Operation LED blinks 5 times, Timer LED blinks 7 times, and wired remote shows 57 — Damper error.

What does Operation 5 Times / Timer 7 Times / 57 mean?

The limit switch did not detect the closing of the damper (upper airflow) even though the damper was commanded to close.

• Limit switch malfunction.
• Loose connection of CN18 or shorted/pinched wire.
• Obstructions preventing damper movement.

Click steps to track your progress.

1. 1

   Power off the indoor unit and visually inspect the damper for any obstructions that might prevent it from closing fully.

2. 2

   Manually check if the damper moves freely.

3. 3

   If comfortable, check the connector (CN18) and wiring for any looseness, shorts, or pinches.

4. 4

   Reset power to the unit. If the error persists, professional service is needed to check the limit switch or damper motor.