Fault Codes / Mitsubishi Electric / 5101
City Multi — Thermistor fault — return air (TH21).
Mitsubishi Electric 5101: Thermistor fault — return air (TH21). This fault usually isn't an immediate stop, but should be checked soon.
Source: Mitsubishi Electric City Multi Fault Code List (offiziell, 2024-10)
Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.
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