Viessmann Vitodens 300 - Specific Component Repair Procedures

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Displayed

fault c ode

Con-

st.

Weat -

her-

com-

System

character-

istics

Cause Remedy

FF X X Burner

blocked

Internal fault Remove EMC inter-

ference. If the

equipment will not

restart, check the

boiler coding card

and r eplace, or

replace the control

unit.

Repairs

Checking the outside temperature sensor (weather-compen-

sated control units)

1. Pull plug X3 from the control unit.

Checking and acknowledging faults (cont.)

Troubleshooting

5692 537 GB

Main Page

Service Instructions1
Safety Instructions2
Table of Contents4
Initial Start-Up, Inspection, Maintenance5
Steps - Initial Start-Up, Inspection and Maintenance5
- Commissioning Steps6
- Inspection Steps6
- Maintenance Steps Page6
Further Details Regarding the Individual Steps7
- Filling the Heating System7
- Venting the Boiler9
- Venting the Heating System10
- Filling the Siphon with Water10
- Language Selection (if Required) - Only for the Weather-Compensated Control Units10
- Set the Time and Date (if Required) - Only for Weather-Compensated Control Units11
Checking the Gas Type11
- Gas Type Conversion12
Function Sequence and Possible Faults12
Checking Static and Supply Pressure14
Checking the CO 2 Settings16
- Setting the Max. Output18
- Checking the Balanced Flue System for Soundness (Annular Gap Check)19
- Removing the Burner and Checking the Burner Gasket (Replace Gasket Every Two Years)20
- Checking the Burner Gauze Assembly21
- Checking and Adjusting the Ignition and Ionisation Electrodes22
- Cleaning the Combustion Chamber/Heating Surfaces and Installing the Burner23
Coding40
Code 140
Calling up Code43
Code 243
Overall Summary44
Resetting the Coding to the Delivered Condition63
Service Scans64
Service Level Summary64
Temperatures, Boiler Coding Card and Brief Scans65
Checking Outputs (Relay Test)69
Scanning Operating Conditions and Sensors71
Troubleshooting74
Calling up Fault Code History74
Calling up Current Fault Codes74
Checking and Acknowledging Faults76
Repairs85
Function Description96
Constant Temperature Control Units96
Weather-Compensated Control Units98
Extensions for External Connections (Accessory)100
External Extension H102
Control Functions104
Designs109
Connection and Wiring Diagrams - Internal Connections109
Connection and Wiring Diagrams - External Connections111
Parts Lists113
Type Plate114
Commissioning/Service Reports120
Specification126
Certificates127
Declaration of Conformity127
Manufacturer's Certificate According to the 1St Bimschv [Germany]128
Keyword Index129

Viessmann Vitodens 300 - Specific Component Repair Procedures

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