4.5.6.3 Notes concerning use / maintenance of a parallel system
ECO-mode:
If LP-U units operate in parallel, the ECO-mode feature is not available.
No-load shutdown:
If LP-U units operate in parallel, the no-load shutdown function is not available.
Manual bypass:
If you want to switch one of the UPSs to bypass operation using the manual bypass switch (switch
is turned into position 2) then all UPSs in the parallel system have to be switched to bypass
operation in order to prevent damage.
Maintenance:
To isolate a unit from the redundant system:
1. Switch off the UPS which has to be isolated,
2. Remove the installation fuse from the input of that UPS (F1-4 in figure 17),
3. Separate the output of the UPS from the output junction (S1-4 in figure 17).
To re-enter the unit into the system:
4. Reinstall the installation input fuse,
5. Connect the output of the UPS to the output junction,
6. Switch on the UPS.
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