Fault Codes / Mitsubishi Heavy / E1

KX / FD — Communication error indoor ↔ remote controller.

Possible causes

• Control line faulty/loose.
• Remote controller faulty.

Check steps

• Check control line & polarity.
• Replace/test remote controller.

Affected parts

• Fernbedienung
• Steuerleitung

Safety note

Source: Mitsubishi Heavy resmi servis kılavuzu — Mitsubishi Heavy Industries Air Conditioning Error Codes – R410A Systems (3D Distribution technical support doc, official MHI-sourced table, covers FD Split & KX4/KXR4 R410A series), p.1: E1 row lists 'Open Circuit or poor indoor/outdoor interconnecting wiring', 'In group control…

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

Related fault codes