Norcold N500 - N510 Fault Codes; H Fault Code - AC Heater Failed Open; r Fault Code - AC Relay Stuck Closed

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18
www.norcold.com/cda
N500/N510 Models
Refrigerator Service Manual
Before beginning this procedure make sure:
■
RV ac voltage to the refrigerator is 108 to 132 volts.
■
No other appliance or lighting circuit is connected to the refrigerator ac circuit.
LP GASAC
AUTO
Fault indicator displayed:
NO
YES
Check ac heater resistance.
See Figure 9.
NO
Replace ac heater. See page 30.
YES
Replace power board. See page 43.
Check ac heater wires for
loose or damaged connector.
Resistance
58 to 64
Ω ?
Repair or replace connectors. If
connectors cannot be repaired, replace
heater. See page 30.
Heater
connectors
OK?
H Fault Code - AC heater failed open - N510
AC heater resistance 58 to 64 Ω.
Figure 9. Measuring ac heater resistance
Fault indicator displayed:
Replace power board. See page 43.
Flame sense circuit failure.
LP GASAC
AUTO
r Fault Code - AC relay stuck closed - N510