Warning Z1 MR1 High pressure warn. — High pressure guard circuit broken

What does 5507 mean?

The circuit for the high pressure guard MR1 is broken for more than 3 seconds. This causes the compressor to stop, indicating a potential issue with the pressure guard or its connections.

• Defective pressure guard, triggering too early.
• Break or poor connection in cabling between MR1 and inverter.

Click steps to track your progress.

1. 1

   Check the cabling and connections between the MR1 pressure guard and the inverter for any loose or broken wires.

2. 2

   Ensure that the high pressure guard is securely connected.

3. 3

   If the warning persists, contact a qualified technician to inspect or replace the pressure guard.