Control Rheostat
Set the rotary knob on the control rheostat to the desired position.
NOTE:
To prevent the hot and combustion air fan from blocking or scraping, ensure that there are no objects on or against the
heater before you switch it on.
A separate switch (not included in kit) allows the user to choose between heating and ventilation mode. In ventilation mode the
fan speed depends on the position of the control rheostat.
If an error occurs, first check the fuse and plug connections to ensure that they are in good condition and connected properly.
If the actions described below do not rectify the error, have the heater checked by Webasto-trained personnel.
Cause Remedy
No combustion after start and repeat start
Switch heater unit off (for at least 2 seconds) and then on again
Flame extinguishes during operation
Switch heater unit off (for at least 2 seconds) and then on again
Heater unit overheats and indicator flashes
Make sure that hot air can flow freely, allow heater unit to cool down,
Switch heater unit off (for at least 2 seconds) and then on again
Vehicle voltage too low Charge
battery
Switch heater unit off (for at least 2 seconds) and then on again
Cause Remedy
Combustion air and/or exhaust system blocked Check combustion air and exhaust system for blockage
Rotary knob for:
- Switching on and off
- Setting the room temperature
- Resetting after a fault cut-out
Indicator/error code display
Changes to the settings on the
control rheostat will be carried out
with a time delay.
Switch On
Ventilation Option (Optional)
Actions in event of faults
Heater unit cuts out automatically
Heater unit emits black smoke
Operating Instructions
Air Top 2000 ST
(Control Rheostat Only)
