Hi Jonathan,
No, it went up at 17h20 (22/05) and down at 16h20 (26/05).
Temperature is not really different the days before and after the high values (13-21 °C) so no correlation I think.
The gap in between is a general power outage, not related to the heatpump.
The spike at 25/05 is me trying to get the standby power back to 22W by putting the heating on for a minute. (which didn’t worked that day, but the day after it went down without doing anything).
Sorry to be late to the party,
I had a similar issue with the EDLA09DA3V3 previously. In our case there was a high pitch noise outside and it turned out that a relay hit stuck when the heatpump was switched off by the breaker by an engineer.
Issue was corrected by turning the heating on and then off again allowing the relay to return to its resting state.
Just a thought.
Here is a screenshot from the last 30ish hours. I can’t see a trend to trigger the change, or a condition being met for tape heaters. I can’t hear a hum from anywhere when it’s using ~60w. I’m baffled by it.
Sorry, I can’t help you from that information alone. Daikin Altherma sub-optimal performance - #55 by Robert.Wall
Agreed @Robert.Wall , there isn’t much to go on at the moment!
@HydroSam I can’t recall if you have ESPAltherma, but if you do, beyond the standard metrics there are loads of others which might give you a clue. It’s happening enough that you wouldn’t have to turn them all on all of the time to get some data that might correlate.
Thanks for the replies @Robert.Wall and @John. Appreciate it’s not much to go on.
I don’t have ESPAltherma setup, it seems like that’s what I’d need to diagnose what’s going on.
To try and understand the cost implications I’ve just crunched this:
| Standby Usage | |
|---|---|
| Wh/day | |
| Typical day on Standby | 1050 |
| If 24w only in Standby | 576 |
| difference | 474 |
Apologies if the terminology isn’t correct. So if 0.5kWh per day is being “wasted”, then using my current electricity costs of <7p/kwh (Solar PV+battery) it’s costing me less than 4p. So I should probably not lose sleep over this. But is does make a massive difference to my SCOP outside of the heating season…
