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Replace a faulty YASKAWA V1000 units

Note - this procedure was required to fix the DS1 pump in summer 2022.

The symptom was: on restart the pump thinks it is a EV-S20P model, not EV-S100P, and only the booster pump would run.

  1. Acquire a new YASKAWA V1000 from Ebara (~$1000)
  2. Unplug the power cord and place it somewhere within site.
  3. Open the top cover of the pump (steps above).
  4. Remove the top panel from the V1000 by removing the top screw and lifting off the plate with the V100 label.
    It should now look like below:


  5. Remove the 8 wires visible in the photo above from the terminal blocks
  6. Remove the plastic panel below the wires you just disconnected. I think it just pulls out.
    It should now look like below:


  7. Remove the 6 wires visible in the photo above from the terminal blocks
  8. There is a final wire to remove - the ground wire BP-E shown below


  9. Remove the 4 screws on the corners of the V1000 unit, then lift up.
    There is thermal paste underneath V1000 so it can be difficult to separate from the pump body. Inserting a sharp screwdriver underneath can help.

  10. To install the new V1000 follow this steps in reverse, applying new thermal paste to the bottom of the new V1000.
  11. After the V1000 is fully connected, plug the pump in a power it up to see if the ALM indicator is no longer illuminated.

  12. Reprogram the pump to not require N2 purge gas by following the instructions here:
    Instructions to change an EV-S100P to EV-S100 (no N2 purge gas)

  13. Reassemble the foreline and lead shielding using the reverse steps as above.
  14. Test that the pump operates in both local mode, and switch to "COM" mode and test controls through Epics.

Replace a faulty DVP402B

Note - this procedure was required to replace the DVB402B board on DS2 in fall 2022.

Symptom was the handheld controller reporting "IO COMM. ERROR" with error code 26 03


  1. Acquire a new DVB402B board from Ebara (~$160)
    1. P/N #A-2050-036-2400, BOARD, DRY, COMM, V10L05, DVP402B-V10L05
  2. Unplug the power cord and place it somewhere within site.
  3. Open the top cover of the pump (steps above). The DVB402B board is the top board that is pointed to below.
    Image Added
  4. Remove the aisle side poly shielding by lifting it straight up. Remove the few bricks behind the board that we're replacing.
    Image Added

  5. Remove the two screws that hold the board to the pump body. These are approximately where the arrows point at below.  They screw in from the outside of the pump, so that is why the shielding was removed. Use a small Phillips screw driver to remove the two screws.
    Image Added
  6. There are lots of connectors to remove now. See the photos below:
    Image Added Image AddedImage Added

    Image Added  Image Added  Image Added

    Image Added  Image Added

  7. There should be 2 more connectors still attached at this point, but they can stay as you should have enough room to work now.
  8. Undo the 4 screws on the corners of the upper board. It will still be connected by a connector between the boards
  9. Gently separate the two boards.
  10. Move the jumper cable from the old board to the new board
    Image Added

  11. Work in reverse to reinstall the new board.
    1. Connect the two boards together
    2. Make all the connections, including the ground
    3. Reattach the boards to the pump body
  12. After it is fully connected again, plug the pump in and connect the handheld controller. If the repair was successful then the "IO COMM ERR" message will be gone.

  13. Reprogram the pump to not require N2 purge gas by following the instructions here:
    Instructions to change an EV-S100P to EV-S100 (no N2 purge gas)

  14. Reassemble the foreline and lead shielding using the reverse steps as above.
  15. Test that the pump operates in both local mode, and switch to "COM" mode and test controls through Epics.


Replace a faulty DVP402B-EVS board

Note - this procedure was attempted on DS2 in fall 2022, but it did not solve the problem

Symptom was the handheld controller reporting "IO COMM. ERROR" with error code 26 03


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