Troubleshooting - Quincy QSI-90 Instruction Manual

Section VII - Troubleshooting
Failure to Start:
P "ON"
OWER NOT TURNED
B
LOWN CONTROL CIRCUIT FUSE
S
AFETY CIRCUIT SHUTDOWN RESULTING FROM HIGH DISCHARGE AIR
TEMPERATURE
T
HERMAL OVERLOAD RELAYS TRIPPING
L
OW VOLTAGE
F
AULTY START SWITCH
P
OWER FAILURE
L
OOSE WIRE CONNECTIONS
F
AULTY CONTROL RELAY
F H A T
AULTY IGH IR EMPERATURE
F
AULTY TRANSFORMER
Unscheduled Shutdown:
H
IGH DISCHARGE AIR TEMPERATURE
T
HERMAL MOTOR OVERLOAD RELAYS TRIPPING
P
OWER FAILURE
L
OOSE WIRE CONNECTIONS
F HAT
AULTY SENSORS
F
AULTY CONTROL RELAY
60
(HAT) S
WITCH
T "ON"
URN THE POWER BY CLOSING THE MAIN DISCONNECT
.
SWITCH OR CIRCUIT BREAKER
R . F
EPLACE FUSE IND AND CORRECT CAUSE
C
ORRECT THE SITUATION IN ACCORDANCE WITH THE
"H D
INSTRUCTION IN THE IGH
SECTION OF THIS TROUBLESHOOTING GUIDE
.
COMPRESSOR
C
ORRECT THE CAUSE OF THE OVERLOADED CONDITION
OVERLOAD RELAY AND PRESS THE START BUTTON
A
SK THE POWER COMPANY TO MAKE A VOLTAGE CHECK AT
,
YOUR ENTRANCE METER THEN COMPARE THAT READING TO A
READING TAKEN AT THE MOTOR TERMINALS
READINGS AS A BASIS FOR LOCATING THE SOURCE OF LOW
.
VOLTAGE
C
HECK THE SWITCH FOR MALFUNCTION OR LOOSE
.
CONNECTIONS
C
HECK POWER SUPPLY TO THE UNIT
C
HECK ALL WIRING TERMINALS FOR CONTACT AND TIGHTNESS
R .
EPLACE THE RELAY
C HAT . C
HECK SWITCH ONTACT A QUALIFIED SERVICE
.
TECHNICIAN FOR REPAIRS
C
HECK SECONDARY VOLTAGE ON TRANSFORMER
C
ORRECT THE SITUATION IN ACCORDANCE WITH THE
"H D
INSTRUCTION IN THE IGH
SECTION OF THIS TROUBLESHOOTING GUIDE
.
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
HECK ALL WIRING TERMINALS FOR CONTACT AND TIGHTNESS
C
ONTACT A QUALIFIED SERVICE TECHNICIAN FOR REPAIRS
R .
EPLACE RELAY
.
A T "
ISCHARGE IR EMPERATURE
. R
ESTART THE
,
RESET
.
. U
SE THESE TWO
.
.
A T "
ISCHARGE IR EMPERATURE
. R
ESTART THE
.
.
.
.
,
.