5 Remove dangerous voltage
CAUTION
To avoid damage due to ESD (ElectroStatic Discharge) be sure that maintenance work is
performed under ESD-safe conditions: work on an anti-static mat; ground yourself and the unit
when it is opened.
CAUTION
When the UPS is uncovered use the proper caution to not damage the board and all the
electrical parts.
• 1 Wait 10 Minutes to allow discharge of the DC-Capacitors.
Put a multimeter on the 2 indicated points to check if the capacitor is discharged.
(remaining voltage has to be less than <20V)
Use a 100 Ohm / 10 Watt resistor to discharge the capacitor on the correct indicated points how
shown in the picture.
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