Black Box COMPACT T1 MT850A - Manual (Page 438)

11-6 Compact T1 - Release 6.1
Power Supply
115 VAC LEDs
115 VAC LEDs
The power supply card has two LEDs, as described in the table below.
LED State Description
AC
Input Off AC input missing or failure
Green AC input present
Battery Off Battery input not used
Green Battery charging or operating from
DC source only.
Yellow Battery discharging
Red Battery low (less than 42V),
ringer disabled