STXC2 User’s guide
Version 2.0
4 of 30
1.3 MMI STCU description.
The MMI STCU unit is delivered in a separate cabinet ready for DIN-rail mounting on a wall. The
display texts on the MMI STCU can be selected in Danish, English or Swedish.
The MMI STCU is equipped with an alphanumeric display, a three-coloured indication LED and
eight push buttons.
Indication LED
Menu UP
Decrease value
Increase value
Menu DOWN
Manual run
Auto run
Stop unit
Menu select / Save
The three-coloured indication LED provides information quickly about the running condition:
Green: The ventilation unit is OK.
Yellow: The ventilation unit needs inspection but runs (blocked filter).
Red: The ventilation unit is stopped due to a critical failure.
The indication LED shifts from green to yellow or red if a failure occurs on the ventilation unit. The
relevant alarm text is shown on the display (See chapter 2.7 Alarms).
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