UPS: MKD 700 – 3000 VA RT (XL) Operation and Service
A switch to the autonomous mode is often intentionally applied to determine the
autonomous period (support time) of the UPS device.
6.1.4 Direct switching on/off in the autonomous mode (COLD START)
Also when there is not a mains power supply, the UPS device can be directly
switched on in the autonomous mode. Follow the instructions below for this:
To begin, the device must be fully switched off without a mains power
supply connection.
The EPO (REPO connection) must be closed.
Briefly press the On/Off button (1)
. The UPS will start up
immediately in the standby mode after a brief test (self-test);
The display here appears provided the UPS
device is in standby mode. The UPS is fed by
the battery bank.
Now start the UPS up by pressing the On/Off button (1)
for longer
than 1 s. The signaler confirms the selection with a 1 s beep, and the
UPS starts in the autonomous mode after a brief test (self-test). The
loads are now being supplied;
The LC DISPLAY shows the autonomous
mode as well as the current battery bank and
output data. The signaler sounds briefly every
4 s.
Stopping and shutting down the UPS occurs here by pressing the
On/Off button (1)
for longer than 3 s. The signaler confirms the
selection with a 3 s beep, and the UPS shuts down after a brief test.
The display goes out.
A COLD START, also called a BLACK START, is frequently applied to perform
a few load or stress tests in advance.
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