Question about Samsung AW0503B Air Conditioner

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3 leds of indoor unit were blinking

I have Samsung Air Conditioner type AS05Z1AZD and S/N 1471PDAYB10223Z.
Ihave a problem of my indoor unit because 3 leds were blinking and doesnot response by remote. The remote control show the key number like 0000 00 if i push off timer and up temperature together. May I know thekey number ? thank you for your attention

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  • Anonymous Feb 14, 2009

    I have the three lights blinking as well, i used two remotes and they both dont work on this unit. it is a split SC09ZW8/XSA

  • outoffaith Feb 14, 2009

    i have the same problem, i suspect it is a card fault.
    my model is SC09ZW8/XSA.
    i have a call logged into 1300362603

  • Anonymous Mar 26, 2009

    I have the same problem, 3 led blinking, not responding to remote. Technician came to my house, he said the problem is in the PCB within indoor unit.



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Posted on Jan 02, 2017

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This could be caused by a blown circuit breaker or fuse inside the unit, a damaged compressor or fan motor, faulty wires connecting the compressor or fans to the control board unit, a faulty or hung relay on the control board (this can sometimes be solved by tapping the relay with a screwdriver), or the starter capacitor for the compressor or fan motor.

Posted on Sep 20, 2009


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After I replaced the pcb on my samsung air conditioner indoor unit it won't start and all 3 led's are blinking

I have had similar problems with Samsung. Apparently, the indoor board fits a lot of different models and each has to be "programmed" in to suit your model. Not sure what was wrong with your machine before but it has been known for these units to have a faulty outdoor fan motor which causes the outdoor board to fail as well. When this happens, the indoor unit will usually work fine for about a minute or 2 and then shut down, with lights flashing. The outdoor wont start at all. If these were the symptoms, I would suggest putting your old indoor PCB back and then getting a new outdoor fan motor and outdoor PCB.

Apr 19, 2015 | Samsung Heating & Cooling

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as described the voltage you are seeing is fake. if there is no led lighting in the indoor unit check the small transformer in the indoor unit you should get 12V DC or 24V DC out from it

Feb 10, 2014 | LG Heating & Cooling

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When i start the a/c indoor unit working and after 1 minute of the indoor unit and blinking the green and red light.

Green blinks indicate communication to outdoor, but red light indicates communication problem. Check PCB.

Oct 16, 2011 | Samsung AS18A6RB Air Conditioner

1 Answer

Out door unit not running, left green led on indoor unit blinks.

conduct shutt off the main breaker of your unit then after several minutes try to shut it on please adjust your thermostat setting conduct observation.

Feb 20, 2011 | Mitsubishi MSZ09UN Air Conditioner

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Most of the time with those units... you have a refrigerant leak...

They also usually have led's that blink to give you a code as to what is wrong...
the blinking can be on the indoor unit or on the circuit board of the outdoor unit...

Here is a tip about troubleshooting your air conditioner...

There are many things that can cause your air conditioner not to cool...

Air Conditioner Trouble - Review the Possibilities


Feb 01, 2011 | Fujitsu Heating & Cooling

1 Answer

There is no cooling. After running a short time, the indoor unit only, the left LED blinks. The right LED turns off. I can't find anything about this. Could I be low on gas? Regards, Charles

look around them lights.., on the circuit boards.. or on the diagram.. them blinks are codes. so find the codes that are their .they will tell you the problem... p/s like 3 short flashes may mean fuse s are out at the dissconnect .you have to look and you will find it good luck

Aug 22, 2010 | Mitsubishi MSZ-A24NA Split System Air...

1 Answer

Indoor unit light blinking ( first n second light from top)

I have the same problem too. Aircon cannot switch on, two lights from the top is blinking. Everytime I turn on, the flip is open then close again with sound. The technician said the thermostat cable need to be replace. It cost about $15. The cable is 14" long. Hope this help.

Feb 16, 2010 | Samsung Heating & Cooling

1 Answer


The operating LED will be blinking 5 times, means that there is a
comunication error (serial comunication) between the outdoor and the indoor unit.

Dec 28, 2008 | LG LS-K1830CL Cool Mini Split Air...

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