Hi
A year or so back I moved into a lovely home complete with a Potterton Suprima 80 boiler.
Yes, you know what's coming. Had the usual problems with it (having to press the Reset button every 20 mins), so I eventually bit the bullet and had the upgraded PCB installed. All fine for about a month, using hot water only coming on twice a day for 20 mins.
A week or so back, I thought I'd run the central heating, so switched that on - fine for a day or two, but then the dreaded red light (lockout) came back to haunt me. It now appears whenever I turn on either central heating or hot water for more than 10 or 15 mins.
Now, the installation manual states that if you press the reset button for 10 secs and release, you'll see a sequence of flashing lights to indicate what the fault might be. A sequence of 5 red flashes in 5 secs means the overheat cutout has kicked in. Fine, except I get 10 flashing reds over about 15 seconds - the sequence then halts for a couple of secs, then repeats itself. Needless to say the manual says nothing about a sequence of ten red flashes...
Does anyone know what the 10 flashes in a row means?
Also, any ideas what might be causing the system to lockout? The outflow pipe seems to get mightily hot, even with the boiler temperature set to the minimum, but I've not managed to find a way of measuring the temperature (it's meant to be 55c at its lowest).
The chap who installed the PCB suggested the heat exchanger might be clogged up, getting too hot and causing the cutout. Strange though how it worked fine for a good month before hitting a problem.
I've tested the thermistor and overheat sensor using the tests in the manual, and they appear to be OK.
Cheers.
A year or so back I moved into a lovely home complete with a Potterton Suprima 80 boiler.
Yes, you know what's coming. Had the usual problems with it (having to press the Reset button every 20 mins), so I eventually bit the bullet and had the upgraded PCB installed. All fine for about a month, using hot water only coming on twice a day for 20 mins.
A week or so back, I thought I'd run the central heating, so switched that on - fine for a day or two, but then the dreaded red light (lockout) came back to haunt me. It now appears whenever I turn on either central heating or hot water for more than 10 or 15 mins.
Now, the installation manual states that if you press the reset button for 10 secs and release, you'll see a sequence of flashing lights to indicate what the fault might be. A sequence of 5 red flashes in 5 secs means the overheat cutout has kicked in. Fine, except I get 10 flashing reds over about 15 seconds - the sequence then halts for a couple of secs, then repeats itself. Needless to say the manual says nothing about a sequence of ten red flashes...
Does anyone know what the 10 flashes in a row means?
Also, any ideas what might be causing the system to lockout? The outflow pipe seems to get mightily hot, even with the boiler temperature set to the minimum, but I've not managed to find a way of measuring the temperature (it's meant to be 55c at its lowest).
The chap who installed the PCB suggested the heat exchanger might be clogged up, getting too hot and causing the cutout. Strange though how it worked fine for a good month before hitting a problem.
I've tested the thermistor and overheat sensor using the tests in the manual, and they appear to be OK.
Cheers.