Fault Codes / Mitsubishi Heavy / E31
KX / FD — E31 = duplicate indoor unit address (U00–U47) or outdoor unit address setting error — NOT a generic 'outdoor unit control fault (U47)'; U47 is just the upper bound of the address range.
Mitsubishi Heavy E31: E31 = duplicate indoor unit address (U00–U47) or outdoor unit address setting error — NOT a generic 'outdoor unit control fault (U47)'; U47 is just the upper bound of the address range. This fault noticeably affects operation.
Source: Mitsubishi Heavy resmi servis kılavuzu — DÜZELTİLDİ: Mitsubishi Heavy Industries "Error Codes – R410A Systems" (3d Cooling PDF, masterxoloda.ru mirror; independently cross-checked against idealairconditioningservice.com.au/support/Mitsubishi-R410A-Systems-Error-Codes.pdf, identical text), row E31: Indoor Red LED "Stays Off", Green…
Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.
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