LG Electronics General Wall Mounted-Inverter Type

34 Room Air Conditioner

Part 4 Trouble 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

Contents

Main CONTENTS Page 1. Safety Precautions 1.1 Cautions in Repair Page 1.2 Inspections after Repair Service Manual 7 Part 1 General Information 2. Nomenclature 2.1 Global Model Name AS W1264GG1 12 - 345678910 Page 1. List of Functions & Controls 2. Basic Mode Controls 2.1 Cooling Mode 2.2 Heating Mode 2.3 Healthy Dehumidification operation 2.4 Automatic operation 2.5 Auto changeover operation 3. Special Mode Controls 3.1 Jet Cool operation 3.2 Jet Heat operation 3.3 Energy saving operation in cooling mode 4. Utility Functions 4.1 Forced operation 4.2 Auto cleaning operation 120 8 4.3 Air volume control NOTE: Some Models are different by swing width and swing pattern. 4.4 Natural Air Control(Auto Wind) 4.5 Chaos Swing LL Very low, In heating mode L Low M Med H High SH Super high Auto Natural wind 4.6 Sleep mode Auto control 4.6.1 Sleep timer operation for cooling cycle 4.6.2 Sleep timer operation for heating cycle 4.7 Auto restart 5.1 Five Seconds Stand-by (fan) 5. Protection Functions & Controls 5.5 Automatic defrost 5.5.1 9,12kBtu/h Model Page Page 5.6 Power Relay Control 5.7 Inverter 5.8 Overheating Protection (Power Module) 5.8.1 9,12kBtu/h Model 22 Room Air Conditioner 5.8.2 18,24,30kBtu/h Model Function Heat sink sensor failure error Heat sink temperature control 5.9 Total Current Control (Over Current Protection) 5.9.1 9,12kBtu/h Model 5.9.2 18,24,30kBtu/h Model 5.10 DC Peak control 5.10.1 DC Peak Current Error by a fault signal of IPM 5.10.2 DC Peak Current Error by the compressor lock 5.10.3 DC Peak Current Error by the Outdoor Fan Lock 5.11 Discharge Pipe Temp Control 5.11.2 Inverter Compressor (18,24,30kBtu/h Model) 5.11.3 Constant Compressor (only 30kBtu/h Model) 5.12 Low Ambient control 5.12.1 9,12kBtu/h Model 5.12.2 18, 24, 30kBtu/h Model 5.14 Oil equalizing control(30kBtu/h Model) 5.13 Oil return control(30kBtu/h Model) 5.13.1 Operating Contion 5.13.2 Operation Process Page 1. Check before Test Run 2. Test Run Flow chart Service Manual 33 Part 3 Test Run 3. Test Run Detail Settlement of outdoor unit Evaluation of the performance Page 1. 2-Way, 3-Way Valve 2. Pumping Down Service Manual 37 Part 4 Trouble Shooting 3. Evacuation (All amount of refrigerant leaked) Vacuum pump Procedure 4. Gas Charging (After Evacuation) Service Manual 39 Part 4 Trouble Shooting Trouble analysis 5. Cycle Troubleshooting Guide NOTICE Service Manual 41 Part 4 Trouble Shooting The Product doesnt operate at all. (9~30kBtu/h Model) 6. Electronic Parts Troubleshooting Guide Trouble 1 42 Room Air Conditioner Part 4 Trouble Shooting Trouble 2 Product doesn't operate with the remote controller. (9~30kBtu/h Model) Trouble 3 Trouble 4 Service Manual 45 Part 4 Trouble Shooting When indoor Fan does not operate.(9~30kBtu/h Model) Trouble 5 46 Room Air Conditioner Part 4 Trouble Shooting 7. Self-diagnosis Function Error Indicator 9, 12kBtu/h Model Service Manual 47 Part 4 Trouble Shooting 18,24,30kBtu/h Model Indoor Error Contents Case of error Outdoor Error Case of error LED02G (Green) Contents LED01G (Red) Error code Troubleshooting Guide(9,12kBtu/h Model) Page Service Manual 51 Part 4 Trouble Shooting Error code Description Cause of error Earth port V U W Page 8 Description Cause of error Error code Description Cause of error Indoor fan is locked (BLDC fan model only) 10 56 Room Air Conditioner Part 4 Trouble Shooting 1) Troubleshooting CH01, CH02, CH06 Troubleshooting Guide(18,24,30kBtu/h Model) 2.5VDC 10k Check the resistance Check the voltage Service Manual 57 Part 4 Trouble Shooting 2) Troubleshooting CH05, CH53 58 Room Air Conditioner Part 4 Trouble Shooting 3) Troubleshooting CH21 Service Manual 59 Part 4 Trouble Shooting 4) Troubleshooting CH21, CH22 + - +- +- 60 Room Air Conditioner Part 4 Trouble Shooting 5) Troubleshooting CH23, CH28 Service Manual 61 Part 4 Trouble Shooting 6) Troubleshooting CH24, CH25 62 Room Air Conditioner Part 4 Trouble Shooting 7) Troubleshooting CH26, CH27 Service Manual 63 Part 4 Trouble Shooting 8) Troubleshooting CH32, CH33, CH40 64 Room Air Conditioner Part 4 Trouble Shooting 9) Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Service Manual 65 Part 4 Trouble Shooting 10) Troubleshooting CH51, CH60 66 Room Air Conditioner Part 4 Trouble Shooting 11) Troubleshooting CH61, CH62