Heat Meters Master/Slave Mode

[Sebbel1990]

Hi,

I have a single Alpha Innotec Luxtronik 2.0 controller with two LWD7 compressors.

They work in a Master/Slave mode in which one compressor is mainly used for heating and the other one is mainly used for hot water production. If necessary the compressors support each other.

In the official Alpha Innotec app, in 3rd party apps and in this integration I only see the internal metering of the heat production only for compressor No. 1.
For the 2nd compressor I need to check the menu at the Luxtronik controller itself.

So the data is there but I couldn't find anything that can show the data anywehere else but in the controller itself.

The question is: Is there any possibility to get the heat production, hot water production and total heat production data of the 2nd compressor from some internal register?

That would be great.

[Sebbel1990]

I used an AI which told me that there should be some Data in 1015,1016,1017,1018 and 1010

Would be nice to include these.
I can also test this if necessary.

[Sebbel1990]

I did some research and found out that in my case "Param 1015" is the "heating energy" of compressor 2 and "Param 1016" is the "hot water energy" of compressor 2.

It would be great if someone could make them available in this automation

[rhammen]

Hi @Sebbel1990,

Thanks for digging this out — your mapping is right. The luxtronik library this integration builds on already knows the block by name, it just never assigned a type to it, so nothing reads it:

Param	Name	Meaning
1010	ID_Einst_isTwin	twin / master-slave configuration flag
1015	ID_Waermemenge_Hz_2	heating energy, compressor 2
1016	ID_Waermemenge_BW_2	hot water energy, compressor 2
1017	ID_Waermemenge_SW_2	pool energy, compressor 2
1018	ID_Waermemenge_Seit_2	total energy since reset, compressor 2

That's a one-to-one copy of the compressor-1 counters (854/878/879/852), so exposing them as four more energy sensors is straightforward. The catch is that you are, as far as I can tell, the first twin unit we've seen: every diagnostics dump I have (about 30 different heat pumps) reads isTwin = 0 and all four _2 counters at 0. So I can't verify the details from existing data — I need three things from you:

1. A diagnostics download from Home Assistant: Settings → Devices & services → Luxtronik → the three-dot menu on the integration entry → Download diagnostics. Attach the JSON here. That gives me your firmware version, isTwin, and the raw values of the whole 1005–1018 block in one go.

2. One raw value next to the controller's display. The compressor-1 counters are stored in units of 0.01 kWh, and the _2 ones almost certainly are too, but "almost certainly" isn't good enough for a total_increasing energy sensor that feeds the energy dashboard. Please note the kWh figure the controller shows for Wärmemenge Heizung of compressor 2 at roughly the same time as the dump — if raw 1015 ÷ 100 matches it, we're done.

3. What does the controller show for compressor 1 — only compressor 1, or the total? The existing "heat amount heating / hot water" sensors read calculations 151/152. If the controller's compressor-1 page and those sensors agree, they are per-compressor and I'll add a summed "total" sensor on top. If the controller shows a total somewhere that differs from both, tell me where and what it reads.

Once the dump is in I'll open a tracked issue for it and you'll get a pre-release to test. If you'd also like the second unit's temperatures/status (there is a block of *_2 calculations for that) say so — it's a natural follow-up but a bigger change.

[Sebbel1990]

Hi, thanks for answering and checking my specific setup.

I'm on holiday right now but I'll send you everything after I return home in October.

[Sebbel1990]

So, a bit earlier than expected

1. I have attached diagnostic data, but I removed some stuff regarding other integrations which showed up in there.

2 / 3. I have attached photos from compressor 1 and 2 (right top corner). There is a seperate metering for "heating" and "hot water" for each compressor. "Total" as well. They are not summed up in compressor 1!

Only the value for the electric heater (2nd) is the same on both compressors.

The numbers in the json and on the display of the Luxtronik fit. But in the json is no point (.) and the json seems to have 2 digits behind where the (.) should be while the display only shows 1.

1015: json 10802976, controller display 108029.7
1016: json 6194614, controller display 61946.1
config_entry-luxtronik2-4d09d986cf2c946bb2135d9fdeb3e4d2.json

[rhammen]

Thanks, that's everything I needed, and quicker than expected, so enjoy the rest of your holiday.

Your dump and photos match register for register:

Display (page 2)	Register	Raw → display
Heizung	1015	10802976 → 108029.7 kWh
Warmwasser	1016	6194614 → 61946.1 kWh
seit 2.10.20	1018	15528261 → 155282.6 kWh
seit Reset	1061	17004612 → 170046.1 kWh

On the extra digit: the controller stores these in 0.01 kWh and the display drops the last digit. It doesn't round, which is why 108029.76 shows as 108029.7.

Your answer to question 3 settles one more thing. The existing "heat amount heating / hot water" sensors match your page 1 exactly, so they are compressor 1 only, not a total. That means a summed "both compressors" figure would be new information, not a duplicate of something the controller already shows.

Your unit also answered a question you didn't know we had. It's the first series-4 controller (V4.81.3) we've seen. Its "Zweit.-Wärmeerz" counter confirms the auxiliary heater's energy scale for that series: 1579.8 kWh over 176 h of heater run time works out to 9.0 kW, exactly your element's rating.

I've opened #815 to track the work: four compressor-2 energy sensors, created only on units that report themselves as twins (parameter 1010 = 1, which reads 0 on every other heat pump we've seen). I'll post here when there's a pre-release for you to test.