Factors of UPS failure phenomenon and simple treatment methods

In the process of daily processing of UPS power supply repair applications, we found that many UPS failures were caused by factors such as battery, mains power, use environment and use methods, and a considerable part of UPS itself did not fail.

In the process of daily processing of UPS power supply repair applications, we found that many UPS failures were caused by factors such as battery, mains power, use environment and use methods, and a considerable part of UPS itself did not fail.

Factors of UPS failure phenomenon and simple treatment methods

If these factors can be found out, it can be judged that the fault phenomenon is not caused by the UPS, and the problem can be solved for the customer more quickly.

Below we list these factors that affect the operation of UPS power supply in detail: battery

According to data analysis, among the UPSs that are repaired, the proportion of UPSs that cannot work normally due to battery failures accounts for about one-third. Therefore, we should pay special attention to whether the battery is faulty.

There are roughly the following types of malfunctions caused by battery problems:

1. UPS will not start.

Because the must-UPS power supply is started by DC, the UPS cannot be started when the battery is not connected, the battery is low, or there is a problem with the battery. There are several similar situations as follows:

Case 1: The newly installed UPS cannot be started.

Since the new battery will self-discharge during storage, the UPS cannot be started when the battery is in a low power state. At this time, you need to connect the UPS with the battery and the mains. Press the Test button on the front panel of the UPS. Although the UPS panel Display light will not be on, the UPS will charge the battery at this time. After charging for a period of time, press the Test button again to start the UPS.

The second situation: After the UPS inverter works for a period of time, the UPS cannot be started.

Also because the battery is low and needs to be charged.

The third situation: the battery has been used for about 2 years, and the UPS cannot be started.

According to the usage of most customers, the battery will generally have more or less capacity decline after two years of use. If the battery cannot play a role in delaying, it needs to be replaced with a new battery.

The fourth situation: the voltage of a single battery is normal, but the UPS cannot be started.

At this time, although the single-cell battery voltage is normal:

1. It is very likely that there is a problem with the connection between the battery and the battery or the connection between the battery and the UPS. For example, the connection point is not firm or the connection point is oxidized. At this time, it is necessary to remove the oxide and then reconnect.

2. It may be that the fuse of the connection between the UPS power supply and the battery is broken. If the fuse is broken, replace it with another fuse. 3. The connection between the UPS and the battery is very long, very thin, or there is a connection point in the middle, so a large voltage drop occurs, causing the UPS to fail to start.

The Links:   AA150XJ01 ASSYHLD1014-03-0010

Author: Yoyokuo