Page History

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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 RemovedThe DVB402B board is mounted on top of the DVP402B-EVS board.
   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.
   
   
   
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.
   
6. There are lots of connectors to remove now. See the photos below:
   
   
      
   
    
   
   
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
    
    
    
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.

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

1. Acquire a new DVB402B-EVS board from Ebara (~$350)

   1. P/N: A-2150-030-9200, BOARD, MOUNTING, FR4, 4LAYER, 1.6MM, 190-65, DVP401B-EVS

   2. Request that Ebara programs it before sending the board. Otherwise an Ebara tech will need to come on site and load software onto the new board once installed.
      
      Image Added
2. Follow the steps for replacing the DVP402B board, but continue to disconnect the final 2 connectors
3. With the top board (DVP401B) removed, swap the standoffs and jumper from the old DVP401B-EVS board to the new one.
4. Reattach the old (or new) DVP401B board, and follow the previous sections procedure to reinstall the board assembly.
5. If the board was not-preprogrammed, then power the pump on and have the Ebara service tech load the new software.
6. If the repair was successful, then 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)
   
   
7. Reassemble the foreline and lead shielding using the reverse steps as above.
8. Test that the pump operates in both local mode, and switch to "COM" mode and test controls through Epics.