Siemens 125-5050 owner manual Safety Features, Controller LEDs

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Chaper 4 – Troubleshooting

Safety Features

The controller board stores the controller's address, applications, and point values. In the event of a power failure or a reset, these values are retrieved from the controller's permanent memory and are used by the controller unless overridden by a field panel. If one of the following conditions occurs, the controller will activate safety features present in its fail-safe mode.

Sensor failure.

Loss of power. Upon controller power loss, communication with the controller is also lost. The controller will appear as failed (*F*) at the field panel.

Controller LEDs

NOTE:

The TX and RX LEDs indicate communication over the FLN.

To determine if the controller is powered up and working, verify that the Basic Sanity Test (BST) Light Emitting Diode (LED) is flashing ON/OFF once per second. The controller contains seven LEDs located on the circuit board. See the Controller LED lndicators [ 12] section of Chapter 1 - Product Overview [ 9] for more information about LEDs.

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Siemens Industry, Inc.	BACnet ATEC Owner's Manaul
125-5050, Rev. AA	4/20/2010

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Contents Siemens Industry, Inc Siemens BACnet AtecPage Copyright Notice Service StatementFCC Regulations Credits To the ReaderTable of contents Using the Controller as a Point Extension Device Manual Organization How To Use This ManualManual Conventions Where to Send Comments Manual SymbolsGetting Help Application Description Product OverviewOrdering Notes BACnet Atec Electronic Output ApplicationsDigital Hardware InputsHardware Outputs AnalogApplication Power WiringIndication Communication WiringController LED Indicators Controller LEDsRelated Equipment Temperature SensorsRoom Temperature Sensor Duct Temperature SensorBasic Operation ApplicationsFail-safe Operation Heating and Cooling SwitchoverCalibration Damper Status OperationHot Water Reheat Modulate Damper During Heating Mode optionalElectric Reheat Application 2861 VAV Cooling or Heating Application 2860 VAV Cooling OnlyBaseboard Radiation Application 2863 VAV with Hot Water ReheatElectric Heat Interlock Fan Operation Application 2864 VAV Series Fan Powered with Electric ReheatInsert TEC2564CD Insert TEC2566CD Insert TEC2567CD Application 2897 Slave ModeUsing Auxiliary Points Using the Controller as a Point Extension DeviceApplications Descriptor Address Application Description Point DatabaseDescriptor Address1 Descriptor Address1 Application Description MTR2 Timing MTR SetupVLV POS VLV1 POSCTL Flow MIN Switch LimitSwitch Time FlowSetup Switch DbandCAL Setup CAL TimerBasic Service Information Chaper 4 TroubleshootingPreventive Maintenance Controller LEDs Safety FeaturesGlossary Loopout Override switchField panel LpsUnbundle Slave modeStand-alone control Terminal Equipment ControllerIndex Duct temperature sensor, 15 RTS Index Communication wiring Wiring Power wiring 125-5050, Rev. AA