I have the model AR-RAH1U and I just snipped jumper J5. It works in celsius now! Thanks a lot! Started with an exacto (did not work well), but finished with a pair of electronics cutter I remembered having...
hi ,i made the modif on my remote,i have remove the j5 jumper and reassemble the remote and every thing is ok ,but no more signal(the bip from the receiver),is it something i have to do to the receiver or to the remote to recover the signal new fujitsu 15 rls remote ar-rah1u thank you LUC
Hello, I have a problem with multi system unit, the out door unit is model aoy30lmaw4 and there are 3 indoor units models asy9lmacw. At all indoor units the green light fleshing consistently and the red light 5 times, after run test the red light fleshing consistently and the green light twice. At the out door unit all the fuses are fine and the leds are off. There is about 170V between legs 1 and leg 3, there is about 70V between legs 2 and leg 3, at all units. As far as I understood the problem is "serial reverse communication error". What can cause the problem?
Hi, I had a problem communicating with the 12RLS unit after I cut J5 to change over to degrees C, but I found out later that I had a bad connection on the jumper neer the batteries. The problem was not related to the changeover. Works fine in degrees celcius now. Thanks and have a great day.
Hi, I'm a new member. I saw this very interesting document [Link: old.ercoupe.com] and thought - may be there is a similar document that solves my problem?
I have used an USB-UIRT (http://www.usbuirt.com/) to record the codes from a Fujitsu remote control and save them in a computer. At certain times the computer then transmits the codes via the USB-UIRT to the heat pump.
For some reason, the other learned codes are missing the last 3 bits (6 burst pairs). Fortunately, as the doc you linked to shows, this is part of a checksum, so we can calculate what it should be. We can turn the pronto hex into a string of 1s and 0s, by noting that the burst pair 0010 0010 is a zero, while 0000 002F is a one. Tedious to do manually, but I used IRscope to import and decode the signals, using a repeat of 1 and selecting Advanced\IRP Data Format as binary. Highlight the decode to see the IRP form. Your Pronto example that isn't working decodes to 001010001100011000000000000010000000100001111111100100000000110010000001001 00000000000000000000000000000000000000000010011010. Breaking that into bytes gives the following. The bits need to be reversed in order to compute the checksum, and I've shown a few reversed sequences. The checksum starts at byte 8
30+81+04+20 = D5 and we need to add 2B to D5 to get a sum of x00.
Reverse 2B=00101011 to 11010100 = D4. It's nice to see that the mystery byte starts with D, implying that our computation is probably correct.
So the last three bits are 100 or in Pronto 0000 002F 0010 0010 0010 0010
Here's your non-working signal with yellow denoting a change, and green an insert.
The 125 binary bits from IRScope: 001010001100011000000000000010000000100001111111100100000000110010000110001 00000000000000000000000000000000000000000010011010 Break this into groups of 8 and skip the first 7 bytes, since the checksum is computed on bytes 8-16: reversed hexadecimal 00001100 00110000 30 10000110 01100001 61 00100000 00000100 04 00000000 00000000 00 00000000 00000000 00 00000000 00000000 00 00000000 00000000 00 00000100 00100000 20 11010??? total= B5 0x100 - B5 = 4B = 01001011 11010010 (reversed) This is the last 8 bits We need to insert 010 or 0010 0010 0010 002F 0010 0010
If this still doesn't make sense, let me know how far you get--e.g. did you get the binary 125 bits from IRScope?
Thanks again! I am a MSc and not uninterested in math, so I thought this would be easy to understand - I was disappointed, however. But of course, I graduated many years ago. So, I still have a number of questions, if you care to teach me:
I managed to get the binary bits from IRScope, manually break them into bytes of 8 bits and reverse them. But - Why reverse? With help of the Windows Calculator I computed the hex values. 100-B5=4B= 100 1011 is also ok, but - Where does 0x100 come from? Reversed 11010010 - Why insert 010? Where does it come from?
Isn't there an easier way to create the checksum? Or is it a secret of Fujitsu, which you have revealed?
I got the information from the PDF that you linked in your first post. It says that Word (byte, really) 16 is the checksum, and Word 16 is chosen to make words 8 through 16 add up to 0x100, or 0x200, etc. Put another way, Word 16 is chosen to make the last two digits of the sum be 00. So to compute Word 16, add up words 8-15, and subtract the least 2 digits from 0x100.
In IR signals, we can send the least significant bit first or send the most significant bit first. It's just a choice that the designers of the airconditioner made. All the data in the PDF is arranged so that each word is to be sent with the least significant bit first. But IRScope presents the bits in the order received, and shows the first bit received on the left side of the word, while the PDF is setup so that the bit which is received first is put on the right side of the word. So we have to reverse the bits provided by IRScope to get the LSB form that matches the PDF. If we don't do that, the checksum formula won't work.
Once the check sum is calculated, it needs to be reversed, because Pronto Hex needs the bits in the order that they will be transmitted.
Now recall that the decode from IRScope gave just 5 bits of Word 16: 11010, meaning that we don't know the last 3 bits--Word 16 is 11010??? Our reversed Word 16 that we just calculated is 11010010. Our calculated Word 16 agrees with the decode for the first 5 digits (11010) and we then insert the last 3 bits into the Pronto Hex.
Here is the brief how to use it. 1.Connect USB-UIRT to my laptop, and install the driver 2.Launch the software called “USB-UIRT Learn Helper Utility”, and press “Learn IR Code” , and press the button of the remote controller toward USB-UIRT 3.IR Code will be shown 4.To test whether the code is learned properly or not, just press “TEST Transmit IR Code”. Then the IR signal will be blasted from the product, and I can make sure. 5.I can paste the IR code(ex, like this website), and test also.
I have learned a lot of IR signals of eclectic devices with this method before.
OK, actually I have trouble to learn Fujitsu Air-conditioner.(A/C) Judging from conclusion, only “STOP” signal could be learned properly.
But other signals below can not be learned. (see below) 24-HEAT- AUTO, 25-HEAT- AUTO, etc….
(Degree is different from your site. Because here is using “Celsius” in Japan.) [Link: texloc.com]
For example, here is the code which I tried to learn “24-COOL-AUTO”. This is not working. [Link: sugarsync.com]
If I pressed “TEST Transmit IR Code”, nothing happened, although I tried to learn properly.
So I almost give up to learn Fujitsu A/C signal by USB-UIRT. Then I discovered this website. That’s why I mind to post here.
HOWEVER when I copied codes from this site, it works with some of Codes!! NOT ALL. The code which it works with is, Posts 21(above), Post 24 [Link: remotecentral.com]
Would someone advice me what’s the difference between the code which works with and other codes?
Sorry , I am not native English speaker. So I am happy if you could advice me as easily as possible you can.
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