SERVICE MANUAL
19
www.norcold.com
Troubleshooting, cont’d.
1. Perform the “Diagnostic Pre-Checks.”
2. Remove unit from enclosure, leaving AC power connected. Have any wires become disconnected from their terminals?
■
Yes: Reattach wires and test unit; refer to the wiring diagram.
■
No: Go to the
fl
ow chart below.
Troubleshooting Test B - Not Cooling On DC
Is selector
switch in the
DC position?
Is circuit breaker
or fuse blown?
(DC source)
Are any wire
connections
loose?
Turn selector
switch to DC
and start up.
Reset breaker/
replace fuse
and start up.
Repair
connections
and start up.
YES
YES
YES
YES
NO
NO
NO
NO
NO
YES
Is DC voltage
at terminal
block?
Correct power
source to
terminal block.
NO
Is DC voltage
at input of
20 Amp fuse?
Correct power
source to
20 Amp fuse.
NO
Replace 20 Amp
fuse and
start up.
NO
NO
YES
YES
YES
YES
Is DC voltage
at output of
20 Amp fuse?
Is DC voltage
at input of
selector switch?
Correct power
source to
selector switch.
Is DC voltage
at output of
selector switch?
Replace
selector switch
and start up.
Replace
DC heater.
Is DC voltage at
input of heater?
(yellow wires)
Correct power
source to heater
and start up.
Refrigerator will not operate on DC.
Art00998
