American Power Conversion 480kW400V - Manual (Page 18)

18 User Guide APC Silcon 480kW 400V UPS
990-4058
Operation
3.0 Operation
The display unit will read parameters, alarms/messages and measured values. LED alarm
incorporates audible alarm, indicating unusual operating situations. The keyboard is used to
program and control parameters and to display alarm messages and measured values.
3.1 Keyboard
NOTICE!
By pressing and simultaneously you increase back light contrast. The pressing of
and simultaneously decreases the contrast.
Displays
battery voltage
Displays
input voltage
Displays
battery current
Displays
input current
Displays time
Exits a mode
Accesses
alarm stack Chooses
parameters
Displays
outputy voltage
Schrolls up
through list
Schrolls down
through list
Displays
output current
Stores parameters/
enter parameter
stack
Displays
output frequency
Silences the
audible alarm