LG Multi V Service Manual

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Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Self-diagnosis function
n Error diagnosis and countermeasure flow chart
n Check Inv. PCB Screw Connection Condition
Error No. Error Type Error Point Main Reasons
62
Inv. PCB Heatsink
Temperature High
Heatsink Temperature
is Over 100 °C
1. Inv. PCB IPM Connection Condition Abnormal
2. Outdoor Unit Fan Motor Operation Abnormal
3. Outdoor Unit Inv. PCB Assembly Defect
4. Overload Operation (Pipe Clogging/ Covering/EEV
Defect/Ref. Overcharge)
Is Installation
Condition Normal?
No
1. Check Pipe Clogging/ Distortion
2. Check Covering (Outdoor/Indoor Unit)
3. Check EEV Connector Assemble Condition/Normal Operation
4. Check Refrigerant Pressure
5. Check Power Wire/ Connection Condition
Reassemble or Manage if abnormality Found
1. Check Inv. PCB Screw Connection Condition
Reassemble or Manage if abnormality Found
No
Inv. PCB IPM Connection
Condition Normal?
Yes
1. Check Outdoor Unit Fan Motor Operation or Lock
Reassemble or Manage if abnormality Found
No
Is ODU Fan Motor Normal?
Yes
1. Reset
Replace Inv. PCB Assembly
No
Is Inv. PCB assembly
Normal?
Yes
Recheck Power and
Installation Condition
Yes
Check Screw Connection Condition

LG Multi V Specifications

General

Type	VRF (Variable Refrigerant Flow)
Compressor Type	Scroll
Refrigerant	R410A
Energy Efficiency	High
Control System	Centralized and individual control options
Indoor Units	Multiple types available (e.g., ceiling cassette, wall-mounted, ducted)