Section VIII - Troubleshooting
Symptom/Probable Causes:
Corrective Action:
Quincy Compressor
®
- QSB/T
™
55
Unscheduled Shutdown:
H
IGH
DISCHARGE
AIR
TEMPERATURE
T
HERMAL
MOTOR
OVERLOAD
RELAYS
TRIPPING
P
OWER
FAILURE
F
AULTY
HAT
SENSORS
L
OOSE
WIRE
CONNECTIONS
F
AULTY
CONTROL
RELAY
Thermal Overload Relays Tripping:
E
XCESSIVE
DISCHARGE
PRESSURE
L
OW
VOLTAGE
L
OOSE
OVERLOAD
CONNECTION
I
NCORRECT
THERMAL
OVERLOAD
RELAY
SETTING
L
OOSE
MOTOR
OR
STARTER
WIRING
F
AULTY
MOTOR
C
ORRECT
THE
SITUATION
IN
ACCORDANCE
WITH
THE
INSTRUCTION
IN
THE
“H
IGH
D
ISCHARGE
A
IR
T
EMPERATURE
”
SECTION
OF
THIS
TROUBLESHOOTING
GUIDE
. R
ESTART
THE
COMPRESSOR
.
C
ORRECT
THE
CAUSE
OF
THE
MOTOR
OVERLOADED
CONDITION
,
RESET
THE
OVERLOAD
RELAY
AND
PRESS
THE
RESET
BUTTON
.
C
HECK
POWER
SUPPLY
AND
TRANSFORMER
FUSES
.
C
ONTACT
A
QUALIFIED
SERVICE
TECHNICIAN
FOR
REPAIRS
.
C
HECK
ALL
WIRING
TERMINALS
FOR
CONTACT
AND
TIGHTNESS
.
R
EPLACE
RELAY
.
L
OWER
FULL
LOAD
PRESSURE
SETTING
AT
CONTROL
PANEL
.
C
HECK
VOLTAGE
AND
AMPERAGES
WHILE
OPERATING
AT
FULL
LOAD
PRESSURE
.
T
IGHTEN
MOUNTING
SCREWS
ON
THERMAL
OVERLOAD
.
C
HECK
MOTOR
NAMEPLATE
AND
COMPARE
TO
OVERLOAD
RELAY
SETTING
.
C
HECK
ALL
CONNECTIONS
FOR
TIGHTNESS
.
C
HECK
MOTOR
STARTER
WIRING
BEFORE
REMOVING
MOTOR
. R
EMOVE
MOTOR
AND
HAVE
TESTED
AT
MOTOR
MANUFACTURER
REPAIR
CENTER
.
Summary of Contents for QSB Series
Page 2: ......
Page 9: ...Section I General Quincy Compressor QSB T 5 MODEL IDENTIFICATION...
Page 21: ...Quincy Compressor QSB T 17 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 27: ...Quincy Compressor QSB T 23 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 71: ...Quincy Compressor QSB T 67 THIS PAGE INTENTIONALLY LEFT BLANK...
Page 72: ...Appendix A Dimensional Drawings 68 Quincy Compressor QSB T QSB 15 50 HP air cooled...
Page 73: ...Appendix A Dimensional Drawings Quincy Compressor QSB T 69 QSB 15 50 HP water cooled...