5527 - Bosch Heat Pump Z1 too much refrigerant alarm

What does 5527 mean?

This alarm indicates that there is too much refrigerant in Bosch Heat Pump zone 1. It triggers if sensor PH1 is more than 5°C higher than TC3, and undercooling is greater than the set point, with both conditions met for longer than 5 minutes during hot water production.

• The Heat Pump system was overfilled with refrigerant during installation or servicing.

Click steps to track your progress.

1. 1

   This is a critical issue that requires professional attention. Do not attempt to fix this yourself.

2. 2

   Immediately contact a qualified Heat Pump technician to assess and correct the refrigerant level in the system.

3. 3

   Avoid operating the Heat Pump until it has been inspected and serviced by a professional.