E9 / 1 Red Flash - Drain trouble

What does E9 / 1 Red Flash mean?

The remote control displays E9, and the indoor unit's red LED flashes once (while the green LED keeps flashing). This indicates a problem with the unit's drainage system.

• A defective drain pump (DM), broken drain pump wire, or disconnected connector
• Anomalous float switch operation (malfunction)
• Defective indoor unit control PCB
• Defective option parts related to drainage

Click steps to track your progress.

1. 1

   Check the drain pan for any signs of overflow or blockages.

2. 2

   Verify that the drain hose is not kinked, clogged, or improperly sloped.

3. 3

   Turn off the air conditioner at the main power breaker, wait a few minutes, then turn it back on.

4. 4

   If the issue persists, contact a service technician to inspect the drain pump, float switch, and associated wiring.