Quincy Compressor QSD 65040-AB, Instruction Manual, Page: 77 / 86

Section IX - Troubleshooting
Probable Causes: Corrective Action:
Quincy Compressor ® - QSD™
75
C
HECK AND TIGHTEN WIRING TERMINALS
.
R
EPAIR OR REPLACE AS NECESSARY
.
R
EPAIR OR REPLACE AS NECESSARY
.
C
HECK AND REPLACE TIMER
.
R
EPAIR OR REPLACE AS NECESSARY
.
N
O AIR SHOULD BE BLOWING OUT FROM THE MUFFLERS DURING
LOADED OPERATION
.
C
HECK AND RESET SEQUENCE OR SCHEDULE AS NECESSARY
.
C
HECK AND REPAIR ANY LEAKS
.
C
HECK PLANT AIR DISTRIBUTION SYSTEM FOR LEAKS
.
A
DD MORE STORAGE CAPACITY AS CLOSE TO THE COMPRESSOR
AS POSSIBLE
.
R
EPAIR OR REPLACE AS NECESSARY
.
R
EPAIR OR REPLACE AS NECESSARY
.
R
EPLACE AS NECESSARY
.
C
HECK AND REPAIR ANY LEAKS
.
D
RAIN LINES
,
REPLACE AS NECESSARY
.
R
EPLACE AS NECESSARY
.
A
DD STORAGE CAPACITY
(
MINIMUM OF THREE GALLONS PER
CFM).
Compressor does not revert to Load when Service Line Pressure Drops to Reset Pressure:
L
OOSE WIRING CONNECTION
F
AULTY PRESSURE SENSOR
F
AULTY SOLENOID
F
AULTY TIMER
F
AULTY LIFT VALVE
(
S
)
F
AULTY BLOWDOWN VALVE
(
S
)
N
ETWORK OUT OF SEQUENCE OR
SCHEDULE
Compressor Will not Time out or Shut down when Unloaded (Auto Dual Only):
L
EAKS IN CONTROL LINES
L
EAKS IN SERVICE LINES
S
TORAGE CAPACITY TOO SMALL
LEAKS IN MINIMUM PRESSURE CHECK
VALVE
F
AULTY AIR PRESSURE SWITCH
F
AULTY AIR PRESSURE SENSORS
Too Rapid Cycling Between Load and Unload:
L
EAKS IN CONTROL LINES
W
ATER OR ICE IN CONTROL LINES
F
AULTY AIR PRESSURE SENSORS
S
TORAGE CAPACITY TOO SMALL