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1010

No communication via EMS BUS connection — Device not receiving EMS token

Bosch · Compress 7000 Heat Pumps

What does 1010 mean?

The local device has not received its EMS token from the EMS bus master for a certain amount of time. This indicates a break, disruption, or interference on the EMS bus connection.

Common Causes

  • Break or disruption in the EMS connection.
  • Interference on the EMS bus, potentially due to contact with the chassis.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check that all accessories connected to the EMS bus (room control, mixing module, etc.) are properly connected.

  2. 2

    Inspect the EMS bus cable (GND) to ensure it is not in contact with the chassis, as this can cause interference.

  3. 3

    If a 3.5 mm tele female connector is attached to the BBT port, ensure it is insulated from the chassis.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

1001/A2xNo communication betw. system controller and remote control — Room sensor error A21-A241051No communication with external room temp. sensor module — Incorrect software setting for heating circuit 11052No communication with external room temp. sensor module — Incorrect software setting for heating circuit 2
Source: Bosch Compress 7000 Heat Pumps
Open Manual (Page 6)Search more codes in this manual