Panasonic Aquarea H99

High

WH-Serie — Indoor heat exchanger freeze prevention.

Panasonic Aquarea H99: Indoor heat exchanger freeze prevention. This fault noticeably affects operation.

Possible causes

Cooling: low airflow / dirty filter.
Low refrigerant.

Check steps

Clean filter/coil, check flow.
Check charge.

Affected parts

Wärmetauscher
Kältemittel

Safety note

Follow F-Gas.

Source: Panasonic Aquarea resmi servis kılavuzu — Panasonic Aquarea WH-SDC09H3E8 Service Manual, Error Codes Table (ManualsLib p.159), consistent with generic Panasonic H99 'Indoor heat exchanger freeze prevention' description (ManualsLib CS-E9RKUAW p.96 analog) — matches app's 'Innen-Wärmetauscher Frostschutz aktiv'.

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

Look up in Enthalio →

Related fault codes

Water flow switch abnormality.H62 High pressure sensor abnormality.H64 Back-up heater OLP abnormality.H70 Indoor/outdoor communication abnormality.H90 Pressure switch activated.F12 Cooling high pressure overload protection.F95