Note: All power to the critical load is lost when Load Off is selected. Only
use this feature when you want to de-energize the critical load.
When Load Off is selected, the input, output, and bypass backfeed contactors
open, the battery breaker or disconnect is tripped, and all the UPSs in the
system are turned off.
To restart the UPS system, follow the procedure in Section
7.3.1
or Section
7.3.2
.
CAUTION
Do not attempt to restart the system after Load Off until you have identified
and cleared the cause of the shutdown.
7.4 UPS control instructions
7.4.1 Starting a single UPS
Make sure that the load level does not exceed the single UPS capacity.
To start the UPS:
1. Open the UPS front door.
2. If included inside the UPS system, check that the rectifier input switches
are closed.
3. Check that the battery breaker is closed.
4. Close the UPS front door.
5. Close the UPS input feeder circuit breaker.
6. Close the UPS bypass input feeder circuit breaker.
7. Wait for the UPS control panel display to become active and indicate logic
power.
8. In the home screen, press Controls.
9. Press the UPS controls button.
In the UPS controls screen, the system status is shown as SHUTDOWN.
10. In the UPS controls screen, press the Go online button.
If Auto Bypass is enabled (factory default), the critical load is immediately
supplied by the bypass source in the bypass mode, until the inverter turns
on and the UPS transfers to the double conversion mode. The yellow
status indicator on the UPS control panel indicates that the UPS is in the
bypass mode. If auto bypass is not enabled, the UPS output remains off
until the UPS system transfers to the double conversion mode.
11. In the UPS control screen, press the Go online button.
12. Wait for the following messages to appear sequentially on the UPS status
line:
Eaton 93PM UPS 30–200 kVA
User's and installation guide
©
Eaton Corporation plc 2017. All rights reserved. Revision: 005 Document ID: P-164000249 100 (126)
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