Dc Lo Fault Code - Low Dc Voltage; Sr Fs - Sr Fault Code - Flame Sense Circuit Failure - Norcold 1200 series Service Manual

Sr FS - Sr Fault Code – Flame sense circuit failure
Fault indicator displayed:
"Sr" and "FS" Flashing
Cold
ON
OFF
"AC" LED Flashing
Flame sense circuit failure.
dc LO Fault Code – Low dc voltage
Before beginning this procedure:
■ Make sure RV DC voltage to refrigerator is 10.5 to 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:
"dc" and "LO" Flashing
Cold
ON TEMP
OFF
Check for DC voltage input
to power board terminals
12VDC and GND1.
Electronic controls operate on 12 Vdc. When an AC/DC converter is used to
supply DC power, the refrigerator circuit must be connected to the appliance
output terminals of the converter (filtered side).
If the refrigerator circuit is connected to the unfiltered side, the AC ripple
generated by the converter may cause a "dc LO" fault code to display.
To troubleshoot a "dc LO" fault, connect a charged 12 volt automotive battery
to the power board. If the "dc LO" code clears, the fault was caused by
unfiltered DC power.
If the "dc LO" code does not clear, replace the power board (see page 40).
Refrigerator Service Manual
Coldest
TEMP
MODE
SET
AUTO AC LP GAS
Coldest
MODE
SET
AUTO AC LP GAS
Voltage
YES
lower than
10.5 Vdc?
NO
NOTE
www.norcold.com/cda
"Sr" Flashing
on
1 COLD - 9 COLDEST SET TEMP MODE
Replace power board.
See page 40.
"dc" and "LO" Flashing
on
1 COLD - 9 COLDEST SET TEMP MODE
Check RV 12 Vdc power supply to
refrigerator.
See NOTE below to determine
and correct low "dc LO" fault.
1200XX/120X-IMXX Models
ON / OFF
ON / OFF
11