Reading The Led; Self-Test Diagnostic Chart; Diagnostic Symptom Chart; Fig. 7.4 - Connect Led - Norcold DE/EV0041 Serie Manual De Servicio

Self -Test Diagnostics - cont'd.
4 4
A2

Fig. 7.4 - Connect LED

5. Connect the 12 VDC input wire
blade (B) .
5 5
C

Fig. 7.5 - Connect LED

Do NOT leave jumpers in place for nor-
NOTICE
mal operation.

Reading the LED

If an error code is activated in the control module (Fig. 8, D) and
the LED (Fig. 8, A) is connected, it will fl ash a number of times. The
number of fl ashes will depend on what error was recorded. Each
fl ash will last 1/4 second and after the code is fl ashed there will be
a delay, then the code will repeat.
Write down all error codes; then refer to "Self-Test Diagnostic
Chart" in this section.

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.
www.norcold.com
_
B
12/24 Vdc
+
+
F
A1 F
D
C
P
T
to the other side of adapter
(C)
B
_
12/24 Vdc
+
F
A
C
D
C
P
T
Action
Perform Test A.
Perform Test B.
Perform Test C.
Perform Test D.
Perform Test E.

Diagnostic Symptom Chart

Problem Possible Cause
Not cooling, not turn- ■ Faulty thermostat.
ing on. ■ No power to control module.
■ Faulty wire from control module to
compressor.
Faulty control module.
■
Faulty Compressor.
■
Refrigerator gets too Bad capillary tube position.
■
Faulty thermostat.
cold. ■
Faulty control module.
■
Refrigerator builds Door not closed.
■
Damaged door gasket.
frost inside. ■
Air leak at foam plug.
■
Runs but does not ■ High ambient temperatures .
cool properly. ■ Blocked air ventilation.
■ Frost build up.
■ Condenser coil restricted.
■ Faulty condenser fan.
■ Faulty cooling unit.
Will not run on DC ■ Blown fuse in DC circuit.
power. ■ Undersized wiring to refrigerator,
minimum #12 gauge wire required.
Refer to Owner's Manual for
recommend wire size.
Partially discharged battery, volt-
■
age below 11.3 VDC at compres-
sor module.
High resistance (voltage drop) in
■
supply circuit.
Voltage within range Parts can cause a + / - 10 VDC which
but refrigerator cuts can cause refrigerator voltage to
out. register within specification, but cutout
because of part variance.
The refrigerator cools Bad thermostat
■
Bad cooling unit
to thermostat setting ■
DC power cord
but does not restart ■
until thawing begins
Inefficient cooling ■ Bad fan
when power source is ■ Bad controller
greater than 27 volts
or on AC power
Fuse holder is warm ■ Bad fuse
to the touch or ends ■ Bad DC power cord
are discolored.
Refrigerator cools ■ Bad thermostat
in brief operational ■ Bad power cord
■ Bad cooling unit
periods followed by
restart process which
drains power source
(Short cycling)
11
Action to Take
Perform Test F
Perform Test G
Perform Test H
Perform Test I
Perform Test J
Perform Test K
Perform Test L
Perform Test M
Perform Test N
Perform Test O
SERVICE MANUAL