Alarm Z1 5506 - Compressor does not start

What does 5506 mean?

This alarm indicates that the Heat Pump's compressor did not start within 2 minutes after receiving a signal to do so. This could be due to a temporary malfunction or an internal inverter issue.

• Temporary malfunction in the inverter.
• Internal error in the inverter.

Click steps to track your progress.

1. 1

   Turn off the power to the Heat Pump at your main electrical breaker.

2. 2

   Wait for at least 30 seconds, then turn the power back on.

3. 3

   If the alarm persists, contact a qualified Bosch Heat Pump installer or service technician.