Webasto Thermo 90, Workshop Manual

List of Contents

Thermo 90

II

6

Functional Tests

6.1

General .................................................................................................................................................  601

6.2

Adjustments ..........................................................................................................................................  601

6.2.1 Adjustment of the CO

2

 Contents ................................................................................................  601

6.3

Components Testing.............................................................................................................................  601

6.3.1 Temperature Sensor Resistance Check.....................................................................................  601
6.3.2 Glow Plug Resistance Test.........................................................................................................  601
6.3.3 Flame Sensor Resistance Test...................................................................................................  601
6.3.4 Combustion Air Fan Test ............................................................................................................  601

7

Circuit Diagrams

7.1

General .................................................................................................................................................  701

8

Servicing

8.1

General .................................................................................................................................................  801

8.2

Work on the Heater...............................................................................................................................  801

8.3

Work on the Vehicle..............................................................................................................................  801

8.4

Heater Test Run....................................................................................................................................  801

8.5

Servicing ...............................................................................................................................................  801

8.6

Visual Inspections and Installation Regulations....................................................................................  803

8.6.1 Connection to the Vehicle's Cooling System ..............................................................................  803
8.6.2 Connection to the Vehicle's Fuel System ...................................................................................  803
8.6.3 Dosing Pump ..............................................................................................................................  805
8.6.4 Fuel Filter....................................................................................................................................  806
8.6.5 Combustion Air Supply ...............................................................................................................  806
8.6.6 Exhaust Line ...............................................................................................................................  806

8.7

Removal and Installation.......................................................................................................................  807

8.7.1 Heater, Removal and Installation................................................................................................  807
8.7.2 Replacement of Circulation Pump ..............................................................................................  807
8.7.3 Replacement of Temperature Limiter .........................................................................................  807
8.7.4 Replacement of Temperature Sensor.........................................................................................  807
8.7.5 Replacement of Combustion Air Fan..........................................................................................  807

8.8

First Operation ......................................................................................................................................  807