Mitsubishi Electric F5

Medium

PUY-P42, 48, 125VKA.TH / PUY-M125VKA-SG — Connector (63H/TRS) is open/disconnected

Mitsubishi Electric F5: Connector (63H/TRS) is open/disconnected This fault usually isn't an immediate stop, but should be checked soon.

Possible causes

Connector on the outdoor controller board is disconnected
Pressure switch (63H/TRS) faulty or wire broken

Check steps

Check that connector (63H/TRS) on the outdoor controller board is not disconnected
Check continuity of pressure switch (63H/TRS) with a tester

Affected parts

63H/TRS pressure switch
Outdoor controller board connector

Safety note

Disconnect power supply before working on the pressure switch; be aware of system pressure.

Source: Mitsubishi Electric resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Mitsubishi Electric Mr. SLIM Outdoor Unit fault code F5 (63H/TRS — Connector open / High-Pressure Switch circuit open). Confirmed across multiple independent secondary sources aggregating official Mitsubishi Mr. Slim P/K-series troubleshooting tables (e.g. removeandreplace.com Mitsubishi AC error code compilation: "F5…

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