Troubleshooting - Quincy QGB Series Instruction Manual

Integrated Dryer Troubleshooting
(continued):
Unit runs but low air pressure:
s .
ystem Pressure low
P /
recooler and or evaPorator clogged
i .
ncorrect PiPing
a .
ir overload
u .
nit too small
e .
xcess water in unit
Integrated Dryer Troubleshooting
(continued):
Unit runs but low air pressure:
e - .
vaPorator freeze uP
c
logged air comPressor intake filter
d .
irty air system
Unit runs, but air flow erratic or
zero:
f - .
reeze uP
P /
recooler and or evaPorator clogged
r
estriction in PiPing uPstream from unit
Evaporator freeze-up:
h
ot gas ByPass valve out of adjustment
Section VIII - Troubleshooting
i
ncrease Pressure
. B -
ack flush as descriBed in
i
ncrease line size and
required
r
educe overload
a
dd another unit or rePlace with larger unit
c
heck drain
a
djust hot gas ByPass valve
. c
lean or rePlace air intake filter
B -
ack flush as descriBed in
c
heck suction temPerature at evaPorator
outlet or turn off unit and allow it to thaw
to determine if this is ProBlem
-
at no load if freezing is occurring
. B -
ack flush as descriBed in
. c
orrect as required
. a
djust suction Pressure
.
valve
Quincy Compressor-QGB
.
s
ection
/
or correct PiPing as
.
.
,
rePair or rePlace if needed
.
s
ection
. a
s
ection
.
. a
djust hot gas ByPass
™
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v.
.
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v.
djust controls
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83