H64 — Refrigerant high pressure abnormality

What does H64 mean?

The system has detected an abnormally high pressure condition in the refrigerant circuit. This error triggers if the abnormality continues for 5 seconds.

• Outdoor high pressure sensor is defective.
• Outdoor high pressure sensor is disconnected.

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit at the main breaker and wait 30 seconds before turning it back on.

2. 2

   Inspect the connections to the outdoor high pressure sensor for any signs of damage or disconnection.

3. 3

   If the error persists, contact a qualified technician to diagnose the high pressure sensor or the overall refrigerant system.