Name: CPU Control Card
Part Number: 518694
Version: V119 & V121
Function:
The V119/V121 CPU Card is the central processing and logic control board for the Nibe F2015 air source heat pump range. It governs core operations such as compressor modulation, temperature regulation, and communication with external controllers or user interfaces.

System Compatibility

• Fully compatible with:
  Nibe F2015 – all available kW variants (commonly 6, 8, 11 kW)

Note: This board version is purpose-built for F2015 models and may not be cross-compatible with other F-series units like F2025 or F2020 due to firmware and hardware interface differences.

Key Functions and Features

 System Management

• Controls heating demand response via temperature sensors

• Coordinates compressor operation for optimal performance

• Manages communication with connected indoor units or controllers (e.g., SMO modules)

Hardware Highlights

• Integrated microcontroller programmed for Nibe logic

• Includes input/output handling for:

  • Flow sensors

  • Outdoor/indoor temperature sensors

  • Immersion heaters (if installed)

• LED or diagnostic interface for service checks (model dependent)

 Efficiency Optimization

• Supports adaptive heating based on outdoor temperatures and usage patterns

• Minimizes compressor cycling to improve system longevity and energy performance

Installation Notes

 What’s Included:

• CPU board V119/V121

• Mounting points and standardized harness connectors