB is left in disconnected or defective connector W Fan does not run due to foreign matters tangled W Clearing condition Operate for 5 minutes normal 125 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Connector of YES Connect the fan motor is disconnected Is there any obstacle YES connector Remove the around the fan fan be turned smoothly with NO obstacle hand after disconnect Check on connector of fan motor Power supply cable Check on pulse input of position signal of fan inverter PCB Is the pulse NO Replace the fan motor of outdoor unit inputted YES gt Replace the fan motor of outdoor unit NITET Refer to P 378 NITE Refer to P 379 gt Replace the outdoor unit PCB 126 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRVII Series
116. When replacing the N PCB were field setting WY gt Correct the field settings Is the type of PCB correct Replace with a 1 correct PCB YES Reset and then restart n Note 1 Type of PCB mismatching includes Main PCB Inverter PCB for compressor Fan driver PCB 248 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display ma ru Applicable Models VRVII S Series Method of Error Detection Check the communication state between inverter PCB and control PCB by micro computer Error Decision Conditions When the communication data about inverter PCB type is incorrect Supposed Causes Mismatching of inverter PCB W Defective field setting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Was the NO PCB replaced gt Replace the PCB Is the PCB type correct NO gt Replace the PCB by the correct one Is the field setting when the PCB was replaced correct NO gt Correct field setting gt After resetting restart 249 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 58 ut Refrigerant
117. and check that each phase are balanced within a permissible dispersion range of 20 2 Measurement of signal wire connector Remove the connector and measure the resistance between GND and Vcc Hw Hv or Hu terminals of the motor connector with five core wire Connector power wire use Connector signal wire use 5Red U 5 Gray GND 4 4 Pink 3Whie V 3 Orange Hw 2 Q 2 Blue Hv 1 w 1 Yellow Hu 60 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models R 22 FXM200 250L R 410A FXMQ MA Method of Error Detection This error is detected by detecting that the individual power supply for the fan turns OFF Error Decision Conditions When it is not detected that the individual power supply for the indoor unit fan turns ON while in operation Supposed Causes W Defective power supply for the indoor unit fan motor W Clogged drain piping Actuation of the indoor unit safety device W Defective contact in the fan wiring circuit 61 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be
118. and see whether compressor is short circuited or ground Replace the compressor Are inverter output voltages the same for 3 phases NO gt Replace the outdoor unit inverter PCB Does low or high pressure vary even instantaneously when restarting compressor Replace the compressor 108 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRVIII 11 5 and Series Method of Error Detection Inverter PCB takes the position signal from UVW line connected between the inverter and compressor and the error is detected when any abnormality is observed in the phase current waveform Error Decision Conditions This error will be output when the inverter compressor motor does not start up even in forced startup mode Supposed Causes W inverter compressor lock High differential pressure Incorrect UVW wiring Defective inverter PCB Stop valve is not opened 109 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Local factor Open the stop valve relay wires to the compresso
119. ansistor is normal Is the insulation resistance of the compressor 100kQ or more Replace the compressor and compressor inverter PCB at the same time Replace the inverter PCB Check if the power transistor of the fan driver is normal NO Replace the compressor inverter PCB and fan inverter PCB gt Replace the inverter PCB Refer to P 354 201 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 50 Inverter Radiation Fin Temperature Rise Abnormality Remote Controller Display a Lo Applicable Models VRVIII Series Method of Error Detection Fin temperature is detected by the thermistor of the radiation fin Error Decision Conditions When the temperature of the inverter radiation fin increases 82 or more Supposed Causes Actuation of radiation fin thermal W Defective inverter PCB W Defective radiation fin thermistor 202 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged The radiation fin of the inverter PCB concerned exceeded a temperature of 82 C YES g
120. asure the resistance values between Vcc and U V W and GND and U V W 379 http splitoff ru tehn doc html Warning Daikin products are manufactured for export to numerous countries throughout the world Prior to purchase please confirm with your local authorised importer distributor and or retailer whether this product conforms to the applicable standards and is suitable for use in the region where the product will be used This statement does not purport to exclude restrict or modify the application of any local legislation Aska qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electrical shock fire or explosion Use only those parts and accessories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical Shock fire or explosion Readthe User s Manual carefully before using this product The User s Manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any enquiries please contact your local importer distributor and or retailer Cautions on product corrosion 1 Air condit
121. ate the unit again Replace the current sensor or outdoor unit PCB 166 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display uc Applicable Models VRVII Series Method of Error Detection Error is detected according to the current value detected by current sensor Error Decision Conditions When the current value detected by current sensor becomes 5A or lower or 40A or more during standard compressor operation Supposed Causes W Defective current sensor Defective outdoor unit PCB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is the connector for current sensor connected to outdoor unit PCB Connect the connector and operate unit again Is the current sensor NO mounted on the T Mount the current sensor correctly and operate unit again phase wire Replace the current sensor and outdoor unit PCB 167 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 38 23 Discharge Pipe Thermistor Abnormality Remote Controller Display 12 Applicable Models All outdoor unit series Method of Error Detection Error is detecte
122. by hand after the fan NO motor connector of the gt Replace the fan fan PCB is motor removed YES 58 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller between the power wire terminals of the fan motor and YES gt Replace the fan motor Remove the power wire connector from the fan motor and measure the resistance between U and V V and W and W and U phases 1 The resistors among U V and W are unbalanced or short circuited NO gt Replace the fan motor Remove the signal connector from the fan motor and check the resistance 2 Between Vcc and GND terminals and between GND and Hw Hv or Hu terminals are short circuited YES Replace the fan motor Turn ON the power 59 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller HAP lamp of the indoor PCB YES blinks and the HAP lamp of the fan PCB is OFF Replace the fan PCB n Note Replace the fan motor 1 Measurement of power wire connector Remove the connector from the fan PCB and measure the resistance between the U and V V and W and W and U phases of the motor connector with five core wire
123. ce characteristics normal superheated Defective degree service control monitor PCB Defective _ Defective lt Are the coil resistance and outdoor unit valve coil insulation normal jH electronic H In heating expansion Defective If the outdoor valve valve body unit electronic n expansion Defective low Are the electric valve pressure characteristics normal excessively gensor throttled Defective lt Is the connector properly 4 suction pipe connected thermistor Are the thermistor resistance characteristics normal Defective lt Is the pressure value service checked with the Service monitor Checker corresponding to the measurement value of the pressure sensor H Refrigerant shortage lt Refer to CHECK 12 O High pipe Abnormal piping length lt Does the piping length fall resistance in the permissible range Bent or crashed pipe Conduct visual checks Including moisture lt Eliminate moisture by choke vacuum operation Refer to Check 13 Stop valve closed lt Check if the stop valve is open 352 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller B Note Refer to Low pressure protection control for hot gas bypass control Refer to Subcooling electronic expansion valve control Superheating temperature control in cooling is
124. ck operation exceeds the criteria Supposed Causes Refrigerant overcharge Disconnection of outdoor air thermistor Disconnection of heat exchanger deicer thermistor W Defective liquid pipe thermistor 143 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the mounting condition of the outdoor air thermistor heat exchanger deicer thermistor and liquid pipe thermistor in the piping the above NO thermistor installed Install the on pipes thermistor correctly correctly Remove the outdoor air thermistor heat exchanger deicer thermistor and the liquid pipe thermistor from the outdoor unit PCB and measure resistance with a tester Is the characteristic of the above thermistor normal NO gt Replace the thermistor gt Rectify the overcharge of refrigerant NIIT TI Refer to P 369 144 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRV WII and WIII Series Method of Error Detection Detect excessive charging of
125. conducted by indoor unit electronic expansion valve Superheating temperature control in heating is conducted by outdoor unit electronic expansion valve EVM 5 Judgement criteria of superheat operation D Suction gas superheated degree 10 C and over 2 Discharge gas superheated degree 45 C and over except immediately after compressor starts up or is running under drooping control Use the above values as a guide Depending on the other conditions the unit may be normal despite the values within the above range 353 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 5 Power Transistor Check Perform the following procedures prior to check 1 Power OFF 2 Remove all the wiring connected to the PCB where power transistors are mounted on Preparation Multiple Prepare the analog tester C12 type of multiple tester ot For the digital type of If fo multiple tester those with diode check function are available for the checking Point of Measurement and Judgement Criteria Turn OFF the power supply Then after a lapse of 10 minutes or more make measurement of resistance When using the analog type of multiple tester make measurement in resistance measurement mode in the x1kQ range Measuring dtd No point
126. connecting connectors or parts Caution may be damaged Is power NO supply 220 240V Provide provided 220 240V power supply YES Indoor gt Replace the indoor unit PCB Swing motor works when the power supply is turned OFF and then back ON YES The connector is connected to the indoor unit PCB NO Connect the connector and turn ON again The limit Switch functions normally Replace the swing motor relay cable is short circuited or Replace the limit disconnected Switch relay cable then stopping with the remote of the indoor unit PCB is Replace the 220 240 VAC 60 Hz when turned ON again within 30 seconds of turning ON again indoor unit PCB 64 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller The relay cable has Replace the no continuity power supply relay cable direction flap cam mechanism is disconnected from the NO gt Replace the swing motor operation swing motor is normal when turned ON again gt Take the flap cam mechanism apart reassemble and turn ON again http splitoff ru tehn doc html 65 Troubleshooting by Indication on the Remote Controller 3 8 5 Power Supply
127. contact switch ON The voltage between the P2 or P3 and N3 terminals is 320 VDC Y1 YL or more and 190 VDC TL or less when the compressor is running NO gt Replace the inverter PCB gt Monitor field power supply 270 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller of power reaching YES ihe magnetic contact switch coil terminals P2 or P3 and gradually rise to YES gt Replace the magnetic contact switch 556 V C Y1 YL or 283 VDC TL 240 V at the YES gt Replace the inverter PCB connector inverter 15 220 240 V the connector NO gt Replace the inverter PCB outside PCB side Replace the outside unit PCB Check the transmission wiring between the outside unit PCB and inverter unit 271 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display uc Applicable Models VRVIII S Series Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Error Decision Conditions When the voltage aforementioned is not less than 780V or not more than 320V or when the current limit
128. cooling the indoor unit electronic expansion valve is used for superheated degree control 4 n heating the outdoor unit electronic expansion valve EVM is used for superheated degree control of outdoor unit heat exchanger 350 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check the Factors of Overheat Operation Referring to the Fault Tree Analysis FTA shown below probe the defective points Temperature increase of discharge pipe Hot gas circuit clogging Defective H solenoid valve coil Defective Defective hot solenoid valve gas bypass H body control 1 Defective H service monitor PCB In cooling only Defective Defective Defective Defective subcooling valve coil discharge subcooling r electronic pipe electronic expansion Defective temperature expansion valve valve body control valve Defect control Defective A Eva control pressure 2 sensor Defective subcooling heat exchanger outlet thermistor Defective service monitor PCB Four way valve is in the middle Defective four position way valve operation Leak from hot gas bypass valve Superheat due to shaft Compr
129. d Normal if within x10V for Y1 YL power supply and 5V for TL power supply Must be measured when frequency is stable YES gt Replace the inverter unit 211 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller There is instantaneous power drop YES Correct the power supply Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the compressor Higher voltage than actual is displayed when the inverter output voltage is checked by tester 212 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 52 15 Momentary Overcurrent of Inverter Compressor Remote Controller Display 0 Lu Applicable Models VRVIII Series Method of Error Detection Error is detected by current flowing in the power transistor Error Decision Conditions When overload in the compressor is detected For 460V units 1 19 0A and over continues for 5 seconds 2 16 1A and over continues for 260 seconds For 230V units 1 A current of 33 5A or more continues for a period of consecutive 5 sec 2 A current of 27 6A or more continues for a period of consecutive 260 sec Supposed Causes Compressor overload
130. d of time Defective inverter PCB Power supply voltage error The inverter power supply voltage is high or low Power supply error Defective inverter PCB Imbalanced power supply Power supply voltages get significantly imbalanced among three phases Power supply error imbalanced voltages of 2 or more Defective inverter PCB Dead inverter PCB pe Transmission error between With the outdoor unit PCB no Broken wire in communication inverter PCB communications are line and service carried out across Defective service monitor PCB service monitor monitor PCB inverter PCB fan Defective inverter PCB PCB Defective fan PCB Any PCB of PCB of different mismatching specification different specification from that of the mounted product is connected 4 Defective The radiation fin Defective radiation fin thermistor gets short radiation fin thermistor circuited or open thermistor 366 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller ze I Concept of inverter related error codes Main Service monitor PCB i Power supply 8 phase 460VAC Weak current part Inverter PCB Heavy current L8 Transmission error When transmissions between the main PCB
131. d by current sensor becomes 5A or lower or 40A or more during standard compressor operation Supposed Causes W Defective current sensor W Defective outdoor unit PCB W Defective compressor 165 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting A Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged monitor mode O Check 4 shows as follows O Check 4 shows as follows Check the current sensor corresponding to the error code i2 in the o o o e e Current sensor for constant rate compressor 1 o o o e o gt Current sensor for constant rate compressor 2 Explanation for e Master unit Slave unit 1 Slave unit 2 eje eec System Is the connector for current sensor NO connected to outdoor Connect the d unit PCB connector and operate the unit again the current sensors inversely YES C connected to 2 STD 2 compressors between the current sensors and the STD compressors Applicable YES compressor coil wire Replace the is broken compressor NO sensor mounted on gt Mount the the T phase and R phase wire current sensor correctly and oper
132. d from the temperature detected by discharge pipe thermistor Error Decision Conditions When a short circuit or an open circuit in the discharge pipe thermistor is detected Supposed Causes W Defective thermistor for outdoor unit discharge pipe Defective outdoor unit PCB W Defective thermistor connection 168 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Confirm which discharge pipe thermistor is abnormal using outdoor unit monitor mode Connector is connected to outdoor unit PCB NO Connect the connector and turn ON again Resistance is normal when measured after disconnecting the thermistor from the outdoor unit PCB 11 gt Replace the thermistor Replace the outdoor unit PCB The alarm indicator is displayed when the fan is being used also TSE Refer to P 369 169 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 39 Heat Exchanger Gas Pipe Thermistor Abnormality Remote Controller Display nid L4 Applicable Models VRV WII and WIII Series Method of Error Detect
133. d while in respectively cooling or defrosting through the indoor operation and outdoor units Indoor and These sounds Normal operation outdoor units are produced Hissing sounds are when the gas produced refrigerant stops immediately after the or changes startup or stop of the flowing system or the startup or stop of defrosting operation lt Indoor unit gt These sounds Normal operation Faint sounds are are produced continuously from the drain produced while in discharge device cooling operation in operation or after stopping the operation lt Indoor unit gt These sounds Normal operation Creaking sounds are produced are produced from resin parts while in heating expanding and operation or after contracting with stopping the temperature operation changes lt Indoor unit gt On VRV systems Normal operation Sounds like these sounds are trickling or the produced when like are produced other indoor units from indoor units operation The in the stopped reason is that the state system runs in order to prevent oil or refrigerant from dwelling Outdoor unit The reason is that Normal operation Pitch of operating the compressor sounds changes changes the operating frequency 16 http splitoff ru tehn doc html Symptom based Troubleshooting fan does not rotate fan revolutions are controlled
134. dity sensor PCB assy and taking the steps 1 and 2 replace the indoor unit PCB assy 89 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 19 2 Room Temperature Thermistor in Remote Controller Abnormality Remote Controller Display Lu Applicable Models All indoor models Method of Error Detection Error detection is carried out by temperature detected by room temperature thermistor in remote controller Error Decision Conditions When the room temperature thermistor in remote controller becomes disconnected or shorted while the unit is running Error code is displayed but the system operates continuously Supposed Causes W Defective room temperature thermistor in remote controller Defective remote controller PCB 90 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Clear the error code history 1 While in inspection mode press and hold the ON OFF button for a period of 4 Seconds or more Is c displayed on the remote controller YES gt Replace the remote controller gt External factor other
135. e diagnosis of the relevant EQ 05 Electronic expansion valve 1 coil error Slave 1 electronic expansion valve of the E9 07 Electronic expansion valve 2 col error Slave 1 relevant unit based on the Error code shown to the left E9 08 Electronic expansion valve 1 coil error Slave 2 E9 10 Electronic expansion valve 2 coil error Slave 2 F3 01 Discharge pipe temperature Refer to the F3 flow chart of error Master each manual and make a _ diagnosis of the relevant unit F3 03 Discharge pipe temperature based on the Error code shown error Slave 1 to the left F3 05 Discharge pipe temperature 39 http splitoff ru tehn doc html Troubleshooting by Remote Controller Error Troubleshooting code Description of error Description of diagnosis F6 02 Excess refrigerant charge Excess refrigerant charge was error detected during test run F6 03 Excess refrigerant charge Excess refrigerant charge was warning detected during operation other than test run H7 01 Fan motor 1 signal error Refer to the H7 flow chart of Master each manual and make a diagnosis of the relevant unit based the Error code shown Master to the left H7 05 Fan motor 1 signal error Slave 1 H7 06 Fan motor 2 signal error Slave
136. e Controller mnm Note x1 2 The intelligent Touch Controller and the schedule timer are not available for combined use The intelligent Touch Controller centralized remote controller and the unified ON OFF controller have been set to Provided with the master unit centralized setting connector at the factory The schedule timer has been set to Not provided with the master unit centralized setting connector at the factory which is attached to the casing of the master unit 376 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Master Slave Unit Setting Table Combination of intelligent Touch Controller and Centralized Remote Controller 1 2 3 4 1 2 3 4 Master Master Master Master 1007415 Slave 890815 siave 1007435 siave 500815 siave CRC Master CRC Master CRC Slave CRC Slave 2 CRC Master CRC Slave intelligent intelligent Touch Master Touch Slave Controller Controller intelligent CRC Master Touch Slave Controller intelligent Touch Master CRC Slave Controller CRC Master intelligent Touch Master Controller n Note CRC Central remote controller lt DCS302CA61 gt intelligent Touch Controller lt
137. e Models VRVIII 111 5 and Series Method of Error Detection Error is detected from the temperature detected by the outdoor air thermistor Error Decision Conditions When the outdoor air thermistor has short circuit or open circuit Supposed Causes W Defective thermistor connection W Defective thermistor for outdoor air W Defective outdoor unit PCB 155 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Confirm which thermistor is abnormal using outdoor unit monitor mode Connector is NO connected to outdoor unit PCB Resistance is normal when measured after disconnecting the NO Connect the connector and turn ON again thermistor from the outdoor unit PCB gt Replace the thermistor NIIT TI Refer to P 369 gt Replace the outdoor unit PCB 156 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Lui mo Applicable Models VRVII and 1 5 Series Method of Error Detection The abnormal detection is based on current detected by current sensor Error Decision
138. e Remote Controller 3 60 Power Supply Insufficient or Instantaneous Error Remote Controller Display uc Applicable Models VRVIII Series Method of Error Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Error Decision Conditions When the voltage aforementioned is not less than 780V or not more than 320V or when the current limiting voltage does not reach 200V or more or exceeds 740V For 230V units When the voltage aforementioned is not more than 190V Supposed Causes W Power supply insufficient Instantaneous power failure Open phase Defective inverter PCB Defective control PCB Defective main circuit wiring Defective compressor Defective fan motor Defective connection of signal cable 261 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts A Caution may be damaged Check for power supply voltage Voltage between phases 460V x 10 or connections 10 without open phase erroneous Power ON connections or erroneous order of phases Unbalanced power supply Not more than 2 Onsite causes Phase voltage of not Correct the more than unbalanced approx 5V loads to elimina
139. e Service Defective low monitor Checker corresponding to H pressure the measurement value of control the pressure sensor Defective low Are the electrical pressure characteristics normal sensor Defective low Defective hot In both pressure gas solenoid lt Are the coil resistance and protection insulation normal cooling and valve control heating 2 Defective lt Is the pressure value L service checked with the Service Y monitor PCB Checker corresponding to Abnormally the measurement value of dropping low urit electronic the pressure sensor Pressure expansion Defective Defective lt Are the coil resistance and valve is indoor unit valve coil insulation normal evaporating throttled too p electronic H temperature much expansion _ Defective 3 valve body Defective gas Check for the thermistor m Pipe thermistor resistance and connection of indoor unit Defective liquid lt Check for the thermistor Defective i H pipe thermistor resistance and connection control of indoor unit Defective Defective lt Is the pressure value electronic service checked with the Service expansion monitor PCB Checker corresponding to valve control the measurement value of the pressure sensor Defective _ Defective lt Are the coil resistance and outdoor unit valve coil insulation normal H electronic H expansion Defective valve
140. e low pressure measured by the Service Checker with pressure sensor measurements 1 254 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller In heating D Connect the Service Checker 2 After resetting operation with a remote controller restart operation Are characteristics o the suction pipe thermistor and the heat exchanger thermistor normal 3 NO gt Replace the thermistor Is PCB detection temperature normal 4 NO gt Replace the main PCB 3 Compare the thermistor resistance with surface thermostat measurements 4 Compare the suction pipe temperature checked by the Service Checker with measurements obtained in 3 above Refer to P 348 Refer to P 351 Refer to P 372 255 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display m LI Applicable Models VRVII and 11 5 Series Method of Error Detection Shortage of refrigerant is detected by discharge pipe thermistor Error Decision Conditions Micro computer judge and detect if the system is refrigerant shortage Error is not decided while the unit operation is continued Supposed Causes Shortage of gas or refrigerant system clogging incorrect
141. e timer insert an independent use setting connector No independent use setting connector has been mounted at the factory Insert the connector which is attached to the casing of the master unit in the PCB CN1 X1A Independent use connector Master unit centralized setting connector To use two or more centralized controller in combination make settings according to the table shown below Centralized controller connection pattern Setting of master unit centralized setting connector 2 Patt intelligent Centralized Unified intelligent Centralized Unified anem Touch remote ON OFF Schedule Touch remote ON OFF Schedule Controller controller controller Controller controller controller Onlya single unit 1 102 1 Provided Others Not provided 2 1 1 unit 1 unit Provided Not provided x 1 1108 E Only All Not i single unit ided 4 155 UPS x Provided proton Others Not provided 5 Only a 6 1104 11016 unit single unit Al Not Not provided 7 units units Others Not Provided 8 1 unit provided Not provided 9 Only a 11016 single unit 10 units 1 unit Others Not Not provided provided 11 1 unit Provided http splitoff ru tehn doc html Troubleshooting by Indication on the Remot
142. ect an error for the fan motor circuit based on the number of rotation detected by hole IC during the fan motor operation Error Decision Conditions Overcurrent is detected for inverter PCB or fan inverter PCB W n the condition of fan motor rotation the number of rotation is below the fixed number for more than 6 seconds Supposed Causes W Defective fan motor W Defect or connection error of the connectors harness between the fan motor and PCB The fan can not rotate due to any foreign substances entangled Clear condition Continue normal operation for 5 minutes 117 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the monitor mode Check fan motor fan motor 1 or 2 corresponding to error code in the monitor mode of outdoor unit PCB Turn the power supply OFF and wait for 10 minutes Check if any foreign YES substances around felon the the fan substances Check the connection status of the connectors O Fan motor 1 relay connector or connectors of compressor inverter PCB O Fan motor 2 relay connector or connectors of fan inverter PCB Check if any connector is YES gt Insert t
143. ection results accompanying spare parts Give the user a copy of notification of inspection i results and leave it up to him sure to explain to the user that to improve the imbalance Gre power Supp y for which DAIKIN is not responsible n Note 1 Measure voltage at the power supply terminal block 2 Measure voltage at terminals RED WHITE and BLACK wire of the diode module inside the inverter while the compressor is running 236 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display a Applicable Models VRVII and WII Series Method of Error Detection Imbalance in supply voltage is detected in PCB Error Decision Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited status W Error is not decided while the unit operation is continued P1 will be displayed by pressing the INSPECTION button Supposed Causes Open phase Voltage imbalance between phases Defective main circuit capacitor Defective inverter PCB Defective magnetic contact switch Improper main circuit wiring 237 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the
144. ehn doc html Troubleshooting by Indication on the Remote Controller 3 23 3 Abnormal Discharge Pressure Remote Controller Display co la al Applicable Models VRV WII WIII IH S and Series Method of Error Detection Abnormality is detected when the contact of the high pressure protection switch opens Error Decision Conditions Error is generated when the high pressure switch activation count reaches the number specific to the operation mode Supposed Causes Actuation of high pressure switch W Defective high pressure switch W Defective outdoor unit main PCB W instantaneous power failure W Defective high pressure sensor 99 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check for the points shown below Is the stop valve open Is the high pressure switch connector properly connected to the main PCB 3 15 there continuity with the high pressure switch Are the 3 points NO above OK Rectify the defective points if any Mount a pressure gauge on the high pressure service port 2 Reset the operation using the remote controller and then restart the operation Does the abnormal stop uf 3 recu
145. ensor Abnormality 188 3 48 J Suction Pipe Pressure Sensor Abnormality onem 191 3 49 i Inverter PCB Abnormality 194 3 50 14 Inverter Radiation Fin Temperature Rise Abnormality essen 202 3 51 1 5 Momentary Overcurrent of Inverter Compressor 207 3 52 8 Momentary Overcurrent of Inverter Compressor 213 3 5315 Inverter Compressor Startup Failure 219 3 54 Transmission Error between Inverter and Control 3 55 Inverter Over Ripple Protection 3 56 74 Inverter Radiation Fin Thermistor Abnormality _ 2 239 3 57 Fu Field Setting Abnormality after Replacing Main PCB or Combination of PCB Abnormality 3 58 Refrigerant Shortage Alert 3 59 Reverse Phase Open Phase 3 60 2 Power Supply Insufficient or Instantaneous Error 261 3 61 43 Check Operation is not Executed 283 3 62 Transmission Error between Indoor Units and Outdoor Units 285 3 63 45 Transmission Error between Remote Controller and Indoor Unit 298 3 64 u Transmission Error Across Outdoor Units 300 3 65 45 Transmission Error between Main and Sub Re
146. ernal factor Return to normal NO Electronic expansion valve is NO other than error for example noise etc connected to outside unit PCB Normal when coil check 1 of the electronic NO gt After connecting turn the power OFF and then back ON again Replace the expansion valve is checked relay cable is YES electronic expansion valve Coil Replace the relay short circuited or disconnected cable nm Note Replace the outside unit PCB 1 Coil check method for the electronic expansion valve coil Discount the electronic expansion valve from the PCB and check the continuity between the connector pins 134 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Normal Pin No 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown 1 White x 3000 1500 2 Yellow x o x 3000 1500 3 Orange x 1500 4 Blue x 1500 5 6 Brown o Continuity x No continuity 1 White White 1 2 Yellow e Red 5 Orange 3 T 3 Orange O 4 Blue O i wee O 6 Brown O 135
147. erter PCB Replace the fan motor of outdoor unit 128 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Is the LED HAP on fan inverter PCB blinking NO Replace the fan inverter PCB 16 Check on connector of fan motor Power supply cable Are the resistance values between phases of U V W balanced Is there any short circuiting between phases of U V W NO gt Replace the fan motor of outdoor unit Check on connector of fan motor Signal wire Is the resistance value between Vcc and UVW and GND gt Replace the fan and UVW motor of outdoor balanced unit NO gt Replace the fan inverter PCB Refer to P 378 Refer to P 379 129 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 29 5 Electronic Expansion Valve Coil Abnormality Remote Controller Display Applicable Models VRVIII 11 5 and Series Method of Error Detection Check disconnection of connector To be detected based on continuity existence of electronic expansion valve coil Error Decision Conditions No current is detected in the common COM when power supply is ON Suppo
148. eshooting by Remote Controller Ayjeuuouqy god Jo JO Jaye Bumes 4 Ayjeuuouqy god Jo eve e JO Jaye Ayjeuuouqy 8umes 4 e e e e e yjeuuouqy 5 ui Uoneipes yjeuuouqy uoneipes LETS e e e uonoejoJd vec e e e e uonpejoJg ejddr jeAQ Ld Uolestusueu e acing oz veamyed uolssiuisuei 21 744 e e eunjie4 dnyejs JosseJdujo 61 e dnyejs sosseidwog 61 abed d d va VN sjuejuo OMAYA 5 HIMCASHA S IIAHA HAYA 59095 VOLY H cc 31 http splitoff ru tehn doc html Troubleshooting by Remote Controller 10413 snoeuejuejsu 26 Jo Aj ddng 10413 snoeuejuejsu ec Jo Ajddng 10413 snoeuejuejsu 692 10 Ajdd
149. eshooting by Remote Controller supply with power supply turned ON Slave 2 Error Troubleshooting code Description of error Description of diagnosis U1 01 Reverse phase open phase Refer to the U1 flow chart of for power supply Master each manual and make a _ diagnosis of the relevant unit Sega S cum Supp based on the Error code shown turned ON Master to the left U1 05 Reverse phase open phase for power supply Slave 1 U1 06 Reverse phase for power supply with power supply turned ON Slave 1 U1 07 Reverse phase open phase for power supply Slave 2 U1 08 Reverse phase for power 45 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 Troubleshooting by Indication on the Remote Controller 31 5 External Protection Device Abnormality Remote Controller Display nu Applicable Models All indoor models Method of Error Detection Detect open or short circuit between external input terminals in indoor unit Error Decision Conditions When an open circuit occurs between external input terminals with the remote controller set to external ON OFF terminal Supposed Causes Actuation of external protection device W improper field setting W Defective indoor unit PCB 46 htt
150. essor damage overheat Superheat due to defective compressor lt Are the coil resistance and insulation normal lt Are the coil resistance and insulation normal lt Are the electric characteristics normal lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Is the pressure value checked with the Service Checker corresponding to the measurement value of the pressure sensor lt Check if the piping temperature connected to the four way valve is normal 351 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Defective Defective lt Are the coil resistance and indoor unit valve coil insulation normal m electronic H In cooling expansion Defective If the indoor valve valve body unit electronic Defective gas lt Is the connector properly expansion valve i5 _ pipe connected thermistor of Are the thermistor throttled too H cns indoor unit resistance characteristics much normal 3 Defective lt Is the connector properly Defective thermistor for connected control indoor unit Are the thermistor Defective liquid pipe resistan
151. etween these wires Refer to P 348 Refer to P 372 106 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 26 5 Inverter Compressor Motor Lock Remote Controller Display cac la al Applicable Models VRVII and 1 5 Series Method of Error Detection Inverter PCB takes the position signal from UVWN line connected between the inverter and compressor and detects the position signal pattern Error Decision Conditions The position signal with 3 times cycle as imposed frequency is detected when compressor motor operates normally but 2 times cycle when compressor motor locks When the position signal in 2 times cycle is detected Supposed Causes W Compressor lock High differential pressure Incorrect UVWN wiring Defective inverter PCB Stop valve is not opened 107 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the installation conditions Is the stop valve open YES NO gt Open the stop valve Connect correctly YES Is high differential pressure gt Remedy the starting cause Check
152. f PCB replacement check the compressor 263 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check the fan driver power transistor Power OFF Has the power transistor got defective YES P A Y1 PAYL gt Check for connector connections Remove and insert the connectors shown below Furthermore check the connectors for terminal conditions and continuity Has the inverter PCB caused damage YES Has the fan driver caused damage YES Replace the fan driver PCB Observe the conditions of the PCB Replace the inverter PCB lf the PCB replaced is badly damaged the compressor is likely to get defective To make sure recheck the compressor Replace the fan driver PCB If the PCB replaced is badly damaged the fan motor is likely to get defective To make sure recheck the compressor 264 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Turn ON the power supply Stop standby before the Recheck for the fan rotates power supply If there is no problem with the power supply replace the noise filler PCB If the error Stop recurs replace Power ON standby Y
153. f the inverter PCB 233 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 55 gt Inverter Over Ripple Protection Remote Controller Display mi Applicable Models VRVIII WIII and Series Method of Error Detection Imbalance in supply voltage is detected in PCB Imbalance in the power supply voltage causes increased ripple of voltage of the main circuit capacitor in the inverter Consequently the increased ripple is detected Error Decision Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited status Error is not decided while the unit operation is continued will be displayed by pressing the INSPECTION button When the amplitude of the ripple exceeding a certain value is detected for consecutive 4 minutes Supposed Causes W Open phase Voltage imbalance between phases Defective main circuit capacitor Defective inverter PCB Defective relay in inverter PCB Improper main circuit wiring 234 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is an imbalance in supply voltages in
154. h manual andimakea 2 Inverter PCB diagnosis of the relevant unit based on the Error code shown L1 14 Current offset error Slave 2 to the left Inverter PCB L1 15 IGBT error Slave 2 Inverter The inverter PCB may be faulty PCB or a PCB other than the specified one is mounted Refer to the L1 flow chart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left L4 01 Radiation fin temperature Refer to the L4 flow chart of rise Master Inverter PCB each manual and make a L4 02 Radiation fin temperature diagnosis of the relevant unit rise Slave 1 Inverter PCB based on the Error code shown to the left L4 03 Radiation fin temperature rise Slave 2 Inverter PCB L5 03 Current offset error Master Refer to the L5 flow chart of each manual and make a diagnosis of L5 05 Current offset error Slave 1 iho relevant nit based on the L5 07 Current offset error Slave 2 Error code shown to the left 43 http splitoff ru tehn doc html Troubleshooting by Remote Controller Error Troubleshooting code Description of error Description of diagnosis L8 03 INV compressor Refer to the L8 flow chart of instantaneous overcurrent each manual and make a error Master diagnosis of the relevant iy compressor of the relevant unit
155. he compressor and the inverter and turn ON the power transistor check mode setting using Setting Mode 2 on the outside unit PCB Measure the output voltage of the inverter 2 Note Take measurements while frequency is stable among three phases is within 5V NO Replace the for TL power supply inverter PCB and 10V for Y1 YL power supply Replace the outside unit main PCB 1 For thermistor sensor characteristics refer to P 369 2 The quality of the power transistor diode module can be assessed by means of measurement of resistance between terminals Refer to P 354 161 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 36 High Pressure Sensor Abnormality Remote Controller Display 1 Applicable Models VRVIII Q Series Method of Error Detection Error is detected from the pressure measured with high pressure sensor Error Decision Conditions When the high pressure sensor is short circuit or open circuit Supposed Causes W Defective high pressure sensor W Connection of low pressure sensor with wrong connection W Defective outdoor unit PCB W Defective connection of high pressure sensor 162 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Contr
156. he disconnected connector Check the color of relay connectors O Fan motor 1 Both power supply wire and signal wire are all white O Fan motor 2 Both power supply wire and signal wire are red in the PCB side and white in the motor side Relay connectors have any connection error YES gt Correct the connection of the relay connectors 118 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller continuity of fuse on the fan inverter PCB YES gt Replace the fan inverter PCB Unable to rotate the fan manually with ease when removing the YES gt Replace the corresponding fan motor Resistance value between the power supply wire terminal of fan motor and the motor frame metal is Replace the corresponding fan motor CHECK 16 Check fan motor connector power supply wire The resistance value between UVW phases of fan motor is out of balance or short circuit between UVW YES gt Replace the corresponding fan motor 119 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check fan motor connector signal wire short circuits YES between Vcc and GND and between U
157. heck the system using micro computer if signal transmission between indoor unit and remote controller main and sub is normal Error Decision Conditions Normal transmission does not continue for specified period Supposed Causes W Transmission error between main and sub remote controller W Connection between sub remote controllers Defective remote controller PCB 314 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Using 2 remote controllers control SS1 of remote controller i Set SS1 to PN to MAIN the power supply OFF once and then back ON SS1 of both remote controllers is set to SUB Turn the power OFF and then back ON If an error occurs replace the remote controller PCB Set one remote controller to MAIN the power supply OFF once and then back ON 315 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 66 45 Transmission Error between Indoor and Outdoor Units in the Same System Remote Controller Display LI zi Applicable Models All indoor models VRVIII 111 5 Series
158. hooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Connect the Service Checker Restart operation after resetting operation Are discharge pipe thermistor NO gt Replace the characteristics discharge pipe a thermistor YES 15 PCB NO detection temperature gt Replace the main normal PCB 2 YES The discharge pipe thermistor is normal and the main PCB temperature detection is also normal In fact discharge pipe temperature is rising VZ m Note 1 Compare the resistance values of the discharge pipe thermistor with measurements of a surface thermometer For temperature and resistance characteristics of a thermistor refer to P 371 2 Compare the discharge pipe temperature checked by the Service Checker with the resistance of the thermistor refer to 1 Refer to P 351 140 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Due Applicable Models VRVII and 11 5 Series Method of Error Detection Abnormality is detected according to the temperature detected by the discharge pipe thermistor Error Decision Conditions When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenly
159. iagnosis of the relevant 46 02 Faulty heat exchanger A thermistor based on the Error thermistor Slave 1 code shown to the left 46 03 Faulty heat exchanger thermistor Slave 2 J7 01 Faulty liquid pipe thermistor Refer to the J7 flow chart of Master each manual and make a 2 mud oi diagnosis of the relevant 7 02 uns m pipethermistor thermistor based on the Error code shown to the left J7 03 Faulty liquid pipe thermistor Slave 2 49 01 Faulty subcooling heat Refer to the J9 flow chart of exchanger outlet thermistor each manual and make a Master diagnosis of the relevant J9 02 Faulty subcooling heat ee esoo it Error exchanger outlet thermistor SHOWN AQ Slave 1 49 03 Faulty subcooling heat exchanger outlet thermistor Slave 2 JA 01 Faulty high pressure sensor Refer to the JA flow chart of Master each manual and make a _ diagnosis of the relevant sensor ad Mx ad based on the Error code shown to the left JA 03 Faulty high pressure sensor Slave 2 JC 01 Faulty low pressure sensor Refer to the JC flow chart of Master each manual and make a _ diagnosis of the relevant sensor us 1 based the Error code shown to the left JC 03 Faulty low pressure sensor Slave 2 L1 01 Instantaneous overcurrent The inverter PCB may be faulty Master Inverter PCB Refer to the L1 flow chart of L1 02 Current sensor error
160. indication in 2 minutes and over The indoor units PCB indicating 45 are normal Check the indoor units in the other circuits to diagnose failure according to the corresponding error codes 293 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models All indoor models VRVII 11 5 WII and WIII Series Method of Error Detection Micro computer checks if transmission between indoor and outdoor outside units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes W indoor to outdoor outside to outside unit transmission wiring F1 F2 disconnection short circuit or wrong wiring W Outdoor outside unit power supply is OFF W System address does not match W Defective indoor unit PCB W Defective outdoor outside unit PCB 294 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Has the indoor or outdoor outside unit PCB been replaced or has the indoor outdoor outside or outdoor outside outdoor outside unit
161. ing type electronic expansion valve C1 01 Transmission error between Check for the conditions of indoor unit PCB and the PCB transmission between the indoor for the fan unit PCB and the PCB for the fan 36 http splitoff ru tehn doc html Troubleshooting by Remote Controller cleaning decoration panel when the self cleaning decoration panel is mounted Error Troubleshooting code Description of error Description of diagnosis C6 01 Faulty combination of indoor A combination of indoor unit PCB unit PCB and the PCB forthe and the PCB for the fan is faulty fan Check whether the capacity setting adaptor is correct and the type of the PCB for the fan is correct U4 01 Indoor Outdoor transmission Refer to the U4 flow chart error UA 13 Refrigerant type error The type of refrigerant used for the indoor unit is different from that used for the outdoor unit UA 15 Not applicable for self An outdoor unit is not applicable for the self cleaning decoration panel is connected 37 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 5 2 Outdoor Unit Error Troubleshooting code Description of error Description of diagnosis E3 01 High pressure switch
162. ing voltage does not reach 200V or more or exceeds 740V Supposed Causes W Power supply insufficient Instantaneous power failure Open phase Defective outdoor unit control PCB Defective main circuit wiring Defective compressor Defective fan motor Defective connection of signal cable 272 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged supply voltage Voltage between phases 380 to 415V Phase voltage 220 to 240V Onsite causes Make proper wire connections without open phase erroneous Power ON connections or erroneous order of phases Unbalanced power supply Not more than 2 Onsite causes Phase voltage of not Correct the more than unbalanced approx 5V loads to eliminate the unbalanced L state Unbalanced voltage will Disconnect the cable from cause extremely the compressor and then unbalanced Power OFF check the compressor for current thus the insulation resistance impairing the service life of or resulting in the error of the equipment The insulation resistance is low 1 not more than 100kQ YES Replace the compressor Disconnect the cable from the fan and then check the fan motor for
163. ingle system noises or applied to the Multi system thunder outdoor unit While in monitor mode check the outdoor unit YES concerned Single system While in monitor mode check whether the system is right hand service monitor PCB 1 or left hand service monitor PCB 3 195 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 1 Check if the power transistor is normal Check if insulation resistance of the compressor is 100kQ or Replace the compressor and compressor inverter PCB at the same time Replace the inverter PCB gt Replace the compressor inverter PCB and fan inverter PCB Check if the power transistor of the fan driver is normal NO YES gt Replace the inverter PCB Refer to P 354 196 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display oo Applicable Models VRVIII S Series Method of Error Detection Error is detected based on the current value during waveform output before starting compressor Error is detected based on the value from current sensor during synchronous operation when starting the unit Error Decision Conditions Overcurrent flows during waveform
164. ion Detect refrigerant shortage using low pressure or difference in temperature between the suction pipe and the heat exchanger Error Decision Conditions In cooling W Low pressure of 0 25 MPa or less continues for 30 minutes In heating Suction gas superheated degree of 20 C or more continues for 60 minutes Abnormality is not confirmed and operation is continued Supposed Causes Refrigerant shortage or clogged refrigerant wrong piping W Defective thermistor W Defective low pressure sensor W Defective main PCB 253 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged In cooling Set up a pressure gauge in the service port on the low pressure side 2 Connect the Service Checker 3 Reset operation with a remote controller and restart operation pressure sensor characteristics normal NO gt Replace the low pressure sensor Is the PCB NO detector pressure gt Replace the main normal 2 PCB 1 Compare pressure sensor measurements with pressure gauge readings For measurements by a pressure sensor measure voltage between connectors 2 and 3 and convert it to pressure in accordance with 2 Compar
165. ion Error is detected according to the temperature detected by heat exchanger gas pipe thermistor Error Decision Conditions When the heat exchanger gas pipe thermistor is short circuited or open Supposed Causes W Defective heat exchanger gas pipe thermistor W Defective outside unit PCB 170 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is the connector for heat exchanger gas pipe thermistor connected to outside unit PCB NO Connect the connector and operate unit again Is the resistance measured after removing the thermistor from outside unit PCB normal 11 gt Replace the thermistor Replace the outside unit PCB MITT Refer to P 369 171 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 40 25 Suction Pipe Thermistor Abnormality Remote Controller Display uz Applicable Models All outdoor unit models Method of Error Detection Error is detected from the temperature detected by the suction pipe thermistor Error Decision Conditions When short circuit or an ope
166. ion heavy current part of inverter gets defective gives no output 367 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Error codes related to compressor current 460V 32 3A 230V 59 14 Current 460V 19 0A 230V 33 460V 16 1A 230V 27 6A L5 Compressor overcurrent Electronic thermal 2 L8 Compressor overcurrent Electronic thermal 1 L8 Max control gt Time 368 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller EE Thermistor Resistance Temperature Characteristics For radiation fin thermistor TC Tic 30 354 1 55 5 761 25 259 7 60 4 797 20 192 6 65 4 014 15 144 2 70 3 375 10 109 1 75 2 851 5 83 25 80 2 418 0 64 10 85 2 060 5 49 70 90 1 762 10 38 85 95 1 513 15 30 61 100 1 304 20 24 29 105 1 128 25 19 41 110 0 9790 30 15 61 115 0 8527 35 12 64 120 0 7450 40 10 30 125 0 6530 45 8 439 130 0 5741 50 6 954 3PA61998L AD92A057 369 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller For outdoor air thermistor For suction pipe thermist
167. ion wiring of the Indoor Unit c and transmission wiring of the Indoor Unit d in the order described If the place with continuity can be identified there may be broken wires in places before the said place with continuity 93 ex A Short circuit S outdoor outdoor unit terminal rS 2 Short circuit between Indoor outdoor Unit Transmission Wiring Outdoor outdoor Unit Transmission Wiring the indoor outdoor unit Check the transmission inuit terminal parts wiring for continuity If there is continuity the indoor outdoor unit transmission has no broken wires in it Check the transmission wiring for continuity If there is continuity the outdoor outdoor unit transmission has no broken wires in it 374 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller eae PA Master Unit Centralized Connector Setting Table The master unit centralized setting connector CN1 X1A is mounted at the factory To independently use a single unit of the intelligent Touch Controller or a single unit of the centralized remote controller do not dismount the master unit centralized setting connector i e use the connector with the factory setting unchanged To independently use the schedul
168. ioners should not be installed in areas where corrosive gases such as acid gas or alkaline gas are produced 2 If the outdoor unit is to be installed close to the sea shore direct exposure to the sea breeze should be avoided If you need to install the Outdoor unit close to the sea shore contact your local distributor Nem DARI ADUSTRES eTo gt AIR CONDITIONING MANUFACTURING DIVISION THAILAND LTD AI f the Daikin Group s business Scope of Registration facilities and subsidiaries in Japan THE DESIIUDEVELOPNENT AND MANUFACTURE OF Scope of Registration are certified under the ISO 14001 COMMERCIAL AIR CONDITIONING HEATING COOLING THE DESIGNDEVELOPMENT international standard for REFRIGERATING EQUIPMENT HEATING EQUIPMENT AND MANUFACTURE OF AIR Au LAC environment management pM MENS BEES mmo JMI 0107 COMPRESSORS AND VALVES PRESS USED FOR Dealer DAIKIN INDUSTRIES LTD Head Office Umeda Center Bldg 2 4 12 Nakazaki Nishi Kita ku Osaka Japan JA Sirena East Bog 2 181 Koran raga End 2184 http www daikin com global_ac Al rights reserved Specifications designs and other content appearing in this brochure are current as of September 2011 but subject to change without notice Si30 701 A Printed in Japan 09 2011 K AK http splitoff ru tehn doc html
169. is SLAVE PCB Check if the normal condition monitor LED for the outdoor unit main PCB blinks Check if power is supplied to the outdoor unit Supply the power to the outdoor unit Replace the outdoor unit main PCB 305 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check if the normal condition monitor LED for the external NO outdoor unit external control adaptor onnect the for outdoor unit is power supply connected to 5V wire for the external control adaptor for the C H outdoor unit to SELECT of 5V supply line the external PEYSS control adaptor for outdoor unit to IND gt Replace the PCB of the external control adaptor for outdoor unit Replace the outdoor unit main PCB 306 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 3 Check of error 3 Check of error 4 920000030 00 Check the connection status of connecting wires of the outdoor multi to SLAVE 1 Check if the wiring is disconnected o
170. itoff ru tehn doc html Troubleshooting by Indication on the Remote Controller High suction Short circuit In cooling air temperature of High outdoor outdoor unit air High suction temperature air temperature High suction Short circuit of the air condenser temperature of High room indoor unit temperature Defective suction air In heating thermistor of indoor unit condensing Degradation in capacity High suction air temperature of outdoor unit Defective outdoor air temperature thermistor of outdoor unit Dirty condenser Mixing of non condensable gas lt Is the suction air temperature less than 43 C lt Is the outdoor temperature less than 43 C lt Is the suction air temperature less than 27C lt Is the room temperature less than 27 C lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Is the outdoor air temperature less than 16 CWB lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Is the heat exchanger clogged In cooling lt Is air or else mixed in the refrigerant system Excessive refrigerant charging Improper model selection _ Decreased Defective lt Ca
171. ks if transmission between indoor unit and remote controller is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes W improper connection of transmission wiring between outdoor outside unit and external control adaptor for outdoor outside unit W improper cool heat selection improper cool heat unified address outdoor outside unit external control adaptor for outdoor outside unit W Defective outdoor outside unit PCB W Defective external control adaptor for outdoor outside unit W improper connection of transmission wiring between outdoor outside units of multi outdoor outside unit connection 311 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged outside units NO multi connection transmission wiring normal Is the indoor Fix the outdoor outside units multi connection transmission wiring and reset power Fix the indoor outdoor outside unit transmission wiring Replace the outdoor outside unit PCB A1P Set C H SELECT outdoor outside NO unit transmission wiring normal C H SELECT is set
172. level i i i T Low pressure Low pressure rises due i to decreased i i i i i i i i i i T i i i i i i i T compressor output i i Frequency To maintain low pressure frequency increases under the capacity control 359 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller The outdoor unit electronic expansion valve is closed due to the overload control Frequency comes to the minimum level High pressure is maintained 1 i ata constant level i High pressure N High pressure drops or rises immediately after the overload control is complete Low pressure Low pressure rises due to decreased frequency Low pressure drops due to closed outdoor unit electronic expansion valve Hot gas bypass is activated for low pressure protection i e hunting at low pressure Frequency To maintain high pressure frequency decreases under the capacity control Degree of overcharge Proper amount gt Higher degree of overcharge 360 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check for shortage of refrigerant In case of VRV System
173. ling of indoor or outdoor unit obstacle s Clogged air filter s Clean the air filter s Enclosed outdoor unit s Remove the enclosure Improper set temperature Set the temperature to a proper degree Airflow rate set to Set it to a proper LOW airflow rate Improper direction Set it to a proper of air diffusion direction Open window s or Shut it tightly Direct sunlight Hang curtains or received shades on windows Too many persons The model must staying in a room Too many heat sources e g OA equipment located in a room be selected to match the air conditioning load 12 http splitoff ru tehn doc html Symptom based Troubleshooting Symptom Supposed Cause Countermeasure 4 The system does not operate The system stops and immediately restarts operation Pressing the TEMP ADJUST button immediately resets the system If the OPERATION lamp on the remote controller turns ON the system will be normal These symptoms indicate that the system is controlled so as not to put unreasonable loads on the system Normal operation The system will automatically start operation after a lapse of 5 minutes The remote controller displays UNDER CENTRALIZED CONTROL which blinks for a period of several seconds when the OPERATION but
174. litoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Operation ready lamp H2P is blinking Lamp does not go YES A OFF for 12 minutes or more Is indoor outdoor and outdoor outdoor unit transmission wiring normal Disconnect the outdoor outdoor unit transmission wiring and NO gt Press and hold the RESET button on the outdoor unit PCB for 5 seconds Fix the indoor outdoor or outdoor outdoor unit transmission wiring then check with a single system whether or not it is normal gt Replace the outdoor unit PCB gt Mount the DIII NET expander adaptor 288 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models All indoor models VRVIII S and Series Method of Error Detection The error is generated when the micro computer detects that the transmission between the indoor and outdoor unit is not normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes W Indoor to outdoor outdoor to outdoor transmission wiring F1 F2 disconnection short circuit or wrong wiring W Outdoor unit power supply is OFF W System address does not match W Defective outdoor unit main PCB
175. lity Dust Clogging Remote Controller Display mo Applicable Models All indoor models Method of Error Detection Check the coil condition of electronic expansion valve by using micro computer Check the dust clogging condition of electronic expansion valve main body by using micro computer Error Decision Conditions Pin input for electronic expansion valve coil is abnormal when initializing micro computer Either of the following conditions is seen caused occurs while the unit stops operation Temperature of suction air temperature of liquid pipe of heat exchanger gt 8 Temperature of liquid pipe of heat exchanger shows fixed degrees or below Supposed Causes W Defective electronic expansion valve coil W Defective PCB indoor unit W Defective relay cables 68 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged When power NO is supplied gt Replace the electronic expansion valve main body Electronic expansion valve is connected to indoor unit PCB NO gt Shut the power supply OFF after connection and then restart Check 1 of electronic expansion valve coil indicates normal Replace the electro
176. ltage 400V Is the fuse on YES the outdoor unit PCB blown Replace the fuse Does the LED in preparation mode H2P on the outdoor unit PCB blink Replace the outdoor unit PCB Lights do not go out for 12 minutes or more YES gt Press the RESET button on the main PCB of the outdoor unit main PCB Keep pressing for 5 Seconds or more NAA the indoor outdoor outdoor outdoor connecting wires normal NO gt Correct the connecting wires 291 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check if the operation is normal with 1 circuit NO after outdoor outdoor connecting wires are disconnected gt Replace the outdoor unit main PCB gt Install DIII Net expander adaptor 292 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Continued from the previous page In Confirmation of error 4 LED lamp indicates as follows 9ooeooo Start operation of all the indoor units Do all the units indicate ug NO Continue the operation Did more than 2 minutes pass since Us was indicated NO Make a diagnosis again based on the
177. mote Controllers 314 3 66 4 5 Transmission Error between Indoor and Outdoor Units in the Same System 316 3 67 45 Improper Combination of Indoor and Outdoor Units Indoor Units and Remote Controller 321 iii http splitoff ru tehn doc html VRV Series 3 68 Address Duplication of Centralized Remote Controller 335 3 69 Transmission Error between Centralized Remote Controller and Indoor Unit 336 3 70 System is not Set yet 341 3 71 UH System Abnormality Refrigerant System Address Undefined 343 http splitoff ru tehn doc html VRV Series Applicable Model Series Refrigerant Type Product Series M I VRVII 2 R 22 VRVII S 3 Air Cooled Inverter VRVII 4 VRVII S 5 Water Cooled VRV WII 6 R 410A VRVIII 7 Air Cooled VRVIII Q 9 Inverter P A VRVIII S 10 Water Cooled VRV WIII 11 http splitoff ru tehn doc html VRV Series Applicable Models 1 R 22 1 1 VRVII M A Series
178. n circuit in the suction pipe thermistor is detected Supposed Causes W Defective thermistor for outdoor unit suction pipe Defective outdoor unit PCB W Defective thermistor connection 172 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged Connector is connected to outdoor unit PCB NO gt Connect the connector and turn ON again Resistance is normal when measured after disconnecting the thermistor from the outdoor unit PCB CHECK 11 gt Replace the thermistor Replace the outdoor unit PCB NIIT TI Refer to P 369 173 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 41 25 Outdoor Unit Heat Exchanger Thermistor Abnormality Remote Controller Display Applicable Models VRVII 11 5 111 II S and Series Method of Error Detection Error is detected from the temperature detected by the outdoor unit heat exchanger thermistor Error Decision Conditions When short circuit or an open circuit in the heat exchanger thermistor is detected Supposed Causes W Defective thermistor for outdo
179. n from the current flow on the fan PCB Detection from the RPM of the fan motor in operation Detection from the position signal of the fan motor Detection from the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows W The RPM is less than a certain level for 6 seconds W A position error in the fan rotor continues for 5 seconds or more W An overcurrent flow Supposed Causes W The clogging of a foreign matter W The disconnection of the fan motor connectors W The disconnection of the connectors between the indoor unit PCB and fan PCB Defective fan PCB W Defective fan motor 57 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power and wait for 10 minutes There is a foreign matter YES gt Remove the around the fan foreign matter The fan motor connectors of the YES fan PCB are g Gonner disconnected connectors between the indoor unit PCB and YES gt Connect the fan PCB are correctly disconnected The fuse on the fan PCB is not ina conduction state NO gt Replace the fan PCB fan can be moved lightly
180. n normal transmission is not carried out for certain duration Supposed Causes Defective connection of the connector between indoor unit PCB and fan PCB W Defective indoor unit PCB Defective fan PCB W External factor such as instantaneous blackout 75 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged the connector between indoor unit PCB and fan PCB accurately connected 1 NO Connect the connector accurately Confirm the condition of transmission on indoor unit PCB using field setting mode 2 Under above field setting mode Second code No is ur NO gt Replace the indoor unit PCB YES Connect the connector and turn ON the power again Reoccurrence of error YES Replace the fan PCB gt Connect it and continue the operation It is possible to have a cause such as instantaneous blackout 76 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Note 1 2 Pull out and insert the connector once and check it is absolutely connected
181. n the Remote Controller Remote Controller Display LI Applicable Models All indoor models VRVIII S Series Method of Error Detection A difference occurs in data by the type of refrigerant between indoor and outdoor units The number of indoor units is out of the allowable range Incorrect signals are transmitted among the indoor unit BS unit and outdoor unit Error Decision Conditions The error decision is made as soon as either of the abnormalities aforementioned is detected Supposed Causes Excess of connected indoor units W Defective outdoor unit PCB W Mismatching of the refrigerant type of indoor and outdoor unit W Setting of outdoor unit PCB was not conducted after replacing to spare PCB W The outdoor unit PCB was replaced with wrong one 325 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting A Caution Check the LED lamps for Check 3 corresponding to the error code L and for Check 4 in the monitor mode Check 3 Y Check 4 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged d00 00080 900090600 gt To Diagnosis Check 3 Check 4 Flow 1 Excessive number of indoor units connected 0000000 92008000 gt To Diagnosis Check 3
182. n the fan motor fan output fan motor be rotated with Decreased airflow the motor coil rate resistance and insulation normal Defective lt If a spare PCB is service mounted is the monitor capacity setting H PCB properly made Including capacity setting High Dirty filter lt Is the air filter airflow clogged passage resistance H Obstacle lt Is there any obstacle in the airflow passage lt Refer to error code In heating lt Is the indoor unit too small n Note 1 In cooling it is normal if the outdoor unit electronic expansion valve EVM is fully open 2 In heating the indoor unit electronic expansion valve is used for subcooling degree control compared to the large sized outdoor unit 347 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller ots Check for causes of drop in low pressure Referring to the Fault Tree Analysis FTA shown below probe the defective points Defective low lt Are the electrical Defective pressure characteristics normal In ut compressor E Defective lt Is the pressure value control service checked with th
183. n thermistor CHECK 11 Is the resistance of thermistor correct NO gt Replace the inverter PCB Thermistor can not be removed from the inverter PCB NO Is the resetting possible gt Replace the inverter PCB gt After resetting restart Refer to P 369 242 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 57 Field Setting Abnormality after Replacing Main PCB or Combination of PCB Abnormality Remote Controller Display a Fu Applicable Models VRVIII Series Method of Error Detection This error is detected according to communications with the inverter PCB Error Decision Conditions Make judgement according to communication data on whether or not the type of the inverter PCB is correct Supposed Causes W Defective or no field setting after replacing outdoor unit main PCB W Mismatching of type of PCB 243 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged NO replaced with a spare PCB Is the model NO WY setting of the spare PCB correct Is the ty
184. ng 10413 snoeuejuejsu 992 Jo jueroyjnsu Aj ddng 10413 snoeuejuejsu Jo Ajddns ZN 692 oseug 5 LN 992 e eBeyuous ESZ 092 e e on Ayjeuuouqy god Jo e e 10 god Jaye Ajyjeuuouqy Bumes pier Ayjeuuouqy god Jo 175 Jo god Jaye Ayjeuuouqy 8umes pier P d d va VN SJU9JUOD JOU OMAYA SAHAYA HIMCASHA MAYA SAYA 59095 VOLY H cc 32 http splitoff ru tehn doc html Troubleshooting by Remote Controller wayshS 815 e e e e e e spun pue Joopu 10117 UOISSILUSUEJ Wa shg 9i Joopu 10413 uoissiuisuel 6N qng pue vie 581 5 1 en LLE e e e e spun ssoJoy 10413 uoissiuusueJ 00 e e spun ssoJoy 40413 uoi
185. ng codes can Thermostat is forcibly be checked turned ON Error codes Indoor model code Outdoor model code 18 http splitoff ru tehn doc html Troubleshooting by Remote Controller 2 2 Self diagnosis by Wired Remote Controller 2 2 1 Wired Remote Controller BRC1D61 If operation stops due to error the remote controller s operation LED blinks and error code is displayed Even if stop operation is carried out error contents are displayed when the inspection mode is entered The error code enables you to tell what kind of error caused operation to stop Refer to P 24 for error code and error contents Operation LED ON OFF button Display of indoor unit for which an error has been detected Inspection display Error code Inspection Test button Note 1 Pressing the INSPECTION TEST button will blink the check indication 2 While in service mode holding down the ON OFF button for a period of 5 seconds or more will clear the error history indication shown above In this case on the codes display the error code will blink twice and then change to 00 2 Normal the Unit No will change to 0 and the operation mode will automatically switch from service mode to normal mode displaying the set temperature
186. ng operation The inverter NO causes The hot gas bypass valve may not be opened Check it Replace the compressor operates normally YES Disconnect the connection between the compressor and the inverter and turn on power transistor check mode setting using Setting Mode 2 on the outside unit PCB Measure inverter output voltage Note Take measurements while frequency is stable compressor http splitoff ru tehn doc html 113 Troubleshooting by Indication on the Remote Controller NO within 5V for TL power supply and 10V for YL gt Replace the inverter PCB gt Replace the inverter compressor 1 Difference in pressure between high and low pressures before startup 2 The quality of the power transistor diode module can be assessed also by means of measurement of resistance between terminals 114 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 27 amp STD Compressor Motor Overcurrent Lock Remote Controller Display Applicable Models VRVII and Series Method of Error Detection Detects the overcurrent with current sensor Error Decision Conditions Error is decided when the detected current value exceeds the below mentioned val
187. ng with dust at when the self cleaning the dust collection port as well as decoration panel is mounted in the brush unit S shaped pipe and dust box Furthermore check for any stains of the light receiving and emitting parts of the infrared unit AH 06 Air filter rotation error Check for anything getting in the when the self cleaning way of rotating the filter e g the decoration panel is mounted filter comes off or the drive gear is clogged with foreign matters AH 07 Damper rotation error The damper does not rotate when the self cleaning normally Check for any foreign decoration panel is mounted matters around the damper and for the operation of the gear and limit switch 08 Filter self cleaning operation The unit has not yet completed error the filter self cleaning operation when the self cleaning even after the lapse of specified decoration panel is mounted period of time Check for any external noise etc 09 Filter self cleaning operation The unit has been put into a state start disabled error in which the filter self cleaning when the self cleaning operation is disabled Check the decoration panel is mounted unit for the operating conditions AJ 01 Capacity setting error There is an error in the capacity setting of the indoor unit PCB AJ 02 Electronic expansion valve There is a fault in the setting of setting error the gear type electronic expansion valve direct act
188. nic expansion valve coil Relay cables short circuit or disconnected YES gt Replace the relay cables gt When restarting the operation after shutting the power supply OFF does not work replace the indoor unit PCB 69 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller mn Note 1 How to check the electronic expansion valve coil Remove the connector for electronic expansion valve from PCB Measure the resistance value between pins and check the continuity to judge the condition 1 White O White 1 ite 1 2 Yellow O EX Red 5 3 3 Orange Orange 3 4 mis Yellow Brown Blue 5 Red Q e 9 6 Brown O The normal products will show the following conditions CD No continuity between 1 and 2 2 Resistance value between 1 and 3 is approx 300 Q 3 Resistance value between 1 and 5 is approx 150 Q 4 Resistance value between 2 and 4 is approx 300 Q Resistance value between 2 and 6 is approx 150 Q 70 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 10 AF Drain Level above Limit Remote Controller Display cu n Applicable Models R 22 FXF FXC FXK FXS FXM FXYB R 410A FXFQ FXZQ FXCQ
189. nit main PCB is disconnected inside outside relay wires correctly gt Replace the outdoor unit main PCB 93 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 21 2 Earth Leakage by Leak Detection PCB Assy Remote Controller Display Applicable Models VRV WII WIII III and Series Method of Error Detection Failure is to be detected by using leak detection PCB assy Error Decision Conditions Leakage is detected under the conditions outside of the scope of high pressure switch operation Supposed Causes W Defective compressor 94 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power supply and then disconnect compressor lead wire the compressor for insulation using a megger tester Insulation fault Replace the defective part Not fault Insulation fault Replace the defective part Disconnected high pressure switch line for any disconnection Securely connect the connectors Connected Check the earth leakage detection PCB for any broken wire in it
190. odules can be judged by executing 5 4 ITEM Refer to P 354 111 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display ch Applicable Models VRV WII and WIII Series Method of Error Detection Pick up the location signal using the inverter PCB from the UVWN line connected between the inverter and the compressor and detect location signal pattern Error Decision Conditions In normal operation location signal for a triple cycle of frequency applied while in locked operation it is a double cycle and they are detected Retry twice 60 minutes Supposed Causes W inverter compressor lock High differential pressure Incorrect UVWN wire connection Defective inverter PCB Stop valve is not opened 112 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged NO 15 the stop valve opened YES Is the UVWN wire NO Open the stop valve Connect connection proper Is it a high differential pressure YES properly Eliminate the at the time of startup 1 Restart operation after resetti
191. of wet operation Referring to the Fault Tree Analysis FTA shown below probe the defective points Wet operation Defective crankcase _ Refrigerant heater accumulation Frequent ON OFF of compressor Overcharge of refrigerant Defective Defective In cooling indoor unit valve coil Indoor unit m electronic electronic expansion Defective expansion valve valve body 9 1 Defective gas _ pipe thermistor of indoor unit Defective Defective liquid pipe control thermistor of indoor unit Defective Defective control of L service superheated monitor PCB degree Defective Defective outdoor unit valve coil H electronic expansion Defective valve valve body Defective low r pressure sensor In heating Outdoor unit Defective Detective electronic control suction pipe expansion thermistor valve opens too much 2 Defective service monitor lt Refer to CHECK 11 lt Are the coil resistance and insulation normal lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Are the coil resistance and insulation normal lt Are
192. oller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged 1 Set the high pressure gauge 2 Connect the checker for VRV Are the Characteristics of the high pressure sensor normal Make a comparison between the voltage characteristics and the gauge pressure NO Replace the high pressure sensor pressure detection normal Make comparison between the checker pressure data and the voltage characteristics NO Replace the outdoor unit sub PCB Reset the operation and then restart the outdoor unit 163 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Are the characteristics of the high pressure sensor normal NO gt Replace the high pressure sensor gt Replace the outdoor unit sub PCB 164 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 37 Current Sensor Abnormality Remote Controller Display uc Applicable Models VRVIII and Series Method of Error Detection Error is detected according to the current value detected by current sensor Error Decision Conditions When the current value detecte
193. on is not conducted in certain period or longer Supposed Causes W Defective connection between the inverter PCB and control PCB Defective control PCB transmission section Defective inverter PCB Defective noise filter Defective fan inverter Incorrect type of inverter PCB Defective inverter compressor Defective fan motor External factor Noise etc 226 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Are the connectors of the inverter PCB NO control PCB and sub Properly connect PCB all securely the connectors connected Is the type of the inverter PCB correct NO Replace it with a correct PCB The INV compressor has insulation resistance of not more than 100kQ YES gt Replace the compressor M1C The fan motor has insulation resistance of YES gt Replace the fan not more than motor 1MQ The micro computer NO normal monitor gt Not the L green of the control PCB is blinking error Check the error code again 227 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller
194. on may be damaged Confirm which high pressure sensor is abnormal using outdoor unit monitor mode 1 Set the high pressure gauge upright 2 Connect the checker for VRV to the gauge Are the Characteristics of the high pressure sensor Replace the high pressure sensor pressure Is the PCB pressure detection normal Make a comparison between the checker pressure data and the voltage characteristics 1 gt outdoor unit main PCB 183 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 1 Reset the operation and then restart the outdoor unit characteristics of the high pressure NO gt Replace the high pressure sensor Replace the outdoor unit main PCB 1 Voltage measurement point Outdoor unit PCB sy Connector for high pressure Sensor 5 8 a Red GND G Black a Micro computer D White A D input 2 EIER IE Measure DC voltage here Refer to P 372 184 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 46 7 Discharge Pipe Pressure Sensor Abnormality Remote Controller
195. on may be damaged Confirm which thermistor is abnormal using outdoor unit monitor mode connector for subcooling heat exchanger gas pipe thermistor connected to outdoor unit PCB NO Connect the connector and turn ON again Is the resistance measured after removing the thermistor from outdoor unit PCB normal 11 gt Replace the thermistor Replace the outdoor unit PCB NITET Refer to P 369 181 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 45 High Pressure Sensor Abnormality Remote Controller Display um Applicable Models VRVIII 111 5 and III Q Series Method of Error Detection Error is detected from the pressure detected by the high pressure sensor Error Decision Conditions When the high pressure sensor is short circuit or open circuit Supposed Causes W Defective high pressure sensor system W Connection of low pressure sensor with wrong connection W Defective outdoor unit PCB W Defective connection of high pressure sensor 182 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Cauti
196. or For heat exchanger thermistor For intermediate heat exchanger thermistor For liquid thermistor For remote controller thermistor T C T C 30 361 7719 40 10 6281 25 265 4704 45 8 7097 20 196 9198 50 7 1764 15 147 5687 55 5 9407 10 111 6578 60 4 9439 5 85 2610 65 4 1352 0 65 6705 70 3 4757 5 50 9947 75 2 9349 10 39 9149 80 2 4894 15 31 4796 85 2 1205 20 25 0060 90 1 8138 25 20 0000 95 1 5575 30 16 1008 100 1 3425 35 13 0426 105 1 1614 3SA48001 AD87A001J 370 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller For discharge pipe thermistor T C kQ T C kQ 30 3257 371 65 41 4168 25 2429 222 70 34 7923 20 1827 883 75 29 3499 15 1387 099 80 24 8586 10 1061 098 85 21 1360 5 817 9329 90 18 0377 0 635 0831 95 15 4487 5 496 5712 100 13 2768 10 391 0070 105 11 4395 15 309 9511 110 9 8902 20 247 2696 115 8 5788 25 198 4674 120 7 4650 30 160 2244 125 6 5156 35 130 0697 130 5 7038 40 106 1517 135 5 0073 45 87 0725 140 4 4080 50 71 7703 145 3 8907 55 59 4735 150 3 4429 60 49 5180 3SA48006 AD87A001J http splitoff ru tehn doc html 371 High Pressure Pu Low Pressure PL 8 g
197. or disconnecting connectors or parts Caution may be damaged Check the condition of the power supply Check if power supply voltage is 380 to 415V 2 Check if there is open phase or wrong wiring 3 Check if power supply voltage side unbalance is with in 6V There are problems on the condition of power supply described above YES gt Correct the problem The insulation resistance of compressor is not more 100kQ YES gt Replace the compressor The insulation resistance of fan motor is not more 1MO YES gt Replace the fan motor If the fan motor is badly damaged replace the inverter PCB Is the power transistor normal NO Replace the inverter PCB 267 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remove and insert the connectors YES gt Replace the inverter PCB If the inverter PCB is badly damaged Turn ON the power compressor supply and start and fan motor operation are likely to get defective inverter PCB caused Stop standby before the fan rotates YES Replace the noise filter PCB Defective noise filter Stop standby when YES the compressor startup Replace the inverter PCB
198. or unit coil W Defective outdoor unit PCB W Defective thermistor connection 174 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Confirm which thermistor is abnormal using outdoor unit monitor mode Connector is connected to outdoor unit PCB Connect the connector and turn ON again Resistance is normal when measured after disconnecting the thermistor from the indoor unit PCB 11 gt Replace the thermistor Replace the outdoor unit PCB Refer to P 369 175 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 42 4 Liquid Pipe Thermistor Abnormality Remote Controller Display m Applicable Models VRVII WII WIII 1 5 and Series Method of Error Detection Error is detected according to the temperature detected by liquid pipe thermistor Error Decision Conditions When the liquid pipe thermistor is short circuited or open circuited Supposed Causes W Defective liquid pipe thermistor W Defective outdoor outside unit PCB W Defective thermistor connection 1
199. ore than 6 hours Check if the insulation resistance of the NO Cancel the melting state of refrigerant compressor is 100kQ or more YES Broken inside the VES gt Replace the inverter compressor compressor 4 Check if the power NO Replace the inverter compressor transistor is normal gt Replace the compressor inverter PCB Recheck the Refer to P 354 compressor refrigerant circuit 222 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRVII WII 11 5 WIII Series Method of Error Detection Error is detected from current flowing in the power transistor Error Decision Conditions When overload in the compressor is detected during startup Supposed Causes W Defective compressor W Pressure differential start W Defective inverter PCB http splitoff ru tehn doc html 223 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged The difference between high NO and low pressure when starting is above 0 2MPa or more
200. ore pressure restarting is 0 2MPa or below equalizing in the refrigerant circuit Inspection of the compressor Refer to P 354 215 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Lo Applicable Models VRVII WII 1 5 WIII Series Method of Error Detection Error is detected by current flowing in the power transistor Error Decision Conditions When overload in the compressor is detected Supposed Causes W Compressor overload W Compressor coil disconnected W Defective inverter PCB 216 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Output current check Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged secondary current of the inverter is higher than 16 5A Y1 YL YES Compressor power supply and 25 1 A TL power supply for each phase Compressor inspection The YES overload Inspection of the compressor and refrigerant System is required Replace the compressor s coil is disconnected Disconnect the connection between the compressor and inverter Make the power transistor check mode
201. ors or parts Caution may be damaged Are the connectors between the main NO PCB and inverter transmission wiring between the YES Connect transmission wiring and turn ON again Fix the Y outdoor outside unit PCB inverter unit is The micro computer monitor YES disconnection and turn ON again Defective Y green on the inverter PCB is blinking The voltage between 2 pins of connector on the YES outdoor outside unit main PCB or defective inverter PCB Y inverter unit is 220 240 V Replace the inverter PCB When the LC error occur again replace the control PCB Check the noise Y filter for disconnection and check the power supply wiring of the inverter PCB 230 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display we Applicable Models VRVII Method of Error Detection Check the communication state between inverter PCB and control PCB by micro computer Error Decision Conditions When the correct communication is not conducted in certain period Supposed Causes W Error of connection between the inverter PCB and outdoor unit control PCB W Defective outdoor unit control PCB transmission section W Defective inverter PCB Defective noise
202. otate the fan manually with ease when removing the connector of the YES gt Replace the corresponding fan motor Resistance value between he power supply wire YES terminal of fan motor and Replace the the motor frame corresponding i fan motor Check fan motor connector power supply wire resistance value between UVW phases of fan motor is out of balance or short circuit between UVW phases YES Replace the corresponding fan motor 123 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check fan motor connector signal wire short circuits between Vcc and GND and between UVW and GND YES gt Replace the corresponding fan motor gt Replace the PCB NITET Refer to P 378 NIIT EI Refer to P 379 124 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Applicable Models VRVII S Series Method of Error Detection Error of fan motor system is detected according to the fan speed detected by hall IC when the fan motor runs Error Decision Conditions When the fan runs with speed less than a specified one for 14 5 seconds or more when the fan motor running conditions are met
203. outdoor unit external control adaptor for outdoor unit W Defective outdoor unit PCB W Defective external control adaptor for outdoor unit 300 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting N Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged for Check 4 Check the LED lamps for Check 3 corresponding to the error code 1 and monitor mode in the Check 3 Y Check 4 830800080 9000099 t Go on to the Check 3 Y Check 4 Diagnosis Flow 1 Defective transmission caused when the external control adaptor for outdoor unit is mounted 20000000 90096099 Go on to the Check 3 Y Check 4 Diagnosis Flow 2 Transmission alarm given when the external control adaptor for outdoor unit is mounted 0000000 9ooeeoo Go on to the Check 3 Y Check 4 Diagnosis Flow 3 Abnormal transmission between the master unit and the slave unit 1 0000000 9000906090 Go on to the Check 3 Y Check 4 Diagnosis Flow 4 Abnormal transmission between the master unit and the slave unit 2 0000000 900906090 Go on to the Check 3 Y Check 4 Diagnosis Flow 5 Multi connection units 90oeeeoo 90
204. output Error of current sensor during synchronous operation IPM failure Supposed Causes W Main PCB failure Current sensor failure Drive circuit failure 197 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power supply once and then check the compressor lead wires Do the lead wires have any disconnection broken wire short circuit or ground fault YES gt Replace the lead wires Turn ON the power supply again Does the power YES supply normally gt It is supposed come back that the error ON results from external causes other than failures e g exogenous noises or Check if the power thunder transistor is normal Check if insulation resistance of the compressor is 100kQ and above Replace the outdoor unit main PCB at the same time Replace the outdoor unit main PCB 198 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 1 Check if the power transistor of the fan driver is normal YES NO Replace the
205. ove the thermistor from the indoor unit PCB and then insert it again YES Is the thermistor normal Normal The error is caused by defective contact Remove the thermistor from the indoor unit PCB and then make resistance measurement of the thermistor using a multiple meter Replace the thermistor Replace the indoor unit PCB NITET Refer to P 369 http splitoff ru tehn doc html 79 Troubleshooting by Indication on the Remote Controller 3 14 5 Thermistor for Gas Pipe Abnormality Remote Controller Display c Applicable Models All indoor models Method of Error Detection Error detection is carried out by temperature detected by gas pipe thermistor Error Decision Conditions When the gas pipe thermistor becomes disconnected or shorted while the unit is running Supposed Causes W Defective thermistor for gas pipe W Defective indoor unit PCB 80 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged from the indoor unit PCB Remove the thermistor and then insert it again YES Is the thermistor gt Normal The normal
206. p splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged External protection device is connected to terminals T1 and YES gt Actuation of T2 of the indoor Sd unit terminal protection device Check the setting state of the external ON OFF input by remote controller ON OFF input from outside mode No 12 first code No 1 has been set to external protection device input second code No 03 by remote controller YES gt Change the to 01 or 02 gt Replace the indoor unit PCB second code No http splitoff ru tehn doc html 47 Troubleshooting by Indication on the Remote Controller AC 3 2 i PCB Abnormality Remote Controller Display nma Applicable Models All indoor models Method of Error Detection Check data from Error Decision Conditions When data could not be correctly received from the E PROM of nonvolatile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes W Defective indoor unit PCB W External factor Noise etc Troubleshooting Be sure to turn off the power switch before connecting or disconnec
207. pe of the NO gt Make correct setting of DIP switch compressor inverter PCB correct Is the type of the fan NO gt Replace it with the correct compressor inverter PCB inverter PCB correct Does the preparation NO gt Replace it with the correct fan inverter PCB indication lamp on the main PCB turn OFF gt Rectify the connection wiring gt Replace the outdoor unit PCB 244 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display ru Applicable Models VRVIII Q Series Method of Error Detection This error is detected according to communications with the INV PCB Error Decision Conditions Make judgement according to communication data on whether or not the type of the INV PCB is correct Supposed Causes W Mismatching of type of PCB W Defective or no field setting after replacing main PCB 245 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is the type of the compressor inverter PCB correct NO gt Replace it with the correct compressor inverter PCB
208. power switch before connecting or disconnecting connectors or parts Caution may be damaged Imbalance in supplied voltage is in excess of 14 V YL and 10V TL 1 Open phase YES Open phase Normalize field cause Fix power supply voltage imbalance Is the voltage imbalance applied to the inverter in excess of 14 V YL and 10V TL 2 Part or wiring defect After turning the power supply OFF check and repair the main circuit wiring or hen voltage monitoring is possible parts 1 Loose or disconnected wiring between power supply and inverter Using a device capable 2 Magnetic of constant recording of contact power supply voltage disposition record power supply fusion or voltage between 3 contact is phases L1 L2 L2 poor L3 L8 L1 for about 3 Loose or one perpe week disconnected noise filter 1 Measure voltage at the power supply terminal block 2 Measure voltage at terminals L1 L2 and L3 of the diode module inside the inverter Bowers imbalance while the compressor is wer supply voltage running measure Explanation for users n accordance with notification of inspection results accompanying spare parts Give the user a copy of notification of inspection results and leave it up to him to improve the imbalance Be sure to explain to the user that there is a power supply imbalance for which DAIKIN is
209. r YES Is the high pressure switch operating value normal NO Replace the high pressure switch Are the characteristics of the high pressure sensor normal 1 YES Service Checker Connect the service checker to compare the high pressure value checked with the Service Checker and the actual measurement value by pressure sensor 1 gt Replace the high pressure sensor 100 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller pressure value and the actual measurement value by pressure NO Replace the outdoor unit main PCB The high pressure sensor is normal and the pressure detected with the PCB is also normal The high pressure has really become high V Remove the causes by which the high pressure has become high nm Note 1 Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge As to the voltage of the pressure sensor make measurement of voltage at the connector and then convert it to pressure eis ziei e pA 2 Make measurement of voltage of the pressure sensor 5V Connector for high pressure sensor Red 4 Red 3 Black High 7r pressure 2 sensor Micro computer A D input 1 White
210. r Display LI zi Applicable Models All indoor models VRVII 11 5 WII and WIII Series Method of Error Detection Detect the abnormal signal of any other indoor unit within the system concerned Error Decision Conditions When the error decision is made on any other indoor unit within the system concerned Supposed Causes W Transmission error within or outdoor outside of other system Error of electronic expansion valve in indoor unit of other system W Defective PCB of indoor unit in other system W improper connection of transmission wiring between indoor and outdoor outside unit 318 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged has been YES displayed for 2 gt Re diagnose by minutes or display after more passage of 2 minutes or more Turn ON all indoor units The Lit display blinks on the remote YES controllers of other units gt Refer to failure within the same diagnosis for refrigerant Ln error code system The 5 display blinks on the YES remote controllers of Refer to failure other units within the diagnosis for same refrigerant error code The 5 display blinks on the YES remo
211. r Replace the connecting wires and then securely connect the connectors Is the connection of Ensure correct connection U Power OFF Wiring the same as in the wiring Ensure correct diagram connection insulation resistance of the compressor is low Replace the not more than compressor 100kQ The compressor coil has disconnection of wires Restart the compressor and Power ON then check whether or Conclude the not ihe error There is a possibility of defective pressure equalizing Check the refrigerant system 110 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Has the compressor started up at high differential pressure 1 YES Defective pressure equalizing Check the refrigerant system Remove the connection between the compressor and inverter Set the power transistor check mode ON using Setting mode 2 of the outdoor unit PCB Measure the inverter Power ON output voltage 2 Note Measurement should be made while the frequency is stable output voltage _ Replace the between 3 phases is outdoor unit within x 5V inverter PCB Replace the inverter compressor 1 Pressure difference between high pressure and low pressure before starting 2 The quality of power transistors diode m
212. r is about to be disconnected Replace the outdoor unit main PCB of the SLAVE 1 gt Correct the connecting wires of the outdoor multi and then reset the power supply 307 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Diagnosis Flow 4 Check of error 3 Check of error 4 G200 00000000000 Check the connection status of connecting wires of the outdoor multi to SLAVE 2 Check if the Replace the wiring is disconnected outdoor unit main or is about to be PCB of the disconnected SLAVE 2 Y Correct the connecting wires of the outdoor multi and then reset the power supply Diagnosis Flow 5 Check of error 3 Check of error 4 G20 00000000000 Check if the outdoor unit is connected to multi system Replace the outdoor unit main PCB Y Remove the connecting wires of the outdoor multi and then reset the power supply 308 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 6 Check of error 3 Check of error 4 000 000090000000
213. ressure Sensor Red GND 3 Black D White A D input Measure DC voltage here Refer to P 372 High pressure sensor http splitoff ru tehn doc html 187 Troubleshooting by Indication on the Remote Controller 3 47 J Low Pressure Sensor Abnormality Remote Controller Display n7 LI Applicable Models VRVIII 111 5 and III Q Series Method of Error Detection Error is detected from pressure detected by the low pressure sensor Error Decision Conditions When the low pressure sensor is short circuit or open circuit Supposed Causes W Defective low pressure sensor W Connection of high pressure sensor with wrong connection W Defective outdoor unit PCB W Defective connection of low pressure sensor 188 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Confirm which low pressure sensor is abnormal using outdoor unit monitor mode 1 Set the low pressure gauge upright 2 Connect the checker for VRV to the gauge of the low pressure sensor normal Make a comparison between the voltage charac
214. roller 3 4 55 Fan Motor M1F Lock Overload Remote Controller Display Applicable Models R 22 FXA FXF FXH R 410A FXAQ FXFQ FXHQ Method of Error Detection Abnormal fan revolutions are detected by a signal output from the fan motor Error Decision Conditions When the fan revolutions do not increase Supposed Causes W Broken wires short circuits and loose connections in the fan motor harness W Defective fan motor Broken wires or defective insulation W Abnormal signal output from the fan motor defective circuit W Defective PCB W instantaneous disturbance in the power supply voltage W Fan motor lock Due to motor or external causes W The fan does not rotate due to foreign matters blocking the fan Disconnection of the connector between the high power PCB and the low power PCB 52 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power supply and then wait for a period of 10 minutes Are there any foreign matters around the fan YES gt Remove the foreign matters Is the connector for the fan motor properly connected to the indoor unit PCB 1 NO gt Properly connect the connector
215. ror Detection Detect an indoor unit with no address setting Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes W improper connection of transmission wiring between indoor outdoor units and outdoor outdoor units W Defective indoor unit PCB W Defective outdoor unit main PCB 343 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is electricity being introduce for the first time after installation or after an indoor or outdoor unit PCB has been replaced YES Does an error Occur even after 12 minutes elapses from the time when electricity is introduced to indoor and Normal outdoor and outdoor outdoor unit transmission wiring normal 1 After fixing incorrect wiring press and hold the RESET button on the outdoor unit main Press and hold the PCB for 5 RESET button on the IDE outdoor unit for 5 he unit will no seconds run for up to 12 minutes NO Does an error Neral occur YES 344 http splitoff ru tehn doc html Troubleshooting by Indication on
216. ror Detection The protection device circuit checks continuity in the high pressure switch Error Decision Conditions When there is no continuity in the high pressure switch during the compressor stops operating Supposed Causes W Defective high pressure switch W Broken of high pressure switch harness W Defective connection of high pressure switch connector W Defective compressor Defective outdoor unit PCB W Broken of lead wire 148 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged connector correctly connected to the outdoor unit PCB Connect it correctly Wait for 10 minutes after unit stops then check the following Is there continuity at the control and protection high pressure switch NO gt Replace the high pressure switch where there is no continuity If normal the resistance will be 10Q or less Is there a disconnection or insulation failure at ihe compressor YES Replace the compressor If there isa compressor error there is the possibility that the INV PCB and outdoor unit PCB have been damaged Check that each of these PCBs is normal NO gt Replace the lead continuity at
217. ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting A Caution mode Check the LED lamps for Check 3 corresponding to the error code Ur and for Check 4 in the monitor Check 3 Check 4 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 900oeeeeooooeeoo Check 3 Y Check 4 To Diagnosis Flow 1 Excessive number of indoor units connected 92090000 3 4 D To Diagnosis Flow 2 Connection of erroneous models of indoor 00000080 900090600 units Check 3 Check 4 To Diagnosis Flow 3 Combination error of outdoor 00000080 900090600 units 9 To Diagnosis Flow 4 Defective wiring in units dedicated to multi connections 322 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution be damaged Diagnosis Flow 1 Check 3 Check 4 90o0oeeeeooooeeoo The number of indoor units connected to the same refrigerant circuit system should not be more than 64 units YES Replace the outdoor unit main PCB
218. s the only way to judge as the shortage of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control As information for making a judgement refer to the information below Diagnosis of shortage of refrigerant 1 The superheated degree of suction gas rises Consequently the compressor discharge gas temperature becomes higher 2 The superheated degree of suction gas rises Consequently the electronic expansion valve turns open 3 Low pressure drops to cause the unit not to demonstrate cooling capacity heating capacity The opening degree of the indoor unit Fan control is activatad for high electronic expansion valve becomes pressure protection under larger cooling control at low outdoor Ither of the electronic expansion air temperature i e the fan is valves becomes fully open hunting at high pressure Frequency comes to the minimum High pressure i Low pressure is maintained at i i i i T High pressure drops a constant T i i with decrease in compressor capacity level Low pressure Low pressure rises as the opening degree of the indoor unit electronic expansion valve becomes larger Frequency slightly increases under the capacity control Frequency 1 1 If frequency comes to the
219. sed Causes Disconnection of connectors for electronic expansion valve W Defective electronic expansion valve coil W Defective outdoor unit main PCB 130 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn power supply OFF and turn power supply ON again Return to normal YES External factor other than error for example NO noise etc Check the electronic expansion valve corresponding to the error code 5 the monitor mode O When Check 4 shows as follows 9 Electronic expansion valve for main use O When Check 4 shows as follows ojo o o Je x x Electronic expansion valve for subcooling Master unit Explanation of Slave unit 1 9 e Slave unit 2 9 0 The connector of outdoor unit PCB for electronic expansion valve is NO Ensure correct connection The coil resistance of electronic expansion valve is normal NO Replace the electronic expansion valve Coil Replace the outdoor unit PCB 131
220. sion Valve Coil Abnormality Dust Clogging teen 68 3 10 AF Drain Level above Limit 71 3 11 5 Capacity Determination Device Abnormality inerenti 73 3 12 Transmission Error between Indoor unit PCB and Fan PCB 75 3 13 4 Thermistor for Liquid Pipe Abnormality 78 3 14 25 Thermistor for Gas Pipe Abnormality 80 3 15 4 Combination Abnormality between Indoor unit PCB and Fan PCB 82 3 16 25 Thermistor for Suction Air Abnormality 84 http splitoff ru tehn doc html VRV Series 3 17 25 Thermistor for Discharge Air Abnortmialily ofrece tee 86 3 18 Humidity Sensor System Abnormality 88 3 19 2 Room Temperature Thermistor in Remote Controller Abnormality 90 3 20 PCB Abnormality 92 3 21 Earth Leakage by Leak Detection Assy 94 3 22 3 Actuation of High Pressure Sensor 97 3 23 2 3 Abnormal Discharge Pressure 99 3 24 4 Actuation of Low Pressure Sensor 102 3 25 4 Abnormal Suction Pressure 104 3 26 5 Inverter Compressor Motor Lock 107 3 27 amp STD Compressor Motor Overcurrent LOCK quac E 115 3 28 Outdoor Unit Fan Motor Abnormality
221. ssiusueJ ZN Joopuj pue 86c u m q 40413 uoissiusueJ spun 100pino pue spun vez Joopu 10117 UOISSIUJSUEJ 100pino pue spun 68c Joopu 10117 UOISSILUSUEJ spun 100pino pue spun 982 hd Joopu 10413 uoissiusuel YN 282 pejnoex3 jou 5 en 10413 snoeuejuejsu o8z Jo Ajddns ZN A d d W Wd VN Sjuejuo 10413 PUN OMAYA S HAHA HIMCASHA SAYA Seues VOLV H 2c 33 http splitoff ru tehn doc html Troubleshooting by Remote Controller peuyepun sseippy eve Aueuuouqy uejs AS LYE e e e e e e e e e jeg Jou 5 pue 1ej oJju02 955 uoissiusUeJ 3n Jejoguoo See id sseippy on JejoJjuo pue spun Joopu cee pue
222. sure sensor n Note Replace the outdoor unit PCB 1 Make measurement of voltage of the pressure sensor Outdoor unit PCB 45V Connector for low pressure sensor Blue a Red E 8 GND I e Black o Micro computer Z A D input measurement of DC voltage between these wires Refer to P 372 103 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 25 Abnormal Suction Pressure Remote Controller Display Ta 7 Applicable Models VRV WII WIII IH S and III Q Series Method of Error Detection Abnormality is detected by the pressure value with the low pressure sensor Error Decision Conditions Error is generated when the low pressure drops while the compressor is in operation Supposed Causes W Abnormal drop of low pressure W Defective low pressure sensor W Defective outdoor unit PCB W Stop valve is not opened W Clogged filter 104 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is the stop valve open YES NO Open the stop valve
223. t T 5 2 5 5 gt 5 5 o gt Vi Output Voltage Low Side Pu High pressure MPa Low pressure MPa Voc 3 5 2 5 1 5 Output Voltage Vx V Troubleshooting by Indication on the Remote Controller Pressure Sensor 0 5 5 2 co 2224 Bene 8 3 5 1 0 372 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Broken Wire Check of the Connecting Wires 1 Procedure for checking outdoor outdoor unit transmission wiring for broken wires On the system shown below turn OFF the power supply to all equipment short circuit between the outdoor outdoor unit terminal F1 and F2 in the Outdoor Unit A that is farthest from the centralized remote controller and then conduct continuity checks between the transmission wiring terminal blocks F1 and F2 of the centralized remote controller using a multiple meter If there is continuity between the said terminal blocks the outdoor outdoor unit transmission wiring has no broken wires in it If there is no continuity the transmission wiring may have broken wires With the outdoor outdoor unit terminal of the Outdoor Unit A short circuited conduct continuity checks between the transmission wiring terminal blocks F1 and F2 of the unified ON OFF controller If there is no continuit
224. t Defective radiation fin from the power unit Blocked air suction port Stained radiation fin Turn OFF the power High outdoor air supply and then make temperature measurement of Fan propeller resistance of the for damage radiation fin thermistor Is the thermistor resistance normal 11 gt Replace the thermistor Connect and disconnect the connector for the radiation fin thermistor and then properly connect it Does the error recur when the YES power supply turns ON gt Replace the to start the compressor compressor inverter PCB 203 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Refer to P 369 gt Continue operation t is supposed that the radiation fin temperature became high due to some field factors In this connection check the following points Stained radiation fin Airflow obstructed with dirt or foreign matters Damage to fan propeller Too high outdoor air temperature 204 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display a 1 Applicable Models VRVII WII 11 5 WIII and Series
225. t the transmission wiring of the master unit centralized control equipment and then check the voltage between the transmission terminals F1 and F2 of the master unit transmission equipment using a multiple meter between the NO connection of the connector Replace the terminals F1 and F2 in the range of 15 2 to 17 6 centralized control equipment Centralized Refer to P 373 control equipment Normal It is supposed that the error results from external factors e g noises from other equipment 340 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 70 uF System is not Set yet Remote Controller Display Ln Applicable Models All indoor models All outdoor unit series Method of Error Detection On check operation the number of indoor units in terms of transmission is not corresponding to that of indoor units that have made changes in temperature Error Decision Conditions The error is determined as soon as the abnormality aforementioned is detected through checking the system for any erroneous connection of units on the check operation Supposed Causes W improper connection of transmission wiring between indoor outdoor units and outdoor outdoor units W Failure to execute check operation W Defective indoor unit PCB Stop valve is not
226. te controllers is set to MAIN YES Set one remote controller to SUB turn the power supply OFF once and then back ON All indoor unit PCB micro computer monitors blink NO Operation returns to normal when the power is turned OFF momentarily j Y Replace the remote controller There is possibility of error caused by noise Check the surrounding area and turn ON again Normal AXES gt Normal NO Y Replace the indoor unit PCB Y YE Normal 3 gt Normal NO gt There is possibility of error caused by noise Check the surrounding area and turn ON again 299 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 64 1 Transmission Error Across Outdoor Units Remote Controller Display i Lg Applicable Models VRVIII and Series Method of Error Detection Micro computer checks if transmission between outdoor units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes W improper connection of transmission wiring between outdoor unit and external control adaptor for outdoor unit improper connection of transmission wiring between outdoor units of multi outdoor unit connection W improper cool heat selection W improper cool heat unified address
227. te the unbalanced state Unbalanced voltage will For 230V units cause extremely 1 Does the power supply unbalanced voltage fall in the current thus range of 230 10 impairing the 2 Is there any open service life of or phase or erroneous resulting in the wiring in the power defective the supply line equipment 8 Is an imbalance in power supply voltage not more than 6V Disconnect the cable from the compressor and then Power check the compressor for the insulation resistance The insulation YES resistance is low i e Replace the not more than compressor 100kQ 262 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Disconnect cable from the fan and then check Power OFF the fan motor for the insulation resistance The insulation resistance is low i e not more than 1MQ YES Replace the fan motor Replace the fan driver Check the inverter power transistor Has the YES power transistor got Replace the defective inverter PCB Observe the conditions of the PCB In the case of a serious failure a compressor failure may cause the failure of the PCB Even if the PCB is replaced it may cause failure again To avoid that recheck the compressor for ground and for any broken wires Furthermore even after the completion o
228. te controllers of gt Refer to failure diagnosis for H5 error code 319 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller The i display blinks on the remote controllers of other gt Refer to failure units within the same diagnosis for refrigerant error code system YES NO gt Refer to failure diagnosis for ntu 12 error code 320 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 67 45 Improper Combination of Indoor and Outdoor Units Indoor Units and Remote Controller Remote Controller Display Applicable Models All indoor models VRVIII and Series Method of Error Detection A difference occurs in data by the type of refrigerant between indoor and outdoor units The number of indoor units is out of the allowable range Error Decision Conditions The error decision is made as soon as either of the abnormalities aforementioned is detected Supposed Causes Excess of connected indoor units W Defective outdoor unit PCB Mismatching of the refrigerant type of indoor and outdoor unit W Setting of outdoor unit PCB was not conducted after replacing to spare PCB 321 http splitoff
229. teristics and the gauge pressure Replace the low pressure sensor Is the PCB pressure detection normal Make a comparison between the checker pressure data and the voltage characteristics 1 NO gt Replace the outdoor unit main PCB 189 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 1 Reset the operation and then restart the outdoor unit characteristics of the low pressure NO Replace the low pressure sensor Replace the outdoor unit main PCB n Note 1 Voltage measurement point Outdoor unit PCB sy Connector for low pressure sensor 2 5 Red o g GND Black 2 Micro computer 2 White E A D input Measure DC voltage here NITET Refer to P 372 190 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 48 Jf Suction Pipe Pressure Sensor Abnormality Remote Controller Display w LL Applicable Models VRVII 11 5 WII and WIII Series Method of Error Detection Error is detected from pressure detected by low pressure sensor Error Decision Conditions When the suction pipe pressure sensor is short circuit or open circuit Supposed
230. than equipment error for example noise etc nm Note 1 How to delete history of error codes Press the ON OFF button for 4 seconds and more while the error code is displayed in the inspection mode 91 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller i 3 20 Abnormality Remote Controller Display Applicable Models All outdoor unit models Method of Error Detection Abnormality is detected under the communication conditions in the hardware section between the indoor unit and outdoor unit Error Decision Conditions When the communication conditions in the hardware section between the indoor unit and the outdoor unit are not normal Supposed Causes W Defective outdoor unit main PCB W Defective connection of inside outside relay wires 92 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Turn OFF the power once and turn ON again YES gt External factor Return to normal Check if inside outside YES other than error for example noise etc Connect the relay wires of outdoor u
231. the lead i wire wire gt Replace the sub PCB 149 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 33 5 Outdoor Unit Fan Motor Signal Abnormality Remote Controller Display mo Applicable Models VRVIII and Series Method of Error Detection Detection of abnormal signal from fan motor Error Decision Conditions In case of detection of abnormal signal at starting fan motor Supposed Causes W Defective fan motor signal circuit error W Broken short circuited or disconnection connector of fan motor connection cable Defective fan Inverter PCB 150 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the fan motor corresponding to the error code in the monitor mode When check 3 shows as follows o o e e e e e ran motor 1 1 When check 3 shows as follows ofo 9 Fan motor 2 M2F Identify outdoor unit based on Check 4 o oJo e e x x Explanation for 6 Master unit O Slave unit 1 9 Slave
232. the smallest operation step of the compressor With interlock setting provided when interlock circuit is turned OFF Supposed Causes Clogged water piping system W insufficient heat exchanger water W Dirty heat exchanger W Disconnected connector W Defective thermistor on the heat exchanger gas side W Defective low pressure sensor 159 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Clogged water piping System mixing in of foreign particles solenoid valve for water use YES gt Remove the clog NO Is the amount of water of heat exchanger 50 l minute or more Secure the enough water Is the heat YES exchanger dirty Clean the heat exchanger between the thermistor on the NO gt Connect the connector properly and the low pressure sensor proper 160 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller NO gt Replace the thermistor sensor if any of its characteristics are abnormal side and the low pressure sensor normal 1 Disconnect the connection between t
233. ting connectors or parts Caution may be damaged Turn the power supply OFF then the power ON again Does the System return to normal YES gt The indoor unit PCB is normal External factor other than error for example noise etc gt Replace the indoor unit PCB 48 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 3 3 Drain Level Control System S1L Abnormality Remote Controller Display e nz Applicable Models R 22 FXC FXF FXA FXK FXH Option FXM Option FXYB R 410A FXFQ FXZQ FXDQ FXMQ P FXHQ Option FXAQ Option Method of Error Detection By float switch OFF detection Error Decision Conditions When rise of water level is not a condition and the float switch goes OFF Supposed Causes W Proper power supply is not provided Defective float switch or short circuit connector Defective drain pump Drain clogging upward slope etc Defective indoor unit PCB Loose connection of connector 49 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is power supply 220 240V provided Provide 220 240V power suppl
234. tion Follow the same procedure as that for 1 Normal vacuuming and dehydration described above 2 Vacuum break Pressurize with nitrogen gas up to 0 05MPa 3 Vacuuming and dehydration Conduct vacuuming and dehydration for a period of one hour or more If the degree of vacuum does not reach 100 7kPa or less even though evacuation is conducted for a period of two hours or more repeat vacuum break vacuuming and dehydration 4 Leaving in vacuum state Leave the compressor at the degree of vacuum of 100 7kPa or less for a period of one hour or more and then check to be sure that the vacuum gauge reading does not rise 5 Additional refrigerant charge Purge air from the manifold gauge connection hoses and then charge a necessary amount of refrigerant Note n case of construction during rainy reason if dew condensation occurs in the piping due to extended construction period or rainwater or else may enter the piping during construction work 364 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller fel e List of inverter related error codes Code Name d Condition for Major cause etermining error i nstantaneous Inverter output current Liquid sealing overcurrent of exceeds 32 3A even Defective inverter instantaneously compressor Compressor current compressor Defective inverter
235. tional controllers for centralized control and indoor unit Connector for setting main controller is disconnected or disconnection of connector for independent combined use changeover switch W Defective PCB for centralized remote controller W Defective indoor unit PCB 336 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Check the indoor unit for which J is displayed Is the transmission error uf caused all indoor units YES power supply of the NO indoor unit on which the Make sure there ue occurred are no hazardous turned Situations and then turn ON the power supply ON Has the setting of centralized control group No been made with the indoor unit on which the J occurred the setting of centralized control group No be made Make correct setting of the centralized control group No the setting of centralized control Check outdoor units to which the refrigerant refrigerant System y SH iS connected 337 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller
236. to put the operation to the optimum state Symptom Supposed Cause Countermeasure 12 Dust comes Dust comes out Dust which has Normal operation out from the from the system deposited on the System when it restarts of indoor after the stop for unit is blown out an extended from the system period of time 13 Odors come In operation Odors of room The inside of the out from the cigarettes or else indoor unit should System adsorbed to the be cleaned inside of indoor unit are blown out 14 Outdoor unit In operation The reason is that Normal operation outdoor unit fan does not 15 display Immediately after The reason is that Normal operation 25 appears turning ON the the system is This code is on the power supply checking to be displayed for a remote sure the remote period of controller controller is approximately 1 normal minute at maximum 16 The outdoor After stopping It stops in order to Normal operation unit operation prevent oil or It stops after a compressor refrigerant from of or the dwelling approximately 5 to 10 minutes reduce the room temperature where possible stop 17 The outdoor While stopping The reason is that Normal operation gets hot operation the compressor is warmed up to provide smooth startup of the system 18 Hot air Hot air is felt On VRV systems Normal operation comes out while the
237. ton is depressed The system is controlled with centralized controller Blinking display indicates that the system cannot be operated using the remote controller Operate the system using the COOL HEAT centralized remote controller The system stops immediately after The system is in preparation mode Wait for a period of approximately turning ON the of micro computer 1 minute power supply operation 5 The system The remote The system stops Remove causes makes controller due to an of electrical intermittent displays error interruption in noises stops codes H and communication If these causes and the between units are removed the s caused by electrical system will system stops but restarts noises coming from automatically equipment other restart operation lapse of several than air minutes m conditioners 6 COOL HEAT The remote This remote Use a remote selection is controller displays controller has controller with disabled UNDER option to select option to select CENTRALIZED cooling operation cooling operation CONTROL The remote COOL HEAT Use the COOL controller displays UNDER CENTRALIZED CONTROL and the COOL HEAT selection remote controller is provided selection is made using the COOL HEAT selection remote controller HEAT selection remote controller to select cool or heat 13
238. tor resistance characteristics normal lt Is the outdoor air temperature more than 20 C lt Is the connector properly connected Are the thermistor resistance characteristics normal lt Does the piping length fall in the permissible range lt Conduct visual checks for pipe conditions lt Is there any temperature difference caused before and after the filter or branch pipe lt Refer to error code U1 lt Eliminate moisture by vacuum operation lt Is the heat exchanger clogged _ Decreased Defective lt Can the fan motor fan output fan motor be rotated with Decreased hands airflow the motor coil rate resistance and insulation normal Defective lt If a spare PCB is service mounted is the monitor capacity setting PCB properly made Including capacity setting High H Dirty filter lt Is the air filter airflow clogged passage resistance Obstacle lt Is there any obstacle in the airflow passage 349 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller n Note x1 For details of compressor capacity control while in cooling refer to Compressor PI control 2 The low pressure protection control includes low pressure protection control and hot gas bypass control 3 In
239. ts connected to the same refrigerant circuit system should not be more than 64 units YES Replace the outdoor unit main PCB gt The number of indoor units exceeds the standard Check the connection to correct Diagnosis Flow 2 Check 3 Check 4 Check if the refrigerant type of the outdoor unit corresponds to that of the indoor YES Replace the outdoor unit main PCB gt Match the refrigerant types of the outdoor unit and the indoor unit 328 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Diagnosis Flow 3 Check 3 Check 4 9 O e e e if the outdoor unit PCB is replaced with PCB for spare parts Check if the unit is not connected to outdoor units of different models NO Replace the outdoor unit main PCB Check the model of the outdoor unit Isa NO correct spare PCB gt Replace it with procured the correct spare PCB Check if NO the spare PCB setting is correct gt Correct the setting to reset the power gt Replace the spare PCB 329
240. ue for 2 seconds Supposed Causes Stop valve is not opened Obstacles at the air outlet Improper power voltage Defective magnetic switch Defective compressor Defective current sensor http splitoff ru tehn doc html 115 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged Is NO the stop valve gt Open the stop open valve Remove the obstacle Is the power NO supply voltage Correct the normal power voltage Is the NO magnetic switch gt Replace the normal magnetic switch YES Check the wiring from power supply current sensor MgS compressor Is above NO wiring correct Correct wiring YES Is current sensor correct Replace the corresponding current sensor Replace the compressor 116 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller 3 28 2 Outdoor Unit Fan Motor Abnormality Remote Controller Display cr Applicable Models VRVIII and Series Method of Error Detection Detect an error based on the current value in the inverter PCB as for motor 2 current value in the fan PCB Det
241. un LA VINOOL E adh pepuedsns VINOS vor ONXJ ed 100 4 vWe9 VINOS vor wwze VINSZ VOZ O1X4 ed Buipueis 20014 9 VINOS vor wwze VIWOZ OYX4 d L pejunoy IEM VINOOL weg wee OHX4 ad pepuedsns 6 0 2 VINOOC OWX4 ed jong dSZL 400 08 deg dOS aze dsc doz OWXJ pr cu e wsz Wos weg Wos Wov woz edA urging anos 8 9 anos anor _ gaze 8392 8302 LaAadOaxX4 gaze 8892 8802 6 VEO vWOr ynze DOXA ed 1 9 pejunoy 82 wos weg wos Wor woz DOX4 ad egesse payunoyy Bulao 309 wWor Wee woz OZX4 pny ed yasseg payunoyy Buy 392 300 08 de9 05 asz OJX4 punoy adh payunoyy Bulag joquwis adh suum
242. unning under drooping control Use the above values as a guide Depending on the other conditions the unit may be normal despite the values within the above range 358 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Check for overcharge of refrigerant In case of VRV Systems the only way to judge as the overcharge of refrigerant is with operating conditions due to the relationship to pressure control and electronic expansion valve control As information for making a judgement refer to the information below Diagnosis of overcharge of refrigerant 1 High pressure rises Consequently overload control is conducted to cause insufficient cooling capacity 2 The superheated degree of suction gas lowers or the wet operation is performed Consequently the compressor becomes lower in discharge pipe temperature despite of pressure loads 3 The subcooling degree of condensate rises Consequently in heating the temperature of discharge air through the subcooling section becomes lower Cooling High pressure drooping control High pressure Frequency comes to gradually rises with the minimum level increase in frequency Subcooled degree becomes higher Liquid connection pipe temperature lowers High pressure Low pressure is maintained at a constant
243. vacuuming and dehydration 1 Vacuuming and dehydration Use a vacuum pump that enables vacuuming up to 100 7kPa 5 torr 755 mmHg Connect manifold gauges to the service ports of liquid pipe and gas pipe and run the vacuum pump for a period of two or more hours to conduct evacuation to 100 7kPa or less If the degree of vacuum does not reach 100 7kPa or less even though evacuation is conducted for a period of two hours moisture will have entered the System or refrigerant leakage will have been caused In this case conduct evacuation for a period of another one hour If the degree of vacuum does not reach 100 7kPa or less even though evacuation is conducted for a period of three hours conduct the leak tests 2 Leaving in vacuum state Leave the compressor at the degree of vacuum of 100 7kPa or less for a period of one hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage may have been caused 3 Additional refrigerant charge Purge air from the manifold gauge connection hoses and then charge a necessary amount of refrigerant 363 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Special vacuuming and dehydration In case of moisture may get mixed in the piping 1 Vacuuming and dehydra
244. value of discharge pipe thermistor NO Replace the outdoor unit main PCB Discharge pipe thermistor is normal and the temperature detection of the main PCB is also normal Actually the temperature of discharge pipe is high WV Remove the factor of overheat operation 137 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller m Note 1 Compare the resistance value of discharge pipe thermistor and the value based on the surface thermometer Refer to P 351 Refer to P 369 138 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display Due Applicable Models VRV WII and WIII Series Method of Error Detection Abnormality is detected according to the temperature detected by the discharge pipe thermistor Error Decision Conditions W When the discharge pipe temperature rises to an abnormally high level W When the discharge pipe temperature rises suddenly Supposed Causes W Defective discharge pipe thermistor W Defective connection of discharge pipe thermistor W Defective outside unit PCB 139 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubles
245. ve the factor of In heating mode decreasing low Reset the operation using the remote controller pressure by then restart referring to 2 temperature difference between the suction pipe and the heat exchanger is 20 C and over Check if the property of suction pipe thermistor and heat exchanger thermistor are normal 3 Replace the YES thermistor Replace the outdoor unit main PCB gt Remove the factor of superheating by referring to CHECK 251 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller n Note 1 Check the low pressure value by using pressure gauge in operation 2 Compare the actual measurement value by pressure sensor with the value by the pressure gauge To gain actual measurement value by pressure sensor measure the voltage at the connector between 2 3 and then convert the value into pressure 1140 604 3 Compare the thermistor resistance value with the value on the surface thermometer Refer to P 348 Refer to P 351 Refer to P 372 252 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Remote Controller Display i LII Applicable Models VRV WII and WIII Series Method of Error Detect
246. witch opens Error Decision Conditions Error is generated when the high pressure switch activation count reaches the number specific to the operation mode Supposed Causes Actuation of outdoor unit high pressure switch W Defective high pressure switch W Defective outdoor unit PCB W instantaneous power failure W Defective high pressure sensor 97 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts Caution may be damaged pressure switch NO Connect the connectors connected pressure switch YES connector and operate again or pressure switch is open Operation is fiormal when turned YES Actuation of high pressure switch 91 ON again by remote controller gt There was an instantaneous power failure or a past safety device actuated Re check the refrigerant System nm Note 1 Actuation of high pressure switch gt Replace the outdoor unit PCB The outdoor unit PCB connector is disconnected Is the outdoor unit heat exchanger dirty Defective outdoor unit fan Is the refrigerant overcharged Defective high pressure sensor 98 http splitoff ru t
247. y float switch is connected to connector of the indoor unit PCB A short circuit connector is connected to PCB Connect either a short circuit connector or float Switch and turn YES YES ON again is forming a short circuit continuity check with connector disconnected normal connector of the indoor unit PCB is short Defective indoor unit PCB YES Loose the connection of connector Water builds NO up in the drain pan The float switch functions Replace the float normally i switch Modify the float switch s connection and turn ON again connected to NO connector terminals of the indoor unit gt Connect the drain pump and turn ON again 50 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller drain pump works when the power supply is reset for the indoor unit YES Check the drain piping for clogging or upward slope etc of terminals Y1 and Y2 or connector is 220 240 V within 5 minutes of resetting the power supply NO Replace the gt Replace the drain pump or check for dirt etc indoor unit PCB http splitoff ru tehn doc html 51 Troubleshooting by Indication on the Remote Cont
248. y as well conduct continuity checks between the outdoor outdoor unit terminal of the Outdoor Unit E between the outdoor outdoor unit terminal of the Outdoor Unit D between the outdoor outdoor unit terminal of the Outdoor Unit C in the order described thus identifying the place with continuity If the place with continuity can be identified there may be broken wires in places before the said place with continuity 2 Procedure for checking indoor outdoor unit transmission wiring for broken wires for checking the indoor outdoor unit transmission wiring of the Outdoor Unit C for broken wires Turn OFF the power supply to all equipment short circuit between the indoor outdoor unit terminal F1 and F2 in the Outdoor Unit C and then conduct continuity checks between the transmission wirings F1 and F2 of the Indoor Unit a that is farthest from the 373 http splitoff ru tehn doc html Troubleshooting by Indication on the Remote Controller Outdoor Unit C using a multiple meter If there is continuity between the said transmission wirings the indoor outdoor unit transmission wiring has no broken wires in it If there is no continuity the transmission wiring may have broken wires With the indoor outdoor unit terminal of the Outdoor Unit C short circuited identify the place with continuity in the transmission wiring of the Indoor Unit b transmiss

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