AEG IST7 - 6 Maintenance and Troubleshooting; Maintenance Guide; Safety Precautions; Preventive Maintenance

IST Series UPS (10kVA-200kVA)
User Manual 6 Maintenance and Troubleshooting
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6 Maintenance and Troubleshooting
6.1 Maintenance Guide
Proper maintenance is the key to make the device operate in the best status and with a longer
service life.
6.1.1 Safety Precautions
To ensure human safety and equipment security, observe the following precautions.
 Please keep in mind that there is dangerous voltage inside the UPS even if the UPS
does not operate. Before maintenance, use a multi-meter to check the voltage and make
sure that the UPS is completely shut down and stays in safe status.
 Before close the battery breaker at any time, use a multi-meter to measure if the voltage
of multi-meter is normal and the polarity is reverse connected. If the result is abnormal, it
is strictly forbidden to close the battery breaker.
 Do not wear any conductive metal objects during operation, such as ring, watch.
 Observe safety regulations strictly. If any doubt, consult professionals.
6.1.2 Preventive Maintenance
To improve the UPS reliability and efficacy, perform the following maintenance tasks on a
quarterly basis.
 Keep the operating environment free from dust and chemical pollutants.
 Check if the wiring terminals on input, output cables are in good contact every half year.
 Check the fans work status periodically and avoid blocking the air vents. If a fan is
damaged, maintain or replace it in time.
 Check the voltage of batteries periodically and ensure that the battery voltage is within
the normal range.
 Check the UPS status periodically and ensure that any fault can be found in time.
6.2 Battery Maintenance
 Battery charge requirements