-16-
Troubleshooting
This Troubleshooting Chart is not prepared to replace the training required for a
professional refrigeration service person, not is it comprehensive
Complaint
Possible Causes
Response
1. Unit not running
Power cord not plugged
No power from supply
Incorrect or loose wirings
Low voltage
Setting higher than
ambient
temperature
Cut-in too high
Defrost light blinking
Compressor light blinking
Defective controller
Check power cord
Check receptacle and fuses
Check all wirings and connections
Contact an authorized electrician
Lower temperature setting
Reduce Hy
Unit is under defrost mode
Unit is under anti-short cycle delay
Call service for diagnosis
2. Unit not starting
, but temperature
rising high
a. Anti-short cycle
a. Reset AC
3. Temperature
fluctuating
a. Air probe
a. When using an air probe, the wine
bottle temperature is mainly controlled
by the average air temperature. If the
set-point is 55
°
F with the differential 4F,
the cooling unit turns on at 59
°
F of air
temperature (It may be higher than
59
°
F if it is in anti-short cycle or defrost
cycle) and turns off at 55
°
F of air
temperature. The average air
temperature is 57
°
F, and then the wine
temperature is around 57+/- 0.5
°
F. The
air is light enough to change so quickly
that it maintains relatively constant
average temperature that would
prevent wine
bottle temperature from fluctuating.
4. Temperature
high, unit stopping
and starting
normally
a. Temperature setting high
a. Lower the setting
5. Temperature
high, unit stopping
and starting with
short running time
Air probe touching the evaporator
coil, displaying temperature ok
Short circuit of air flow between cold-
air supply and cellar-air return,
displaying temperature ok
Failed controller and probe
Move the air probe away from the
evaporator
Deflect the supply air down
Call service for diagnosis
6. Temperature
a. Improper cellar insulation & seal
a. Check insulation, gasket and door
