UPS (Uninterruptible Power Supply) systems play a crucial role in maintaining the continuous operation of electrical devices during voltage drops or outages in the power grid. Currently, UPS systems serve as backup power sources and are widely used in various fields such as hospitals, banks, and data management, playing an irreplaceable role during power grid interruptions.
In the application of UPS power supplies, there are several common issues that users may encounter when the UPS fails to start. Let’s analyze these scenarios below.
Scenario 1: Newly Installed UPS Fails to Start
If a newly installed UPS fails to start, this could be due to two main reasons. Users should first check if the battery connection plug on the rear panel of the UPS is properly connected. If not, they can open the front panel to inspect the battery connections.
Scenario 2: UPS Battery, Used for Around 2 Years, Fails to Start
For many users, when the UPS battery has been in use for approximately two years, there may be a decrease in battery capacity or issues related to battery inertia. If the battery fails to provide the necessary backup power, users should consider replacing the battery to prevent these issues. Utilizing battery automation management software can help prevent battery inertia problems.
Scenario 3: Normal Voltage Across Individual Battery Cells, Yet UPS Fails to Start
Even when the voltage across individual battery cells is normal, there are other potential reasons why the UPS may fail to start.
- It could be due to poor connections between batteries or between the batteries and the UPS, such as loose or oxidized connection points. In such cases, it is necessary to remove any oxidation and reconnect the components.
- The fuse connecting the UPS to the batteries may have blown. If this is the case, replacing the fuse should resolve the issue.
- Long, thin, or poorly connected wires between the UPS and the batteries may cause significant voltage drops, preventing the UPS from starting.