Mitsubishi Electric EE

High

PLY-ZM/PLY-M/PEY-M/PCY-M serisi — Combination error between indoor and outdoor unit (mismatched or incompatible pairing)

Mitsubishi Electric EE: Combination error between indoor and outdoor unit (mismatched or incompatible pairing) This fault noticeably affects operation.

Possible causes

Indoor and outdoor unit are not designed for the same series/refrigerant
Wrong indoor unit connected during installation

Check steps

Check indoor and outdoor unit model names for compatibility
If mismatched, install a compatible unit combination

Affected parts

Indoor unit
Outdoor unit

Safety note

Disconnect power supply before inspecting the units.

Source: Mitsubishi Electric resmi servis kilavuzu (bagimsiz cift-dogrulandi) — Mitsubishi Electric Mr. SLIM Indoor Unit - Malfunction-diagnosis method at maintenance service, rev. 20241024, applicable to PLY-ZM50EA / PLY-M60,80,100,125EA / PEY-M50,60,80,100,125JAL / PCY-M125KAL, page 3 (table "[Output pattern A] Errors detected by indoor unit"): "EE | Combination error between indoor and outdo…

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

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