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zwrightSep 5, 2025
What does Warning 3F mean on Powerbank KNIGHT ONLINE?
- NnorrismistySep 5, 2025
Warning 3F on your Powerbank UPS indicates that the parallel communication cable is loose or there is incorrect parallel operation. If you are using a parallel system, ensure the parallel communication cable is tightly connected and check if the 'parallel information' in the LCD is okay. If it is, you can turn on the UPS after removing the warning message by pressing the 'UP' and 'DOWN' buttons together. If not, contact your dealer. If you are using a single UPS without a communication cable or parallel output cable, you can ignore this warning and remove it by pressing the 'UP' and 'DOWN' buttons, then turn on the UPS.