Troubleshooting - Cornelius UC 700 Series Installation & 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
THE COMPRESSOR STARTS BUT
TRIPS REPEATEDLY ON THE OVER-
LOAD PROTECTOR
THE COMPRESSOR RUNS BUT WILL
NOT REFRIGERATE
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© 2000-2011, IMI Cornelius Inc.
UC 700 Series Continus-Flow Icemaker Installation/Service Manual

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 instruc-
tions
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 instruc-
tions.
A. Check the compressor suctions
and discharge pressures. See
chart on page 13.
Publication Number: 630460127