How to Troubleshoot the Fujitsu Wall-mounted Air Conditioner

Connect the Fujitsu air conditioner to a working electrical outlet if it does not operate. Replace or reset the fuse or circuit breaker as necessary. Note that the unit will shut off automatically if stopped and restarted immediately without pausing. This prevents motor overload.

Reduce the use of cigarettes or cooking odorous foods during air conditioner use if the air blown into the area by the unit begins to smell.

Adjust the thermostat to a warmer temperature if the air flow seems weak or too warm. Avoid setting the unit to "Super Quiet" mode, as this will reduce motor speed. Close doors and windows in the area to help keep the cool area inside.

Open the front intake grille and remove the filter if the unit performs poorly. Remove the filter and clean with a vacuum cleaner brush attachment or wash with clean, soapy water. Rinse the filter thoroughly and dry completely before placing the filter back into the air conditioner.

Replace the batteries in the remote control if the unit is not operational when buttons on it are pressed. Make sure the "+" ends of the battery are placed in the "+" marks in the battery compartment and push the batteries in firmly.