Timer/Check Indicator Lamp (Yellow) Short Flash — Air conditioner malfunction

What does Timer/Check Indicator Lamp (Yellow) Short Flash mean?

The yellow Timer/Check indicator lamp flashes with a short pattern (0.5 seconds on, 0.5 seconds off), signaling an internal malfunction. The air conditioner will stop, and an address number and error code may be shown on the indoor unit's display. For specific models (FDTW, FDK, FDFW), the Check1/Check2 lamps will blink to indicate the error code number.

• Internal system malfunction
• Unspecified error requiring professional diagnosis

Click steps to track your progress.

1. 1

   Observe the indoor unit's display carefully for any address number and specific error code.

2. 2

   If the display turns off, operate the remote control or press the BACKUP button to reactivate the display.

3. 3

   For models FDTW, FDK, and FDFW, note the number of blinks on the Check1 and Check2 indicator lamps, as these represent the error code.

4. 4

   Press the ON/OFF button to place the air conditioner in stop mode.

5. 5

   Contact your dealer or a qualified service technician, providing them with the observed address number, error code, symptoms, air conditioner type, and model name.