Refrigerator Service Manual / Manuel d'entretien du réfrigérateur / Manual de servicio del refrigerador
14
NR740, 751 Models / Modèles NR740, 751 / Modelos NR740, 751
Problem
Possible Cause
Action to Take
Not Cooling, Not
Turning On
■
Faulty thermostat
■
Power to control module
■
Broken wire from module to compressor
■
Faulty control module
■
Faulty compressor
Perform Test F
Refrigerator Gets Too Cold
■
Bad capillary tube position
■
Faulty thermostat
■
Faulty control module
Perform Test G
Refrigerator Builds Frost Inside
■
Door not closed
■
Damaged door gasket
Perform Test H
Runs But Does Not Cool Properly
■
High ambient temperatures
■
Blocked air ventilation
■
Frost build up
■
Condenser coil restricted
■
Faulty condenser fan
■
Faulty cooling unit
Perform Test I
Diagnostic Symptom Chart
Flashes
Description
Action to Take
1
Battery Protection Cut-Out.
■
The voltage is outside the cut out setting
Perform Test A
2
Fan Over current Cut-Out.
■
The fan electrical load exceeds more than 1.0 amp
Perform Test B
3
Motor Start Error.
■
The rotor is blocked or the differential pressure in the
refrigeration system is too high ( >5 bar)
Perform Test C
4
Minimum Motor Speed Error.
■
If the refrigeration system is too heavily loaded, the
motor can not maintain minimum speed (1850)
Perform Test D
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
Perform Test E
Self-Test Diagnostic Chart
