Error Code 4; Dc Heater Off - Should Be On; Dc Heater On - Should Be Off - Norcold N3104 Series Service Manual

Error Code Tests, cont'd.
Be sure you have followed the "Diag-
NOTICE
nostic Pre-Checks" before continuing.
Once the problem is corrected, you
MUST power the refrigerator off and
on to clear the fault code display.
START
Is 20 AMP fuse good?
Yes
Disconnect power. Check all
to DC heater.
Are the connec ons secure?
Yes
Check for DC power on heater
conne ons. Is it within tolerance?
N3104: 14.7-17.7 AMPS
N3141 / N3150: 16.1-19.1 AMPS
Yes
Remove DC heater leads from power
control board. Measure the heater
resistance. Is it within tolerance?
Yes
N3104: .74 ± .2 Ohm
N3141 / N3150: .68 ± .2 Ohm
Yes
Replace power control
board and LCD display.
Be sure you have followed the "Diag-
NOTICE
nostic Pre-Checks" before continuing.
Once the problem is corrected, you
MUST power the refrigerator off and
on to clear the fault code display.
START
Is unit production
date prior to Jan. 4,
2013?
No
Replace power
control board.
Replace fuse.
No
Correct connec ons.
No
Check DC supply voltage.
No
Replace DC heater.
No
Is unit produc n date prior to
Jan. 4, 2013?
Replace power control
board.
Replace power
Yes
control board and
LCD display

Error Code 4

DC heater Off - should be On

No
Error Code 5

DC heater On - should be Off

11
N3104, N3141, N3150 Models