Quincy Compressor 50093-103 - Manual (Page 67)

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VACUUM PUMP WILL NOT TIME-OUT OR SHUT DOWN WHEN UNLOADED
PROBABLE CAUSE CORRECTION
Faulty timer Check and replace as necessary.
Loose wire connections Check all wiring terminals for contact and tightness.
Leaks in control lines Check and repair leaks.
TOO RAPID CYCLING BETWEEN LOAD AND UNLOAD
PROBABLE CAUSE CORRECTION
Too small system volume Provide sufficient volume by adding additional piping or a
receiver to vacuum system. CAUTION: Volume adds time
to cyclic applications, be sure to consult with factory.
Leaks in control lines Check and repair leaks.
Faulty vacuum switch Repair or replace as necessary.
FREQUENT FLUID FILTER CLOGGING
PROBABLE CAUSE CORRECTION
Faulty indicator Replace indicator assembly.
Incorrect fluid filter Use genuine Quincy replacements only.
Faulty, incorrect or inadequate air
filter Replace filter element. Consult factory if necessary
Fluid breakdown Correct the situation in accordance with the instructions in
"Fluid Breakdown" section of this troubleshooting guide.
System contamination Check and clean system of all dirt, corrosion and varnish.
Inadequate circulation of cooling
air at the cooler Check the location of the cooler to make sure that there is
no restriction to free circulation of cooling air. Also check
fins at the cooler and if dust laden, clean them with air
while the machine is not running.