Fault Codes / Mitsubishi Electric / E4

Mr. Slim — Remote controller signal receiving error.

Possible causes

• No signal received from indoor.
• RC line/PCB faulty.

Check steps

• Check RC wiring & power.
• Replace indoor PCB/RC if faulty.

Affected parts

• Fernbedienung
• Innen-PCB

Safety note

Source: Mitsubishi Electric resmi servis kılavuzu — MrSlimerrorCode.pdf p.3: 'E4, E5 Communication error between wired remote controller and indoor unit'; PUY doc p.7 confirms similar receiving/transmitting error grouping.

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

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