UPS MKD2000/3000 XL
Manual
MKD XL Series
Page 26 of 45
9 Operating and controlling the equipment
9.1 Operating of the UPS
There are different operating modes and operating messages of this UPS.
9.1.1 Operating modes and signals
The most important modes of the UPS can be described as follows:
Charging
mode:
If the mains power is available and the input fuse is switched on, the UPS is
in charging mode.
-> The batteries are already charged, but the UPS has not yet been switched-
on.
Depending on the basic setting there is no output voltage or the UPS is in
bypass mode and there is output voltage.
Display/alarm signals:
The green LED (NORMAL) is flashing and the acoustic alert sounds in the
following sequence (
E
)
(beep -> long pause (2 min.) -> beep -> .., repeating).
Without output
voltage:
With output voltage:
Start-up
mode:
If the mains power is available, the start-up procedure is initiated when the two
ON-buttons are pushed. Then the UPS switches for about 10 sec over to the
bypassing mode. Afterwards the on-line mode is automatically activated.
If no mains power is available during the start-up procedure, the UPS switches
directly to bypass mode directly after the start-up procedure.
Display/alarm signal:
The yellow LED (WARNING) lights up during bypass mode, the acoustic alert
resounds 2 times shortly.
Bypass mode:
