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Compressor Verification: Open
WARNING
400 VOLTS
ELECTRICAL
HAZARD
Failure to follow this
warning could result in
personal injury or death.
WAIT TWO (2) MINUTES
after disconnecting power prior
to touching electrical
components as they may hold
a dangerous charge
of 400VDC, then verify DC
Voltage is less than 42 VDC
at inverter test points
labeled +VDC and -VDC before
servicing board.
+VDC
-VDC
Visually Inspect
Connection Points:
Drive Side
Connections
Good?
Yes
Replace
Drive
4TWL9048A-SF-1C-EN
Compressor Verification:
Disconnect compressor wire
harness from drive and manually
check resistance leg-to-leg
No
Open?
No
Repair or Replace
Harness
Open
Yes
Isolate harness. Check for
continuity of harness leads
No
Verify Compressor
Windings Open
Replace
Compressor
For reference: resistance
should be 0.02-0.03 Ohmns
Open?
Yes
Repair or Replace
Harness
39
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