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Introduction
990-4057
User Guide APC Silcon 240-320kW 400V UPS 3
1.0 Introduction
This UPS system is designed to offer reliable and problem-free power supply for several years.
The system requires only a minimum of maintenance, but we recommend you follow the
maintenance guidelines described in section 6.0 Maintenance & Testing.
1.1 Display Unit
The display unit (located on the front of the UPS) is the link between the user and the UPS and
consists of a display, an alarm LED indicator and a keyboard. The display reads parameters,
measured values and alarm messages. Alarms and the pressing of keys will activate a back
light which is set to switch off automatically after 5 minutes of inactivity.
By pressing and simultaneously you increase the back light contrast. The pressing of
and simultaneously decreases the contrast.
The LED alarm is linked to an acoustic signal indicating incorrect operation. Alarms will
change the LED light from green to red. Use keyboard to program operating parameters and
to display parameters / alarm messages.
NOTICE!
Display accuracy is ±2%, ±1digit.
LCD-display with
back light
Alarm LED
Green: OK
Red: Alarm
Keyboard