Eaton ATC-900 Operation And Maintenance Manual

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IB140012EN For more information visit: www.eaton.comInstructional BookletEffective: March 2021 Page 31Operation and Maintenance Manual,Automatic Transfer Switch Controller, ATC-900Step 6: Make sure that the setpoints are set according to thesystem voltage.If YES: Proceed to Step 7.If NO: .Adjust system voltage setpoints to match sys-tem voltage and phase.Step 7: Is the Non-preferred switching device charged?If YES: Proceed to Step 8.If NO: Consult Magnum Breaker troubleshooting manualon how to charge the breaker before proceeding.Step 8: Is the Preferred switching device OPEN?If YES: Proceed to Step 10.If NO: Proceed to Step 9.Step 9: If this is a Magnum, measure the voltage between termi-nals B10 and B11 on the Preferred switching device(shunt trip). Is the voltage measured 120 Vac (+/- 10volts)? Record the reading.If YES: Refer to the Magnum Breaker maintenancemanual IB#2C12060 and check the shunt tripPreferred switch.If NO: Check the wiring to B10 and B11.Step 10: If this is a Magnum measure the voltage between termi-nals B12 and B13 on the Non-preferred switching device(spring release coil). Is the voltage measured 120 Vac(+/- 10 volts)? Record the reading.If YES: Refer to the Magnum Breaker maintenancemanual IB#2C12060 and check the springrelease coil Non-preferred switching device.If NO: Check the wiring to B12 and B13.Step 11: If a problem persists, contact Eaton.Note: After 10 minutes of inactivity, the display will go to a dimstate. Pressing any button will restore the display to its normalbrightness.6.4 ReplacementFollow these steps to replace the ATC-900.Step 1: Turn off control power at the main disconnect or isola-tion switch of the control power supply and lock it out toguard against other personnel accidentally turning it on.Step 2: Verify that all “foreign” power sources wired to the ATSSwitch are de-energized. These may also be present onsome of the terminal blocks.Step 3: Before disconnecting any wires from the unit, make surethey are individually identified to ensure reconnectioncan be correctly performed. Taking a picture may helpwith re-connections.Step 4: Disconnect all plugs and connectors going to the ATC-900.Step 5: Remove the 6 mounting screws holding the unit againstthe door or panel. These are accessed from the rear ofthe unit.Step 6: Set the screws aside for later use.Step 7: Mount the replacement unit.Step 8: Secure the ATC-900 to the panel with the 6 mountingscrews.Step 9: Re-connect all plugs and connectors to their propersocket on the ATC-900. Make certain that each plug issecurely seated.Step 10: Clear out all personnel, close all ATS panels, remove anylockouts, and restore control power. Ensure all setpointsare correct.6.5 Maintenance and CareThe ATC-900 is designed to be a self contained and maintenancefree unit. The printed circuit boards are calibrated and conformallycoated at the factory. They are to be serviced by factory trainedpersonnel only. The front panel including the display can becleaned lightly with a soap and water mixture.6.6 Firmware UpgradeIf a firmware upgrade is recommended, Eaton tech support willprovide you with a file download link. To upgrade the firmware,please consult the instructions provided by Eaton tech support orincluded with your firmware upgrade kit. After the USB thumb-drive is inserted, the last item on the menu will turn blue. Selectthe firmware file to update. Read the menus. It will take about 3minutes to update.* Ensure that power will not be removed during this upgrade.Note: The firmware upgrade is not the same as uploading ordownloading setpoints or downloading event information. SeeSection 7.1 for instructions on extracting setpoint and event infor-mation.For ATS assistance, call Eaton Care at:877-386-2273.CAUTIONSUPPORT THE ATC-900 FROM THE FRONT SIDE WHEN THESCREWS ARE LOOSENED OR REMOVED IN STEP 5. WITHOUT SUCHSUPPORT, THE UNIT COULD FALL AND THE PANEL COULD BE DAM-AGED.