Maintenance
72
NOTE!
If the "service" message appears, first turn the
analyzer off and on again. After the analyzer has
been turned on, it will automatically start to cali-
brate the sensors with fresh air. Start the diagno-
sis screen again. Only if the service message still
appears on screen, the sensor will have to be
changed.
The sensors can be replaced in the factory, in the service points or by the user himself.
The order of the sensors is as follows (from the left to the right): O
2
-Sensor, NO-Sensor,
NO
2
-Sensor (option: SO
2
-Sensor) (only Wöhler A 550), CO
high
-Sensor (only Wöhler A
550), CO Sensor.
NOTE!
If the user himself replaces the sensors, the sensor date shown in the diagnosis menu
will update automatically.
Replace the sensor as follows:
Fig. 70: Bottom of the unit - Press to
open the cover.
•
Switch off the analyzer.
•
Loosen the three bolds of the cover.
Disengage the cover hooks as follows:
•
First press with both thumbs on the rubber
coating in the middle and then on the two out-
er rubber coatings.
•
Remove the cover.
