Airwell b9

Low

VRF Engineering Manual — Indoor unit hot-keep protection active.

Airwell b9: Indoor unit hot-keep protection active. This fault is usually minor, but points to an underlying cause.

Possible causes

Heat exchanger too cold in heating mode — protection against cold air discharge active.

This is usually a normal startup protection; if persistent, check heat exchanger sensor.

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Source: Airwell VRF Series Air Conditioner Engineering Manual, "Fault And Protection Code List" p.301 (ManualsLib scan of official manual)

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