How to Factory Reset Novoferm Operators

A quick and easy guide to performing a factory reset on a Novoferm operator. This will return the unit to its factory settings.
Operator models this guide is suitable for:
Novomatic 403, 423, 553, 553 S, 553 S III, 563 S, 803, 803 S
Novoport, Novoport II, Novoport III, Novoport IV
Novorol, Novorol 20
DC650T, DC800T
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