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Daikin COP / energy used measurement from MMI

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(@squarepeg77)
Eminent Member Member
128 kWhs
Joined: 7 months ago
Posts: 19
Topic starter  

Hi,
I have a Daikin Altherma 9kW EDLA09DA3V3 with the "man machine interface" (MMI) running UI version 7.1.0.

The MMI can display electricity usage and heat produced, but I'm getting basically 0kWh for the electricity usage. Some days report 0kWh, others 1kWh, but never more than that. The head produced metric looks plausible. The ONECTA app shows the same, inaccurate, electricity usage.

I've raised this with Daikin and they suggested reseting the energy stats and powering the unit off for a while. I've done that, but there's been no discernible change in the measurements. I've also raised it with my installer (Octopus), but they've not made any suggestions yet.

Does anyone else have a similar system and do you get sensible stats for electricity used?

Thanks,

Jonathan

IMG 1903
IMG 1904

 


   
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Toodles
(@toodles)
Noble Member Contributor
5622 kWhs
Joined: 2 years ago
Posts: 868
 

Hello again Squarepeg 77, yes, we have a Daikin EDLA08E2V3 (heating only, not DHW) and like you, have doubts about the accuracy of the consumption and heat output statistics displayed on the MMI. They seem very granular to me, I either see ‘1’ or ‘2’ kw/H shown against a given 2 hour period. I suspect that the metering of consumption is very basic and possibly a little too crude for any degree of accuracy. Mine at least does show believable consumption figures that appear the same on the Onecta app (who thinks of these names?!) I will attempt to attach a screenshot of today’s Onecta display topically. One thought though, there are settings for the metering device which I think is to allow for different meters and the number of pulses given per kW and perhaps this is not set cprrectly at the present. They may be found by going to the installer profile (5-6-7-8) and looking under energy I think.Regards, Toodles

IMG 0411

 

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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Toodles
(@toodles)
Noble Member Contributor
5622 kWhs
Joined: 2 years ago
Posts: 868
 

I might add that we have had an Evergreen ‘Homely’ smart controller fitted 2 weeks ago and hope to report further on this soon; I am in contact with their rep who along with his technical team are currently monitoring my system remotely via the D-Comm and Hub. I suspect that the source of data for consumption will remain unchanged as I do not have any separate consumption metering for just the heat pump circuit. Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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(@squarepeg77)
Eminent Member Member
128 kWhs
Joined: 7 months ago
Posts: 19
Topic starter  

@toodles I’ve found the setting in the Installer menu and on my system “Electricity meter 1” is currently set to None. There are lots of options. Would you be able to tell me what yours is set to?

My reading of the help entry is that I should be set to None, but maybe Daikin consider the MMI as an “external meter”. 


   
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Toodles
(@toodles)
Noble Member Contributor
5622 kWhs
Joined: 2 years ago
Posts: 868
 

@squarepeg77 I think mine is set to the first (lowest) option in the list. Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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(@squarepeg77)
Eminent Member Member
128 kWhs
Joined: 7 months ago
Posts: 19
Topic starter  

@toodles I changed mine to “1/10kWh” yesterday, but I’m not seeing any change to the energy usage reported by the MMI or ONECTA.


   
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Toodles
(@toodles)
Noble Member Contributor
5622 kWhs
Joined: 2 years ago
Posts: 868
 

@squarepeg77 Sorry, I’ll check mine later and write again. Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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Toodles
(@toodles)
Noble Member Contributor
5622 kWhs
Joined: 2 years ago
Posts: 868
 

Have now checked, mine is set on ‘None’ - so that gets you precisely… nowhere I think! Sorry! Regards, Toodles.

Toodles, 76 years young and hoping to see 100 and make some ROI on my renewable energy investment!


   
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(@jeromed77)
New Member Member
21 kWhs
Joined: 6 months ago
Posts: 1
 

I have altherma 3 h ht 16 kw and the same problem. Problem started last year. Until last year (2 years) was consumption of energy working just fine and worked well. Until last year is every day 0 kw. I need that information, but nobody od Daikin can not help me. What to do ? 


   
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(@bob77)
Trusted Member Member
292 kWhs
Joined: 2 years ago
Posts: 36
 

I have a similar Daikin system and although it seems to accurately show the electricity used, I have my doubts over the accuracy of the heat produced.

According to the system it only produced 10,000 kWh of heat in a year, at a COP of 2.6. My heat loss calculations suggest it should be more like 14,000 kWh which would make the COP more like 3.6.

 

As for the "electricity in", my installer fitted a separate meter on the incoming supply, and it agrees pretty closely with what the unit thinks it has used (4425 kWh since installation on the external meter, versus 4441 kWh on the unit display).


   
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(@crasher)
Active Member Member
51 kWhs
Joined: 3 months ago
Posts: 7
 

@squarepeg77 did you ever get anywhere with finding a solution to the problem with electricity usage reading 0kWh?

My unit has started doing the very same thing since last week. I can't seem to be able to get any answers on how to resolve it.

Thanks.


   
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 HCas
(@hcas)
Trusted Member Member
222 kWhs
Joined: 2 months ago
Posts: 29
 

Were you able to solve the lack of electricity usage data?

Did anyone try to access the Onecta API directly? So not through the app or via the MMI, but directly in the API. 


   
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