OnLine Power Battery Backup System - Manual (Page 26)

OLP
Three Phase UPS Systems
1. SYSTEM OVERVIEW
1-22
HIGH DC – the LED will light as long as the DC voltage is over 430VDC.
BAT LOW – the LED will light as long as the DC voltage is lower than
320VDC.
BAT LOW STOP – the LED will light as long as the DC voltage is lower than
295VDC, inverter cannot start.
FAULT – the inverter is shutdown due to abnormal conditions such as
overload, short circuit, high DC, fuse over temperature, bypass breaker on
or emergency stop.
Since these LEDs are located behind the transparent window, the user can see
them clearly without opening the door.
D: Audible (buzzer) alarm: The user should not be expected to watch the UPS all
the time. Therefore, when abnormal conditions occur, an audible sound should
be emitted to warn the user to check the status of the UPS. The alarm buzzer will
beep under any one of the following conditions:
INVERTER IS OVERLOADED-
>110%, beep once / 3 seconds
>125%, beep once / second
>150%, beep twice / second
BACK- UP
>320VDC, beep once / 3 seconds
<320VDC, beep twice / second
<295VDC, no beeping
INVERTER IS SHORT CIRCUITED - beep continuously
FUSE BROKEN - beep continuously
HEAT SINK OVER TEMPERATURE - beep continuously
HIGH DC SHUTDOWN - beep continuously
BYPASS ON STOP - beep continuously
EMERGENCY STOP – (emergency power off) beep continuously
The buzzer will also beep once every time the inverter is switched on or off to
acknowledge to the user that his key is valid and accepted.