SterlingTEK A0551797 manual 10Troubleshooting, Problem Possible Cause Solution

Page 77

10Troubleshooting

Problem

Possible Cause

Solution

 

No power.

Check main disconnect,

 

fuses, wiring, and power lead

 

 

to unit.

 

Wrong voltage supplied to

Voltage must be within plus

 

or minus ten percent (±10%)

 

unit.

 

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

 

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

 

rotation.

 

 

 

Pump motor off on overload.

Reset and test motor.

 

 

Check that the chiller pump is

 

Unit is off on flow switch or

running.

 

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

 

to 10°F (6ºC) below the

 

temperature of liquid in

 

leaving temperature you

 

system.

 

want.

 

 

 

 

Air cooled units: Check and

 

 

clean air filters. Check

 

 

condenser fans for proper

Pump runs,

 

rotation. Check for dirty

 

condenser. Check for

compressor does not.

High pressure refrigerant

condenser air obstruction.

 

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

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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
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