N260.3, 323
18
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 A - Not Cooling On AC
Is selector
switch in the
AC position?
Is circuit breaker
or fuse blown?
(AC source)
Are any wire
connections
loose?
Turn selector
switch to AC
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 AC voltage
at terminal
block?
Correct power
source to
terminal block.
NO
Is AC voltage
at output of
3 Amp fuse?
Correct power
source to
3 Amp fuse.
NO
NO
NO
YES
YES
YES
YES
Is AC voltage
at input of
selector switch?
Correct power
source to
selector switch.
Is AC voltage
at output of
selector switch?
Replace
selector switch
and start up.
Refrigerator will not operate on AC.
Art00997
Put thermostat
at mid-range or
higher & start up.
Is thermostat
at mid-range or
higher?
Is the power
cord in the
receptacle?
Put the cord in
the receptacle
and start up.
Is AC voltage
at input of
3 Amp fuse?
Replace
3 Amp fuse
and start up.
NO
Correct power
source to heater
and start up.
YES
YES
YES
NO
NO
NO
Replace
thermostat and
start up.
Is AC voltage
at input of
thermostat?
Correct power
source to
thermostat.
Is AC voltage
at output of
thermostat?
Is AC voltage at
input of heater?
(black wires)
Replace
AC heater.
YES
