MGE UPS Systems 800 Rack User Manual

Page 18 - 

34007117EN/AB

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10

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12

Press the ON / OFF button  10 .
The buzzer beeps and all the LEDs come ON.
The buzzer beeps twice during the self-test, then button  10  remains
ON, indicating that the outlets are supplied with power.
- AC power is present: Only button  10  is ON. The protected
equipment is supplied by the AC-power source.
- AC power is absent: Button  10  and LED  11  are ON. The protected
equipment is supplied by the UPS, operating on battery power.

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3.2 Shift to booster or fader mode
(during voltage variations in the AC-input power)

16

The booster and fader functions maintain the output voltage supplied by
the UPS within close tolerances around the rated value even if
significant voltage variations occur in the AC-input power. This avoids
calling on battery power.
The values defining the voltage range may be set using the UPS Driver
software.
During operation in booster or fader mode, LED  16  is ON, signalling a
significant voltage variation in the AC-input power.

If button  10  or LED  11  are not ON or if LED  12  is ON, there is a fault (see section 4.1).
Note: The battery is charged as soon as the UPS is connected to the AC-power source, even if button  10  is in the OFF
position.