Hi all
I once again have an issue with my Vokera 20/80 RS Flowmatic. For some reason its started tripping the main RCD. Sometimes it'll trip the RCD immediately, sometimes it can take about half a minute or so.
Thinking that the problem could be a water leak getting onto a cable, I started searches for damp patches, and was happy(ish) to find a leak from the bottom of the DHW manifold's hot water outlet. I cleaned all this up, and sorted the leak and replaced the earth strap, so all was o.k and thought that this was the problem - except it wasnt.
Delving into it a bit more, I started eliminating parts, so I started by checking the other earth point - all o.k. I then disconnected the manual timer - no joy - then I thought the pump my be the cause, so I disconnected that from the back of the PCB, and that didnt help. I then read about the pressure switches being known to do this, so I discconected the pressure differential switch....and that didnt help either.
If you switch it on, you can hear a very faint crackle, with nothing else coming on (even with the timer disconnected, and no ch or hw being called for and even with the pilot light out), just before it trips.
The other thing to note is it takes out the whole Bank of RCD's, rather than just the circuit it is on. Initially, I thought it was another appliance, but even with all the other (4 of them) rcd's off, it'll still trip when the boiler is switched on.
Any ideas?
Cheers
Neil.
I once again have an issue with my Vokera 20/80 RS Flowmatic. For some reason its started tripping the main RCD. Sometimes it'll trip the RCD immediately, sometimes it can take about half a minute or so.
Thinking that the problem could be a water leak getting onto a cable, I started searches for damp patches, and was happy(ish) to find a leak from the bottom of the DHW manifold's hot water outlet. I cleaned all this up, and sorted the leak and replaced the earth strap, so all was o.k and thought that this was the problem - except it wasnt.
Delving into it a bit more, I started eliminating parts, so I started by checking the other earth point - all o.k. I then disconnected the manual timer - no joy - then I thought the pump my be the cause, so I disconnected that from the back of the PCB, and that didnt help. I then read about the pressure switches being known to do this, so I discconected the pressure differential switch....and that didnt help either.
If you switch it on, you can hear a very faint crackle, with nothing else coming on (even with the timer disconnected, and no ch or hw being called for and even with the pilot light out), just before it trips.
The other thing to note is it takes out the whole Bank of RCD's, rather than just the circuit it is on. Initially, I thought it was another appliance, but even with all the other (4 of them) rcd's off, it'll still trip when the boiler is switched on.
Any ideas?
Cheers
Neil.
