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Are you asking what an Error Code means and then how to fix the cause?
In case of incorrect operation or machine malfunction, the screen will display the
description of error or icons to inform you.
CL key [CL] Clearing...
This key is used for clearing errors, information or data such as stitch count and frame
Error codes are in the Single Manual (final) pages 68 thru 73
Download this manual's .pdf file...: http://www.pantograms.com/images/meistergram/Meistergram_Single_Manual_Final.pdf
Hi....I also kept getting the check and rethread upper thread message, I\'d sew about 15 stitches and it\'d stop. Here\'s what I did. On the left of the machine, in the back there is a screw....loosen that screw, take cover off, then lift straigt up and out on the cover that has the 3 on it in your threading seqence. Next, I started inspecting and cleaning the thread route from top to bottom. Lo and behold....I get to the place where you come down the front of the machine and turn to go back up and I spot a little slit in the plastic piece so, when I was threading the machine I guess I was pulling it to far to the left causing it to wear a little slit in that piece....so, I finished cutting it off with a utility knife, used an emery board to smooth it down, put the covers back on and it works GREAT!!!! Who would\'ve ever that it\'d be so easy and save me a bunch of money!!! I sure hope this helps someone.
What machine make and model do you have and what does the bobbin look like?
You could go to this website and see if it helps you to identify the approriate bobbin for your machine. www.sewingpartsonline.com, www.sewusa.com also has threading up diagrams for many makes and models so this site may help you too.
There are several different makes of bobbins although many modern machines are now running plastic ones which look very similar. However, getting the right bobbin for your machine is important.
You may need to locate a manual to actually get an image or description of your machine's bobbin.
Was the inner zig zag gear replaced? To check this, look in the hole where the cams go. You should see the black plastic gear with 3 slots all the way around where the your cams lock on to. Look at the gear closely. You should NOT see any crack or splits in the plactic gear. If you do, then this why your go on properly.
We have a PC-3000 in which the 0/1/2/reset keys don't work as well. The panel is a membrane switch that I found on a parts site (sewingpartsonline dot com) for $119 plus shipping.
I have not done so but if you know someone who can disassemble the machine, remove the ribbon cable from its connection, and clean it (not the membrane rather the ribbon cable connector) you *might* solve the problem. Because our machine is very lightly used, I doubt that the membrane is failing as they seldom wear out.
If taken to a repair shop, I would guess the unit is beyond repair because it would be an easy 2 hours to repair (figure $75/hr or $150 plus the part for at least $375) which is half the price of a new machine.
Go to http://www.singerco.com/accessories/manuals.html and enter "Pro-4-D" (without the quotes, and I'm assuming pro40 is an error, because I'm not coming up with a model "pro40"). This will take you to a link where the manual can be purchased ($15.00) and downloaded.
Your problem is the top thread. Make sure you lift the presser lever BEFORE you thread the machine. After threading the machine, just before you thread the needle, lower the presser foot, and test the top tension by pulling down on the thead. If there is little or no tension, adjust the top tension to a higher number, say from 3 to 5, or from 5 to 7, and test the tension again. If you fail to increase the tension by above procedure, look for cotton that might be stuck in the tension blades and remove it. Hope this will help you