Njoy UPCMTOP960HASCG02B User Manual page 18

Converter mode
Standby mode
Warning mode
Fault mode
18
When input frequency
is within 40Hz to 70Hz,
the UPS can be set at
a constant output fre-
quency, 50Hz or 60Hz.
Utility will charge the
battery and no output
voltage until switch on
the UPS.
The UPS is warning be-
cause of overload.
The UPS goes to fault
mode because output
is short.