Plumbing Questions? Ask a Plumber for Answers ASAP
Hi my name is Brian, Before going any further check the fuse, if its not that I am sorry to say that this is quite possibly the microprocessor in the main unit. Which will possibly be in the loft or in a cupboard this will in my opinion need someone hands on with the technical knowledge regarding these units. I apologise for not being able to assist on this occasion, if you wish to cancel this question please contact a moderator they will assist you with this request.