STXC2 User’s guide
Version 2.0
17 of 30
2.7 Alarms.
If the ventilation unit does not work properly, an alarm is shown on the display and the indication
LED shifts colour from green to yellow or red.
The indication LED lights yellow as a warning. A non-critical failure has appeared. The ventilation
unit does not stop, but only needs inspection:
- ”Filter exhaust”
- ”Filter supply”
The indication LED shifts to red. A critical failure has appeared. The ventilation unit is stopped (not
Heat wheel):
- ”Fail preheat”
- ”Fail reheat”
- ”Fire supply”
- ”Fire exhaust”
- ”Fan supply”
- ”Fan exhaust”
- ”Flow supply”
- ”Flow exhaust”
- ”Supply sensor”
- ”Return sensor”
- ”Ambient sensor”
- ”Preheat sensor”
- ”Heat wheel”
A critical failure must be manually reset so that the ventilation unit can be re-started.
If the connection to the STXC2 control circuit board is not present, the following communication
failure appears on the display:
- ”No STXC Detected”
Actual room temp C +20,7
Supply m3h 02500
Monday 12:21
Actual prog no 01
Alarm
Fail preheat
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