Nibe CPU v1.18 res 618643

CPU Module – (v1.18 RES) The NIBE CPU Module F1X-20/30 V1.20 RES (Part Number: 618643) is a replacement control circuit board (CPU card) used in older NIBE heat pump systems. Part Details Part Number: 618643 Description: CPU Module F1X-20/30 V1.20 RES (Reserve / Spare Part) Category: Electronic Control Unit / Main Board Common Compatibility: Found in various legacy NIBE Fighter and F-series ground source/exhaust air heat pumps (e.g., NIBE Fighter 1120, F1140, F1220, F1330 series). Key Information & Troubleshooting Topic Details Function Acts as the central processor for the heat pump, interpreting sensor data, managing heating cycles, and communicating with the display unit/relay cards. Software Version The v1.18 or v1.20 designation refers to the baseline firmware revision flashed to the chip on the board.