Section VIII - Troubleshooting
Unscheduled Shutdown (continued):
f
aulty
hat
sensors
f
aulty
control
relay
Thermal Overload Relays Tripping:
e
xcessive
discharge
Pressure
l
ow
voltage
l
oose
overload
connection
i
ncorrect
thermal
overload
relay
setting
l
oose
motor
or
starter
wiring
f
aulty
motor
Low Air Delivery:
P
lugged
air
intake
filter
element
e
xcessive
leaks
in
the
service
lines
i
nlet
valve
not
fully
oPen
r
estricted
fluid
flow
Low Receiver Pressure:
e
xcessive
air
demand
e
xcessive
leaks
in
the
service
lines
i
nlet
valve
not
fully
oPen
P
lugged
air
intake
filter
c
ontact
a
qualified
service
technician
for
rePairs
.
r
ePlace
relay
.
l
ower
full
load
Pressure
setting
at
control
Panel
.
c
heck
voltage
and
amPerages
while
oPerating
at
full
load
Pressure
.
t
ighten
mounting
screws
on
thermal
overload
.
c
heck
motor
namePlate
and
comPare
to
overload
relay
setting
.
c
heck
all
connections
for
tightness
.
c
heck
motor
starter
wiring
Before
removing
motor
. r
emove
motor
and
have
tested
at
motor
manufacturer
rePair
center
.
c
lean
air
filter
element
or
rePlace
with
new
element
.
c
heck
service
lines
for
leaks
with
soaP
suds
.
r
ePair
as
necessary
.
c
heck
for
Build
uP
or
gumming
of
shaft
.
c
heck
fluid
filter
for
Plugging
.
r
eevaluate
air
demand
. i
nstall
additional
comPressors
as
needed
.
c
heck
service
lines
for
leaks
with
soaP
suds
.
r
ePair
as
necessary
.
c
orrect
in
accordance
with
the
instructions
in
“i
nlet
valve
not
oPening
or
closing
in
relation
to
air
demand
”
section
of
trouBleshooting
guide
.
r
ePlace
air
filter
element
.
Quincy Compressor-QGB
™
71
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