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5354

Warning Z1 Overcurrent on the compressor — Inverter registers overcurrent

Bosch · Compress 7000 Heat Pumps

What does 5354 mean?

The inverter has detected an overcurrent condition (greater than 42 A DC for more than 20 microseconds) to the compressor. The warning automatically resets after 4 minutes if the condition is no longer present.

Common Causes

  • Broken or shorted cabling between the inverter and compressor.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the cabling between the inverter and the compressor for any visible damage or loose connections.

  2. 2

    Ensure all electrical connections are secure and properly seated.

  3. 3

    If the warning persists, contact a qualified technician to inspect the electrical integrity of the compressor and inverter.

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

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Source: Bosch Compress 7000 Heat Pumps
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