Name: Comms Card (Communication Interface Board)
Part Number: 718414
Function:
The communication card acts as a bridge between internal system components and the external controller or gateway. It enables the exchange of data across subsystems such as the inverter, main PCB, fan controller, and external management systems like SMO or VVM modules.

Compatible Nibe Units

F2040 Air Source Heat Pumps

• Nibe F2040 – 6kW

• Nibe F2040 – 8kW

• Nibe F2040 – 12kW

• Nibe F2040 – 16kW

This wide compatibility makes the 718414 Comms Card a standard component across the full F2040 product range, allowing for unified communication protocols.

Key Functions

• Data Link Management:
  Maintains communication integrity between various control boards (e.g., main control, fan, inverter)

• External Controller Interface:
  Supports connections to VVM/SMO controllers for system coordination

• Error Handling:
  Helps diagnose faults by relaying messages between modules and displaying alarms

• Signal Synchronization:
  Ensures all internal modules receive and interpret control commands accurately

Symptoms of Fault or Failure

You may consider replacing this card if the system displays:

• Communication Loss Alarms (e.g. "Comms Lost to Unit/Module")

• No response from the inverter or controller

• Blank display or frozen control panel

• Partial startup or inconsistent operation

Installation Notes

• Location:
  Internally located within the electrical control area of the F2040 outdoor unit.

• Replacement Tip:
  Match connector ports and cabling one-to-one; use anti-static handling precautions.

• Commissioning:
  A system power cycle or soft reset may be required after replacement.