Improper voltage be it higher or lower than required by the PSU will very likely damage it, of course, these PSU always have some sort of protection and they shut down when they signal wrong voltage, but those don't always work and when they don't, boom the PSU is toasted.
It is safe to assume that OP was very lucky that the PSU was still good after being plugged in 120 volts, nobody should attempt that because there is no guarantee you will be as lucky, so that's a lesson learned for all of us.
The second lesson is whenever you get this in your kernel log
driver-btm-api.c: 197: set_miner_status: STATUS_INIT
driver-btm-api.c: 197: set_miner_status: STATUS_OKAY
And the miner's overview shows this
Socket connect failed: Connection refused.
It almost always indicates something wrong with the pool settings.
Thanks for updating this case, maybe lock the topic since the problem is solved.
