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  1. Thread: Megger readings

    by jayguy
    Replies
    27
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    698

    While, what you are saying is fundamentally true,...

    While, what you are saying is fundamentally true, why would anyone meg a drive or other electronic device? Megging is for checking winding insulation only...you need to disconnect all other...
  2. Thread: Megger readings

    by jayguy
    Replies
    27
    Views
    698

    I have heard a lot of variations on what voltage...

    I have heard a lot of variations on what voltage to use around here. I use 1000 VDC on everything and I have not had a problem. Most meters are going to limit the current to 2 mA.
  3. Thread: Megger readings

    by jayguy
    Replies
    27
    Views
    698

    that would be true from a troubleshooting...

    that would be true from a troubleshooting standpoint. if you can find it with your 1.5 DCV output meter, then yes, a megger would definetly find it.
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    450

    I have been told that you are not supposed to...

    I have been told that you are not supposed to call people out and directly tell them they are wrong on this forum...even if they are wrong. :D

    I was thinking of something else when I posted that...
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    137

    Higher pressure has nothing to do with amp draw...

    Higher pressure has nothing to do with amp draw when comparing the efficiency of 1 unit to another unit.
  6. Replies
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    450

    The factory installs Schrader cores...what did...

    The factory installs Schrader cores...what did the last guy do? Be safe.
  7. Replies
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    226

    I gave you clues. The diagnostic is for the...

    I gave you clues. The diagnostic is for the SWITCH not the SENSOR.
  8. That would be dependent on you. Just because you...

    That would be dependent on you. Just because you are technically good at your job doesn't mean that you would be good at a new position "close" to your old position (sales, management, etc). But it...
  9. Replies
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    why did you change out the evaporator refrigerant...

    why did you change out the evaporator refrigerant temp sensor?

    did you ohm out the wiring? did you check for voltage in/out of the board at the 1TB3-24, 25 pins?

    by the way, those control...
  10. Thread: Megger readings

    by jayguy
    Replies
    27
    Views
    698

    Their old cap checker was pretty cool...before...

    Their old cap checker was pretty cool...before the function was incorporated into every DMM.
  11. Replies
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    535

    I ran into an AHU that had its fan cutoff removed...

    I ran into an AHU that had its fan cutoff removed at start up because some tools fell in to the fan from downstream of the fan (discharge up) and never "quite ran right" for several years.
  12. Thread: Megger readings

    by jayguy
    Replies
    27
    Views
    698

    That is the problem. You don't know if it is 20...

    That is the problem. You don't know if it is 20 MOhms or 2,000 ohms or 20 ohms. There are a lot of discussions on this topic around here. Perform a search and get yourself a real meter. I know lot if...
  13. Thread: Megger readings

    by jayguy
    Replies
    27
    Views
    698

    What meg value do you have for the first...

    What meg value do you have for the first compressor other than "below 20"? Does your meter only show "below 20" or does it give actual values. CCH are helpful from a Megohm standpoint.
  14. Replies
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    535

    Goggle Fan Wheel Cutoff You are changing the...

    Goggle Fan Wheel Cutoff

    You are changing the airflow when you change the speed and the 1 moving the most air is the 1 with the most ps. Are the amp draw values steady or are they pulsing?
  15. Replies
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    535

    You claim that the amp draw is double the other...

    You claim that the amp draw is double the other fan...where I this information coming from? Have you personally verified the drive display numbers are accurate?

    Check the duct work. That unit...
  16. Replies
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    535

    There 2 independent VFDs...1 for each fan. Double...

    There 2 independent VFDs...1 for each fan. Double check the programming and the sheaves/belts. Small changes could add up.

    Is this a recent problem?
  17. Replies
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    1,138

    oh, and as far as not posting because someone...

    oh, and as far as not posting because someone 4000 miles away behind a keyboard called you out or made you feel bad about yourself is a cop-out excuse. i hear that arguement all the time (not very...
  18. Replies
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    1,138

    I chose to say that you are wrong...because you...

    I chose to say that you are wrong...because you are. If you don't like "wrong", then what word would you like me to use? Should I not comment on things that are "not-100% correct"? Should I let...
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    Uh....wrong. Bubbles in th sight glass...

    Uh....wrong.

    Bubbles in th sight glass indicate not-100% liquid or not-100% vapor. Bubbles COULD be saturated refrigerant or it COULD be non-condensables.

    As for R410a systems with TXVs or...
  20. Replies
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    I have no idea what the wages are, however, you...

    I have no idea what the wages are, however, you will probably drop. Keep in mind that the cost of living is probably a lot lower too. Those of us who are 'not Californian' think that the prices we...
  21. Replies
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    1,138

    I would be concerned about too much oil...you...

    I would be concerned about too much oil...you have replaced the compressors (did you drain the old compressors and only put the same amount of oil back in?) and you have oil traps...I would be very...
  22. Thread: VFD info

    by jayguy
    Replies
    7
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    342

    Try the search feature...lots about them around...

    Try the search feature...lots about them around here.
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    That's true. I just assumed that he was going to...

    That's true. I just assumed that he was going to be servicing them. Maybe he just needs to be able to point them out in a room. Maybe he has the coolest 'Where's Waldo' book ever!
  24. Replies
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    Start in the Chillers forum. Get your post count...

    Start in the Chillers forum. Get your post count up and apply for Pro Membership.
  25. Replies
    18
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    1,349

    Does a chip on your shoulder count?

    Does a chip on your shoulder count?
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