Norcold 1200 Series Service Manual

Also see for 120-IM series: Service manual

Norcold 1200 Series Service Manual Manual pdf 15 page image

1200XX/120X-IMXX ModelsRefrigerator Service Manual"Sr" "FS"/"Sr" Fault Code – Flame sense circuit failure"dc" "LO" Fault Code –dc voltage input to power board is lower than 10.5 voltsNOTEElectronic controls operate on 12 volt DC. When an AC/DC converter isused to supply DC power, the refrigerator circuit must be connected to theappliance output terminals of the converter (filtered side).If the refrigerator circuit is connected to the unfiltered side, the AC ripplegenerated by the converter may cause a "dc LO" fault code to display.To troubleshoot a "dc LO" fault, connect a charged 12 volt automotivebattery to the power board. If the "dc LO" code clears, the fault was causedby unfiltered DC power.If the "dc LO" code does not clear, replace the power board (see page39).Fault indicator displayed:Replace power board.See page 39.Flame sense circuit failure.1 COLD - 9 COLDEST SET TEMP MODE ON / OFFon"Sr" FlashingCold ColdestONOFF MODETEMPSETAC LP GASAUTO"AC" LED Flashing"Sr" and "FS" FlashingAudibleAlarmAudibleAlarmBefore beginning this procedure:Make sure RV DC voltage to refrigerator is at least 10.5 and no more than 15.4 volts.Determine if the "dc LO" fault code displays when the converter is the source of DC power.Make sure no other appliance or lighting circuit is connected to the refrigerator DC circuit.Fault indicator displayed:Voltagelower than10.5 volts?NOCheck RV 12 volt DC power supply torefrigerator.YESSee NOTE below to determineand correct low "dc LO" fault.Check for DC voltage inputto power board terminals12VDC and GND1.Cold ColdestONOFF MODETEMPSETAC LP GASAUTO 1 COLD - 9 COLDEST SET TEMP MODE ON / OFFonAudibleAlarm"dc" and "LO" Flashing"dc" and "LO" FlashingAudibleAlarm11