Replacement of the over-temperature protection switch
(STB) / temperature controller at the defroster (preheater)
46
15. Mount all parts in reverse order.
16. Be sure that the cables are correctly in the guide groove.
When installing the heat exchanger box, ensure correct locking with the fan boxes by
means of the tongue-and-groove joint!
17. Connect the cable for potential equalisation to the flat plug of the casing cover.
18. Close the casing cover by turning the 4 captive screws of the quarter turn locks by 90°.
19. Re-establish the mains connection.
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