Self-Test Diagnostic Chart; Diagnostic Symptom Chart - Norcold NR740 Serie Manual De Servicio

Self-Test Diagnostic Chart

Flashes
1 Battery Protection Cut-Out.
■
2 Fan Over current Cut-Out.
■
3 Motor Start Error.
■
4 Minimum Motor Speed Error.
■
5 Thermal Cutout of Electronic Unit.
■

Diagnostic Symptom Chart

Problem
Not Cooling, Not
Refrigerator Gets Too Cold ■ Bad capillary tube position
Refrigerator Builds Frost Inside ■ Door not closed
Runs But Does Not Cool Properly ■ High ambient temperatures
NR740, 751 Models / Modèles NR740, 751 / Modelos NR740, 751
14
Description
The voltage is outside the cut out setting
The fan electrical load exceeds more than 1.0 amp
The rotor is blocked or the differential pressure in the
refrigeration system is too high ( >5 bar)
If the refrigeration system is too heavily loaded, the
motor can not maintain minimum speed (1850)
If the refrigeration system has been too heavily loaded
or the ambient temperature is high, the electronic unit
will run too hot
■ Faulty thermostat
Turning On
■ Power to control module
■ Broken wire from module to compressor
■ Faulty control module
■ Faulty compressor
■ Faulty thermostat
■ Faulty control module
■ Damaged door gasket
■ Blocked air ventilation
■ Frost build up
■ Condenser coil restricted
■ Faulty condenser fan
■ Faulty cooling unit
Possible Cause
Refrigerator Service Manual / Manuel d'entretien du réfrigérateur / Manual de servicio del refrigerador
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