Webasto Thermo 90, Workshop Manual

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Thermo 90 List of Contents
I
List of Contents
1 Introduction
1.1 Scope and Purpose ............................................................................................................................... 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
1.6 Corrections and Improvements.............................................................................................................. 103
2 General Description
2.1 Combustion Air Fan ............................................................................................................................... 202
2.2 Heat Exchanger ..................................................................................................................................... 202
2.3 Temperature Sensor.............................................................................................................................. 203
2.4 Temperature Limiter .............................................................................................................................. 203
2.5 Burner Insert .......................................................................................................................................... 203
2.6 Glow Plug .............................................................................................................................................. 203
2.7 Flame Sensor ........................................................................................................................................ 203
2.8 Combustion Tube .................................................................................................................................. 203
2.9 Circulation Pump ................................................................................................................................... 203
2.10 Control Unit............................................................................................................................................ 203
2.11 Dosing Pump ......................................................................................................................................... 203
3 Troubleshooting
3.1 Switch-on ............................................................................................................................................... 301
3.2 Heating Operation.................................................................................................................................. 301
3.3 Control Operation .................................................................................................................................. 301
3.4 Switch-off ............................................................................................................................................... 301
3.5 Functions of the Heater in TRS Vehicles............................................................................................... 301
3.6 Malfunctions........................................................................................................................................... 303
3.6.1 Switch-off upon Failure................................................................................................................ 303
3.6.2 Diagnosis after Switch-off upon Failure (Thermo 90) .................................................................. 303
3.6.3 Diagnosis after Switch-off upon Failure (Thermo 90 S)............................................................... 303
4 Technical Data ................................................................................................................................................ 401
5 Troubleshooting
5.1 General .................................................................................................................................................. 501
5.2 General Failure Symptoms .................................................................................................................... 501
5.3 Failure Symptoms after Switch-off upon Failure.................................................................................... 502
5.4 Visual Inspection for Assessment of Burner Condition.......................................................................... 503
5.4.1 Burner Housing............................................................................................................................ 503
5.4.2 Rear Wall with Metal Evaporator ................................................................................................. 504
5.4.3 Combustion Chamber.................................................................................................................. 504
5.4.4 Burner Assembly ......................................................................................................................... 504