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User’s Troubleshooting
This Troubleshooting Chart is not prepared to replace the training required for a
professional refrigeration service person, not is it comprehensive
Troubleshooting Chart
Complaint Possible
Causes
Response
1.Unit not
running
a. No
power
b. Power cord unplugged
c. Setting higher than ambient
temperature
d. Defrost
light
blinking
e. Compressor light blinking
f.
Incorrect or loose wirings.
g. Low
voltage.
a. Check power at receptacle & fuses
b. Check for power cord plug
c. Lower
temperature
setting
d. Unit is under defrost mode
e. Unit waits for anti-short cycle delay
f.
Check all wirings and connections
g. Contact an authorized electrician
2.Displaying
Temperature
fluctuating
a. Air sensor
When using an air sensor, the wine
bottle temperature is mainly controlled
by the average air temperature. If the
set-point is 55
°
F with a differential 4
°
F,
the cooling unit turns on at 59
°
F of air
temperature 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 varying.
3.Temperature
high, but
displaying
temperature
low, unit
stopping and
starting with
short
running time
a.
air sensor contacting the
evaporator
b. Short circuit of air flow between
supply and return air
c. Setting too high
d. Failed temperature controller
and air sensor
a. Move the air sensor away from the
evaporator
b. Deflect the supply air down
c. Lower
setting
d. Call service for diagnosis
4.Temperature
high,
compressor
stopping and
starting but
short
running time
a. Incorrect
voltage
b. Failed
components
c. Improper
condenser
airflow
d. Dirty
condenser
e. Overcharge of refrigerant
f. Discharge or suction pressure
too high
a. Check for voltage
b. Check compressor windings, start
relay and overload protector.
c. Check for condenser fan
d. Clean
condenser
e. Call service for removing refrigerant
f.
Call service for OEM information
5.Not cooling
or
a. Improper room insulation & seal
b. Room too large
a. Check for insulation, gasket and
door opening
b. Check for excessive size
