Name: Main PWB1 Controller Card
Part Number: 718705
Included Components:

• Main PWB1 control board

• Pre-configured cables for:

  • Inverter PCB connection

  • Capacitor module connection

Purpose:
Acts as the central control hub of the F2040 16kW outdoor unit, responsible for real-time monitoring, decision-making, and control signal distribution across the system.

✅ System Compatibility

• Specifically compatible with:
  Nibe F2040 – 16kW model only

This controller is not cross-compatible with other capacities (e.g., 6kW, 8kW, 12kW), as each model requires firmware and hardware tailored to its inverter and sensor configuration.

🔧 Key Functional Roles

🎛️ System Coordination

• Controls the operation of:

  • Inverter compressor

  • Fan motor

  • Sensors (temperature, pressure, ambient)

  • System communication to SMO/VVM modules

📶 Signal Distribution

• Manages real-time control commands and feedback loops between system components using integrated firmware logic and pre-mapped cable connections.

⚙️ Energy Optimization

• Adjusts inverter output and fan operation dynamically based on system demand, improving seasonal efficiency and reducing wear.

⚠️ Symptoms of Faulty PWB1 Controller

You may require this replacement if your system exhibits:

• Communication loss with inverter or fan controller

• Erroneous sensor readings (e.g., incorrect temperatures, fluctuating data)

• Fan or compressor failure to start despite system demand

• Frequent lockouts or alarms without apparent hardware issues

🛠️ Installation & Integration

📦 Included:

• PWB1 board

• All necessary cables pre-labelled and sized for direct fit