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Symptom
The control is lit and
there is no alarm
condition. The com-
pressor hums, but
does not run.
Possible cause
The input voltage is
incorrect
There is a phase loss.
Solution
Check the main supply volt-
age. It must be within 10% of
the nameplate rating.
❐ Check the fuses on the main
power supply.
❐ Check the phase-to-phase
voltages.
❐ Check phase continuity
through the compressor con-
tactor.
❐ Check the wiring at the
compressor.
Replace or repair as needed.
CONTROL
PROBLEMS
CONT’D
Series 1 Portable Chillers, TIC Control UGH016/0500
6-6
TROUBLESHOOTING