Drive Test:
Passed?
Run Drive Diagnostic Test
Passed: No Fault
Test Response 3:
Cmpr Lead/Winding
Short
Test Response 4:
Cmpr Lead/Winding
Open
Test Response 5:
Compressor Rotor
Malfunction
Test Response 2:
Drive HW
Malfunction (In-
rush/PFC Fault)
Test Response 1:
No Fault Found
Yes
No
Run Drive Diagnostic Test
First Time
through drive
test?
Y
es
No
If Ambient > 85,
disconnecting dome sensor
will force pre-heat.
Verify that pre-heating is functional with System idle.
A good way to verify sump heat is on is to monitor
compressor watts from the CDA on the U, V & W
currents. One leg will have twice the current of the
Manual
Procedure
Wait 12 hours for pre-heat to
move liquid refrigerant out of
compressor or remove
Replace
Drive
Replace
Compressor
Go To
“Compressor
Verification: Open”
Troubleshooting
Flow Chart
Go To
“Compressor
Verification: Short
or Earth Fault”
Troubleshooting
Flow Chart
+VDC -VDC
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.
400 VOLTS
WARNING
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