Name: Internal Communication Cable
Nibe Part Number: 218559
Type: Signal/Control Interconnect
Location:
📍 Internally mounted inside the F2040 outdoor unit – typically routed between circuit boards (e.g., main board to relay/control board).

This cable is essential for enabling internal communication between electronic control boards within the unit.

Compatible Nibe Units

F-Series Air Source Heat Pumps

• Nibe F2040 6kW

• Nibe F2040 8kW

• Nibe F2050 10kW

These are common residential air source heat pump models, and the internal comms cable ensures coordinated operation between internal components like the inverter, compressor controller, and control PCB.

Technical Notes

• Purpose:
  Designed for signal transmission, not for power. It facilitates data transfer between internal circuit boards, often part of the CAN-bus or proprietary Nibe control system.

• Symptoms of Failure:
  If this cable is damaged or disconnected, common signs include:

  • Loss of display/controller function

  • Error codes related to board communication - comms error 

  • Unit failing to start or register control signals