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7.1.6 Restore to normal operation after EPO (Emergency Power Off)
NOTE !
Make sure the UPS to be status of the activation of EPO, i. e. UPS Output Switch Q1
closed (Pos. I), External Maintenance Bypass Switch (option) open (Pos. O) and the
Battery Circuit Breaker connected (Pos. I).
If eBoost™ option is available, make sure that eBoost™ Operation mode is disabled
before starting this procedure.
View of the Synoptic Diagram after activation of EPO
(Emergency Power Off) with Utility available.
• All Contactors are open.
• Rectifier, Inverter and Static-Switch shutdown.
• LED Alarm is lit.
1. Reset the EPO (Emergency Power Off) key.
Press the "MUTE" key to reset alarm and acoustical alarm.
LED Alarm remains lit.
2. Press the "Inverter OFF" ( O ) key.
Load is transferred to Utility by Automatic Bypass.
Rectifier starts automatically, blinking LED 3 (Rectifier ON) indicates Soft-start.
At the end of Rectifier Soft-start the LED 3 (Rectifier ON) remains lit.
The Synoptic Diagram must display the status "LOAD
SUPPLIED BY AUTOMATIC BYPASS".
3. Insert the Inverter by pressing the "Inverter ON" ( I ) key.
Soft-start of Inverter indicated with blinking LED 5 (Inverter available).
At the end of Soft-start the LED 5 (Inverter available) remains lit.
The Load will be automatically transferred from Automatic Bypass to Inverter.
LED Alarm turn Off and the LED Operation must be lit.
The Synoptic Diagram must display the status "LOAD
SUPPLIED BY INVERTER".
Modifications reserved
OPM_SGS_USM_M75_M75_2US_V010.doc
END OF PROCEDURE
User Manual SG Series 750 UL S2 & SG Series 750 T12 UL S2
Page 53/71
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