Lennox CP

High

Mini-Split MWM/MPA (Inneneinheit) — Condensate switch (water level) alarm malfunction (M22A, M33A/B and MMDA units only).

Lennox CP: Condensate switch (water level) alarm malfunction (M22A, M33A/B and MMDA units only). This fault noticeably affects operation.

Possible causes

Condensate drain blocked or float switch faulty/miswired.

Check steps

Clean condensate drain, check float switch and wiring.

Affected parts

Kondensatschalter

Safety note

Isolate power before testing.

Source: Lennox Mini-Split Systems Service Manual — Indoor and Outdoor Unit Error Codes (Corp. 1816-L7, 2018), "Extended Reference Guide - Outdoor Unit Error Codes" §4 and "Indoor Unit Error Codes" §5

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

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