Modifications reserved Page 70/79
OPM_SGS_USM_M40_M50_2US_V010.doc User Manual SG Series 400 & 500 UL S2
3. Disconnect on all Units the Battery from the UPS by opening (Pos. O) the External Battery
Switch or Fuses.
• Wait 5 minutes for DC-Link Capacitors discharge.
4. Disconnect the Utility supply on all Units.
• Complete power shutdown will OFF the LCD Display Panel.
Synoptic Diagram of first unit Synoptic Diagram of other units
END OF PROCEDURE
DANGER !
It will take 5 minutes for the DC capacitors to discharge.
Open only the front door, do not open any other part of the UPS.
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