Daikin Altherma 3 Heatpumps
Supported Devices
| Device Type | API | Modbus TCP (Ethernet) | RS485 | Relays |
|---|---|---|---|---|
| EHV* | ❌ | ❌ | ❌ | ✅ |
| ETV* |
Warning
Warning
Control is only possible using Boost or Block. Specific Wattage control is not supported!
| Device Type | API | Modbus TCP (Ethernet) | RS485 | Relays |
|---|---|---|---|---|
| EHV* | ❌ | ❌ | ❌ | ✅ |
| ETV* |
Control is only possible using Boost or Block. Specific Wattage control is not supported!
The communication between the Sofar EMS and the Daikin heatpump operates via Relays. This guide follows the installation of the installer reference guide.
Turn off the heat pump completely by disconnecting the power supply to the heat pump.
Follow the steps as described in section 7.2.4 - To open the indoor unit of the installers reference guide:
Locate terminal block X5M inside the unit. On this terminal block, you will find:
S10S (12V)S11S (12V)For the connection between the Sofar EMS and the Daikin Altherma heat pump wire with 0.5mm2 cross section is required. Wire the heat pump to the controller as follows:
| Terminal X5M | Controller |
|---|---|
| 9 | R1 NO |
| 10 | R1 COM |
| 5 | R2 NO |
| 6 | R2 COM |
In the controller interface, navigate to: Devices > Start device wizard > Heat Pump > Generic > Relays > Relay-controlled heat pump > My device is fully connected
Then enter the following data:
Continue through the wizard to complete the setup.
You may modify the device settings afterward as desired, but the default values are sufficient in most cases.
Once the wiring is complete, you may power the heat pump back on.
Using the heat pump's MMI, enter installer mode and set the following parameters:
| Breadcrumb | Value | Name |
|---|---|---|
| 9.8.4 | 3 = Smart Grid | Benefit kWh power supply |
| 9.8.5 | set as desired | Smart Grid operation mode |
| 9.8.6 | set as desired | Allow electrical heaters |
| 9.8.7 | set as desired | Enable room buffering |
| 9.8.8 | set as desired | Limit setting kW |
💡 Tip: To turn on the breadcrumbs press the (i) button on the MMI while on the homescreen.
After completing these steps, the heat pump will be properly connected, registered in the software, and configured for use via relay control.