Outdoor Board LED1 (green) blinks four times and LED2 (red) blinks one time alternately - Compressor overcurrent breaking

What does UH mean?

During startup or operation, the outdoor unit's LED1 (green) blinks four times and LED2 (red) blinks one time alternately, indicating that the compressor has stopped due to an overcurrent.

• Compressor overcurrent breaking.
• Faulty compressor.
• Power supply instability.

Click steps to track your progress.

1. 1

   Check for looseness, disconnection, or incorrect connection of the compressor wiring.

2. 2

   Measure resistance values among terminals on the compressor using a tester.

3. 3

   Check if the power supply voltage decreases during operation. Ensure stable power delivery.

4. 4

   If the issue persists, a qualified technician should inspect the compressor.