If the fan speed of the Mijia Air Conditioner Pro Eco 5-Star 1.5 HP Inverter cannot be adjusted, you can follow these steps to troubleshoot:
1. Using the remote control:
(1). Check if the remote control batteries are functional. Replace them if necessary;
(2). Ensure the remote control is displaying correctly and that other buttons are working;
(3). Please confirm that you are checking the fan speed level on the LCD display area at the top of the remote control, and use the fan speed button to adjust it;
(4). Confirm that the air conditioner receives the remote control signals (listen for a beep sound);
(5). Please turn off the air conditioner for 3-5 minutes and then restart it to see if the issue is resolved;
(6). If the issue remains unresolved, please contact the after-sales service center.
2. Using the Mi Home/Xiaomi Home APP:
(1). Disconnect the air conditioner from the Mi Home/Xiaomi Home APP (remove the device from the APP and reset the Wi-Fi), then try using only the remote control;
(2). Check for possible interference from other household devices operating on remote control;
(3). If the issue persists, it could be a hardware problem, requiring after-sales service;
(4). If the issue disappears, it is due to smart settings in the Mi Home/Xiaomi Home APP. Please reset the Wi-Fi and clear historical data in the APP.
If neither the remote control nor the APP can control the air conditioner, please request after-sales service for inspection.