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Samsung E911 intermittent issue

 
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Air Source Heat Pumps (ASHPs)
Last Post by NetDonkey 8 months ago
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 NetDonkey
(@netdonkey)
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Topic starter 08/12/2024 5:09 pm  

@toodles worth giving that an inspection?



   
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Toodles
 Toodles
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08/12/2024 5:27 pm  

@netdonkey Usually, this chamber will collect a thin black film of very fine particles and unlikely to impede the flow to any degree, however, having said that, it wouldn’t harm to clean it out but make sure you isolate by closing the valves on either side of the ‘magna clean’ chamber first! Regards, Toodles.


Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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Mars
 Mars
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08/12/2024 9:52 pm  

@netdonkey definitely give that a clean, following what toodles said, and tell us if it helped.


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 ASHP-BOBBA
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08/12/2024 10:47 pm  

@netdonkey Do you feel confident to check the filter, you should be able to isolate the valve ether side and normally open a drain on the bottom of the filter to confirm the pressure is gone, then you can unscrew the lid to clean it out, be aware some of these filters are fitted with a magnet and a spring inside, this will need to be assembled back as it was after cleaning.

The code for the fault is low water flow so best to investigate if it is restricted or air locked. 

Do you know what the water pressure is in the system? 

 

 


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 NetDonkey
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Topic starter 08/12/2024 10:52 pm  

@ashp-bobba reasonably confident to have a look at it.  The current system pressure is 1.7bar which from googling seems ok.



   
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 ASHP-BOBBA
(@ashp-bobba)
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08/12/2024 11:59 pm  

@netdonkey agreed, sounds ok pressure.

Quick question I just thought of, can you take a picture of the flow sensor assuming the engineers fitted it to the return pipe to the condenser, I remember Samsung explaining to me that this sensor only works in 2 orientations and that there are restrictions, for example (and I am tying to remember a year ago now) it must be flow up and have something like 100mm before the sensor and 300mm after before any fittings to prevent turbulence or air bubbles and prevent it from miss reading, or horizontal with similar restrictions. 

 

Just trying to rule a few things out.

 


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 09/12/2024 10:19 am  

@ashp-bobba pics attached.

IMG 4265
IMG 4266

 

Flow direction indicator in it points upwards


This post was modified 9 months ago by NetDonkey

   
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 ASHP-BOBBA
(@ashp-bobba)
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09/12/2024 11:21 am  

@netdonkey Ok, that looks correct to me and a nice amount of pipework above the sensor. 

Does the system fail on flow when heating the water as well or is it just when on heating? Are you able to check what the flow rate is when on hot water?

Let me know how you get on cleaning the in line filter. 


Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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 NetDonkey
(@netdonkey)
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Topic starter 09/12/2024 11:35 am  

@ashp-bobba It trips on both but more frequently with DHW.  Re the flow rate when ion DHW, I think its the same FSV but will have a look



   
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 ASHP-BOBBA
(@ashp-bobba)
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09/12/2024 12:21 pm  

@netdonkey Ok. Can you give me the model and serial of the cylinder so I can work out the ports, I cant quite see the badge and different manufacturers use different ways for the bottom mounted buffers which this look like, I am not sure if I am placing the flows the correct way round. 

Pink is ASHP flow

Blue is ASHP return

Red Buffer F/R

Orange DHW F/R

Green Circle (assumed heating pump and connections)

 

Screenshot 2024 12 09 at 10.52.20

Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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Transparent
 Transparent
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09/12/2024 3:23 pm  

Oh great!
We now have someone else here who can doodle on top of photos 😀 

Can I please check @ashp-bobba that my arrow is pointing to the flow sensor which you've been discussing with @netdonkey ?

image

And I've turned on the light in the cupboard so we can more easily see the black component parts in the gloom.

 

Net Donkey - you might want to ask Santa for some pipe lagging with a wide bore to insulate around those brass valves.

Any pipes and metalwork within 1-mtr of the cylinder will be sucking heat out of it...
... even the pressure-relief valve and down-pipe on the right, which doesn't have water in it.

BES sell a good range of Kaiflex Class-O insulation with bores up to 54mm.

armaflex class 0 bk

Glue the slit-sides back together with Impact Adhesive.... the sort you leave to dry on each half before pressing them together.


Save energy... recycle electrons!


   
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 ASHP-BOBBA
(@ashp-bobba)
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Posts: 227
09/12/2024 3:39 pm  

@transparent Hello, yes thats correct or at least it appears to look like it, this is the flow sensor that needs to be on the return pipe back to the ASHP condenser and is the little 5 wired bit of magic that causes all them errors when there is a lack of flow 🙂

I thought adding arrows to the picture may help as I was trying to work out which part of the circuit was doing what, something was not looking quite correct but I didnt want to work it out until I can see the cylinder diagram and confirmed the location identity of all ports on that multi port cylinder.

 

 

 

 

 


Professional installer. Book a one-to-one consultation for pre- and post-installation advice, troubleshooting and system optimisation.


   
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