Sterling 882.93092.01 manual Sc/W

			Water cooled condenser valve		Verify cooling valve operation.
			stuck open
			Fan VFD output at 100%		Verify VFD is in remote versus
					manual operation. Verify
					controller output to VFD.
			Low process fluid flow		and adjust if necessary
					Verify system valve operation
Low Fluid Temp Fault	9	CC	Plugged Y-strainer		Clean y-strainer through blow-
					down valve or cleaning internal
					strainer.
			System low on refrigerant		Contact Customer Service
			Liquid line valves closed		controller and valve
					Verify wiring or output between
			Chilled fluid setpoint too		Adjust setpoint or fluid
Low Suction Pressure Fault	10	CC	close to freeze protection		freezepoint temperature (will
			setpoint.		require adding glycol to fluid)
			Process fluid flow rate too		Verify system valve operation
			low.		and adjust if necessary
			Thermal expansion valve		Contact Customer Service
			failure.
Low Superheat Fault (only will			Thermal expansion valve		Contact Customer
			failure
appear if optional sensor pack is	11	CC
			Temperature Sensor Failure		Verify sensor wiring between
installed)
					controller and sensor.
			Sensor failure		Check the wiring connection at
Suction Pressure Sensor Failure	12	CC	Electrical connection at
			sensor open		the sensor, and at the controller.
			Electrical connection at		If necessary replace sensor.
			controller open
			Sensor wires loose from		Check the wiring connection at
Leaving Water Temp Sensor	13	SC	controller terminal block		the controller terminal block
			sensor and controller terminal		Replace Sensor
Failure
			Sensor wires broke between
			block.
			Tank level too low		Add fluid if necessary.
					Verify tank level parameters.
Low Level Fault	14	SC
			Optional water makeup valve		controller and makeup valve.
			failure		Verify wiring between
					Replace valve if necessary
			Tank level sensor failure		Replace Sensor
			System valve(s) closed		operational and adjust.
					Verify that all system valves are
No Flow	15	SC
			Low flow sensor failure		and at the terminal block.
					Verify the sensor at the sensor
			Pump failure		Verify the operation of the
					pump (i.e. motor circuit
					protector or pump rotation)
CC = Compressor Critical	SC = System Critical			PC = Process Critical	W = Warning
Alarm Name	#	Type	Possible Cause		Solution
			Motor circuit protector open		Verify motor circuit protector
					operation. Verify motor wiring
Pump Overload	16	SC			and amp draw while under load.
					Verify system valves are
			Pump flow rate in excess of		operational and properly set.
					Contact customer service or
			capacity
					sales if pump is sized too small
					for application.
High Fluid Temp Fault	17	SC/W	Fluid temperature higher than		Verify parameter and adjust if
			parameter.		necessary.
			Refrigeration system fault		Check for any refrigeration

GP Series Portable Chillers Chapter 6: Troubleshooting 52 of 90