In April I moved into a house with a Volkera (Unica 28HE) boiler and an Altech programmable thermostat with RF. (Installed Feb 2009).
Now that it's cold I have tried to turn the CH on (boiler has worked fine for hot water all summer). I had to change the batteries in the thermostat but I have managed (I think) to programme the on /off times and I have turned the boiler switch to the right place for it to receive signals but nothing has happened.
Yesterday I had several phone calls with a helpful young man in technical help at Altech who talked me through the steps of checking/changing frequency (changing 'jumper' positions on both thermostat and control panel on wall).
I have done this many times, trying different combinations but all I have achieved is 3 green flashes on the wall unit LED and then resolutely back to red.
Please - what am I doing wrong?
Now that it's cold I have tried to turn the CH on (boiler has worked fine for hot water all summer). I had to change the batteries in the thermostat but I have managed (I think) to programme the on /off times and I have turned the boiler switch to the right place for it to receive signals but nothing has happened.
Yesterday I had several phone calls with a helpful young man in technical help at Altech who talked me through the steps of checking/changing frequency (changing 'jumper' positions on both thermostat and control panel on wall).
I have done this many times, trying different combinations but all I have achieved is 3 green flashes on the wall unit LED and then resolutely back to red.
Please - what am I doing wrong?