26 ecom-ST 1.0
4.5 CO overload protection
The CO sensor is protected from overload by the system. If the limit value of
2500 ppm or 4000 ppm (depending on the model) is exceeded at the CO
sensor, the additional internal fresh air flushing pump is switched on, which
supplies fresh air to the CO sensor.
If the CO overload protection is active, the CO indicator flashes in the status
bar of the measurement screen and the status LED <Info> changes from
"green" to "red".
When the CO sensor has been sufficiently
purged with fresh air (X disappears behind CO)
and the measured values are back within the
permitted range, the fresh air purging pump is
switched off. The CO display in the status bar
of the measurement screen no longer flashes
and the status LED <Info> changes from "red"
to "green".
Damage to the CO sensor
The CO sensor can be damaged if the opening for the intake of fresh
air (AIR-IN) for the CO sensor is obstructed.
The fresh air opening (AIR-IN) must always be free.
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