Compressor Does Not Unload When There Is No Air Demand; Compressor Does Not Revert To Load When Service Line Pressure Drops To Reset Pressure; Compressor Will Not Time-Out Or Shut Down When Unloaded (Auto/Dual Only); Excessive Water In Plant Air Distribution System - Quincy QGV-100 Instruction Manual

Probable Causes:
Compressor Does not unload
When there is no air Demand:
f
aulty blow down valve
l
eaks in service lines
Compressor Does not revert to
Load When Service Line Pressure
Drops to reset Pressure:
l
oose wiring connection
j
ammed air inlet valve assembly
Compressor Will not time-out or
Shut Down When unloaded (auto/
Dual only):
l
eaks in service lines
f
aulty air pressure sensors
excessive Water in Plant air
Distribution System:
c
logged moisture separator
i /a
nstallation pplication
f /
aulty cooler leaks

Pressure relief Valve exhausting:

p
lugged separator
f
aulty receiver pressure gauge
f
aulty pressure relief valve
Corrective action:
r
c
c
c
c
leaks
r
/ c
trap
c
r
r
c
necessary
c
pressure setting
replace it
Quincy Compressor-QGV Series
Section VII - Troubleshooting
epair or replace as necessary
mpc
heck lines before
heck and tighten wiring terminals
heck and repair air inlet valve
heck plant air distribution system for
.
.
eplace as necessary
lean or replace as required
heck other compressors on same system
.
eplace cooler
/
eplace with new air
heck gauge for accuracy and replace if
. a
djust control settings
heck pressure relief valve for correct
. i
f valve is still leaking
.
.
.
valve
.
.
.
.
fluid separator
.
,
.
67