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  • Hobart HL 662 dough mixer wont start

     fixbear updated 1 month, 4 weeks ago 4 Members · 36 Posts
  • fixitnow - ontario

    Member
    March 28, 2020 at 9:16 am

    Hello. The mix motor doesnt start when start button is pressed and the timer doesnt start counting down. The motor contactor pulls in, but there is no output from the VFD . This is a new VFD. looking for any suggestions or service documentation . thanks

  • ectofix - Nashville

    Member
    March 28, 2020 at 1:11 pm

    What’s the part number of the new VFD? Is it OEM?

  • fixitnow - ontario

    Member
    March 28, 2020 at 1:18 pm

    yes it is a hobart part #00-937463 its a little different than the old one but they supplied a wiring harness adaptor. it has a digital display, the old one didnt . the display matches whatever is on the timer display.

  • shawnforan - Dover, Tn

    Member
    March 28, 2020 at 2:21 pm

    Ensure the wire safety cage and the mixing bowl are installed and locked in the closed position. If they are off even a bit it won’t make contact with the safety shut off and the mixer will not start.

  • fixitnow - ontario

    Member
    March 28, 2020 at 2:31 pm

    thanks yeh im sure we are ok there becasue the contactor pulls in and if the cage isnt closed it doesnt ?

  • shawnforan - Dover, Tn

    Member
    March 28, 2020 at 4:51 pm

    Here is a copy of the service manual for you unit. Maybe this will help you narrow down the problem.


    Attachments:
  • shawnforan - Dover, Tn

    Member
    March 28, 2020 at 4:54 pm

    Your and download a copy here if the attachment doesn’t work.

  • shawnforan - Dover, Tn

    Member
    March 28, 2020 at 4:57 pm
  • fixitnow - ontario

    Member
    March 28, 2020 at 6:14 pm

    Thank you so much! I dont think that manual covers this machine . the one im working on is an HL662 Legacy . would it be too much to ask for service manual for that? thanks again

  • ectofix - Nashville

    Member
    March 28, 2020 at 6:15 pm

    AW…Shawn. I thought you were on to something.

    Unfortunately that manual is for the classic H600 series mixers. Fixitnow’s mixer is a newer Legacy series mixer (represented in the model number by the L in HL).

    That manual has nothing to do with his HL662 mixer. Good on you for trying, though.

  • ectofix - Nashville

    Member
    March 28, 2020 at 6:18 pm

    @fixitnow

    You indicated in another forum that a Hobart tech replaced the VFD. Why aren’t THEY addressing this issue? After all, (per you statement there) if they replaced a $2000 VFD and it still doesn’t work, then they should see this through for you.

    BTW: The part number you gave me earlier (00-937463) is NOT the part number for the VFD.

    I’m confused…

    EDIT: NEVERMIND. Apparently Google is NOT my friend today.

  • shawnforan - Dover, Tn

    Member
    March 28, 2020 at 6:30 pm

    Agreed ectofix, the service company should own this problem. I’m just thinking outload here, but have you verified that even though the contactor pulls in, that there is power coming out of the contactor?

  • fixitnow - ontario

    Member
    March 28, 2020 at 6:33 pm

    hello. a hobart tech didnt replace the drive, we did

    based on the advice of an on call hobart tech that actually helped us. ( they usually wont help ,this guy did). and thats the part number i have, the replacement drive looks like an upgrade to the original,a little different with a digital display, but adaptor harnessess came with it , perhaps that explains the different part number?

  • fixitnow - ontario

    Member
    March 28, 2020 at 6:34 pm

    shawnforan , the power comes from the drive output to the contactor, so even though the contactor pulls in, no power to the motor

    • fixbear - ADK NY

      Member
      March 28, 2020 at 6:41 pm

      But did you actually measure the phase output voltages? Just because you hear and see a contactor close, Doesn’t mean the internal contacts are conducting electricity.

  • fixitnow - ontario

    Member
    March 28, 2020 at 6:51 pm

    hello yes, 208 volts at L1 ,L2 and L3 is present at all times at the VFD inputs. the VFD outputs go to the conator, not directly to the motor . when the start button is pressed, the contactor coil pulls in, but there is no voltage at the output of th drive, so none at the contactor. its like the drive isnt activating with the start button.

  • fixitnow - ontario

    Member
    March 28, 2020 at 6:51 pm

    hello yes, 208 volts at L1 ,L2 and L3 is present at all times at the VFD inputs. the VFD outputs go to the conator, not directly to the motor . when the start button is pressed, the contactor coil pulls in, but there is no voltage at the output of th drive, so none at the contactor. its like the drive isnt activating with the start button.

  • ectofix - Nashville

    Member
    March 28, 2020 at 6:59 pm

    <div>Ah. Gotcha after I re-read it.</div><div>

    Are the time and speed displays showing proper displays when you turn the knobs?

    </div><div>

    </div>

    • ectofix - Nashville

      Member
      March 28, 2020 at 6:59 pm

      effing <div> divs

  • fixitnow - ontario

    Member
    March 28, 2020 at 7:02 pm

    yes they are and when you change the time on the display, the same happens on the drive. the hobart tech told our tech that because the time doesnt start to count down when the start button is pressed indicated a bad VFD

  • fixitnow - ontario

    Member
    March 28, 2020 at 7:03 pm

    if i only had a manual…

  • ectofix - Nashville

    Member
    March 28, 2020 at 7:09 pm

    The contactor pulling in verifies that all safeties are made and the start switch works. Appears that VFD isn’t getting proper communication to tell it to ramp up.

    I’m no expert on those systems. I have one HL1400 and numerous HL200s to maintain, but that problem never arose.

    I’d have to be there to even BEGIN opening my mind to the possible problems to then narrow it down to possible causes. It sound like a simple connectivity issue, a faulty encoder , mis-match of incoming vs rated VFD voltage, etc etc.

    Given your problem, I WILL provide you a download that I got from Hobart’s Australian website some years ago before they secured accessibility to service manuals. This manual is on a HL1400 – NOT a HL600 series.

    The differences between THOSE mixers and your HL662 might be MANY. Otherwise, they would be part of the same service manual. For instance, there’s no such thing as a TWO SPEED HL1400 (I don’t think), while your HL662 is just THAT.

    NONETHELESS. This might help a little…or maybe not.


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  • fixitnow - ontario

    Member
    March 28, 2020 at 7:23 pm

    well its very similiar at least, thank you!

    i will let you know the outcome

  • ectofix - Nashville

    Member
    March 28, 2020 at 7:24 pm

    Looks like the HL662 lacks an interface board, whereas the HL1400 uses one. So…that manual is probably useless to you. The two machines are very different in the control circuit.


    Attachments:
    • ectofix - Nashville

      Member
      March 28, 2020 at 7:26 pm

      Don’t know how I reposted an attachment. I didn’t do that. THIS and my previous reply were brand new replies.


      Attachments:
  • fixbear - ADK NY

    Member
    March 29, 2020 at 7:32 am

    Check for 5 volts DC at the FWD and CM terminals . That’s what tells the VFD to run.

    It sounds like you have a cable connection problem from the timer board to the VFD.

  • fixitnow - ontario

    Member
    March 29, 2020 at 8:11 am

    thanks! that gives me a starting point .

    • fixbear - ADK NY

      Member
      March 29, 2020 at 12:12 pm

      I can’t remember, some were 24 volt DC. But if you check it at the VFD block for a forward/common DC voltage signal it will prove your wiring harness and connectors.

      • fixbear - ADK NY

        Member
        March 29, 2020 at 12:13 pm

        Also check the interface board connection to the timer board.

  • fixitnow - ontario

    Member
    March 30, 2020 at 4:53 pm

    no voltage at those terminals . thinking its the timer board now

    • fixbear - ADK NY

      Member
      March 30, 2020 at 9:09 pm

      Now check the forward and common on the interface for DC voltage. Then back to the timer.

      • fixbear - ADK NY

        Member
        March 30, 2020 at 9:10 pm

        Make sure you have SHARP narrow probes for the back of the plug

  • fixbear - ADK NY

    Member
    March 30, 2020 at 9:15 pm

    The timer board is sending a signal, because the contactor is closing. But the interface board to the VFD may not be.

  • fixitnow - ontario

    Member
    March 31, 2020 at 5:31 pm

    i dont think it has an interface board that i can see? just a timer board

    • fixbear - ADK NY

      Member
      March 31, 2020 at 6:41 pm

      The same applies, check for the signal voltage on the timer board plug cable to the VFD. No DC voltage to the VFD, no run. I haven’t seen one without the small interface board attached to the timer board. But I’m sure that Hobart has probably added it into the timer to save money. One part instead of two.

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