Fault Codes / Mitsubishi Electric / P4

Mr. Slim — Drain float switch / drain sensor fault.

Possible causes

• Float switch open / drain sensor faulty.
• Connector loose.

Check steps

• Check drain sensor resistance & connector.
• Check float switch & drain.

Affected parts

• Schwimmerschalter
• Drain-Sensor

Safety note

Source: Mitsubishi Electric resmi servis kılavuzu — MrSlimerrorCode.pdf p.3: 'P4 Float switch connector open'; p.10: 'Float switch(FS) connector open'; noted overlap with drain sensor (P4/P5 grouped in some tables) is accurate.

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

Related fault codes