LG AMNW07GDBL1 Service Manual page 102

Display
Title
code
Heatsink High error
62
■ Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal ?
Yes
Is assemble condition
of INV PCB heatsink normal ?
Yes
Is PCB temperature
sensing part normal ?
Yes
Recheck installation condition
and connection of Heat sink
Check Point
1. Check resistance between No.19 pin and NO.20 pin of PCB PFC module
2. Check resistance between No.24 pin and NO.25 pin of PCB PFC module - only 48/56k
3. Resistance value should be in 7kΩ ±10%.(at 25°C).
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Cause of error
Inverter PCB heatsink
temperature is over 85°C
1. Check fan locking
2. Check covering of heat exchanger
3. Check distance between ODU and obstacles
No
4. Check pipe distortion and abnormality
5. Check service valve is opened
→ Eliminate causes for abnormal condition
Check assemble condition between INV PCB heatsink and
No
PFC & IPM module → Reassemble if abnormality found
Check resistance between NO.19 pin and NO.20 pin
of PFC module
No
Check resistance between NO.24 pin and NO.25 pin
of PFC module
→ 7KΩ10%(at 25°C)
→ Replace PCB if abnormality found
- 101 -
Part 5. Trouble Shooting
Check point & Normal condition
1. ODU fan locking
2. Heatsink assembly of INV PCB assemble condi-
tion abnormal
3. Defect of temperature sensing circuit part defect
of INV PCB
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