LG Multi V5 Service Manual

167
Error Codes
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. 52, continued.
Cause Check
Checklist
App.
Check Point Normal Abnormal
Defective
Parts
Inverter 5V, 15V
Voltage Abnormal
Check 15V Voltage
(Inverter connector)
Voltage 14.5V~15.5V 9Ļ
SMPS PCB
A2
(Power ON)
Check 5V Voltage
(Inverter connector)
Voltage 4.5V ~ 5.5V 9Ļ
Inverter PCB
Damaged
Check Inverter PCB
Appearance
Appearance Good Damage
Inverter PCB
B1
(Power Off)
Measure 5V,15V line 5V, 15V Resistance NĹ NĻa
IGBTM (Check IGBT) P-U,V,W / N-U,V,W 0.38V ~ 0.7V Non-normal
Inverter Drive circuit
(Check diode)
Diode 0.38V ~ 0.7V Non-normal
Fan PCB
Damaged
Check Fan PCB
Appearance
Appearance Good Damage
Fan PCB
B3
(Power Off)
Check Fuse Fuse Short Open
Measure 5V,15V line 5V, 15V Resistance NĹ NĻa
IPM (Check IGBT) P-U,V,W / N-U,V,W 0.38V ~ 0.7V Non-normal
Inverter Drive circuit
(Check diode)
Diode 0.38V ~ 0.7V Non-normal
Table 81: Error No. 52 Checkpoint Details.

LG Multi V5 Specifications

General

Brand	LG
Model	Multi V5
Category	Air Conditioner
Language	English