Vertiv Liebert AC8 - Connecting the Battery Pack; Turning on the Liebert AC8

Troubleshooting - Transformer Module
A common problem and possible solution are shown in the table below. For further information or if you
have other problems with the unit, consult your local dealer, Liebert representative or the Liebert
Worldwide Support Group.
Problem Possible Solution Replacement Fuse Part Numbers
24VAC power
not available
from TB1 or TB2
Check fuse for respective
output (TB1 or TB2).
LITTLEFUSE 218002
or
BUSSMANN GDC-2A
2.4.2 Connecting the Battery Pack
Before connecting input power to the Liebert AC8, connect the panel’s backup battery (factory-supplied)
to the jumpers so it will begin charging when electrical power to the Liebert AC8 is switched on.
NOTE: If the battery is not hooked up BEFORE the Liebert AC8 is switched on, it will trigger an alarm.
To connect the battery pack, insert the battery leads into the jumpers as shown at right.
(To disconnect the battery pack, remove the battery leads from the jumpers.)
2.4.3 Turning On the Liebert AC8
After connecting the backup battery, turn on the power On/Off switches to the Liebert AC8 and the
Transformer Module (see Controller Board Overview on page4 for location of switches).
Vertiv | Liebert® AC8 User Manual | 16