immersun repair -no.3

Tinbum
Posts: 1031
Joined: Mon May 31, 2021 9:55 pm

Re: immersun repair -no.3

#91

Post by Tinbum »

Teamplayer wrote: Wed May 08, 2024 1:56 pm Thank you all for your help, please see photos and U5 slot is what we need to know is please. Thank you
Image

Image

Image
Marcus- U5 not U2. :roll:

Looks like your pcb.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
Marcus
Posts: 241
Joined: Mon Nov 08, 2021 6:25 pm

Re: immersun repair -no.3

#92

Post by Marcus »

:D

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
Wide angle shot for context as the pcb is not identical
20240508_171222.jpg (280.88 KiB) Viewed 2168 times
20240508_170021.jpg
20240508_170021.jpg (97.77 KiB) Viewed 2173 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
Teamplayer
Posts: 5
Joined: Tue May 07, 2024 3:49 pm

Re: immersun repair -no.3

#93

Post by Teamplayer »

Thank you Marcus for your help, hopefully it will be working soon
AGT
Posts: 696
Joined: Sat Jan 29, 2022 11:26 am

Re: immersun repair -no.3

#94

Post by AGT »

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?
Marcus
Posts: 241
Joined: Mon Nov 08, 2021 6:25 pm

Re: immersun repair -no.3

#95

Post by Marcus »

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
Bfly1
Posts: 1
Joined: Sat Jun 15, 2024 11:45 am

Re: immersun repair -no.3

#96

Post by Bfly1 »

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
Post Reply