Before you start

Before you begin, make sure:

You have the MX 400 gateway
The heat pump is physically installed and powered on
All assets (heat pump, MX 400 gateway) are updated to the latest software version

Step-by-Step Instructions

1. Connect the heat pump to the network

Connect an Ethernet cable to the LAN port on the MX 400 gateway
Verify the connection is established by checking the LED on the gateway or in the Buderus app

For network infrastructure requirements and troubleshooting, see Infrastructure requirements for the gateway.

2. Discover the heat pump in the commissioning wizard

The heat pump is now ready for the commissioning wizard. The gateway will scan the network to find available devices, which may take a few minutes. Once complete, the heat pump will appear on the results page.

Indicate whether the heat pump's electricity is billed on a dedicated heatpump tariff or as part of household consumption. Heat pumps on a dedicated tariff are excluded from self-sufficiency optimization.

3. Connect the heat pump to the gateway

After the scan completes and the heat pump is discovered, click Next in the commissioning wizard to proceed to the EEBUS connection screen.

On this screen, click Pair to initiate the EEBUS pairing process
Accept the pairing on the heat pump
1. Navigate to
  System overview → More → System → Settings → EEBUS → Commissioning
2. Click Search EEBUS devices and wait for the scan to finish
3. Select the gateway and confirm the device details
4. Wait for coupling to finish and verify the connection

FAQ

Why isn't the heat pump appearing in the commissioning wizard?

Check that the MX 400 gateway is connected via Ethernet and that EEBUS commissioning is complete. Verify that you've selected the gateway during the EEBUS device scan. Restart the gateway and wait for the network scan to complete.

How do I update the firmware of the heat pump?

You can perform the update through the Buderus app or the MX 400 gateway web portal.
For detailed update instructions, refer to the official Buderus documentation.

Where is the EEBUS menu on the MX 400?

Navigate to System overview → More → System → Settings → EEBUS on the MX 400 gateway. This menu shows the EEBUS connection status and lists all paired devices.

What does "Trust" mean in the EEBUS settings?

"Trust" is the authorization that permits the gateway to communicate with the heat pump via EEBUS. When you complete the pairing process in the commissioning wizard and accept on the heat pump side, the heat pump grants trust to the gateway. Without this authorization, the gateway cannot monitor or control the heat pump.