Webasto Coolant Heater Thermo 90, 90S Workshop Manual PDF

This PDF Workshop Manual is intended to support familiar personnel in the repair of Webasto Thermo 90 and Thermo 90 S coolant heaters.

This guide has been prepared to provide information regarding structures, features, and repair procedures for Webasto Coolant Heaters. This workshop manual contains instructions for repair and maintenance, detailed diagrams, and installation instructions, designed to serve Webasto Coolant Heaters.

You can study this pdf manual using screenshots and a list of content, which is presented in the manual description. You can also follow the link 'Webasto pdf manual instant preview', and preview the pages of this manual.

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Models covered:
Coolant Heater
Thermo 90
Thermo 90 S

Contents:
1. Introduction
1.1 Scope and Purpose
1.2 Meaning of Warnings, Cautions, and Notes
1.3 Additional Documentation to be used
1.4 General Safety Regulations and Information
1.5 Corrections and Improvements
2. General Description
2.1 Combustion Air Fan
2.2 Heat Exchanger
2.3 Temperature Sensor
2.4 Temperature Limiter
2.5 Burner Insert
2.6 Glow Pin
2.7 Flame Sensor
2.8 Combustion Tube
2.9 Circulation Pump
2.10 Control Unit
2.11 Fuel Dosing Pump
3. Functional Description (Fig.3-1)
3.1 Switch-on
3.2 Heating Operation
3.3 Control Operation
3.4 Switch-off
3.5 Malfunctions
4. Technical Data (Standard Measure)
4. Technical Data (Metric Measure) 
5. Troubleshooting
5.1 General
5.2 General Failure Symptoms
5.3 Failure Symptoms after Switch-off upon Failure
5.4 Storing a Fault Code in Memory
5.5 Visual Inspection for Assessment of Burner Condition
6. Functional Tests
6.1 General
6.2 Adjustments
6.3 Components Testing
7. Circuit Diagrams
7.1 General
8. Servicing
8.1 General
8.2 Work on the Heater
8.3 Work on the Vehicle
8.4 Heater Test Run
8.5 Annual Maintenance
8.6 Visual Inspections and Installation Regulations
8.7 Removal and Installation
8.8 First Operation
9. Repair
9.1 General
9.2 Disassembly and Assembly