Quincy QSF Series, Instruction Manual

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Section VII– Troubleshooting
PROBABLE CAUSE
CORRECTIVE ACTION
Fluid Discharge Out Blowdown Valve
Too high fluid level in reservoir Adjust fluid level to recommended fluid level by draining the
reservoir. Use fluid level gauge as a guide.
Cycling too often between load and
unload Correct in accordance with instructions in “Too rapid cycling
between load and unload” section of this troubleshooting guide.
Air/fluid reservoir blows down too
fast Check for proper blow-down valve size
Inlet valve not closing completely Correct in accordance with instructions in “Inlet valve not opening or
closing in relation to air demand” section of this troubleshooting
guide.
Frequent Fluid Filter Clogging
Faulty indicator (Standard QSF) Replace indicator assembly.
Incorrect fluid filter Use genuine Quincy replacement filters only.
Faulty, incorrect or inadequate air
filter Replace air filter element. Use genuine Quincy replacement
elements only.
Fluid breakdown See "Separator Clogging" 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 location of cooler and assure there is no restriction to free
circulation of cooling air. Check fins at cooler and clean as necessary
while machine is not running.
Low fluid level in reservoir Add fluid to recommended level. Check fluid distribution system for
leaks.
Clogged fluid filter Replace fluid filter element.
Clogged fluid cooler Check fluid cooler for varnishing and rust deposits. If condition exist,
clean cooler thoroughly and contact Quincy service technician for
instructions.
Excessive ambient temperatures Maximum ambient for proper operation is listed in data sheet.
Incorrect fan rotation Correct rotation is with the fan pushing the air through the cooler.
Reverse motor starter leads L1 and L2.
Improper fluid Use recommended fluids only. Refer to lubrication section of
manual.
Clogged air filter Clean or replace as necessary.
Faulty thermal valve Repair or replace as necessary.
Faulty gauges Check and replace as necessary.
Air end failure Contact a Quincy authorized distributor.
Quincy Compressor – QSF Series
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