Bryant AC unit

When my AC turns on Sense will alert me telling me my AC unit turned on. However, it also alerts me that the AC unit turned off within 15 seconds after start. Which is false. It looks like it sees the start of 3200 watts as an on event. But when the AC unit is up to speed 3000 watts it gives me the wrong off signal. I can clearly see the unit was running for 10 minutes.

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@rverwij , you might want to offer a zoomed-in version of the on and off. From this screenshot, we can’t see if the off transition was tagged with a value or what that value was. It would also be interesting to see if there is a negative tag immediately following the on spike, on the downside of the spike.

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Will the following images show more info? The AC unit was running for 10 minutes this cycle. It is hard to get the AC bubble captured because you get maybe 10 seconds of AC bubble view before it changes to “Other”.


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@rverwij, don’t worry about the bubbles. But try to zoom in on the “real” (what you think to be) off transition. I’m speculating that there is not a clean matching single 3kW tagged drop.

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As close as a time frame as I can. This time it was flagged as 10 seconds on.
On was more than 5000 watts, the spike above the solar production. Off was 2300 watts at the now point.

@rverwij , sorry to keep asking, but that’s a screenshot from the web app which doesn’t do the power tagging. Hoping to see what the tagging shows for the “real” off transition that you captured in this screenshot. But tagging only happens in the phone / tablet app. I keep focusing on this because the tagging is a reasonable proxy for what Sense is actually “seeing” vs. what you see. It’s helpful to have Sense’s filter / blinders on when trying to understand what it is doing.

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To: @rverwij
See my response to another SENSE user:

Your A/C compressor run/start capacitor may be failing or you need to add a ‘hard-start kit’.

You will need several very detailed close-up views of your SENSE power graph when the A/C unit starts. @kevin1 is correct. You don’t need to post any ‘bubble’ pictures. If you look at my power graphs from my A/C, you will see two very distinct large spikes. The first spike is the A/C compressor starting with another large spike when the compressor cooling fan starts. As the compressor builds pressure in the freon, the wattage increases.

Use the “Search” feature on the SENSE Discourse forum posts for entries with “HVAC”, “AC” and dcdyer. You will see numerous past posts on this subject.

Maybe someone has posted a similar issue to your problem.
Good Luck!

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Same result 2164 is on with a bubble 5 seconds later off taged as other. I don’t understand why you guys don’t care about the bubbles. For me it is a switch, Yes on the meter I can see the AC was on for 10 minutes but sense does not count that appliance as being running if it does not have a bubble. AC running today 20 seconds “other” running for more than an hour.


@rverwij , we’re asking you to look past the bubbles and focus only on the primary measured data in Power Meter, because that is the starting point for all the analysis Sense does. If Sense is “missing” a transition, there’s a good chance that it’s detection of a device, like your AC, is going to be flawed.

We’re asking you to look at the trailing off edge in the Power Meter to see if there is a negative (off) tag. You can see in my example above that the off edge for my dryer is NOT tagged - that’s because I used the off button instead of letting the cycle end (I would usually see a negative gray taggged number for a normal cycle). The lack of a tag, indicates a potential detection issue.

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Would you please post the manufacturer and model number of the A/C compressor that you have installed? Or a picture of the serial tag? That would give forum users more information to help understand what is happening with the SENSE power graph. Thanks