Alarm Z1 MR1 High pressure alarm — Repeated high pressure warning

What does 5508 mean?

This alarm is triggered if the high pressure warning code 5507 occurs two times within three hours. It indicates a recurring or persistent issue with the high pressure guard MR1 circuit.

• 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 alarm persists, contact a qualified technician to inspect or replace the pressure guard.