CH controller dead or just the battery?

[gndean]

I have a Landis & Gyr RBW200 central heating control panel that recently has just "died". I say died: what is happening is that the LCD display is just about readable but is very, very faint. Some of the controls appear to work (adjust clock, change on/off times) but others don't (advance and boost buttons for CH or hot water).

I've taken the control panel off wall and it has a 2 cell NiCd battery in it (2/V60R). Measuring the voltage across this when in place, shows 2.45 V which I would have thought is about right for 2 NiCd cells.

So, is the control panel dead or does the battery just need replacing?

Thanks,

Graham.

 

[gndean]

By the way, I have the tried the reset button. While this is pressed, all segments of the LCD display show. When the button is released, the controller returns back to its dead state.

 

[gas4you]

For how cheap a new controller is I would replace it. Yours must be getting a bit long in the tooth by now I would think