Our heat pump spent 103 minutes defrosting today, with two more hours to go. Not ideal, but such days are rare. It's foggy outside, with temperatures around freezing.
Heat pump defrosting today
Our Mitsubishi Ecodan heat pump’s COP vs outside temperature
Our Mitsubishi Ecodan heat pump’s COP vs outside temperature:
Ecodan FTC6 firmware from 18.01 to 20.01
Updated our Ecodan FTC6 firmware from 18.01 to 20.01, using these instructions https://drive.google.com/drive/folders/18RT9mcwQj4Ro-d09x-T1mGcMWAl2tR2e Can’t notice significant difference so far.
Heat pump annual maintenance done
Heat pump annual maintenance done, “before” and “after” pump flow rate pictured below. I assume this affected performance significantly. Lesson learned 🙂
Logic level converter between our Ecodan ASHP UART port
Adding (finally) a logic level converter between our Ecodan ASHP UART port and the ESP32 interface to Home Assistant. Don’t ask why I don’t have it in place to begin with…
DEV.BG tech talk: Intelligent Synergy: Heat Pump, PV & Home Assistant
My DEV.BG tech talk on making the heat pump, the PV system and Home Assistant work together – slides and video, in Bulgarian.
Checking the noise level on our Mitsubishi ASHP outdoor unit
Checking the noise level on our Mitsubishi ASHP outdoor unit
Heat pump’s been battling outdoor temps up to 32-36°C
In recent days, our heat pump's been battling outdoor temps up to 32-36°C in cooling mode. With an EER (think of it as cooling's COP) of 3.81, it's an efficiency superstar – and all this is running purely on solar power
Heat pump at home
Prepping for the installation of a new heat pump at home in the next week or so, but not exactly thrilled about the imminent entropy surge So it begins.. The external unit and the internal hydro box are now mounted and the refrigerant lines are pressurized with Nitrogen for a 24h leak test Progress on…
Our DYI air-to-water heat pump
Our DYI air-to-water heat pump has officially reached the end of its 13-year service life, conveniently at the conclusion of this heating season. We're grateful for the reliable warmth it provided and look forward to replacing it with a new system during the summer months.
Domestic hot water for free
Domestic hot water nearly for free – my hacked Daikin air-to-water heat pump captures heat in both heating and cooling modes.
Re-vamping my Daikin Internet Air-conditioner controller
A new IR blaster shield for the uIoT gateway – SD slot, FTDI pinout, TMP36 sensor, and a re-vamped Daikin Internet AC controller.
Monitoring of my heat pump performance
Instrumenting my home-made Daikin heat pump hack with sensors – constant logging to prove whether the conversion is actually efficient.
Hacking Daikin split type air conditioner into air-to-water type heat pump
How I converted a Daikin split air conditioner into an air-to-water heat pump for heating, cooling and hot domestic water at my house.
Custom defrost algorithm for Daikin heat pump
My Daikin heat pump defrosts on a dumb 45-minute timer, so I built a custom defrost algorithm that only runs when actually needed.
Control Daikin air conditioner over the Internet
Adding Internet remote control to my Daikin FTX71GV/RX71GV based heat pump – house heating and cooling from anywhere.