you can find it in the installation manual
to find out which manual use the link below;
http://www.ariston.co.uk/ariston-product-manuals/discontinued-products/0000000001/0000000002/
emma
December 2010
Might be condensate sensor or low circuit pressure. There is no documentation from Ariston. Press reset buttong and hope for the best.
steve
February 2010
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