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Start Compressor
Yes
Inspect term inal connector
V erification: P aram eters
4TWL9048A-SF-1C-EN
to com pressor for open
circuits
W as a repair of
connection required?
No
G o T o: C om pressor
Drive Current
Failures
Any Error 177 within
30 seconds of operation
B reaker T rip
O ccurs
G o to B reaker T rip
P rocedure
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
35
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