Fault Codes / Mitsubishi Electric / 5301

City Multi — Inverter current sensor (ACCT) fault / open IPM.

Possible causes

• ACCT connector (CNCT2) loose / wiring.
• INV board / compressor connection faulty.

Check steps

• Check CNCT2 & output wiring.
• Check inverter/compressor; replace INV board if needed.

Affected parts

• INV-Board
• ACCT-Sensor

Safety note

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.

Related fault codes