While you wait for answers, we may have found some information which could help you.
Success
Message
How to use Siemens RWB7 central heating controller?
Siemens brtrf keep LOSING connection?
red flashing button siemens RCRIO/433?
I cannot locate my Siemens receiver?
Room thermostat?
siemens rwb9 connections to boiler?
How do i stop the time from flashing on the Siemens RDJ100RF?
Rdh10 & RCR10/443-GB by seimens?
Siemens RDJ10RF thermostat problem?
Have I got got a faulty programmer?
Thermostat issues- Siemens RDH10RF?
Thermostat not working?