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LG Electronics A3UH363FA0, A3UC363FA0, AMNH093D4A0, AMNC093D4A0, AMNH123DEA0, AMNC123DEA0, AMNH093APM0, AMNC093APM0, AMNH123APM0, AMNC123APM0, AMNH093D4A0, AMNC093D4A0, AMNH123DEA0, AMNC123DEA0, AMNH093APM0, AMNC093APM0, AMNH123APM0, AMNC123APM0, A3UH363FA0, A3UC363FA0 Error Code

1 86

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72 Multi type Air Conditioner

Troubleshooting Guide

Error Code

■Trouble Shooting

Error Title Cause of error Check point & Normal condition

code

01 Indoor air sensor

02 Indoor inlet pipe sensor

06 Indoor outlet pipe sensor

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

Normal resistor : 10KΩ/ at 25°C (Unplugged)

Normal voltage : 2.5Vdc / at 25°C (plugged)

Normal resistor : 5KΩ/ at 25°C (Unplugged)

Normal voltage : 2.5Vdc / at 25°C (plugged)

Normal resistor : 5KΩ/ at 25°C (Unplugged)

Normal voltage : 2.5Vdc / at 25°C (plugged)

Ω

10KΩ2.5Vdc

Check the resistance / voltage

V

❑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/5KΩat 25°C, then sensor is normal

4. If the resistance of the sensor is 0 KΩor ∞, then sensor is abnormal. ➔Change the sensor.

5. Plug the sensor on Indoor unit PCB and Power ON.

6. Estimate the voltage of each sensor.

7. If the voltage of the sensor is 2.5Vdc / at 25°C, then sensor is normal.

8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ➔Repair or Change the PCB

Contents

Main LG Multi Type Air Conditioner CAUTION SERVICE MANUAL LG website http://www.lgservice.com TABLE OF CONTENTS Service Manual 3 Model Number Nomenclature AMN H 3 Model Number Nomenclature Indoor Unit Outdoor Unit 09 4DA0 A3U H 336 F A 0 Symbols Used in this Manual Combination table NOTICE Safety Precautions WARNING CAUTION Installation WARNING Page Page CAUTION Installation Operational Page Service Manual 11 Dimensions Dimensions 1. Split Type Indoor 2. Art Cool Type Indoor Unit 12 Multi type Air Conditioner Outdoor Unit Dimensions Service Manual 13 Product Specifications Product Specifications Indoor Unit 14 Multi type Air Conditioner Outdoor Unit - Multiple piping models Product Specifications Installation Read carefully, and then follow step by step. Installation Parts Installation Tools 16 Multi type Air Conditioner Select the best location Service Manual 17 Piping length and elevation Multi Piping Type Fixing Installation Plate(Standard Type) Service Manual 19 Preparing work for Installation (Artcool Type Only) Open panel front Remove cover pipe and cover side Drain hose junction 20 Multi type Air Conditioner INSTALLA TION GU Drill a hole in the wall Flaring Work and Connection of Piping Service Manual 21 Flaring work Cut the pipes and the cable. Burrs removal Connecting the Piping For right rear piping Page 24 Multi type Air Conditioner For left rear piping Page Page Page 28 Multi type Air Conditioner REMOTE CONTROL PREPARATION(OPTIONAL) Service Manual 29 Outdoor Connecting the Cable between Indoor Unit and Outdoor Unit Connect the cable to the Indoor unit. Line voltage (208~230V) Low voltage (below 40V) Connect the cable to the Outdoor unit. Outdoor unit 32 Multi type Air Conditioner How to connect wiring to the terminals Strand wire Connection method of the connecting cable(Example) High voltage Connect the cable to the indoor unit Service Manual 33 CAUTION: Provide a circuit breaker between power source and the unit as shown below. Checking the Drainage, Forming the Pipings and Long Pipe Setting Checking the drainage Forming the piping Air Purging and Evacuation Checking method Service Manual 37 Checking the Drainage, Forming the Pipings and Long Pipe Setting Evacuation Finishing the job : Repeat evacuation procedure for each indoor unit. NOTICE 38 Multi type Air Conditioner Charging Service Manual 39 Test Running Split, Art Cool Type Test Running 40 Multi type Air Conditioner Operation Operation Function of control 1. MAIN UNIT FUNCTION DISPLAY Cooling Mode Operation Service Manual 41 Operation Defrost Control(Heating) Fuzzy Operation 42 Multi type Air Conditioner Operation Airflow Speed Selection On-Timer Operation Off-Timer Operation Page 44 Multi type Air Conditioner Operation Forced Operation Buzzer Sounding Operation Service Manual 45 Operation Function of Indoor Unit Indoor Unit 46 Multi type Air Conditioner Operation Art Cool Type Indoor Unit Service Manual 47 Operation Function of Outdoor Unit Outdoor Unit Remote Control Operation Operation Mode Disassembly Page Service Manual 51 Disassembly 5.To remove the Motor Cover 6.To remove the Cross-Flow Fan Page Service Manual 53 Disassembly Page Service Manual 55 Schematic Diagram 2) Art Cool Type FG2 ~ FG1 Page Page Page Components Locations Page Page Page Page Cooling OUTDOOR UNIT OUTDOOR UNIT 1. A3UH363FA0(LMU360HE) Troubleshooting Guide Refrigeration Cycle Diagram Service Manual 65 Self-diagnosis Function LED1 LED2 Indoor Error Outdoor Error Cycle Troubleshooting Guide Trouble analysis Electronic Parts Troubleshooting Guide The Product doesnt operate at all. Trouble 1 Product doesn't operate with the remote controller. Trouble 2 The Compressor/Outdoor Fan are don't operate Trouble 3 When indoor Fan does not operate. When indoor Fan does not operate. Trouble 4 When the louver does not operate. Trouble 5 When Vertical Louver does not operate. 72 Multi type Air Conditioner Error Code Check the resistance / voltage Page Page Service Manual 75 Check the resistance 2-way, 3-way Valve Service Manual 77 (1) Pumping down 78 Multi type Air Conditioner (2) Evacuation Procedure Service Manual 79 (3) Gas Charging Procedure 80 Multi type Air Conditioner Exploded View & Replacement Parts List S4, SE chassis Service Manual 81 Parts List (S4, SE chassis) 82 Multi type Air Conditioner SP3 Chassis Art Cool Type Service Manual 83 Parts List (SP3 chassis) Outdoor Unit 84 Multi type Air Conditioner A3UH363FA0(LMU360HE), A3UC363FA0(LMU360CE) Service Manual 85 Parts List (A3UH363FA0(LMU360HE), A3UC363FA0(LMU360CE))