Homage UPS Fault 0

Please if any one know what is the cause of Fault 0 in homage UPS and how to repair It , Help me

please send information regarding Homage UPS Fault 0 to my email address mzubair84@yahoo.com

Thanks

Here is a solution of fault 0
https://www.electronicabc.com/tutorials/how-to-repair-fix-inverter-ups-fault-0/