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4.5 Refrigerant Compressor
Troubleshooting
If the mechanical refrigeration compressor is
short-cycling (turning on and off rapidly), or
the compressor will not come on at all when
cooling is required, the compressor may
have been safely locked out by the
refrigerant pressure control or a high glycol
temperature safety.
4.5.1 Compressor Restart
1) Confirm ambient air temperature is within
range -20°F to 120°F.
2) Confirm the condenser fins are clean and
allow ambient air flow through the
condenser.
3) Verify the inlet to condenser is at least
36” from any obstruction.
4) Confirm that another application is not
directing hot air into the condenser inlet
and the water pump is circulating cooling
water (pressure gauge needle indicates
discharge pressure or other means).
5) Manually reset the refrigerant pressure
control by pressing the black reset button
on top of the dual pressure control unit.
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