Modifications reserved Page 49/79
OPM_SGS_USM_M22_M30_2US_V010.doc User Manual SG Series 225 & 300 UL S2
7.1.2 UPS shutdown with Load transfer on Manual Bypass Q2 (option)
NOTE !
Not following this procedure can cause protected loads to shut down!
Never close or open either UPS Output Switch Q1 and Manual Bypass switch Q2
(option) with the inverter running!
Initial situation: the Load is powered by the Inverter.
If eBoost™ option is available, make sure that eBoost™ Operation Mode is
disabled before starting this procedure.
The complete UPS system has to be turned OFF, while providing the Load power
by Utility through the Manual Bypass Q2 (option).
With the UPS in normal operation and the inverter supplying the Load, the UPS Output Switch Q1 is
closed (Pos. I) and the Manual Bypass Switch Q2 (option) is open (Pos. O).
The External Battery Switch or Fuses are closed (Pos. I).
The Synoptic Diagram must display the status “LOAD
SUPPLIED BY INVERTER”.
1. Disconnect the Inverter by pressing the “Inverter OFF” ( O ) key and hold until the LED 5
(Inverter available) turns OFF.
•
Load is transferred to Utility by Automatic Bypass.
• Inverter shuts down. LED 5 (Inverter available) must be OFF.
• LED Alarm is lit and the LED Operation is Off.
The Synoptic Diagram must display the status “LOAD
SUPPLIED BY AUTOMATIC BYPASS”.
2. Close the Manual Bypass Switch Q2 (Pos. I).
•
Load is now supplied parallel through Automatic Bypass and Manual Bypass Q2.
• LED 8 (Automatic Bypass ON) and LED 9 (Manual Bypass Q2 ON) are lit.
The Synoptic Diagram must display the status “LOAD
SUPPLIED BY AUTOMATIC BYPASS AND MANUAL BYPASS
Q2”.
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