Installation Manual

Webasto Air Top Installation Guide – AT2000STC

Air Top 2000STC Installation Guide 2018 | Webasto Thermo & Comfort Australia Pty Ltd.

11 Preventive Maintenance

To ensure trouble-free operation of your Webasto heater, please observe the following:

1) Operate heater for at least an hour once a month, regardless of the season

2) Keep return air inlet and hot air outlet free of obstructions to prevent overheating

3) Keep combustion air inlet and exhaust outlet tube free of dirt and obstructions

4) Change fuel filter annually (depending on the usage)

5) Bio Diesel or any fuel additive is not permitted

6) 15A fuse for both 12V and 24V heaters

Note: The build-up of Carbon is not a warrantable condition.

Situations that may cause Carbon build-up in the heater are:

• Under Voltage: the system should have at least 12.5-13V;

• Low current: the system requires 7-8A for the initial start-up phase for 120 seconds and once the flame is

established the glow plug goes out and heater continues running at 2-3A;

• Under size wire: where extensions are made to the battery positive & negative cables only, ensure that correct

wire size is used;

• Fuel system: poor fuel quality, air pockets in the fuel line or running out of fuel;

• Combustion system: any blockage or restriction in the combustion air tube or at the silencer;

• Exhaust system: any blockage or restriction in the exhaust muffler or pipe;

• Isolation switch or circuit breaker: can prevent the heater from performing a correct shut down cycle. The

battery positive & negative wire should be connected directly to the battery;

• Electrical connections: poor battery connections, poor Earth, loose fuses and improper crimping of terminals

or plugs.

The build-up of Carbon is not a product malfunction however; the above listed are external factors that could

affect the performance of the heater.

12 Fault Code

In the event of a failure a flash code will be generated on the indicator light of the Rotary Control (On/Off) switch. In

order to make a correct analysis, it is necessary to understand the fault code. The flashing code will be visible during

the cool down period of the operation.

During the flash code event you will see five quick flashes followed by a sequence of slow flashes, the sequence of

slow flashes is the actual fault code. The five quick flashes are only an indication that a fault has occurred.

Count only the slow sequence of the flashes to obtain the current fault code.

E.g. Code F03 = low or high battery voltage

Pause

F03 =

Quick flashes x5

Number of slow flashes