Red 4 Flashes, Green 3 Flashes (Single System) — Main Relay Welded

What does Red 4 Flashes, Green 3 Flashes mean?

The red LED flashes four times and the green LED flashes three times on the indoor unit. This indicates a problem with the main relay, suggesting it might be stuck in a closed or 'welded' position.

• Faulty main relay on the indoor or outdoor PCB.
• Overcurrent or power surge damage to the relay.
• Age-related wear and tear of the relay component.

Click steps to track your progress.

1. 1

   Immediately turn off the air conditioner at the circuit breaker to prevent potential damage.

2. 2

   Wait for several minutes, then try restoring power to see if the relay unsticks.

3. 3

   If the error persists, this is a serious electrical fault requiring immediate attention from a qualified technician.

4. 4

   Do not attempt to use the unit until it has been inspected and repaired.