Alarm Z1 Air in the system — Air detected in the system

What does 5594 / H01 mean?

This alarm indicates that the temperature of sensor TC1 has increased too rapidly (> 0.8 K/s) under normal working conditions. It's mainly for units with an integrated 9 kW electrical heater and is blocked in software v1.09 when TC0>TC1.

• The flow is blocked by a valve.
• The flow is blocked due to a bad electrical connection to the circulation pump.
• Air in the appliance or heating system.

Click steps to track your progress.

1. 1

   Wait two minutes for the appliance to cool down.

2. 2

   Check for any closed valves that might be blocking the flow.

3. 3

   Ensure the circulation pump is running and check its electrical connection.

4. 4

   If no blockages are found, redo the filling and venting procedure to remove air from the appliance and heating system.