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The speed of answering here is amazing. Thank you!

All looks ok so far. just last question regarding the bypass route, there is a red tap there - it allows water to be returned to the boiler just before the CH & HW valves - should this tap be normally open or closed? I cant remember how it was originally.

will do. Thanks !!!

In my box at the moment its the other way around. Electrically speaking there is no difference (?) but I could take the power down again and reverse grey & orange in order to follow the standard way. Should i do this?

Hi seco, nothing! just these 2 alone.

I moved the black SwL to be with the greys. From first look everything looks OK now. It doesn't lockout anymore when you turn the heating off from the programmer which is good news. I also know that both valves are ok. What I dont understand is how the hell did it work before and who...

In addition/correction: 1. Block#10 is a permanent Live (from main power swich/fuse box). 2. Together with both orange wires in block#10 there is also the black wire that is going to the boiler block, in position 'SwL'. Shouldn't logically this black SwL be coming to the boiler from the...

ok this is what i find: 1. Both orange wires are connected together at block#10. 2. Both grey ones are together at block#6. This block is "floating" ie it does not continue anywhere from that point. Is this ok??? 3. Took both orange wires out of block#10. They were 0v both. 4. Block#10...

Tested the voltages: The orange wires from both microswitches/valves are connected to the same point (#10) in the wiring centre box. The voltages at this point: (1) During normal operation: Constant 240v. (2) During lockout: Constant 240v.

BTW, the panel/programmer is old and it looks there is no easy way to change a battery for it. So at the moment there is no battery backup there. Can this have something to do with this?

those valves (both) are closed automatically once the heating is stopped from the control panel. When I turn HW off at the panel the HW valve starts moving and will close. Exactly the same happens when I turn off CH (the CH valve will close). It takes around 10 seconds from the time I turn it...

thanks Matt, can I test the microswich in any way? for example, I just now moved the lever (on the valves) to the open side (so both valves are forced to the open position), I then go to the control panel and switch the heating off from there. But the boiler keeps on running (well I gave it...

well it definitely overheats, and extremely quickly. There is no way I can touch the outpot pipe... If I understand it correctly, once the timer reaches the end of the heating period at end of day (or manually from within the panel in the house) the 2 valves (HW & CH) both get moved...

bypass exists and open. Pump is connected to the wiring centre (not pcb). sorry for the little info - fairly new to boilers etc. like i said this thig only happens once heating period is over.

Hi, just started to have these lockout issues. Some gurgling and knocks seem to always accompany these lockouts (red light flashes). This is a brand new PCB (5111603) on a Suprima 100 and it mainly occurs right after the end of the heating period. When heating time is over I noticed the...