Error 134 (E20) - Heat pump alarm summary

What does 134 mean?

The user interface displays '134: Heat pump alarm summary', also shown as E20. This is a general alarm indicating one or more underlying issues within the heat pump system. A manual reset is required.

• Multiple minor faults occurring simultaneously.
• A critical fault that triggers a summary alarm.
• Software or control system malfunction requiring a system overview.

Click steps to track your progress.

1. 1

   Press the 'Info' key on the display to view details, then press OK when 'yes' flashes to confirm the reset.

2. 2

   Turn off the main power supply to the heat pump for 30 seconds, then turn it back on.

3. 3

   Check the error history (Lines 6800-6818) in the control system for more specific fault codes.

4. 4

   Contact a qualified service technician to investigate the underlying causes of the summary alarm.