Dc" "Lo" Fault Code; Sr" "Fs"/"Sr" Fault Code - Norcold 1200 Series Service Manual

"Sr" "FS"/"Sr" Fault Code – Flame sense circuit failure
Fault indicator displayed:
"Sr" and "FS" Flashing
ON
"AC" LED Flashing
Flame sense circuit failure.
"dc" "LO" Fault Code –dc voltage input to power board is lower than 10.5 volts
Before 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:
"dc" and "LO" Flashing
ON
Check for DC voltage input
to power board terminals
12VDC and GND1.
Electronic controls operate on 12 volt DC. 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
39).
Refrigerator Service Manual
Coldest
Cold
TEMP
MODE
SET
OFF
AUTO AC LP GAS
Cold Coldest
TEMP
MODE
OFF SET
AUTO AC LP GAS
Voltage
lower than
10.5 volts?
1 COLD - 9 COLDEST
Replace power board.
See page 39.
1 COLD - 9 COLDEST
YES
Check RV 12 volt DC power supply to
refrigerator.
NO
See NOTE below to determine
and correct low "dc LO" fault.
NOTE
"Sr" Flashing
on
SET TEMP MODE ON / OFF
"dc" and "LO" Flashing
on
SET TEMP MODE ON / OFF
1200XX/120X-IMXX Models
11