Fault Codes / Mitsubishi Electric / FC

Mitsubishi Electric FC

High

SUY-KA50,60,80,100VA / SUY-ZM50VA / SUY-M60,80,100VA — Outdoor control system fault

Mitsubishi Electric FC: Outdoor control system fault This fault noticeably affects operation.

Possible causes

Inverter P.C. board defective
Firmware fault or memory error on the control board

Check steps

Power cycle the unit and re-check the error
If the fault persists, replace the inverter P.C. board

Affected parts

Inverter PCB

Safety note

High voltage inside the inverter — disconnect power and wait for capacitor discharge before servicing.

Source: Mitsubishi Electric resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Mitsubishi Electric Mr. SLIM Outdoor Unit (SUY-KA50,60,80,100VA / SUY-ZM50VA / SUY-M60,80,100VA) self-diagnosis table, rev. 20241024, page 5, No. 3, Check code FC: Symptom "Outdoor unit does not operate", Description "Outdoor control system" — Remedy: "Replace inverter P.C. board." (LED indication: 3-time flash /…

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

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