Ah, yes, the MK1. Actually looks like a very similar failure to this one (triac, current sensor & opto I'm guessing, but haven't investigated yet).
Luckily U5 is still readable on this one even though one of it's legs has gone: ACS712T 20A current sensor.
Attachments
Wide angle shot for context as the pcb is not identical
20240508_171222.jpg (280.88 KiB) Viewed 2825 times
20240508_170021.jpg (97.77 KiB) Viewed 2830 times
450W hydro-electric
5110W pv
1.3kw Wt2 - not yet producing 6kWh lead acid - maybe 1kwh useable
LiMnCo battery made from 2nd hand hybrid car modules 3.6kwh nominal 24v.
300lt hot water tank and two storage heaters
ASHP Grant Aerona 3 10.5kw and UFH
AGT wrote: ↑Wed May 08, 2024 8:46 pm
And are these faults all caused by excessive hours in diversion mode?
Can you add heat sinks to heat sinks ( bolt on)to give more capacity, or is it easier to rig up fans as others have done?
difficult to say. The one here was closed in a cupboard along with a 3Kw inverter, so maybe high temperature played a part. But it worked ok there for several years.
450W hydro-electric
5110W pv
1.3kw Wt2 - not yet producing 6kWh lead acid - maybe 1kwh useable
LiMnCo battery made from 2nd hand hybrid car modules 3.6kwh nominal 24v.
300lt hot water tank and two storage heaters
ASHP Grant Aerona 3 10.5kw and UFH
This is a million to one shot. My immersun has given up the ghost. Seven years old. It suited my needs and I miss it. Had it disconnected for safety but would love to find someone near me who could repair rather than have to replace. Would rather pay a hundred than several hundred in these times. Live South England. Bath area.
Any suggestions please
Trish
Hi everyone
As you can see from my photos above I still have issues with getting the immersun working again, would anyone have a working PCB from the same model as mine or one they are certain would work in my model? Thank you all for your help, anyone please?