Page 2 - Air Conditioner Service Manual; CONTENTS; Part 1 General Information
- 2 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Air Conditioner Service Manual CONTENTS Part 1 General Information 1. Safety Precautions ...........................................................................................
Page 4 - Safety Precautions; Cautions in Repair; Be sure to follow the instruction.
- 4 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 1 General Information 1. Safety Precautions 1.1 Cautions in Repair To prevent injury to the user or other people and property damage, the following instructions must be fol...
Page 6 - Inspections after Repair
- 6 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 1 General Information 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...
Page 7 - Global Model Name
- 7 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 1 General Information 2. Nomenclature 2.1 Global Model Name Code Type Code of Model Meaning 1 Production Center, A~Z L: Chang-won R22 Refrigerant A: Chang-won R410A 2 Produ...
Page 8 - Part 2 Functions & Controls
- 8 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 2 Functions & Controls 1. List of Controls & Functions ..........................................................................................9 2. Basic Mode Con...
Page 10 - Basic Mode Controls
- 10 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 2 Functions & Controls 2. Basic Mode Controls 2.1 Cooling Mode SettingTemp. -0.5 ° C(-1 ° F) +0.5 ° C(1 ° F) Comp. OFF Thermo ON Thermo OFF INV. Comp.Frequency Low Hig...
Page 11 - Healthy Dehumidification operation; Auto changeover operation
- 11 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 2 Functions & Controls 2.3 Healthy Dehumidification operation • When the dehumidification operation is set by the remote controller, the intake air temperature is dete...
Page 12 - Special Mode Controls; Jet Cool operation; Jet Heat operation
- 12 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 2 Functions & 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...
Page 13 - Auto cleaning operation
- 13 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 2 Functions & Controls 4. Utility Functions 4.1 Forced operation • To operate the appliance manually in case when the remote control is lost, the forced operation sele...
Page 14 - Air volume control; Sleep timer operation for cooling cycle
- 14 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Setting temp. (˚C) 1.0˚C(2˚F) up 1.0˚C(2˚F) up 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) Part 2 Functio...
Page 15 - Sleep timer operation for heating cycle
- 15 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 2 Functions & Controls 4.6.2 Sleep timer operation for heating cycle • While in heating mode, 60 min. after the start of the sleep timer, the setting temperature decre...
Page 16 - Part 3 Test Run
- 16 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 3 Test Run Part 3 Test Run 1. Check before Test Run...................................................................................................17 2. Test Run Flow c...
Page 17 - Check before Test Run
- 17 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 3 Test Run Check to see whether there is any refrigerant leakage, and check whether the power or transmissioncable is connected properly. Check whether the liquid pipe and...
Page 18 - Yes; Test Run Flow chart
- 18 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 3 Test Run Is cold air discharged for more than 3 minutes ? START Test operation for indoor unit Operation mode change to Heating mode Operate the unit in cooling mode. Do...
Page 19 - Settlement of outdoor unit; Evaluation of the performance
- 19 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 3 Test Run 1. Check that all tubing and wiring have been properly con- nected. 2. Check that the gas and liquid side service valves are fully open. Settlement of outdoor u...
Page 20 - Part 4 Trouble Shooting
- 20 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting Part 4 Trouble Shooting 1. 2-Way, 3-Way Valve ........................................................................................................21...
Page 22 - • Procedure
- 22 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting • 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...
Page 23 - Vacuum pump
- 23 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting • Procedure (1) Connect the vacuum pump to the center hose of charge set center hose (2) Evacuation for approximately one hour. – Confirm that the gauge...
Page 25 - Trouble analysis; NOTICE; Cycle Troubleshooting Guide
- 25 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting Trouble analysis 1. Check temperature difference between intake and discharge air, and operating current. All amount of refrigerant leaked out. Check re...
Page 26 - Trouble 1; Electronic Parts Troubleshooting Guide
- 26 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting 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. D...
Page 27 - Product doesn't operate with the remote controller.; Trouble 2
- 27 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting Turn on main power. While the compressor has been stopped, the compressor does not operate owing to the delaying function for 2 minutes after stopped. W...
Page 28 - The Compressor/Outdoor Fan don't operate; Trouble 3
- 28 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only 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 Out...
Page 29 - When indoor Fan does not operate; Trouble 4
- 29 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting When indoor Fan does not operate Trouble 4 Check the SSR high speed operation by remote control. (the Indoor Fan Motor is connected) Turn off main power...
Page 30 - Error Indicator
- 30 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting 7. Self-diagnosis Function ■ Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any ...
Page 31 - Outdoor Unit Error
- 31 - Copyright ©2009 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only Part 4 Trouble Shooting ■ Outdoor Unit Error 1) 2 LED Type Red LED LED2(Red, 10 Digit) LED1(Green, 1 Digit) 2sec 2sec 2sec 2sec 1sec 1sec 1sec 1sec Ex) Error Code 21 (DC Peak) ...