TRV10RFM : Questions & Answers (6.1.1) .
Description :
This section aims to provide quick answers to any questions you may have and to signpost you to the relevant document if more information is required.
What kind of batteries should I use ?
Your TRV10RFM is fitted with 2 x AA Alkaline Batteries (Non-Rechargeable).
My TRV10RFM has a permanent red light ?
If your TRV10RFM has a permanent red light displayed, then it has lost adaption with the radiator valve.
(Refer to: Doc. )
My TRV10RFM is not always responding immediately ?
Your TRV10RFM will not respond immediately. The built-in software will allow the TRV to detect how quickly the room is warming up or cooling down, so there may be a delay.