We may have found other answers which could help you.
Click here for Wireless Digistat Receiverdrayton room thermostat display screen is blank?
how can i fix thermostat?
Drayton Digistat +RF Model RF-601?
Drayton Digistat+2 RF?
how to replace batteries in my Drayton Digistat RF1?
Digistat Drayton connection?