USV ME400/500/600/650/800
Instruction Manual
ME series
Page 21 of 32
A.V.R. mode:
Within certain limits, A.V.R. mode compensates for over- or under-voltage in
the power supply without drawing current from the batteries. This reduces the
transfer voltage range at the UPS output compared to the mains power supply.
Display/alarm signal: A.V.R. mode has no special display. The display is the
same as on-line mode. No audible alarm signal.
Support mode (battery mode):
If the mains power fails, the UPS immediately switches to support mode. If the
voltage falls below the cut-off voltage of the battery pack, the load is
automatically switched off and switched to sleep mode.
Display/alarm signal: In support mode the LINE LED flashes. The audible alarm
signal sounds with sequence (
A
).
Overload mode:
If the UPS output is overloaded, the UPS switches off after a short time interval
(approx. 5 seconds). The UPS switches off immediately in the event of a short
circuit on the output side.
Display/alarm signal: In overload mode the LINE LED lights up. The audible
alarm signal sounds with sequence (
C
).
Sleep mode:
The UPS switches to sleep mode when it is switched off via the communication
interface or if the voltage falls below the cut-off voltage of the battery pack in
support mode. In this event the UPS only monitors the input supply for
resumption of power supply.
Display/alarm signal: No display. No audible alarm signal.
Fault mode:
If a fault develops in the equipment, the UPS immediately switches to fault
mode. This switches off the load at the output. This operating mode can then
only be reset by powering down the UPS completely.
Display/alarm signal: In fault mode the LINE LED lights up. The audible alarm
signal sounds with sequence (
C
).
