Hi all,
I have a Turbomax plus 824E (or 242/2). Been having a problem the last couple of days with it locking out with code F24. Reset and all is fine, for a while, but it's doing it a couple of times a day.
Servicing manual suggests this code is due to pump failure, low flow, air lock etc.
Pump sounds/feels like it's running, and CH is working. Have bled pump using screw on front. Auto vent is open above pump. Not convinced it's either airlock or pump (but would appreciate any guidance on how to test pump further).
Some history:
Couple of years ago DHW not very hot. DHW clogged with iron oxide. Cleaned out, pipes flushed and magnaclean added.
Since then had similar problem with DHW, replaced plate to plate HEX and that improved matters. (Not convinced water is still that hot - but cold feed feels sub zero at the moment, and it is now good enough for a comfortable shower again.) Also replace PRV at same time as pressure had been slowly dropping and PRV was dripping.
Given the history of sludge and secondary hex blockage, I'm concerned that the problem might be with blockage of the primary heat exchanger. Is this likely, and if so is it possible to clean with water/acid/lemon juice etc? The price of a new primary heat exchanger gave me a bit of a shock...
And if not, how could I test to narrow down problem further?
Cheers for any assistance.
I have a Turbomax plus 824E (or 242/2). Been having a problem the last couple of days with it locking out with code F24. Reset and all is fine, for a while, but it's doing it a couple of times a day.
Servicing manual suggests this code is due to pump failure, low flow, air lock etc.
Pump sounds/feels like it's running, and CH is working. Have bled pump using screw on front. Auto vent is open above pump. Not convinced it's either airlock or pump (but would appreciate any guidance on how to test pump further).
Some history:
Couple of years ago DHW not very hot. DHW clogged with iron oxide. Cleaned out, pipes flushed and magnaclean added.
Since then had similar problem with DHW, replaced plate to plate HEX and that improved matters. (Not convinced water is still that hot - but cold feed feels sub zero at the moment, and it is now good enough for a comfortable shower again.) Also replace PRV at same time as pressure had been slowly dropping and PRV was dripping.
Given the history of sludge and secondary hex blockage, I'm concerned that the problem might be with blockage of the primary heat exchanger. Is this likely, and if so is it possible to clean with water/acid/lemon juice etc? The price of a new primary heat exchanger gave me a bit of a shock...
And if not, how could I test to narrow down problem further?
Cheers for any assistance.