Section VIII - Troubleshooting
Symptom/Probable Causes:
Corrective Action:
Quincy Compressor
®
- QSB/T
™
57
High Receiver Pressure:
A
IR
PRESSURE
SWITCH
NOT
SET
CORRECTLY
I
NLET
VALVE
NOT
CLOSING
AT
LOWER
AIR
DEMAND
B
LOWDOWN
VALVE
NOT
RELIEVING
RECEIVER
PRESSURE
High Discharge Air Temperature and/or High
Fluid Injection Temperature:
N
OT
ENOUGH
COOLING
WATER
FLOWING
THROUGH
COOLER
(
WATER
-
COOLED
MODELS
ONLY
)
I
NADEQUATE
CIRCULATION
OF
COOLING
AIR
AT
THE
COOLER
(
AIR
-
COOLED
MODELS
ONLY
)
L
OW
FLUID
LEVEL
IN
RESERVOIR
C
ABINET
PANELS
REMOVED
C
OOLER
PLUGGED
F
LUID
FILTER
PLUGGED
E
XCESSIVE
AMBIENT
TEMPERATURES
I
NCORRECT
FAN
ROTATION
A
DJUST
AIR
PRESSURE
SWITCH
TO
ACHIEVE
DESIRED
CUT
-
IN
AND
CUT
-
OUT
PRESSURE
. E
NSURE
UNLOAD
PRESSURE
DOES
NOT
EXCEED
MAXIMUM
OPERATING
PRESSURE
.
C
ORRECT
IN
ACCORDANCE
WITH
INSTRUCTION
ON
“I
NLET
V
ALVE
NOT
OPENING
OR
CLOSING
IN
RELATION
TO
AIR
DEMAND
”
SECTION
OF
THIS
TROUBLESHOOTING
GUIDE
.
C
HECK
CONTROL
SOLENOID
AND
BLOWDOWN
VALVE
.
C
LEAN
COOLER
. C
HECK
WATER
SYSTEM
FOR
POSSIBLE
RESTRICTIONS
,
INCLUDING
WATER
TEMPERATURE
REGULATING
VALVE
. C
LEAN
OR
ADJUST
,
IF
NECESSARY
.
C
HECK
LOCATION
OF
COOLER
AND
ASSURE
NO
RESTRICTION
TO
FREE
CIRCULATION
OF
COOLING
AIR
. C
HECK
COOLER
FIN
AND
CLEAN
AS
NECESSARY
.
A
DD
FLUID
TO
RECOMMENDED
LEVEL
. C
HECK
FLUID
SYSTEM
FOR
LEAKS
.
R
EPLACE
ALL
PANELS
,
ENSURE
ALL
SEALING
SURFACES
AND
MATERIALS
ARE
SATISFACTORY
.
C
LEAN
COOLER
,
FIND
AND
CORRECT
CAUSE
OF
CONTAMINATION
.
R
EPLACE
FLUID
FILTER
ELEMENT
(
S
).
M
AXIMUM
AMBIENT
FOR
PROPER
OPERATION
IS
LISTED
IN
DATA
SHEET
. V
ENTILATE
ROOM
OR
RELOCATE
COMPRESSOR
.
C
ORRECT
ROTATION
IS
WITH
THE
FAN
PUSHING
THE
AIR
THROUGH
THE
COOLER
. R
EVERSE
MOTOR
STARTER
LEADS
L
1
AND
L
2
.
Summary of Contents for QSB Series
Page 2: ......
Page 9: ...Section I General Quincy Compressor QSB T 5 MODEL IDENTIFICATION...
Page 21: ...Quincy Compressor QSB T 17 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 27: ...Quincy Compressor QSB T 23 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 71: ...Quincy Compressor QSB T 67 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 72: ...Appendix A Dimensional Drawings 68 Quincy Compressor QSB T QSB 15 50 HP air cooled...
Page 73: ...Appendix A Dimensional Drawings Quincy Compressor QSB T 69 QSB 15 50 HP water cooled...