F28 (19 LED flashes) - Loop of the station detect error

What does F28 mean?

The outdoor unit's LED1 flashes nineteen times, indicating an error in the 'loop of the station detect' system, which likely relates to refrigerant flow or pressure.

• Refrigerant circuit issues (e.g., blockage or leakage)
• Pressure sensor failure
• Faulty control board related to refrigerant detection
• Issues with the main PCB

Click steps to track your progress.

1. 1

   Turn off the AC unit at the main power supply and leave it off for at least 30 minutes.

2. 2

   Verify that nothing is physically blocking the outdoor unit's coils or fan.

3. 3

   Ensure the outdoor unit is clean and free of debris.

4. 4

   Restart the unit. If the error persists, contact a qualified AC technician.