I had that issue with a cyberpower UPS on a TS-853BU…I swapped UPS around and put and APC on the QNAP …no problems (in turn , the Cyberpower had no problem on a Windows Server host)
Nowadays I go for SNMP UPS…works without trouble
I had that issue with a cyberpower UPS on a TS-853BU…I swapped UPS around and put and APC on the QNAP …no problems (in turn , the Cyberpower had no problem on a Windows Server host)
Nowadays I go for SNMP UPS…works without trouble