Modifications reserved Page 46/86
OPM_SGS_USM_M40_M50_1US_V020.doc Operating Manual SG Series 400 & 500 kVA
7.1.5 Restore to normal operation after “total off”
View of the panel after pressing the
button “total off”.
• All Contacts are open;
• Rectifier, Inverter and Static-Switch
shutdown.
• Press mute, to reset alarm and buzzer.
The Battery remains connected to the UPS in case of configuration without external
Battery Breaker Release!
1. Reset “total off” by pressing and
holding the “total off” button and then
the “inverter on” ( I ) key
simultaneously until Load is supplied
from Bypass and the Rectifier starts.
• Output connects to Bypass Utility.
• Rectifier starts with blinking LED.
• At the end of Soft-start the LED remains
lit.
• The LCD screen shows: “LOAD ON BYPASS”.
Proceed with step 2 only, when the LED
3 remains constantly lit.
2. Connect the Battery to the UPS by
closing the external Battery Breaker
Release.
3. Press “inverter on” ( I ) key.
• Soft-start of Inverter indicated with
blinking LED.
• At the end of Soft-start the LED
remains lit.
• Automatic transfer from Bypass to
Inverter.
• UPS output LED indicates Load on
Inverter.
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