Vertiv Liebert EXM - 6.15 Reset After Shutdown for Emergency Stop or Other Conditions; 6.16 Battery Protection

Vertiv™ | Liebert® EXM
™
50-250kVA, 480V, 60Hz User Manual | 71
6.15 Reset After Shutdown for Emergency Stop or Other Conditions
Once all appropriate measures have been taken to correct the problem indicated by the alarm
message appearing on the Operator Control Panel, carry out this procedure to restore the UPS to
regular operation following an EPO action or for the following reasons: Inverter Overtemperature,
Cut-Off Overload, Battery Overvoltage, excessive switching (BYP: XFER COUNT BLOCK), etc.
When the user confirms that the fault is cleared:
1. Log in as Operator, Administrator or Service.
2. Touch the OPERATE tab.
3. Touch the yellow Reset button to clear the emergency power Off state.
4. Press the Inverter On radio button on the right side of the Operator Control Panel for longer than
2 seconds (after the rectifier has qualified).
After the EPO button is pressed, if the input utility is removed, the UPS will shut down completely.
When input utility is restored, the EPO condition will clear, and the UPS will enable the static
bypass and restore the output.
6.16 Battery Protection
6.16.1 Battery Undervoltage Warning
Before the end of discharge, the Liebert
®
EXM
™
displays a low battery warning. After this warning,
the battery has the capacity for 5 minutes discharging with full load (default time). The Liebert
®
EXM
™
can be user-configured to display this warning from 3 to 60 minutes before end-of-
discharge.
6.16.2 Battery End-of-Discharge (EOD) Protection
If the battery voltage is lower than the end-of-discharge voltage, the battery converter will be
shut down. Refer to Table 22 for battery circuit details.
6.17 Operation
NOTE
The rectifier will start automatically 5 minutes after the of overtemperature fault is cleared.
WARNING
Risk of electrical shock and arc flash. Can cause property damage, injury and death.
The Liebert
®
EXM
™
contains high voltages internally. Components that can only be
accessed by opening the protective cover with tools cannot be serviced or replaced by the
user.
Only properly trained and qualified service personnel are authorized to remove the
protective covers.