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User’s Guide P-164000628 P-164000628—Rev 05 15
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It is critical that the following steps are followed to ensure correct and safe operation.
Do not attempt to push the red interlock button or attempt to move the bypass switch handle if the UPS is
operating on battery power.
Refer to the UPS user guide or call the Eaton service help desk for specific BPM to UPS signal functionality.
To turn the BPM to SERVICE:
1. Press and hold the red button and turn the switch to LINE (see Figure 15).
NOTE Pressing the red button sends the UPS into Internal Bypass mode. This allows the UPS
output to synchronize with utility for safe, uninterrupted transfer.
The UPS is now in LINE mode. The critical load is fed directly from utility and the UPS remains energized
from utility power. The UPS may be left in this mode while trying to troubleshoot, gather alarms from the
UPS, or perform other preventative maintenance activities.
Figure 15. From UPS to LINE
2. Turn the switch from LINE to SERVICE (see Figure 16). The critical load is fed directly from utility and the
UPS is now completely disconnected from AC power. Ensure that the UPS is off and the terminals are
completely de-energized before performing any maintenance on the UPS.
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