Norcold N109X Series User Manual

N109X Models
Refrigerator Service Manual
Blank Display – Refrigerator does not turn on
TROUBLESHOOTING FLOWCHARTS
Figure 3. Checking the dc fuse
continuity
Figure 4. Measurement points for wire harness voltage
Before beginning this procedure make sure:
■
The RV DC power system is supplying 10.5 to 15.4 volts to the refrigerator.
■
No other RV appliances or lighting circuits are connected to the refrigerator dc circuit.
■
12 volt DC input to the power board is wired according to the N109X Installation Manual.
Fault indicator displayed:
Measure voltage across
power board 12VDC and
GND1 connections
.
1. Low/no DC power input to power board.
2. Loose/faulty wiring or connectors.
NO
NO
YES
Check condition of F1 fuse
in power board. See Figure 3.
Replace fuse. Use a standard 5 amp
(tan color) automotive blade style fuse.
10.5 to
15.4 volts DC?
YES
Measure voltage at optical
control harness. See
Figure 4.
Replace power board.
See page 38.
YES
Voltage
present?
NO
Replace optical control assembly.
See page 39.
F1 fuse okay?
Wire harness optical
control display connector
White/red wire
White/violet wire
87
III
V
10.5 to 15.4 volts DC
V
mA
A
mV
V
V
OFF
A
COM
V
mA
m
A
m
A
87
III
Good= 00.0 W
00.0
Bad = OL
F1 Fuse
ON
TEMP
SET
MODE
ON-OFF
1-COLD COLDEST-9
8

Norcold N109X Series Specifications

General

Brand	Norcold
Model	N109X Series
Category	Refrigerator
Language	English