Quincy Compressor QSD 65040-AB, Instruction Manual, Page: 73 / 86

Section IX - Troubleshooting
Probable Causes: Corrective Action:
Quincy Compressor ® - QSD™
71
Failure to Start (continued):
R
ELAY BOARD COMMUNICATION FAILURE
S
AFETY CIRCUIT SHUTDOWN
E
MERGENCY STOP BUTTON PRESSED
F
AULTY START BUTTON
L
OOSE WIRE CONNECTIONS
H
IGH DISCHARGE PRESSURE
C
ONTACTOR NOT ENGAGING
Unscheduled Shutdown:
H
IGH AIR DISCHARGE TEMPERATURE
S
AFETY CIRCUIT SHUTDOWN
F
AULTY
HAT
SENSORS
E
XCESSIVE DISCHARGE PRESSURE
L
OW FLUID PRESSURE
C
HECK CABLE AND CONNECTION ENDS OF COMMUNICATION
CABLE BETWEEN RELAY BOARD AND MICROPROCESSOR
.
U
NPLUG AND THEN PLUG THE CONNECTOR BACK IN AT THE
RELAY BOARD AND AT THE MICROPROCESSOR BOARD
.
C
ONTACT AN AUTHORIZED
Q
UINCY SERVICE TECHNICIAN
.
D
IAGNOSE CAUSE IN ACCORDANCE WITH THE INSTRUCTIONS ON
THE
LED
DISPLAY
. C
ORRECT CAUSE AND RESTART
COMPRESSOR
.
R
ESET EMERGENCY STOP BUTTON AND START COMPRESSOR
.
C
HECK FOR FAILURE OF THE
HAT
PROBE
(
S
).
C
HECK FOR FAILURE OF THE COOLANT FLOW SWITCH
.
C
HECK THE BUTTON FOR MALFUNCTION OR LOOSE CONNECTIONS
.
C
HECK ALL WIRING TERMINALS FOR CONTACT AND TIGHTNESS
.
C
OMPRESSOR WILL START WHEN STAGE
2
DISCHARGE PRESSURE
DROPS BELOW
10 PSIG.
C
HECK CONTROL WIRE CONNECTIONS
. C
HECK FOR POWER TO
CONTACTOR COIL
. C
HECK SIGNAL WIRES FROM CONTACTOR
AUXILIARY CONTACTS
.
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
.
D
IAGNOSE CAUSE IN ACCORDANCE WITH THE INSTRUCTIONS ON
THE
LED
DISPLAY
. C
ORRECT CAUSE AND RESTART
COMPRESSOR
.
C
ONTACT AN AUTHORIZED
Q
UINCY SERVICE TECHNICIAN FOR
REPAIRS
.
L
OWER FULL LOAD PRESSURE SETTING AT CONTROL PANEL
.
C
HECK FLUID FILTER AND FLUID PUMP FOR PLUGGING
. C
HECK
FLUID SUPPLY TEMPERATURE AT INLET TO FLUID PUMP FOR
FOULED COOLER
.