AEG CompuMaster 300 Operating Manual page 12

For daily use of PC' s or other device the mains switch
should remain in the on-position. It should be avoided
to switch on or off the Computer by using the mains
switch.
For longer periods without necessity of using the UPS
the mains switch should be set to the off-position. In the
case that the mains distribution will be disconnected
each evening, the CompuMaster should be switched off
too to avoid discharging of the battery, because the in-
verter will start automatically after mains break down.
To protect the battery aginst damage you never should
close the mains switch with disconnected UPS from the
mains !
The battery will not be charged when the UPS has been
switched off. Please note chapter 5.1.