Key symbol on display — Service or special mode message

What does Key symbol mean?

The display shows a key symbol, indicating either a service message requiring attention or that the unit is operating in a special mode. This is an informational or maintenance message, not necessarily a fault.

• Scheduled maintenance reminder or alert.
• Activation of a special operating mode (e.g., test mode or a specific program).
• Internal system status requiring a check or adjustment.

Click steps to track your progress.

1. 1

   Check if the heat pump is intentionally in a special operating mode or if recent settings changes were made.

2. 2

   Note down any specific message displayed alongside the key symbol on the screen.

3. 3

   Contact your heating technician and provide them with the displayed message for assistance or clarification.