Ametek 420VA Manual page 13

The location should provide adequate airflow around the UPM. Provide a
minimum 3" clearance on all sides for proper ventilation.
Applying Power to the UPM
Connect the power cord to a verified grounded 3 wire receptacle. Verify
that the Site Wiring Fault "SF" is off (120 VAC models only). Once
properly connected and initially checked, turn on the UPM by pressing
and holding the front panel On/Off switch for 3 seconds.
Operational Tests
Observe the front panel of the UPM. The following table shows system
status behavior.
UPM LED DISPLAY
A01-00055 Rev G
UNIT STATUS
UPM output on
Battery charge status in 20% increments
UPM load status in 20% increments
UPM in battery operation due to improper incoming AC voltage
UPM overloaded
Battery fault or battery disconnected
Unit in buck operation do to high incoming AC voltage
Unit in boost operation due to low incoming AC voltage
Fault
UPM over temperature.
UPM Front Panel
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