Mitsubishi Wire EDM problems
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  1. #1
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    Default Mitsubishi Wire EDM problems

    So I am running a MV1200R Mitsubishi Wire EDM and for some reason my tank wont stay filled with water while running a program? ive been running the same format of programs for the last 2 years so i dont think its something in my program because nothing is different in comparison to my others. I've also cleaned my water sensors and made sure my WQ range is fine.

    So is this an issue for me to call Mitsubishi to come fix it or is it something i could potentially be doing wrong?

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    Common enough. Since you don't know what it is, I won't ask you when the last time you checked or changed your tank door seal was. Instead, I will tell you to research it and how to change it.

    ... because your tank door seal has worn out...

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    its not leaking anywhere or anything, its literally just flowing back into the resevior, because when its filled and running its on sort of a cycle to filter, waters going out to filter but not coming back in unless i stop and refill it

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    when i say stop and refill i mean hit stop and then hit the fill button

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    Yes. I understand. The condition has been covered ( here, on the forum ) many times. ( as well as many other forums ) Those of us who've owned Mitsis for any length of time are well versed in it. Use Google to search the forum and you'll find plenty of resources without one of us typing it all over again.

    The bottom line is that the seal that keeps the DI in the tank is allowing it to leak past. Thus, allowing your water level to fall... See where this is going?

    You can choose to pay a tech to come out and change it. Or, you can change it yourself. Either way, it will continue until it is remedied.

    Good luck.

  6. #6
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    Quote Originally Posted by Zahnrad Kopf View Post
    Yes. I understand. The condition has been covered ( here, on the forum ) many times. ( as well as many other forums ) Those of us who've owned Mitsis for any length of time are well versed in it. Use Google to search the forum and you'll find plenty of resources without one of us typing it all over again.

    The bottom line is that the seal that keeps the DI in the tank is allowing it to leak past. Thus, allowing your water level to fall... See where this is going?

    You can choose to pay a tech to come out and change it. Or, you can change it yourself. Either way, it will continue until it is remedied.

    Good luck.
    This is good advice, but I would also check the trough behind the seal plate and see if does not have a ton of water in it(imo its really obvious if the seal is bad) then I would go back and look at the sensor again. (especially where the 3 probes go into the housing..the plastic needs to be clean as well) it will cause the water level to drop if there is too much dirt on the plastic.

    I have also had the air cylinder that controls tank level get wedged with a slug & also had a the same cylinder "wear out" and need replaced causing issues similar to what you describe. Look there too, verify it is opening & closing properly.

    Please post back if you find the issue


    I dont know if the 1200 has the same type door seal as the 2400 but its gotta be the easiest thing to replace on the entire machine.

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    Have you noticed if it drains faster during a skim than a rough cut? If so, the drain gates are most likely blocked from closing all the way or the felt pad that acts as a thick gasket on each gate has fallen off and may be floating somewhere inside the dirty side of your fluid tank.

    BTW- you can hit 'Rapid Fill' while a program is running.


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