140891 UHC 600 Replacing the I/O Control Board

To avoid electrical shock or property damage, disconnect power before installing or servicing equipment.A qualified technician must perform the installation.

The I/O Control Board needs to be replaced when one of the following occur as determined by proper troubleshooting: power loss, communication failure, electrical issue, or heating issue.

1. Turn the power switch off.

2. Ensure unit is cool to the touch.

3. Unplug from the power source.



4. Using a cross tip bit, remove the four screws on top of the cabinet. Then, remove top cap.

5. Remove all electrical connections from the I/O board.



6. Using a 3/8 inch socket driver, remove the four nuts holding the I/O Control assembly to the shelf.

7. Remove I/O Control assembly.

   

8. Working in reverse, install new I/O Control assembly using steps 6 and 5. Note: Refer to the image above for communication wiring connections.

9. Working in reverse, complete steps 4 through 1 and return cabinet to operation.

10. Verify cabinet date, time, model, and serial number are correct. If settings are incorrect, do the following:

    1. Select the Settings tab on the main screen.

    2. Swipe to access the calendar, time, date, and unit information screens.

    3. Click the Lock in the bottom left corner and enter 1122.

    4. Save before exiting.