Fault Codes / Bosch / A01 (5452)

Bosch A01 (5452)

Critical

Compress — Internal fault in inverter.

Bosch A01 (5452): Internal fault in inverter. This fault typically halts operation and needs immediate attention.

Possible causes

Inverter defective.

Check steps

Power off: check inverter, replace if needed.

Affected parts

Inverter

Safety note

High voltage! Let capacitors discharge.

Source: Bosch/IVT/Buderus Compress Wärmepumpe Alarm-Tabelle (lvisawo.fi/jseducation.se resmi servis kılavuzu aynası) — Confirmed via direct PDF read p.21: code 5452, Customer, 'Warning Z1 Internal compressor control system fault', 'Alarm for internal fault in inverter', cause/action 'Defective inverter / Replace inver

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

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