Blown Fuse Air Conditioner
A blown fuse air conditioner fault is one of the most common causes of a Fujitsu unit showing no response at all. Fujitsu systems have internal fuses on both the indoor and outdoor PCB boards that protect the electronics from power spikes. If a fuse has blown, the affected board will not power up. This is often caused by a power surge, a lightning strike nearby or a momentary overvoltage on the power supply. Replacing a fuse requires opening the unit and should only be carried out by a licensed technician.
Requires a technician