We may have found other answers which could help you.
Click here for Room Thermostat Workingdrayton digistatrf1 wireless system?
Digistat Drayton connection?
drayton room thermostat display screen is blank?
how to replace batteries in my Drayton Digistat RF1?
Drayton Digistat RF2 Wireless system?
Drayton sm2 timeswitch?