Make sure the AC is set to Cool Mode and not Fan Mode or Dry Mode. Wrong mode is a common reason for low cooling.
Set the temperature between 18°C and 22°C and allow the AC a few minutes to respond.
Open the front cover and check if the filter is dusty. A dirty filter blocks airflow and reduces cooling.
Make sure the room is properly closed so cool air does not escape outside.
Let the AC run for 10 minutes and check if the room feels cooler. If cooling is still weak, technician support may be needed.
Use Cool Mode, keep the room closed, and clean filters regularly for better cooling.