Safety first: Turn off power before removing the control panel cover.

Dry the panel: If condensation or water is visible under the display cover, gently dry the area and improve sealing to prevent future ingress.
Check cable: Ensure the ribbon or communication cable between the keypad/display and main PCB is firmly connected.
Test with dry hands: Make sure your hands are dry and clean when pressing buttons; some panels are sensitive to moisture.
Replace HMI: If buttons remain unresponsive, replace the control panel (HMI) assembly with a SPRSUN-compatible part.

Control panel buttons do not respond or respond intermittently.

Possible Causes