Section Viii - Troubleshooting - Quincy QGB Series Instruction Manual

Section VIII - Troubleshooting

Integrated Dryer Troubleshooting
(continued):
Noisy unit:
m .
ountings loose
B .
ent fan Blade
f
an motor Bearing worn
r
efrigerant flooding Back
c
omPressor oil charge low
Frosted suction line:
e /
xPansion valve and or hot gas ByPass out of
.
adjustment
Unit runs but air temperature is
high:
note: o
utlet air temPerature gauge may read
higher than actual temPeratures at low air flow
.
conditions
r .
efrigerant leak
e
vaPorator controls set too high
f / .
ilter dryer clogged
r .
efrigerant shortage
d .
irty condenser
a .
ir in system
c .
omPressor inefficient
e ( )
vaPorator control s stuck
d .
efective insulation
a .
ir overload
u .
nit too small
h .
igh amBient
e
ntering air temPerature too high
82
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.
.
.
.
.
.
Quincy Compressor-QGB
t , .
ighten mounting etc
s
traighten or rePlace Blade
r .
ePlace
c ,
heck exPansion valve
. c
rePlace heck crankcase heater
c .
heck oil level
a
djust the hot gas ByPass valve to Bring the
suction Pressure into the ProPer range
l
ocate with leak detector
.
defective Part
c .
orrect setting
r .
ePlace
r
ePair leak and recharge
c .
lean condenser
c , ,
heck reason rePair vacuum
r .
ePair or rePlace
r ,
ePair as required adjust
r .
ePair
r .
educe load
a .
dd unit or rePlace
r
educe or change location
l
ower entering air temPerature
™
.
,
adjust rePair or
.
.
. r
ePair or rePlace
.
, .
recharge
.
.
.