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7 MAINTENANCE AND TROUBLESHOOTING
This section mainly introduces the UPS maintenance guide, battery daily maintenance, battery replacement
announcement, troubleshooting, etc.
7.1 Maintenance guide
Proper maintenance is the key for a longer service life.
7.1.1 Safety precautions
To ensure safety and equipment security, observe the following precautions:
• Please keep in mind that there is dangerous voltage inside the UPS even when the UPS is not operating.
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 closing the battery breaker at any time, use a multi-meter to measure if the voltage of
multi-meter is normal and the polarity is reversely 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 in doubt, consult professionals.
7.1.2 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 six months.
• Check the status of the fans periodically and avoid blockage to air vents. If a fan is damaged, maintain or
replace it on 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 on time.
7.2 Battery maintenance
• Battery charge requirements
− When using the battery for the first time, please start the UPS and charge the battery for 24 hours. During
charging, the UPS can still be used, but if power outage occurs at the same time, the battery discharge
time may be less than the standard value this time.
Step 1 Close the load of parallel system, keep the UPS run without load for 5 mins. to eliminate inner heat.
Step 2 Perform 6.3.3 UPS Shut down to close all UPS, system turns to bypass power supply.
Step 3 Disconnect the load total breaker, each UPS output breaker (OUTPUT), battery breaker (BYPASS),
mains input breaker (POWER) successively.
• Single UPS running
Press the EPO button of the UPS or the EPO button of total system, the UPS will shut down and close all
output. Multi UPS running in parallel system
• EPO linkage is enabled Press the EPO button of the UPS or the EPO button of total system, all the paralleled
UPS will shut down and close all output.
• EPO linkage is not enabled Press EPO button of one UPS, the output of this UPS will be closed. Press the EPO
button of total system, all paralleled UPS will be shut down and all output will be closed.
Note:
Perform only Step 2 to close the UPS. To power off the entire UPS system, perform all the steps.
6.4.3 Emergency Power Off (EPO)