Fault Codes / Bosch / H01 (5448)

Bosch H01 (5448)

High

Compress — Expansion valve VR0 — deviation (opened 20% more).

Bosch H01 (5448): Expansion valve VR0 — deviation (opened 20% more). This fault noticeably affects operation.

Possible causes

EXV VR0 controlling out of range / charge.

Check steps

Check EXV VR0 & charge/superheat.

Affected parts

Expansionsventil VR0

Safety note

Follow F-Gas.

Source: Bosch/IVT/Buderus Compress Wärmepumpe Alarm-Tabelle (lvisawo.fi/jseducation.se resmi servis kılavuzu aynası) — Confirmed via direct PDF read p.20: code 5448, Installer, 'Alarm Z1 Lack of refrigerant', alarm after 20 minutes if EEV VR0 has opened 20% more than calculated value, cause 'too little refrigerant in

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

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