Eaton 9155 User Manual page 78

UPS MAINTENANCE
72
Eaton 9155 UPS (8–15 kVA) User's Guide
You must press the red button beside the switch before turning the maintenance
bypass switch.
Figure 48. Wall-Mounted Maintenance Bypass Switch
To transfer the load from the UPS to maintenance bypass (wall-mounted operation):
1. Press the red button beside the maintenance bypass switch.
2. Turn the maintenance bypass switch to the SERVICE position.
The UPS battery circuit breaker trips, and the UPS is now bypassed, with the
load powered by utility power.
3. The UPS automatically shuts down.
To transfer the load from maintenance bypass to the UPS (wall-mounted operation):
1. Press the red button beside the maintenance bypass switch.
2. Turn the maintenance bypass switch to the LINE position.
The UPS starts up in Bypass mode, with the load still powered by utility power.
3. Switch the UPS battery circuit breaker to the ON position.
NOTE Wait until the
indicator illuminates before proceeding to Step 3; otherwise, power to the load
may be lost.
4. Turn the maintenance bypass switch to the UPS position to return to Normal
mode. The UPS is now powering the load.
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164201553 Rev G (www.eaton.com/powerquality)