To Next Page

To Previous Page

Table of contents Thermo 90 S / Thermo 90 ST

6 Function tests

6.1 General................................................................................................................................................. 601

6.2 Settings................................................................................................................................................. 601

6.2.1 Setting the CO

content.............................................................................................................. 601

6.3 Testing individual components.............................................................................................................. 601

6.3.1 Resistance test of the temperature sensor................................................................................. 601

6.3.2 Resistance test of the glow plug................................................................................................. 601

6.3.3 Resistance test of the flame monitor .......................................................................................... 601

6.3.4 Testing the combustion air fan.................................................................................................... 601

7 Circuit diagrams

7.1 General................................................................................................................................................. 701

8 Service work

8.1 General................................................................................................................................................. 801

8.2 Work on the heater ............................................................................................................................... 801

8.3 Work on the vehicle .............................................................................................................................. 801

8.4 Heater trial run ...................................................................................................................................... 802

8.5 Service work ......................................................................................................................................... 802

8.6 Visual inspections and installation instructions..................................................................................... 804

8.6.1 Connection to the vehicle cooling system................................................................................... 804

8.6.2 Connection to the vehicle fuel system ........................................................................................ 804

8.6.3 Metering pump with damper....................................................................................................... 807

8.6.4 Fuel filter..................................................................................................................................... 807

8.6.5 Combustion air supply................................................................................................................ 807

8.6.6 Exhaust line................................................................................................................................ 808

8.7 Removal and installation....................................................................................................................... 808

8.7.1 Heater, removal and installation ................................................................................................. 808

8.7.2 Changing the circulating pump ................................................................................................... 809

8.7.3 Changing the temperature limiter ............................................................................................... 809

8.7.4 Changing the temperature sensor.............................................................................................. 809

8.7.5 Changing the combustion air fan................................................................................................ 809

8.8 Start-up ................................................................................................................................................. 809