Installation manual

TROUBLE COMMON CAUSE REMEDY
UNIT RUNS Abnormally high, heavy use of cabinet. Heavy usage requires more operation
TOO MUCH. Check usage and correct or explain.
Shortage of refrigerant. Unit must run Put in the normal charge and check for
longer and will operate at a lower leaks.
than normal suction pressure.
Overcharge of refrigerant. Excess- Remove excess charge.
ively cold or frosted suction liner
results in lost refrigeration effort.
Restricted air flow over condenser Correct the condition.
or air or non-condensable gases
in system.
High room temperature. Check for temperature variance. Correct
condition.
Compressor inefficient. Replace.
Thermostat setting too cold. Raise setting.
UNIT SHORT CYCLES. Cycling on overload because of high/low Check voltage, head pressure and air
line voltage with variance more or less passages. Repair and correct condition.
than 10% from 115 volts. May also
be caused by head pressures too high.
PRODUCT TOO COLD. Thermostat set too cold. Set warmer. (Setting #1 is the warmest; #7 is
the coldest.)
Thermostat bulb contact bad. If the bulb contact is bad, the bulb
temperature will lag behind the sleeve
temperature, causing the unit to run longer
and make the cabinet too cold. Make sure
bulb makes good contact with the bulb well.
Room temperature abnormally low. Correct conditions.
PRODUCT TOO WARM. Thermostat set too warm. Set colder. (setting #1 is the warmest; #7
the coldest.
Thermostat contact points dirty Clean or replace thermostat.
or burned.
Thermostat out of adjustment. Readjust or change thermostat.
Excessive service load or abnormally Educate customer about problems that are
high room temperature. caused by improper loading and excessive
room temperature fluctuations.
Excessive frost accumulation. Defrost the cabinet.
TROUBLESHOOTING 97