Red 5 Flashes, Green 3 Flashes (Single System) — CT Abnormal (Current Transformer Abnormal)

What does Red 5 Flashes, Green 3 Flashes mean?

The red LED flashes five times and the green LED flashes three times on the indoor unit. This indicates an abnormal reading from the Current Transformer (CT), suggesting an issue with current measurement.

• Faulty Current Transformer (CT) sensor.
• Wiring issue to the CT sensor.
• Overcurrent or unusual current flow in the system.

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power supply.

2. 2

   Wait for a few minutes, then reapply power to the unit.

3. 3

   If the error persists, there may be an electrical issue within the outdoor unit.

4. 4

   Contact an HVAC professional to inspect the CT sensor and power circuits.