Quincy Compressor QSD 65040-AB Instruction Manual page 74

Section IX - Troubleshooting
Probable Causes:
Unscheduled Shutdown (continued):
H
IGH PRESSURE DIFFERENTIAL
C
OOLANT FLOW SWITCH OPEN
T
HERMAL MOTOR OVERLOAD RELAYS
TRIPPING
I
NCORRECT THERMAL OVERLOAD RELAY
SETTING
L
OOSE OVERLOAD CONNECTION
L
OOSE WIRE CONNECTIONS
P
OWER FAILURE
L
OW VOLTAGE
F
AULTY CONTROL RELAY
F
AULTY MOTOR
F D
AULTY OR ISCONNECTED
F D
AULTY OR ISCONNECTED
S
ENSORS
M O
OTOR VERLOAD
R R
EVERSE OTATION
72
Corrective Action:
C
HECK LIFT VALVE
CHECK VALVE OPERATION
C
ONTACT AN AUTHORIZED
REPAIRS
C
HECK COOLANT SHUT
C
ORRECT THE CAUSE OF THE MOTOR OVERLOADED CONDITION
RESET THE OVERLOAD RELAY AND PRESS THE RESET BUTTON
C
HECK MOTOR NAMEPLATE AND COMPARE TO OVERLOAD RELAY
SETTING
T
IGHTEN MOUNTING SCREWS ON THERMAL OVERLOAD
C
HECK ALL WIRING TERMINALS FOR CONTACT AND TIGHTNESS
C
HECK POWER SUPPLY AND TRANSFORMER FUSES
C
HECK THE POWER SUPPLY
CABLE GOING TO DISPLAY BOARD
C
HECK VOLTAGE AND AMPERAGES WHILE OPERATING AT FULL
LOAD PRESSURE
R
EPLACE RELAY
C
HECK MOTOR STARTER WIRING BEFORE REMOVING MOTOR
R
EMOVE MOTOR AND HAVE TESTED AT MOTOR MANUFACTURER
REPAIR CENTER
RTD C
HECK WIRE CONNECTION BETWEEN RESISTANCE TEMPERATURE
DETECTOR AND MICROPROCESSOR BOARD
PERFORMANCE IS QUESTIONABLE
Q
UINCY SERVICE TECHNICIAN
P C
RESSURE HECK WIRE CONNECTIONS OF PRESSURE SENSORS
R
EPLACE SENSORS
C
ORRECT THE CAUSE OF THE OVERLOAD CONDITION
OVERLOAD RELAY AND PRESS
C
HECK FOR PROPER AIREND ROTATION
R
EDUCE
STATE STARTERS
Quincy Compressor
,
BLOWDOWN VALVE AND MINIMUM PRESSURE
.
Q
UINCY SERVICE TECHNICIAN FOR
.
-
OFF VALVE AND WATER SUPPLY
.
,
POWER SUPPLY CABLES AND RIBBON
.
.
.
.
.
ENTER.
"R "
AMP TIME ON REMOTE LOW VOLTAGE OR SOLID
.
®
- QSD™
.
.
.
.
. I RTD
F
,
CONTACT AN AUTHORIZED
.
. R
ESET THE
.
,
.
.
.