Quincy Compressor 50093-103 User Manual
Page 62
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UNSCHEDULED SHUTDOWN
PROBABLE CAUSE
CORRECTION
High air discharge temperature
Correct the situation in accordance with the instruction in the
"High Discharge Air Temperature and/or High Fluid Injection
Temperature" section of this troubleshooting guide. Restart
the vacuum pump.
Thermal overload relays tripping
Correct the cause of the overloaded condition, reset the
overload relay and press the reset button
Power failure
Check the power supply to the unit.
Faulty HAT switch
Contact qualified service technician.
Loose wire connections
Check all wiring terminals for contact and tightness.
Faulty control relay
Replace relay.
THERMAL OVERLOAD RELAYS TRIPPING
PROBABLE CAUSE
CORRECTION
Excessive discharge pressure
Check exhaust piping for restrictions. Check separator
element for condition.
Low voltage
Check voltage and amperages while operating the unit at
full load and full pressure.
Loose overload connection
Tighten mounting screws on "Thermal Overload".
Phase Fault
Could be caused by low voltage, phase unbalance, or loss
of phase. This may be an intermittent problem and you may
only need to press the "Start" button to resume operation.
But if problem repeats, the power company will need to
check the incoming power.
Incorrect thermal overload relay
setting
Check motor name plate and compare to overload relay
setting.
Faulty motor
Remove and have tested at motor manufacturer repair
center.