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DIAGNOSTICS - cont'd.
Self-Test Diagnostic Chart
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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 thermostat.
turning 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.
cold.
Faulty thermostat.
■
■
Faulty control module.
Refrigerator builds
Door not closed.
■
frost inside.
■
Damaged door gasket.
■
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.
N1152
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
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