When energizing a new Samsung AC200JXAFNH/SA Ducted System for the first time, UP will be displayed on the outdoor main PCB. UP stands for un-prepared, it is not an error code as such, it is advising that the system has never been run and that a trial operation must be conducted before the system can be operated normally. The trial operation is initialized by simply pressing and holding the K1 button on the outdoor main PCB for a few seconds. What looks like two half t symbols will be displayed on the main PCB, one will be flashing. While the auto trail is being conducted, the system will start both the indoor and the outdoor units as it conducts a series of tests. The auto trail usually takes around 30 minutes to complete.