Quinny 65040-AB manual Probable Causes Corrective Action Unscheduled Shutdown

Section IX - Troubleshooting

Probable Causes:	Corrective Action:
Unscheduled Shutdown (continued):
HIGH PRESSURE DIFFERENTIAL	CHECK LIFT VALVE, BLOWDOWN VALVE AND MINIMUM PRESSURE
	CHECK VALVE OPERATION.
	CONTACT AN AUTHORIZED QUINCY SERVICE TECHNICIAN FOR
	REPAIRS.
COOLANT FLOW SWITCH OPEN	CHECK COOLANT SHUT-OFF VALVE AND WATER SUPPLY.
THERMAL MOTOR OVERLOAD RELAYS	CORRECT THE CAUSE OF THE MOTOR OVERLOADED CONDITION,
TRIPPING	RESET THE OVERLOAD RELAY AND PRESS THE RESET BUTTON.
INCORRECT THERMAL OVERLOAD RELAY	CHECK MOTOR NAMEPLATE AND COMPARE TO OVERLOAD RELAY
SETTING	SETTING.
LOOSE OVERLOAD CONNECTION	TIGHTEN MOUNTING SCREWS ON THERMAL OVERLOAD.
LOOSE WIRE CONNECTIONS	CHECK ALL WIRING TERMINALS FOR CONTACT AND TIGHTNESS.
POWER FAILURE	CHECK POWER SUPPLY AND TRANSFORMER FUSES.
	CHECK THE POWER SUPPLY, POWER SUPPLY CABLES AND RIBBON
	CABLE GOING TO DISPLAY BOARD.
LOW VOLTAGE	CHECK VOLTAGE AND AMPERAGES WHILE OPERATING AT FULL
	LOAD PRESSURE.
FAULTY CONTROL RELAY	REPLACE RELAY.
FAULTY MOTOR	CHECK MOTOR STARTER WIRING BEFORE REMOVING MOTOR.
	REMOVE MOTOR AND HAVE TESTED AT MOTOR MANUFACTURER
	REPAIR CENTER.
FAULTY OR DISCONNECTED RTD	CHECK WIRE CONNECTION BETWEEN RESISTANCE TEMPERATURE
	DETECTOR AND MICROPROCESSOR BOARD. IF RTD
	PERFORMANCE IS QUESTIONABLE, CONTACT AN AUTHORIZED
	QUINCY SERVICE TECHNICIAN.
FAULTY OR DISCONNECTED PRESSURE	CHECK WIRE CONNECTIONS OF PRESSURE SENSORS.
SENSORS	REPLACE SENSORS.
MOTOR OVERLOAD	CORRECT THE CAUSE OF THE OVERLOAD CONDITION. RESET THE
	OVERLOAD RELAY AND PRESS ENTER.
REVERSE ROTATION	CHECK FOR PROPER AIREND ROTATION.
	REDUCE “RAMP” TIME ON REMOTE LOW VOLTAGE OR SOLID
	STATE STARTERS.

72 Quincy Compressor® - QSD™