Clean the Filters for Single-Way Ceiling Cassette SystemsUpdated an hour ago
Introduction
This article explains how to clean the filter for single-way ceiling cassette systems.
The procedure differs between models with circuit breakers and those with terminals.
The filter prevents dust and other particles from entering the indoor unit. Dust buildup can reduce the efficiency of the air conditioner. For optimum efficiency, clean the air filter every two weeks or more frequently if the unit is in a dusty area. Replace the filter with a new one if it's heavily clogged and cannot be cleaned.
This article applies to the following system:
Caution
- Always turn off the system and disconnect its power supply before cleaning or performing maintenance.
- An authorized dealer or licensed service provider must perform the removal and maintenance of the filter.
- When removing the filter, do not touch metal parts in the unit. The sharp metal edges can cut you.
- Do not expose the filter to direct sunlight when drying. This can shrink the filter.
Steps
Model with Circuit Breaker
1. In Stand-By mode, press and hold the "Mode" and "Down" buttons simultaneously on the remote control for 3 seconds. The remote control enters the panel-setting state and displays the "F2" code.
2. Press the "Down" button on the remote control, allowing the air grille to automatically go down. When it stops, pick up the air filter. 
a. Hold the upper edge of the filter with both hands. Gently turn and lift until the upper edge is free from the wire rope.
b. Lift the filter and move it forward slightly until the filter is separated from the four wire ropes.
c. Move the filter to the right until it is separated from the air grille, then the filter can be taken out. 
4. Reinstall the air filter.
5. Press the "Up" button on the remote control to reset the air grille.
Model with Terminal
1. Press the circular tabs to open the screw covers, then remove the two screws. 
2. Hold and open the air grille, then take out the air filter. 
3. Clean the air filter.
a. Ensure the air intake side is facing up when using the vacuum cleaner. 
b. Ensure the air intake side is facing down when using clean water. 
4. Reinstall the air filter.
5. Reinstall the air grille by attaching the two screws. Then, close the screw covers.