Mobile Technician is a free-to-use Android application developed by FUJITSU GENERAL LIMITED. It is a troubleshooting tool for air conditioners, wireless LAN adaptors, and air to water. The app is designed to help users check the condition of their air conditioners. It offers features such as error code check, troubleshooting, and sensors check. However, it is only applicable to RAC/PAC models with new serial communication method (4th digit of model code is "G" or "H" for example AS*"G"--, or AU*"H"--), and for VRF, models V-II, J-II or later are applicable.

The app is user-friendly and easy to navigate. It provides useful information about the air conditioner's condition, which can help users to identify any issues and resolve them quickly. However, it is important to note that when using Android 9 or later, the refresh interval of the Wifi analyzer will be delayed. Overall, Mobile Technician is a helpful tool for FUJITSU GENERAL Air Conditioner users who want to keep their air conditioners in good condition.