Quincy Compressor QSD 65040-AB, Инструкция по эксплуатации, Страница: 79 / 86

Section IX - Troubleshooting
Probable Causes: Corrective Action:
Quincy Compressor ® - QSD™
77
Thermal Overload Relays Tripping:
L
OOSE SIGNAL WIRE FROM OVERLOAD
(
S
)
I
NCORRECT THERMAL OVERLOAD RELAY
SETTING
L
OOSE MOTOR OR STARTER WIRING
C
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
. M
AXIMUM TOLERANCE
+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
DD ADDITIONAL COMPRESSORS AS NEEDED
.
L
OCATE AND ELIMINATE AIR LEAKS IN SERVICE LINES
.
C
ONTACT AN AUTHORIZED
Q
UINCY SERVICE TECHNICIAN
.
C
HECK CONTROL SOLENOID AND BLOWDOWN VALVE
.
R
EADJUST THE AIR PRESSURE SWITCH SO THAT THE UNLOAD
PRESSURE DOES NOT EXCEED THE MAXIMUM RECOMMENDED
OPERATING PRESSURE
.
LOW VOLTAGE
F
AULTY MOTOR
Low Delivery Pressure:
P
LUGGED AIR INTAKE FILTER
E
XCESSIVE DEMAND
- E
XCEEDS SUPPLY
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
CORRECTLY
(O
PERATING IN
B
ACK
-
UP
M
ODE
)