How to Remove Child Lock in Fujitsu AC: A Comprehensive Guide

Removing the child lock on a Fujitsu air conditioner is a straightforward process that can be accomplished by following a few simple steps. This comprehensive guide will walk you through the entire process, providing detailed instructions and technical insights to ensure a successful and hassle-free experience.

Accessing the “Monitor” Screen

The first step in removing the child lock is to access the “Monitor” screen on the control unit. This screen displays the setting status of functions or the operating status of each indoor unit. To access the “Monitor” screen, locate the control panel on your Fujitsu air conditioner and navigate to the appropriate menu or button.

Locating the “Cancel” Button

how to remove child lock in Fujitsu acImage source: Fujitsu AC by Dinkun Chen

Once you have accessed the “Monitor” screen, you will need to locate the “Cancel” button. This button is typically located on the control panel or the remote control, depending on the specific model of your Fujitsu air conditioner. Carefully examine the control panel or remote control to identify the “Cancel” button.

Releasing the Lock

With the “Monitor” screen displayed and the “Cancel” button identified, the next step is to press and hold the “Cancel” button for 2 seconds or more continuously. This action will release the child lock, and the “Key lock” display on the screen will turn off, indicating that the lock has been successfully removed.

Understanding the Child Lock Function

The child lock function on Fujitsu air conditioners is designed to prevent careless operation by children or unauthorized individuals. It is important to note that while the lock is activated, pressing any key on the control panel or remote control will cause the “CL” display to blink, indicating that the keys are locked.

Activating and Deactivating the Child Lock

The child lock function is locked at the factory and can only be activated or deactivated by pressing the “DAY (DAY OFF)” button and “TIMER SET” button simultaneously for 2 seconds or more. This process can be performed on the “Monitor” screen to either enable or disable the child lock feature.

Emergency Stop Mode

In addition to the standard child lock function, Fujitsu air conditioners also have an emergency stop mode. This mode can be set or reset by pressing the “On/Off” button for 4 seconds or more while touching an area outside the control panel. This feature can be useful in situations where you need to quickly disable the air conditioner’s operation, such as in the event of an emergency.

Operation Modes and Temperature Settings

Fujitsu air conditioners offer a variety of operation modes, including COOL/DRY and HEAT, with temperature settings ranging from 16 to 30°C. It is important to familiarize yourself with these modes and settings to ensure optimal performance and energy efficiency.

Economy Setting and Error Code Display

The economy setting on Fujitsu air conditioners is locked at the factory and can only be activated or deactivated by consulting authorized service personnel. If the “START/STOP” button on the control panel blinks, it indicates an error. In such cases, refer to the user manual for the error code display to troubleshoot the issue.

Operation Notes

Always remember to turn off the electrical breaker whenever cleaning the air conditioner or changing the air filter. Additionally, avoid installing the controller near a fireplace or other heating apparatus, as this can interfere with the unit’s operation.

By following the steps outlined in this comprehensive guide, you can successfully remove the child lock on your Fujitsu air conditioner and regain full control over its operation. Remember to refer to the user manual and consult authorized service personnel if you encounter any issues or require further assistance.


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