5-time blink 2.5 seconds OFF — High pressure protection

What does 5-time blink 2.5 seconds OFF mean?

The outdoor unit LED blinks 5 times with a 2.5-second pause. This indicates high pressure protection activated because the indoor coil thermistor exceeded 70°C in HEAT mode, or the defrost thermistor exceeded 70°C in COOL mode.

• Refrigerant circuit issue
• Incorrect refrigerant amount
• Closed stop valve

Click steps to track your progress.

1. 1

   Ensure the outdoor unit is not obstructed and has good airflow.

2. 2

   Check the stop valve to ensure it is fully open.

3. 3

   Turn off the unit at the circuit breaker, wait a few minutes, then restart.

4. 4

   If the error reoccurs, a qualified technician should check the refrigerant circuit and refrigerant amount.