Diagnostics; Diagnostic Pre-Checks; Self-Test Diagnostics; Connecting The Led - Norcold N1090 Series Service Manual

Diagnostic Pre-Checks

Before performing detailed diagnostics inspect for the
following:
1. Make sure the refrigerator is turned ON.
2. Make sure the door is closed and sealing correctly.
3. Make sure the refrigerator is correctly installed and that
the vents are not blocked.
There may be more than one over current
NOTICE
device in the refrigerator supply circuit.
Be sure to check both the RV and refrigera-
tor.
4. Make sure the vehicle fuse or circuit breaker is intact.
5. Make sure the ambient temperature is not unusually high
(more than 110° F. / 43° C.). Maximum ambient tempera-
ture is 131 F.
°
6. Make sure that the air circulation inside the refrigerator
is not decreased by foods or by shelves that are covered
with plastic, paper, etc.
7. Make sure the freezer is defrosted.
8. Bypass the thermostat by disconnecting the wires and
installing jumper wire in place of thermostat. If unit works
replace thermostat.
After these pre-checks, if the refrigerator does not operate:
9. Remove unit from its enclosure; refer to "Remove and
Install" section.
10. Perform the diagnostics outlined in the "Self-Test Diag-
nostics" section.
11. If the self-test diagnostic tests do not reveal an error code,
refer to the "Diagnostic Symptom Chart."

Self-Test Diagnostics

The unit's control module is equipped with a self-test
diagnostic function which can be read using a light emitting
diode (LED). To access the error codes displayed in the
control module, you will need the items in Fig. 2. Refer to Fig.
3 - Fig. 3.5 for diagnostic instructions.
A1
A2

Fig. 2 - LED and connectors

Refrigerator Service Manual / Manuel d'entretien du réfrigérateur / Manual de servicio del refrigerador

DIAGNOSTICS

A
B
Reference Description
A (1x) 10 mA LED with wire leads
A1 (1x) 1/4 inch push-on female connectors (Black)
A2 (1x) 1/4 inch push-on female connectors (Red)
B 1/4 inch adapter with one (1) female and two (2) male
connections
C 12 VDC Input Wire
D 12 VDC Terminal "+"
E Control Module
F Terminal "D"

Fig. 3 - LED, connectors and control module

Do not leave jumpers in place for normal
NOTICE
operation.
The control module may vary in appearance,
but the procedure is identical regardless of
model.

Connecting the LED

Refer to Fig. 2, and Figs. 3.1-3.5
1. Attach the two (2) female blade connectors
the wire leads of the LED
1 1
A

Fig. 3.1 - Attach Blade Connectors

2. On the control module (E)
wire from the terminal
(C) "+"
2 2
C
E
Modelos N1090 / Modèles N1090 / Modelos N1090
(A1, A2)
.
(A)
A2
A1
, disconnect the 12 VDC input
.
(D)
D
_
12/24 Vdc
+
+
F
D
C
P
T
to
5