Troubleshooting Test B - Not Cooling On Dc - Norcold N260.3 Series Service Manual

Troubleshooting, cont'd.

Troubleshooting Test B - Not Cooling On DC

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.
Is selector
switch in the
DC position?
YES
NO
Turn selector
switch to DC
and start up.
Replace
DC heater.
YES
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Refrigerator will not operate on DC.
Is circuit breaker
Are any wire
or fuse blown?
connections
(DC source)
loose?
NO
YES
Repair
Reset breaker/
connections
replace fuse
and start up.
and start up.
Is DC voltage at
Is DC voltage
input of heater?
at output of
(yellow wires)
selector switch?
YES
NO
Correct power Replace
source to heater selector switch
and start up.
and start up.
Is DC voltage
at terminal
block?
NO
YES
NO
Correct power
source to
terminal block.
Is DC voltage
at input of
selector switch?
YES
NO
NO
Correct power
source to
selector switch.
19
Is DC voltage
at input of
20 Amp fuse?
YES
YES
NO
Correct power
source to
20 Amp fuse.
Is DC voltage
at output of
20 Amp fuse?
YES
NO
Replace 20 Amp
fuse and
start up.
SERVICE MANUAL