results. This increased CO
2
content can be corrected to the nominal value with a late CO
2
adjustment. No
setting/correction is necessary for heaters with automatic altitude compensation!
6.3.2 Adjusting CO
2
content
The CO
2
content in the emissions is set using the temperature selector on the control element. In the process, activate
any heating mode (Eco, Normal or Plus) with the Air Top Evo Multi Control (MC04) control element.
IMPORTANT:
The heater must be switched off.
1. Connect the CO
2
line to minus.
2. Turn the adjustment knob on the control element to the center position. The heater will start and go
automatically to partial load mode.
NOTE:
If the heater can be adjusted, the operating indicator will flash as if the control unit has suffered an error.
Diesel units:
3. Adjust the CO
2
value by turning the adjustment knob. Turning it counter-clockwise will reduce the CO
2
value, while
turning it clockwise will increase it. The CO
2
content must be set in accordance with the table below at partial load,
depending on the altitude.
Petrol units:
3. The CO
2
content may only be set with the unit at operating temperature. The unit must be operated for at least 8
minutes for this purpose. Then the CO
2
content must be set in accordance with the table below at partial load,
depending on the altitude.
Diesel and petrol units:
4. If the CO
2
value is in the permissible range, disconnect the CO
2
line from minus. This saves the setting.
NOTE:
The heater will now run in the normal mode again and can be switched off in the accustomed manner using
the control element.
Air Top Evo 40 /
55 Petrol 12 V
Air Top Evo 40 /
55 Diesel
12V/24V
0 m above sea level
5,6
6,3
500 m above sea level
6,0
6,7
1,000 m above sea level
6,3
7,1
1,500 m above sea level
6,7
7,6
Nominal values for CO2 content in exhaust gas [vol. %]
6.4 Tests of Individual Components
IMPORTANT:
For function tests, always disconnect the connection between the control unit and the component to be
tested.
NOTE:
If a fault occurs which cannot be detected with this procedure, the unit/component must be sent in to the
Webasto Warranty Department.
NOTE:
Damage caused by soiling will not be recognized by Webasto!
26
Air Top Evo 40 / Air Top Evo 55 Service Manual
Summary of Contents for Air Top Evo 40
Page 63: ...4 2015...
