SMart UPS SU1400I - overload constantly on, beeps ->MOSFETs?
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Posted: 2021-06-2903:06 AM. Last Modified: 2024-03-1303:16 AM
SMart UPS SU1400I - overload constantly on, beeps ->MOSFETs?
hello everybody,
I have a problem with my SU1400I USV. since today I cannot turn it on. overload lights even without anything connected and the USV beeps.
I checked the output during selftest, instead of 230V I have only 160V at the output sockets. If I cycle it on/off a few times, it comes up to 230V, but it turns off with "overload" again after a few seconds.
I cannot see any burn marks on the PCB nor are the MOSFETs exploded 🙂 does someone have a hint for me on what to check?