What would cause the ATS48 and/or the external HMI to randomly and continuously cycle or scroll through menu selections?

Issue:
Random and continuous cycle through menus on ATS48 and/or external HMI.

Product Line:
ATS48

Environment:
All models

Cause:
Display and/or HMI display is unstable

Resolution:
The HMI (keypad) could be scrolling, or the Soft Starter's display could be scrolling. Or they could BOTH be scrolling.
This typically indicates a problem with the control circuitry or keypad button.

1. Unplug the cable from the Soft Starter's Modbus port and power cycle. If the display on the Soft Starter is now functioning properly, the keypad (VW3G48101) and/or cable need to be replaced.
2. You can also try reseating the ribbon cable between the control board and the power board. Remove line voltage AND control voltage before performing these steps.
   • Remove the four screws holding the front control board and pull the control board off slowly
   • Re-seat both ends of the ribbon cable connecting the control board to the power board. Make sure the cable is connected firmly
   • Return line voltage and control voltage to the soft starter

If the integral display continues scrolling (after performing the above steps), replace the control board, part number VX4G481.

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