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Posted: 2021-06-2808:02 AM. Last Modified: 2024-03-1812:12 AM
APC Sua3000rmi2u cannot cold start
I have UPS APC SUA3000RMI2U run normal by line and switch 2 modes still normal. But When I turn off ups and turn on by battery (don't plug in power) UPS sound beep and can not start up. But When I plug in power ups run normal and switch 2 modes normal. I have replaced new battery by 48VDC but cannot start.
I think mainborad have broken? Pls tell me how can i solved?