Quincy Compressor QSD 65040-AB Instruction Manual page 79

Probable Causes:
Thermal Overload Relays Tripping:
L
OOSE SIGNAL WIRE FROM OVERLOAD
I
NCORRECT THERMAL OVERLOAD RELAY
SETTING
L
OOSE MOTOR OR STARTER WIRING
LOW VOLTAGE
F
AULTY MOTOR
Low Delivery Pressure:
P
LUGGED AIR INTAKE FILTER
E - E
XCESSIVE DEMAND
E
XCESSIVE LEAKS IN SERVICE LINES
F
AULTY LINE PRESSURE TRANSDUCER
High Interstage Pressure:
B
LOWDOWN VALVE NOT RELIEVING
PRESSURE
A
IR PRESSURE SWITCH NOT SET
(O
CORRECTLY PERATING IN
M )
ODE
Corrective Action:
( ) C
S HECK SIGNAL WIRE CONNECTIONS
C
HECK MOTOR NAMEPLATE AND COMPARE TO OVERLOAD RELAY
SETTING SPECIFICATIONS
C
HECK ALL CONNECTIONS FOR TIGHTNESS
C
HECK VOLTAGE AND AMPERAGES WHILE OPERATING THE UNIT
AT FULL LOAD AND FULL PRESSURE
+10%.
C
HECK MOTOR STARTER WIRING BEFORE REMOVING MOTOR
R
EMOVE MOTOR AND HAVE TESTED AT AUTHORIZED MOTOR
MANUFACTURER REPAIR CENTER
R
EPLACE AIR FILTER ELEMENT
A
XCEEDS SUPPLY DD ADDITIONAL COMPRESSORS AS NEEDED
L
OCATE AND ELIMINATE AIR LEAKS IN SERVICE LINES
C
ONTACT AN AUTHORIZED
C
HECK CONTROL SOLENOID AND BLOWDOWN VALVE
R
EADJUST THE AIR PRESSURE SWITCH SO THAT THE UNLOAD
B -
ACK UP PRESSURE DOES NOT EXCEED THE MAXIMUM RECOMMENDED
OPERATING PRESSURE
Quincy Compressor
Section IX - Troubleshooting
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Q
UINCY SERVICE TECHNICIAN
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- QSD™
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AXIMUM TOLERANCE
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