Electronic Control Board; Main Transformer - Vaillant TURBOmax Pro 28 Instructions For Installation And Servicing

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4
4
Fig. E.9: Electronic control board
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7
Fig. E.10: Main transformer
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4
3 4
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PARTS REPLACEMENT

Electronic control board

1
Refer to the important information
and initial preparation on page 45.
Lower control box.
Unclip the terminal box cover by
releasing the cover retaining clips
and lift to remove.
Unclip the electronic board cover
by releasing the clips (2) and lift to
remove.
Disconnect both HT leads from
electronic board.
Unplug all leads from the board.
Disconnect main power supply and
any external controls.
Push four retaining spring clips (4)
out, carefully lift out electronic
board.
Remove the electronic display by
releasing the retaining clips.
Carefully insert the new electronic
board into the control box.
Insert the electronic display by
carefully lining up the pins and
push until the display locks in to
position.
Re-assemble in reverse order.
5

Main transformer

Refer to the important information
and initial preparation on page 45.
Lower control box.
Unclip the terminal box cover by
releasing the cover retaining clips
and lift to remove.
Unclip the electronic board cover
by releasing the clips and lift to
remove.
Unplug the transformer connecting
lead.
8
Move clips outwards and remove
transformer.
Re-assemble in reverse order.
51