50 UPS 20-40 kVA, 230/400 V 50/60 Hz output
User’s Guide
1025358
Revision D
Following procedure does returning to normal online mode:
1. Make sure UPS modules have been started according to chapter ‘Start-up procedure’,.
2. Check that UPS ON and BYPASS LED’s are lit in the front panel.
3. Make sure service switches S1...S2/S4 in the SPM are in ‘ON’ position.
4. Turn the system bypass switch S3/S5 to ‘UPS’ position.
5. Use LCD to turn UPS unit(s) to normal mode.
Select: CONTROL
-> GO TO NORMAL MODE.
6. Verify the transfer by checking that the yellow bypass LED is turned off.
Figure 29. System bypass switch of the optional SPM
Shut-down procedure
While system is running and UPSs are supporting load, there are two different ways to perform
a shutdown. The user can select either to shutdown the whole system or only one UPS.
1. Select TURN SYSTEM OFF from the main menu Õ All the UPSs in the system will go to
stand-by mode.
2. Select TURN UPS OFF Õ Only the selected UPS will go stand-by mode.
Either 1 or 2 is selected ¿ button needs to be pressed for 5 seconds.
When UPS is in stand-by mode it still charges its batteries and uses cooling fans. Stand-
by mode possibles a fast restart. If some UPS or all the UPSs in the system need to be
shutdown completely, proseed to item 3.
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