SERVICE MANUAL
53
www.norcold.com
Cooling System Diagnostic Flowchart
Do not bypass or modify the refrigerator’s
controls or components to diagnose the
cooling system. Do not wire the heater(s)
direct. The heater is supplied power
through a fused circuit.
ATTENTION
!
WARNING
DIAGNOSTIC MODE - N7LX AND N8LX MODELS, cont’d.
Do not operate the refrigerator if the cool-
ing unit is leaking or a leak is suspected.
ATTENTION
!
WARNING
Check cooling unit.
Correct ventilation to meet
installation requirements
.
YES
NO
Check heat input.
NO
NO
Correct heat input device to
meet specifications
.
YES
NO
Level refrigerator as outlined
in
Owner's Manual
and
specifications.
YES
YES
Replace cooling unit.
Refrigerator
operating leveled?
Ventilation as
per installation
instructions?
Any signs of leak?
Heat input device
operating within
specification?
Cooling detected?
Replace cooling unit.
NO
YES
Test cooling unit
performance.
Recheck cooling unit for leaks.
Replace cooling unit.
YES
NO
The back of the freezer plate
should be cool after 3-4 hours of
continuous operation.
YES
Unit is operating normally.
Repair/replace door as
required.
YES
NO
Check condition of door gaskets.
Contact Customer Service
NO
Temperatures given below are based on 90°F ambient
temperature, correct ventilation, and operation at coldest
setting for a period of 8-12 hours.
Freezer -5°F to -10°F.
Fin temperature 18°F to 25°F.
Door gaskets
sealing properly?
Refrigerator
temperatures
normal
?
Visual and audible signs of leak(s):
Yellow residue on the rear of the refrigerator.
Ammonia smell.
Gurgling noise (not always present).
Cooling unit performance test:
1. Disconnect thermistor from the wire harness.
2. Set temperature setting to the coldest setting.
3. Place thermometer in freezer.
4. Allow unit to operate for 3-4 hours.
5. Measure temperature.
Any signs of
leakage present?
Continued on following page.
NOR000797A