CABINET RUNS Not enough air circulation around Relocate cabinet or provide proper
CONTINUOUSLY. cabinet or circulation is restricted. clearances around cabinet.
Remove restriction.
Cooling large quantities of product or Explain to customer that heavy loading
heavy loading. causes long running time.
Refrigerant charge undercharged Check, evacuate and recharge with proper
or overcharged. charge.
Room temperature too warm. Ventilate room as much as possible.
Thermostat defective. Check control. If it allows unit to operate all
the time, replace control.
NOISY OPERATION. Loose flooring or floor not firm. Tighten flooring or brace floor.
Tubing contacting cabinet or other tubing. Move tubing gently!
Cabinet not level. Level cabinet.
Compressor mechanically grounded. Replace compressor mounts.
Fan hitting drain pan or Move fan.
mechanically grounding.
Shipping bands rubbing. Make sure all shipping bands have been cut
and removed.
Loose fan blades or motor. Tighten fan blades and/or motor.
Loose parts or refrigeration or electrical Tighten all loose fittings. Move misplaced
lines out of place. lines.
UNIT CYCLES ON OVERLOAD.
Short relay. Replace relay
Weak overload protector. Replace overload protector.
Low voltage. Check outlet with voltmeter. Underload
voltage should be 115V plus or minus
10%. Check for several cabinets on same
circuit or extremely long or underseed cord
being used.
Short compressor. Check with meter and also ground before
replacing.
CABINET LIGHTS Light switch off or defective. Try new bulb or bulbs. Inspect lampholders
WON’T WORK. for signs of bad connections.
COMPRESSOR Incorrect voltage. Check voltage to compressor terminal
WON’T RUN. board. Voltage must be plus or minus 10%
of nameplate voltage.
MACHINERY TROUBLESHOOTING GUIDES
MAINTENANCE & REPAIR 57
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