Outdoor Board LED1 (green) blinks four times and LED2 (red) blinks three times alternately - Abnormality of power module

¿Qué significa U3, U4 ?

During startup or operation, the outdoor unit's LED1 (green) blinks four times and LED2 (red) blinks three times alternately, indicating an abnormality within the power module.

• Abnormality of power module.
• Faulty power module components.
• Power supply issues affecting the module.

Haga clic en los pasos para seguir su progreso.

1. 1

   Check for looseness, disconnection, or incorrect connection of the compressor wiring, as power module issues can impact the compressor.

2. 2

   Measure resistance values among terminals on the compressor using a tester to rule out related issues.

3. 3

   Ensure the power supply voltage is stable and within specifications.

4. 4

   If the error persists, the power module likely requires professional inspection or replacement.