LG Multi V - Page 95

❈ PFCM Module checking method
Set the multi tester to diode mode.
Check resistance between No.19 pin and No.20 pin
of PCB PFC module
Resistance value should be in 7kΩ ±10%.
(at 25°C(77°F)).
Troubleshooting Guide
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62
Heatsink High error
Error
No.
Error Type Error Point Main Reasons
Inverter PCB heatsink tem-
perature is over 95˚C(203˚F)
1.Overload operation (Pipe clogging/
Covering/EEV defect/Ref. overcharge)
2. ODU fan locking
3. Heatsink assembly of INV PCB assemble
condition abnormal
4. Defect of temperature sensing circuit part
defect of INV PCB
■ Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal ?
No
Yes
1. Check fan locking
2. Check covering of heat exchanger
3. Check distance between ODU and obstacles
4. Check pipe distortion and abnormality
5. Check service valve is opened
→ Eliminate causes for abnormal condition
Check resistance between No.19 pin and No.20 pin of PCB
PFC module
→ 7kΩ ±10% (at 25°C(77°F))
→ Replace PCB if abnormality found
Is assemble condition
of INV PCB heatsink normal ?
Is PCB temperature
sensing part normal ?
No
No
Yes
Check assemble condition between INV PCB heatsink and
PFC module
→ Reassemble if abnormality found
PFCM :
Measuring resistance
between No.19,20 pin
IPM :
Measuring resistance
between No.19,20 pin