Error E9 / Indoor Red LED Flashes Once — Indoor PCB float switch or drain motor circuit fault

What does E9 / Indoor Red LED 1 flash mean?

Error E9, indicated by a single flash of the indoor unit's red LED, means there's a defective input circuit for the float switch or a defective output circuit for the drain motor on the indoor PCB.

• Defective float switch input circuit on indoor PCB
• Defective drain motor output circuit on indoor PCB

Click steps to track your progress.

1. 1

   Turn off the air conditioner's main power.

2. 2

   Inspect the connections for both the float switch and the drain motor to the indoor PCB.

3. 3

   Ensure no moisture or debris is affecting the PCB itself.

4. 4

   This error typically points to an internal electronic fault, requiring a professional technician.

5. 5

   Contact service to diagnose and repair or replace the indoor PCB.