We may have found other answers which could help you.
Click here for Rdj10rf Lights Reset
red flashing button siemens RCRIO/433?
Siemens RDJ10RF thermostat problem?
I cannot locate my Siemens receiver?
siemens rwb9 connections to boiler?
Thermostat issues- Siemens RDH10RF?
Have I got got a faulty programmer?