How to deal with the power failure of Schneider apcups?

Schneider's apcups can't be started normally. The apcups power engineer will explain to you how to deal with it if it can't be started?

1. It may be that the power switch is in off state. Please confirm whether the equipment switch is in on state. If not, please press the switch for at least 3 seconds.

2. Possible fuse open circuit, confirm whether the load meets the rated capacity / replace the fuse of the same specification

3. It may be AC power failure, and confirm whether the contact between input power and socket is good.

4. The battery may be damaged and needs to be replaced.

5. If it is not the above problem, then it is ups fault, which needs to be reported for repair.