Technical Service Bulletin

Detailed fault codes at coding address 38

Applies to: Multiple series of Vitodens 200/222 (details below)

Important Disclaimer

The information in this bulletin is intended exclusively for licensed heating contractors, and is NOT intended for the end user. This material is NOT intended to take the place of the information contained in the manuals shipped with the product.

Use of this information by unqualified personnel may result in property damage, personal injury or death.

End users are asked to contact a qualified contractor for all installation and service work. If you need assistance finding a contractor in your area, contact your Viessmann Sales Representative, or use our Contractor Locator.

By hitting "Yes" below you confirm that you have read, understood and agree to this warning, that you are licensed and hold the current, appropriate licences to work on said equipment in the location and/or jurisdiction of installation.

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Applies to:

◾   Vitodens 200, WB2B Series (all models)
◾   Vitodens 200-W, B2HA & B2HB Series (all models)
◾   Vitodens 222-F, B2TA & B2TB Series (all models)



In order to provide additional troubleshooting resources for our contractors, information about the  detailed fault codes  stored in  coding address 38  has been published in the latest editions of the Start-up and Service Instructions for Vitodens 200-W and 222-F.

These detailed fault codes can also be found in our  Fault Code Checker  webapp.

A complete listing of the detailed fault codes is also available in spreadsheet (XLSX) and PDF format, via the download links below.



Viessmann Technical Services


Bulletin ID:


Date issued:

May 26, 2017

Updated on:

November 30, 2017

Revision #:


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