User guide

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Corporate Office: 724.584.5500  Instant Access 24/7 (Parts and Service): 800.458.1960  Parts and Service: 814.437.6861
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AutostartSignalLED...................................................................................................................26
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PumpLED...................................................................................................................................26
HotGasBypassLED....................................................................................................................26
Compressor#1LED....................................................................................................................27
Compressor#2LED....................................................................................................................27
TemperatureLimitLED...............................................................................................................27
ElectricalPhaseErrorLED..........................................................................................................28
LowFlowLED..............................................................................................................................28
FreezestatLED............................................................................................................................28
LowReservoirLevelLED.............................................................................................................28
CompressorRecycleLED............................................................................................................28
HighRefrigerantPressureLED...................................................................................................28
LowRefrigerantPressureLED....................................................................................................29
ProgramModeLED....................................................................................................................29
SetpointTemperatureDisplay...................................................................................................29
ActualTemperatureDisplay.......................................................................................................29
ProgramMenu...........................................................................................................................29
Table4‐ControllerProgramMenu........................................................................................31
Table5–ControllerControlFaultLogic.................................................................................32
Table6–ModBusOptionParameters(IntegerValues).........................................................33
Table7–ModBusOptionParameters(FloatingPointValues)..............................................34
PLCControllerNavigation......................................................................................................36
Start‐UpScreen&ConairContactInformation.........................................................................36
MainScreen................................................................................................................................36
RefrigerationDiagnosticScreen.................................................................................................38
ProcessDiagnosticScreen..........................................................................................................39
ActiveAlarmsScreen/AlarmHistory........................................................................................40
OutputStatus/OutputDesignation..........................................................................................42
SetupScreens.............................................................................................................................43
CompressorSetup...................................................................................................................43
TemperatureAlarmSettings..................................................................................................43
FreezestatSetup.....................................................................................................................43
HotGasBypassPID.................................................................................................................43
Components..........................................................................................................................44
ChilledWaterReturnTemperatureSensor................................................................................44
ChilledWaterSupplyTemperatureSensor................................................................................44
Compressor................................................................................................................................44
CompressorElectronicMotorModule......................................................................................44
CondenserRemoteAir‐Cooled(EP2RModelsOnly)..................................................................45
CondenserIntegratedAir‐Cooled(EP2AModelsOnly).............................................................45
FanCyclingControls(EP2AModelsOnly)..................................................................................45
CondenserWater‐Cooled(EP2WModelsOnly)........................................................................45
CondenserWaterRegulatingValve(EP2WModelsOnly).........................................................45