I had a similar problem with only fan air then the blinking lights, found out that mice had got into the circuit board and corroded some connections with their urine. I would try the above solution by turning the power off for ten sec first but remember that you have to leave it for a few minutes before you operate remote.
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Hi Russell Webe,
just a guess, but sounds as though the remote receiver board is faulty, however you might try new batteries in the remote first,it may help. failing that it is time to call the serviceman. Also try turning the power off to the Ac unit for about 5 minutes and then back on again. This will reset the electronics and again may solve your problem
First check your timer on and off. If you want to reset, remove batteries from remote and power off to unit. Reset it. Now run the unit. Set temp mode once again in your remote and wait for 3 minutes. If still out door unit not working, check power line to out door unit.
I have same problem like yours to my newly installed Fujitsu multi-split system (the first time use since system installed 1 week ago). I rang the electrician who did the installation; he said it must be the units themselves nothing to do with electricity.
Okay, then I rang Fujitsu and their local service agent. They suggested me to switch off C/B for an hour to reset the units. I followed the instruction but the indoor units still did not respond to remote control...
It simply looks like no power supply to indoor units (they are hard-wired to the outdoor unit). So I used a multi-meter to test the power terminals of indoor units (Danger! If you have no idea about this, don't even try! ): it seemed no power supply even C/B is on. I turned to the isolator which next to the outdoor unit. The isolator was making arcing noise when I switched it on and off. The indoor units suddenly turned on for few minutes then died again.
So I figured out the problem is that crooked isolator. I called the unhappy electrician to replace the isolator. End story....
The unit has a problem with the safety device, its either defective or have some error. Try to reset the error by disconnecting the power supply for 10sec. then "on" and try. If error still exists may be some of the safety device is defective. You need a qualified technician for this problem.
Check also the air filter if clean and clean if dirty and reset the error.
Check your remote control by using a camera or cellphone camera as your
eyes to confirm if the remote control is ok. Point the remote control
transmitter to your camera and check if a light emits in your remote
control transmitter. If no light then the remote control is defective,
but if the light is present then the remote is ok and the unit
receiver board itself is defective.
Check also if there is a reset or rst button on the remote control, press the button and test the remote.