Sterling A0554831 manual Graphic Panel, See Figure Indicator Name Description

Graphic Panel

(See Figure 8)

Indicator	Name		Description
	Compressor On		The Compressor On light turns on whenever the
	Light		compressor is operating.
	Low Temperature	The Low Temperature light comes on if the process
	Light	water/glycol temperature drops below the High/Low
		thermostat set point. The Low thermostat stage one
		switch opens the control circuit shutting down the
		compressor, but the process water/glycol pump(s)
		continue to operate. This action prevents possible
		chiller evaporator freeze-up.
	Hot Gas Bypass		The Hot Gas By-Pass light turns on when the hot
	Light		gas bypass valve is in operation. The OUT1 LED on
			the controller also lights when the hot gas bypass
			valve is in operation.
	High Temperature		The High Temperature light comes on if the process
	Light		water/glycol temperature rises above the High/Low
			thermostat stage two set point. The High thermostat
			stage two switch opens the control circuit shutting
			down the process water/glycol pump(s), and the
			chiller shuts off. This action prevents possible
			system failure from overheating of the process
			water/glycol.
	Pump On Light	The Pump On light, installed on chillers with a
			pump, lights whenever the pump(s) operates.
	High Discharge		The High Discharge Temperature light comes on if
	Temperature Light		the compressor discharge line temperature switch
			opens. This switch prevents possible compressor
			failure due to over loading, the compressor stops,
			but the pump(s) continue to run. This occurs when
			the discharge line temperature rises above 260ºF
			(127ºC). Call a qualified refrigeration service
			technician or contact the Service Department.
	Pump Overload		The Pump Overload light, installed on chillers with
	Light		a pump(s), lights whenever a pump motor(s) has
			shut down from a motor overload condition.
	High Refrigerant		The High Refrigerant Pressure light comes on if the
	Pressure Light		compressor discharge pressure exceeds the limit of
			the high pressure cutout switch. The compressor
			stops but the pump(s) continue to run until you
			manually reset the high-pressure cutout switch. Call
			a qualified refrigeration service technician or
			contact the Service Department.

2-40 HP Portable Chillers Chapter 4: Operation 32 of 70