Section Ix - Troubleshooting - Quincy Compressor QSI Series Instruction Manual

Probable Causes:
Inlet Valve Not Opening Or Closing In Relation To Air Demand:
I
MPROPER SETTING OF AIR PRESSURE SWITCH OR
FAULTY SWITCH
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 SWITCH SETTING
F
AULTY AIR PRESSURE SWITCH
F
AULTY BLOW DOWN VALVE
F
AULTY SOLENOID VALVE
F
AULTY DIFFERENTIAL PILOT VALVE
L
EAKS IN CONTROL LINES
L
EAKS IN SERVICE LINES
Corrective Action:
A
DJUST AIR PRESSURE SWITCH TO PROPER SETTING
OR REPLACE SWITCH
S
ERVICE CONTROL AIR LINE FILTER DAILY
C
HECK PISTON AND CYLINDER BORE
REPLACE AS NEEDED
C
HECK AIR INLET VALVE BUSHING AND SHAFT
C
HECK PISTON AND CYLINDER BORE
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 SWITCH
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 TUBINGS
C
HECK LINES BEFORE
Quincy Compressor-QSI

Section IX - Troubleshooting

, .
IF FAULTY
.
.
.
.
.
MPC
VALVE
®
.
. R
EPAIR OR
.
. R
EPAIR OR
.
.
.
.
.
.
.
.
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