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TEST RUN SERVICE MANUAL

1. item code Item Setting data No Description IL 1B Forced thermostat ON 0000 5 minutes E time 0001 4 minutes 010 10 C ve Boslinadiseh 009 9 C j ooling discharge He I2 temperature shift T 7 5 0010 10 C 010 10 C TE 009 9 C I eating discharge E aa ven temperature shift DE g 0010 10 C 0001 1 C ie Temperature shift for 0002 2 C UZ cooling heating change 0003 3 C in Auto Heat Cool mode 2 2 0007 7 C IE 0018 18 C Lower limit at time of shipping Upper limit i 3 a i el L c a it 2 0029 29 C ower limi 0030 30 C Upper limit at time of shipping 4 1 0016 16 C Lower limit at time of shipping 5 0017 17 C Upper limit D dd I 0029 29 C Lower limit Change to remote 3 ET En control 0030 30 C Upper limit at time of shipping 32 temperature 0018 18 C Lower limit at time of shipping setting range 0019 19 C Upper limit pa 8 Dm tT 0029 29 C dwerg 0030 30 C Upper limit at time of shipping ar Te 0017 17 C Lower limit at time of shipping cee 8 0018 18 C Upper limit 3 a 2 Dn a 2 0026 26 C Lower limit lt 0027 27 C Upper limit at time of shipping Aid Humidifier operation Memel 1 p 0001 Ignore heat exchanger temperature conditions lt r Filter CN70 input 0000 Filter input dif
2. e Ceiling lt Procedure gt Stop the system before performing these steps Open the electrical component box cover then check the indoor unit control PCB Fig 2 6 Connect the jumper connector 2P yellow which was supplied with the accessory to the correct connector pin on the indoor unit control PCB according to the setting number which was confirmed in Table 2 Table of DC Fan Motor Tap Settings e If the setting No is 1 then connect the jumper connector to the connector pin TP1 2P red on the indoor unit con trol PCB e If the setting No is 3 then connect the jumper connector to the connector pin TP3 2P yellow on the indoor unit control PCB 1 Way Cassette lt Procedure gt Be sure to turn OFF the main power source before performing the steps below Open the electrical component box cover then check the indoor unit control PCB Fig 2 6 Connect the jumper connector 2P yellow which was supplied with the accessory to the correct connector pin on the indoor unit control PCB according to the setting number which was confirmed in Table 3 Table of DC Fan Motor Tap Settings e When using with the high ceiling settings Connect the jumper connector to the connector pin TP1 2P red on the indoor unit control PCB e When using with the discharge grille purchased separately attached 2 way lowered ceiling system Connect the jumper connector to
3. Item Setting data Item code No Description DC fan tap Purpose operating mode 0000 Standard Standard setting at time of shipping High ceiling use High ceiling setting 1 with standard panel Fan tap setting 0001 For low Ultra long life filter oil guard panel ammonia Fan tap change static pressure deodorizing filter optical regenerative deodorizing in order to prevent filter filter 7 dropinair High ceiling use High ceiling setting 2 with standard panel lid discharge caused 5 by filter Antibacterial high performance filter 90 installation For low Antibacterial high performance filter 65 0003 Static pressure Air cleaning unit air cleaning unit optical filter regenerative deodorizing filter deodorant activated charcoal filter For air blocking For 3 way discharge when discharge duct is material connected For air blocking 0006 materi l For 2 way discharge 0000 No humidifier output 0001 1 sec Humidifier ON 0002 2 sec EE time IL ON time per 60 l l seconds 0058 58 sec 0059 59 sec 0060 Continuously ON Cre Repeat timer 0000 Function disabled dd switching 0001 Function enabled zm Timer function 0000 Function disabled Du ihi I change prohibit 0001 Function enabled Do Smudging control 0000 No smudging control Setting the Flap 0000 Air discharge Flap 1 XX 90 Flap position en port 9 Motor No 4 Electrical mim 0001 E 2 component P se 1 AL
4. Cooling e Short circuiting this pin on HOT side during ordinary operation changes the mode to Heating Test 2P plug white CNO48 e This pin is used to test the PCB at the factory e When the power is turned ON after this pin has been short circuited all output signals will be output in sequence Sequential output does not occur if this pin is short circuited when the power is already ON Releasing this pin returns the unit to normal control CHK Test Run 2P plug white Test run pin CNO49 e Test run mode is operated while short circuit Snowfall sensor CN057 3P plug red With the Relay ON the outdoor fan circulates NOTE regardless of the compressor s running and stop 1 Ensure that the wiring length between the outdoor unit Power source control PCB and Relay is less than 2m Lead wire with 3P socket service parts available part code CV9231851818 SNOW 2 Select the Relay that is the mimimum load 0 1mA for the CNO57 contact specifications 3 Install the air discharge chamber in the area of outdoor air temperature lower than approx 0 C and also when operating in the cooling mode all through the year Sample Wiring Outdoor unit control PC Board SN q When operating in the snow sensor mode the unit will LT not operate by the effect of the freeze prevention External contact Snowfall sensor field supply 4 4 2WAY
5. 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis E16 Alarm Ramone fed Automatic address setting alarm too many units Alarm conditions e The number of indoor units was too many when automatic address setting was performed e After initial communications were completed an unrecognized unit was detected Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW S004 S005 on the outdoor unit PCB is less than the number set 2 The inter unit control wiring is wired incorrectly Check 1 Refer to the test run servicing materials and check the number of indoor units that is set EEN 2 Check the inter unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit guantity setting or the inter unit control wiring perform automatic address setting again E20 Alarm Alarm code E20 Alarm meaning No indoor units at automatic address setting Alarm conditions When automatic address setting was performed no indoor units were recognized Probable cause 1 The inter unit control wiring from the outdoor unit to the indoor units has been cut E24 Alarm Alarm code Outdoor unit INV failed to receive communication from other outdoor unit constant speed Alarm conditions After initial communications were completed communications from an outdoor unit stopped Probable cause 1 After initial communications were completed the control wiring between
6. a j Era Eie Gave Cooling heating change Fig 6 1 lt Operation gt The MODE button can be used to change between heating and cooling operation e The display indicates the operating mode of the indoor unit with the lowest unit No All units test run Fig 6 2 lt Operation gt The CHECK button can be used to start and stop a test run for all units e To start press and hold the button for 4 seconds During the test run Test is displayed e The status of test runs performed from the indoor unit remote controller is not displayed on the outdoor unit maintenance remote controller Double speed e Do not use for actual operation Doing so may damage the devices lt Operation gt The timer button 4 can be used to change between double speed and normal operation e During double speed operation the SLEEPING MODE Be mark is displayed i ox mm STR EIE IC v 6 3 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller B Display functions e The item codes can be changed with the A and TY buttons Item code Item Remarks og Outdoor unit alarm Alarm code display gl No of connected indoor units Quantity ae Unit
7. Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury or death Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause overheating at connection points and a possible fire hazard Provide a power outlet to be used exclusively for each unit and a power supply disconnect circuit breaker and earth leakage breaker for overcurrent protection should be provided in the exclusive line Provide a power outlet exclusively for each unit and full disconnection mean having a contact separation in all poles must be incorporated in the fixed wiring in accordance with the wiring rules To prevent possible hazards from insulation failure the unit must be grounded When Transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminum fins on the air conditioner can cut your fingers When Installing Ina Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors CAUTION Keep the fire alarm and the air outlet at least 1 5 m away f
8. For inspection 14 34 54 CT2 15 35 55 For inspection 16 36 56 For inspection 17 37 57 Discharge temp 3 18 38 58 CT3 19 39 59 For inspection Indoor unit sensors 1A 3A 5A For inspection Intake temp 1B 3B 5B Heat exchanger gas 3 E1 1C 3C 5C Heat exchanger liquid 3 E2 1D 3D 5D Low pressure sensor temp E3 1E 3E 5E Suction temp 1F 3F 5F Oil 1 Discharge temp 20 40 60 Oil 2 Discharge temp setting ai 41 61 Oil 3 Position of indoor unit electronic control valve 22 42 2 15 62 For inspection MEMO 2 16 2WAY SYSTEM Trouble Diagnosis Contents 3 Trouble Diagnosis 1 Contents of Remote Controller Switch Alarm Display iss ee EA EE EER Ke 3 2 2 Outdoor Unit Control PCB LED Display arseen ke id ss ed Gee nnen ken kijken es de dienen 3 4 3 2WAY Alarm Codes ese Ses SOEKE ERG Ee oue Oe GEE KERE ee WE Ge EE ge ren innit 3 5 4 Blinking Inspection Display on the Remote Controller nanne nennen Gee 3 26 3 1 2WAY SYSTEM Trouble Diagnosis 1 Contents of Remote Controller Switch Alarm Display ON O Blinking OFF Wired remote control display Wireless remote controller receiver display Possible cause of malfunction RM 1 12 MAT Oo Hip Seri
9. MOV4 pulse STEP th Heat exchanger gas 3 C ic Heat exchanger liquid 3 C id Low pressure sensor temp C iE Suction temp C IE Om C em Oil C ef O38 C de Actual operating frequency Hz Z NOTE OA and subsequent items are outdoor unit data OA 22 are for unit No 1 2A 42 are for unit No 2 4A 62 are for unit No 3 62 89 are for unit No 4 6 7 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller 1 5 Outdoor Unit Alarm History Monitor Recalls and displays the outdoor unit alarm history This is for the outdoor unit only Indoor unit alarms cannot be recalled e The indoor unit alarm history can be viewed on the indoor unit remote controller or other controller lt Operation procedure gt Press and hold the 4 CHECK button and SET button simultaneously for 4 seconds or longer to engage outdoor unit alarm history mode During temperature monitoring illuminates The display and operations are the same as for the alarm history monitor performed from the indoor unit remote controller However the unit No display shows the outdoor unit address Press the UNIT button and select the outdoor unit for which to monitor the alarm history Press the temperature setting 4 _ and CD buttons and select the item code for the alarm history The selected outdoor unit address the item code and the alar
10. Only for d way wa box Nex 5 Cassette type pate Flap Flap 2 Flap 4 3 0003 adjustment for ME pa No 3 z 4 Setting the Flap 0004 up down ai airflow direction E dA ati ooog TOW direction Flap 3 XX 92 A 4 Only for 4 way Motor No 1 Cassette type 0006 Rn Setting data Flap position during operation When the flap position is set to 4 5 and th itis in th Setting the Flap LIE rari Without separate setting asen Separately Z cooling or dry mode the flap a Only for 4 way LILI Li d Swing position is moved to 3 and the Cassette type it fi Move to position T and stay operation is started BAAS E Setting the Flap Huug Move toposiion Eland stay Tha flap swings during the ae Separately LILI GY Move to position S and stay operation under Setting the Jo lee EA FIG Move to position and stay Flap Separately AN AC Move benen At this time the unselected flaps LI LIE P 4 are moved to the position 1 2 10 3 Detailed Settings Function Selecting the DC fan motor tap when setting with the remote controller lt Procedure gt Stop the system before performing these steps Press and hold the A GET and 8 buttons simultaneously for 4 seconds or longer If group control is in effect press the UNIT button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating Use the temper
11. e f correct operation is not possible a error code is displayed on the remote controller LCD display Refer to Table of Self Diagnostic Functions and correct the problem 4 After the test run is completed press the button again Check that TEST disappears from the LCD display e To prevent continuous test runs this remote controller includes a timer function that cancels the test run after 60 minutes e The operation is possible even if the cassette type ceiling panel has not been installed PO9 display does not occur 2 2 2 Simple Settings Function Simple Settings Function e This allows the filter lifetime operating mode priori ty change central control address and other set tings to be made for an individual or group control indoor unit to which the remote controller used for simple settings is connected When this function is engaged operation stops at the individual or group control indoor unit to which the remote controller for simple settings is connect ed lt Procedure gt Press and hold the and 3 buttons simultaneously for 4 seconds or longer Gan unit No 4 or ALL in the case of group control item code j and settings data 4 XX are displayed blinking on the remote controller LCD display Fig 2 1 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If group control is in ef
12. ALL the item code and number DN value in the table and the setting data 8 digits The setting data is displayed in 8 digits The display changes between the first 4 digits Fig A and the last 4 digits Fig B When the first 4 digits are displayed the top dot of the colon is illuminated To exit setting mode press the CHECK button O A and B are displayed alternately Example shows display of 0000 0001 ng Parameter Description SET DATA 0000 Sensor input not present Control is performed 0001 Sensor input present Control is performed 0002 Sensor input not present Control is not performed 0003 Sensor input present Control is not performed fi Snowfall sensor usage l 0000 Disabled 0001 Quiet mode 1 hi Outdoor unit fan Quiet mode 0002 Quiet mode 2 0003 Quiet mode 3 0004 Quiet mode 4 0000 0 0001 40 0004 70 0007 100 0008 120 0009 140 0010 160 0011 200 0012 1 no limit Ont aa a Demand 1 current 0000 0 0001 40 0004 70 0007 100 0008 120 0009 140 0010 160 0011 200 0012 1 no limit od Demand 2 current aa 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller E Setting mode 2 Press and hold the CHECK button SET button and the CANCEL button simultaneously for 4 seconds or longer
13. O Check that there are no indoor units where the system address was already incorrectly set by manual O or automatic address setting e When automatic address setting is started from the outdoor unit control PCB or from the remote controller SIY SETTING appears on the remote controller at units where the inter unit control wiring and remote con troller wiring are connected correctly LED 1 and 2 on the outdoor unit control PCB blink alternately e In the case of indoor unit group control if there is a mistake in the group control wiring addresses may not be set even if ami SETTING appears e Even if alarm E15 or E16 appears addresses are set at those indoor units which could be verified The set addresses can be checked using the wired remote controller e If one of the below alarms appears when the remote controller is operated after automatic address setting was completed LED 1 and 2 on the outdoor unit control PCB are turned OFF follow the instructions in the table below and correct the problem location Remote controller Cause display Nothing is The remote controller is not connected correctly power trouble displayed The indoor unit power was cut off after automatic address setting was completed The remote controller is not connected correctly remote controller receiving trouble E01 The remote controller of an indoor unit where the indoor unit address is not set is inadvertently ope
14. Press the temperature setting Ca J and CY buttons to change the item code The item codes and setting data are shown in the table below Press the timer time 4 and x buttons to change the setting data To confirm the changed setting data press the SET button At this time the SET DATA display stops blinking and remains lit During this mode SET DATA is displayed blinking The display shows the set outdoor unit address System XX YY System XX System address YY Address at outdoor unit sub bus item code number DN value in the table below and the setting data 8 digits The setting data is displayed in 8 digits The display changes between the first 4 digits Fig C and the last 4 digits Fig D When the first 4 digits are displayed the top point of the colon is illuminated To exit setting mode press the CHECK button Returns to normal display mode ES we EREN aa ON meej LI Refrigerant type C and D are displayed alternately Example shows 0000 0410 R410A List of Item Codes Parameter Description SET DATA 0 Disabled 400 14HP type 224 8HP type 450 280 10HP typel 500 355 12HP type Outdoor unit capacity 2
15. The valve must be replaced Example PT Notes 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis HO7 Alarm Alarm code HO7 No oil alarm Alarm conditions This alarm occurs when oil does not flow for a specified amount of time in tubing where oil flow constantly The presence of oil is detected by a temperature sensor Judgment method Tcal calculated by the formula below from the oil temperature is compared with the discharge temperature If Tcal is higher than the discharge temperature then oil is judged to be present If Tcal is lower than the discharge temperature oil is judged to be not present Tcal 0 0254 T_oil LP 0 0298 T_oil LP 0 8842 T_oil 2 9953 LP 11 091 LP 436 94 2 9953 HP 11 091 HP 436 94 0 0254 HP 0 0298 HP 0 8842 These points are calculated from the oil temperature and compared with the discharge temperature High pressure Lower than the disc eet temperature No oil Discharge temperature Higher than the discharge temperature Oil present R oOil temperature Probable cause Insufficient amount of oil in the system 1 The length of system tubing exceeds the allowable tubing length 2 The difference in height between system units exceeds the allowable value 3 A large amount of oil was drained when a compressor was replaced 4 Oil has accumulated in a stopped outdoor unit and has not returned as a result of refrigerant circuit clogging o
16. e Control is not possible when a communications system alarm has occurred Automatic backup mode is not engaged in order to avoid causing secondary damage 3 26 2WAY SYSTEM Trouble Diagnosis 4 Blinking Inspection Display on The Remote Controller Blinking inspection display 2 compressor magnet SW seizing detection Alarm code Blinking inspection display Alarm meaning Compressor magnet SW seizing detected Status Although an outdoor unit exists where the outdoor unit fan is running no compressors in the system are operating yy Because the fan is running only at the outdoor unit where seizing was detected check the corresponding outdoor unit The fan may also run on its own when fan cracking prevention control is in effect or when snowfall sensor input is present Therefore monitor for approximately 10 minutes if the outdoor unit fans are operating at multiple units Alarm conditions Current is detected in the CT circuit when the compressor is stopped 1 This control is not engaged for the first 30 seconds after the compressor turns ON OFF 2 For 1 minute following the first 30 seconds after the compressor turned ON gt OFF the threshold for the detected current is 10 A or more continuing for 2 seconds 3 All times other than the above e If the low pressure SW has not activated the threshold for the detected current is 7A or more continuing for 5 seconds e If the low pressure switch has activated the thresh
17. 1 2 OFF To set the number of indoor units that are connected to the outdoor unit to 13 on the outdoor main unit control PCB set the No of indoor units DIP switch S005 to 1 2 m m P and set the rotary switch S004 to 3 9 1 2 3 OFF Turn on power to all indoor and outdoor units in the system Short circuit the automatic address pin at the outdoor main unit CN054 for 1 second or longer then release it Communication for automatic address setting begins To cancel again short circuit the automatic address pin CNO54 for 1 second or longer then release it The LED that indicates automatic address setting is in progress turns OFF and the process is stopped Be sure to perform automatic address setting again Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF 1 Next turn the power ON only for the indoor and outdoor units of the next different system Repeat steps 1 5 in the same way to complete automatic address settings for all systems 1 Operation from the remote controllers is now possible To perform automatic address setting from the remote controller perform steps 1 5 then use the remote controller and complete automatic address setting Refer to Automatic Address Setting from Remote Controller 2WAY SYSTEM Address Settings 3 Auto Address Setting Case 3A Automatic Address Setting in Heat
18. 3 D op D 5 D Oo S v v alala lea Ie la S S TI wo id 3 WAY SYSTEM 2 Outdoor Unit Control Panel LED Display Trouble Diagnosis OON xt Blinking OFF LED RED Display meaning After the power is turned ON and automatic address setting is not in progress no communication with the indoor units in that system is possible After power is turned ON and automatic address setting is not in progress 1 or more indoor units are confirmed in that system however the number of indoor units does not match the number that was set Automatic address setting was completed successfully After the power is turned ON and automatic address setting is not in progress the number of detected indoor units connected to that system matches the number that was set and regular communications are occurring Automatic address setting is in progress At time of automatic address setting the number of indoor units did not match the number that was set Alarm display Ed LED 1 blinks M times then LED 2 blinks N times The cycle then repeats Blinking alternately M 2 Palarm 3 Halarm 4 Ealarm 5 F alarm 6 L alarm N Alarm No Example LED 1 blinks 2 times then LED 2 blinks 17 times The cycle then repeats Alarm is P17 3 Remote Controller Servicing Functions Sensor temperature display function displayed both when unit is running and stopped e Use the following check procedure to
19. different system short circuit the automatic address pin CN054 for 1 second or longer then release it y Repeat the same steps to complete automatic address setting for all units 8 Operation from the remote controllers is now possible To perform automatic address setting from the remote controller perform steps 1 5 then use the remote controller and complete automatic address setting Refer to Automatic Address Setting from Remote Controller 1 8 2WAY SYSTEM Address Settings 3 Auto Address Setting Case 3B Automatic Address Setting in Cooling Mode Indoor and outdoor unit power cannot be turned ON for each system separately In the following automatic setting of indoor unit addresses is not possible if the compressors are not operating Therefore perform this process only after completing all refrigerant tubing work Automatic address setting can be performed during Cooling operation Automatic Address Setting from Outdoor Unit 1 5 Automatic Address Setting from the Remote Controller Selecting each refrigerant system individually for automatic address setting Automatic address setting for each system Item code A1 1 Press the remote controller timer time 4 button and button at the 2 Next press either the temperature setting Ca D or Cv button PROGRAM PROGRAM sa Mm sm a v HC UNIT 3 Use either the CUNT or _f __ button to set the system No to perfo
20. on the Short circuit the automatic outdoor main unit PCB address pin CN054 on the T OEF the ind At the same time short circuit the outdoor main unit PCB for 1 d td me alt oor Are LEDs 1 and 2 on the automatic address pin CNO54 for 1 Second or longer then release it AN F az outdoor unit PCB OFF second or longer then release it Refer to Table of 3 3 Self Diagnostic Functions and YES Start indoor and outdoor unit Description of Alarm Displays heating operation LED 1 and 2 blink alternately Start indoor and outdoor unit cooling operation LED 1 and 2 blink alternately Check the alarm contents 2 Aminimum of 5 hours must have passed after the power was turned ON to the outdoor unit 3 All indoor units operate in all refrigerant systems where the power is ON Are LEDs 1 and 2 on the NO outdoor unit PCB OFF Check that test run preparation is OK Do not allow the short circuited pins to remain short circuited Set the wired remote controller for test run Refer to the remote controller test run settings Check and make corrections according to Table of Self Diagnostic Functions Does system operate YES Return remote control to normal mode End test run 2 Settings of Indoor Unit Control PCB Examples of the No of indoor units settings S005 S0
21. 1 OFF ON OFF 1 ON OFF OFF 7 EE RE 2 OFF ON OFF 29 9 OFF ON OFF 3 ON ON OFF 30 0 OFF OFF ON 4 OFF OFF ON 31 1 OFF OFF ON ee 39 9 OFF OFF ON 40 0 ON OFF ON 41 1 ON OFF ON a 49 9 ON OFF ON 50 0 OFF ON ON 51 1 OFF ON ON ee oe 59 9 OFF ON ON 60 0 ON ON ON 61 1 ON ON ON 62 2 ON ON ON 63 3 ON ON ON 64 4 ON ON ON MEMO 4 6 2WAY SYSTEM Self Diagnostics Function Table Contents 5 Self Diagnostics Function Table 1 Self Diagnostics Function Table si noen ek se SR ee deni we ee ke ge Oe ew ed 5 2 5 1 1 Self Diagnostics Function Table Self Diagnostics Function Table 2WAY SYSTEM Self Diagnostics Function Table e Causes and corrections in instances when automatic address setting cannot be started Trouble Cause and correction The power LED D515 on the outdoor unit control PCB does not turn ON Check for any errors in the power wiring to the outdoor unit and check for a missing phase LED 1 and 2 on the outdoor unit control PCB do not turn OFF when the outdoor unit power is turned ON and automatic address setting cannot be started An alarm appears immediately when automatic address setting is started from the wired remote controller Check the Alarm Display table and correct the problem See page 3 2 to 3 4 Nothing happens when the operator attempts to start automatic address setting from the wired remote contro
22. 2 The refrigerant has accumulated in the circuit and has not returned to the compressor Refrigerant has accumulated in a location of one way flow and cannot escape High pressure level is low resulting in poor flow of refrigerant in the circuit A lower high pressure level results in a smaller difference between low pressure and high pressure that may be insufficient to cause refrigerant flow 3 The refrigerant circuit has become closed and refrigerant has not returned to the compressor In some cases when moisture enters the refrigerant circuit it can freeze at the low pressure locations and the resulting ice can block the circuit If the alarm occurs when there is sufficient refrigerant in the system 1 and 3 liquid refrigerant has definitely accumulated somewhere in the system Liquid refrigerant generally accumulates in high pressure locations In this case the high pressure gradually increases however it may not increase if the location where the liquid accumulates is sufficiently large Depending on the refrigerant saturation temperature it may also accumulate in low pressure locations In this case the high pressure is unlikely to increase Check 1 Check that the service valve is open 2 Check that none of the valves solenoid valves mechanical valves in the main refrigerant circuit is closed due to an operation failure 3 Check that there is no possibility of foreign objects or water having entered the refrigerant c
23. 71MR1E5 0013 90 Type 90 0015 112 Type 106 0017 140 Type 140 0018 160 Type 160 0021 224 Type 224 0023 280 Type 280 0001 Unit No 1 0002 Unit No 2 u address 2 2 0030 Unit No 30 0099 Not set 0001 Unit No 1 0002 Unit No 2 Indoor unit 0003 Unit No 3 4 address l 0064 Unit No 64 0099 Not set 0000 Individual 1 1 Indoor unit with no group wiring ei se 0001 Main unit One of the group control indoor units D contro 1 address 0002 Sub unit All group control indoor units except for main unit 0099 Not set 010 Shifts intake temperature by 10 C 009 Shifts intake temperature by 9 C l l Cooling 001 Shifts intake temperature by 1 C 171 intake 0000 No intake temperature shift dd temperature shift 0001 Shifts intake temperature by 1 C l l 0009 Shifts intake temperature by 9 C 0010 Shifts intake temperature by 10 C Automatic 0000 Function disabled stop time i i 7 after 0001 Stops automatically 5 minutes after operation starts operation 0002 Stops automatically 10 minutes after operation starts Ta start LI Can be set 0123 Stops automatically 615 minutes after operation starts a 0124 Stops automatically 620 minutes after operation starts 0125 Stops automatically 625 minutes after operation starts 2 7 2WAY SYSTEM Remote Controller Functions 3 Detailed Settings Function
24. Connect outdoor maintenance remote controller to RC socket on outdoor unit main control PC board and check alarm messages See operational status 2 2 Discharge temperature is over 80 C in stop mode and does not decrease Connect outdoor maintenance remote controller to RC socket on outdoor unit main control PC board and check alarm messages Replace discharge temperature sensor 2 3 Demand value always stays low The value is lower than 70 Excluding 1 unlimited Connect outdoor maintenance remote controller to RC socket on outdoor unit main control PC board and check alarm messages s over 70 Increase values 2 4 DEMAND or EXCT demand control is applied Turn OFF OPEN 3 1 3 Control equipment Demand setting is made by control units P AIMS Seri Para I O unit for outdoor unit Seri Para I O each indoor unit Turn OFF 4 1 4 System When operating in cooling including auto cooling amp heating and dry mode lowest temp of indoor E1 E2 and E3 sensor is less than 2 C under anti freeze control Wait until more than 2 C reaches 4 2 During defrosting operation Wait for a few minutes to 10 minutes or so 4 3 e According to the type of models the indoor sensors will not be supplied in some cases Outdoor unit PC board failure Replacement e According to the type of models the outdoor DEMAND or EXCT will not be
25. Correct the connection at connector pins 4 and 5 Example Je O Notes N O 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H31 Alarm Aiomente we HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal indicating abnormal HIC temperature or other trouble from the HIC The HIC judges the current and temperature and outputs the trouble signal In general this indicates trouble with the HIC itself Probable cause Overcurrent in HIC circuit and the resultant abnormal heating caused by HIC failure Check the power wiring and connector wiring If the wiring and connectors are normal use a tester to measure the resistance between the compressor HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction HIC If an HIC failure is found replace the PCB Example Turn OFF the power and check the continuity of HIC and HIC on the HIC PCB L04 Alarm Outdoor system address duplication Alarm conditions Communication by inter unit control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause Incorrect outdoor system address settings Check the system address settings again Correct the system address settings Example Notes Recovery from this alarm occurs automatically when communication that contains the same address as that unit is not received for 3 minutes after
26. For the relationships between the sensor addresses and sensor types refer to the table of temperature sensors and addresses below If group control is in effect press the UNIT button to select the unit to monitor Press the temperature setting buttons to select the item code to change Press the A button to return to normal remote controller display 2WAY SYSTEM Remote Controller Functions PROGRAM COPY _ CZ RTC2 Display shows a discharge temperature of OOXX at unit No 1 1 In case for example the display shows 0085 in the figure above a discharge temperature from the outdoor unit stands for 85 C Outdoor unit sensors Fig 2 8 NOTE Unit No 1 Unit No 2 Unit No 3 2A 4A Discharge temp 1 2B 4B Discharge temp 2 2C 4C High pressure sensor temp 2D 4D Heat exchanger gas 1 2E 4E Heat exchanger liquid 1 2F 4F Heat exchanger gas 2 The temperature display appears as A for units that are not connected JE If monitor mode is engaged while normal OD operation is in progress only the parts of OE the LCD display shown in the figure will OF change Other parts continue to display 10 30 50 Heat exchanger liguid 2 the same information as during normal 7 31 51 Outdoor air temp operation P 12 32 52 13 33 53
27. However if this trouble occurs when other devices or compressors start then an oscilloscope is required 5 PCB failure Trouble Check Check that the current value measured with the clamp meter is not lower than the value measured with the PC or remote controller 6 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument 1 Replace the compressor 2 Replace the CT circuit 3 Repair the power circuit 4 Adjust the primary side power Repair the power wiring 5 Replace the outdoor unit PCB 6 Correct the trouble In the case of a compressor failure it is likely that steps must be taken to correct the cause of the compressor failure such as liquid back up in order to prevent recurrence Be sure to check that there is no cause which may resuit in compressor locking 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H03 H13 H23 Alarm ER el Alarm meaning Compressor 1 CT sensor disconnected or short circuit Compressor 2 CT sensor disconnected or short circuit Compressor 3 CT sensor disconnected or short circuit Alarm conditions Compressor 1 Current value of more than 18 0 A is detected while the compressor 1 is stopped Compressor 2 amp 3 Current value at compressor 2 and 3 is less than 2 0 A when 2 seconds or more had passed after the compressors began operation and output No current is detected even
28. SYSTEM PCB Settings 1 Outdoor Unit Control PCB Table 1 Setting the System Address S002 Rotary switch black S003 2P DIP blue Outdoor S002 S003 setting Outdoor S002 S003 setting system setting 1P 2P systemi setting 1P 2P address 10s digit 20s digit address 10s digit 20s digit 1 refrigerant 20 0 OFF ON system only i 2 OFF DEE 21 1 OFF ON 1 1 OFF OFF 22 2 OFF ON 2 2 OFF OFF 23 3 OFF ON 3 3 OFF OFF 24 4 OFF ON 5 5 OFF OFF 26 6 OFF ON 6 6 OFF OFF 27 7 OFF ON 7 7 OFF OFF 28 8 OFF ON 8 8 OFF OFF 29 9 OFF ON 9 9 OFF OFF 30 0 ON ON Link wiring 10 0 ON OFF 11 1 ON OFF 12 2 ON OFF 13 3 ON OFF 14 4 ON OFF 15 5 ON OFF 16 6 ON OFF 17 7 ON OFF 18 8 ON OFF 19 9 ON OFF Table 2 Table 3 Setting the Number of Indoor Units Setting the Number of Outdoor Units S004 Rotary switch red S005 3P DIP blue S006 DIP switch blue Number of 2 S005 Setting Number of S006 Setting Indoor Units 3004 Setting 1 2 3 Indoor Units 1 2 3 1 1 OFF OFF OFF 1 ON OFF OFF 2 2 OFF OFF OFF 2 OFF ON OFF 3 3 OFF OFF OFF 3 ON ON OFF 7 2 4 OFF OFF ON 9 9 OFF OFF OFF i oon Torr Torr Table en Setting the Outdoor Unit address 19 9 ON OFF OFF Outdoor Unit S007 Setting 20 0 OFF ON OFF Address 1 2 3 21
29. Servicing mains before op gerant carefully as it may cause ening the unit to check or repair G electrical parts and wiring e Keep your fingers parts e Clean up the site and clothing away from any moving after you finish remembering to check that no metal scraps or bits of wiring have been left inside the unit Amm IN caution being serviced Do not clean inside the indoor and outdoor units by users Engage authorized dealer or specialist for cleaning In case of malfunction of this appliance do not repair by yourself Contact the sales dealer or service dealer for repair Do not touch the air inlet or the Q sharp aluminum fins of the es outdoor unit You may get hurt Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas Confirm after installation that no refrigerant gas is leaking If the gas comes in contact with a burning stove gas water heater electric room heater or other heat source it can cause the generation of poisonous gas e Do not touch the air inlet or the N CAUTION sharp aluminum fins of the outdoor unit You may hurt e Do not sit or step on the unit you may fall down accidentally e Do not stick any object into the FAN CASE You may be injured and the unit may be damaged S A Check of Density Limit The room in which the air conditione
30. address Press and hold the and the timer operation buttons for 4 seconds or longer Press the button Entire system stops 2 13 2WAY SYSTEM Remote Controller Functions 4 Remote Controller Servicing Functions Test Run Function Operates the unit with the thermostat forced ON lt Procedure gt Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 2 7 Start operation Press the button to return to normal remote controller display 2 14 5 REMOTE CONTROLLER O 0 NE EED wt _ Be 4 Remote Controller Servicing Functions B Sensor Temperature Display Function displayed regardless of whether unit is operating or stopped The procedure below displays the sensor tempera tures from the remote controller indoor unit and out door unit on the remote controller lt Procedure gt Press and hold the and buttons simultaneously for 4 seconds or longer The unit No X X main unit No item code XX sensor address and servicing monitor XX sensor temperature are displayed on the remote controller LCD display See Fig 2 8 at right Press the temperature setting CA J Cy _ buttons and select the item code to the address of the sensor to monitor
31. alarm may occasionally occur when connecting the common use solenoid valve kit 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis L17 Alarm Alarm conditions Probable cause 1 A unit that uses R407C refrigerant or a R22 model unit was connected by mistake 2 The connected unit is correct however the refrigerant type setting in the outdoor unit EEPROM item code 80 is incorrect Check 1 Check the refrigerant type at the connected unit 2 Use the outdoor unit maintenance remote controller and check the item code 80 refrigerant type If the setting is incorrect change it to R410A Correction J Bampe fe Notes The outdoor unit s maintenance remote controller is required in order to set the refrigerant type in the outdoor unit EEPROM 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis P03 P17 P18 Alarm Compressor 3 discharge temperature trouble Alarm conditions Inverter compressor 1 Temperature is 105 C or higher and pre trip stop has occurred Compressors 2 3 constant speed Pre trip stop occurs at 105 C or above The alarm occurs when pre trip stop occurs more than once However the pre trip counter is cleared if the compressor operates continuously for a specified length of time Probable cause 1 Clogging of liquid valve capillaries 2 Insufficient amount of refrigerant including trouble resulting from an insufficient initial charge and from gas leakage 3 Blocking of low pressure parts cause
32. display the sensor temperatures from the remote controller indoor unit and outdoor unit sensors on the remote controller display lt Check procedure gt Press and hold the CHECK button and button simultaneously for 4 seconds or longer The following appears on the remote controller LCD display unit No X X main unit No item code XX sensor address and service monitor 00XX sensor temperature See figure at right Press the temperature setting EED and Cv buttons to change the item code to the sensor address of the sensor you wish to monitor For the relationship between the sensor address and sensor type refer to the sensor temperature relationship table on next page If group control is in effect press the CUNIT button to change to the unit you wish to monitor Press the CHECK button to return to normal remote controller operation lt Note gt The temperature display for units that are not connected appears as If monitor mode is engaged during ordinary operation the only parts of the LCD display that change are those shown in in the figure The other parts remain unchanged during normal operation 3 WAY SYSTEM Trouble Diagnosis No ke Hi Ga ro SET DATA N J CODE No CZ RTC2 Example id Unit No HAL Item code sensor address AA XX Discharge temp TD in 3 WAY SYSTEM 3 Remote Controller
33. indoor unit is excessively high During heating check for indoor fan failure Check whether the refrigerant circuit is clogged Check that all service valves are closed Check whether welded locations are clogged sound when the power is reset Since the mechanical valve in the indoor unit is in a location that makes aural inspection difficult use an electric means to check Check that the connector pin of the mechanical valve on the PCB outputs 4 V In addition check that the coil resistance of the mechanical valve is several tens of Q 11 Check for solenoid valve kit failure Removing a coil that is on will result in a clicking sound Also removing a coil that is off will not produce such a sound 12 Check whether too much refrigerant has been charged Too much refrigerant has been charged if the sub cool temperature of the condenser is 15 C or more Replace damaged components and correct the amount of charged refrigerant Bame Notes P05 Alarm Alarm code Alarm meaning Alarm conditions Probable cause Check Correction Example De SE EE A Notes 3 22 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes P14 Alarm Alarm meaning O2 sensor operation Alarm conditions 1 It is judged an error whenever the outdoor unit receives the signal O2 Alarm Generated from the indoor unit 2 With the indoor unit s EEPROM setting item code OB set to 0001 the EXCT input was shorted Probableca
34. indoor units resulting in a sudden rise in pressure at start that occurs before the refrigerant in the heat exchanger is discharged The representative valves to check are the liquid valves and mechanical valves 3 Outdoor unit PCB failure e The check items are the same as for a high pressure sensor malfunction A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction If an abnormality was found at the check items for a high pressure sensor malfunction first try replacing the PCB and check again Trouble is corrected Outdoor unit PCB failure Trouble is not corrected High pressure sensor malfunction Continued 3 13 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes Correction 1 Replace the high pressure sensor Caution Because the high pressure sensor connection employs a Schrader type valve it can be removed and replaced However the high pressure sensor can be easily damaged by high voltage therefore use sufficient caution with regard to static electricity 2 Replace the PCB 3 Correct the locations of problems in the refrigeration cycle e Correct locations where clogging or leakage has occurred e In the case of over charging recover refrigerant Adjust the amount of refrigerant Guide for over charging Be sure to connect the gauge to the high pressure pressure outlet when checking for over charging During cooling The following does not apply when
35. is in the cooling or dry mode the flap position is moved to 3 and the operation is started refer to Fig 2 3 The flap swings during the operation under Setting the Flap Separately At this time the unselected flaps are moved to the position 1 refer to Fig 2 3 Press the button The display stops blinking and remains lit and setting is completed If you wish to change the selected indoor unit follow the step Press the button to return to normal remote controller display YYYY SET DATA X X CODE No 2WAY SYSTEM Remote Controller Functions 3 Detailed Settings Function List of Detailed Setting Items Setting data Item code Item No Description No Description No Description 0001 4 Way Casstte 60x60 U1 Y1 0002 2 WAY Cassette L1 0003 1 Way Cassette D1 Low Silhouette Ducted F1 High Static Pressure a T ons Slim Low Static Ducted M1 0996 Ducted E1 0o97 Collings we ype as C led FI oncealed Floor 0008 Wall mounted K1 0010 Floor Standing P1 0011 Standing R1 0001 22 Type 22 0003 28 Type 28 0005 36 Type 36 71 Type 73 0007 45 Type 45 00 56 Type 56 0011 to Indoor unit ily is DP For S 71MP1E5 and S 71MR1E5 is capacity 80 Type 73 0012 Except S 71MP1E5 S
36. kW 1 690 kW This equipment complies with EN IEC 61000 3 11 provided that the system impedance Zmax is less than or equals to the values corresponding to each model as shown in the table below at the interface point between the user s supply and the public system Consult to the supply authority for the system impedance Zmax U 10ME1E8 E U 12ME1E8 E U 14ME1E8 E U 16ME1E8 E U 18ME1E8 E U 20MEVES E Zmax 0 194 Q 0 194 Q 0 194 Q 0 194 Q 0 1940 0 1940 Pay close attention to all warning and caution notices given in this manual This symbol refers to a hazard or unsafe AN practice which can result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can result in AN personal injury or product or property damage If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM
37. main and sub outdoor units was cut 2 After initial communications were completed the outdoor unit power was turned OFF 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis E25 Alarm ES tle ee ee Outdoor unit address setting failure duplication Alarm conditions Communication by outdoor unit main sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause The unit number is set incorrectly Check the unit number again Correct the incorrect unit number setting En ee ee ee N iN Notes Recovery from this alarm occurs automatically when communication that contains the same address is not received for 3 minutes E26 Alarm Alarm code E26 Alarm meaning Mismatch in outdoor unit quantity Alarm conditions After power initialization the set outdoor unit quantity did not match the number of outdoor units detected on the outdoor unit main sub control wiring for 3 minutes or longer Probable cause 1 The outdoor unit quantity is set incorrectly EE 2 The outdoor unit main sub control wiring is cut Check 1 Check the outdoor unit quantity setting again Oe EE NN Correction 1 Correct the incorrect outdoor unit guantity setting Es 2 Repair the outdoor unit main sub control wiring Notes Recovery from this alarm occurs automatically when the set outdoor unit guantity matches the number of outdoor units detected on the outdoor unit main sub c
38. main sub control wiring is cut 2 Check the outdoor unit main sub control wiring 1 Correct the incorrect outdoor unit quantity setting 2 Repair the outdoor unit main sub control wiring Exampe J SOS number of outdoor units detected on the outdoor unit main sub control wiring E29 Alarm Outdoor unit failed to receive communication from outdoor unit main Alarm conditions Outdoor unit communications from outdoor unit main were interrupted for 3 minutes or longer Probable cause 1 After initial communications were completed the outdoor unit main sub control wiring was cut Example o fef Notes TE E31 Alarm Alarm code Communication error between two microcomputers on the Control P C Board Alarm conditons Probable cause When does it occur 1 When failed in rewriting microcomputer 2 When the unit power shut down during rewriting microcomputer 3 When wiring between PCB and ROM writer disconnected Check 1 Rewrite microcomputer again 2 Switch on the unit power again Replace Control PCB Example O Notes S 3 9 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes F04 F05 F22 Alarm sensor trouble Compressor 3 discharge temperature sensor trouble Alarm conditions 1 Discharge temp of 100 C or higher was detected 20 minutes or more after that compressor stopped operating 2 Discharge temp of 70 C or higher was detected after all compressors had be
39. meaning Automatic backup is in progress A C units can be operated Status The compressor at one of the outdoor units where the outdoor unit fan is running should be operating Blinking inspection display also occurs when seizing of the compressor magnet SW is detected Because this may also be the case refer to Blinking inspection display compressor magnet SW seizing detection Alarm conditions When alarm P16 P22 P29 Hx1 Hx2 or H31 has occurred correcting the control device remote controller etc input engages this mode Probable cause Because alarm P16 P22 P29 Hx1 Hx2 or H31 has occurred check the alarm history then refer to the corresponding items Correction Follow the instructions in the corresponding items to correct the trouble Recovery After repairing the malfunctioning locations reset the power for the system all outdoor units Caution Automatic backup mode will not be canceled until the power is reset Notes Automatic backup mode is not engaged in cases of alarms other than those listed above Reasons There is no need for automatic backup if recovery is possible by correcting the remote controller input e With alarms for which automatic recovery is possible such as sensor alarms the presence of electrical noise may result in a new alarm However it is believed that this occurs for a comparatively short time only In these cases a mode automatic backup mode that limits operation may be engaged
40. monitor mode During temperature monitoring CHECk illuminates The display and operations are the same as for monitor mode using the indoor unit remote controller Press the UNIT UNIT button and select the indoor unit to monitor Press the temperature setting Ca and _y __ buttons and select the item code of the temperature to monitor The unit No of the selected indoor unit and the temperature data are displayed To end monitoring press the CE CHECK button The display returns to the normal display AUD The display does not blink B Display of unit No 1 main unit DN Description Remarks g Intake temp C oF E C Hes E2 C HS ES C gt Indoor unit IE Discharge temp C NI Discharge temp setting C DE Indoor unit electronic control valve position STEP lt HA Discharge temp 1 at Compressor 1 C fh Discharge temp 2 at Compressor 2 C fi High pressure sensor temp C Id Heat exchanger gas 1 C HE Heat exchanger liquid 1 C HIF Heat exchanger gas 2 C il Heat exchanger liquid 2 C 4 Outdoor air temp C iz Not used 3 Inverter primary current A 4 Current at Compressor 2 CT2 A gt Outdoor unit 5 MOV1 pulse STEP 5 MOV2 pulse STEP Mm Discharge temp 3 at Compressor 3 C i CT3 A i MOV3 pulse STEP I
41. o F31 Alarm Alarm code F31 Alarm meaning Outdoor unit non volatile memory EEPROM trouble Alarm conditions 1 Non volatile memory is not present when power initialization occurs 2 Read values do not match after writing to non volatile memory is complete Probable cause 1 Memory was not inserted after the PCB was replaced 2 The lifetime of the non volatile memory has been reached 3 Non volatile memory is installed incorrectly wrong direction bent pins etc Check Correction fe Example Notes 3 14 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes H11 H12 H21 H22 Alarm Alarm meaning H11 Constant speed compressor 2 overcurrent alarm H12 Constant speed compressor 2 lock current alarm H21 Constant speed compressor 3 overcurrent alarm H22 Constant speed compressor 3 lock current alarm Alarm conditions Hx1 During operation the compressor current value exceeded 12 A for 30 seconds or longer However this alarm is not detected for 4 seconds after the compressor starts Hx2 During operation the compressor current value exceeded 14 A for 4 seconds or longer However this alarm is not detected for 2 seconds after the compressor starts Compressor failure locked or partially locked CT circuit failure including cut wiring Missing power phase Low power voltage PCB failure Compressor failure partially locked Trouble Current value during operation greatly exceeds the value shown above
42. outdoor air temperature is low or when fan speed is controlled When both compressor 1 and compressor 2 are operating and the fan mode is 14 maximum fan speed then the high pressure saturation temperature should be approximately 15 C above the outdoor air temperature If it is 5 C or more above this level then it is possible that over charging may have occurred During heating There is an indoor unit where refrigerant flow is poor E1 temperature and discharge temperature are low and the mechanical valve of that unit is opened to 300 pulses or more and the E1 temperature is close to room temperature However be aware that this kind of data results often when there is a height difference between indoor units Reducing the amount of refrigerant will improve the refrigerant flow however reducing it too much will increase the likelihood of alarms related to low oil level scroll side the low pressure SW and discharge temperature Use caution Example This alarm may result when the service valve is closed or when valve leakage particularly from the mechanical valve occurs F17 Alarm Low pressure sensor trouble 2 Sensor open circuit Probable cause 1 Sensor malfunction including connector SOES Breman emery Check 1 Measure the sensor resistance Check that the sensor is operating normally ii 2 Use a remote monitor or a PC monitor to check the temperature that is recognized by the microcomputer Example VET Notes le
43. pre trip The A C unit low pressure has dropped to a level that does not occur under ordinary conditions 1 The absolute amount of gas in the system is too low as a result of insufficient refrigerant charge or leak 2 The refrigerant has accumulated in the circuit and has not returned to the compressor Refrigerant has accumulated in a location of one way flow and cannot escape High pressure level is low resulting in poor flow of refrigerant in the circuit A lower high pressure level results in a smaller difference between low pressure and high pressure that may be insufficient to cause refrigerant flow 3 The refrigerant circuit has become closed and refrigerant has not returned to the compressor In some cases when moisture enters the refrigerant circuit it can freeze at the low pressure locations and the resulting ice can block the circuit If the alarm occurs when there is sufficient refrigerant in the system 1 and 3 liquid refrigerant has definitely accumulated somewhere in the system Liquid refrigerant generally accumulates in high pressure locations In this case the high pressure gradually increases however it may not increase if the location where the liquid accumulates is sufficiently large Depending on the refrigerant saturation temperature it may also accumulate in low pressure locations In this case the high pressure is unlikely to increase 4 The wiring from the solenoid valve kit is actually connected
44. supplied in some cases e When LINE Checker is used the temperature sensors can be observed display record simultaneously e According to some areas some of the models are unreleased 201111
45. though the compressors are operating Probable cause 1 CT circuit failure including cut wiring etc 2 Disconnected CT circuit connector 3 Missing phase where CT circuit is connected 4 This CT circuit is connected to the connector of the other CT circuit 5 PCB failure 6 Electrical noise 1 CT circuit failure PCB failure Trouble e Current value during compressor operation is below the threshold value Check e Check that the connector is not disconnected e Check the continuity of the CT circuit e Install a normal CT in place of this CT and check If current is detected then the PCB can be judged OK gt CT circuit failure e Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 2 Crossed wiring or installation error Trouble When the compressor is stopped the current value at the other compressor is high vv When this type of condition occurs seizing detection control takes priority 3 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument Correction 1 Replace the CT circuit 2 Replace the outdoor unit PCB 3 Correct the problem 1 The connector was not inserted after the PCB was replaced Use a normal CT as a tool to determine whether the trouble is a PCB failure or CT failure HO5 H15 H25 Alarm Alarm code H05 H15 H25 Alarm meani
46. to the compressor 3 side e CT3 connector is connected to the compressor 2 side e CTS circuit is connected to the compressor 2 side 4 Electrical noise 1 Replace the CT circuit 2 Replace the magnet SW 3 Replace the PCB Correction If the above probable causes are not the cause of the alarm it is possible that in rare cases the alarm may be caused by the effects of noise See notes The effects of electrical noise are difficult to identify unless a PC is connected and the conditions are monitored for a long period of time 3 27 MEMO 3 28 2WAY SYSTEM PCB Settings Contents 4 PCB Settings 1 Outdoor Unit Control PCB anssen enen eenen enen ee 4 2 4 1 2WAY SYSTEM PCB Settings 1 Outdoor Unit Control PCB 1 1 Outdoor Unit Control PCB CR C1806DXH8 S003 S002 RUN pin AP pin CHK pin CN052 CN050 CN049 S005 A ADD pin STOP pin OAC pin Control circuit TEST pin CN054 CN053 CN051 fuse F501 CN048 Power LED z D515 F HIC2 g ij HIC5 HIC4 HIC3 Snow senser CN057 HIC1 NS ve E E RE 4 S004 S007 HIC6 MODE pin CN085 CTN CTL1 E Mj 006 x zij 2 ds S010 i SEJ oe ar Ba j Cu en ore oa le ou Alarm LED D023 LED1 DO24 LED 2 Terminal plug CN072 RC1 plug EEPROM CN076 memory IC 1C014 RC plug CT2 CT3 CN077 OC plug CNO01 High pressure sensor 7 7 HPS en Low pressure Comp Comp Liquid temp Suct
47. to the different indoor unit 5 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Installation of the common use solenoid valve kit from a PC has not been made 1 Check that the service valve is open 2 Check that none of the valves solenoid valves mechanical valves in the main refrigerant circuit is closed due to an operation failure 3 Check that there is no possibility of foreign objects or water having entered the refrigerant circuit 4 Check that valve leakage at a stopped sub unit has not resulted in accumulation of refrigerant at that sub unit 5 Check that no refrigerant leakage has occurred 6 Check whether the wiring from the solenoid valve kit is actually connected to the different indoor unit or not 7 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Check whether installation of the common use solenoid valve kit from a PC has been made or not Confirmation from the address setting software of a PC 1 If there was a valve operation failure in general it is necessary to replace the valve 2 If a foreign object or moisture has entered the circuit install a strainer or dry core depending on the degree of the problem 3 If refrigerant has leaked into stopped sub units it is likely that valve leakage has occurred
48. 01111 as DA DR HAM 3 WAY SYSTEM Trouble Diagnosis 5 TROUBLE DIAGNOSIS Contents of Remote Controller Switch Alarm Display ss ska ss ss ER ee 5 2 Outdoor Unit Control Panel LED Display ss ss ts saak kk Ra RR eee eee 5 4 Remote Controller Servicing Functions ss eek Rae RR RR RR ER RR RR RR RR RR ee 5 5 3 WAY Alarm Codes ora isis oase ske s tee oes dade weave ta eae eek sahi 5 7 Blinking Inspection Display EE RR RR RR RR RARR RR RR RR RR RR RR RR RR RR ee 5 27 Inspection of Parts swak EER KEER Oe eee eee EE EE EER RE E KEER ER eee ees 5 29 TESEPIA EE ED OR hie OE OER OE EE KOR N 5 30 Symptom Thermostat in OFF continues or cycles OFF amp ON too frequently 5 31 1 Contents of Remote Controller 3 WAY SYSTEM Switch Alarm Display Trouble Diagnosis ON O Blinking X OFF Serial communication errors Mis setting Wired remote control display Possible cause of malfunction Di Remote controller is detecting Error in receiving serial communication signal Signal from error signal from indoor unit _ main indoor unit in case of group control Outdoor system i i address indoor unit address or indoor unit address lt E01 gt Operating lamp Wireless remote controller receiver display Operation for heating independent main sub unit setting has not been made pias Auto address is not completed xt e e Error in transmitting serial communication signal Indoor u
49. 04 No of indoor units Indoor unit setting S005 3P DIP switch blue 10 20 30 Indoor unit setting S004 Rotary switch red ON ON 7 1 unit factory setting All OFF WER 2 KX 1 3 OFF ON ON 7 11 units 10N Apg KY set to 1 12 OFF ON ON 7 21 units 20N WAG SS Set to 1 1 2 OFF ON ON 5 31 units 30N WEE SS Set to 1 1 3 OFF 40 unit 1 amp 30N MOM Y set to 0 units p de ole KJ et to j ON ON 58 units 2 amp 30N WEN 92 set to 8 1 2 3 OFF ON ON 64 units AION Mmm Al Set to 4 12 OFF System address S003 S H ystem address S002 System address No 2P DIP switen blue Rotary switch black ON ON 5 System 1 factory setting Both OFF n i 8 KX Set to 1 1 2 OFF ON ON 3 System 11 1ON BQ 2 SS Set to 1 12 OFF ON ON 3 System 21 20NIGB SS Set to 1 1 2 OFF ON ON 0 System 30 1 amp 2O0N ER ae Set to 0 1 2 OFF No of outdoor units Outdoor unit setting S006 3P DIP switch blue Examples of the No of outdoor units settings S006 Address setting of main ON ON 1 unit factory setting 1ON EE A 1 2 2 OFF ON ON 2 units 2ONIE Au 2 123 OFF O
50. 06 F23 Alarm Mameode For Alarm meaning Gas temperature sensor trouble at outdoor heat exchanger 1 Gas temperature sensor trouble at Aam means EG Geers senor vou Alarm conditions 1 A D step is 10 steps or less short circuit GN FEE EG NN 1 Sensor malfunction including connector 2 PCB malfunction 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer F07 F24 Alarm trouble at outdoor heat exchanger 2 2 A D step is 1014 steps or more open circuit 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes F08 Alarm Komende fre Alarm meaning Outdoor air temperature sensor trouble Alarm conditions 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit Probable cause 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction s O Example J gt o O Notes F12 Alarm
51. 3 5 6 7 Relay RY006 Balance valve BALV 8 Relay RY022 Pressure balance valve 1 PBV1 18 Relay RY004 Crank case 3 CH3 9 Relay RY017 Refrigerant balance valve RBV ooo 10 Relay RY016 Refrigerant adjustment valve RCV o y 8 Symptom Thermostat in OFF continues or cycles OFF amp ON too frequently 1 How to detect abnormality e Abnormality does not occur Protective function can be checked when the outdoor maintenance remote controller is connected 2 Error Diagnosis 1 Indoor control PC board Setting temperature reaches the level set ON thermostat Setting temperature is too low in heating mode and too high in cooling and dry mode 3 WAY SYSTEM Trouble Diagnosis Adjust setting temperature 1 2 Check if the sensors are connected correctly Are all connection made properly Room temp TA in yellow heat exchanger E1 in red heat exchanger E2 in black heat exchanger E3 in brown air outlet BL in green Connect correctly 1 3 DISP display mode is applied Turn OFF OPEN 1 4 With a thermostat OFF in heating mode wind speed item code 05 is out of range 0 6 Use Simple Setting Function on standard timer remote controller Choose one of 0 to 6 1 5 EXCT demand control is applied Turn OFF OPEN 2 1 2 Outdoor control PC board Outdoor unit and protective function of a system are operating
52. 5 8 8 z 8 poes poss Doss D097 0077 0076 0086 0084 D085 come igo tg a aa ees 2 PCB Assy KA CR C1806DxHel 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes E16 Alarm Alarm meaning Automatic address setting alarm too many units Alarm conditions e The number of indoor units was too many when automatic address setting was performed Ed e After initial communications were completed an unrecognized unit was detected Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW S004 S005 on the outdoor unit PCB is less than the number set 2 The inter unit control wiring is wired incorrectly 1 Refer to the test run servicing materials and check the number of indoor units that is set 2 Check the inter unit control wiring at the indoor and outdoor units After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic address setting again Example o ef Notes E20 Alarm mee EA No indoor units at automatic address setting Probable cause 1 The inter unit control wiring from the outdoor unit to the indoor units has been cut 2 Serial connector 1 CNOO1 is disconnected at the outdoor unit 3 The power is OFF at all indoor units in the system Check 1 Check whether the inter unit control wiring from the outdoor unit to the indoor units is cut oe 2 Check whether serial connector 1 CNOO1 is disconnected at th
53. 5 PCB failure 1 Compressor failure partially locked Trouble Current value during operation greatly exceeds the value shown above Check When the current for each phase is measured with a clamp meter or similar instrument check that the current value for all phases is not high If MG was forced ON use caution check that compressor noise will not occur or the compressor will not run with a groaning sound 2 CT circuit failure PCB failure Trouble Check e Check for poor connector contact e Check the continuity of the CT circuit e Install a normal CT in place of this CT and check If current is detected then the PCB can be judged OK gt CT circuit failure e Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 3 Missing power phase Trouble This alarm primarily occurs when the T phase is missing When the R phase or S phase is missing CT trouble or PCB continuity trouble occur However this may not be true in the case of a missing phase caused by magnet SW trouble Check There is the possiblility of a magnet SW failure Therefore check the phase voltage at a location that is as close to the compressor as possible 4 Low power voltage Trouble In most cases this occurs when another constant speed compressor including compressors in other units or other device starts It also occurs when the power wiring is extremely long Check Check the voltage between each of the phases
54. 5 Valve leakage 6 Over charging 7 Outdoor unit PCB failure 8 Electrical noise 1 High pressure sensor failure e Check the sensor resistance value Use a tester and measure the resistance between sensor No 1 and No 3 Resistance of less than 10kQ indicates a short circuit or other trouble Resistance of 10kQ 200kQ is normal Resistance of more than 200kQ indicates an open circuit or other trouble e Connect a gauge to the high pressure outlet and check for changes in the value dispalyed by the monitoring software and for large deviation of the gauge pressure e During heating check whether the temperature is lower than the highest indoor unit E1 temperature The pressure detected by the high pressure sensor is the highest pressure in the system Therefore during heating the converted saturation temperature will never be lower than any indoor unit E1 temperature During cooling this temperature will never be lower than the outdoor unit liquid temperature 2 Failure to open the service valve clogged tubing valve leakage over charging In all of these cases an alarm occurs when there are rapid pressure fluctuations and tracking of the detected pressure is poor e Check the open closed status of the valve e Check for clogging of the tubing To check for clogging disconnect the high pressure sensor from the PCB and check whether the high pressure SW activates e Check for valve leakage and over charging When valve leakag
55. Check When the current for each phase is measured with a clamp meter or similar instrument check that the current value for all phases is not high If MG was forced ON use caution check that compressor noise will not occur or the compressor will not run with a groaning sound 2 CT circuit failure PCB failure Trouble Check e Check for poor connector contact e Check the continuity of the CT circuit e Install a normal CT in place of this CT and check If current is detected then the PCB can be jedged OK gt CT circuit failure e Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 3 Missing power phase Trouble This alarm primarily occurs when the T phase is missing When the R phase or S phase is missing CT trouble or PCB continuity trouble occur However this may not be true in the case of a missing phase caused by magnet SW trouble Check There is the possiblility of a magnet SW failure Therefore check the phase voltage at a location that is as close to the compressor as possible 4 Low power voltage Trouble In most cases this occurs when another constant speed compressor including compressors in other units or other device starts It also occurs when the power wiring is extremely long Check Check the voltage between each of the phases However if this troube occors when other devices or compressors start then an oscilloscope is required 5 PCB failure Trouble Chec
56. LED 2 blinks 17 times The cycle then repeats Alarm is P17 3 4 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes With type 8HP the INV compressor is compressor 1 only With types 10HP 12HP 14HP and 16HP the INV compressor is compressor 1 and the constant speed compressors AC1 are compressors 2 With types 18HP and 20HP the INV compressor is compressor 1 and the constant speed compressors AC1 AC2 are compressors 2 and 3 E06 3 7 3 7 E16 Automatic address setting alarm too many units 38 E20 No indoor units at automatic address setting 38 E24 Outdoor unit INV failed to receive communications from another outdoor unit constant speed E25 Outdoor unit address setting failure duplication 39 E26 Mismatch in outdoor unit quantity NS E29 Outdoor unit failed to receive communication from outdoor unit main 39 E31 Communication error between the microcomputers 39 F04 F05 F22 FOG F07 F08 F17 Low pressure sensor trouble 3 14 F23 Gas temperature sensor trouble at outdoor heat exchanger 2 In F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 Out 3 11 F31 Outdoor unit non volatile memory EEPROM trouble 3 14 Constant speed compressor 2 overcurrent alarm 3 15 3 16 Compressor 1 oil detection sensor connection trouble 3 18 3 16 3 15 H22 H23 Compressor 3 CT sensor disconnected or short circuit 3 16 H25 Compressor 3 discharge tempera
57. Mameode e ompressor intake temperature sensor trouble 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit 1 Sensor malfunction including connector 2 PCB malfunction 1 2 Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction J o Oe Example J gt o O Notes o O 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes F16 Alarm Alarm meaning High pressure sensor trouble abnormal rise in high pressure In some cases this may not be the result of a high pressure sensor malfunction Alarm conditions e High pressure SW activated although the detected pressure was lower 3 03 MPa or below than the high pressure SW activation pressure Undershift e High pressure SW failed to activate although the detected pressure was higher 3 43 MPa or above than the high pressure SW activation pressure Overshift e The saturation temperature at the detected pressure is 5 C or more below the highest indoor unit E1 temperature continuously for 30 minutes e High pressure sensor disconnected or open circuit Probable cause High pressure sensor malfunction Failure to connect the connector to the outdoor unit PCB Failure to open the service valve Clogged tubing Valve leakage Over charging Outdoor unit PCB failure Electrical n
58. N ON 3 units 1 amp 2ON EEE f 1 2 3 OFF ON _ ON 4 units 3ON IE WA 8 1 2 5 OFF outdoor unit S007 Unit No setting Address setting of outdoor unit S007 3P DIP switch blue Unit No 1 main unit factory setting EE ON 9 OFF Address setting of sub outdoor unit Unit No setting Address setting of outdoor unit S007 3P DIP switch blue ON ON Unit No 2 sub unit 2 ON EE 9 1 2 3 OFF ON ON Unit No 3 sub unit 1 amp 20N A BG 9 1 2 3 OFF ON ON Unit No 4 sub unit 3 ONE EE 123 OFF 2WAY SYSTEM Address Settings Examples of refrigerant circuit R C address settings required when link wiring is used S003 S002 The sub unit control PCB contains the same switches as the main unit control PCB for No of indoor units No of outdoor units and system address However it is not necessary to set these switches 1 3 2WAY SYSTEM Address Settings 2 Settings of Indoor Unit Control PCB 0 LED1 D023 S006 7 DS oo d one Sn Si D e 2 CN056 A 8 Q CN057 LIP CN049 Sy DDO p S PA CN050 id CNO72 a CNO52 je pad CN053 Ny A LED2 D024 CN054 S010 005 S004 S002 S003 Name And Function Of Each Switch On Outdoor Unit Control PC Board e Mode Select switch 3P Black CN085 During normal drive When the cooling side is short cir
59. NO SM830187 02 IMPORTANT Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person it is an important part of your job to install or service the system so it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes This product is intended for professional use Permission from the power supplier is required when installing the U 8ME1E8 E outdoor unit that is connected to a 16 A distribution network This equipment complies with EN IEC 61000 3 12 provided that the short circuit power Ssc is greater than or equals to the values corresponding to each model as shown in the table below at the interface point between the user s supply and the public system It is the responsibility of the installer or user of the equipment to ensure by consultation with the distribution network operator if necessary that the equipment is connected only to supply with a short circuit power Ssc greater than or equals to the values corresponding to each model as shown in the table below U 10ME E E U 12ME1E8 E U 14ME1E8 E U 16ME1E8 E U 18ME1E8 E U 20ME1E8 E Ssc 1 660 kW 1 660 kW 1 510 kW 1 510 kW 1 690
60. Nos of connected indoor unit 7 segment display iy Operating status of indoor unit 7 segment display HD Thermostat ON status of indoor unit 7 segment display AG No of connected outdoor units 1 8 ie Unit Nos of connected outdoor units 7 segment display fi Operating status of outdoor unit compressor 7 segment display HA ii ID Compressor 1 operating time 0 99999999 hrs Va Compressor 2 operating time 0 99999999 hrs ie Compressor 3 operating time 13 Compressor 1 oil level 0 Empty 1 Insufficient 2 Sufficient 14 Compressor 2 oil level O Empty 1 Insufficient 2 Sufficient 15 Compressor 3 oil level 0 Empty 1 Insufficient 2 Sufficient IR Outdoor unit power ON time 0 99999999 hrs o Compressor 1 operation count 0 65535 times if Compressor 2 operation count 0 65535 times iF Compressor 3 operation count 0 65535 times ER Alarm history 1 most recent Fi Alarm history 2 Display only Alarm code and unit No of unit Fe Alarm history 3 where alarm occurred are displayed alternately Fi Alarm history 4 0 CCU Fu Alarm history 5 1 4 Outdoor unit FS Alarm history 6 EE Alarm history 7 Fi Alarm history 8 oldest FE Firmware version Displays the version No x 100 EE Program version Displays the version No x 100 and correspond to Fig 6 3 on the next page 6 4 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller XX YY R C Displays the outdoor unit sub bus
61. Panasonic TEST RUN SERVICE MANUAL 2WAY SYSTEM Model No Outdoor Unit Class 8HP 10HP 12HP 14HP 16HP 18HP 20HP U 8ME1E8 U 10ME1E8 U 12ME1E8 U 14ME1E8 U 16ME1E8 U 18ME1E8 U 20ME1E8 Model Name U 8ME1E8E U 10ME1E8E U 12ME1E8E U 14ME1E8E U 16ME1E8E U 18ME1E8E U 20ME1E8E Indoor Unit Class 22 28 36 45 56 73 106 140 160 4 Way Cassette S 22MU1E5 S 28MU1E5 S 36MU1E5 S 45MU1E5 S 56MU1E5 S 73MU1E5 S 106MU1E5 S 140MU1E5 S 160MU1E5 4 Way Cassette 60x60 S 22MY1E5 S 28MY1E5 S 36MY1E5 S 45MY1E5 S 56MY1E5 2 Way Cassette S 22ML1E5 S 28ML1E5 S 36ML1E5 S 45ML1E5 S 56ML1E5 S 73ML1E5 1 Way Cassette S 28MD1E5 S 36MD1E5 S 45MD1E5 S 56MD1E5 S 73MD1E5 Low Silhouette Ducted S 22MF1E5 S 28MF1E5 S 36MF1E5 S 45MF1E5 S 56MF1E5 S 73MF1E5 S 90MF1E5 S 106MF1E5 S 140MF1E5 S 160MF1E5 Slim Low Static Ducted S 22MM1E5 S 28MM1E5 S 36MM1E5 S 45MM1E5 S 56MM1E5 Ceiling S 36MT1E5 S 45MT1E5 S 56MT1E5 S 73MT1E5 S 106MT1E5 S 140MT1E5 Wall Mounted S 22MK1E5 S 28MK1E5 S 36MK1E5 S 45MK1E5 S 56MK1E5 S 73MK1E5 S 106MK1E5 Concealed Floor Standing S 22MR1E5 S 28MR1E5 S 36MR1E5 S 45MR1E5 S 56MR1E5 S 71MR1E5 Floor Standing S 22MP1E5 S 28MP1E5 S 36MP1E5 S 45MP1E5 S 56MP1E5 S 71MP1E5 Class 73 106 140 224 280 High Static Pressure Ducted S 73ME1E5 S 106ME1E5 S 140ME1E5 S 224ME1E5 S 280ME1E5 85464849287002 REFERENCE
62. Servicing Functions Trouble Diagnosis Sensor Temperature Relationship Table Location where sensor Sensor address Sensor type Senso Sensor type is installed r address Remote controller temperature 05 Discharge temperature sensor Indoor unit intake temperature Indoor unit heat exchanger Indoor unit electronic expansion temperature E1 valve position Indoor unit heat exchanger temperature E3 Outdoor unit 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis With types 8HP 10HP and 12HP the INV compressor is compressor 1 and the constant speed compressor is compressor 2 With types 14HP and 16HP the INV compressor is compressor 1 and the constant speed compressors AC1 AC2 are compressors 2 and 3 E06 Outdoor unit failed to receive serial communication signals from indoor unit 59 Automatic address setting start is prohibited E15 Automatic address setting alarm too few units E20 5 11 5 11 5 11 E24 Outdoor unit INV failed to receive communications from another outdoor 5 10 unit constant speed E25 5 11 E26 5 11 E29 5 11 F04 5 12 F05 F22 FO F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 Out F08 F23 F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 Out F25 F26 5 13 F31 Outdoor unit non volatile memory EEPROM trouble 5 17 H03 5 18 HOS 5 18 HOG 5 19 HO7 No oil alarm 5 20 H08 Compressor 1 oil detection sensor connectio
63. Setting from the Outdoor Unit 1 To set the number of outdoor units on the outdoor main unit control PCB set the No of outdoor units DIP switch S006 to any 2 OFF On the No 3 sub unit control PCB set the unit No switch S007 to ON T 1 2 switch S003 is set to eN OFF No of indoor units DIP switch S005 to Turn ON the power to the indoor and N 3 units and set the unit No DIP switch S007 to On the No 2 sub unit control PCB set the unit No switch S007 to AT ON unit No 1 main outdoor unit unit No 2 unit No 3 On the outdoor main unit control PCB check that the system address rotary switch S002 is set to 1 and that the DIP 0 These are the settings at the time of factory shipment EE outdoor units Q OFF To set the number of indoor units that are connected to the outdoor unit to 10 on the outdoor main unit control PCB set the 1 and set the rotary switch S004 to 0 On the outdoor main unit control PCB short circuit the automatic address pin CN054 for 1 second or longer then release it v Communication for automatic address setting begins Vv To cancel again short circuit the automatic address pin CN054 for 1 second or longer then release it The LED that indicates that automatic address setting is in progre
64. ach pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or replace the coil e MOV2 Measure the voltage between plug pin 5 and pins 1 through 4 at the CNO16 connector 6P RED on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OO or co replace the coil e MOV3 Measure the voltage between plug pin 5 and pins 1 through 4 at the CN229 connector 6P BLK on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or replace the coil e MOV4 M
65. address which is currently selected XX Outdoor unit system address 1 30 YY Outdoor unit address 1 4 The locations where and are displayed as shown on Fig 6 3 CE GE ne lt No of connected indoor units gt 4 units connected Fig 6 4 soen C 8 D CS COPY ACE ERO Oxa f lt Unit Nos 1 2 3 4 connected gt Fig 6 5 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller B Concerning the 7 segment 4 digit display of remote controller timer time e The unit Nos of connected units are indicated by four 7 segment digits HB A and a colon D Display of unit Nos 1 20 OFF OFF OFF OFF Meaning of colon pel ped bell AN O O L 3 Al Li Ad Li Lt AH aw a ON ON Display of unit Nos 21 40 OFF OFF OFF OFF Meaning of colon 21 26 31 36 bell 28 l Be l 38 AR s ie Li Al Li Le Li Li Li Li O O 26 30 35 40 1 20 21 40 41 eo 61 80 ka meaning 6 i colon oe in the same way to indicate unit Nos up to 80 Sample displays of connected indoor unit Nos Display of unit No 1 D AA AA AA AA e Display of unit Nos 1 and 2 D N az AA AA e Display of unit Nos 1 2 and 3 D lt gt N Fi AA AA e Display of unit No
66. al Remote controller is detecting Error in receiving serial communication signal Signal from communication error signal from indoor unit main indoor unit in case of group control Outdoor system Loe address indoor unit address or indoor unit address Operating lamp independent main sub unit setting has not been made blinking Auto address is not completed xe e e Error in transmitting serial communication signal Indoor unit is detecting error signal from remote controller and system controller after automatic address setting Outdoor unit is detecting error e Error in receiving serial communication signal signal from indoor unit e There is an indoor unit which does not send signals when the power is ON Improper setting e Indoor unit address setting is duplicated e Duplicated remote controller main setting Operating lamp Improper setting Automatic address setting start is prohibited AP pin was short circuited at time when automatic address E12 setting was started Indoor unit communication Error of main indoor unit in receiving serial communication E18 error of group control wiring signal from sub indoor units During auto address setting number of connected units does not correspond to mr number set binking e Indoor unit is detecting error Error in receiving serial communication signal signal from outdoor unit e When turning on the power supply the number of connected indoor units does not c
67. alling the external timer for the silent mode 3 Auto Address Setting Auto Address Setting Basic wiring diagram Example 1 e If link wiring is not used The inter unit control wires are not connected to multiple refrigerant systems Indoor unit addresses can be set without operating the compressors No 1 main outdoor unit 2WAY SYSTEM Address Settings settings No of indoor units System address 10 units setting system 1 setting S004 S002 S003 7 ON ON TE oor a No 2 sub unit No 3 sub unt EF BOU settings settings No of 006 LE 5607 Unit S007 Unit S007 outdoor on Unit number N number ON on number ON oN units 3units 5 P d 9 setting B nj 0 setting g A a Ae setting A A p oe setting of Unit No ETE oe Unit No 2 Unit No 3 Leave the socket that is nit used to short circuit the nm Uii nI i nI ni Outdoor Unit No 1 caer No 2 No 3 Mai Sub 3 Sub ee Inter outdoor unit Suo Inter outdoor unit Sub control wiring control wiring Inter unit control wiring a a M Indoor Unit 1 1 1 2 1 3 1 10 Remote controller Case 1 Dg Remote controller communication wiring 1 Automatic Address
68. an HIC failure or circuit failure replace the PCB 2 If the fan motor is locked replace the fan motor Cn E Turn OFF the power and check the continuity of and on the fan circuit PCB 3 24 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes P29 Alarm Alarm code Alarm meaning Alarm conditions Probable cause P29 Inverter compressor missing phase or lock alarm This alarm may occur at start and occurs when missing phase or lock is detected and when a DCCT failure occurs Generally this alarm occurs when the refrigerant pressure balance is uneven at start or when inverter compressor lock occurs there is a missing phase in the inverter compressor wiring or a DCCT failure occurs This can be judged to be starting trouble which is not caused by HIC Check Correction Example Notes Check the power wiring and connector wiring DCCT failure replace PCB or compressor failure Use a tester to measure the voltage between the DCCT output terminal on the rear of the PCB and the ground If the voltage is not within 2 3 V then the DCCT has malfunctioned 3 25 2WAY SYSTEM Trouble Diagnosis 4 Blinking Inspection Display on The Remote Controller CAUTION Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller Blinking inspection display 1 Automatic backup Blinking inspection display Alarm
69. ating check whether the air filters in the indoor unit are clogged If clogged clean the filters During heating check whether an air short blockage has occurred in the indoor unit The system operates normally unless the temperature around the indoor unit is excessively high During heating check for indoor fan failure Check whether the refrigerant circuit is clogged Check that all service valves are closed Check whether welded locations are clogged 10 Check for mechanical valve failure Check whether the mechanical valves make a clattering sound when the power is reset Since the mechanical valve in the indoor unit is in a location that makes aural inspection difficult use an electric means to check Check that the connector pin of the mechanical valve on the PCB outputs 4 V In addition check that the coil resistance of the mechanical valve is several tens of Ohm Q 11 Check for solenoid valve kit failure Removing a coil that is on will result in a clicking sound Also removing a coil that is off will not produce such a sound 12 Check whether too much refrigerant has been charged Too much refrigerant has been charged if the sub cool temperature of the condenser is 15 C or more 13 Check whether the wiring from the solenoid valve kit is actually connected to the different indoor unit or not 14 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controlle
70. ature setting buttons to select item code 5d Press the timer time 4 buttons to select the desired setting data For item codes and setting data refer to Table 1 Table 3 Press the button The display stops blinking and remains lit and setting is completed If air blocking material is used use the same procedure as in steps 3 5 above and change the setting for item code 62 to 0000 To change the selected indoor unit go to step 2 Press the button to return to normal remote controller display 2WAY SYSTEM Remote Controller Functions EEG UNIT No 4 R C No SET DATA B Fig 2 4 Failure to make this setting may result in decreased airflow and condensation Table 1 Table of DC Fan Motor Tap Settings 4 way cassette type Setting No Remote controller setting data Contents amp optional parts name 0000 Standard setting at time of shipping 3 0003 Air blocking material for 3 way air discharge 0003 Air blocking material when a discharge duct is connected 6 0006 Air blocking material for 2 way air discharge Table 2 Table of DC Fan Motor Tap Settings Ceiling type Setting No Remote controller setting data Purpose of use names of accessories 0000 Standard setting at time of shipping High ceiling setting 1 0001 Super long life filter Ammonia deodorant filt
71. ble Diagnosis Blinking inspection display 2 compressor magnet SW seizing detection Alarm code Blinking inspection display Alarm meaning Compressor magnet SW seizing detected Status Although an outdoor unit exists where the outdoor unit fan is running no compressors in the system are operating yy Because the fan is running only at the outdoor unit where seizing was detected check the corresponding outdoor unit The fan may also run on its own when fan cracking prevention control is in effect or when snowfall sensor input is present Therefore monitor for approximately 10 minutes if the outdoor unit fans are operating at multiple units Alarm conditions Current is detected in the CT circuit when the compressor is stopped 1 This control is not engaged for the first 30 seconds after the compressor turns ON OFF 2 For 1 minute following the first 30 seconds after the compressor turned ON OFF the threshold for the detected current is 10 A or more continuing for 2 seconds 3 All times other than the above e If the low pressure SW has not activated the threshold for the detected current is 7A or more continuing for 5 seconds e If the low pressure switch has activated the threshold for the detected current is 7A or more continuing for 2 seconds Probable cause 1 Magnet SW malfunction e The magnet SW has seized and the compressor is continuing to run gt Even when the power is turned OFF the primary side and secondary si
72. cept Except Indoor unit Indoor unit Except oS Type E1 pe F _ Type Et TyPeEl z Type Remote Remote Remote f Remote Remote e Remote controller controller controller controller controller controller Remote control group wiring with a different refrigerant circuit in the indoor unit 1 When setting installation of common use solenoid valve kit is made by PC check whether the installation change was made in the same series of all indoor units or not Check the software of address setting of PC In this case L11 alarm occurs at all indoor units remote controllers 2 Check the condition of remote control group wiring where L11 alarm occurs Check whether the group wiring is made with the indoor unit of a different solenoid valve kit or not Check whether the group wiring is made with the indoor unit of a different refrigerant circuit or not 3 Check the model of indoor unit connected to a remote control group where L11 alarm occurs Check whether type E1 indoor units are connected in the group wiring or not Check the model of indoor unit with the item code 10 for the detailed setting of the remote control Correction 1 Perform installation of common use solenoid valve kit from PC in the same series of all indoor units 2 With a common use solenoid valve kit change into the wiring that is allowed Example Notes This
73. connectors are normal then check that the capacitor of the Hall IC input circuit is securely soldered onto the PCB Also use a tester and measure the resistance between fan HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction An ane an Fan circuit on the outdoor unit control PCB In the 3 WAY SYSTEM the fan circuit PCB is integrated with the outdoor unit PCB Correction If the fan does not start the below corrections may be effective 1 If there is a fan HIC failure or circuit failure replace the PCB 2 If the fan motor is locked replace the fan motor Turn OFF the power and check the continuity of and on the fan circuit PCB P26 Alarm Airmen Pae OO OOO O OOOO Alarm meaning Inverter compressor high frequency overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter frequency of 80 Hz or higher after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause The detection methods are the same as for P16 However the fact that operation up to high frequencies is possible does not necessarily mean that a compressor failure is the cause of the trouble Start the compressor several times If alarm P26 occurs every time and alarm P16 does not occur at all then the possibility
74. cuit all indoor units change to cooling mode Changes to the cooling or heating mode Main outdoor unit is only usable When the heating side is short circuit changes to all heating mode e Auto Address pin Short circuit for 1 second or longer When opened the auto address mode starts 2P White CNO54 When the short circuit remains in effect for more than 1 second during auto address the auto address is interrupted e CHK Pin TestRun When set to short circuit changes to the test run mode 2P White CNO49 The test run mode is automatically cancelled after an hour When short circuit is cancelled the test run mode is cancelled e RC socket Connects to the outdoor unit maintenance remote control and the content of an alarm SP Blue CNO77 message will be checked e Run pin When the pulse signal applied after short circuit all indoor units within the same series will 2P White CN052 be operated e Stop pin When the pulse signal applied after short circuit all indoor units within the same series will 2P White CNO53 be stopped When set to short circuit the remote control from the indoor unit can not be operated e AP pin Vacuum 2P White CN050 Used for vacuuming the outdoor unit Socket for Snow Area e Snow sensor 3P Red CN057 Used for installing the snow sensor Silent Socket e Socket for silent mode 2P White CNO56 Used for inst
75. d the discharge temperature of this compressor rises together with the temperature of the other compressor 4 The ambient temperature around the outdoor unit when it is stopped is 43 C or higher 5 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble It is necessary to provide a line filter or carry out other noise countermeasures Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Carry out noise countermeasures 4 Repair the refrigerant tubing 5 Adjust the amount of refrigerant 6 Correct the trouble 1 Sensor wiring is partially cut Notes This alarm does not indicate that the sensor is disconnected In order to prevent overheating during operation the outdoor units in this system will not allow a compressor to start if the discharge temperature does not decrease while the compressor is stopped If a sensor malfunction results in continuous detection of a high discharge temperature then the compressor may stop for no apparent reason The purpose of this alarm is to facilitate identification of the problem in this case F06 F23 F25 Alarm C Alarm meaning Gas temperature sensor trouble at outdoor heat exchanger 1 Gas temperature sensor trouble at Aam meanma deer heat oxchangor 2 Qas temperature sensor vou al outdoor heat saehanger 3 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more o
76. d by intrusion of foreign objects moisture scale etc 4 Crossing tubing or PCB connectors with the other compressor thermistor 5 Expansion valve operation failure 6 Accumulation of refrigerant at stopped outdoor units 7 Compressor discharge sensor failure 8 PCB failure A D conversion failure 9 Electrical noise 1 Clogging of capillaries Trouble Compressor discharge temperature does not decrease even when the liquid valve is ON Check When the liquid valve is operating and the liquid valve is ON check that the secondary side of the liquid capillaries is cold 2 Insufficient refrigerant Trouble Liquid effectiveness is poor Check Check whether or not the superheating temperature is declining if the evaporator mechanical valve is opened to 300 pulses or more after checking for foreign object intrusion 3 Foreign object intrusion Trouble Liquid valve effectiveness is poor Check Check that there is no difference in the condensation or frost conditions between the strainer primary side and secondary side tubing 4 Crossed thermistor Trouble The discharge temperature of the other compressor is high although only this compressor is operating When the liquid valve turns ON the discharge temperature of the other compressor decreases 5 Accumulation of refrigerant in stopped outdoor units Trouble e System is OK when all outdoor units are operating however symptoms of insufficient gas occur when a certain outdoor uni
77. d temperature and outputs the trouble signal In general this indicates trouble with the HIC itself Check the power wiring and connector wiring If the wiring and connectors are normal use a tester to measure the resistance between the compressor HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction 1FAABIB125900 2 HIC CiS06DXH8 HIC PCB If an HIC failure is found replace the PCB nl SE N ee Ee Turn OFF the power and check the continuity of HIC and HIC on the HIC PCB L04 Alarm Outdoor system address duplication Alarm conditions Communication by inter unit control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause Incorrect outdoor system address settings Check the system address settings again Correct the system address settings ee Notes Recovery from this alarm occurs automatically when communication that contains the same address as that unit is not received for 3 minutes after detection 3 19 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes L10 Alarm Alarm code L10 Alarm meaning Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set or the setting is not allowed by the system Probable cause This alarm occurs because the capacity has not been set Check Connect the outdoor unit maintenance remote controller On the outdoor unit EEPROM detailed se
78. dby for heating Compressor 2 constant speed discharge temp sensor Compressor 3 constant speed discharge temp sensor Outdoor air temp sensor rare Protective indoor uni ready lamp biking device a Fan inverter protection function activated keras KES Outdoor uni Compressor thermal protector is activated Thermistor fault Outdoor unit F22 Power supply voltage is unusual More than 260V or less than 160V between L1 and L2 phase dee ae Operating and timer s lamp blinking Failure of nonvolatile memory IC EEPROM on indoor unit control PCB simultaneously wags Operating and timer lamp blinking Failure of nonvolatile memory IC EEPROM on outdoor unit control PCB simultaneously ETE O Protective Overload current detected Compressor 2 constant speed device Compressor 3 constant speed Lock current detected Compressor 2 constant speed Compressor 3 constant speed H22 No current detected when Compressor 1 INV HO3 compressor was ON Compressor 2 constant speed Timer lamp blinking Compressor 3 constant speed Compressor 1 INV HOS Discharge temp sensor trouble Compressor 2 constant speed H15 Outdoor unit protection Low pressure trouble HO6 TE Connection failure of oil detection sensor Compressor 2 constant speed Compressor 3 constant speed Fusing of electromagnetic contact Current detected when compressor was OFF CHECK Automatic backup operation only blinking N
79. de contacts remain together e The conditions of magnet SW operation are poor difficult to open gt When a magnet SW is used in a DC circuit it may be difficult for the SW to open at times In an AC circuit the magnet SW should open instantaneously as long as the current is within the allowable range However this kind of trouble can occur if excessive current flows and may prevent the SW from opening 2 CT circuit failure or PCB failure A D failure e CT circuit contact failure gt Check that the connector is not partially disconnected Wiggle the connector to check the connection These symptoms will not occur if the connector is completely disconnected or the wire is cut In these cases alarm Hx3 occurs e Current of ZA or higher was detected although the compressor was stopped or a higher current was detected at occasional intervals e The compressor continues to operate at a time when the outdoor unit should be stopped such as when all indoor units are stopped gt Check whether or not 200 V is output from the PCB to the magnet SW If the voltage is output there is a PCB failure 3 Installation error e CT1 connector is connected to the compressor 2 side e CT1 circuit is connected to the compressor 2 side e CT2 connector is connected to the compressor 1 side e CT2 circuit is connected to the compressor 1 side 4 Electrical noise Correction 1 Replace the CT circuit 2 Replace the magnet SW 3 Replace the PCB If the ab
80. detection 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis L10 Alarm Outdoor unit capacity not set Alarm conditions The outdoor unit capacity has not been set or the setting is not allowed by the system Probable cause This alarm occurs because the capacity has not been set Check Connect the outdoor unit maintenance remote controller On the outdoor unit EEPROM detailed setting mode screen check the value for the outdoor unit capacity item code 81 Check that it is not set to O or to a capacity that is not allowed Correction If item code 81 is incorrect use the outdoor unit maintenance remote controller and set it correctly After changing the setting be sure to reset both the indoor and outdoor power Example Notes The outdoor unit maintenance remote controller is required in order to set the capacity in the outdoor unit EEPROM L11 Alarm Alarm meaning Installation or connection failure in a common use solenoid valve kit miswiring of indoor unit s remote control group Alarm conditions 1 The connection system with the multiple indoor units at only one solenoid valve kit and installation failure of common use solenoid valve kit L11 alarm occurs in the same series of all remote controllers 2 The connection system with the multiple indoor units at only one solenoid valve kit and wire connection that is not allowed L11 alarm occurs at the only target indoor unit 3 Remote control group wi
81. during heating An air short in the indoor unit during heating Failure of the indoor fan during heating Clogging of the refrigerant circuit Failure of the mechanical valve Failure of the solenoid valve kit Too much refrigerant has been charged Failure of the high pressure switch Make sure that the high pressure switch connector has been properly connected If the high pressure switch is properly connected connect a high pressure gauge to the high pressure outlet port and monitor the pressure during operation to check the pressure when the high pressure switch is activated Check valve failure is likely if the pressure is less than 3 3 MPa The following describes checks to be made when the pressure is high During cooling check whether the outdoor unit heat exchanger is clogged Remove any foreign material that prevents ventilation During cooling check whether an air short blockage has occurred in the outdoor unit The system is operating normally unless the temperature around the outdoor unit is excessively high During cooling check for outdoor fan failure Check whether the screws securing the fan are loose and whether the fan connector in the outdoor unit PCB is properly connected During heating check whether the air filters in the indoor unit are clogged If clogged clean the filters During heating check whether an air short blockage has occurred in the indoor unit The system operates normally unless the temperature around the
82. e or over charging occurs refrigerant is likely to accumulate in the outdoor units or indoor units resulting in a sudden rise in pressure at start that occurs before the refrigerant in the heat exchanger is discharged The representative valves to check are the liquid valves and mechanical valves 3 Outdoor unit PCB failure e The check items are the same as for a high pressure sensor malfunction A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction If an abnormality was found at the check items for a high pressure sensor malfunction first try replacing the PCB and check again Trouble is corrected Outdoor unit PCB failure Trouble is not corrected High pressure sensor malfunction Continued 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis Correction 1 Replace the high pressure sensor Caution Because the high pressure sensor connection employs a Schrader type valve it can be removed and replaced However the high pressure sensor can be easily damaged by high voltage therefore use sufficient caution with regard to static electricity 2 Replace the PCB 3 Correct the locations of problems in the refrigeration cycle e Correct locations where clogging or leakage has occurred e In the case of over charging recover refrigerant Adjust the amount of refrigerant Guide for over charging Be sure to connect the gauge to the high pressure outlet when checking fo
83. e outdoor unit 3 Check the power at the indoor units WET se ee er EI Ie ee ee Ee E24 Alarm EE EA ee Outdoor unit INV failed to receive communications from other outdoor unit constant speed Alarm conditions After initial communications were completed communications from an outdoor unit stopped Probable cause 1 After initial communications were completed the control wiring between main and sub outdoor units was cut 2 After initial communications were completed the outdoor unit power was turned OFF 3 8 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes E25 Alarm Alarm code E25 Alarm meaning Outdoor unit address setting failure duplication Alarm conditions Communication by outdoor unit main sub control wiring was received that contained the same address as that unit 5 times or more within 3 minutes Probable cause The unit number is set incorrectly Check the unit number again Correct the incorrect unit number setting Example Ee oo SO Notes Recovery from this alarm occurs automatically when communication that contains the same address is not received for 3 minutes E26 Alarm Alarm code E26 Mismatch in outdoor unit quantity Alarm conditions After power initialization the set outdoor unit quantity did not match the number of outdoor units detected on the outdoor unit main sub control wiring for 3 minutes or longer 1 The outdoor unit quantity is set incorrectly 2 The outdoor unit
84. e the Test Run 1 Turn the remote power switch on at least 5 Recheck the items to check before the test run hours before the test in order to energize the crankcase heater 2 After performing the leak inspection applying Have the outdoor sub NO vacuum and performing refrigerant charge for units been connected the tubing which is connected on site fully open 4 the outdoor unit service valve However if only 1 YES 1 The unit with the one outdoor unit is installed a balance tube is lt Outdoor unit control PCB gt unit No set to 1 not used Therefore leave the valve fully closed Unit No setting switch S007 et he unitaddress 1S thie main unit 3 When replacing the control PCB be sure that y Ae a ane the settings on the new PCB match those on the outdoor anit coniro Aaea Set the No of outdoor units de Unit No setting switch S006 f 4 Use caution when making the settings If there a are duplicated system addresses or if the lt Outdoor unit control PCB gt y settings for the Nos of the indoor units are not Unit No setting switch Set the No of indoor units consistent an alarm will occur and the system S004 and S005 will not start 5 These settings are not made on the indoor unit PCB Are the inter unit control CASE 1 wires connected to more than 1 refrigerant system NO Check the link wiring lt Outdoor unit control PCB gt Unit No setting switc
85. easure the voltage between plug pin 5 and pins 1 through 4 at the CN230 connector 6P BLU on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between each pair of pins on the electronic control valve connector The connector is normal if all results pin 5 pin 1 pin 5 pin 3 pin 6 pin 2 pin 6 pin 4 are approximately 460 If the results are OQ or replace the coil 3 Crank case heater e Connect a clamp meter to 1 of the 2 crank case heater wires and measure the current The current is normal if the result is 0 15 A or higher As a guide the current should be 0 14 A 180 V 0 17 A 220 V 3 WAY SYSTEM 7 Test Pin Trouble Diagnosis When the test pin on the outdoor unit control PCB is short circuited each part can be operated individually e After turning OFF the main unit power short circuit the test pin CNO22 WHT then turn the power back ON Output is performed in the sequence shown in the table below for 0 5 seconds each _ Output Operation Output Operation Supercooling valve 2 SCV2 12 Pressure balance valve 2 PBV2 3 Relay RY021 Discharge valve 2 DCV2 13 Relay RY003 Crank case 2 CH2 5 R 7 elay RY007 Recovery valve ORVR Relay RY026 Discharge valve 3 DCV
86. efer to the instructions on the following pages e Indoor and outdoor unit power can be turned ON for each system separately gt Case 2 e Indoor and outdoor unit power cannot be turned ON for each system separately Automatic address setting in Heating mode gt Case 3A Automatic address setting in Cooling mode gt Case 3B 1 6 2WAY SYSTEM Address Settings 3 Auto Address Setting Case 2 Automatic Address Setting no compressor operation Indoor and outdoor unit power can be turned ON for each system separately Automatic Address Setting from Outdoor Unit ON 1 Indoor unit addresses can be set without operating the compressors On the No 1 main unit control PCB set the unit No switch S007 to 1 B unit No 1 On the No 2 sub unit control PCB set the unit No switch S007 to g a g unit No 2 3 N On the No 3 sub unit control PCB set the unit No switch S007 to N N g unit No 3 1 2 3 To set the number of outdoor units on the outdoor main unit control PCB set the No of outdoor units DIP switch S006 to ON ON 4 3 units ETE OFF On the outdoor main unit control PCB check that the system address rotary switch S002 is set to 1 and that the DIP switch S003 is set to 0 f m D These are the settings at the time of factory shipment 9
87. en stopped for 60 minutes or longer 3 A D step is 10 steps or less short circuit Probable cause 1 Sensor malfunction e Sensor element malfunction e Sensor wiring is partially disconnected resulting in increased electrical resistance xx This alarm does not occur when the wiring is cut or when the connector is not connected to the outdoor unit PCB 2 Crossed wiring or installation error e The discharge temperature sensor of that compressor is connected to the discharge tube of the other compressor e The connector for the discharge temperature sensor of the problem compressor is connected to the outdoor unit PCB connector for the other compressor 3 Outdoor unit PCB failure 4 The check valve on the discharge tube for that compressor is wet 5 An air short blockage in the area around the outdoor unit has increased the outdoor unit ambient temperature reducing the cooling effects after the compressor stops 6 There is a cause that results in PO3 P17 or PO2 alarm 7 Electrical noise 1 Sensor malfunction and outdoor unit PCB failure Trouble e Constantly indicates a high temperature e When monitoring software or other means are used for monitoring the discharge temperature at times fluctuates suddenly and wildly e In some cases the precise temperature may not be known even when monitoring software is used e Wiggle the sensor and check whether the trouble continues e Check whether the connector is partially disconnected fro
88. er 65 by JIS colorimetric method Optical regeneration deodorant filter High performance filter 65 by JIS colorimetric method 3 0003 Deodorant filter 65 by JIS colorimetric method Table 3 Table of DC Fan Motor Tap Settings Slim Low Static Ducted type Setting No Remote controller setting data Purpose of use names of accessories 0000 Standard setting at time of shipping 1 0001 High ceiling setting 3 0003 Discharge grille purchased separately is installed 2 way lowered ceiling system 2WAY SYSTEM Remote Controller Functions 3 Detailed Settings Function Selecting the DC fan motor tap when setting from the PCB e 4 Way Cassette lt Procedure gt Stop the system before performing these steps Open the electrical component box cover then check the indoor unit control PCB Fig 2 5 Connect the jumper connector 2P yellow which was supplied with the accessory to the correct connector pin on the indoor unit control PCB according to the setting number which was confirmed in Table for DC Fan Motor Tap Settings Setting No 3 Then connect the jumper connector to the connector pin TP3 2P yellow on the indoor unit control PCB Setting No 6 Then connect the jumper connector to the connector pin TP6 2P white on the indoor unit control PCB
89. essor 1 discharge temperature trouble P04 High pressure switch activated P05 Reverse phase or missing phase detected capacity mismatch P14 Ozsensor is activated P16 Compressor 1 overcurrent P17 Compressor 2 discharge temp trouble P18 Compressor 3 discharge temp trouble P20 High load alarm P22 Fan motor trouble P29 Inverter compressor missing phase or lock alarm 5 4 2WAY SYSTEM Service Checker Contents 6 Service Checker 1 Outdoor Unit Maintenance Remote Controller naan ER ee Ee Re Ge ER ee RR GR ee GR ee Ee 6 2 6 1 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller 1 1 Overview m About the outdoor unit maintenance remote controller The outdoor unit utilizes non volatile memory EEPROM on its PCB This allows EEPROM data to replace the setting switches that were present on previous PCBs The outdoor unit mainte nance remote controller is used to set and change these EEPROM data In addition to setting and checking the outdoor unit EEPROM data this remote controller can also be used to monitor the outdoor unit alarm history monitor the various indoor and outdoor tempera tures and check the indoor unit connection status number of units operating mode etc Ourdoor unit maintenance remote controller does not func
90. etting again Display details of LEDs 1 and 2 on the outdoor unit control PCB xt ON Blinking OFF LED 1 LED 2 Display meaning xt xt After the power is turned ON and automatic address setting is not in progress no communication with the indoor units in that system is possible e Xe After the power is turned ON and automatic address setting is not in progress 1 or more indoor units are confirmed in that system however the number of indoor units does not match the number that was set Alternating Automatic address setting is in progress e e Automatic address setting completed wx At time of automatic address setting the number of indoor units did not match the number that was set Simultaneous A when indoor units are operating indication appears on the display sm E Refer to Table of Self Diagnostic Functions and Description of Alarm Displays Alternating Note A indicates that the solenoid is fused or that there is a CT detection current failure current is detected when the compressor is OFF Remote controller display is blinking Hae SEE AE GEREI lid R C No ARE WTS Dl D SUN OSS e ae FE a RS OON ST 1 10 2WAY SYSTEM Address Settings 3 Auto Address Setting Request concerning recording the indoor outdoor unit combination Nos After automatic address setting has been completed be sure t
91. fect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating If unit No AL 2 is displayed the same setting will be made for all indoor units Press the temperature setting Ca Cy _ buttons to select the item code to change Press the timer time 4 v buttons to select the desired setting data For item codes and setting data refer to the following page Press the button The display stops blinking and remains lit and setting is completed Press the button to return to normal remote controller display 2WAY SYSTEM Remote Controller Functions No SET DATA mrt Lene XX PROGRAM Fig 2 1 2WAY SYSTEM Remote Controller Functions 2 Simple Settings Function List of Simple Setting Items tem code Wem Filter sign ON time filter lifetime Degree of filter fouling Central control address Operating mode priority change Setting data Description 0000 0001 0002 0003 0004 0001 0064 Central control address 64 0099 No central control address set setting at time of shipping 0000 Normal setting at time of shipping Not displayed 150 hours 2 500 hours 5 000 hours 10 000 hours Use the filter clogging sensor Standard setting at time of shipping Highly f
92. ferential pressure switch input cr switching 0001 Alarm input for trouble input about air cleaner or similar device 0002 Humidifier input Operates linked with drain pump when humidifier is ON ar Indoor unit electronic 0000 Present Setting at time of shipping LL control valve 0002 None Normal Used as optional relay PCB or JEMA 0000 ar standard HA terminal ec T10 terminal switching 9991 Used for OFF reminder 0002 Fire prevention input 2 8 3 Detailed Settings Function 2WAY SYSTEM Remote Controller Functions Item Setting data Item ae code No Description 0000 No forced operation AE Automatic drain pump 0001 Forced operation for 1 minute Lt operation 2 l 0060 Continuous operation 4 ne 0000 None 4 4 Ventilation fan operation 0001 Ventilation fan operated by remote controller be Da 0000 Not used Body sensor is used AE Wired remote controller sensor EN 0001 Remote control sensor is used I Operation change control in 0000 Normal displayed J progress display 0001 Not displayed AE OFF reminder function for 0000 None ll when weekly timer is used 0001 Only stop time setting is enabled AE 0000 Discharge temperature control OFF AT Discharge temperature control E 0001 Discharge temperature control ON 0013 Control temperature 13 C Heat exchanger tempe
93. g etc 2 Disconnected CT circuit connector 3 Missing phase where CT circuit is connected 4 This CT circuit is connected to the connector of the other CT circuit 5 PCB failure 6 Electrical noise 1 CT circuit failure PCB failure Trouble s Current value during compressor operation is below the threshold value Check Check that the connector is not disconnected e Check the continuity of the CT circuit e Install a normal CT in place of this CT and check If current is detected then the PCB can be judged OK gt CT circuit failure e Check that current is flowing in the phase where the CT circuit is connected Check voltage and current 2 Crossed wiring or installation error Trouble When the compressor is stopped the current value at the other compressor is high r When this type of condition occurs seizing detection control takes priority 3 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument Correction 1 Replace the CT circuit 2 Replace the outdoor unit PCB 3 Correct the problem 1 The connector was not inserted after the PCB was replaced Use a normal CT as a tool to determine whether the trouble is a PCB failure or CT failure H05 H15 H25 Alarm nomeo MENEM temperature sensor disconnected Compressor 3 discharge temperature sensor disconnected Alarm conditions e This alarm occurs w
94. gerant kg Min volume of the indoor unit installed room m lt Density limit kg m The density limit of refrigerant which is used in multi air conditioners is 0 3 kg m ISO 5149 1 If there are 2 or more refrigerating systems in a single refrigerating device the amount of refrigerant should be as charged in each independent device For the amount of charge in this example Outdoor unit e g charged amount 10 kg e g charged amount 15 kg Indoor unit The possible amount of leaked refrigerant gas in rooms A B and C is 10 kg The possible amount of leaked refrigerant gas in rooms D E and F is 15 kg RoHS This product does not contain any hazardous substances prohibited by the RoHS Directive You are requested to use ROHS compliant parts for maintenance or repair A WARNING when the ceiling is 2 7 m high Min indoor floor area 2 3 3 The standards for minimum room volume are as follows No partition shaded a When there is an effective EG with the adjacent room for ventilation of leaking refrigerant gas opening without a door or an opening 0 15 or larger than the respective floor spaces at the top or bottom of the door Outdoor unit Refrigerant tubing Indoor unit If an indoor unit is installed in each partitioned room and the refrigerant tubing is interconnected the smallest room of course bec
95. h S002 and S003 YES Set the system address Note It is not necessary to remove the socket that is used to short circuit the terminal plugs from the outdoor sub unit PCBs When multiple outdoor main units exist disconnect the terminals extended from the shorted plugs CN072 at all outdoor main unit PCBs except for 1 Alternatively move the sockets to the OPEN side Is it possible to turn ON the YES CASE 2 power only for the 1 refrigerant system where Dj the test run will be performed gt y NO Turn ON the indoor and outdoor unit power for that refrigerant system only Will automatic address setting be Make necessary Y performed in Heating mode corrections Es k Short circuit the automatic CASE 3B CASE 3A address pin CN054 on the Turn OFF the outdoor main unit PCB for 1 Is it OK to start Is it OK to start the indoor and outdoor second or longer then release it the compressors compressors unit power Y Y LED 1 and 2 blink alternatel Turn ON the indoor and Turn ON the indoor and about 2 or 3 minutes 4 outdoor unit power outdoor unit power Check the alarm 2 DY Make necessary contents Short circuit the cooling side of the ET corrections T mode change pin CN085
96. hen the discharge sensor temperature detector is not inserted into the tube s sensor holder or when the sensor itself has suffered some kind of malfunction other than a cut wire e When outdoor air temperature is 10 C or higher Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2 C when the compressor has operated for 10 minutes immediately after start e When outdoor air temperature is below 10 C Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2 C when the compressor has operated for 30 minutes immediately after start Probable cause 1 Discharge sensor temperature detector is not inserted into the tube s sensor holder 2 Discharge sensor itself has suffered some kind of malfunction other than a cut wire Check 1 Check that the discharge temperature sensor is inserted into the sensor holder 2 Check that sufficient heat conducting putty is applied 3 Remove the discharge sensor from the sensor holder and expose the sensor to the outside air for approximately 5 minutes Check that the temperature detected by the sensor changes to match the outside air temperature However the sensor cannot detect temperatures at or below 0 C Correction 1 Install the sensor into the holder and apply sufficient heat conducting putty 2 If the sensor is malfunctioning replace it Example Jooo SOS Notes The discharge temperature sensor is generally a sens
97. his alarm is detected after initial communications are completed Therefore it does not occur in cases of disconnected serial connector no terminal unit set or other trouble that occurs before initial communications are completed If initial communications have not been completed alarm E04 occurs E12 Alarm amede ER Automatic address setting start is prohibited Probable cause Automatic address setting is in progress at another outdoor unit unit PCB progress Then start automatic address setting again Exampe J o SOS Notes l gt S O Alarm conditions Automatic address setting was started when automatic address setting was in progress at another outdoor unit in the same link E15 Alarm Alarm code Automatic address setting alarm too few units The number of indoor units was too few when automatic address setting was performed Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW S004 S005 on the outdoor unit PCB is too many 2 The inter unit control wiring between indoor units has been cut Check 1 Refer to the test run servicing materials and check the indoor unit quantity setting SW S004 S005 2 Check the inter unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic address setting again e 9 P022 o JP021 NO 2 2 8
98. ing Mode Indoor and outdoor unit power cannot be turned ON for each system separately In the following automatic setting of indoor unit addresses is not possible if the compressors are not operating Therefore perform this process only after completing all refrigerant tubing work Automatic Address Setting from Outdoor Unit 1 Perform steps 1 4 in the same way as for Case 2 5 Turn the indoor and outdoor unit power ON at all systems 6 To perform automatic address setting in Heating mode on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses short circuit the automatic address pin CN054 for 1 second or longer then release it Be sure to perform this process for one system at a time Automatic address settings cannot be performed for more than one system at the same time l Communication for automatic address setting begins the compressors turn ON and automatic address setting in Heating mode begins All indoor units operate To cancel again short circuit the automatic address pin CN054 for 1 second or longer then release it The LED that indicates automatic address setting is in progress turns OFF and the process is stopped Be sure to perform automatic address setting again Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the main unit control PCB turn OFF 7 At the outdoor main unit in the next
99. instantly detected in the secondary current Secondary 6 horsepower compressors 28A 10 horsepower compressors 36A HIC PCB ETLN tt Power terminal board Inverter compressor Probable cause There is a strong possibility of a compressor failure An alarm occurs for current detection trouble when it is judged that no current is flowing after start DCCT is damaged In this case the cause is a DCCT failure Check the power wiring and connector wiring Correction It is possible to resolve this trouble by limiting the maximum frequency Example 3 23 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes P20 Alarm 1 Forgot to open the valve 2 Operation failure of mechanical valve 3 Idle away of outdoor fan Check Fan motor start failure fan motor Hall IC input failure Possible causes are a Hall IC input circuit failure and a fan HIC failure Check Check the fan motor wiring the Hall IC wiring and the connector connections If the wiring and connectors are normal then check that the capacitor of the Hall IC input circuit is securely soldered on the outdoor unit control PCB Also use a tester and measure the resistance between fan HIC power HIC and ground HIC If there is a short circuit there is an HIC malfunction 2 p E a b Fan PCB FAN C0906DXH8 Fan PCB FAN C1806DXH8 Correction If the fan does not start the below corrections may be effective 1 If there is a f
100. ion sensor discharge discharge sensor at heat temp LPS 1 temp 2 temp exchanger 1 2 SCT EMG plug DISCH1 DISCH2 EXL1 2 CN073 Gas temp Oil detection Comp Outdoor sensor sensor discharge air temp at heat OIL1 2 3 3 temp AIR TEMP exchanger 1 2 DISCH3 EXG1 2 4 2 2WAY SYSTEM PCB Settings 1 Outdoor Unit Control PCB Functions for CR C1155DXHN8 Automatic address setting 2P plug white Automatic address setting pin CNO54 e Short circuit this pin for 1 second or longer to automatically set the addresses at the indoor units that are connected to that outdoor unit and are within the same system e The system address is 1 at the time of shipment Automatic address setting is necessary even for communications lines in a single system where the inter unit control wiring does not cross to any other systems e While automatic address setting is in progress the 2 LEDs LED1 2 red on the outdoor unit control PCB blink alternately Short circuiting this pin while automatic address setting is in progress will stop the automatic address setting operation 002 Rotary switch 10 positions black Outdoor system address setting switch e The setting is 1 at the time of shipment It is not necessary to change the setting if wiring is connected only to an outdoor unit and indoor units in a single system and the inter unit control wiring does not cross multiple systems e If wiring links the inte
101. ir is discharged 5 Press the button again and check the address of each indoor unit in sequence oo 6 Press the button again to return to normal remote controller mode Number changes to indicate which indoor unit is currently selected Indoor unit address MEMO 1 12 2WAY SYSTEM Remote Controller Functions Contents 2 Remote Controller Functions 1 Remote Controller Test Run Settings nannnnnnennsenennnnnnnneenenenannennsnenennnnnnnennenenn 2 2 2 Simple Settings FUREHOR smeren ene ded enen dn N ek ee ee N GN be 2 3 3 Detailed Settings Function s sneren der Ke we ee ee eren dende onervaren Ge be be de os 2 5 4 Remote Controller Servicing Functions nnnnnanannnnnnnenneneennnennennnenennnnnnnnenenennnnnnenn 2 13 2 1 2WAY SYSTEM Remote Controller Functions 1 Remote Controller Test Run Settings Wired Remote Controller Test Run Settings 1 Press the remote controller button for 4 seconds or longer 2 TEST appears on the LCD display while the test run is in progress 3 Then press the L OJ e The temperature cannot be adjusted when in Test Run mode This mode places a heavy load on the machines Therefore use it only when performing the test run e The test run can be performed using the HEAT COOL or FAN operation modes NOTE The outdoor units will not operate for approximately 3 minutes after the power is turned ON and after operation is stopped
102. ircuit 4 Check that valve leakage at a stopped sub unit has not resulted in accumulation of refrigerant at that sub unit 5 Check that no refrigerant leakage has occurred Correction 1 If there was a valve operation failure in general it is necessary to replace the valve 2 If a foreign object or moisture has entered the circuit install a strainer or dry core depending on the degree of the problem 3 If refrigerant has leaked into stopped sub units it is likely that valve leakage has occurred The valve must be replaced Example N O Notes 3 17 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes H08 H27 H28 Alarm Alarm code H08 H27 H28 Alarm meaning Trouble open circuit with the oil sensor connection at compressor 1 compressor 2 or compressor 3 Alarm conditions This alarm occurs when a connector connection pins 1 and 2 for compressor 1 pins 4 and 5 for compressor 2 and pins 7 and 8 for compressor 3 is open Check Check that the connector is securely connected 1 Connect the connector 2 Correct the connection at connector pins 4 and 5 Example J o SOS Notes ooo 3 18 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes H31 Alarm Alarm code H31 Alarm meaning HIC trouble alarm Alarm conditions This alarm occurs when the microcomputer identifies a trouble signal indicating abnormal HIC temperature or other trouble from the HIC The HIC judges the current an
103. k Check that the current value measured with the clamp meter is not lower than the value measured with the PC or remote controller 6 If the cause is still unknown after checking the above then it is possible that noise is the cause of the trouble It is necessary to connect a PC or other instrument Replace the compressor Replace the CT circuit Repair the power circuit Adjust the primary side power Repair the power wiring Replace the outdoor unit PCB Correct the trouble In the case of a compressor failure it is likely that steps must be taken to correct the cause of the compressor failure such as liquid back up in order to prevent recurrence Be sure to check that there is no cause which may resuit in compressor locking Probable cause 1 2 3 4 5 1 Correction EE EES 1 2 3 4 5 6 Example 3 15 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes HO3 H13 H23 Alarm Alarm code HO3 H13 H23 Alarm meaning Compressor 1 CT sensor disconnected or short circuit Compressor 2 CT sensor disconnected or short circuit Compressor 3 CT sensor disconnected or short circuit Alarm conditions Current value at compressor 1 was 18 A or less and at compressors 2 and 3 was 2 A or less when 2 seconds or more had passed after the compressor began operation and output No current is detected even though the compressor is operating Probable cause 1 CT circuit failure including cut wirin
104. ked The detected discharge temperature is high e Although such conditions rarely occur a P02 alarm is likely if the detected discharge temperature is low e Replace the sensor with another discharge sensor and compare the temperature conditions 7 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Correct the problem locations All of the probable causes Notes Operates continuously for a set length of time Indicates 2 5 minutes or longer for an inverter unit and 30 seconds or longer for a constant speed compressor 3 21 3 4 5 6 7 8 9 1 Check 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes P04 Alarm ermede Ba o High pressure switch activated Alarm conditions The operation of the electronic circuit in the high pressure switch may short circuit the terminal depending on the pressure A pressure of 3 3 MPa or above will short circuit the terminal Once the terminal is short circuited it will remain in that state until the pressure goes below 2 6 MPa Probable cause Failure of the check valve in the compressor discharge tube The service valve is closed Clogging of the outdoor heat exchanger during cooling An air short in the outdoor unit during cooling Failure of the outdoor fan during cooling Clogging of the air filter in the indoor unit
105. ller Check that the wired remote controller wiring and the inter unit control wiring are connected correctly Check that the indoor unit power is ON e Causes and corrections in instances when automatic address setting starts but cannot be completed successfully Trouble Cause and correction An alarm appears on the wired remote controller sometime from several seconds to several minutes after automatic address setting is started LED 1 and 2 on the outdoor unit control PCB indicate that automatic address setting is in progress the LEDs blink alternately for several minutes after automatic address setting is started the compressors may also start and stop several times however LED 1 and 2 never indicate that automatic address setting is completed turn OFF Check the Alarm Display table and correct the problem See page 3 2 to 3 4 Check the alarm details on the Outdoor Unit Control PCB LED 1 and 2 Alarms then correct the problem e If alarm E15 E16 or E20 appears after automatic address setting is started check the following items Alarm display Alarm description The number of indoor units detected during automatic address setting was smaller than the number of E15 indoor units which was set with switch S004 and S005 on the outdoor unit PCB E16 The number of indoor units detected during automatic address setting was larger than the number of indoor units which was
106. ly this compressor is operating When the liquid valve turns ON the discharge temperature of the other compressor decreases 5 Accumulation of refrigerant in stopped outdoor units Trouble e System is OK when all outdoor units are operating however symptoms of insufficient gas occur when a certain outdoor unit is stopped e Condensation or frost is visible up to the top of the accumulator of the stopped outdoor unit e After an outdoor unit stops there is the sound of refrigerant flowing into an outdoor unit that was stopped for a long time e When an outdoor unit starts after being stopped for a long time the start is accompanied by much vibration Check e Representative parts include the liquid capillaries secondary side of capillaries will be cool during cooling operation mechanical valve mechanical valve bypass check valve sound of refrigerant flow can be heard and stops when the liquid valve is closed hot gas defrost valve if valve secondary side remains hot even after much time has passed be careful not to mistake transmitted heat for a valve failure e Ice is growing on the lower parts of some outdoor unit heat exchangers but not on others Because this trouble may occur even in outdoor units with a high operating rate under conditions of insufficient gas caution is needed 6 Sensor failure Check e This alarm is likely to occur when wiring is partially cut It is difficult to identify even when continuity is chec
107. m history alarm data are displayed The outdoor unit address is displayed as R C XX YY R C XX Outdoor unit system address YY Outdoor unit address Item codes 01 08 are displayed 01 indicates the most recent alarm The alarm history displays the alarm code If no alarms are present then __ __ is displayed To clear the alarm history press the CANCEL button The outdoor unit alarm history will be cleared 6 To exit press the A CHECK button The display returns to the normal display 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller 1 6 Setting the outdoor unit EEPROM data A Display of first 4 digits This function is used to make the outdoor unit EEP ROM data settings E Setting mode 1 Press and hold the 4 CHECK button and the 5 VENTILATION button simultaneously for 4 seconds or longer Press the temperature setting Ca and C7 buttons to change the item code The item codes and setting data are shown in the table of List of Item Codes on the next page Press the timer time 4 and buttons to change the setting data To confirm the changed setting data press the SET button At this time the SET DATA display stops blinking and remains lit During this mode SET DATA is displayed blinking The outdoor unit address display section displays
108. m the PCB yy An F04 alarm will not result if the connector is completely disconnected circuit is open e f the cause is still uncertain check the following to determine whether a sensor or PCB failure has occurred Step 1 Connect the other compressor discharge sensor or a discharge sensor where the FO4 alarm has not occurred to the connector for this compressor on the PCB Measure the temperature at the same point a location where temperature fluctuations are small and check whether there is a temperature difference Difference gt A PCB or sensor failure is possible No difference gt PCB and sensor are normal If an abnormality was found at Step 1 connect the problem compressor sensor to the other compressor connector on the PCB or to the PCB connector of a device where the F04 alarm has not occurred Measure the temperature at the same point a location where temperature fluctuations are small and check whether there is a temperature difference Difference Sensor failure No difference PCB failure Xx It is convenient at this time to have a discharge temperature sensor on hand 2 Crossed wiring or installation error Trouble Although the other compressor is operating and this compressor is stopped the discharge temperature of the other compressor does not increase and the discharge temperature of this compressor rises The discharge temperature remains high immediately after the compressor stops Wait for some time afte
109. mpleted Therefore it does not occur in cases of disconnected serial connector no terminal unit set or other trouble that occurs before initial communications are completed If initial communications have not been completed alarm E04 occurs E12 Alarm Alarm code E12 Alarm meaning Automatic address setting start is prohibited Alarm conditions Automatic address setting was started when automatic address setting was in progress at another outdoor unit in the same link Probable cause Automatic address setting is in progress at another outdoor unit Check This alarm is not displayed on the remote controller Therefore check the blinking on the outdoor Wait for automatic address setting to be completed at the outdoor unit where it is currently in progress Then start automatic address setting again Alarm conditions The number of indoor units was too few when automatic address setting was performed Probable cause 1 The number of indoor units set at the indoor unit quantity setting SW S004 S005 on the outdoor unit PCB is too many 2 The inter unit control wiring between indoor units has been cut Check 1 Refer to the test run servicing materials and check the indoor unit quantity setting SW S004 S005 2 Check the inter unit control wiring at the indoor and outdoor units Correction After correcting the indoor unit quantity setting or the inter unit control wiring perform automatic address setting again
110. n trouble 5 20 5 18 5 18 H21 5 17 H22 5 17 H23 5 18 H25 5 18 H27 Compressor 2 oil detection sensor connection trouble 5 20 H28 Compressor 3 oil detection sensor connection trouble 5 20 H31 HIC trouble alarm L04 Outdoor system address duplication Outdoor unit capacity not set Incorrect wiring of remote group control wiring in case of shared solenoid valve kit Outdoor unit model mismatch 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis Compressor 1 discharge temperature trouble High pressure switch activated Reverse phase or missing phase detected Compressor 1 INV overcurrent Compressor 2 discharge temperature trouble Blinking Inspection Display on the remote CHECK blinking 1 controller CHECK blinking 2 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis E06 Alarm es EE Ee ea Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit Alarm conditions Outdoor unit failed to receive serial communication signals from indoor unit Probable cause 1 The indoor unit power was cut OFF after initial communications were completed 2 An open circuit or short circuit occurred in the inter unit control wiring after initial communications were completed Check Check the power at the indoor and outdoor units and check the inter unit control wiring Correction S SOS Exampe l o E Notes This alarm is detected after initial communications are co
111. n SettingsS iss ee ee ee RR AA ee ee 2 2 2 Simple Settings FUNCOM ESE ee EE AE ee GE Ge 2 3 2 Detailed Settings BURE ER EE GN Re ee Se be ee Re Ee 2 5 4 Remote Controller Servicing FUNCTIONS iese ee AR ee ee 2 13 3 Trouble DIAANSSIS see EA Ke ER RE de N ei ge od N N Geb Ge REEN 3 1 1 Contents of Remote Controller Switch Alarm Display neee 3 2 2 Outdoor Unit Control PCB LED Display is osse Se GE Ge SE ee 3 4 3 2WAY AN C OdES santen tented uae ee Re ee EE 3 5 4 Blinking Inspection Display on Remote Controller sesse 3 26 5 Symptom Thermostat in OFF continues or cycles OFF amp ON too frequently 3 28 Maer le CA 4 1 1 Outdoor Unit Control POB ane ennen tetes 4 2 5 Self Dlagnostics Function Table verraad KW GN neer AE AG Reese Dk ei GE Oe de 5 1 1 Self Diagnostics Function Table RE ER REEN RE SERE ER RE ENE serene 5 2 6 Service CHECK EM na kassies EER Eis iN NN EN ves EA EK sie dn ES Dee de nin des nnn EN Re ii uk ea RE DE died 6 1 1 Outdoor Unit Maintenance Remote Controller neee 6 2 MEMO 2WAY SYSTEM Address Settings Contents 1 Address Settings Outdoor Units 1 Test IE EE EA N eed 1 2 2 Settings of Indoor Unit Control POB snoeren eks een ge ee ke We EN kes EE ie eke 1 3 3 AUTO Address Setine ass wi eden aaneen san alde enden AN we nee 1 5 1 1 1 Test Run Test Run Procedure 2WAY SYSTEM Address Settings Items to Check Befor
112. neously for 4 seconds or longer If group control is in effect press the UNIT button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating MB unit No group control item code XX and settings data YYYY are displayed blinking on the remote controller LCD display 1 or Ag L in the case of Designate the item code XX by adjusting the Temperature Setting Ca Cv buttons Electrical component box Flap 1 XX 90 E N AN Flap 2 XX 91 Flap 4 XX 93 OO E J Flap 3 XX 92 2 6 2WAY SYSTEM Remote Controller Functions Press the timer time 4 v buttons to select the desired setting data PT De 3 4 Flap position Fig 2 3 Setting data YY Y Y refer to Fig 2 3 Setting data Flap position during operation EDDIE Without separate setting Pit Fa 4 Swing an ie Move to position 1 and stay EAE Move to position Z and stay Move to position 3 and stay al E AKA Eee Z Ka E 2 3 Move to position 4 and stay 5 Move to position 5 and stay mba X Dae When the flap position is set to 4 or 5 and the unit
113. ng Compressor 1 discharge temperature sensor disconnected Compressor 2 discharge temperature sensor disconnected Compressor 3 discharge temperature sensor disconnected Alarm conditions e This alarm occurs when the discharge sensor temperature detector is not inserted into the tube s sensor holder or when the sensor itself has suffered some kind of malfunction other than a cut wire e When outdoor air temperature is 4 C or higher Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2 C when the compressor has operated for 10 minutes immediately after start e When outdoor air temperature is below 4 C Alarm occurs if the temperature detected by the discharge sensor has changed by less than 2 C when the compressor has operated for 30 minutes immediately after start Probable cause 1 Discharge sensor temperature detector is not inserted into the tube s sensor holder 2 Discharge sensor itself has suffered some kind of malfunction other than a cut wire Check 1 Check that the discharge temperature sensor is inserted into the sensor holder 2 Check that sufficient heat conducting putty is applied 3 Remove the discharge sensor from the sensor holder and expose the sensor to the outside air for approximately 5 minutes Check that the temperature detected by the sensor changes to match the outside air temperature However the sensor cannot detect temperatures at or below 0 C 1 Install the
114. nit is detecting error signal from remote controller and system controller Indoor unit is detecting error e Error in receiving serial communication signal signal from outdoor unit e When turning on the power supply the number of connected indoor units does not correspond to the number set Except R C address is 0 E04 Heating ready lamp E06 e Group wiring failure of indoor units in the refrigerant system blinking occurring when remote controller is operated immediately e e Ees after automatic address setting Outdoor unit is detecting error e Error in receiving serial communication signal signal from indoor unit e There is an indoor unit which does not send signals when the power is ON improper setting e Duplicated remote controller main setting s F z EE Operating lamp Improper setting Automatic address setting start is prohibited blinking AP pin was short circuited at time when automatic address E12 setting was started Xt Error of main indoor unit in receiving serial communication error of group control wiring signal from sub indoor units During auto address setting number of connected units does not correspond to number No indoor unit is connected during auto address setting E20 Heating ready lamp aes pinning o oi signal from main outdoor unit Improper setting o Operating and heating rn ee ae x Incorrect wiring of remote group control wiring in case of xt shared solenoid val
115. o display changes lt lt gt gt alarm indication Does not affect the operation of other indoor units lt gt alarm indication In some cases may affect the operation of other indoor units 3 3 2WAY SYSTEM Trouble Diagnosis 2 Outdoor Unit Control PCB LED Display O ON TE Blinking OFF RED LEB Display meaning 1 2 O O After the power is turned ON and automatic address setting is not in progress no communica EE EE tion with the indoor units in that system is possible Both ON O After power is turned ON and automatic address setting is not in progress one or more indoor AE E ei units are confirmed in that system however the number of indoor units does not match the OFF ON number that was set Automatic address setting was completed successfully After the power is turned ON and auto ES EE tiza tin matic address setting is not in progress the number of detected indoor units connected to that Both OFF system matches the number that was set and regular communications are occurring Automatic address setting is in progress At time of automatic address setting the number of indoor units did not match the number that was set Blinking alternately Alarm display LED 1 blinks M times then LED 2 blinks N times The cycle then repeats M 2 Palarm 3 Halarm 4 Ealarm 5 Falarm 6 Lalarm N Alarm No Example LED 1 blinks 2 times then
116. o record them for future reference List the outdoor main unit system address and the addresses of the indoor units in that system in an easily visible location next to the nameplate using a permanent marking pen or similar means that cannot be abraded easily Example Outdoor 1 Indoor 1 1 1 2 1 3 Outdoor 2 Indoor 2 1 2 2 2 3 These numbers are necessary for later maintenance Please be sure to indicate them Checking the indoor unit addresses Use the remote controller to check the indoor unit address elf 1 indoor unit is connected to 1 remote controller gt 1 Press and hold the button and E button for 4 seconds or longer simple settings mode 2 The address is displayed for the indoor unit that is connected to the remote controller Only the address of the indoor unit that is connected to the remote controller can be checked 3 Press the button again to return to normal remote controller mode Number changes to indicate which indoor unit is currently selected Indoor unit address lt lf multiple indoor units are connected to 1 remote controller group control gt 1 Press and hold the button and button for 4 seconds or longer simple settings mode 2 ALL is displayed on the remote controller Next press the button 4 The address is displayed for 1 of the indoor units which is connected to the remote controller Check that the fan of that indoor unit starts and that a
117. of a compressor failure is low Check the power wiring and connector wiring Correction It is possible to resolve this trouble by limiting the maximum frequency Example mn Notes o O 4 3 WAY ECO i Alarm Codes 3 WAY SYSTEM 5 Blinking Inspection Display Trouble Diagnosis P29 Alarm Ne ee Alarm meaning Inverter compressor missing phase or lock alarm Alarm conditions This alarm may occur at start and occurs when missing phase or lock is detected and when a DCCT failure occurs Probable cause Generally this alarm occurs when the refrigerant pressure balance is uneven at start or when inverter compressor lock occurs there is a missing phase in the inverter compressor wiring or a DCCT failure occurs This can be judged to be starting trouble which is not caused by HIC Exampe en enne Use a tester to measure the voltage between the DCCT output terminal on the rear of the PCB and the ground If the voltage is not within 2 3 V then the DCCT has malfunctioned CAUTION Currently the blinking inspection display can be displayed only on the wired remote controller and system remote controller Blinking inspection display 1 Automatic backup Alarm code Blinking inspection display Alarm meaning Automatic backup is in progress A C units can be operated Status The compressor at one of the outdoor units where the outdoor unit fan is running should be operating Blinking inspection display also occurs
118. oise High pressure sensor failure e Check the sensor resistance value Use a tester and measure the resistance between sensor No 1 and No 3 Resistance of less than 10kQ indicates a short circuit or other trouble Resistance of 10kQ 200kQ is normal Resistance of more than 200kQ indicates an open circuit or other trouble e Connect a gauge to the high pressure outlet and check for changes in the value dispalyed by the monitoring software and for large deviation of the gauge pressure e During heating check whether the temperature is lower than the highest indoor unit E1 temperature The pressure detected by the high pressure sensor is the highest pressure in the system Therefore during heating the converted saturation temperature will never be lower than any indoor unit E1 temperature During cooling this temperature will never be lower than the outdoor unit liquid temperature 2 Failure to open the service valve clogged tubing valve leakage over charging In all of these cases an alarm occurs when there are rapid pressure fluctuations and tracking of the detected pressure is poor e Check the open closed status of the valve e Check for clogging of the tubing To check for clogging disconnect the high pressure sensor from the PCB and check whether the high pressure SW activates e Check for valve leakage and over charging When valve leakage or over charging occurs refrigerant is likely to accumulate in the oudoor units or
119. old for the detected current is 7A or more continuing for 2 seconds Probable cause 1 Magnet SW malfunction e The magnet SW has seized and the compressor is continuing to run gt Even when the power is turned OFF the primary side and secondary side contacts remain together e The conditions of magnet SW operation are poor difficult to open gt When a magnet SW is used in a DC circuit it may be difficult for the SW to open at times In an AC circuit the magnet SW should open instantaneously as long as the current is within the allowable range However this kind of trouble can occur if excessive current flows and may prevent the SW from opening 2 CT circuit failure or PCB failure A D failure e CT circuit contact failure gt Check that the connector is not partially disconnected Wiggle the connector to check the connection These symptoms will not occur if the connector is completely disconnected or the wire is cut In these cases alarm Hx3 occurs e Current of 7A or higher was detected although the compressor was stopped or a higher current was detected at occasional intervals e The compressor continues to operate at a time when the outdoor unit should be stopped such as when all indoor units are stopped gt Check whether or not 200 V is output from the PCB to the magnet SW If the voltage is output there is a PCB failure 3 Installation error e CT2 connector is connected to the compressor 3 side e CT2 circuit is connected
120. omes the object But when mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded the volume of the next smallest room becomes the object Refrigerant tubing Outdoor unit Indoor unit Medium Large room room Mechanical ventilation device Gas leak detector The minimum indoor floor space compared with the amount of refrigerant is roughly as follows When the ceiling is 2 7 m high ms 337 5 324 0 310 5 297 0 283 5 270 0 256 0 243 0 229 5 216 0 52025 S 189 0 5175 5 3162 0 5148 5 135 0 gt 101 5 108 0 94 5 81 0 67 5 54 0 40 5 27 0 13 5 0 0 Range below the density limit of 0 3 kg m Countermeasures not needed Range above the density limit of 0 3 kg m8 Countermeasures needed O 10 20 30 40 50 60 70 80 90 100kg Total amount of refrigerant Contents 1 Address Settings Outdoor VATS iese ten ee Ge he n Gee AG deed Ge Ke ennn dnek derden nand 1 1 N ii EE RR EE ER 1 2 2 Settings of Indoor Unit Control PCB ER Gee denten 1 3 eo eli eN RE EE EE ON 1 5 2 Remote Controller Functions sisie Ede N si KEN N ee ee ew ek Re ee enn AN EE ke ie ed 2 1 1 Remote Controller Test Ru
121. ontrol wiring E29 Alarm ss 2 aa n Outdoor unit failed to receive communication from outdoor unit main Alarm conditions Outdoor unit communications from outdoor unit main were interrupted for 3 minutes or longer Probable cause 1 After initial communications were completed the outdoor unit main sub control wiring was Cut 2 After initial communications were completed the RC connector became disconnected 3 The power at the outdoor unit main unit is turned OFF Check 1 Check the outdoor unit main sub control wiring 2 Check the RC connectors 3 Check the power at the outdoor unit main Correction 1 Repair the outdoor unit main sub control wiring 2 Correct the RC connector connection 3 Turn ON the outdoor unit main power Example J gt o oO Notes o O 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis F04 F05 F22 Alarm sensor trouble Compressor 3 discharge temperature sensor trouble Alarm conditions 1 Discharge temp of 100 C or higher was detected 20 minutes or more after that compressor stopped operating 2 Discharge temp of 80 C or higher was detected after all compressors had been stopped for 60 minutes or longer 3 A D step is 10 steps or less short circuit Probable cause 1 Sensor malfunction e Sensor element malfunction e Sensor wiring is partially disconnected resulting in increased electrical resistance x This alarm does not occur when the wiring is cu
122. or intended for accurate detection of high temperatures Therefore it will not accurately detect the temperature if the temperature at the measurement point is 20 C or below 3 16 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes HO6 Alarm Aismoodo WS Alarm conditions A report occurs during A C operation when the low pressure sensor installed at constant low pressure parts detects a pressure of 0 05 MPa or less continuously for 2 minutes or an instantaneous pressure of 0 02 MPa or less These values represent abnormal low pressure which may damage the compressor However the alarm does not actually occur the first 2 times that the above operation takes place At these times the outdoor unit is stopped and the conditions are monitored The alarm occurs when the above operation occurs for the fifth time The first 4 times before the alarm occurs are called pre trip After pre trip occurs if the low pressure sensor detects a pressure of 0 15 MPa or more for 3 minutes of continuous operation the pre trip count is reset to 0 If the low pressure sensor detects a pressure of 0 16 MPa or less continuously for 30 minutes when the compressor is stopped an alarm occurs immediately no pre trip Probable cause The A C unit low pressure has dropped to a level that does not occur under ordinary conditions 1 The absolute amount of gas in the system is too low as a result of insufficient refrigerant charge or leak
123. or where the FO4 alarm has not occurred to the connector for this compressor on the PCB Measure the temperature at the same point a location where temperature fluctuations are small and check whether there is a temperature difference Difference gt A PCB or sensor failure is possible No difference PCB and sensor are normal If an abnormality was found at Step 1 connect the problem compressor sensor to the other compressor connector on the PCB or to the PCB connector of a device where the F04 alarm has not occurred Measure the temperature at the same point a location where temperature fluctuations are small and check whether there is a temperature difference Difference Sensor failure No difference PCB failure X It is convenient at this time to have a discharge temperature sensor on hand 2 Crossed wiring or installation error Trouble Although the other compressor is operating and this compressor is stopped the discharge temperature of the other compressor does not increase and the discharge temperature of this compressor rises The discharge temperature remains high immediately after the compressor stops Wait for some time after the compressor stops and observe Check for crossed wiring and installation errors Continued 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis Check 3 Leakage from the discharge tube check valve Trouble Although the other compressor is operating and this compressor is stoppe
124. orrespond to the number set Except R C address is 0 E04 Heating ready lamp e Group wiring failure of indoor units in the refrigerant system blinking occurring when remote controller is operated immediately e e E06 blinking tie Duplicated outdoor unit address E25 Mismatch in No of outdoor units setting E26 E29 Error of sub outdoor unit in receiving serial communication Improper setting i Operating and heating Duplicated indoor unit priority non priority indoor unit and ready lamps blinking outdoor unit LOG simultaneously ex Indoor unit address is not set L08 Xt Capacity code of indoor unit is not set lt lt L09 gt gt Mismatch of outdoor unit type 4 way valve operation failure Duplication of outdoor R C address setting L04 Operating and heating Capacity code of outdoor unit is not set vo ready lamps blinking L10 simultaneously Group control wiring is connected to individual control indoor unit LE O f Indoor unit Indoor coil temp sensor E1 Operating and Indoor coil temp sensor E3 timer lamps blinking F alternately Indoor suction air room temp sensor i Indoor discharge air temp sensor i os Continued 2WAY SYSTEM Trouble Diagnosis 1 Contents of Remote Controller Switch Alarm Display ON O Blinking lt t OFF Wired remote control display Wireless remote controller receiver display Possible cause of malfunction Operation Stan
125. ouled Filter sign ON time is reduced to one half the set time Central control address 1 Central control address 2 Central control address 3 Fan speed when heating thermostat is Heating intake temperature shift Electric heater installation Humidifying when heater thermostat is OFF 0001 Priority Compressor ON Compressor OFF No heater Heater installed 0000 No setting at time of shipping Permit prohibit automatic heating cooling e In order to avoid water leakage and vaporizing humidifier is used 0001 Yes 0000 Permit 0000 Normal 0001 Cool only Set 1 for item code OD damage to the fan do not set for humidifying when the thermostat is OFF unless a e Consider the device purpose and type when changing the settings Incorrect settings may result in malfunction Do not change any setting data that does not appear in this list 2 4 3 Detailed Settings Function e This allows the system address indoor unit address and other settings to be made for the indi vidual or group control indoor unit to which the remote controller used for detailed settings is con nected When detailed settings mode is engaged opera tion stops at the individual or group control indoor unit where the remote controller used for detailed settings is connected Simple settings items can also be set at this time lt Procedure gt Press and hold the 4 GET and E buttons sim
126. ove probable causes are not the cause of the alarm it is possible that in rare cases the alarm may be caused by the effects of noise See notes The effects of electrical noise are difficult to identify unless a PC is connected and the conditions are monitored for a long period of time y 3 WAY SYSTEM 6 Inspection of Parts Trouble Diagnosis 1 High pressure switch 63PH1 63PH2 63PH3 e 63PH1 Disconnect the CN042 connector 3P WHT from the outdoor unit control panel Measure the resis tance between socket pins 1 and 3 The resistance is OK if the result is 0 Q e 63PH2 Disconnect the CN044 connector 3P RED from the outdoor unit control panel Measure the resis tance between socket pins 1 and 3 The resistance is OK if the result is 0 Q e 63PH3 Disconnect the CN233 connector 3P YEL from the outdoor unit control panel Measure the resis tance between socket pins 1 and 3 The resistance is OK if the result is 0 Q 2 Electronic control valve MOV1 MOV2 MOV3 MOV4 After removing the connector from the PCB use the following methods to check the valves e MOV1 Measure the voltage between plug pin 5 and pins 1 through 4 at the CNO15 connector 6P WHT on the outdoor unit control PCB Because of the pulse output a simplified measurement method is used Set the tester to the 12 V range if the value displayed is approximately 4 V then the voltage is normal When the voltage is normal measure the resistance between e
127. pen circuit Probable cause 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction Example J gt s O Notes F07 F24 F26 Alarm Alarm code F07 F24 F26 Liquid temperature sensor trouble at outdoor heat exchanger 1 Liquid temperature sensor trouble at outdoor heat exchanger 2 Liquid temperature sensor trouble at outdoor heat exchanger 3 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer Correction J o O Example J gt s O Notes o OE 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis F08 Alarm Es TR ae Alarm meaning Outdoor air temperature sensor trouble Alarm conditions 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit Probable cause 1 Sensor malfunction including connector 2 PCB malfunction 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote con
128. r temperature Air Temp continuously for 5 minutes or longer or the detected suction temperature SCT was 20 C or more above the outdoor air temperature continuously for 5 minutes or longer Probable cause 1 The 4 way valve connector 20S CNO22 has become disconnected from the control PCB 2 The 4 way valve circuit is locked malfunctioning Check 1 Check the 4 way valve connector 20S CN022 EE 2 If the connector is normal check the 4 way valve wiring and the PCB circuit Bane TE o Notes P02 Alarm Compressor thermal protector is activated trip only and no alarm Alarm conditions When the current is not detected over 4 seconds long after the compressor ON Probable cause Activating condition of the compressor thermal protector The voltage is more than 260V or less than 160V between L and N phase 1 Check the constant speed compressor 2 Check the current transformer Put the constant speed compressor OFF over 60 minutes and cool the thermostat Replace defective parts with new ones Example l Notes e O 3 20 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes P03 P17 P18 Alarm Compressor 1 discharge temperature trouble Compressor 2 discharge temperature trouble Compressor 3 discharge temperature trouble Alarm conditions Temperature is 106 C or higher and pre trip stop has occurred The alarm occurs when pre trip stop occurs more than once However the pre trip co
129. r is to be installed requires a design that in the event of refrigerant gas leaking out its density will not exceed a set limit The refrigerant R410A which is used in the air conditioner is safe without the toxicity or combustibility of ammonia and is not restricted by laws imposed to protect the ozone layer However since it contains more than air it poses the risk of suffocation if its density should rise excessively Suffocation from leakage of refrigerant is almost non existent With the recent increase in the number of high density buildings however the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space individual control energy conservation by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners If a single unit of the multi air conditioner system is to be installed in a small room select a suitable model and installation procedure so that if the refrigerant accidentally leaks out its density does not reach the limit and in the event of an emergency measures can be made before injury can occur In a room where the density may exceed the limit create an opening with adjacent rooms or install mechanical ventilation combined with a gas leak detection device The density is as given below Total amount of refri
130. r over charging During cooling The following does not apply when outdoor air temperature is low or when fan speed is controlled When both compressor 1 and compressor 2 are operating and the fan mode is 14 maximum fan speed then the high pressure saturation temperature should be approximately 15 C above the outdoor air temperature If it is 5 C or more above this level then it is possible that over charging may have occurred During heating There is an indoor unit where refrigerant flow is poor E1 temperature and discharge temperature are low and the mechanical valve of that unit is opened to 300 pulses or more and the E1 temperature is close to room temperature However be aware that this kind of data results often when there is a height difference between indoor units Reducing the amount of refrigerant will improve the refrigerant flow however reducing it too much will increase the likelihood of alarms related to low oil level scroll side the low pressure SW and discharge temperature Use caution Example This alarm may result when the service valve is closed or when valve leakage particularly from the mechanical valve occurs F17 Alarm Alarm conditions 1 Sensor short circuit ee 2 Sensor open circuit 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote monitor or a PC monitor to check the tempera
131. r the compressor stops and observe Check for crossed wiring and installation errors Continued 3 10 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes 3 Leakage from the discharge tube check valve Trouble Although the other compressor is operating and this compressor is stopped the discharge temperature of this compressor rises together with the temperature of the other compressor 4 The ambient temperature around the outdoor unit when it is stopped is 43 C or higher 5 If the cause is still unknown after checking the above then it is possible that electrical noise is the cause of the trouble It is necessary to provide a line filter or carry out other noise countermeasures Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Carry out noise countermeasures 4 Repair the refrigerant tubing 5 Adjust the amount of refrigerant 6 Correct the trouble Example 1 Sensor wiring is partially cut Notes This alarm does not indicate that the sensor is disconnected In order to prevent overheating during operation the outdoor units in this system will not allow a compressor to start if the discharge temperature does not decrease while the compressor is stopped If a sensor malfunction results in continuous detection of a high discharge temperature then the compressor may stop for no apparent reason The purpose of this alarm is to facilitate identification of the problem in this case F
132. r unit control wiring for multiple systems to the same communications lines then a different address must be set for each refrigerant tubing system e If wiring links multiple systems a maximum of 30 systems up to 64 indoor units can be connected This setting can be set up to 39 however control will be for 30 systems even if the setting is set to higher than 30 An alarm will be displayed if system addresses are duplicated For details refer to Table 1 S003 DIP switch 2P blue Switches for setting system address 10s digit and 20s digit e If 10 systems or more are set the setting is made by a combination of this DIP switch and S002 e If 10 19 systems are set set switch 1 10s digit to ON e If 20 29 systems are set set switch 2 20s digit to ON and set switch 1 10s digit to OFF e If 30 systems are set set both switch 1 10s digit and switch 2 20s digit to ON For details concerning S002 and S003 refer to Table 1 S004 Rotary switch 10 positions red Switch for setting the number of connected indoor units In order to allow the outdoor unit to manage indoor units in the same refrigerant system set the number of connected indoor units For details refer to Table 2 S005 DIP switch 3P blue Switches for setting the 10s 20s and 30s digit for the number of connected indoor units e If 10 systems or more are set the setting is made by a combination of this DIP switch and S004 e If 10 19 system
133. r valve leakage at the stopped outdoor unit 5 A valve ORVR BALV BPB in the oil circuit has malfunctioned or there is clogging of the circuit capillaries which returns oil from the oil separator to the compressor 6 If an excessive amount or liquid returns to the compressor oil foaming may increase oil discharge The same occurs when the refrigerant proportion in the compressor is high at start due to an open circuit in the crank case heater 7 Oil sensor disconnected or open circuit 1 Check the tubing length and height differences 2 Check the operation of system circuit valves 3 Check that there is not an excessive amount of liquid return Check that there is no mechanical valve leakage 4 Check the crank case heater wintertime 5 Check that the oil sensor is not disconnected and that the circuit is not open 1 If insufficient oil is a possibility then charge with additional oil 2 If it is clear that a valve failure has occurred replace the valve Example O Notes N O H08 H27 H28 Alarm Alarm meaning Trouble open circuit with the oil sensor connection at compressor 1 compressor 2 or compressor 3 Alarm conditions This alarm occurs when a connector connection pins 1 and 2 for compressor 1 pins 4 and 5 for compressor 2 and pins 7 and 8 for compressor 3 is open Probable cause Disconnected connector Check that the connector is securely connected 1 Connect the connector 2
134. rated Communications with the outdoor unit are not possible The remote controller is not connected correctly trouble with sending of the signal from the E02 remote controller to the indoor unit PO9 The indoor unit ceiling panel connector is not connected correctly 5 3 2WAY SYSTEM Self Diagnostics Function Table 1 Self Diagnostics Function Table e The outdoor unit maintenance remote controller can be used to check the alarm display The number of times that LED 1 and 2 blink on the outdoor unit control PCB can be used to check the alarm display Refer to Checking the LED 1 and 2 Alarm Display on the Outdoor Unit Control PCB Alarm code Alarm meaning E06 Outdoor unit failed to receive serial communication signals from indoor unit E12 Automatic address setting start is prohibited E15 Automatic address setting alarm too few units E16 Automatic address setting alarm too many units E20 No indoor units at automatic address setting E24 Outdoor unit failed to receive communications from another outdoor unit E25 Outdoor unit address setting failure duplication E26 Mismatch in outdoor unit quantity E29 Outdoor unit failed to receive communication from another outdoor unit E30 Outdoor unit serial communications failure E31 Communication error between the microcomputers FO4 Compressor 1 discharge temperature sensor trouble DISCH1 F05 Compressor 2 discharge temperature sensor trouble DISCH2 F06 Ga
135. rature 0014 Control temperature 14 C i for cold air discharge AL Heat exchanger control point l l for control to prevent cold air 0025 Control temperature 25 C 0026 Control temperature 26 C Output linked with fan ON when indoor unit fan is p itchi 0000 operating A Fan output switching p 9 0001 Fan mode operation output 0000 No delayed start 0001 1 sec delayed start 0002 2 sec delayed start dE Drain pump delayed start time 0058 58 sec delayed start 0059 59 sec delayed start 0060 60 sec delayed start 0000 Humidifier output OFF Drain pump stopped Lam 0001 Humidifier output ON Drain pump operates Ths Humidifier setting 0002 Humidifier output ON Drain pump operates for 1 minute when total humidifier operating time reaches 60 minutes 0003 Humidifier output ON Drain pump stopped 0000 Standard setting fe Flap operation mode 0001 Draft reduction mode Flap swing lower limit position is shifted upwards 0000 Smudging reduction mode Flap swing upper limit position we is shifted downwards VW Flap swing mode 0001 Normal mode 0002 Draft reduction mode Flap lower limit position is shifted upwards 2 9 3 Detailed Settings Function 2WAY SYSTEM Remote Controller Functions
136. re switch 04 Reverse phase missing phase detected 05 i i DCCT ACCT overcurrent compressor less than 80 Hz P16 Operating and heat 5 ready lamp blinking Compressor 2 constant speed discharge temp trouble P17 altemately Compressor 3 constant speed discharge temp trouble P18 i i Outdoor unit fan trouble P22 xt o xt DCCT ACCT overcurrent 80 Hz or more P26 Start failure caused by compressor wire missing phase DCCT ne P29 failure or similar problem INV compressor start failure Failure of nonvolatile memory IC EEPROM on indoor unit control PCB Operating and timer lamp blinking simultaneously i e Failure of nonvolatile memory IC EEPROM on outdoor unit control PCB Operating and timer H11 lamp blinking simultaneously A O Protective Overload current detected Compressor 2 constant speed device EE Compressor 2 constant speed H21 Lock current detected Compressor 2 constant speed H12 Er e EE No current detected when Compressor 3 constant speed Discharge temp sensor trouble er Connection failure of oil detection sensor Fusing of electromagnetic contact Current detected when compressor was OFF CHECK z Automatic backup operation only blinking No display changes lt lt gt gt alarm indication Does not affect the operation of other indoor units lt gt alarm indication In some cases may affect the operation of other indoor units 7 LT D D 2 0 X 5 5 D 3 D s wo Q D o ae
137. ring with a different refrigerant circuit s indoor unit L11 alarm occurs at the only target indoor unit Probable cause 1 Installation failure of common use solenoid valve kit setting from PC at test run operation and address setting is not made in the same series of all indoor units 2 Wiring shown below that are not allowed Remote control group wiring with a different solenoid valve kit connected to the indoor unit e Solenoid Solenoid Solenoid Solenoid da kit valve kit valve kit valve kit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit indoor unit 7 7 v v x m Yen ate 7 7 7 Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote Remote controller controller controller controller controller controller controller controller controller controller controller lcontroller controlter Remote control group wiring more than one 1 indoor unit with type E1 within only one solenoid valve kit Solenoid Solenoid Solenoid Solenoid valve kit valve kit valve kit valve kit Indoor unit Indoor unit Except Indoor unit Indoor unit Ex
138. rm a v 7 EE l 4 Then press the button Perform steps 1 4 in the same way as for Case 2 Turn the indoor and outdoor unit power ON at all systems 1 To perform automatic address setting in Cooling mode on the outdoor main unit control PCB in the refrigerant system where you wish to set the addresses short circuit the MODE COOL pin CN085 At the same time short circuit the automatic address pin CN054 for 1 second or longer then release it Be sure to perform this process for one system at a time Automatic address settings cannot be performed for more than one system at the same time Communication for automatic address setting begins the compressors turn ON and automatic address setting in Cooling mode begins All indoor units operate To cancel again short circuit the automatic address pin CN054 for 1 second or longer then release it a The LED that indicates automatic address setting is in progress turns OFF and the process is stopped Be sure to perform automatic address setting again Automatic address setting is completed when the compressors stop and LEDs 1 and 2 on the outdoor main unit control PCB turn OFF 1 At the outdoor main unit in the next different system short circuit the automatic address pin CNO54 for 1 second or longer then release it Repeat the same steps to complete automatic address setting for all units Operation from the remo
139. rom the unit In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area for Heat Pump type Systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When performing piping work do not mix air except for specifled refrigerant R410A in refrigeration cycle It causes capacity down and risk of explosion and injury due to high tension inside the refrigerant cycle Refrigerant gas leakage may cause fire Ventilate the room well in the event that is refrigerant gas leaks during the installation Be careful not to allow contact of the refrigerant gas with a flame as this will cause the generation of poisonous gas Keep all tubing ru ns as short as possible Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and un ion tubes before connecting them then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run Do not leak refrigerant while piping work for an installation or re installation and while repairing refrigeration parts Handle liquid refri frostbite When
140. rs are connected Check whether installation of the common use solenoid valve kit from a PC has been made or not Confirmation from the address setting software of a PC Probable cause Reverse phase or missing phase in the R S T phases Check Check the wiring at the power terminal plate Correction Switch the phases and reinsert Check if the result is OK 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis P16 Alarm Alarm code P16 S O Compressor 1 INV overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occur at an inverter frequency of less than 80 Hz after start when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 48 A or higher is detected Probable cause There is a strong possibility of a compressor failure An alarm occurs for current detection trouble when it is judged that no current is flowing after start DCCT is damaged In this case the cause is a DCCT failure Correction It is possible to resolve this trouble by limiting the maximum frequency Example Notes o O P22 Alarm T pe Fan motor trouble Alarm conditions Fan motor start failure fan motor Hall IC input failure Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure Check Check the fan motor wiring the Hall IC wiring and the connector connections If the wiring and
141. s 1 2 3 and 4 D d Cc N a AA EA The change of the colon display between unit Nos 1 20 to unit Nos 21 40 occurs automatically every 10 seconds However the display does not change if there are no higher number units connected To change the display to the higher number units before 10 seconds have passed press the _r te yd FLAP button E An 8 digit display is used for display of the compressor total operating time in 1 hour units e When the first 4 digits are displayed the top dot of the colon is illuminated Figure A e When the last 4 digits are displayed the colon dot is OFF Figure B The display of the first 4 digits and last 4 digits changes automatically after 10 seconds The display can also be changed by pressing the FLAP button B if lt Compressor s total operating time gt A and B are displayed alternately The example here 0000 0062 indicates 62 hours Sample Display A B With the outdoor unit maintenance remote controller when connected to the outdoor unit the unit remote controller check functions will not operate 6 6 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller 1 4 Monitoring Operations Display the indoor unit and outdoor unit sensor temperatures lt Operating procedure gt Press and hold the CHECK and CANCEL buttons simultaneously for 4 seconds or longer to engage temperature
142. s are set set only switch 1 10s digit to ON e If 20 29 systems are set set switch 2 20s digit to ON and set switch 1 10s digit to OFF e If 30 39 systems are set set only switch 3 30s digit to ON For details concerning S004 and S005 refer to Table 2 S006 DIP switch 3P blue Switch for setting the number of outdoor units e Turn the switches ON according to the number of outdoor units 1 4 For details refer to Table 3 S007 DIP switch 3P blue Unit No setting switch e The setting is 1 at the time of shipment For details refer to Table 4 S010 DIP switch 4P blue Backup operation switch If an INV compressor has malfunctioned turn CT1 ON and Back Up SW ON to operate the outdoor unit using only the constant speed compressor If a constant speed compressor has malfunctioned turn CT2 ON and Back Up SW ON to operate the outdoor unit using only the INV compressor Disconnect the wiring from the constant speed compressor 4 3 2WAY SYSTEM PCB Settings 1 Outdoor Unit Control PCB Terminal plug 3P plug black For communications circuit impedance matching CNO72 e A connecting socket 3P black is attached to the terminal plug at the time of shipment from the factory e In the case of link wiring which combines the inter unit control wiring for multiple systems into a single communications circuit leave the connecting socket in place at only one of the outdoor uni
143. s possible that electrical noise is the cause of the trouble Correction 1 Replace the sensor 2 Replace the outdoor unit PCB 3 Correct the problem locations All of the probable causes Notes Operates continuously for a set length of time Indicates 2 5 minutes or longer for an inverter unit and 30 seconds or longer for a constant speed compressor 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis P04 Alarm Alarm code Alarm meaning Alarm conditions Probable cause Replace damaged components and correct the amount of charged refrigerant P05 Alarm Alarm code Reverse phase or missing phase detected Alarm conditions This alarm occurs when a reverse phase or missing phase is detected in the R S T phases High pressure switch activated The operation of the electronic circuit in the high pressure switch may short circuit the terminal depending on the pressure A pressure of 3 3 MPa or above will short circuit the terminal Once the terminal is short circuited it will remain in that state until the pressure goes below 2 6 MPa Failure of the check valve in the compressor discharge tube The service valve is closed Clogging of the outdoor heat exchanger during cooling An air short in the outdoor unit during cooling Failure of the outdoor fan during cooling Clogging of the air filter in the indoor unit during heating An air short in the indoor unit during heating Failure of the indoor fan during hea
144. s setting S002 S003 004 p 7 ON ON ltd SiR ON N UIE No 2 sub unit No 3 sub unit settings settings No of Unit A i outdoor units CC number 8097 is Unit S007 Unit S007 3 units p A J 3 setting B 4 E ee ON oN ele 1 n N i i settin en T oi Epo WEE amp Read EE R 7 Leave the socket that is 7 l 7 Outdoor unit Unit used to short circuit the Unit e Unit system 1 No 1 terminal pl No 2 No 3 Main ermuna pla Sub Sub CNO72 Inter outdoor unit control wiring Inter outdoor unit control wiring Inter unit control wiring rly EE ien Indoorunit 1 1 1 2 1 3 1 13 N a Remote controller Remote communication wiring controller No 2 No 1 main unit settings Refrigerant System address No of indoor units Ni system 2 setting 9 units setting circuit S002 S003 S004 A 9 ER Orr S005 ON on a a a Q No 2 sub unit settings No of ad S007 outdoor AE oy Unit number SOD ow flang unt 2 a units 2 units U 5 i setting unit ial m i 5 No 2 m m 3 setting RD MS No 1 2 S oF 123 oF Outdoor unit Move the socket Unit system 2 to the OPEN side No 2 CNO72 Sub N Inter unit me ar Inter outdoor unit control wiring seed ane Dn Ze ao il To other system Indoor unit 2 1 2 2 2 9 link wiring A i ioli emote controller Remote communication wiring controller Make settings as appropriate for the cases listed below R
145. s temperature sensor trouble at outdoor heat exchanger 1 EXG1 F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 EXL1 F08 Outdoor air temperature sensor trouble F12 Compressor intake temperature sensor trouble F16 High pressure sensor trouble F17 Low pressure sensor trouble F22 Compressor 3 discharge temperature sensor trouble DISCH3 F23 Gas temperature sensor trouble at outdoor heat exchanger 2 EXG2 F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 EXL2 F31 Outdoor unit non volatile memory EEPROM trouble HO3 Compressor 1 CT sensor disconnected or short circuit H05 Compressor 1 discharge temperature sensor disconnected H06 Low pressure trouble H08 Compressor 1 oil detection sensor connection trouble H11 Constant speed compressor 2 overcurrent alarm H12 Constant speed compressor 2 lock current alarm H13 Compressor 2 CT sensor disconnected or short circuit H15 Compressor 2 discharge temperature sensor disconnected H21 Compressor 3 overcurrent alarm H22 Compressor 3 lock current alarm H23 Compressor 3 CT sensor disconnected or short circuit H25 Compressor 3 discharge temperature sensor disconnected H27 Compressor 2 lock current alarm H28 Compressor 3 lock current alarm H31 HIC trouble alarm L04 Outdoor unit address duplication L10 Outdoor unit capacity not set L17 Outdoor unit model mismatch L18 4 way valve operation failure P02 Compressor thermal protector is activated trip only and no alarm P03 Compr
146. sensor into the holder and apply sufficient heat conducting putty 2 If the sensor is malfunctioning replace it Exampe eeN Notes The discharge temperature sensor is generally a sensor intended for accurate detection of high temperatures Therefore it will not accurately detect the temperature if the temperature at the measurement point is 20 C or below 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis HO6 Alarm Alarm code Low pressure switch activated Alarm conditions Probable cause Correction A report occurs during A C operation when the low pressure sensor installed at constant low pressure parts detects a pressure of 0 05 MPa or less continuously for 2 minutes or an instantaneous pressure of 0 02 MPa or less These values represent abnormal low pressure which may damage the compressor However the alarm does not actually occur the first 2 times that the above operation takes place At these times the outdoor unit is stopped and the conditions are monitored The alarm occurs when the above operation occurs for the fifth time The first 4 times before the alarm occurs are called pre trip After pre trip occurs if the low pressure sensor detects a pressure of 0 15 MPa or more for 3 minutes of continuous operation the pre trip count is reset to 0 If the low pressure sensor detects a pressure of 0 16 MPa or less continuously for 30 minutes when the compressor is stopped an alarm occurs immediately no
147. set with switch S004 and S005 on the outdoor unit PCB E20 The outdoor unit received no serial signals from indoor units within 90 seconds after automatic address setting was started 5 2 2WAY SYSTEM Self Diagnostics Function Table 1 Self Diagnostics Function Table Check items E15 E16 E20 Check that the indoor unit power is turned ON O O Check that the inter unit control wiring is connected correctly Check that there are no open circuits short circuits terminal plugs incorrect wiring to the remote controller terminals or O O O similar problems Check that the remote controller wiring is connected correctly Check that there are no open circuits short circuits incorrect wiring to the inter unit control wiring terminals group control crossover wiring or similar problems O O Check that the number of indoor units has been set correctly using switch S004 and S005 on the outdoor unit control PCB Check that the amount of additional refrigerant charge is correct when performing Auto Address Setting Case 3A or Case 3B in the flow chart described on page 1 2 Check that the refrigerant tubing connections are correct when performing Auto Address Setting Case 3A or Case 3B in the flow chart described on page 1 2 Check that there are no problems with indoor unit sensors E1 and E3 when performing Auto Address Setting Case 3A or Case 3B in the flow chart described on page 1 2 Ot
148. ss turns OFF and the process is stopped Be sure to perform automatic address setting again Automatic address setting is completed when LEDs 1 and 2 on the outdoor main unit control PCB turn OFF v Operation from the remote controllers is now possible To perform automatic address setting from the remote controller perform steps 1 to 5 then use the remote controller and complete automatic address setting Refer to Automatic Address Setting from the Remote Controller 1 5 2WAY SYSTEM Address Settings 3 Auto Address Setting Basic wiring diagram Example 2 e If link wiring is used When multiple outdoor main units exist remove the socket that is used to short circuit the terminal plug CN072 from all outdoor main unit No 1 Refrigerant circuit PCBs except for one unit No 1 main outdoor unit settings Alternatively move the sockets to the OPEN side System address No of indoor units system 1 setting 13 unit
149. t is stopped e Condensation or frost is visible up to the top of the accumulator of the stopped outdoor unit e After an outdoor unit stops there is the sound of refrigerant flowing into an outdoor unit that was stopped for a long time e When an outdoor unit starts after being stopped for a long time the start is accompanied by much vibration e Representative parts include the liquid capillaries secondary side of capillaries will be cool during cooling operation mechanical valve mechanical valve bypass check valve sound of refrigerant flow can be heard and stops when the liquid valve is closed hot gas defrost valve if valve secondary side remains hot even after much time has passed be careful not to mistake transmitted heat for a valve failure e Ice is growing on the lower parts of some outdoor unit heat exchangers but not on others yy Because this trouble may occur even in outdoor units with a high operating rate under conditions of insufficient gas caution is needed 6 Sensor failure Check e This alarm is likely to occur when wiring is partially cut It is difficult to identify even when continuity is checked The detected discharge temperature is high e Although such conditions rarely occur a P02 alarm is likely if the detected discharge temperature is low e Replace the sensor with another discharge sensor and compare the temperature conditions 7 If the cause is still unknown after checking the above then it i
150. t or when the connector is not connected to the outdoor unit PCB 2 Crossed wiring or installation error e The discharge temperature sensor of that compressor is connected to the discharge tube of the other compressor e The connector for the discharge temperature sensor of the problem compressor is connected to the outdoor unit PCB connector for the other compressor 3 Outdoor unit PCB failure 4 The check valve on the discharge tube for that compressor is wet 5 An air short blockage in the area around the outdoor unit has increased the outdoor unit ambient temperature reducing the cooling effects after the compressor stops 6 There is a cause that results in P03 P17 or PO2 alarm 7 Electrical noise 1 Sensor malfunction and outdoor unit PCB failure Trouble e Constantly indicates a high temperature e When monitoring software or other means are used for monitoring the discharge temperature at times fluctuates suddenly and wildly e In some cases the precise temperature may not be known even when monitoring software is used e Wiggle the sensor and check whether the trouble continues e Check whether the connector is partially disconnected from the PCB yy An F04 alarm will not result if the connector is completely disconnected circuit is open e If the cause is still uncertain check the following to determine whether a sensor or PCB failure has occurred Step 1 Connect the other compressor discharge sensor or a discharge sens
151. te controllers is now possible Automatic address setting in Cooling mode cannot be done from the remote controller same time Press and hold for 4 seconds or longer TNN COPY S EN a Check that the item code is A1 l automatic address setting 2 Automatic address setting for one refrigerant system begins When automatic address setting for one system is completed the system returns to normal stopped status sApproximately 4 5 minutes is required gt During automatic address setting amily is displayed on the remote controller This message disappears when automatic address setting is completed 5 Repeat the same steps to perform automatic address setting for each successive system 1 9 2WAY SYSTEM Address Settings 3 Auto Address Setting Display during automatic address setting On ed main unit PCB LED 2 Do not short circuit the automatic address setting pin CN054 again while automatic address d0 i setting is in progress Doing so will cancel the setting operation and will cause LEDs 1 and 2 to Blink n ee VEE When automatic address setting has been successfully completed both LEDs 1 and 2 turn OFF LED 1 is D023 LED 2 is D024 If automatic address setting is not completed successfully refer to the table below and correct the problem Then perform automatic address s
152. the connector pin TP3 2P yellow on the indoor unit control PCB White Yellow Red HEE TP6 TP3 TP1 i coc oP CD oan EA HEHE o Fig 2 6 2 12 4 Remote Controller Servicing Functions List of Servicing Functions 2WAY SYSTEM Remote Controller Functions Servicing check display Alarm history display Press and hold the A and buttons for 4 seconds or longer Simple settings Filter lifetime operating mode priority central control address and other settings Press and hold the and E buttons for 4 seconds or longer Detailed settings System address indoor unit address central control address and other settings Press and hold the 4 and GET buttons for 4 seconds or longer Press the button Function Description Button operations Reset operation Unit status Test a T at Press and hold the A button EL pa ON for 4 seconds or longer Ed i hen h Press and hold the A and Current operation is el ek Vo AE buttons for 4 seconds or longer maintained display sensor When settings are made from a remote controller the indoor unit where that remote controller is connected stops Automatic address Automatic address setting based on command from the wired remote controller Press and hold the and the timer operation gt buttons for 4 seconds or longer Automatic reset Address change Change of indoor unit
153. ting Clogging of the refrigerant circuit 10 Failure of the mechanical valve 11 Failure of the solenoid valve kit 12 Too much refrigerant has been charged 13 Failure of the high pressure switch 14 The wiring from the solenoid valve kit is actually connected to the different indoor unit 15 The system is that the multiple indoor units are connected at only one solenoid valve kit and also multiple remote controllers are connected Installation of the common use solenoid valve kit from a PC has not been made Make sure that the high pressure switch connector has been properly connected If the high pressure switch is properly connected connect a high pressure gauge to the high pressure outlet port and monitor the pressure during operation to check the pressure when the high pressure switch is activated Check valve failure is likely if the pressure is less than 3 3 MPa The following describes checks to be made when the pressure is high During cooling check whether the outdoor unit heat exchanger is clogged Remove any foreign material that prevents ventilation During cooling check whether an air short blockage has occurred in the outdoor unit The system is operating normally unless the temperature around the outdoor unit is excessively high During cooling check for outdoor fan failure Check whether the screws securing the fan are loose and whether the fan connector in the outdoor unit PCB is properly connected During he
154. tion as an ordinary remote controller It is therefore only used for test runs and during servicing System Diagram Outdoor unit maintenance remote controller Outdoor unit Inter unit control wiring Special service checker wiring Servicing No CV6231785082 f Outdoor unit control PCB Indoor unit Indoor unit Remote Remote controller controller e The special service checker wiring is required in order to connect the outdoor unit maintenance remote con troller to the outdoor unit PCB e Ordinary remote controllers or other controllers are still required for the indoor units even when the outdoor unit maintenance remote controller is connected 1 2 Functions m Functions on the ordinary display 1 Press the buttons to execute the following functions e All indoor units stop start e Cooling heating change e All indoor units test run 2 Display The following displays are possible e Alarm display e No of indoor outdoor units e Unit Nos of connected indoor outdoor units e Operating status of indoor outdoor units Blinks when alarm occurs e Indoor thermostat ON e Display of individual outdoor unit alarms e Total operating time of outdoor unit compressors e Oil level of the outdoor unit oil sensor e Total outdoor unit power ON time e Outdoor unit microcomp
155. troller monitor or PC monitor to check the temperature that is recognized by the microcomputer F12 Alarm Alarm meaning Compressor intake temperature sensor trouble 1 A D step is 10 steps or less short circuit 2 A D step is 1014 steps or more open circuit 1 Sensor malfunction including connector 2 PCB malfunction Check 1 Measure the sensor resistance Check that the sensor is operating normally 2 Use a remote controller monitor or PC monitor to check the temperature that is recognized by the microcomputer 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis F16 Alarm Alarm meaning High pressure sensor trouble abnormal rise in high pressure In some cases this may not be the result of a high pressure sensor malfunction Alarm conditions e High pressure SW activated although the detected pressure was lower 3 03 MPa or below than the high pressure SW activation pressure Undershift e High pressure SW failed to activate although the detected pressure was higher 3 43 MPa or above than the high pressure SW activation pressure Overshift e The saturation temperature at the detected pressure is 5 C or more below the highest indoor unit E1 temperature continuously for 30 minutes e High pressure sensor disconnected or open circuit Probable cause 1 High pressure sensor malfunction 2 Failure to connect the connector to the outdoor unit PCB 3 Failure to open the service valve 4 Clogged tubing
156. ts and move the socket from the SHORT side to the OPEN side at all other outdoor units If multiple connecting sockets are left in place communications trouble will occur LED1 2 LED red x 2 D023 D024 e LED 1 and 2 blink alternately while automatic address setting is in progress e Display the alarm contents for alarms which were detected by the outdoor unit Power LED LED red Power indicator D515 Indicates the DC 5V power on the outdoor unit control PCB pn 2P plug white Start pin 52 Short circuit this pin and apply a pulse signal to start all indoor units in that refrigerant system Stop 2P plug white Stop pin ENG Short circuit this pin and apply a pulse signal to stop all indoor units in that refrigerant system AP 2P plug white Vacuuming pin CNO50 e To perform vacuuming of the outdoor unit short circuit this pin and then turn the power ON All solenoid valves turn ON and vacuuming begins smoothly Do not perform automatic address setting at this time e Release the short circuit to return the unit to normal status Mode 3P plug white Indoor unit Heating Cooling mode change pin CN085 e When operating the compressors to perform automatic address setting operation in Heating mode can be normally used However short circuiting this pin performs operation in Cooling mode Static signal e Short circuiting this pin on COOL side during ordinary operation changes the mode to
157. tting mode screen check the value for the outdoor unit capacity item code 81 Check that it is not set to O or to a capacity that is not allowed Correction If item code 81 is incorrect use the outdoor unit maintenance remote controller and set it correctly a After changing the setting be sure to reset both the indoor and outdoor power Bampe Je Notes The outdoor unit maintenance remote controller is required in order to set the capacity in the outdoor unit EEPROM L17 Alarm Outdoor unit model mismatch Alarm conditions This alarm occurs when a unit other than a R410A refrigerant model is connected Probable cause 1 A unit that uses R407C refrigerant or a R22 model unit was connected by mistake 2 The connected unit is correct however the refrigerant type setting in the outdoor unit EEPROM item code 80 is incorrect Check 1 Check the refrigerant type at the connected unit 2 Use the outdoor unit maintenance remote controller and check the item code 80 refrigerant type If the setting is incorrect change it to R410A Goten Bampe Notes The outdoor unit maintenance remote controller is required in order to set the refrigerant type in the outdoor unit EEPROM L18 Alarm Alarm meaning 4 way valve operation failure Alarm conditions During heating operation Comp ON the highest detected temperature at an outdoor unit heat exchanger EXG 1 EXG 2 EXL 1 or EXL 2 was 20 C or more above the outdoor ai
158. ture sensor disconnected H27 Compressor 2 oil detection sensor connection trouble 3 18 H28 Compressor 3 oil detection sensor connection trouble 3 18 H31 HIC trouble alarm 3 19 L04 3 5 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes Compressor thermal protector is activated trip only and no alarm Compressor 1 discharge temperature trouble High pressure switch activated Reverse phase or missing phase detected 3 22 O2 sensor differential alarm Only when optional O2 sensor supplied Compressor 1 INV overcurrent alarm Compressor 3 discharge temperature trouble High load alarm Fan motor trouble Inverter compressor missing phase or lock alarm Compressor 2 discharge temperature trouble Blinking Inspection Display on the remote CHECK blinking 1 controller CHECK blinking 2 2WAY SYSTEM Trouble Diagnosis 3 2WAY Alarm Codes E06 Alarm Alarm code E06 Alarm meaning Outdoor unit failed to receive serial communication signals from indoor unit Alarm conditions Outdoor unit failed to receive serial communication signals from indoor unit Probable cause 1 The indoor unit power was cut OFF after initial communications were completed 2 An open circuit or short circuit occurred in the inter unit control wiring after initial communications were completed Check Check the power at the indoor and outdoor units and check the inter unit control wiring CE ls EE EE TE Example Notes T
159. ture that is recognized by the microcomputer Correction Example F31 Alarm EE EE Outdoor unit non volatile memory EEPROM trouble Alarm conditions 1 Non volatile memory is not present when power initialization occurs 2 Read values do not match after writing to non volatile memory is complete Probable cause 1 Memory was not inserted after the PCB was replaced 2 The lifetime of the non volatile memory has been reached 3 Non volatile memory is installed incorrectly wrong direction bent pins etc Check Correction S SO Example J oo SOS Notes l S O 3 WAY SYSTEM 4 3 WAY Alarm Codes Trouble Diagnosis H11 H12 H21 H22 Alarm Alarm code Alarm meaning Alarm conditions H11 Constant speed compressor 2 overcurrent alarm H12 Constant speed compressor 2 lock current alarm H21 Constant speed compressor 3 overcurrent alarm H22 Constant speed compressor 3 lock current alarm Hx1 During operation the compressor current value exceeded 20 A for 30 seconds or longer However this alarm is not detected for 4 seconds after the compressor starts Hx2 During operation the compressor current value exceeded 29 A for 4 seconds or longer However this alarm is not detected for 2 seconds after the compressor starts Probable cause Correction 1 Compressor failure locked or partially locked 2 CT circuit failure including cut wiring 3 Missing power phase 4 Low power voltage
160. ultaneously for 4 seconds or longer Gaga unit No or AL i in the case of group control item code and settings data FT XX are displayed blinking on the remote controller LCD display Fig 2 2 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operat ing If group control is in effect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating Press the temperature setting Ca CYD buttons to select the item code to change Press the timer time 4 2 buttons to select the desired setting data For item codes and setting data refer to the following page Press the button The display stops blinking and remains lit and setting is completed Press the button to return to normal remote controller display 2WAY SYSTEM Remote Controller Functions biti XX 3 Detailed Settings Function e Setting the Flap Separately When setting the CZ RTC2 1 The 4 air outlet flap can be adjusted separately during operation When not adjusted separately all flaps operate in the same manner Air discharge Flap adjustment for up down airflow direction lt Procedure gt Stop the system before performing these steps Press and hold the A and buttons simulta
161. unter is cleared if the compressor operates continuously for a specified length of time Probable cause 1 Clogging of liquid valve capillaries 2 Insufficient amount of refrigerant including trouble resulting from an insufficient initial charge and from gas leakage Blocking of low pressure parts caused by intrusion of foreign objects moisture scale etc Crossing tubing or PCB connectors with the other compressor thermistor Expansion valve operation failure Accumulation of refrigerant at stopped outdoor units Compressor discharge sensor failure PCB failure A D conversion failure Electrical noise Clogging of capillaries Trouble Compressor discharge temperature does not decrease even when the liquid valve is ON Check When the liquid valve is operating and the liquid valve is ON check that the secondary side of the liquid capillaries is cold 2 Insufficient refrigerant Trouble Liquid effectiveness is poor Check Check whether or not the superheating temperature is declining if the evaporator mechanical valve is opened to 300 pulses or more after checking for foreign object intrusion 3 Foreign object intrusion Trouble Liquid valve effectiveness is poor Check Check that there is no difference in the condensation or frost conditions between the strainer primary side and secondary side tubing 4 Crossed thermistor Trouble The discharge temperature of the other compressor is high although on
162. use Check and 1 System configuration Correction 1 1 Is an O2 sensor being used If Yes see 3 1 If No see 2 1 2 Indoor EEPROM setting 2 1 Is the EEPROM setting item code OB on the indoor control board set to 0001 If Yes see 3 1 after modification If No see 4 1 3 EXCT wiring 3 1 Is the EXCT socket wire shorted If Yes Modify the wiring If No see 4 1 4 Indoor control board 4 1 Is the alarm triggered if the EXCT socket wire is disconnected and the power is reset If Yes see 4 3 If No see 4 2 4 2 Since there is no error see what happens 4 3 Indoor control board defective replace board Example fm Notes o O P16 Alarm Compressor 1 INV overcurrent alarm Alarm conditions This alarm occurs when current trouble or current detection trouble occur when trouble judgment current is detected in the primary or secondary current or when an instantaneous secondary current of 18A or higher is detected Changed to output error by current regardless of the inverter frequency In addition there are 6 horsepower and 10 horsepower compressors 1 When more than the over current values shown in the table were detected in the primary and secondary current Primary Secondary 6 horsepower compressors 18A 18A 10 horsepower compressors 21A 21A When more than the current values shown in the table are
163. uter version other information 6 2 2WAY SYSTEM Service Checker 1 Outdoor Unit Maintenance Remote Controller m Temperature monitor Displays the temperature from each indoor outdoor sensor m Outdoor unit alarm history monitor Displays the outdoor unit alarm history E Setting the outdoor unit EEPROM data Settings mode 1 and settings mode 2 can be used to make outdoor unit EEPROM data settings 1 3 Ordinary Display Controls and Functions m Functions on the ordinary display Connect the special service checker wiring to the outdoor unit PCB The connection diagram is shown below Ms e If the inter unit control wiring is connected it can be left as is e In case of an independent outdoor unit 1 maintenance remote controller connected to 1 outdoor unit automatic address setting for indoor units not completed both setting mode 1 and set ting mode 2 can be used for outdoor unit EEPROM data settings e The overall system status for that refrigerant system is displayed Outdoor unit PCB OS RC 3P blue PCB connector 8P blue Special service checker wiring n Relay connector 2P white Outdoor unit maintenance remote controller TIMER All units start stop Fig 6 1 lt Operation gt The 0 indoor units e The LED illuminates if any indoor unit is operating e The LED blinks if an alarm occurs at any of the operating indoor units
164. ve kit Mismatch of outdoor unit type Duplication of outdoor R C address setting Operating and heating L04 ready lamps blinking simultaneously Capacity code of outdoor unit is not set i i Indoor unit Indoor coil temp sensor E1 Operating and Indoor coil temp sensor E3 sa blinking Indoor suction air room temp sensor xX xX Indoor discharge air temp sensor Continued 1 Contents of Remote Controller 3 WAY SYSTEM Switch Alarm Display Trouble Diagnosis ON O Blinking XY OFF Wired 7 Wireless remote remote controller control 3 A B receiver display display Possible cause of malfunction Standby for heating Operation Thermistor fault Outdoor unit Compressor 1 INV discharge temp sensor FO4 Compressor 2 constant speed discharge temp sensor F05 Compressor 3 constant speed discharge temp sensor F22 FIG xy ig Low pressure sensor F17 Heat exchanger 2 liquid temp sensor F24 Heat exchanger 2 gas temp sensor F23 Heat exchanger 3 liquid temp sensor F26 F25 Ceiling panel connection failure lt lt P09 gt gt Timer and ioe Protective Indoor unit Thermal protector in indoor unit fan motor is activated lt lt P01 gt gt ready lamp blinking device loat switch is activated lt lt P10 gt gt altemately Fan inverter protection function activated lt lt P12 gt gt xt xt Oxygen O gas sensor activated P14 Outdoor unit Compressor 1 INV discharge temp trouble P03 High pressu
165. when seizing of the compressor magnet SW is detected Because this may also be the case refer to Blinking inspection display compressor magnet SW seizing detection Alarm conditions When alarm P16 P22 P26 P29 Hx1 Hx2 or H31 has occurred correcting the control device remote controller etc input engages this mode Probable cause Because alarm P16 P22 P26 P29 Hx1 Hx2 or H31 has occurred check the alarm history then refer to the corresponding items Follow the instructions in the corresponding items to correct the trouble Recovery After repairing the malfunctioning locations reset the power for the system all outdoor units Caution Automatic backup mode will not be canceled until the power is reset Notes Automatic backup mode is not engaged in cases of alarms other than those listed above Reasons e There is no need for automatic backup if recovery is possible by correcting the remote controller input e With alarms for which automatic recovery is possible such as sensor alarms the presence of electrical noise may result in a new alarm However it is believed that this occurs for a comparatively short time only In these cases a mode automatic backup mode that limits operation may be engaged e Control is not possible when a communications system alarm has occurred Automatic backup mode is not engaged in order to avoid causing secondary damage Dae f 3 WAY SYSTEM 5 Blinking Inspection Display Trou

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