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Room Air Conditioner SVC MANUAL(General)

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1. H Description Indoor Unit Outdoor Unit LED2 LED1 Red Green 21 DC Peak IPM Fault 2 Times 1 Time 2 Times 1 Time 22 CT 2 Max CT 2 Times 2 Times 2 Times 2 Times 23 DC Link Low Volt 2 Times 3 Times 2 Times 3 Times 25 Low wire volt high wire volt 2 Times 5 Times 2 Times 5 Times 26 DC Comp Position Error 2 Times 6 Times 2 Times 6 Times 27 PSC Fault Error 2 Times 7 Times 2 Times 7 Times 29 Inverter Compressor over current 2 Times 9 Times 2 Times 9 Times 31 CT error low current 3 Times 1 Time 3 Times 1 Time 32 D Pipe High INV 3 Times 2 Times 3 Times 2 Times 37 Failure Compression Ratio 3 Times 7 Times 3 Times 7 Times 40 CT Sensor Open Short 4 Times 4 Times 41 INV D Pipe Th Error Open Short 4 Times 1 Time 4 Times 1 Time 44 Outdoor Air Th Error Open Short 4 Times 4 Times 4 Times 4 Times 45 Cond Middle Pipe Error Open Short 4 Times 5 Times 4 Times 5 Times 48 Cond Out Pipe Error Open Short 4 Times 8 Tiems 4 Times 8 Tiems 53 Communication Failure Outdoor Unit lt gt Indoor Unit 5 Times 3 Times 5 Times 3 Times 60 EEPROM Check Sum Error 6 Times 6 Times 61 Cond Pipe High 6 Times 1 Time 6 Times 1 Time 62 Heatsink High 6 Times 2 Times 6 Times 2 Times 63 Cond Pipe Low 6 Times 3 Times 6 Times 3 Times 65 Heatsink Th Error Open Short 6 Times 5 Times 6 Times 5 Times 67 Outdoor BLDC Fan Lock 6 Times 7 Times 6 Times 7 Times 72 Failure 4Way 7 Times 2 Times 7 Ti
2. Are the PCB Measure resistance between temperature sensing PCB temperature sensor pin N parts normal gt 10K045 25 C basis Heatsink temperature s ensor Remedy reassemble the screw ON Heatsink White 2Pin Connector 70 Part 4 Trouble Shooting 13 CH67 Outdoor BLDC Fan Lock Error Error Code Error Detection Cause of Error Check Point Outdoor BLDC Fan Lock The outdoor unit PCB Fan connector displaced BLDC Fan operation BLDC Fan motor burned wire F Back signal does disconnected not come on PCB BLDC Fan operation circuit burned Check for the status of outdoor fan assembly e Check for the status of the PCB Fan connector assembly Check Fan motor wire disconnection e Check if Fan motor burned CH67 Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check the status of fan locking out off Inspecting Outdoor BLDC Fan Motor burn lace 1 Set Multi tester as Diode voltage i We peny N Check operational difficulties by measurement mode foreign subjects 2 Measure voltage between Fan motor connector pin 1 and pin 4 at power off state 3 Measured voltage value of 1V 0 2V means the motor is internally burned Remedy remove cause of error
3. d Operate Cooling Mode by setting the desired temperature of the remote controller is less than one of the Indoor temperature by 1 at least a When in air circulation mode compressor outdoor fan is stopped d Check the sensor for Indoor temperature is attached as close as to be effected by the tem perature of Heat Exchange EVA d When displaying Error code refer to the trouble shooting guide s Check the main power source AC 208V 230V Check the trouble shooting guide error code 21 26 Check that CN FAN A B supplied voltage to outdoor PCB is about AC 208V 230V Check that whether the housings and harnesses would be separated when there are attempts to disconnect those Check to pull with hands directly to the harness No harness should be divided from the housing Turn off main power d Check the electrical wiring diagram of Outdoor side Check the open or short of connecting wires between Indoor and Outdoor 30 Part 4 Trouble Shooting Trouble 4 When indoor Fan does not operate Turn off main power d Check the connection of CN FAN d Check the Fan Motor a Check the Fuse AC250V T2A d Check the related circuit of indoor Fan Motor The pin No 3 of micom and the part for driving SSR Q01M e Check the related pattern Check the SS
4. Is the PCB Check the status of PCB Fan fan connector assembled connector assembly CN MOTOR1 amp properly MOTOR2 D DD DDD 0 FAN MOTOR CONNETOR Remedy reassemble the connector Check the status of Fan motor wire disconnection Check the status of the Fan motor Is the Fan Motor normal middle connection connectors Check if Fan motor is burned gt measure voltage between Motor connector pins Remedy replace Fan motor Remedy replace PCB Assembly 3714 FRIEDRICH LIN Friedrich Air Conditioning Co 10001 Reunion Place Suite 500 San Antonio TX 78216 877 599 5665 www friedrich com P No MFL41161608
5. Check the sensor assembly status KI Check if the sensor is burned measure j resistance gt 5K0 10 25 C basis 69 Part 4 Trouble Shooting 12 CH62 Heat Sink Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan Check outdoor fan constraint screened flow High temperature in constraint screened blocked structure CH62 outdoor PCB Heat Poor PCB Heat Sink assembly Check for the status of the PCB Heat sink Sink Poor PCB temperature sensing circuit connection parts Check PCB temperature sensing parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB temperature sensing part ls the unit Check fan locking 1 Set Multi tester as resistance Remove blockings around heat measurement mode properly installed exchanger Hit id 2 Measure resistance between Heatsink e Maintain distance between temperature sensor pin outdoor unit and the wall fi o Check pipe folding and 3 Measured resistance value of 10KN 5 abnormality 25 C basis Check service valve lock Remedy remove cause of error
6. CH40 CT Sensor Error Open Short Error Code Error Detection Cause of Error Check Point AC Input current Comp phase current PCB sensing circuit part Check power input connector Comp output sensing circuit basic burned current sensing circui voltage sensing error CH40 Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check voltage measurement Is AC input on the input current Fig 1 current sensing part at the power on standby normal state DC OV 0 2V DC voltage measurement Is the Comp at the measurement point in phase Current sensor figure 2 at power on Input Cur part normal standby state gt measured rent value within 2 5V 0 2V Fig 1 Comp curr ent GND NET LA RE IN ge N n Ti C SIG PT alli A g Fig 2 65 Part 4 Trouble Shooting 8 CH41 44 45 65 Inv D Pipe Outdoor Inlet Cond Pipe Heat sink Sensor Error Error Code Error Detection Cause of Error Check Point Inv D Pipe sensor CHA open short CH44 Outdoor Inlet sensor Sensor displacement poor open short assembly Check the status of sensor assembly CH45 Cond Pipe sensor Sensor burned disconnection Check if sensor is burned open short insula
7. INV Comp High lt Low Freguency High p Low Comp OFF f Operating frequency of compressor depends on the load condition like the difference between the room temp and the set temp frequency restrictions If the compressor operates at some frequency the operating frequency of compressor cannot be changed within 90 seconds not emergency conditions Compressor turned off when Intake air temperature reaches below 0 5 C 1 F of the setting temperature for three minute continuously Intake air temperature reaches below 1 5 C 3 F of the setting temperature Compressors 3 minute time delay After compressor off the compressor can restart minimum 3 minute later 2 2 Heating Mode Thermo OFF 2 C 3 6 F Thermo ON Setting Temp INV Comp Frequency High Low Comp OFF High Low Comp OFF Operating frequency of compressor depend on the load condition The difference between the room temp and set temp frequency restrictions If compressor operates at some frequency the operating frequency of compressor cannot be changed within 90 sec onds Condition of compressor turned off When intake air temperature reaches 4 C F above the setting temperature Condition of compressor turned on When intake air temperature reaches below 2 C 3 6 F of above the setting temperature Condition of indoor fan turned off While in defrost control the
8. reconnect connectors replace PCB Assembly 53 Part 4 Trouble Shooting 11 CH60 Outdoor Unit PCB EEPROM Error Error Code Error Detection Cause of Error Check Point Incorrect checksum of Outdoor unit POB CH60 outdoor unit PCB EEPROM misapplied EEPROM assembly EEPROM e Outdoor unit PCB EEPROM poor assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if EEPROM is missing Is the EEPROM properly Check the status of the EEPROM assembled assembly Remedy reassemble EEPROM Replace PCB Assembly Inspecting Outdoor EEPROM Assembly Status 1 Check the consistency of the EEPROM s direction inserted in the socket and the EEPROM marking 2 Check if the EEPROM is securely inserted in the socket poor connection 3 Check if the EEPROM Lead Pin is missing in the socket EEPROM Check Method 54 Part 4 Trouble Shooting 12 CH61 Cond Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Fan constraint screened blocked Check fan constraint screened flow Heat exchanger contaminated structure High temperature in l f CH61 Cond Pipe EEV connector displaced poor EEV Checkifrefrigerant overc
9. the parts are decided as burned Check service valve lock Is the unit properly installed Comp current Remedy remove cause of error GND L LIA INS N Yes si N ng n N Sare a PER TES A i bi Ic K KN Mt nia PS N s 119 Check compressor locking Check compressor wire Is the compressor normal disconnection open negative phase Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Yes SH Check phase current sensing part i voltage measurements at Power phase current sensing circuit 5 on standby state U V W gt DC part normal DEV 0 2V Remedy replace PCB Assembly 63 Part 4 Trouble Shooting 6 CH32 Inverter Compressor D Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint screened blocked Check outdoor fan constraint screened flow High temperature in Refrigerant leakage structure Discharge pipe of the insufficient Check refrigerant leakage inverter compressor Poor INV Comp Discharge Check if the sensor is normal sensor Check the status of EEV assembly LEV connector displaced poor LEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking
10. 2 Transferring clockwise counter clockwise connected manifold gauge Evacuation Open Open Open 3 Servicing with charging cylinder Gas charging Open Open Open 4 Servicing with charging cylinder Pressure check N Open 5 Servicing Open Open with charging cylinder Gas releasing Open 6 Servicing Open Open with charging cylinder 21 Part 4 Trouble Shooting 2 Pumping Down EN Gas side Purge the air Outdoor unit e Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position Remove the valve stem caps and confirm that the valve stems are in the raised position Be sure to use a hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 Stop operation and wait for 3 minutes then connect the charge set to the service port of the 3 way valve Connect the charge hose with the push pin to the service port 4 Air purging of the charge hose Open the low pressure valve on the charge set slightly to air purge from the charge hose 5 Set the 2 way valve to the closed position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm g 7 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up indi cating 3 to 5kg cm g 8 Disconnect the charge set and mount the 2 way
11. N EKEN ER N ka Ri kia En we ge be be NN Eed WEN KERN 10 3 Sp cial Mode Controls an 12 4 Utility Funelions anna 13 Part 2 Functions amp Controls 1 List of Functions amp Contre Category Function Description Remark Cooling Mode Cooling operation A Heating Mode Heating operation Basic mode Tr controls Healthy Dehumidification Dry operation Auto Changeover Cooling mode is automatically changed to heating mode and vice versa Jet Cool Powerful cooling mode Special Mode Jet Heat Powerful heating mode controls Energy saving Air volume amp set temp are automatically selected for saving energy in cooling mode Utility Functions Forced operation Operation without remote controller Auto Clean After cooling operation this function makes the evaporator dry Air volume control Indoor Fan speed Control Natural Air control Air volume control Program Auto Swing Vertical Airflow Direction control Sleep mode Auto control Air volume amp set temp are automatically changed for com fortable sleep Auto Restart Function When power returns after a power failure Unit restarts in the previous operating mode NOTE The Exploded View SVC Manual has the particular Function table for each model Part 2 Functions amp Controls 2 Basic Mode Controls 2 1 Cooling Mode 0 5C 1F Thermo ON Setting Temp 0 5C 1F Thermo OFF
12. Outdoor fan constraint Check outdoor fan constraint screened flow CH29 Se phase current is high screened blocked structure Burned PCB phase Check for PCB phase current sensor part current sensor part Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB phase current sensing circuit Check fan locking 1 Set Multi tester as DC voltage measurement Remove blockings around heat mode Engel 2 Measure at the bel ing point DC Maintain distance between EE EP outdoor unit and the wall voltages at Power on standby state Check pipe folding and 3 If the measurements are outside DC 2 5V abnormality 0 2V the parts are decided as burned Check service valve lock Is the unit properly installed Remedy remove cause of error Check compressor locking Check compressor wire Is the compressor normal disconnection open negative phase Check inside insulation damage Tester Remedy Rearrange compressor wire disconnections Replace compressor Yes is the PCB Check phase current sensing part AA voltage measurements at Power phas
13. compressor constraint Disconnection short eres Check compressor wire open short f l circuit inside compressor High current into the Check compressor insulation damage CH21 Over load operation compressor a Check outdoor fan constraint screened flow Outdoor fan constraint screened blocked ouer Burned parts inside PCB SRI SNT Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Check Fan constraint Check for short circuit of PCB IPM Remove blockings around heat exchanger Input Signal Connector Is the unit installed Maintain distance between outdoor unit 1 Set as the multi tester resistance properly and the wall measurement mode km Hartie KIN 2 Check the short circuit between the input signal pins at the IPM SPM3 lower parts in Power off state Remedy remove the cause of error Check compressor constraint Check compressor wire disconnection Is the Compressor open negative phase Normal Check inside wire open short Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Yes Check PCB compresso
14. e ee MA l 32 a Indoor Unit Error een een 32 a Outdoor Unit ER ON its ok a ai ka ki kak anka ik ken dako ate ana 34 Trouble Shooting Guide Indoor Unit esse ee mannna nananana maana ana ER KG Ge AE 36 Trouble Shooting Guide Outdoor Unit 2 LED Type sees esse nta ER ene 41 Trouble Shooting Guide Outdoor Unit 1 LED Type esse esse see RE ene 56 Part 1 General Information 1u Salely Precautions so EG N NANA N ee in 2 Nomenclature Re ET EE OR amma naan EE VEE Part 1 General Information 1 Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed E Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is classified by the follow ing indications A WARNING This symbol indicates the possibility of death or serious injury A CAUTION This symbol indicates the possibility of injury or damage to properties only m Meanings of symbols used in this manual are as shown below O Be sure not to do Be sure to follow the instruction A Dangerous Voltage 1 1 Cautions in Repair AWARNING Be sure to disconnect the power cable plug from the plug socket before disas sembling the equipment for a repair Internal components and circuit boards are at main potential when the equipment is connected to the power cables This high voltage is extremely dan
15. indoor and outdoor fans are turned off Compressor 3 minute delay After compressor off the compressor can restart minimum 3 minute later 10 Part 2 Functions amp Controls 2 3 Healthy Dehumidification operation When the dehumidification operation is set by the remote controller the intake air temperature is detected and the set ting temp is automatically set according to the intake air temperature Intake air Temp Setting Temp 26 C 78 8 F s intake air temp 25 C 77 F 24 C 75 2 F lt intake air temp lt 26 C 78 8 F intake air temp 1 C 2 F 22 C 71 6 F s intake air temp lt 24 C 75 2 F intake air temp 0 5 C 1 F 18 C 64 4 F lt intake air temp lt 22 C 71 6 F intake air temp intake air temp lt 18 C 64 4 F 18 C 64 4 F When intake air temp is 1 C 2 F above the setting temp condition of compressor is same as in cooling mode operation When intake air temperature reaches 1 C 2 F below the setting temp compressor operates in step1 step3 and the indoor fan speed again operates at low speed or comes to a stop 2 4 Auto changeover operation The air conditioner changes the operation mode automatically to keep indoor temperature steady When room temperature vary over 2 C 4 F with respect to setting temperature air conditioner keeps the room tem perature in 2 C 4 F with respect to setting temperature by changing the m
16. parts Inspecting PCB DC Link voltage sensing Check if the input voltage is circuit within AC 190 260 V Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state 3 If the measurements are outside DC 2 4 2 8V the parts are decided as burned Is the input voltage normal Remedy inspect repair power board Yes Measure DC Link voltage at Is the PCB Power Power on standby state part normal DC 280 310V Remedy replace PCB Assembly If measurement of DC Link l voltage at Power on PCBDC gu ere standby state is DC 280 nta par norma 310V and DC Link sensed voltage DC 2 4 2 8V Remedy replace PCB Assembly 61 Part 4 Trouble Shooting 4 CH26 DC Comp Location Sensing Error Error Code Error Detection Cause of Error Check Point Compressor Locking Overload operation Check compressor locking Over current at the R Pa Outdoor fan constraint Compressor wire open short initial operation of the a A compressor location screened blocked Check compressor insulation damage CH26 ate Burned parts inside e Check outdoor fan constraint screened flow sensing signal for compressor operation PERE dade i a Burned PCB phase Check if IMP burned refer to CH21 p current sensing circuit Check on PCB current sensing circuit parts parts Before checkin
17. 22 Chang won R410A Tianjin R410A CT 2 Product Type A Z 3 Cooling Heating Inverter A Z Split Type Air Conditioner Cooling Only Heat Pump C O E Heater H P E Heater AC Inverter C O AC Inverter H P Q DC Inverter C O W DC Inverter H P 4 5 Capacity 0 9 Cooling Heating Capacity Ex 09 9 000 Btu h 6 Electric Range 1 9 1 115V 60Hz A Z 2 220V 60Hz 3 208 230V 60Hz 5 200 220V 50Hz 6 220 240V 50Hz 7 110V 50 60Hz ZENXTO Q 7 Chassis A Z Name of Chassis 8 Look A Z Look Color Artcool Model 9 Function A Z Basic Basic 4Way Basic Deodorizing Filter Carbon filter Plasma A changeove A clean 2Way lon Plasma A changeove A clean 4way lon Lamp Plasma A changeove A clean Low A Plasma A changeove A clean 4way Low A Plasma A changeove A clean Plasma A changeove A clean 4way Plasma A changeove A clean PTC Plasma A changeove Autoclean 4way PTC Plasma A changeove A clean 4way Low A PTC Smart Robot Cleaning Eco eye Plasma Allergy Filter 4way Plasma Allergy Filter 4way Allergy Filter 4way Allergy Filter 2way Basic Low Ambient Basic A clean 4way Low A NI lt ISI lt iC HDO DV ZETTE nn mo wie 10 Serial No 1 9 Model Development Serial No NK JA Part 2 Functions amp Controls 1 List of Controls amp Functions Jose RM n kkka m ie 9 2 Basic Mode Control ss se kak ik kan ka
18. 4 FRIEDRICH 1883 Room Air Conditioner SVC MANUAL General DUCTLESS SPLIT SYSTEMS CAUTION Before Servicing the unit read the safety precautions in General SVC manual Only for authorized service personnel THE EXPERTS IN ROOM AIR CONDITIONING 960 914 06 Air Conditioner Service Manual CONTENTS Part1 General Information 1 Safety Precaution S os do AA ie NG Km jp 4 2 Nomenclature esse eek nunna muunna RE RR RR GER ee RR ee KAR ee RR Re nananana auma LLANA NANANA 7 Part 2 Functions amp Controls ELISE Of Functions amp e en 9 2 Basic Mode Controls ana ee 10 a Speelal Mode C OMIKOIS naaa ANAKAN ANAKAN 12 A Utility Function anne 13 Part3 Test Run 1 Check before Test RUN ese ee sss ennenen enaa ee ER venen RR ER ennan 17 2 Test Run Flow chart es ee sss esse sse naa na aan aan ana ER RR LAAL NA 18 3 Test Run Detail EE RE EE DE 19 Part 4 Trouble Shooting Guide 1 Ep Way VANG vei vers N N see AN nn 21 2 PUMPING DOWN sins iese ee See N Re ak ak ka ad dee AAS ge AGS ke ew AAR N Ge be A GE da kon 22 3 Evacuation All amount of refrigerant leaked nn tan aan RE annan RE ee 23 4 Gas Charging After Evacuation uses eene eene maataan nana EE KERKE Re aan RR ERK Rae AE 24 5 Cycle Troubleshooting Guide ul aaa ER KAS ER N EKEN ER N KG GR GEK ia kn 25 6 Electric Parts Troubleshooting Guide eise ese see sanne annan an anna ER KERKE annan 28 7 Self diagnosis Function EE GE N
19. 59 15 89 7 94 300 58 20 68 12 55 6 28 244 33 25 77 10 5 200 30 86 8 03 4 01 164 79 35 95 6 49 3 24 136 64 40 104 5 28 2 64 113 98 45 113 4 32 2 16 95 62 50 122 3 56 1 78 80 65 55 131 2 95 1 48 68 38 60 140 2 46 1 23 58 27 65 149 2 06 1 03 49 88 70 158 1 74 0 87 42 9 75 167 1 47 0 74 37 05 80 176 1 25 0 63 32 14 90 194 0 92 0 46 24 46 100 212 0 68 0 34 18 89 39 Part 4 Trouble Shooting Inspection Description of Number Inspection Cause of Error Check Point Float switch open Th A A CHO4 l The connection of wire Float switch raar AG Normal short e Indoor unit installation Inclination e Water over flow Check Flow Chart Check the level of water Float moves top position Is it normal No Check float switch 4 Yes Is the float m No switch clean gy Yes Check the wire connection Open Soldered poorly Is it normal m No Clean float switch Correct connection 4 Yes Is the resistance off loat switch normal short m No Check Point Or re soldering PCB Change the float switch 1 Check the wire connection Open Soldered poorly gt Repair the connection or change the PCB 2 Check the resistance of float switch Abnormal Open Normal short gt Check the float switch 3 Check the level of water 40 Part 4 Trouble Shooting luspachoh Description of Insp
20. C Check pipe folding and abnormality voltages at Power on standby state Check service valve lock 3 If the measurements are outside DC 2 5V 0 2V the parts are decided as burned Check fan locking Remedy remove cause of error Check compressor locking Check compressor wire disconnection Is the compressor normal open negative phase Check inside wire open short Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Check PCB Comp connector assembly status Is the outdoor unit PCB Check if PCB IPM burned IPM normal Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method Remedy replace PCB Assembly No Is Check phase current sensing part PCB phase current voltage measurements at Power on sensing circuit part standby state U V W gt DC 2 5V normal 0 2V Remedy replace PCB Assembly dT Part 4 Trouble Shooting 5 CH27 PSC Fault Over current Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint Over current on screened blocked CH27 AC gt DC converter Wrong application of eircuit Reactor Spec Burned PCB internal parts PSC Module e Check outdoor fan constraint screened flow structure Check Reactor Spec 10A 26 8mH Check for PCB internal part burn B
21. C Fault Error o Operation Compressor Phase Current Error N vi Phase over current occurred l ki Operation Ex Error Code 6 DC Peak Error Gtimes Gtimes 3sec 36 Ex Error Code 13 PSC Error Part 4 Trouble Shooting Troubleshooting Guide Indoor Unit Inspection Number Description of Inspection Cause of Error Check Point Check Sensor connection status and CHO1 Indoor Temperature Sensor Sensor short open Check Sensor Resistance l Check Sensor connection status and CHO2 Indoor pipe entry temperature sensor Sensor short open Check Sensor Resistance Check Sensor connection status and CH06 Indoor pipe exit temperature sensor Sensor short open Check Sensor Resistance taz Check Sensor connection status and CH12 Indoor pipe middle temperature sensor Sensor short open Check Sensor Resistance 1 Check if the temperature connection part is securely connected 2 After disconnecting from Temperature Sensor PCB Assembly measure each sensor s resistance e Location of the sensor Heat exchange TH3 S stn sa TH2 asi ED PSN x op TIFan x Liquid pipe Gas pipe STH Air Conditioner Operation Standard Symbol Color of the Connector Title Resistance Remark TH1 White CN TH1 Indoor Temperature Sensor 10 KO Pipe entrance Temperature Sensor 5KQ f a 25 C Basis TH2 Red CN TH2 Mi
22. R SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF e Check the connectors e Check that whether the housings and harnesses would be separated when there are attempts to disconnect those Check to pull with hands directly to the harness e No harness should be divided from the housing Turn on the main power d Check the SSR high speed operation by remote control the Indoor Fan Motor is connected The voltage of Pin No 1 orange and 3 black of CN FAN J About AC 160V over About AC 50V over SSR is not damaged Check SSR 31 Part 4 Trouble Shooting 7 Self diagnosis Function B Error Indicator The function is to self diagnosis airconditioner and express the troubles identically if there is any trouble If more than two troubles occur simultaneously primarily the highest trouble of error code is expressed After error occurrence if error is released error LED is also released simultaneously e To operate again on the occurrence of error code be sure to turn off the power and then turn on e Having or not of error code is different from Model W Indoor Unit Error 1 SW SB SC SH S4 S5 Chassis Error indication Error Description Indoor unit code LED1 LED2 1 Indoor Sensor Air open short 1 Time 2 Indoor Sensor Entry Pipe open
23. Shooting 2 CH22 CT2 Error Input Over current mspecton Error Detection Cause of Error Check Point Number Input voltage error low voltage Check input voltage AC Input current is higher Over load operation Check outdoor fan constraint screened flow CH22 We than the limit Outdoor fan constraint structure screened blocked Check PCB current sensor parts Burned parts inside PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB input current sensing circuit 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state Remedy inspect repair power 3 If the measurements are outside DC 2 5V 0 2V the board parts are decided as burned No Check if the input voltage is Is the input voltage within AC 190 260 V normal Yes Check Fan constraint indoor outdoor unit Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check overcharge refrigerant leakage Check service valve lock Check pipe folding Is
24. almost closed and air flow does not This symptoms normal come out Please wait until the unit is preparing warm air Even though outdoor e This function prepare to blow warm air unit is already begun to EE operate The air conditioner does not generate N l l a warm air In heating mode ice frost is built up on the coils when the outside temperature fall down ze e This function remove a layer of frost on the coil e Please wait until this operation is completed It takes about 15 mins e Outside temperature is r Ja 01 26 32 too low The heating effect may not be sufficient 61 62 The timer function could be operated If the timer e The air conditioner is function would operate the air conditioner can be 41 44 45 suddenly turn off turn off 65 e Check the timer setting is correct The air conditioner stops during oper There is the Auto Restart Function It is a default ation setting zn nn e This a can turn on the unit automatically 41 44 45 d op when the power is restored 65 tion If you live in frequent power failure area this function would be useful 26 Part 4 Trouble Shooting Problem Possible causes Corrective action Error Code The connection of the indoor and e Conduct the wiring and piping error 05 09 53 outdoor units has a problem check joa The air condi tioner stops The thermistor recognition has a e Check that the thermis
25. and 3 way valve s stem nuts and the ser vice port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage 22 Part 4 Trouble Shooting Outdoor unit e Procedure 1 Connect the vacuum pump to the center hose 3 Close the valve Lo side on the charge set of charge set center hose turn off the vacuum pump and confirm that the gauge needle does not move approxima 2 Evacuation for approximately one hour tely 5 minutes after turning off the vacuum Confirm that the gauge needle has moved pump toward 0 8 Torr 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed maga Part 4 Trouble Shooting Check valve Charging cylinder Outdoor unit e Procedure 1 Connect the charge hose to the charging cylinder Connect the charge hose which you dis con nected from the vacuum pump to the valve at the bottom of the cylinder This is different from previous procedures Because you are charging with liguid refrigerant from the gas side absolutely do not attempt to charge with larger amounts of liguid refrigerant while operating the air conditioner If you are using a gas cylinder also use a scale and reverse the cylinder so that the sys tem can be charged with liguid 2 Purge the air from
26. and remove cause of error Check the status of outdoor unit communication connector assembly Check the status of outdoor unit power connector assembly Remedy reconnect connectors replace PCB Assembly 67 Part 4 Trouble Shooting 10 CH60 Outdoor Unit PCB EEPROM Error Error Code Error Detection Cause of Error Check Point Incorrect checksum of Outdoor uni PEB CH60 outdoor unit PCB C EPROM misapplied EEPROM assembly EEPROM e Outdoor unit PCB EEPROM poor assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if EEPROM is missing Is the EEPROM properly Check the status of the EEPROM assembled assembly Remedy reassemble EEPROM Replace PCB Assembly Inspecting Outdoor EEPROM Assembly Status 1 Check the consistency of the EEPROM s direction inserted in the PCB and the EEPROM marking 68 Part 4 Trouble Shooting 11 CH61 Cond Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Fan constraint screened blocked Check fan constraint screened flow l Heat exchanger contaminated structure High temperature in N A CH61 Cond Pipe EEV connector displaced poor EEV Checkif refriger
27. ant overcharged assembly Check the status of EEV assembly Poor Cond Pipe sensor assembly Check the status of sensor assembly burn burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting Cond Pipe Sensor Check fan locking 1 Set Multi tester as resistance Remove blockings around heat exchanger measurement mode Maintain distance between outdoor unit and 2 Measure the resistance between rated Is the unit properly installed the wall i Check pipe annig Comp Discharge sensor connector AAA 3 Measure resistance value of 5kQ 10 25 C basis Remedy remove cause of error ae 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more Sensor Connector Is the refrigerant stoner chased Check if refrigerant is overcharged Remedy adjust refrigerant volume Is the EEV properly Check the status of PCB CN EEV1 assembled assembly Check the status of EEV assembly Remedy EEV reassemble replacement
28. arness would be separated by pulling those with hands directly Check for short circuit of PCB IPM Remove blockings around heat exchanger Input Signal Connector Is the unit installed Maintain distance between outdoor unit 1 Set as the multi tester resistance properly and the wall measurement mode N Selan sn as 2 Check the short circuit between the W input signal pins at the IPM SPM3 lower parts in Power off state Check Fan constraint Remedy remove the cause of error Check compressor constraint Check compressor wire disconnection Is the Compressor open negative phase Normal Check inside wire open short Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Yes Check PCB compressor connector assembly status Check if PCB IPM burned Check IPM input signal connector short circuit Check the balance of current in the compressor operation phase gt the difference between each phase current should be within 2A Remedy replace PCB Assembly 58 Part 4 Trouble Shooting Verifying compressor burn Table 1 Comp 1 Remove the connectors to the PCB Resistance between 2 Measure the resistance between the lines U me Ines a sae of each terminal of the compressor Refer V W 15 2 to Table 1 W U 15 2 3 Measure the resistance between each terminal and the chassis p
29. ce is on pause the sleep timer mode cannot be input 4 6 1 Sleep timer operation for cooling cycle While in cooling mode 30 min after the start of the sleep timer the setting temperature increases by 1 C 2 F After another 30minutes lapse it increases again by 1 C 2 F Setting temp C Cooling ON temp Setting temp 0 5 C 1 F Cooling OFF temp Setting temp 0 5 C 1 F 0 5 1 Sleep time hour NOTE Some Models are different by swing width and swing pattern 14 Part 2 Functions amp Controls 4 6 2 Sleep timer operation for heating cycle e While in heating mode 60 min after the start of the sleep timer the setting temperature decreases by 1 C 2 F After another 60minutes lapse it decreases again by 1 C 2 F Setting temp C Heating ON temp Setting temp Heating OFF temp Setting temp 4 0 C 8 F gt 1 2 Sleep time hr 4 7 Auto restart When the power comes back after a sudden power failure during operation the mode before the power failure is kept on the memory of the appliance and it automatically operates in the saved mode on the memory Operation mode that is kept on the memory State of operation ON OFF Operation mode setting temp selected airflow speed Sleep timer mode remaining time of sleep timer Auto Swing 15 u Part3 Test Run 1 Check before Test Run ee eek asse ua ana RR ee eanne aaeeea ee Gee anne
30. ddle Pipe Temperature Sensor 5KQ TH3 White CN TH3 Pipe Exit Temperature Sensor 5KQ 3 If the measurement indicates infinite or O Q please replace temperature sensor 4 If the measurement is normal then please check main indoor PCB and replace Method of Measurement 1 Disconnect Temperature Sensor connector Connector from the board 2 Place the range of the tester at 0 3 Measure the connector resistance Tester 37 Part 4 Trouble Shooting Check Method Measure resistance Refer to Check Point Resistance is adeguate Check Point 1 10k Q at 25 C 77 F 10 2 5k Q at 25 C 77 F 10 3 200k Q at 25 C 77 F 10 Yes Replace Sensor No LI Discharge Pipe Temp Sensor 200k2 Resistance White 200 165k2 25 30 C Resistance Black 10 8k2 25 30 C Resistance Blue 5 4k2 25 30 C k For more information please refer to the 38 page table 38 Part 4 Trouble Shooting Resistance Temp Sensor Table Resistance KO Temp CPF Air Sensor s Pipe Sensor D Pipe Sensor 30 22 204 35 102 17 25 13 146 97 73 49 20 4 107 09 53 55 15 5 79 3950 10 14 58 95 29 48 5 23 44 47 22 24 0 32 33 9 16 95 585 66 5 41 26 09 13 05 465 17 10 50 20 27 10 14 372 49 15
31. e Low 6 Times 3 Times 6 Times 3 Times 65 Heatsink Th Error Open Short 6 Times 5 Times 6 Times 5 Times 67 Outdoor BLDC Fan Lock 6 Times 7 Times 6 Times 7 Times 72 Failure 4Way 7 Times 2 Times 7 Times 2 Times 73 IGBT Damage 7 Times 3 Times 7 Times 3 Times 35 Part 4 Trouble Shooting E Old Model Error Error TES Error Indication Indoor Description x Code P Indoor Outdoor Operation Indoor Temperature Sensor Error 1 Suction Sensor open short o Operation Indoor Pipe Sensor open short Outdoor Temperature Sensor Error 2 Suction Sensor open short o o Operation Outdoor Pipe Sensor open short Humidity Temperature Sensor Error gt Humidity Sensor short gt Operation Heat Sink Temperature Sensor Error 4 Temperature Sensor open short o o Operation Compressor off Temperature lt Heat Sink Temperature 5 Poor Communication Indoor lt gt Outdoor Unit a Si The communication is stopped for more than 2 minutes op DC Peak Error 6 DC Peak occurred ka o Shutdown CT Error k CT detected o o Shutdown 8 Indoor Unit Fan Lock Error pa N Sto Fan Lock occurred BLDC Motor p Outdoor Unit Fan Lock Error 3 Fan Lock occurred BLDC Motor vd K Stop Compressor Dome Temperature Error 10 Discharge Pipe Sensor open short o o Operation Compressor off Temperature lt Discharge Pipe Temperature EEPROM Error EEPROM Check sum Error l ba Operation PSC Error is PS
32. e Shooting Inspection Number Description of Inspection Cause of Error Check Point if the Fan motor does not Structural locking of Fan Fan Locking faulty Poor connection of the motor connector operate after 1 minute of Motor operation initial operation Faulty motor l Faulty indoor unit PCB Assembly CH10 Type of Fault check procedure 1 Fan structurally Fan is locked by the Locking pi interference of other structures Cause of Error Verification Remedies Release lock by reassembling etc Turn the fan by hand and checking locking materials 2 Poor connection of 1 motor connector e Verify with hands certainly Connect motor connector displaced pulling by hand to check certainly j connection status Inspection Number CH10 2 Housing terminal e Verify with hands certainly Repair or displaced pulling by hand to check replace the connection status harness 3 Pin and wire Verify with hands certainly Repair or disconnection pulling by hand to check replace the or pressed connection status harness 3 Faulty motor e Replace motor LV 4 Faulty indoor unit Motor inner PCB etc Replace PCB burned indoor unit PCB 42 Part 4 Trouble Shooting B Trouble Shooting Guide Outdoor Unit 2 LED Type 1 CH21 DC Peak Error In jon i specto Error Detection Cause of Error Check Point Number Compressor meee e Check
33. e current sensing circuit on standby state U V W gt DC part normal 2 5V 0 2V Remedy replace PCB Assembly 49 Part 4 Trouble Shooting 7 CH32 Inverter Compressor D Pipe Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan constraint screened blocked Check outdoor fan constraint screened flow High temperature in Refrigerant leakage structure CH32 Discharge pipe of the insufficient Check refrigerant leakage inverter compressor Poor INV Comp Discharge Check if the sensor is normal sensor Check the status of EEV assembly LEV connector displaced poor LEV assembly Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Check fan locking Inspecting Inverter Compressor Discharge Remove blockings around heat Sensor exchanger 1 Set Multi tester as resistance measurement Maintain distance between outdoor mode unit and the wall 2 Measure the resistance between inverter a 11 009 discharge sensor connector pins 3 Measure resistance value of 200KQ 1096 25 C basis Check if the sensor i
34. ection Cause of Error Check Point Number AC 220V power input indoor outdoor unit Disconnection of the transmission connection RON Poor connection of connecting wires HON The communication DA Poor Communication betweenihdoores Communication line short in GND CHO5 Indoor Outdoor unit No power to outdoor unit PCB burned faulty outdoor unit is stopped for more than 3 minutes communication circuit faulty outdoor unit PCB communication circuit GND 1 2 not connected to the main power GND 1 Check input power AC 220V indoor outdoor unit N connector connections verify with hands NOU Po Check proper connection of the communication line gt check the status of the connection wire fault and Check the resistance between the communication line and GND normal 2kQ or more Check if the communication connections are properly connected Check indoor unit GND outdoor unit GND and main GND connections If the length of the communication line exceeds 50M separate the communication lines Check for the products or power lines near the communication line that may cause noise Inspection Number Description of Inspection Cause of Error Check Point CH09 CN OPTION PCB Poor connection of OPTION PCB Check the connection status of the OPTION PCB verify with hands 1 Check if the OPTION PCB is properly connected 41 Part 4 Troubl
35. ed Remedy remove cause of error Is the PCB Check the status of PCB Fan fan connector assembled connector assembly CN MOTOR1 amp properly MOTOR2 FAN MOTOR Remedy reassemble the connector CONNETOR Check the status of Fan motor wire disconnection Check the status of the Fan motor Is the Fan Motor normal middle connection connectors Check if Fan motor is burned gt measure voltage between Motor connector pins Tester Remedy replace Fan motor Remedy replace PCB Assembly Case of field defect 4 BLDC Fan Motor short Part 4 Trouble Shooting B Trouble Shooting Guide Outdoor Unit 1 LED Type 1 CH21 DC Peak Error In jon e specie Error Detection Cause of Error Check Point Number IP Sara Check compressor constraint Disconnection short l KG ee e Check compressor wire open short circuit inside compressor i a High current into the Check compressor insulation damage CH21 Over load operation compressor e Check outdoor fan constraint screened flow Outdoor fan constraint screened blocked siel Burned parts inside PCB EG IE died Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and h
36. efore checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB PSC Module signal input Check fan locking connector short circuit Remove blockings around heat 1 Set Multi tester as DC voltage measurement e ihe unt properly Yere between made installed dutdoor nit and the wall 2 Check the short circuits between PSC Module Check pipe folding and lower part input signal pins at Power off state abnormality Check service valve lock Remedy remove cause of error EH oi TE e Check Reactor spec Is the reactor normal 10A 26 8mH PSC Module 4 5 pins are Remedy replace reactor internally short circuited Check short circuit of PCB PSC Is the outdoor unit PCB Module input signal connector PSC Module normal 4 5pins are internally short circuited Remedy replace PCB Assembly 48 Part 4 Trouble Shooting 6 CH29 Compressor phase Over current Error only verifiable at Outdoor unit PCB Assembly Error Code Error Detection Cause of Error Check Point Compressor blocked Overload operation Check compressor locking Compressor input
37. eful of the short circuits with other parts part normal Is the sensor part normal Tester Is AC input current sensor Comp phase current DC voltage measurement at the measurement point in figure 1 RO1N at power on standby state gt measured value within 2 5V 0 2V Remedy replace PCB Assembly DC voltage measurement at the measurement point in figure 2 at power on standby state gt measured value within 2 5V 0 2V 51 Inspecting current sensing circuit Set Multi tester as DC voltage measurement mode 2 DC voltage measurement at both end of RO1N at power on standby state gt measured value should be within 2 5V 0 2V 3 DC voltage measurement at the measurement point in figure 2 at power on standby state gt measured value should be within 2 5V 0 2V ak Part 4 Trouble Shooting 9 CH41 44 45 65 Inv D Pipe Outdoor Inlet Cond Pipe Heat sink Sensor Error Error Code Error Detection Cause of Error Check Point Inv D Pipe sensor CH41 open short CH44 Outdoor Inlet sensor Sensor displacement poor open short assembly Check the status of sensor assembly CH45 Cond Pipe sensor Sensor burned disconnection Check if sensor is burned open short insulation damage B Diode Heat sink sensor CHES open short Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When
38. es 1 to 0 5kg cm G 14 2 to 7 1 P S I G fully close the gas side valve stem and then guickly turn off the unit At that time Pump Down has been completed and all refrigerant gas will have been collected in the outdoor unit 5 Check operating current gt Change operation mode and check 19 M Part4 Trouble Shooting 1 A Ep T UA T n 21 2 PUMPING DOWD T 22 3 Evacuation All amount of refrigerant leaked ans ER RE nananana eenn 23 4 Gas Charging After Evacuation nn ee Reekse ERA ana ana an aan a annan Ge EE 24 5 Cycle Troubleshooting Guide Lama isk kankan nen 25 6 Electronic Parts Troubleshooting Guide essens summana mana naamaa annan nanan 26 7 9eli diadnosls FUNCOM aaa 30 20 1 2 Way 3 Way Valve Part 4 Trouble Shooting 2 way Valve Liquid Side 3 way Valve Gas Side Hexagonal wrench 4mm Flare nut Open position Closed position To piping Valve cap Open position Closed position Flare nut piping Service Service connection connection port cap port To outdoor unit To outdoor unit Works Shaft position Shaft position Service port Shippin Closed Closed Closed pping with valve cap with valve cap with cap Air purging Open Closed Open 1 Installation counter clockwise clockwise push pin or with vacuum pump Open Open Closed Open with valve cap with valve cap with cap Pumping down Closed Open l Open
39. g PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB phase current sensing Remove blockings around heat circuit exchanger 1 Set Multi tester as DC voltage measurement Is the unit properly Maintain distance between outdoor mode installed unit and the wall 2 Measure the below measuring point DC Check pipe folding and abnormality voltages at Power on standby state JORE ANGE vele oek 3 If the measurements are outside DC 2 5V 0 2V the parts are decided as burned Check fan locking Remedy remove cause of error Comp current Yes TT TEI MEE X Ne Check compressor locking Check compressor wire disconnection Is the compressor normal open negative phase Check inside wire open short Check inside insulation damage Remedy Rearrange compressor wire disconnections Replace compressor Yes Check PCB Comp connector assembly i status Is the outdoor unit PCB Check if PCB IPM burned IPM normal Check PCB IPM input signal connectors short circuit gt Refer to Pt CH21 trouble shooting method D Remedy replace PCB Assembly GO Is Check p
40. gerous and may cause death or severe injury if come in contact with it Do not touch the discharging refrigerant gas during the repair work The discharging refrigerant gas The refrigerant gas can cause frostbite Release the refrigerant gas completely at a well ventilated place first Otherwise when the pipe is disconnected refrigerant gas or refrigerating machine oil discharges and it Can cause injury When the refrigerant gas leaks during work perform ventilation If the refrigerant gas comes in contact with a fire poisonous gas generates A case of leakage of the refrigerant and the closed room full with gas is dangerous because a shortage of oxygen occurs Be sure to perform ventilation When removing the front panel or cabinet execute short circuit and discharge between high voltage capacitor terminals If discharge is not executed an electric shock is caused by high voltage resulting in a death or injury OP 890 D Do not turn the air conditioner ON or OFF by plugging or unplugging the power plug There is risk of fire or electrical shock ds Part 1 General Information Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse Otherwise there is a risk of fire or electric shock Install the panel and the cover of control box securely Otherwise there is risk of fire or electric shock due to dust water etc Indoor outdoor wiring connections mus
41. harged j assembly Check the status of EEV assembly Poor Cond Pipe sensor assembly Check the status of sensor assembly burn burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting Cond Pipe Sensor Remove blockings around heat exchanger 1 Set Multi tester as resistance Maintain distance between outdoor unit and measurement mode the wall 2 Measure the resistance between rated Check pipe folding and abnormality speed Comp Discharge sensor connector Check SVC valve lock pins 3 Measure resistance value of 5k0 10 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more Check fan locking Is the unit properly installed Remedy remove cause of error Is the refrigerant Ed Check if refrigerant is overcharged Sensor Connector Remedy adjust refrigerant volume Is the EEV properly Check the status of PCB CN EEV1 assembled assembly Check the status of EEV assembly Remedy EEV reassemble replace
42. hase current sensing part PCB phase current voltage measurements at Power on sensing circuit part standby state U V W gt DC 2 5V normal 0 2V Remedy replace PCB Assembly 62 Part 4 Trouble Shooting 5 CH29 Compressor phase Over current Error only verifiable at Outdoor unit PCB Assembly Error Code Error Detection Cause of Error Check Point Compressor blocked Overload operation Check compressor locking Compressor input Outdoor fan constraint Check outdoor fan constraint screened flow CH29 al phase current is high screened blocked structure Burned PCB phase Check for PCB phase current sensor part current sensor part Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB phase current sensing circuit Check fan locking 1 Set Multi tester as DC voltage measurement Remove blockings around heat mode exchanger i i Maintain distance between 2 Measure at the below measuring point DC outdoor unit and the wall voltages at Power on standby state Check pipe folding and 3 If the measurements are outside DC 2 5V abnormality 0 2V
43. ion is in trou Adjust the position of the air conditioner 10 26 67 or vibration ble so that it can have enough space The indoor unit gives out odor e The air smells bad because a musty or cigarettes odor may be absorbed into the indoor unit and discharged with airflow If the smell does not disappear you need to wash filter or heat exchanger Contact the installer Temperature difference between intake and discharge air depends on room air humidity When the room air humidity is relatively higher temperature difference is smaller When the room air humidity is relatively lower tem perature difference is larger 27 Part 4 Trouble Shooting 6 Electronic Parts Troubleshc Trouble 1 The Product doesn t operate at all 9 30kBtu h Model Turn off the main power and wait until LED on outdoor PCB is off Turn on the main power again Does Beeping sound is made from the indoor unit Does Lighting LED is mounted on the outdoor PCB Check the voltage of power AC 208 230V 60Hz Primarily the operating condi tion of Micom is O K The voltage of main power The voltage applied to the unit JAL The connecting method of Indoor Outdoor connecting cable each color The P W B Ass y Fuse Noise Filter Power Module SMPS ICO1D ICO4D Check CN DISP1 Connection between housing and harness All the harnesses should be checked by pulling with hands directly N
44. ipe of the Table 1 compressor Refer to Table 2 in TE a terminal 4 fthe measurements are distinctively U nia a IMG 1 different from Table 1 and 2 the V chassis 1MQ compressor is decided to be burned W chassis IMO T Verifying IPM burn 1 Remove the connectors to the PCB 2 Set Multi tester as Diode voltage measurement mode 3 Measure voltages of P U P V P W as shown in figure 1 below 4 Measure voltages of U Nu V Nu W Nu as shown in figure 2 below 5 If the measurements are distinctively different as in the figures the IPM is decided to be burned ESE Z OZ IPM SI X amp Pin HEID Figure 1 Figure 2 59 Part 4 Trouble Shooting 2 CH22 CT2 Error Input Over current Inspection Error Detection Cause of Error Check Point Number Input voltage error low voltage Check input voltage AC Input current is higher Over load operation Check outdoor fan constraint screened flow CH22 NN than the limit Outdoor fan constraint structure screened blocked Check PCB current sensor parts Burned parts inside PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by
45. measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting Inverter Compressor Discharge Check the status of the PCB connector Sensor Is the sensor properly assembly 1 Set Multi tester as resistance measurement assembled Check the status of the sensor mode assembly 2 Measure resistance between the sensor connectors 3 Check if the sensor insulation is damaged gt Measure resistance between sensor Check if Masansar is disconnected connector pin and the unit assembly pipe Check if the sensor is burned 1MQ or more Is the sensor normal measure the resistance Remedy reassemble the sensor Check if the sensor insulation is Sensor Resistance Value 25 C basis damaged Inv D Pipe Sensor 200k Outdoor Inlet Sensor 10k Cond Pipe Sensor 5k B Diode Heat Sink Sensor 10k 52 Part 4 Trouble Shooting 10 CH53 Outdoor Unit lt gt Indoor Unit Communication Error Error Code Error Detection Cause of Error Check Point No power on indoor unit Check indoor unit power status If the data N a Indoor outdoor unit Power connection Check indoor outdoor unit transmitted by the BEE i A ear indoorunitisnot error communication line not installed power communication line disconnection CH53 Communication error caused by Check the status of indoor outdoor
46. ment Is the Cond Pipe the sensor assembly Status ainsat normal Check if the sensor is burned measure resistance gt 5K0 10 25 C basis 55 Part 4 Trouble Shooting 13 CH62 Heat Sink Overheat Error Error Code Error Detection Cause of Error Check Point Overload operation Outdoor fan Check outdoor fan constraint screened flow High temperature in constraint screened blocked structure CH62 outdoor PCB Heat Poor PCB Heat Sink assembly Check for the status of the PCB Heat sink Sink Poor PCB temperature sensing circuit connection parts Check PCB temperature sensing parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check fan locking Inspecting PCB PSC PFC Module Remove blockings around heat temperature sensing part Is the unit exchanger 1 Set Multi tester as resistance properly installed Maintain distance between measurement mode outdoor unit and the wall 2 Measure resistance between PSC PFC Check pipe folding and Module pins 19 20 at power off state abnormality N 5 Check serice valve lok 3 Measured resistance value of 7K0 10 25 C basis Remedy remove cause of error Is the PCB Check the connection between Heat Sink co
47. mes 2 Times 73 IGBT Damage 7 Times 3 Times 7 Times 3 Times 34 Part 4 Trouble Shooting 2 1 LED Type Ex Error Code 21 DC Peak Red LED Error Indication E Description Indoor Unit Outdoor Unit LED2 LED1 Red Red 21 DC Peak IPM Fault 2 Times 1 Time 2 Times 1 Time 22 CT 2 Max CT 2 Times 2 Times 2 Times 2 Times 23 DC Link Low Volt 2 Times 3 Times 2 Times 3 Times 25 Low wire volt high wire volt 2 Times 5 Times 2 Times 5 Times 26 DC Comp Position Error 2 Times 6 Times 2 Times 6 Times 27 PSC Fault Error 2 Times 7 Times 2 Times 7 Times 29 Inverter Compressor over current 2 Times 9 Times 2 Times 9 Times 31 CT error low current 3 Times 1 Time 3 Times 1 Time 32 D Pipe High INV 3 Times 2 Times 3 Times 2 Times 37 Failure Compression Ratio 3 Times 7 Times 3 Times 7 Times 40 CT Sensor Open Short 4 Times 4 Times 41 INV D Pipe Th Error Open Short 4 Times 1 Time 4 Times 1 Time 44 Outdoor Air Th Error Open Short 4 Times 4 Times 4 Times 4 Times 45 Cond Middle Pipe Error Open Short 4 Times 5 Times 4 Times 5 Times 48 Cond Out Pipe Error Open Short 4 Times 8 Tiems 4 Times 8 Tiems 53 Communication Failure Outdoor Unit Indoor Unit 5 Times 3 Times 5 Times 3 Times 60 EEPROM Check Sum Error 6 Times 6 Times 61 Cond Pipe High 6 Times 1 Time 6 Times 1 Time 62 Heatsink High 6 Times 2 Times 6 Times 2 Times 63 Cond Pip
48. n be used when the outdoor air tempera ture is over 10 C 25 Part 4 Trouble Shooting Problem Possible causes Corrective action Error Code Air is not circulatingprop Make sure that there are no curtains blinds or fur erly niture blocking the front of the air conditioner fitar Le di Clean the air filter once every 2 weeks The air filter is dirty e See Cleaning Air Filter for more information In summer it may take some time to cool indoor air IE koo temperature is In this case select the jet cool operation to cool 01 05 09 gn indoor air quickly Cold air is escaping rom Make sure that no cold air is escaping through HABA diti the room ventilation points in the room e air conditioner does not generate i l cool air 9 ig ete temperature Set the desired temperature to a level lower than gher than the set th tt t 01 temperature e current temperature e Thana ica heat e Avoid using a heat generator such as an electric so rc nearb g oven or a gas burner while the air conditioner is in y operation Airai In the air circulation operation air blows from the air ea operation conditioner without cooling or heating the indoor air Switch the operation mode to the cooling operation e Outside temperature is s 01 26 32 too high The cooling effect may not be sufficient 61 62 When the heating mode is started e Vane is
49. nditioner unplug the power cord ing conditions The power cord is dam and contact the service center aged or generating excessive heat A switch a circuit breaker safety ground or a fuse is not operated properly e The air conditioner is Check whether the power cord is plugged into the unplugged outlet A fuse is blown or the Replace the fuse or check if the circuit breaker 27 power supply is blocked has tripped Turn off the air conditioner when a power failure A power failure has occurs a occurred When the power is restored wait 3 minutes and then turn on the air conditioner The air conditioner does not work i ae is too high Check if the circuit breaker has tripped 23 40 The air conditioner turned off automatically Press the power button again 10 at a preset time Is the battery inserted in Remote controller Is the Battery setting is wrong battery inserted with the correct terminal in the remote controller Even if you check the upper lists the air conditioner does not operate Please replace new batteries The type of the indoor units is not compatible Replace the outdoor unit to suitable one 05 53 The air conditioner does not work with that of the outdoor unit e The outdoor air tempera ture is unsuitable for operating the air condi tioner Heating operation can be used when the outdoor air temperature is under 18 C and cooling opera tion ca
50. nn 2 Test Run Flow chart sees ee ee onnaa anne KON na anna aa aa aan naamaa naamaa una RR auma naamaan annan 3 Test Run Detail N EN aa EE EE OE N nannaa 16 Part 3 Test Run 1 Check before Test Run Check to see whether there is any refrigerant leakage and check whether the power or transmission 1 cable is connected properly NOTE Check that there should be no disconnection when all pins and wires are pulled by hands Check whether the liguid pipe and gas pipe valves are fully opened 2 NOTE Be sure to tighten caps Confirm that 500 V megger shows 2 0 MO or more between power supply terminal block and ground Do not operate in the case of 2 0 MO or less NOTE Never carry out mega ohm check over terminal control board Otherwise the control board may break 3 Immediately after mounting the unit or after leaving it turned off for an extended length of time the resistance of the insulation between the power supply terminal board and the ground maydecrease to approx 2 0 MO as a result of refrigerant accumulation in the internal compressor If the insulation resistance is less than 2 0 MO turn on the main power supply 17 Part 3 Test Run 2 Test Run Flow chart START Test operation for indoor unit Operate the unit in cooling mode o Refer to part4 6 Electric part Does Test operation start Is cold air discharged for more than 3 minutes Yes Refer to part4 5 Cycle pa
51. nnected PCB Heat Sink and the PSC PFC properly Module Screw Remedy reassemble the screw Are the PCB temperature sensing parts normal Measure resistance between PCB PSC PFC Module 19pin and 20pin gt 7K0 10 25 C basis Remedy replace PCB Assembly 56 Part 4 Trouble Shooting 14 CH67 Outdoor BLDC Fan Lock Error Error Code Error Detection Cause of Error Check Point Outdoor BLDC Fan Lock The outdoor unit PCB Fan connector displaced CH67 BLDC Fan operation BLDC Fan motor burned wire F Back signal does disconnected not come on PCB BLDC Fan operation circuit burned Check for the status of outdoor fan assembly Check for the status of the PCB Fan connector assembly Check Fan motor wire disconnection Check if Fan motor burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check the status of fan locking out off Inspecting Outdoor BLDC Fan Motor burn lace 1 Set Multi tester as Diode voltage i ee a 5 Check operational difficulties by measurement mode 9 foreign subjects 2 Measure voltage between Fan motor connector pin 1 and pin 4 at power off state 3 Measured voltage value of 1V 0 2V means the motor is internally burn
52. nsulation is damaged gt measure the resistance between sensor Yes connector pin and unit assembly pipe 1MQ or more Is the unit properly installed Remedy remove cause of error EN ie spao Check refrigerant leakage Sensor re enoug Supply refrigerant if not enough Connector refrigerant refrigerant Tester Remedy Treat the leakage point Supply additional refrigerant Check the status of PCB CN EEV1 Q assembl Is the EEV properly Check the status of EEV assembly D assembled Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method Remedy LEV assembly replacement Ccheck the sensor assembly status Check if the sensor is burned measure resistance gt 200K0 10 25 C basis Is the inverter compressor sensor normal 50 8 CH40 CT Sensor Error Open Short Part 4 Trouble Shooting Error Code Error Detection Cause of Error Check Point AC Input current CH40 Comp phase current PCB sensing circuit part Check power input connector Comp output sensing circuit basic burned current sensing circui voltage sensing error Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be car
53. ntake temperature and the discharge is more than 8 C 46 F Cooling or Heating Discharge temperature 4 For reference the gas side pressure of optimum condition is as below Cooling The pressure of the gas side Outside ambient TEMP service valve Refrigerant R22 35 C 95 F 4 5kglem G 56 8 71 0 P S I G R410A 35 C 95 F 8 5 9 5kglem G 120 135 P S 1 G Part 3 Test Run NOTE If the actual pressure is higher than shown the system is most likely over charged and charge should be removed If the actual pressure are lower than shown the system is most likely undercharged and charge should be added The air conditioner is now ready for use PUMP DOWN This is performed when the unit is to be relocated or the refrigerant circuit is serviced Pump Down means collecting all refrigerant in the outdoor unit without loss in refrigerant gas CAUTION Be sure to perform Pump Down procedure with the unit in cooling mode Pump Down Procedure Connect a low pressure gauge manifold hose to the charge port on the gas side service valve 2 Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas W Close the liquid side service valve all the way in IN Turn on the unit s operating switch and start the cooling operation 5 When the low pressure gauge reading becom
54. o harness should be divided from the housing The operation check of the P C B Ass y Procedure Specification Remedy 1 The input voltage of Power DC 220V 390V Module SMPS 2 The output voltage of Power 15V 10 Replace the P C B Module SMPS 3 ICO1D LD1085 ICO4D 7805 DC BV 28 Part 4 Trouble Shooting Trouble 2 Product doesn t operate with the remote controller Tum on main power LS While the compressor has been stopped the compressor does not operate owing to the delaying function for 2 minutes after stopped LL When the compressor stopped Indoor Fan is driven by a low speed At this point the wind speed is not controlled by the remote controller When operated in the Sleeping Mode the wind speed is set to the low speed as force LL Caused by the remote controller Caused by other parts except the remote controller e lt When the mark 4 is displayed in LCD Check the contact of CN DISP 1 2 connector screen replace battery Ir Check DISP P C B Ass y Voltage between CN DISP1 DC 5V Check point e Check the connecting circuit between MICOM PIN and CN DISP1 PIN e Check receiver ass y 29 Part 4 Trouble Shooting Trouble 3 The Compressor Outdoor Fan don t operate Turn on the main power
55. ode the room temperature is maintained at a temperature of 30 C 86 F When the sleep timer mode is input during the Jet Heat mode operation the Jet Heat mode has the priority When the Jet Heat button is pressed the horizontal vane of the unit is the unit reset to those of the initial Jet heating mode and then operates so that the air outflow could reach under flow 3 3 Energy saving operation in cooling mode During cooling and dehumidification mode of operation the Energy saving button can be input In this operation before we feel cold the set temperature and air volume is set automatically to save energy 12 Part 2 Functions amp Controls 4 Utility Functions 4 1 Forced operation To operate the appliance manually in case when the remote control is lost the forced operation selection switch is on the main unit of the appliance and operate the appliance in the standard conditions The operating condition is set according to the outdoor temp and intake air temperature as follows tti d of Indoor temp Operating Mode Setting temp Se bot 7 over 24 C 75 2 F Cooling 22 C 71 6 F 21 24 C 69 8 75 2 F Healthy Dehumidification 23 C 73 4 F High speed below 21 C 69 8 F Heating 24 C 75 2 F Operating procedures when the remote control can t be used is as follows The operation will be started if the ON OFF button is pressed If you want to stop operation re pres
56. ode from cooling to heating and vice versa 4C 8F Switching point 2C 4F Heating thermo off 0 5C 1F Setting Temp 0 5C 1F Cooling thermo off 2C 4F Switching point I Cooling N Cooling Mode operation Heating operation operation 11 Part 2 Functions amp Controls 3 Special Mode Controls 3 1 Jet Cool operation In the heating mode or Auto Changeover operation the Jet cool function does not work When it is input while in other mode of operation cooling dehumidification Air purification Air circulation the Jet cool operation takes place In the Jet cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet cool mode the room temperature is maintained at a setting temperature of 18 C 64 4 F When the sleep timer mode is input during the Jet cool operation the Jet cool mode has the priority When the Jet cool button is pressed the horizontal vane of the unit is reset to those of the initial cooling mode and then operate so that the air outflow could reach further 3 2 Jet Heat operation While in cooling mode or Auto Changeover operation the Jet Heat function does not work When it is input while in the Heating mode operation dehumidification the Jet Heat mode operation takes place In the Jet Heat mode the indoor fan operated at super high speed for 60 min at Heating mode operation In the Jet Heat m
57. ppliances otherwise it can cause an electrical shock excessive heat generation or fire Do not insert hands or other objects through the air inlet or outlet while the prod uct is operating There are sharp and moving parts that could cause personal injury 0000 Do not block the inlet or outlet of air flow It may cause product failure ACAUTION Check to see if the parts are mounted correctly and wires are connected Improper installation and connections can cause an electric shock or an injury Check whether the installation platform or frame has corroded Corroded installa tion platform or frame can cause the uniit to fall resulting in injury Be sure to check whether the earth wire is correctly connected After the work has finished be sure to do an insulation test to check whether the resistance is 2 Mohm or more between the charge section and the non charge metal section Earth position If the resistance value is low a disaster such as a leak or electric shock is caused at user s side POP Check the drainage of the indoor unit after the repair If drainage is faulty the water may enter the room and wet floor Part 1 General Information 2 Nomenclature 2 1 Global Model Name A S W 1 2 6 B M S 0 1 2 3 4 5 6 7 8 9 10 Code Type Code of Model Meaning 1 Production Center A Z Refrigerant Chang won R
58. pulling those with hands directly Inspecting PCB input current sensing circuit 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state Remedy inspect repair power 3 If the measurements are outside DC 2 5V 0 2V the board parts are decided as burned No Check if the input voltage is within AC 190 260 V Is the input voltage normal Yes GND Check Fan constraint indoor outdoor unit Remove blockings around heat exchanger Maintain distance between outdoor unit and the wall Check overcharge refrigerant leakage Check service valve lock Check pipe folding Is the unit installed properly Check voltage measurement on the input current at the power on standby state DC OV 0 2V Remedy replace PCB Assembly Input Current 60 Part 4 Trouble Shooting 3 CH23 DC Link Low Voltage Error Inspection Error Detection Cause of Error Check Point Number DC Link voltage is lower Inpubyallaga aHGron va voltage Check input voltage aa ME ahad E Burned parts inside Check PCB DC Link voltage sensor parts 140Vrms PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other
59. r connector assembly status Check if PCB IPM burned Check IPM input signal connector short circuit Check the balance of current in the compressor operation phase 5 the difference between each phase current should be within 2A Remedy replace PCB Assembly 43 Part 4 Trouble Shooting Verifying compressor burn Table 1 Som 1 Remove the connectors to the PCB Resistance between the 2 Measure the resistance between the lines Ines of each terminal of each terminal of the compressor Refer V W 05 10 to Table 1 W U 0 5 10 3 Measure the resistance between each terminal and the chassis pipe of the Table 1 compressor Refer to Table 2 EE n a terminal 4 fthe measurements are distinctively U chassis a 2 MO T different from Table 1 and 2 the V chassis TMO f compressor is decided to be burned W chassis IMO 1 1 Remove the connectors to the PCB 2 Set Multi tester as Diode voltage measurement mode 3 Measure voltages of P U P V P W as shown in figure 1 below 4 Measure voltages of U Nu V Nu W Nu as shown in figure 2 below 5 If the measurements are distinctively different as in the figures the IPM is decided to be burned SPM3 P U V W Nu Nv Nw SOO 26 25 24 23 22 21 27 en D Case of field defect H IPM Over Current Limit LI Bending Folding LI SVC Valve close 44 Part 4 Trouble
60. r unit transmitted by the ee AA ind or unitis not error communication line not installed power communication line disconnection CH53 Communication error caused by Check the status of indoor outdoor unit external noise Indoor outdoor unit communication circuit parts burned ground connections Check if outdoor unit communication parts are burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Are the power and the operation status of indoor the power and communication lines connection status grounding connection status normal Is outdoor unit communication circuit normal Check if the indoor unit power is on Check the status of indoor unit normal operation when it is powered on again by remote controller Are Remedy replace Indoor unit PCB Assembly Check indoor outdoor unit power and communication line connection L amp N status and the status of disconnection ormal misplacement Check the status of outdoor unit Is the grounding connection Check the status of indoor unit grounding connection Check if there is a power line causing noise near indoor outdoor unit power communication lines Remedy connect grounding
61. rt Is there any temperature difference between intake and discharged air D n Yes Is the operating current No Check the load In Out Temp normal Check pipe length and amount of Yes refrigerant Check for abnormal sound in outdoor unit comp Fan others Operation mode change to Heating mode Is hot air discharged No Refer to Troubleshooting After Hot Start Guide Yes Normal NOTE When outdoor temperature is low the unit is operated to Heating mode 18 3 Test Run Detail 1 Check that all tubing and wiring have been properly con nected 2 Check that the gas and liguid side service valves are fully open 3 Check that all pins and wires have been connected thor oughly by pulling with hands Settlement of outdoor unit Anchor the outdoor unit with a bolt and nut 910mm tightly and horizontally on a concrete or rigid mount When installing on the wall roof or rooftop anchor the mounting base securely with a nail or wire assuming the influence of wind and earthguake In the case when the vibration of the unit is conveyed to the hose secure the unit with an anti vibration bushing Tubing connection Evaluation of the performance Operate unit for 15 20 minutes then check the system refrigerant charge 1 Measure the pressure of the gas side service valve 2 Measure the temperature of the intake and discharge air 3 Ensure the difference between the i
62. s the button The ON OFF switch is on the display PCB or side of indoor unit 4 2 Auto cleaning operation Function used to perform Self Cleaning to prevent the Unit from Fungus and bad odor Used after the Cooling Operation before turning the unit off clean the Evaporator and keep it dry for the next opera tion The function is easy to operate as it is accessed through the Remote controller ON OFF Cooling CYCLE ON Indoor Fan Setting Step Super Low 13 Part 2 Functions amp Controls 4 3 Air volume control Ulndoor fan motor control have 6 steps or 8 steps Step Description UAir volume is controlled SH H MH M ML L by the SL Super Low remote controller L Low SL step is selected in Sleep Mode operation ML Medium Low M Medium 4 4 Natural Air Control Natural Wind le Medinet When the Auto Step is selected and then operated the high medi J pigh um or low speed of the airflow mode is operated for 2 15 sec ran SH Super High domly by the Chaos Simulation Auto Natural Wind 4 5 Auto Swing By the Auto swing key input the horizontal vane automatically operates with the Auto swing or it is fixed to the desired direction 4 6 Sleep mode Auto control When the set sleep time is reached set time of 1 2 3 4 5 6 7hour input by the remote control during the operation the operation of the appliance stops When the applian
63. short 2 Times 4 Float Switch Error 4 Times 5 Communication Failure Indoor Unit lt gt Outdoor Unit 5 Times 6 Indoor Sensor Exit Pipe open short 6 Times 9 EEPROM ERROR Indoor Unit 9 Times 10 Indoor Unit Fan Lock Operation Failure 1 Time 12 Indoor Sensor Middle Pipe open short 2 Times 1 Time 1 SW SB SC Chassis LED1 1 Digit LED2 10 Digit 3 SH Chassis NEE ee 2 SE Mirror S8 SD SM SN Chassis Ex Error Code 5 Communication Failure BH HE EH 2 S4 S5 Chassis 4 LED Model 1 Digit 10 Digit 32 LED1 LED2 1 Digit 10 Digit LED2 Part 4 Trouble Shooting 3 SF Chassis 1 LED Model Error code Description Indoor Sensor Air open short Indoor Sensor Entry Pipe open short Float Switch Error Communication Failure Indoor Unit lt gt Outdoor Unit Indoor Sensor Exit Pipe open short EEPROM ERROR Indoor Unit Indoor Unit Fan Lock Operation Failure Indoor Sensor Middle Pipe open short O OO AJIN esk J sk No Ex Error Code 2 Indoor Sensor Entry Pipe open shot RN ko 2sec 2sec LED1 Ex Error Code 12 Indoor Sensor Middle Pipe open short Ko kolk 2sec 3sec 2sec 4 S3 Chassis Lighting Model 1 Digit 10 Digit 33 Part 4 Trouble Shooting E Outdoor Unit Error 1 2 LED Type LED1 Green 1 Digit LED2 Red 10 Digit Error Indication
64. t be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals Improper or loose connections can cause heat generation or fire O gt amp Do not touch operate or repair the product with wet hands Holding the plug by hand when taking out Otherwise there is risk of electric shock or fire ACAUTION Do not turn on the breaker when the front panel and cabinet are removed Be sure to ground the air conditioner with an earthing conductor connected to the earthing terminal Conduct repair works after checking that the refrigerating cycle section has cooled down sufficiently Otherwise working on the unit the hot refrigerating cycle section can cause burns Do not tilt the unit while removing panels Otherwise the water inside the unit can spill and wet floor Do not use the welder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency gt OOS PP Be sure to turn off power switch before connecting or disconnecting connector or parts damage may be occur Part 1 General Information 1 2 Inspections after Repair A WARNING Check to see if the power cable plug is not dirty or loose If the plug is dusty or loose it can cause an electrical shock or fire Do not use a joined power cable or extension cable or share the same power outlet with other electrical a
65. tandby state is DC 280 Sensor par nonna 310V and DC Link sensed voltage DC 2 4 2 8V Remedy replace PCB Assembly 46 Part 4 Trouble Shooting 4 CH26 DC Comp Location Sensing Error Error Code Error Detection Cause of Error Check Point e Compressor Locking Overload operation Check compressor locking Over current at the i ne Outdoor fan constraint 8 Compressor wire open short initial operation of the compressor location screened blocked Check compressor insulation damage CH26 TA Burned parts inside Check outdoor fan constraint screened flow sensing signal for compressor operation PORIN a KOP Burned PCB phase Check if IMP burned refer to CH21 is not input ae S S current sensing circuit Check on PCB current sensing circuit parts parts Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Inspecting PCB phase current sensing Remove blockings around heat circuit exchanger 1 Set Multi tester as DC voltage measurement Is the unit properly Maintain distance between outdoor mode installed unit and the wall l 2 Measure the below measuring point D
66. the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Be careful of the liguid refriger ant The procedure is the same if using a gas cylinder 3 Open the valve Lo side on the charge set and charge the system with liguid refrigerant If the system can not be charged with the spec ified amount of refrigerant it can be charged with a little at a time approximately 150g each time while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin 24 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be dis charged If the system has been charged with liguid refrigerant while operating the air conditioner turn off the air conditioner before disconnecting the hose 5 Mount the valve stem nuts and the service port nut Use torgue wrench to tighten the service port nut to a torgue of 1 8 kg m Be sure to check for gas leakage Part 4 Trouble Shooting p 5 Cycle Troubleshooting Guide Problem Possible causes Corrective action Error Code There is a burning smell and a strange sound coming from the unit e Water leaks from the indoor unit even when Abnormal operat me MON VEL laws i Turn off the air co
67. the measurement mode of the meter be careful of the short circuits with other parts caution Check that whether the housings and harness would be separated by pulling those with hands directly Check fan locking Inspecting Inverter Compressor Discharge Remove blockings around heat Sensor exchanger Set Multi tester as resistance measurement Maintain distance between outdoor mode unit and the wall 2 Measure the resistance between inverter a el discharge sensor connector pins 3 Measure resistance value of 200KQ 1095 25 C basis 4 Check if the sensor insulation is damaged gt measure the resistance between sensor connector pin and unit assembly pipe 1MQ or more Is the unit properly installed Remedy remove cause of error CN TH2 Yellow 3Pin Connector Check refrigerant leakage Supply refrigerant if not enough refrigerant Is there enough refrigerant Remedy Treat the leakage point Supply additional refrigerant Check the status of PCB CN EEV1 assembly Is the EEV properly Check the status of EEV assembly assembled Check PCB IPM input signal connectors short circuit gt Refer to CH21 trouble shooting method Remedy LEV assembly replacement Ccheck the sensor assembly status Check if the sensor is burned measure resistance gt 200K0 10 25 C basis Is the inverter compressor sensor normal 64 Part 4 Trouble Shooting 7
68. the unit installed properly IN I Yes Check voltage measurement on the input current sensor at the power on standby state gt DC 2 5V 0 2V Is the PCB input current sensor normal e Remedy replace PCB Assembly 45 Part 4 Trouble Shooting 3 CH23 DC Link Low Voltage Error Inspection Error Detection Cause of Error Check Point Number DC Link voltage is lower MAN YO lane Errando an voltage Check input voltage Bles ihan phe limit Under UG Burned parts inside Check PCB DC Link voltage sensor parts 140Vrms PCB Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting PCB DC Link voltage sensing Check if the input voltage is circuit within AC 190 260 V 1 Set Multi tester as DC voltage measurement mode 2 Measure the measuring point DC voltages at Power on standby state 3 If the measurements are outside DC 2 4 2 8V the parts are decided as burned Is the input voltage normal Remedy inspect repair power board Measure DC Link voltage at Is the PCB Power Power on standby state part normal DC 280 310V Remedy replace PCB Assembly If measurement of DC Link voltage at Power on PCB DC ah me s
69. tion damage B Diode Heat sink sensor CHES open short Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Inspecting Inverter Compressor Discharge Check the status of the PCB connector Sensor Is the sensor papell assembly 1 Set Multi tester as resistance measurement assembled Check the status of the sensor made assembly 2 Measure resistance between the sensor connectors 3 Check if the sensor insulation is damaged gt Measure resistance between sensor wheel the sensor is disconnected connector pin and the unit assembly pipe Check if the sensor is burned 1MQ or more Is the sensor normal measure the resistance l l e Check if the sensor insulation is Sensor Resistance Value 25 C basis Yes Remedy reassemble the sensor damaged Inv D Pipe Sensor 200k Outdoor Inlet Sensor 10k Cond Pipe Sensor 5k B Diode Heat Sink Sensor 10k 66 Part 4 Trouble Shooting 9 CH53 Outdoor Unit lt gt Indoor Unit Communication Error received for 3 minutes continuously Error Code Error Detection Cause of Error Check Point No power on indoor unit Check indoor unit power status If the data a G Indoor outdoor unit Power connection Check indoor outdoo
70. tor have been 09 32 41 during opera defect separated from the pipe holder 45 tion The electronic expansion valve e Check the temperature of the connection 44 61 65 operates incompletely pipe di Indoor unitis Auto Clean mode is being operat Please wait until the end of functions still operating ed mee even when the N It will be inhibit a fungal growth 67 power is being This function is to remove the rest If you do not want this feature you can turned off of moisture indoor unit turn off to press Mist is dis charged from The cooled air from the air condi When the room temperature is down 01 02 06 the air outlet of tioner makes mist this phenomenon will disappear 12 the indoor unit Water leaks In the heating operations con This symptom need to install drain hose from the out densed water drop from the heat under the base pan door unit exchanger e Contact the installer e Clicking sound Clicking sound can be heard either when the unit starts or stops due to movement of reversing valve Creaking sound N The plastic parts of the indoor unit Operating noise make sound of shrinks and These are normal symptoms 41 45 62 or vibration expands due to a sudden tempera After a moment it will be silent os ture change The water flowing sound Blowing sound The flow of refrigerant through the air conditioner is switching noise can be heard Operating noise The installation condit
71. unit received for 3 external noise ground connections minutes A a c NO Indoor outdoor unit communication Check if outdoor unit communication parts are continuously ide circuit parts burned burned Before checking PCB or each outdoor electric parts wait for 3 minutes after the power is off warning When measuring at standby state of power supply after checking the measurement mode of the meter be careful of the short circuits with other parts Check if the indoor unit power is on Are the power and the Check the status of indoor unit normal operation status of indoor operation when it is powered on again unit normal by remote controller Remedy replace Indoor unit PCB Assembly the Ki and Check indoor outdoor unit power and communication lines communication line connection L amp N connection status status and the status of disconnection ormal misplacement Check the status of outdoor unit grounding connection Check the status of indoor unit grounding connection Check if there is a power line causing noise near indoor outdoor unit power communication lines Is the grounding connection status normal Remedy connect grounding and remove cause of error Is outdoor Check the status of outdoor unit unit communication communication connector assembly circuit normal Check the status of outdoor unit power connector assembly Remedy

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