Norcold N500 - No AC Operation - N500 Units

DRAFT
NOT FOR PUBLIC RELEASE
9
www.norcold.com/cda N500/N510 ModelsRefrigerator Service Manual
No AC Operation - N500 Units
Connections
good?
AC
voltage
present?
Before beginning this procedure make sure:
■
The refrigerator is receiving 108 (minimum) to 132 (maximum) Vac from a grounded receptacle.
■
Fuse holder and 3 amp fuse are in good condition.
■
Selector knob is set to "AC."
■
Thermostat knob is set to 5.
Check wiring, connections, and
terminal block and replace or
repair if necessary.
NO
YES
Check connections to and
from 3 amp fuse.
NO
Repair or replace connections.
Connec-
tions tight and
heater
good?
Check heater wire
connections and heater
resistance.
NO
Repair or replace connections. Replace
ac heater if resistance is below 58 or
above 64. See page 30.
Set Thermostat to 5. Check voltage
input to Thermostat and voltage output
from Thermostat to heater.
■
No voltage to input: Check blue wire
for continuity.
■
No voltage from output: Replace
Thermostat assembly.
Set selector switch to "AC."
Check voltage out of
selector switch terminal 1b.
NO
Replace selector switch. See page 45.
Check voltage to selector
switch terminal 1a.
NO
Check continuity of black wire connected
to 3 amp fuse. If no continuity, repair or
replace wire.
Measure voltage across
terminal block terminals
5 and 6.
YES
AC
voltage
present?
AC
voltage
present?
YES
YES
YES