Electrolux KSV26HRC Diagnostic Manual page 21

IPM Protection Continues:
# Check for >100V-DC between the following points:
Negative DC & positive DC-U
Negative DC & positive DC-V
Negative DC & positive DC-W
If >100V-DC is not available at each of the above test points, replace the main outdoor PCB.
Negative & Positive DC test points on main outdoor PCB.
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