Fault Codes / Bosch / A11 (1010)

Bosch A11 (1010)

High

Compress — No communication via EMS BUS.

Bosch A11 (1010): No communication via EMS BUS. This fault noticeably affects operation.

Possible causes

EMS connection broken/disturbed.
Accessory (room control/mixer) wrongly connected.

Check steps

Check EMS cabling display ↔ installer board.
Check all EMS accessory connections.

Affected parts

EMS-Leitung

Safety note

Low voltage — work carefully.

Source: Bosch resmi servis kılavuzu — Alarm List A/W Split (8754) p.1: code 1010/A11 'No communication via EMS BUS connection' — 'The local device hasn't received its EMS token from the EMS bus master for 2 minutes.' Exact match.

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

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