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Room Air Conditioner

Part 4 Trouble Shooting

Turn on the main power.

When in air circulation mode, compressor/outdoor fan is stopped.

Turn off main power.

Check the electrical wiring diagram of Outdoor side.
Check the open or short of connecting wires between Indoor and Outdoor.

Check the sensor for Indoor temperature is attatched as close as to be effected by the
themperature of Heat Exchange (EVA.)

When displaying Error code, refer to the trouble shooting guide.

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.

Operate Cooling Mode by setting the disired temperature of the remote controller is less
than one of the Indoor temperature by 1°C at least.

The Compressor/Outdoor Fan don't operate (18, 24, 30kBtu/h Model)

Trouble 4

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Summary of Contents for CH01

Page 1: ...onditioner SVC MANUAL General MODEL General Wall Mounted Inverter Type CAUTION Before Servicing the unit read the safety precautions in this SVC manual Only for authorized service personnel http biz lgservice com ...

Page 2: ... Mode Controls 12 4 Utility Functions 13 5 Protection Functions Controls 16 Part 3 Test Run 1 Check before Test Run 31 2 Test Run Flow chart 32 3 Test Run Detail 33 Part 4 Trouble Shooting Guide 1 2 Way 3 Way Valve 35 2 Pumping Down 36 3 Evacuation All amount of refrigerant leaked 37 4 Gas Charging After Evacuation 38 5 Cycle Troubleshooting Guide 39 6 Electric Parts Troubleshooting Guide 41 7 Sel...

Page 3: ...Service Manual 3 1 Safety Precautions 4 2 Nomenclature 7 Part 1 General Information ...

Page 4: ...s extremely dangerous 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...

Page 5: ...n cause oxygen deficiency Be sure to turn off power switch before connecting or disconnecting connector or parts damage may be occur 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 wat...

Page 6: ...e resistance value is low a disaster such as a leak or electric shock is caused at user s side Check the drainage of the indoor unit after the repair If drainage is faulty the water may enter the room and wet floor 1 2 Inspections after Repair 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 ...

Page 7: ... 8 Look A Z Look Color Artcool Model 9 10 Function A Z 11 Serial No 1 9 LG Model Development Serial No 1 2 3 4 5 6 7 8 9 10 A Basic B Basic 4Way C Plasma Filter D Plasma Filter 4 Way E Tele LCD F Tele LCD Nano plasma 4Way G NBF F A changeove A clean Low A H NBF F A changeove A clean 4way Low A I Tele LED 4way J Internet K Plasma F 4Way Oxygen generator L NBF F A changeove A clean M NBF F A changeo...

Page 8: ...8 Room Air Conditioner Part 2 Functions Controls 1 List of Controls Functions 9 2 Basic Mode Controls 10 3 Special Mode Controls 12 4 Utility Functions 13 5 Protection Functions Controls 16 ...

Page 9: ...e Powerful cooling mode Powerful heating mode Air volume set temp are automatically selected for saving energy in cooling mode Operation without remote controller After cooling operation this function makes the evaporator dry Indoor Fan speed Control Air volume control Program Vertical Airflow Direction control Air volume set temp are automatically changed for com fortable sleep When power returns...

Page 10: ... restart minimum 2 minutes later 2 2 Heating Mode T1 C T2 F T2 C T4 F Comp OFF INV Comp Frequency Low High Low High Comp OFF Setting Temp Thermo ON Thermo 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 3...

Page 11: ...ake air temperature and operation mode The air volume is automatically set according to the intake air temperature 2 5 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 tempe...

Page 12: ...ration While in cooling mode or Fuzzy 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 mode the room temperature is maintained at a temperature of 30 C 86 F When the sleep tim...

Page 13: ...is pressed If you want to stop operation re press 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 a...

Page 14: ...Mode 4 Mode 5 Mode 6 Mode 8 OPEN CLOSED 8 Cooling Operation 110 Start Part 2 Functions Controls 4 3 Air volume control Indoor fan motor control have 6 steps Air volume is controlled SH H Med Low by the remote con troller LL step is selected automatically in Hot start operation 4 4 Natural Air Control Auto Wind When the Auto Step is selected and then operated the high medi um or low speed of the ai...

Page 15: ...of the sleep timer the setting temperature decreases by 1 C 2 After another 60minutes lapse it decreases again by 1 C 2 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 opera...

Page 16: ...by model 5 4 Freeze prevention Protection of the evaporator pipe from frosting If the indoor pipe temperaure is below 0 C 32 F in 7 min after the compressor operates without pause while in cool ing cycle operation mode compressor outdoor fan are turned off When indoor pipe temp is 7 C 44 6 F or higher after 2 min pause of compressor compressor outdoor fan is turned on according to the condition of...

Page 17: ...mp off Inapplicable 4 Way Indoor FAN Indoor FAN Pre Heat LED 5sec 5sec Minimum Time Of Heating Main Deice time 30sec 10sec 1min ON OFF Hi Speed ON Setting Speed Hot Start OFF Super low speed low speed ON OFF OFF Deice STEP 0 1 2 3 4 5 6 EEV Open step The Degree of Superheat Control Starting Step off Min Option _ 12 Step 3 Option _ 15 300 Option _ 14 off Step 5 Option _ 13 Min Option _ 12 off 15sec...

Page 18: ... min b After 10 minutes from re starting the compressor In case of being over 35 minutes of accumulated operating time defrosting operation starts after 10 minutes c Piping temperature of the outdoor heat exchanger maintain below defrost starting temperature for 4 minutes after 35 minutes continuous operation d In case of passing 10 minutes after oil recovery operation 2 Outdoor piping temperature...

Page 19: ...door unit turn OFF and Hot Gas bypass Oil separator valve turn ON NOTE Comp frequency and EEV pulse is different each models Control algorithm of defrost completion 1 Frequency of compressor lowering to 30 Hz and maintain constant speed operation with 30 Hz for 75 seconds and then stating operation If the constant speed compressor is OFF it will be receive OFF signal after 5 sec onds from the arri...

Page 20: ...ing power relay on 5 7 Inverter 1 The single phase power AC is converted into DC 2 The single phase power DC is converted into a three phase chopped DC voltage with a variable frequency 3 When the frequency changes the rotation speed of the compressor changes resulting in an changed refrigerant circu lation This leads to changeable amount of the heat exchange per unit 3Ø Comp Motor U U V W V W ...

Page 21: ... operating frequency is limited according to the heat sink thermistor refer to below FIG It will blink 4 times when the thermistor is open or short also when the temperature is over T off T off C T2 C Heat Sink Temp T1 C T on C COMP Freq Free OFF Free Fc 1 Fc 1 Fc 2 Fc 2 T T off T on 3 T1 T on T T2 T on 2 T T on 85 C 185 F Model by Model T off 95 C 203 F Model by Model NOTE Some Models are differe...

Page 22: ...tation on compressor frequency b T2 heat sink temperature Toff Compressor frequency down by 5 Hz c Heat sink temperature Toff Compressor will be off System will stop if this situation occurs 5 times in 1 hour and error code will be generated also self diagnosis will start If high temperature situation occurs 5 times in 1 hr system counts 1 error and after that 4 times if this situation occurs syst...

Page 23: ...if operating current is below I1 for 60 seconds continuously the operating frequency of compressor increases by 1step 2 CT2 control If the operating current of the appliance reaches I2 the compressor stop instantly and two minutes later the compres sor restarts again If CT2 occurs 5 times within one hour the appliance turn off and displays ERROR CODE 7 I1 Current of operating frequency down 5 5A 1...

Page 24: ...Hz Step down 10Hz from current step If new Hz is below cooling Fc min heating Fh min then turn off the compressor b After step down if the total current exceed 1 for more than 5 sec then step down 1 more step c If the current continue below 1 for more than 1 min return the Hz to setting Hz 4 CT 2 detection a If total current exceeds CT2 turn off compressor And after 3 min turn on the compressor an...

Page 25: ...Fan Lock If this problem occurs 5 times within 1 hour in case of the temperature of outdoor pipe TH is over 65 C 149 F while the compressor is operating the appliance turns off and displays Error Code 6 9 12kBtu h Model Error Code 61 18 24 30kBtu h Model 5 11 Discharge Pipe Temp Control 5 11 1 9 12kBtu h Model If the temperature of the discharge pipe of compressor reaches over 130 C 266 F or below...

Page 26: ...harge pipe temperature T1 No limitation on compressor frequency b T2 discharge pipe temperature T off Hysteresis control Compressor frequency down by 5Hz and expan sion valve up by 10 pulse in every 1 min c Discharge pipe temperature Toff Compressor will be off System will stop if this situation occurs 5 times in 1 hour and error code will be generated Expansion valve 10 Pulse Up 10 Pulse Up COMP ...

Page 27: ...ipe temperature T1 Compressor ON EEV on time control b T2 discharge pipe temperature Toff Hysteresis control Expansion valve up by ßpulse every 1 min If EEV is in the starting control it will follow it as it is c Discharge pipe temperature Toff Compressor will be OFF System will stop if this situation occurs 5 times in 1 hour and error code will be generated Error Code 33 COMP Step ON D Pipe temp ...

Page 28: ...ol Comp Freq Outdoor fan On On Off Off Outdoor temp 10 C 14 F 5 23 F 0 32 F 5 41 F 10 50 F 15 59 F 20 68 F 25 77 F 0 50 100 150 200 Time Min Temp C Outdoor fan On Off control Cond temp 5 12 2 18 24 30kBtu h Model Low ambient cooling case In this situation outdoor fan works in ON OFF control If the pipe temperature 0 C 32 F and it is falling rapidly in that case compressor will run for 5 min then i...

Page 29: ...ontrol stop this operation Operating process Raise the operating HZ up to 70 and after 20 sec option recover to the last value 5 13 Oil return control 30kBtu h Model 5 13 1 Operating Contion 1 When the continuous running time is over 3hr option oil returning operation is made for 3min In case of the initial operation oil returning operation is made after completing initial operation 2 After defros...

Page 30: ...30 Room Air Conditioner Part 3 Test Run 1 Check before Test Run 31 2 Test Run Flow chart 32 3 Test Run Detail 33 ...

Page 31: ...ground Do not operate in the case of 2 0 MΩ or less NOTE Never carry out mega ohm check over terminal control board Otherwise the control board may break 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 MΩ as a result of refrigerant accu...

Page 32: ...art4 5 Cycle part No Is hot air discharged After Hot Start NOTE When outdoor temperature is low the unit is operated to Heating mode Yes No Is there any temperature difference between intake and discharged air Yes No Is the operating current normal Yes Normal Refer to Troubleshooting Guide No Check the load In Out Temp Check pipe length and amount of refrigerant Check for abnormal sound in outdoor...

Page 33: ...ce between the intake temperature and the discharge is more than 8 C 46 F Cooling or Heating 4 For reference the gas side pressure of optimum condition is as below Cooling Bolt Tubing connection Discharge temperature Discharge air Intake temperature R22 35 C 95 F 4 5kg cm2 G 56 8 71 0 P S I G R410A 35 C 95 F 8 5 9 5kg cm2 G 120 135 P S I G Outside ambient TEMP Refrigerant The pressure of the gas s...

Page 34: ... Shooting 1 2 Way 3 Way Valve 35 2 Pumping Down 36 3 Evacuation All amount of refrigerant leaked 37 4 Gas Charging After Evacuation 38 5 Self diagnosis Function 39 6 Cycle Troubleshooting Guide 42 7 Electronic Parts Troubleshooting Guide 44 ...

Page 35: ...fold gauge Open Open Open with charging cylinder Open Open Open with charging cylinder Open Open Open Open Works Shipping Air purging Installation Operation Pumping down Transfering Evacuation Servicing Gas charging Servicing Pressure check Servicing Gas releasing Servicing 1 2 3 4 5 6 Valve cap Open position Closed position Pin Service port Service port cap To outdoor unit Flare nut To piping con...

Page 36: ... 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 cm2 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 cm2 g 8 Disconnect the charge s...

Page 37: ...on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approxima tely 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Lo Open Open Vacuum pump 3 Way valve Outdoor unit Liquid side Indoor unit Gas side 3 Way valve OPEN Vacuum Gage OPE...

Page 38: ...he 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 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping part...

Page 39: ...rence 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 temperature difference is larger NOTICE Temp difference approx 0 C 1 F Current less than 80 of rated current Temp difference approx 8 C 16 F Current less than 80 of rated current Temp difference less tha...

Page 40: ...he thermometer to the low pressure tubing and wrap it with putty NOTICE Suction pressure Temperature Compared with Compared with Cause of Trouble Description the normal value the normal value High Defective compressor Current is low Normal Excessive amount of High pressure does not quickly refrigerant rise at the beginning of operation Insufficient amount of Current is low Lower Higher refrigerant...

Page 41: ...O K Check CN DISP1 Check the voltage of power AC 208 230V 60Hz The voltage of main power The voltage applied to the unit The connecting method of Indoor Outdoor connecting cable each color The P W B Ass y Fuse Noise Filter Power Module SMPS IC01D IC04D Trouble 1 NO YES The operation check of the P C B Ass y Procedure Specification 1 The input voltage of Power Module SMPS 2 The output voltage of Po...

Page 42: ...e remote controller When operated in the Sleeping Mode the wind speed is set to the low speed as force Caused by the remote controller Caused by other parts except the remote controller When the mark is displayed in LCD screen replace battery Check the contact of CN DISP 1 2 connector Check DISP P C B Ass y Voltage between CN DISP1 DC 5V Check point Check the connecting circuit between MICOM PIN a...

Page 43: ...k the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange EVA When displaying Error code refer to the trouble shooting guide Check the main power source AC 208V 230V Check the trouble shooting guide error code 6 9 Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1 C ...

Page 44: ... attatched as close as to be effected by the themperature of Heat Exchange EVA When displaying Error code refer to the trouble shooting guide 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 Operate Cooling Mode by setting the disired temperature of the remote controller is less th...

Page 45: ...FAN Check the Fan Motor Check the Fuse AC250V T2A Turn on the main power Check the related circuit of indoor Fan Motor The pin No 38 of micom and the part for driving SSR Q01M Check the related pattern Check the SSR SSR Open Indoor Fan Motor never operate SSR short Indoor Fan Motor always operates in case of ON or OFF The voltage of Pin No 1 orange and 3 black of CN FAN About AC 160V over About AC...

Page 46: ...de is different from Model 9 12kBtu h Model 1 time 1time 3 sec 2times 2times 3 sec 4times 4times 3 sec 5times 5times 3 sec 6times 6times 3 sec 7times 7times 3 sec 3 sec 3 sec 2times 3 sec 2times 3 sec 1time 3 sec 1time 3 sec 1time 3 sec 1 2 4 5 6 7 Error Indicator Error Code Cause of Error Display Indoor Outdoor Indoor Operation O O O O O O O O O O O O O O O O Indoor Temp sensor error Sensor open ...

Page 47: ...REEN Case of error LED02G Green LED01G Red Contents Error code Compressor malfunction IPM Fault Current is 14A DC Link volt Is 140V Low High press switch OPEN Abnormal AC volt Input Off Off Off IPM Fault Compressor Over current CT 2 Max Current DC Link Low Volt Low High press AC Low AC High Volt DC Compressor Position PSC Fault DC Link High Volt Discharge Pipe Temp High INV Discharge Pipe Temp Hig...

Page 48: ... open short Air sensor open short Cond Pipe sensor open short Suction pipe sensor open short D pipe sensor Cons open short Over capacity Communication Indoor Outdoor EEPROM check sum Cond Pipe sensor temp high Heat sink sensor temp high Heat sink sensor open short 40 41 44 45 46 47 51 53 60 61 62 65 Off Off Off Off Off Off Off Off Off Off Off Off Outdoor Status 4 times 4 times 4 times 4 times 4 ti...

Page 49: ...ance of TH air about 10kΩ at 25 C 77 F pipe about 5kΩ at 25 C 77 F YES No Check soldering state of R01H R04H C01H C02H Check flow 2 Outdoor TH sensor is short or open Outdoor TH sensor is not connected to the outdoorpcb assembly Damage or defect on the sensing circuit of outdoorpcb assembly R03H R06H C02H C03H Outdoor TH is short or open Description Error code Error code Cause of error Outdoor TH ...

Page 50: ...Heat sink Temp is over 95 C 203 F Heat sink TH is open or short Heat sink TH in INV IC is Right Sensing circuit of outdoor pcb is right YES No Check heat sink TH Measure resistance of TH about 10kΩ at 25 C 77 F Heat sink TH is connected to outdoor PCB assembly YES No Connect to CN TH2 in outdoor PCB assembly No Check soldering state of R01H R02H C01H Check flow Description Cause of error Error cod...

Page 51: ... in outdoor about AC 208 230V YES No Indoor Outdoor 1 BR 1 BR 2 BL 2 BL 3 GN YL 3 GN YL 4 RD 4 RD No Check power connector Is not connected to the T Block in indoor unit Check flow Is the voltage of GND DC5V in Outdoor pcb about DC 5V YES No Check FUSE NF01 02J PTC Power Module BD 01S in Outdoor pcb assembly Communication circuit of indoor outdoor pcb Is right YES No Check IC01K IC02K D01K D03K ZD...

Page 52: ... YES No Check power source No Check CN U V W connector U RD V BL W YL Check flow Refrigerant pressure is right YES No Check refrigerant pressure and adjust Is the compressor right YES No Check resistance Between U V V W U W port Short Open circuit Comp motor coil error normal 1 2Ω Between U V W and Body normal over 10MΩ Inverter components in outdoor pcb assembly are right YES No 9 K 12K Model Che...

Page 53: ...mally YES No Check power source No Check indoor outdoor fan and adjust Check flow Refrigerant pressure is right YES No Check refrigerant pressure and adjust Current sensing circuit is right YES No Check current sensing circuit check CT is damaged in outdoor pcb output wire is disconnected to pin or not BD01N is inserted in right position refer marking on pcb and component Spec of R01N 1kΩ R02N 1 6...

Page 54: ... Driving circuit Soldering state Direction R01F R09F C01F C03F IC01F IC03F Q01F Q02F ZD01F 9 Outdoor fan is locked by an obstacle ex branch of tree bar etc Fan connector is not connected to outdoor pcb assembly Defective in DC fan driving circuit Outdoor fan is locked BLDC fan model only Outdoor fan is rotating 1 Outdoor fan is rotating 2 YES No Check outdoor unit remove obstacles in outdoor unit ...

Page 55: ... outdoor pcb assembly D Pipe TH is short or open D_PIPE TH is connected to Outdoor pcb assembly D_PIPE TH is right YES No Connect to CN D_PIPE in outdoor pcb assembly Sensing circuit of outdoor pcb is right No Check D_PIPE TH Measure resistance of TH about 200kΩ at 25 C 77 F YES No Check soldering state of R07H R08H C04H Check flow Description Cause of error Error code ...

Page 56: ...C 77 F plugged Normal resistor 5kΩ at 25 C 77 F Unplugged Normal voltage 2 5VDC at 25 C 77 F plugged Error code Title Cause of error Check point Normal condition Check Point 1 Unplug the sensor on Indoor unit PCB 2 Estimate the resistance of each sensor 3 If the resistance of the sensor is 10kΩ 5kΩ at 25 C 77 F then sensor is normal 4 If the resistance of the sensor is 0 kΩ or then sensor is abnor...

Page 57: ...B is abnormal Error code Title Cause of error Check point Normal condition Check Point 1 Check the input power AC 208 230V Outdoor Indoor unit 2 Check the communication wires are correctly connected Adjust the connection of wire Confirm the wire of Live Neutral 3 Check the resistance between communication line and GND Normal Over 2MΩ 4 Check the connector for communication is correctly connected 5...

Page 58: ... current in the U V W phase Comp lock The abnormal connection of U V W Over load condition Overcharging of refrigerant Pipe length Poor insulation of compressor Error code Title Cause of error Check point Normal condition Check Point 1 Check the wire connection U V W 2 Check the load condition Refrigerant Pipe length Adjust the load condition 3 Check the electricity leakage of the compressor Norma...

Page 59: ...ing of pipe Low voltage input Refrigerant pipe length blocked Malfunction of current detection circuit Open Short The voltage of C01N is 4 0VDC 25A Error code Title Cause of error Check point Normal condition Check Point 1 Check the power source 2 Check the fan operation is right 3 Check the current 4 Check the install condition 5 Check the internal circuit C T Diode Resistor ...

Page 60: ...e DC Link High voltage DC link volt is 140VDC DC link volt is 420VDC Check the power source Check the components Check the power source Check the components Error code Title Cause of error Check point Normal condition Check Point 1 Check the power source 2 Check the components B Diode Reactor PSC Parts ...

Page 61: ...C Check the connection of CN_Press Check the components Check the power source Check the components Error code Title Cause of error Check point Normal condition Check Point CH 24 1 Check the connection of CN_PRESS 2 Check the install condition for over load 3 Check the SVC V V open 4 Check the leakage of refrigerant CH 25 1 Check the power source 2 Check the components Trans1 B Diode Diode Resista...

Page 62: ...tion of comp wire U V W Malfunction of compressor Check the component of IPM detection parts Check the component of IGBT Check the components Error code Title Cause of error Check point Normal condition Check Point CH 26 1 Check the connection of U V W 2 Check the insulation of IPM part 3 Check the compressor same with CH21 CH 27 1 Check the component of IGBT 2 Check the components IGBT R04S NF1 B...

Page 63: ... over load Check the leakage of refrigerant Check the SVC V V open Check the discharge pipe sensor for Cons Check the install condition for over load Check the leakage of refrigerant Check the SVC V V open Normal resistor about 0Ω Error code Title Cause of error Check point Normal condition Check Point CH 32 1 Check the install condition for over load 2 Check the SVC V V open 3 Check the leakage o...

Page 64: ...mal voltage 4 5VDC at 25 C 77 F plugged Normal resistor 10kΩ at 25 C 77 F Unplugged Normal voltage 2 5VDC at 25 C 77 F plugged Normal resistor 5kΩ at 25 C 77 F Unplugged Normal voltage 2 5VDC at 25 C 77 F plugged Normal resistor 5kΩ at 25 C 77 F Unplugged Normal voltage 2 5VDC at 25 C 77 F plugged Normal resistor 200kΩ at 25 C 77 F Unplugged Normal voltage 4 5VDC at 25 C 77 F plugged Normal resist...

Page 65: ...Combination Check sum error Check the indoor unit capacity Check the combination table Check the PCB ASM P No Check the poor soldering Display code Title Cause of error Check point Normal condition Check Point CH 51 1 Check the indoor unit capacity CH 60 1 Check the insertion condition of EEPROM 2 Check the poor soldering ...

Page 66: ...5 C 185 F Check the load condition Check the sensor of Condenser pipe sensor Check the fan is locked Check the sensor of heat sink Display code Title Cause of error Check point Normal condition Check Point CH 61 1 Check the install condition for over load Refrigerant Pipe length Blocked CH 62 1 Check the fan is locked 2 Check the Outdoor temp is very high COMP Frequency Hz Toff C T1 C T2 C OFF Nor...

Page 67: ...P NO MFL41161601 AUGUST 2007 ...

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