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NOTE: Note that the Variable Module Management System mode commands are displayed only if enabled
at the factory or by an Eaton authorized Customer Service Engineer.
To transfer the critical load to the double conversion mode.
1. In the home screen, press Controls.
2. Select EAA controls.
3. Select Disable VMMS.
The UPS system transfers to the battery mode and then to the double conversion mode. The green
status indicator for normal operation is lit in all the UPSs and UPMs in the system. The UPS status is
shown as UNIT ONLINE. The UPM status is shown as ACTIVE.
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To do maintenance or service on the critical load, shut down the power to the load:
1. Turn off all the equipment that is powered by the UPS system.
2. Do the LOAD OFF procedure (see Section
7.4.10 De-energize the critical load).
The input, output, and bypass backfeed contactors open, the battery breaker or disconnect is tripped,
and the power module is turned off.
3. Open the UPS input and bypass feeder circuit breakers.
4. Repeat the steps for all the UPSs in the system.
DANGER
Power is still present inside each UPS cabinet until the upstream feeder circuit
breaker is opened, and in case of a parallel system, the output is isolated or
parallel units are shut down as well.
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Initiate a UPS system Load Off by pressing the Load Off button in the Controls→System Controls
screen. This button can be pressed to control the UPS output. The Load Off button de-energizes the
critical load and shuts down the UPS system. The UPS system (including bypass) remains off until it is
restarted.
1. Press Load Off.
The shutdown screen appears, providing a choice to proceed or abort the shutdown.
2. To shut down the UPS, press Load Off. To abort the shutdown, press Abort.
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, do the procedure in Section
7.4.1 Start the UPS system in the double
conversion mode or Section
7.4.2 Start the UPS system in the bypass mode.
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956
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February 2021 www.eaton.eu 7788
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