LG Multi V5 Service Manual page 167

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Table 81: Error No. 52 Checkpoint Details.
Cause Check
Check 15V Voltage
(Inverter connector)
Inverter 5V, 15V
Voltage Abnormal
Check 5V Voltage
(Inverter connector)
Check Inverter PCB
Appearance
Inverter PCB
Measure 5V,15V line
Damaged
IGBTM (Check IGBT)
Inverter Drive circuit
(Check diode)
Check Fan PCB
Appearance
Check Fuse
Fan PCB
Measure 5V,15V line
Damaged
IPM (Check IGBT)
Inverter Drive circuit
(Check diode)
Check Point
Voltage
Voltage
Appearance
5V, 15V Resistance
P-U,V,W / N-U,V,W
Diode
Appearance
Fuse
5V, 15V Resistance
P-U,V,W / N-U,V,W
Diode
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
Checklist
Normal Abnormal
14.5V~15.5V
4.5V ~ 5.5V
Good Damage
0.38V ~ 0.7V Non-normal
0.38V ~ 0.7V Non-normal
Good Damage
Short Open
0.38V ~ 0.7V Non-normal
0.38V ~ 0.7V Non-normal
Error No. 52, continued.
App.
Defective
Parts
A2
SMPS PCB
(Power ON)
B1
Inverter PCB
(Power Off)
B3
Fan PCB
(Power Off)
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