Fault Codes / Lennox / P7

Lennox P7

High

Mini-Split MWM/MPA (Außeneinheit) — IPM module temperature sensor malfunction.

Lennox P7: IPM module temperature sensor malfunction. This fault noticeably affects operation.

Possible causes

IPM temperature sensor faulty or connection loose.

Check steps

Check sensor connection at the IPM; replace IPM if it persists.

Affected parts

IPM-Modul

Safety note

Discharge capacitors, isolate power.

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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