Section Viii - Troubleshooting - Quincy QGB Series Instruction Manual

Section VIII - Troubleshooting

Compressor Does Not Revert To
Load When Service Line Pressure
Drops To Reset Pressure:
f
aulty air Pressure sensor
l
oose wiring connection
j
ammed air inlet valve assemBly
f
aulty solenoid
f
aulty differential Pilot valve
Compressor Will Not Time-out Or
Shut Down When Unloaded (Auto/
Dual Only):
l
eaks in control lines
l
eaks in service lines
f
aulty air Pressure sensors
Excessive Water in Plant Air
Distribution System:
c
logged moisture seParator
i /a
nstallation PPlication
f /
aulty cooler leaks
Pressure Relief Valve Exhausting:
d
ifferential Pressure regulator not set correctly
a
ir Pressure not set correctly
a
ir inlet valve not closing ProPerly in relation to
air demand
P
lugged seParator
f
aulty receiver Pressure gauge
76
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r
c
c
r
o
necessary
c
c
r
/ c
traP
c
r
a
oBtain desired modulation range
r
comPressor unloads at the desired Pressure
c
in
relation to air demand
trouBleshooting guide
r
c
necessary
Quincy Compressor-QGB
ePair or rePlace as necessary
heck and tighten wiring terminals
heck and rePair air inlet valve
ePair or rePlace as necessary
. c
rifice Plugged lean or rePlace as
.
heck and rePair any leaks
heck Plant air distriBution system for leaks
.
ePlace as necessary
lean or rePlace as required
heck other comPressors on same system
.
ePlace cooler
djust differential Pressure regulator to
eadjust air Pressure switch so that the
orrect in accordance with the instruction
"i
nlet valve not oPening or closing in
"
section of this
.
/
ePlace with new air fluid seParator
heck gauge for accuracy and rePlace if
. a
djust control settings
™
.
.
.
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