Our remote model ar-dl12 is not working since we changed the batteries.

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https://www.google.com/search?q=ar-rah2u+change+fahrenheit+to+celsius

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fujitsu change from farenheit to celcius - Air conditioners

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Dec 25, 2015 - "how change farenheit to celcius, remote control unit model ar-rah2u Turn off the remote, hold down the temp raise button until you see the .

Pull the new batteries and clean the terminals. If cleaning don't work the corrosion may have damaged the remote. Use a PC of sand paper, or scratch the surface that the batteries touch.

press the top button,then get a manual at manualslib.com

The reset button on the AR-DL10 is the 'ACL' button. On my unit it is just above the Start/Stop button. On some of them it is in the battery compartment.

How to get to the batteries in a AR-DL 10 Model Fujitsu Remote Control/ A/C

Pull it down to expose the controls inside.
To pull it down further to expose the batteries: PINCH BOTH SIDES OF THE slider at the top where it is knurled so it will bow out a little bit in the center AT the same time you may need to
slide an object under the slider to help it bow up a litter further.
WHILE DOING THIS: pull the slider further to expose the batteries. There are two plastic stops that the slider must clear to pull it down enough to get the new batteries placed. Before putting it back together: File down the two stops with a nail file so it is easier to do next time. - Who engineered this?

After changing the batteries you have to depress the RST button and if the remote has the abcd slide switch ensure it is set to A.

open the remote and carefully look at where the batteries make contact they sometimes bend in and dont make contact just pry them out a little and reinsert batteries and it often will work again

If your remote control have display but cannot transmit signal to the unit. Confirm first if the remote is really the problem, using your camera or cellphone camera as your eyes point the remote transmitter to your camera and "on" the remote. You should see light emits in your remote control, if no emitted light then the remote control is defective. But if there is a light the defect is in the unit receiver.

Check also if there is a reset or rst button in your remote control and reset it and try.

Check also if there are error codes in the unit, reset the unit by disconnecting the power supply in the unit for 10 sec. and "on" again and try.

The unit can be operate without remote control, use the manual button located in the unit.

If the remote control have no display replacement of remote is recommended.

Open the slide cover and pull the batteries out. Next press the ACL button on the remote and make sure the ABCD slide is on A