3. LED is blinking 7 times (IPM Fail)
U
Ground
19
Cause: IPM with short circuit, defect (burned or damaged).
Purpose: Protection of the over-current caused by IPM with short circuit or defect.
Actions: Visual verification of burned IPM when the compressor is not operation. Check if there’s a short circuit in U, V, o W.
Replace PCB.
U part among 3 compressor phases connectors (CN201)
Ground
Replace PCB
Check
protection
logic
Check IPM Fault or
LED blinking 7
times(IPM Fault)
Compressor is
not activated
Power
reset
Check again
inspection
procedure
Visual
verification of
IPM burn
Check Point A short
circuit IPM output
>80V-20%
Yes
Yes
No
No
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