Siemens 125-5050 Chaper 4 Troubleshooting, Basic Service Information, Preventive Maintenance

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Chaper 4 – Troubleshooting

Chaper 4 – Troubleshooting

This chapter describes corrective measures you can take should you encounter a problem when using a BACnet ATEC.

You are not required to do any controller troubleshooting. You may want to contact your local Siemens Industry representative if a problem occurs or you have any questions about the controller.

NOTE:

When troubleshooting, record what the problem is and what actions were performed immediately before the problem occurred. Being able to describe the problem in detail is important, should you need assistance from your local Siemens Industry representative.

Basic Service Information

Always remove power to the BACnet ATEC when installing or replacing it. Since the controller does not have a power switch, the recommended method of removing power to a locally powered controller is to turn OFF the power to the 24 Vac transformer. The recommended method of removing power to a controller on a power cable (even to service a single controller) is to turn OFF the power at the transformer.

NOTE:

When removing power to a controller to perform maintenance or service, make sure that the person in charge of the facility is aware of this and that appropriate steps are taken to keep the building in control.

Never remove the cover from the BACnet ATEC. There are no serviceable parts inside. If a problem is found with this device, contact your local Siemens Building Technologies representative for replacement. An anti-static wrist strap is recommended when installing or replacing controllers.

Preventive Maintenance

Most controller components are designed so that, under normal circumstances, they do not require preventive maintenance. Periodic inspections, voltage checks, and point checks are normally not required. The rugged design makes most preventive maintenance unnecessary. However, devices that are exposed to dusty or dirty environments may require periodic cleaning to function properly.

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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 BACnet Atec Siemens Industry, IncPage Service Statement Copyright NoticeFCC Regulations To the Reader CreditsTable of contents Using the Controller as a Point Extension Device How To Use This Manual Manual OrganizationManual Conventions Manual Symbols Where to Send CommentsGetting Help BACnet Atec Electronic Output Applications Product OverviewOrdering Notes Application DescriptionAnalog Hardware InputsHardware Outputs DigitalPower Wiring ApplicationController LEDs Communication WiringController LED Indicators IndicationDuct Temperature Sensor Temperature SensorsRoom Temperature Sensor Related EquipmentApplications Basic OperationDamper Status Operation Heating and Cooling SwitchoverCalibration Fail-safe OperationModulate Damper During Heating Mode optional Hot Water ReheatElectric Reheat Application 2860 VAV Cooling Only Application 2861 VAV Cooling or HeatingApplication 2863 VAV with Hot Water Reheat Baseboard RadiationElectric Heat Interlock Application 2864 VAV Series Fan Powered with Electric Reheat Fan OperationInsert TEC2564CD Insert TEC2566CD Using the Controller as a Point Extension Device Application 2897 Slave ModeUsing Auxiliary Points Insert TEC2567CDApplications Point Database Descriptor Address Application DescriptionDescriptor Address1 Descriptor Address1 Application Description VLV1 POS MTR SetupVLV POS MTR2 TimingFlow Switch LimitSwitch Time CTL Flow MINCAL Timer Switch DbandCAL Setup SetupChaper 4 Troubleshooting Basic Service InformationPreventive Maintenance Safety Features Controller LEDsGlossary Lps Override switchField panel LoopoutTerminal Equipment Controller Slave modeStand-alone control UnbundleIndex Duct temperature sensor, 15 RTS Index Communication wiring Wiring Power wiring 125-5050, Rev. AA