LG Multi-Inverter Service Manual page 97

4. Trouble Shooting
Display
Title
code
62 Heatsink High error
I 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 ?
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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Only for training and service purposes
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
¡ 7KΩ ±10%(at 25°C)
¡ Replace PCB if abnormality found
- 96 -
Check point & Normal condition
2. ODU fan locking
3. Heatsink assembly of INV PCB assemble condi-
tion abnormal
4. Defect of temperature sensing circuit part defect
of INV PCB
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