Fault Codes / Lennox / EC

Lennox EC

Critical

Mini-Split MWM/MPA (Inneneinheit) — Low refrigerant error.

Lennox EC: Low refrigerant error. This fault typically halts operation and needs immediate attention.

Possible causes

Refrigerant leak in the system.

Check steps

Perform a leak test, repair the leak, restore the charge per manufacturer specification.

Affected parts

Kältemittel

Safety note

Follow F-Gas rules.

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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