Name: PWB 2 Inverter PCB
Part Number: 518420
Model Code: PCA505A194WB
Type: Inverter Control Board
Application: Critical for managing the inverter’s power modulation and communication with the system’s main controller.

System Compatibility

• Designed specifically for:
  Nibe F2040 – 12kW model

This board is not interchangeable with other F2040 capacities (e.g. 6, 8, or 16kW) due to tailored firmware, inverter logic, and power handling specific to the 12kW unit.

Key Functions

• Inverter Management:
  Controls compressor modulation, ensuring efficient operation based on heating demand.

• Communication Role:
  Interfaces with the main controller (PWB1) and sensor network to coordinate compressor behavior.

• Performance Optimization:
  Helps maintain stable system temperatures, minimize cycling, and enhance seasonal efficiency (SCOP).

• Energy Efficiency:
  Fine-tuned to balance power input and heat output for optimal energy usage, especially under variable load conditions.

Features and Installation

Features:

• Durable Construction: Designed to withstand the electrical and thermal stress of continuous inverter operation.

• Precision Control: Supports variable-speed operation to meet real-time heating demands.

• Built-in Safeguards: May include overvoltage protection, temperature sensing, and internal diagnostics.

Installation Notes:

• Supplied ready for direct replacement

• Installation should be done with full system power isolated

• Connections to:

  • Compressor drive

  • Power supply

  • Control signal harness from PWB1

• May require system commissioning or reset post-installation