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www.norcold.com/cda 11N6XX/N8XX ModelsRefrigerator Service Manual
Blank Display – Refrigerator does not turn on
TROUBLESHOOTING FLOWCHARTS
Figure A.
Figure B.
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 Vdc input to the power board is wired according to the N6XX/N8XX installation manual.
Models and fault indicator displayed.
N61X/N81X
ON
GAS
check if flashing
N62X/N82X
LP GASAC
AUTO
Blank
Display
Screen
N64X/N84X
Blank
Display
Screen
Measure voltage at power
board 12VDC and GND1
connections.
1. No DC power input from RV to unit.
2. Faulty wiring or connectors.
NO
NO
YES
Check condition of F1 fuse
in power board. See Figure A.
Replace fuse. Use a standard 5 amp
(tan color) automotive blade type fuse.
10.5
to
15.4 Vdc?
YES
Measure voltage at optical
control harness.
See Figure B.
Replace power board.
YES
Voltage
present?
NO
Replace optical control board.
F1 fuse okay?
Wire harness optical
control display connector
White/red wire
White/violet wire
MIN MAX RANGE HOLD
H
HzREL
mA
A
mV
V
V
OFF
!
!
A
COM
V
mA µA
1000V MAX
400mA MAX
FUSED
10A MAX
FUSED
PEAK MIN MAX
µA
CAT II
4 1/2 DIGITS
1 Seconds
87
TRUE RMS MULTI METER
III
V
10.5 to 15.4 Vdc
V
Optical control display wire harness connection voltage measuring points.
M
I
N
M
A
X
R
A
N
G
E
H
O
L
D
H
H
z
R
E
L
mA
A
mV
V
V
O
F
F
!
!
A
C
O
M
V
m
A
µ
A
1
0
0
0
V
M
AX
4
0
0m
A
M
AX
F
U
S
E
D
1
0
A
M
A
X
F
U
S
E
D
P
E
A
K
M
I
N
M
A
X
µ
A
C
A
T
I
I
4
1
/
2
D
I
G
I
T
S
1
S
e
c
o
n
d
s
87
T
R
U
E
R
M
S
M
U
L
T
I
M
E
T
E
R
I
I
I
Good= 00.0
Ω
00.0
Bad = OL
Checking DC fuse continuity.