If water is leaking from a window type split air conditioner when it's turned on and running at full speed, it is likely due to condensation forming on the cooling coils and not being properly drained away. Here are some steps you can take to stop the water leakage:
Check the drainage system: Make sure that the air conditioner's drainage system is not clogged or blocked. Over time, dust, dirt, and debris can accumulate, hindering proper drainage. Locate the drainage pipe or tray and ensure it is free from any obstructions.
Tilt the unit: Window type split air conditioners should be installed with a slight downward tilt towards the outside. This allows condensation to flow outside through the drainage system. Check the unit's installation to see if it is angled correctly. If not, you may need to adjust the mounting or reinstall it with the proper tilt.
Clean the air filters: Dirty or clogged air filters can restrict airflow, leading to more condensation on the coils. Regularly clean or replace the air filters to maintain optimal airflow and reduce condensation.
Maintain room temperature: Running the air conditioner at extremely low temperatures can cause excessive condensation. Try setting the temperature at a moderate level, not too cold, which can help reduce condensation.
Reduce humidity: High humidity levels in the room can exacerbate condensation issues. Consider using a dehumidifier in the room to reduce humidity levels and prevent excessive condensation on the coils.
Check for refrigerant leaks: If the air conditioner is low on refrigerant, it can cause the coils to freeze up and then thaw, resulting in excessive water leakage. If you suspect a refrigerant leak, you should contact a professional technician to inspect and repair the unit.
Regular maintenance: Schedule regular maintenance for your air conditioner, ideally once a year, to ensure it is in good working condition. A professional technician can inspect the unit, clean the coils, and address any potential issues before they lead to water leakage.
If you've tried the above steps and the water leakage persists, it's best to contact a qualified HVAC technician to diagnose and repair the issue. They will have the expertise to identify the root cause of the problem and take appropriate actions to stop the water leakage.