Troubleshooting; The Compressor Will Not Run; The Compressor Starts But Trips Repeatedly On The Overload Protector; The Compressor Runs But Will Not Refrigerate - Cornelius 500-Series Installation And Service Manual

IMPORTANT: Only qualified personnel should service internal components or electrical wiring.
TROUBLESHOOTING COMPRESSORS
Trouble
Basically the compressor problems can be narrowed down to three areas of checkout.
THE COMPRESSOR WILL
NOT RUN NOT RUN
THE COMPRESSOR STARTS
BUT TRIPS REPEATEDLY ON BUT TRIPS REPEATEDLY ON
THE OVERLOAD THE OVERLOAD
PROTECTOR
THE COMPRESSOR RUNS
BUT WILL NOT
REFRIGERATE

TROUBLESHOOTING

Probable Cause
A. No voltage to the compressor
terminals.
B. Low voltage.
C. Problems in the compressor
electrical circuit.
A.
B.
C. Voltage.
D. High compressor amperage
draw.
A. Compressor not working.
27
Remedy
A. Check circuit.
B. Below 90% of nameplate rated
voltage.
C. See electrical checkout
instructions.
A. Check for proper fan operation
and clean condenser.
B. Check the compressor suction
and discharge pressures.
C. Voltage should be within 10% of
the rated nameplate voltage.
D. It should never exceed 120% of
the rated nameplate amperage.
See electrical checkout
instructions.
A. Check the compressor suctions
and discharge pressures. See
chart on page 16.
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