Webasto Air Top 2000 S B, Service And Repair Manual

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List of Contents
1. Introduction
1.1 Scope and Purpose.................................................................................................................................101
1.1.1 Use of Air Heaters.......................................................................................................................101
1.2 Meaning of Warnings, Cautions, and Notes............................................................................................101
1.3 Additional Documentation to be used......................................................................................................101
1.4 Safety Information and Regulations ........................................................................................................101
1.4.1 General Safety Notes..................................................................................................................101
1.5 Legal Provisions for Installation...............................................................................................................102
2. General Description
2.1 Combustion and Heating Air Fan ............................................................................................................201
2.2 Heat Exchanger.......................................................................................................................................202
2.3 Burner Insert with Combustion Tube.......................................................................................................202
2.4 Control Unit / Control Circuit Board .........................................................................................................202
2.5 Flame Sensor ..........................................................................................................................................203
2.6 Glow Plug ................................................................................................................................................203
2.7 Temperature Limiter ................................................................................................................................203
2.8 Dosing Pump...........................................................................................................................................203
3. Functional Description
3.1 Functional Description Air Top 2000 S .......................................................................................................301
3.1.1 Control Element ..........................................................................................................................301
3.1.2 Switch-On....................................................................................................................................301
3.1.3 Stabilization.................................................................................................................................301
3.1.4 Heating Operation.......................................................................................................................302
3.1.5 Control Operation........................................................................................................................302
3.1.6 Control Idle..................................................................................................................................302
3.1.7 Switch-Off....................................................................................................................................302
3.1.8 Switch-Off upon Failure...............................................................................................................302
4. Technical Data ...............................................................................................................................................401
Air Top 2000 S
List of Contents
5. Troubleshooting
5.1 General....................................................................................................................................................501
5.2 General Failure Symptoms......................................................................................................................501
5.3 Failure Symptoms during Operation........................................................................................................502
5.4 Error Code Output ......................................................................................................................................503
6. Functional Tests
6.1 General....................................................................................................................................................601
6.2 Adjustments.............................................................................................................................................601
6.2.1 Adjustment of the CO
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Contents.................................................................................................601
6.3 Components Testing ...............................................................................................................................602
6.3.1 Glow Plug Resistance Test .........................................................................................................602
6.3.2 Flame Sensor Resistance Test ...................................................................................................602