Each model comes with a table of fault codes, by which you can tell the cause of a malfunction. Before you decide to call a professional technician, you should understand that faults and error codes may result from a power surge or glitch. Therefore, if there is a problem, it is advisable to unplug a device for a little while and then plug it back in. Measures should be taken only if the code appears again.
Fujitsu air conditioner error code a1
Try to reset the indoor and the outdoor units by disconnecting power for a few minutes. Reconnect them and run the system. If the A1 error code appears again, this may be due to a high compressor discharge temperature in the outdoor unit.
This may be caused by a blockage in the refrigerant pipe or a refrigerant leak. Either way, the issue requires a serious repair, which can be carried out by a professional only.
When “EE” in Temperature Display is displayed, inspection of the air conditioning system is necessary.
Please consult authoilzed servise personnel if there is a problem with the heater.
Most likely, the A1 fault code is caused by a leak at flare fittings and/or isolation valves. Pressurize the system at 50 psig and check it with an electronic leak detection device. If no leak is detected, raise the pressure up to 100 psig, then 200 psig, etc. Prior to doing so, check the manual and be sure the pressure does not exceed the admissible level!