❈ 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)).
Check PFC Module No.19,20 and IPM Module Pin
soldering condition
PFCM :
Measuring resistance
between No.19,20 pin
IPM :
Measuring resistance
between No.19,20 pin
Troubleshooting Guide
- 96 -
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Only for training and service purposes
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65
Heatsink High error
Error
No.
Error Type Error Point Main Reasons
Inverter PCB heatsink sen-
sor is open or short
1. Heatsink assembly of INV PCB assemble
condition abnormal
2. Defect of temperature sensing circuit part
defect of INV PCB
■ Error Diagnosis and Countermeasure Flow Chart
Is assemble condition
of INV PCB heatsink normal ?
No
Yes
Check assemble condition between INV PCB heatsink and
PFC module
→ Reassemble if abnormality found
Is PCB temperature
sensing part normal ?
No
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
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