Fault Codes / Bosch / A01 (5594)

Bosch A01 (5594)

High

Compress — Z1 air in the system.

Bosch A01 (5594): Z1 air in the system. This fault noticeably affects operation.

Possible causes

Air in heating/brine circuit (low flow).

Check steps

Bleed the system thoroughly.
Check flow & pump.

Affected parts

Umwälzpumpe

Safety note

Depressurize before working.

Source: Bosch/IVT/Buderus Compress Wärmepumpe Alarm-Tabelle (lvisawo.fi/jseducation.se resmi servis kılavuzu aynası) — Confirmed via direct PDF read p.24 (AWS Split doc): code 5594/H01, Customer, 'Alarm Z1 Air in the system', temperature of sensor TC1 increased too fast (>0.8K/s), action redo filling/venting to remove

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

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