I have a multi unit 3 Ton system with 3 inside units. It is a heat pump (no heating strip, no defrost heat strip).
A few things I found was it…
It was very hard to detect or measure until I put it on a Dedicated Circuit.
It seems to consume more power in heat mode than cool. Not sure why. Winters are usually mild here. Summers, not so much.
Latest thing I discovered is its power consumption when “off”. I knew it used some power but was surprised to learn how much of a vampire it can be.
I recently had mild weather and turned off all the inside units for over 24Hrs. Below is snapshots of its usage. I knew of the low 7 watt but was surprised to find it “cycles” about every 30 minutes to a 60+ watt “cycle” for about 15 minutes. Why? I have no idea but found it interesting and figured I’d share the info.
@ron111157, really interesting data and assessment. I can add to the Community Device Library if you give me a little extra information…
Here’s the info required.
Make: Your make Model: Your model How identified: How it was identified (Sense Identification, Smart plug, Manual, DCM)
Additional Comments: Power Specs: Power specs or link to product information Operating Wattages: Various wattages at different stages of operating (i.e. “Standby”, “On”)
Make: Mitsubishi Mini-split Multi Unit. Model: Outdoor Unit MXZ-4C36na, Indoor unit X3 MSZ-GL12na-u1 How identified: DCM
Power Specs:Power Supply Voltage, Phase, Hertz 208 / 230V, 1-Phase, 60 Hz Recommended Fuse/Breaker Size A 25 MCA A 22.1 Operating Wattages: Constantly varies. Typical average 700-1200w. Total usage in Feb. was 346.8 kWh
Did some additional reading on here about Heat pump Mini-splits and it could be what they call a pre-heat control. It may be this.
