OPERATION INDICATOR lamp blinks 4 times (Pattern A) - Abnormal high discharging temperature / Insufficient refrigerant

What does 4 mean?

The OPERATION INDICATOR lamp blinks four times in 'Output pattern A' from the indoor unit. This points to either an abnormally high discharge temperature or insufficient refrigerant in the system.

• Abnormal high discharging temperature.
• Insufficient refrigerant in the system.

Click steps to track your progress.

1. 1

   Check if the stop valves are fully open.

2. 2

   Verify that the unit is filled with the specified amount of refrigerant.

3. 3

   Ensure the connectors (TH4, LEV-A, and LEV-B) on the outdoor controller board are securely connected and not disconnected.