siemens rev23.03rf?

Hi we have a Siemens rev23rf transmitter and Rev-r.03/1 receiver. All was working fine until the battery ran out whilst we were away. I've replaced the batteries and have tried resetting, turning both on and off, tapping the receiver (which was on another Siemens thermostat question) and nothing is working. Does anyone have any other suggestions. Light are currently solid Amber and flashing green on receiver.

Thanks

Victoria
January 2016