Fault Codes / Mitsubishi Heavy / E45

KX / FD — Inverter PCB / outdoor PCB communication error.

Possible causes

• Internal wiring / PCB faulty.

Check steps

• Power off: reseat INV/outdoor PCB connectors.

Affected parts

• Inverter-PCB
• Außen-PCB

Safety note

Source: Mitsubishi Heavy resmi servis kılavuzu — Mitsubishi Heavy KX-T-378 p.175: 'E45 E45-1,2 Communication error between inverter PCB and outdoor unit control PCB... When the communication between inverter PCB and control PCB is not established.' Matches app's 'Inverter-PCB / Außen-PCB Kommunikationsfehler.'

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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