Restore To Normal Operation After "Epo - Emergency Power Off" With Load Not Supplied - ABB MegaFlex UL S1 Series User Manual

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7.3.6 Restore to normal operation after "EPO - Emergency Power Off" with Load not
supplied
Warning!
Please check and ensure the conditions of the connected load are safe before proceeding, as this
procedure will result in the connection of power to the load circuit(s).
Note!
Before performing this operation, make sure that all units of the RPA Parallel System are in the
following status:
 "Q1 – External UPS Output Circuit Breaker" must be closed (Pos. I).
 "External Battery Breaker" must be open (Pos. O).
If eBoost™ option is available, make sure that eBoost™ Operation Mode is disabled before starting
this procedure.
View of the Synoptic Diagram, on all UPS units, after
performed the command "EPO - Emergency Power Off"
with load not supplied.
1. Restore the EPO (Emergency Power Off) button.
• Press "MUTE" key to reset Alarm and Acoustical Alarm.
• LED ALARM remain lit.
2. Perform the "Inverter OFF" command on all Units.
Perform the "Inverter OFF" command from the screen:
Commands 1 / Inverter / OFF.
• Rectifiers start automatically.
LEDs 1 (Rectifier) blinking, indicates Soft-start.
• After performed the "Inverter OFF" command on the last unit of the RPA Parallel System, the output of all
Units connect to Automatic Bypass.
The Synoptic Diagram, on all UPS units, must display the status "Load supplied by Automatic Bypass".
Synoptic diagram of first unit
MegaFlex 1000 to 1600 UPS User Manual / REV-A
Synoptic diagram of other units
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