Fault Codes / Mitsubishi Electric / E9
Mr. Slim — Indoor/outdoor communication error (outdoor side).
Mitsubishi Electric E9: Indoor/outdoor communication error (outdoor side). This fault noticeably affects operation.
Source: Mitsubishi Electric resmi servis kılavuzu — MrSlimerrorCode.pdf p.4: 'E9 Indoor/outdoor unit communication error'.
Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.
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