Section VII - Troubleshooting
Inlet Valve Not Opening Or Closing In
Relation To Air Demand:
I
MPROPER
PRESSURE
SETTING
OR
FAULTY
SENSOR
E
XCESSIVE
MOISTURE
IN
CONTROL
AIR
LINE
AT
AIR
CYLINDER
I
MPROPER
FUNCTIONING
OF
INLET
VALVE
PISTON
J
AMMED
AIR
INLET
VALVE
ASSEMBLY
F
AULTY
SOLENOID
VALVE
F
AULTY
SHUTTLE
VALVE
L
OOSE
WIRING
CONNECTIONS
AT
SOLENOID
VALVE
/
PRESSURE
SWITCH
B
ROKEN
SPRING
IN
AIR
INLET
VALVE
Compressor Does Not Unload When There Is
No Air Demand:
I
NCORRECT
AIR
PRESSURE
SETTING
F
AULTY
AIR
PRESSURE
SENSOR
F
AULTY
BLOWDOWN
VALVE
F
AULTY
SOLENOID
VALVE
F
AULTY
DIFFERENTIAL
PILOT
VALVE
L
EAKS
IN
CONTROL
LINES
L
EAKS
IN
SERVICE
LINES
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
A
DJUST
AIR
PRESSURE
SETTING
OR
REPLACE
SENSOR
,
IF
FAULTY
.
S
ERVICE
CONTROL
AIR
LINE
FILTER
DAILY
.
C
HECK
PISTON
AND
CYLINDER
BORE
. R
EPAIR
OR
REPLACE
AS
NEEDED
.
C
HECK
AIR
INLET
VALVE
BUSHING
AND
SHAFT
. C
HECK
PISTON
AND
CYLINDER
BORE
. R
EPAIR
OR
REPLACE
AS
NEEDED
.
R
EPAIR
OR
REPLACE
AS
NECESSARY
.
R
EPAIR
OR
REPLACE
AS
NECESSARY
.
C
HECK
AND
TIGHTEN
WIRING
TERMINALS
.
R
EPLACE
SPRING
.
A
DJUST
TO
PROPER
SETTING
.
R
EPLACE
SENSOR
.
R
EPAIR
OR
REPLACE
AS
NECESSARY
.
R
EPAIR
OR
REPLACE
AS
NECESSARY
.
R
EPAIR
OR
REPLACE
AS
NECESSARY
.
C
HECK
ALL
CONTROL
LINE
FITTINGS
AND
TUBING
.
C
HECK
LINES
BEFORE
MPC
VALVE
.
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
.
64
Summary of Contents for QGV-20
Page 2: ......
Page 70: ...Appendix A Dimensional Drawings QSI 90 120 140 micro 66...
Page 71: ...Appendix A Dimensional Drawings QSI 90 120 140 micro dry 67...
Page 72: ...Appendix A Dimensional Drawings QSI 90 120 140 micro tank mounted 68...
Page 73: ...Appendix A Dimensional Drawings QSI 90 120 140 micro dry tank mounted 69...
Page 74: ...Appendix A Dimensional Drawings QSI 90 120 140 guage 70...
Page 75: ...Appendix A Dimensional Drawings QSI 90 120 140 guage dry 71...
Page 76: ...Appendix A Dimensional Drawings QSI 90 120 140 guage tank mounted 72...
Page 77: ...Appendix A Dimensional Drawings QSI 90 120 140 guage dry tank mounted 73...
Page 78: ...Appendix A Dimensional Drawings QGV 20 25 30 460V 74...
Page 79: ...Appendix A Dimensional Drawings QGV 20 25 30 460V dry 75...
Page 80: ...Appendix A Dimensional Drawings QGV 20 25 30 460V tank mounted 76...
Page 81: ...Appendix A Dimensional Drawings QGV 20 25 30 460V dry tank mounted 77...
Page 91: ......