Why is my PowerShield UPS beeping and showing a warning code?
- CChristine GriffithJul 28, 2025
If you see the icon and a warning code flashing on the LCD display of your PowerShield UPS and hear an alarm sounding every second, it could be due to several reasons. One potential cause is that the EPO (Emergency Power Off) function is activated. To disable it, set the circuit in a closed position. Another reason could be that the line and neutral conductors of the UPS input are reversed; in this case, rotate the mains power socket by 180° and then connect it to the UPS system. Finally, the external or internal battery may be incorrectly connected, so check that all batteries are well connected.