Quincy QGB 20, Instruction Manual

Page: 79 / 100

Section VIII - Troubleshooting
Frequent Air Cleaner Clogging:
c
omPressor oPerating in highly contaminated
atmosPhere
a
ir cleaner not adequate for conditions
Inlet Valve Not Opening Or Closing
In Relation To Air Demand:
i
mProPer Pressure setting or faulty sensor
e
xcessive moisture in control air line at air
cylinder
i
mProPer functioning of inlet valve Piston
j
ammed air inlet valve assemBly
f
aulty solenoid valve
f
aulty shuttle valve
l
oose wiring connections at solenoid valve
/
Pressure switch
B
roken sPring in air inlet valve
Compressor Does Not Unload
When There Is No Air Demand:
i
ncorrect air Pressure setting
f
aulty air Pressure sensor
f
aulty Blowdown valve
f
aulty solenoid valve
f
aulty differential Pilot valve
l
eaks in control lines
l
eaks in service lines
u
se remote air intake mounting
.
u
se sPecialized air filter
. c
ontact an
a
uthorized
q
uincy
d
istriButor
.
a
djust air Pressure setting or rePlace sensor
,
if faulty
.
s
ervice control air line filter daily
.
c
heck Piston and cylinder Bore
. r
ePair or
rePlace as needed
.
c
heck air inlet valve Bushing and shaft
. c
heck
Piston and cylinder Bore
. r
ePair or rePlace as
needed
.
r
ePair or rePlace as necessary
.
r
ePair or rePlace as necessary
.
c
heck and tighten wiring terminals
.
r
ePlace sPring
.
a
djust to ProPer setting
.
r
ePlace sensor
.
r
ePair or rePlace as necessary
.
r
ePair or rePlace as necessary
.
r
ePair or rePlace as necessary
.
c
heck all control line fittings and tuBing
.
c
heck lines Before
mPc
valve
.
Quincy Compressor-QGB
™
75
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