Fault Codes / Bosch / A01 (5507)

Bosch A01 (5507)

High

Compress — Z1 MR1 high pressure warning.

Bosch A01 (5507): Z1 MR1 high pressure warning. This fault noticeably affects operation.

Possible causes

High pressure / poor connection of switch MR1.

Check steps

Check high pressure & heat dissipation.
Check pressure switch MR1 & connection.

Affected parts

Druckschalter MR1

Safety note

High-pressure side — hot & pressurized. 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.21-22: code 5507, Installer, 'Warning Z1 MR1 High pressure warn.', circuit for high pressure guard MR1 broken more than 3 seconds, compressor stops.

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

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