Eaton APS6-600 Series Installation And Operation Manual

Also see for APS3 Series: Installation and operation guide

MaintenanceCopyright © 2018 Eaton Corporation. All Rights Reserved.IPN 997-00012-10A2 July 2018 65Battery Mid-point Monitoring (String Fail) AlarmUse the following procedure if a String Fail alarm is generated.Step 1 - Identify the faulty battery string1 Press any button on the SC300 to silence the alarm.2 Connect to the SC300 using DCTools/Web. Go to Batteries > Mid-point Monitoring.3 Click + to expand the Mid-point Monitoring table to identify which battery stringhas failed.Step 2 - Check cell/monobloc voltages1 Use a suitable voltmeter to measure the individual cell/monobloc voltages.Measure on the cable lugs and inter-connecting bars so that loose connections willalso be detected.2 The faulty or poorly connected cell/monobloc has the voltage with the greatestdeviation from the average.Step 3 - Check cell/monobloc terminals1 Check the terminal connections of the cell/monobloc are correctly tightened andclean. Refer to the battery manufacturer's instructions for correct terminal torque settings.2 In DCTools/Web go to Batteries > Mid-point Monitoring. Click Clear String Fail.3 If the alarm clears then the fault is fixed. No further action is required.Step 4 - Service or replace faulty cell/monobloc (if required)1 If the alarm is still present then follow the battery manufacturer’s instructions onservicing or replacing the faulty cell/monobloc.2 After the faulty cell/monobloc has been serviced or replaced clear the alarm (seeStep 3).Procedure completeBattery Disposal and RecyclingFollow Environmental Protection Agency (EPA) guidelines or the equivalent local regulations todispose of all batteries. Please remember that the owner is responsible and liable to ensure thoseEPA guidelines or equivalent local regulations are followed.For assistance contact your local hazardous waste facility or Worldwide Support on page 103.