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