How to connect Nefit Moduline 3000 heat pump with Reduxi controller
Add the Nefit Moduline 3000 thermostat to the Reduxi Controller and read its values.
1 Prepare the connection
1.1 Technical documentation
Documents of the manufacturer:
- Nefit Bosch: Moduline 3000 – Instructions on the manufacturer web page (Dutch)
1.2 Required equipment
These components connect the Reduxi Controller to the device:
- Reduxi Controller
- Reduxi Converter EMS-Bus to RS485
- RS485 cable
- Laptop or tablet with internet access to configure the device in Reduxi
2 Connect the device to the Reduxi Controller
2.1 Overview of the connection
The connection from the device to the Reduxi Controller has three parts:
- The device communicates over the EMS-Bus.
- The Reduxi Converter converts the EMS-Bus to RS485.
- The RS485 line goes to the Reduxi Controller. For cabling and the connection diagram see Wiring, cable types and connection diagram.
3 Log in to the Reduxi web interface
You can open the Reduxi web interface in two ways:
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Screenshot of three Reduxi mobile app screens side by side, with cyan boxes and number badges 2 to 4. Left screen (dashboard, dark theme): menu icon at top left marked with a box and badge 2; 'reduxi' logo; tabs 'Real time data' (active) and 'Statistics'; price 5.79 € and temperature 3.2 °C; energy flow diagram with a house in the centre (-1.25 kW) and icons with values 69.0 W, 1.3 kW, 1.1 kW (red ring), -165.0 W with 97 % (red ring) and 0.0 W values at the bottom; tabs 'Power' and 'Energy'; bottom navigation: Dashboard, Diagnostics, Device control, Settings. Middle screen (side menu): 'reduxi' logo, 'Number of locations: 1233', heading 'Reduxi device management', entries '+ Add Reduxi location' and 'Reduxi devices' (marked with a box and badge 3), then 'My profile' and 'About app'. Right screen (device page): Back; picture of a black Reduxi controller with two Ethernet ports; status 'Connected'; card 'Update available': 'New update is available for your Reduxi device.' with button 'Download and install update'; card 'Connect to configurator': 'Tunnel connection enables remote access to your Reduxi configurator, without need to be connected to the same local network.' with button 'Activate tunnel connection' (marked with a box and badge 4); card 'Unit details' with field 'Unit ID'.
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Screenshot made of two parts side by side. Left part: Reduxi mobile app screen on a dark background. Top: Back button; picture of a black Reduxi controller with two Ethernet ports and a terminal block; status 'Connected' with a Wi-Fi icon. Card 'Update available': 'New update is available for your Reduxi device.' with button 'Download and install update'. Card 'Connect to configurator' with a key icon: 'Tunnel connection enables remote access to your Reduxi configurator, without need to be connected to the same local network.' and button 'Open configurator', marked with a cyan box and number badge 5. Below: card 'Unit details' with a field 'Unit ID' (value not visible). Right part: Reduxi Configurator opened in a browser, marked with a cyan frame and number badge 6. Header: back arrow, 'Tunnel connection', reload icon. Left sidebar with icons (lightning, chip, lightning bolt, bar chart, gear). Page 'Home' with a green link icon. Green notice: 'New patch available. Click here to apply.' with a close X. Time 09:12:56. Energy flow diagram with a house in the centre (1.700 kW) and icons for grid (0.000 kW), solar (1.700 kW), battery (green, 0.000 kW and 0.800 kW), a device at left (0.900 kW), electric vehicle and a charger or device at bottom. Label 'Energy manager' at the bottom.
http://reduxi.local. You can find the controller's IP address in your router's device list or in the Reduxi app under Reduxi devices.admin · Password: admin (factory default)Text description of this image
Screenshot of the Reduxi Configurator login page in a Chrome browser window. The address bar shows 'Not secure' and 'reduxi.local'; the address bar is marked with a cyan box and an enlarged copy of it (cyan box, text 'Not secure reduxi.local') is shown at the left, connected by a cyan line. Page background: light grey line drawing of a house with solar panels (green), a wall box, an inverter, a car and a charger. Top left: 'reduxi configurator' logo. Login box in the centre with title 'Login', a language selector (English flag, 'English'), a username field and a password field, and a dark 'Login' button.
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Screenshot of the Reduxi Configurator web interface after login, light theme. Top left: 'reduxi configurator' logo. Header bar: 'Home' at left, green 'Connected' status at top right. Left sidebar: expanded section 'Devices' with a list of entries, then collapsed sections 'Manager' and 'Configuration' and 'Settings'. Main area: energy flow diagram. House in the centre with ring, value 24.20 kW. Grid icon at top left, 24.20 kW (red dot on its line). Solar icon at top right, value '-'. Left icon (battery or device), 6.700 kW (green dot on its line). Right icons (battery storage and a device), values '-'. EV charger icon at bottom left, 31.00 kW. A further device icon at bottom right. Label 'Energy manager' below the house.
4 Add the device to Reduxi
Use these steps to add a new device or to edit an existing one.
4.1 Basic settings
Log in locally to the Reduxi Configurator on the controller (see Point 3) and click Add device.
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Screenshot of the Reduxi Configurator device list. Header: reduxi logo with the text Configurator on a light grey background. Section heading Devices with a minus icon. Device entries in order: Elwe 2 (heat pump icon); Fronius SYMO (sun icon); Schrack NA96 (power pylon icon); Sunways Hybrid Inverter (battery with sun icon); Thor (heat pump icon). Below the last entry is an Add device button with a plus icon, marked with a cyan highlight box. The rest of the image to the right is empty white.
Enter the basic settings of the device:
- Device type:
HVAC - Type: the entry
EMS Bus - Thermostat - RC300/RC310/Moduline 3000/1010H/CW400/Sense II/HPfrom the List of supported devices - Name: a name of your choice, for example Nefit Moduline 3000
Then click Next.
4.2 Communication settings
Select the communication channel (the RS485 line to the converter) and enter the device configuration:
| Parameter | Value |
|---|---|
| Modbus unit ID | Normally 1
|
Then enter and select the advanced settings.
4.3 Test communication
Click Test communication at the bottom of the wizard. It reads the Nefit Moduline 3000 once and saves nothing. If the test succeeds, click Done: only Done creates the device.
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Screenshot of the bottom button bar of a Reduxi Configurator page. Left: button 'Back'. Right: button 'Test communication' (marked with a cyan box) and dark button 'Done'.
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Screenshot of the Reduxi Configurator page 'Communication channel and device configuration'. Connection *: TCP/IP (dropdown). IP *: 192.168.50.243, with button 'Scan for IP'. Port *: 502, with button 'Test port'. Modbus unit ID *: 1. Buttons at the bottom: Back (left), Test communication and Done (right). The Done button is marked with a cyan box.
5 Check the readings
5.1 Last measurements
After communication is established, check the values under Devices – Nefit Moduline 3000 in the Reduxi Configurator as an additional test.
5.2 Control by Reduxi
The List of supported devices shows this device with the integration level Read. Reduxi reads the values. Strategy commands do not control the device.
Reduxi strategies are described in Strategies for Reduxi controller.
✓ Summary
Preparation (Point 1): Open the manufacturer documents. Get the Reduxi Controller, the Reduxi Converter EMS-Bus to RS485 and an RS485 cable.
Nefit Moduline 3000 (Point 2): Connect the device over the EMS-Bus and the converter to the RS485 line of the Reduxi Controller.
Add to Reduxi (Points 3–4): Log in to the Reduxi web interface. Add the device with type HVAC, set Modbus unit ID 1 and test the communication.
Go live (Point 5): Check the last measurements. The device is read only.
→ Common issues
| Issue | Solution |
|---|---|
| No data from the device | Check the RS485 A/B polarity, the cable type and the bus termination (see Wiring, cable types and connection diagram). Check the Modbus unit ID (normally 1) (see Point 4). |
| Device type is not in the list | Update the Reduxi Controller to the latest software. Then select the entry EMS Bus - Thermostat - RC300/RC310/Moduline 3000/1010H/CW400/Sense II/HP (see Point 4). |
| Strategy does not control the device | The device is read only in Reduxi (see Point 5). |
| Open configurator does not open or stays empty | The tunnel is not active yet. Wait about 30 seconds and check that the controller is online. |
Login with admin is rejected |
The password was changed during installation. Ask the installer. The Reduxi account password does not work here. |
reduxi.local does not load |
Your device is not in the same network as the controller. Use the IP address or the tunnel connection. |
| Communication test fails, device shows offline | Check reachability, IP address / port / unit ID, and that the protocol is enabled on the device. |