Self-Test Diagnostic Chart; Diagnostic Symptom Chart; Electronic Controls Fault Code Chart; Fig. 4.4 - Adapter - Norcold N8DCX Service Manual

Self -Test Diagnostics, cont'd.
Step 3. Connect Adapter
C

Fig. 4.4 - Adapter

Connect the adapter to the positive terminal of the control module.
Step 4. Connect LED
A2
A1

Fig. 4.5 - LED

Connect the black LED wire to one side of the adapter; connect the
red LED wire to terminal "D" of the control module.
Step 5. Connect 12VDC

Fig. 4.6 - 12VDC

Connect the 12 VDC input wire to the other side of the adapter.
Do NOT leave jumpers in place for
NOTICE
normal operation.
N8DCX, N10DCX Models
_
12/24 Vdc
+
+
F E
D
C
P
T
_
12/24 Vdc
+
+
F
C
D
C
P
T
F
C
_
12/24 Vdc
+
+
F
D
D
C
P
T

Self-Test Diagnostic Chart

Flashes Description
1 Battery Protection Cut-Out.
The voltage is outside the cut out setting.
2 Fan Over current Cut-Out.
The fan electrical load is more than 1.0 amp.
3 Motor Start Error.
The rotor is blocked or the differential pressure in the
refrigeration system is too high ( >5 bar).
4 Minimum Motor Speed Error.
The motor can not maintain minimum speed (1850 rpm).
5 Thermal Cutout of Electronic Unit.
The electronic unit is running too hot.
6 Controller Hardware Failure
Controller detects abnormal parameters

Diagnostic Symptom Chart

Problem Possible Cause
Not cooling, not - Faulty thermistor.
- No power to control module.
turning on.
- Faulty wire from control module to compressor
- Faulty control module.
- Faulty Compressor.
Refrigerator gets - Bad capillary tube position.
- Faulty thermistor
too cold.
- Faulty control module.
Refrigerator - Door not closed.
- Damaged door gasket.
builds frost inside.
Runs, but does - High ambient temperatures .
- Blocked air ventilation.
not cool properly.
- Frost build up.
- Condenser coil restricted.
- Faulty condenser fan.
- Faulty cooling unit.
Will not run on - Blown fuse in DC circuit.
- Undersized wiring to refrigerator, minimum #12
DC power.
gauge wire required.
- Refer to Owner's Manual for recommended wire
size.
- Partially discharged battery, voltage below 11.3
VDC at compressor module.
- High resistance (voltage drop) in supply circuit.
Voltage within - Parts can cause a + / - 10 VDC which can cause
range; refrigerator refrigerator voltage to register within specifi cation,
but cutout because of part variance.
cuts out.

Electronic Controls Fault Code Chart

Fault Code Fault Code Meaning
The thermistor in the fresh food compart-
E1
ment is not cycling properly.
The thermistor in the freezer compartment
E2
is not cycling properly.
E3 The voltage is outside the cut out setting.
The fresh food compartment door has
E4
been open for more than two (2) minutes.
10
Action
Perform
Test A.
Perform
Test B.
Perform
Test C.
Perform
Test D.
Perform
Test E.
Perform
Test K.
Action
to Take
Perform
Test F.
Perform
Test G.
Perform
Test H.
Perform
Test I.
Perform
Test J.
Perform
Test K.
Action to Take
Refer to "Fault Code -
"E1"" on page 24.
Refer to "Fault Code -
"E2"" on page 25.
Refer to "Fault Code -
"E3"" on page 26.
Refer to "Fault Code -
"E4"" on page 26.
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