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Samsung E911 intermittent issue

NetDonkey · 2024-12-06T21:32:07Z

Hi all, Been having a trawl through the forums for the E911 and have a few other queries. I have a AE080CXYDEK which was installed back in June and has been working well. Recently, however, we have had a couple of E911 errors which has led me to dig into our install a bit more. Using our MIM i can see the flow is around 7.2-7.4lpm which is almost at the HP's minimum in which the E911 error starts. I have queried our installer (electrician who installed the solar and battery and subsequently subbed the ASHP install out) and it's taking a while to get anywhere. So my queries are as follows: We have a Evosta 3 set to fixed curve regulation mode level3. Is this correct? It looks like the Evosta has been installed upside down but I assume it was done this way due to the flow direct? I can stop it from erroring by only running the heating and within 15 mins of powering on the DHW it trips (subsequently in the last 12hrs I have had both running and it hasn't tripped). Does this narrow down what the issue could be? In another thread, Mars mentioned checking the Y strainer. Is this easy to do as a novice or should I be pushing to get the plumber to come out and check. If it's easy where is it usually located and what does it look like? How happy are other plumbers to come out and diagnose a system they havent put it and is it worth doing this? Thanks!

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Air Source Heat Pumps (ASHPs)

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NetDonkey

(@netdonkey)

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Topic starter 20/12/2024 12:19 pm

Posted by: @ashp-bobba

↑

@netdonkey Primary pump should run as follows:

Heating demand on

DHW demand on

Defrost demand on

Secondary pump should run as follows:

Heating demand on

Defrost demand on (only of the volume of the buffer is not enough for the min volume for the ASHP to defrost)

Primary pump runs as described above. Secondary pump is constantly on until DHW is activated

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ASHP-BOBBA

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20/12/2024 12:53 pm

@netdonkey so you may find the pump is wired through the 3 port switch so when sitting in heating mode but the demand is off the pump runs all the time but when switched to DHW it switches off as the movement of the 3 port would break the 3 port switch, if so this would be the wrong way to wire, your wire centre with the ASHP should have electrical connections for the primary and secondary pump set, you should also be able to dip switch or programme the ASHP so it knows if you are using a buffer or just 3 port valve, this way the ASHP will know if to just run one or 2 pumps and when. Not all ASHP are exactly the same and I don't know all of them but most are very simular.

AAC Group Ltd covering the Kent Area for design, supply and installation of ASHP systems, service and maintenance, diagnostics and repairs.
Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.

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NetDonkey

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Topic starter 20/12/2024 12:56 pm

Posted by: @ashp-bobba

↑

@netdonkey so you may find the pump is wired through the 3 port switch so when sitting in heating mode but the demand is off the pump runs all the time but when switched to DHW it switches off as the movement of the 3 port would break the 3 port switch, if so this would be the wrong way to wire, your wire centre with the ASHP should have electrical connections for the primary and secondary pump set, you should also be able to dip switch or programme the ASHP so it knows if you are using a buffer or just 3 port valve, this way the ASHP will know if to just run one or 2 pumps and when. Not all ASHP are exactly the same and I don't know all of them but most are very simular.

Just heard back from Samsung and there is a software upgrade that will fix this logic so the secondary pump isnt always running.

This post was modified 1 year ago by NetDonkey

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ASHP-BOBBA

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20/12/2024 1:03 pm

@netdonkey excellent, that will help then 🙂

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Transparent

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20/12/2024 1:46 pm

Posted by: @netdonkey

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there is a software upgrade that will fix this logic so the secondary pump isnt always running

Is that upgrade applied automatically over-the-air to all Samsung units?

Or does it require the householder or installer to do something?

Save energy... recycle electrons!

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NetDonkey

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Topic starter 20/12/2024 1:49 pm

@transparent Samsung service rep coming out on 3/1

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Transparent

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20/12/2024 1:59 pm

Sheesh! Ash him/her how many sites they have to visit to implement the firmware change.
... and why they couldn't devise a system to do this remotely.

Yes, it might need the homeowner to authorise the upgrade within the App,

and it might need to be undertaken within a time-window in order to prevent hackers attempting such a route in future.

But we already have such functionality on the UK Smart Meter system, and that was designed a decade ago.

Save energy... recycle electrons!

👍

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ASHP-BOBBA

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20/12/2024 2:01 pm

@netdonkey thats great service

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Mars

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20/12/2024 8:55 pm

Posted by: @netdonkey

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@transparent Samsung service rep coming out on 3/1

Did you have to pay for the visit?

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NetDonkey

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Topic starter 20/12/2024 9:04 pm

@editor as it’s a software upgrade they are recommending, I’m not needing to pay. Going to pick their brains on all the questions I have when they get here too!!

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Mars

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20/12/2024 9:37 pm

@netdonkey could this be a first for Samsung? 😂 They do have a habit of charging for visits. I’m curious to see whether it’s an actual Samsung engineer or one of their many agents handling the call-out.

But fully agree in you maximising the visit and getting as much as info as you can out them. Looking forward to the update.

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NetDonkey

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