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  1. #1
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default Syncrowave 250- no spark at points

    Serial number- KG234930

    Can't get high freq spark- CR5 will not engage when remote is triggered.
    I have 2 remotes- both work with 2 identical Syncrowave 250's.

    Machine stick welds fine.

    2 Miller techs gave me my checklist methods-

    • Backfeed 115 volts (wall circuit) to low side of hi freq transformer.
    Worked! Beautiful blue sparks (clean, shiny- gapped.008)

    • switched PC1 board from identical, working machine- next serial number : )
    Working board didn't help CR5- suspect board controls donor machine.

    • switched CR5 from same machine-
    No joy- CR5 doesn't function in remote.

    • switched S3 switch-
    Same thing- nothing, nada- no hi freq sparks.

    What am I missing?

    Thanks, in advance.

    Mike
    Last edited by mjak; 07-17-2013 at 02:16 PM. Reason: Because I'm a dumb ass

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,682

    Default

    And the serial# is, umteen different diagrams.....

  3. #3
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default Kg234930

    Serial number added. My apologies- I know better.

    -------------
    Checked 14 pin receptacle- A to E,D,C,B. .2 volts ; (

    Gas valve cycles when control is switched from on to remote.

    Mike

  4. #4
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,682

    Default

    Thats a toughy, perhaps the on/off/ continuous switch is jammed. does the gas turn off post flow? Do you have the preflow option? Do you have both the output and heat controller switches in remote?

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,682

    Default

    Quote Originally Posted by mjak View Post
    Serial number added. My apologies- I know better.

    -------------
    Checked 14 pin receptacle- A to E,D,C,B. .2 volts ; (

    Gas valve cycles when control is switched from on to remote.

    Mike

    Don't bother checking for voltages, there isn't any, other than the 10 VDC for output control.

  6. #6
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default

    Does not have preflow or spot time.

    Both remote switches are on.

    Gas flow does turn off, depending on timer setting.

    -------------

    Do CR1 and CR2 affect hi freq?
    I could swap from working machines.

    How does hi freq receptacle/board function without power?

  7. #7
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,682

    Default

    0-10 volts DC on C,E,D for control A&B are contactor circuit and thats it.

    CR1 is only for dc tig so hf start only

    CR2 runs the gas solinoied


    So if CR5 is indeed working, switches are in remote, and your curcuit breaker is pushed in, you will have 115Vac to run your hf circuit.

    Its likely though that CR5 is not working because you have a damaged switch

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