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5524

Alarm Z1 5524 - Internal compressor driver error 3

Bosch · Compress 7000 Heat Pumps

What does 5524 mean?

This alarm is triggered if the 'Internal compressor driver warning 3' (code 5523) occurs repeatedly or for an extended period, indicating a persistent internal error in the Heat Pump's inverter.

Common Causes

  • Internal error in the inverter.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Note the alarm code 5524.

  2. 2

    Contact a qualified Bosch Heat Pump installer or service technician.

  3. 3

    The technician will diagnose the inverter and likely recommend a replacement.

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-A241010No communication via EMS BUS connection — Device not receiving EMS token1051No communication with external room temp. sensor module — Incorrect software setting for heating circuit 1
Source: Bosch Compress 7000 Heat Pumps
Open Manual (Page 27)Search more codes in this manual