LG Therma V AHBW Series Service Manual page 88

Display
Title
code
Heatsink High error
62
n Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal ?
Yes
Is assemble condition
of INV PCB(Inverter)
heatsink normal ?
Yes
Is PCB(Inverter) 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. Resistance value should be in 7kΩ ±10%.(at 25°C).
<Check the PFCM>
Cause of error
220-240 V~ 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(Inverter)
No
heatsink and PFC & IPM module → Reassemble if
abnormality found
Check resistance between NO.19 pin and NO.20 pin
No
of PFC module
→ Replace PCB(Inverter) if abnormality found
- 88 -
Check point & Normal condition
1. ODU fan locking
2. Heatsink assembly of PCB assembly 1 condition
abnormal
3. Defect of temperature sensing circuit part defect
of INV PCB(Inverter)