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
/
traP
i
nstallation
/a
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
r
ePair
or
rePlace
as
necessary
.
c
heck
and
tighten
wiring
terminals
.
c
heck
and
rePair
air
inlet
valve
.
r
ePair
or
rePlace
as
necessary
.
o
rifice
Plugged
. c
lean
or
rePlace
as
necessary
.
c
heck
and
rePair
any
leaks
.
c
heck
Plant
air
distriBution
system
for
leaks
.
r
ePlace
as
necessary
.
c
lean
or
rePlace
as
required
.
c
heck
other
comPressors
on
same
system
.
r
ePlace
cooler
.
a
djust
differential
Pressure
regulator
to
oBtain
desired
modulation
range
.
r
eadjust
air
Pressure
switch
so
that
the
comPressor
unloads
at
the
desired
Pressure
.
c
orrect
in
accordance
with
the
instruction
in
“i
nlet
valve
not
oPening
or
closing
in
relation
to
air
demand
”
section
of
this
trouBleshooting
guide
.
r
ePlace
with
new
air
/
fluid
seParator
.
c
heck
gauge
for
accuracy
and
rePlace
if
necessary
. a
djust
control
settings
.
76
Quincy Compressor-QGB
™
Back to Table of Contents
