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SterlingTEK A0551797 manual 10Troubleshooting, Problem Possible Cause Solution

Models: A0551797

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10Troubleshooting

Problem	Possible Cause	Solution
	No power.	Check main disconnect,
	No power.	fuses, wiring, and power lead
		to unit.
	Wrong voltage supplied to	Voltage must be within plus
	Wrong voltage supplied to	or minus ten percent (±10%)
	unit.	or minus ten percent (±10%)
	unit.	of nameplate rating.
		of nameplate rating.
	Defective On/Off switch.	Replace switch.
		Replace fuse, check
		transformer, check wiring for
	Control circuit fuse blown.	loose wires, check for shorted
	Control circuit fuse blown.	coils on contactors and
		coils on contactors and
Unit does not run.		solenoids, check crankcase
		heater.
	Defective control transformer.	Replace.
	Flow switch circuit is open.	Check pump for proper
	Flow switch circuit is open.	rotation.
		rotation.
	Pump motor off on overload.	Reset and test motor.
		Check that the chiller pump is
	Unit is off on flow switch or	running.
	Unit is off on flow switch or	Check that all valves are
	pressure switch.	open.
		Check for defective flow
		switch or pressure switch.
	Freeze control set higher than	Lower freeze control setting
	Freeze control set higher than	to 10°F (6ºC) below the
	temperature of liquid in	to 10°F (6ºC) below the
	temperature of liquid in	leaving temperature you
	system.	leaving temperature you
	system.	want.
		want.
		Air cooled units: Check and
		clean air filters. Check
		condenser fans for proper
Pump runs,		rotation. Check for dirty
Pump runs,		condenser. Check for
compressor does not.	High pressure refrigerant	condenser air obstruction.
	High pressure refrigerant	Check for tripped motor
	cutout switch contacts open.	overload, blown fuses, or bad
		condenser fan motor.
		Water cooled units: Check for
		water valves turned on.
		Check for dirty condenser.
		Check water flow through
		condenser.

SSC Series Central Chilling Stations

Page 77 of 86

Image 77

SterlingTEK A0551797 manual 10Troubleshooting, Problem Possible Cause Solution

Contents

SSC Series Central Chilling Stations SSC Series Central Chilling Stations Wear Safety Glasses and Work Gloves Safety ConsiderationsTable of Contents Getting Started on the SSC Series Advanced Touchscreen Startup ChecklistsCharts and Figures Necessary Documents IntroductionModels Covered Standard FeaturesAvailable Options Standard Features on Remote CondensersModel Number Nomeclature Model SSCW-xxx Typical Two-Circuit 60-100 Ton Water Cooled ChillerCooling Capacity tons @ 50F 10 C LWT 73.1 81.4 Model SSCR-xxx Typical Two-Circuit 60-100 Ton Remote Air Cooled ChillerSscr Series Remote Condenser Models Event of Shipping Damages Unpacking and InspectionReturns If the Shipment is Not CompleteIf the Shipment is Not Correct Uncrating Your New Chiller SSC Series Central Chilling Stations Making Electrical Connections 3InstallationInstallation Location Considerations SSC Series Central Chilling Stations All Models Piping ConsiderationsMaking Process Water Connections From Process Making Tank Piping ConnectionsGalvanic Corrosion Considerations Water Connection Sizing ConsiderationsWater Treatment Considerations Making Water-Cooled Condenser ConnectionsCondenser Water Installing the Remote Air-Cooled CondenserCompressor Checking Motor DirectionSSC Series Central Chilling Stations Staging AlarmsLead-Lag Compressors Lead-Lag PumpsFreezestat Control Chilled Water CircuitRefrigeration Circuit Freezing Protection Curve VolumeLow Pressure Cutout Flow SwitchHigh Pressure Cutout Control Probe Control NippleChilled Water Manifold Condenser Water ManifoldSSC Series Central Chilling Stations Water-Cooled SSC Series Startup Checklist Startup ChecklistsSSC Series Central Chilling Stations Water-Cooled SSC Series Startup Remote Air-Cooled SSC Series Startup ChecklistSSC Series Central Chilling Stations Remote Air-Cooled SSC Series Startup Shutdown Determining Flow RateSSC Series Central Chilling Stations SSC Series Central Chilling Stations Graphic Panel Devices Indicator Lights and Control Switches MMISSC Series Central Chilling Stations Touchscreen Interface Introduction MMI Using the StandardTouchscreen Interface SSC Series Standard Control Panel Using the SSC Series Standard Touchscreen InterfaceMain Menu Screen Compressor Status Screen Viewing and Operating Chiller CompressorsViewing Compressor Status Operating the chiller compressors Chiller Configuration ScreenCompressor Lead/Lag Screen Compressor Enable ScreenCompressor Run Time Display Screen Viewing Compressor Run TimesPump Status Screen Viewing and Operating Chiller PumpsViewing Chiller Pump Status Operating Chiller Pumps Pump Enables ScreenPump Run Time Display Screen Viewing Pump Run TimesPump Lead/Lag Screen Alarm Condition Screen Viewing Active Alarms and Handling Alarm ConditionsOr Death Setting System Temperatures Viewing and Setting System TemperaturesSSC Series Central Chilling Stations Using the Advanced Using the SSC Series Advanced Touchscreen Interface Main Menu Screen Viewing and Operating Chiller Compressors Chiller Status Screen Operating the chiller compressors Viewing Compressor Run Times Viewing and Operating Chiller Pumps Viewing Chiller Pump Status Operating Chiller Pumps Hourmeters Pump Run Time screen displays Viewing Active Alarms and Handling Alarm Conditions Alarm Condition Screen Or Death System Status Screen Temperature Input Display Screen Lubrication Condenser MaintenancePump Motor Seal Evaporator MaintenanceMakeup Valve Recommended Pump Tank Spare PartsPreventive Maintenance Service SSC Series Central Chilling Stations Problem Possible Cause Solution 10TroubleshootingAllow time to cool and reset Verify proper rotation if Service Notes Index Water Treatment Service Notes Service Notes Service Notes Sterling Th Street New Berlin, WI 262 641-8610 ∙ Fax 262 Parts Department