Self-Test Diagnostic Chart; Diagnostic Symptom Chart - Norcold DC558 Service Manual

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 exceeds 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
·
If the refrigeration system is too heavily loaded, the motor can not maintain minimum speed (1850 rpm).
5 Thermal Cutout of Electronic Unit
·
If the refrigeration system has been too heavily loaded or the ambient temperature is high, the electronic unit will run
too hot.

Diagnostic Symptom Chart

Problem
Not cooling, not turning on.
Gets too cold.
Builds frost inside.
Runs but does not cool properly.
Will not run.
DC558
Possible Cause
·
Faulty thermostat (6)
·
Power to control module
·
Faulty wire from control module to compressor
·
Faulty control module
·
Faulty Compressor (10)
·
Bad capillary tube position
·
Faulty thermostat (6)
·
Faulty control module
·
Door not closed
·
Damaged door gasket
·
Air leak at foam plug (7)
·
High ambient temperatures
·
Blocked air ventilation
·
Frost build up
·
Condenser coil (11) restricted
·
Faulty condenser fan
·
Faulty cooling unit
·
Blown fuse in DC circuit
·
Undersized wiring to refrigerator, minimum #12 gauge wire required, refer to Installation Manual for
recommended wire size
·
Partially discharged battery, voltage below 11.3 VDC at compressor module
·
High resistance (voltage drop) in supply circuit
10
Action to Take
Perform Test A
Perform Test B
Perform Test C
Perform Test D
Perform Test E
Action to Take
Perform Test F
Perform Test G
Perform Test H
Perform Test I
Perform Test J
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