Keypad Loss (Cannot Write to LCD, Adv. Code 2)

What does 24 mean?

This fault indicates an issue with the keypad or its connection where the drive is unable to write data to the keypad's LCD display. This prevents the display of status, parameters, or fault information to the user, effectively rendering the local interface unusable for monitoring or configuration.

• Loose or damaged ribbon cable connecting the keypad to the control board.
• Faulty keypad unit itself, including the LCD display or its internal controller.
• Corrupted firmware or internal communication issues on the drive's control board preventing proper keypad interface.
• Electrostatic discharge (ESD) or electrical transients damaging the keypad's communication interface.
• Physical damage to the keypad display due to impact or environmental exposure (e.g., excessive moisture).

Click steps to track your progress.

1. 1

   1. De-energize and lock out the drive. Reseat the keypad ribbon cable, ensuring it is fully inserted and latched on both the keypad and control board sides.

2. 2

   2. Inspect the keypad ribbon cable for any tears, nicks, or bent pins. Replace the cable if any damage is found.

3. 3

   3. Temporarily install a known-good keypad from an identical drive (if available) to test if the issue is with the keypad unit.

4. 4

   4. Clean the keypad and control board connectors with a suitable electronic contact cleaner to remove any residue or corrosion.

5. 5

   5. Replace the keypad unit if testing with a known-good unit resolves the fault or if physical damage is evident.

6. 6

   6. Replace the drive's control board if the issue persists with a new keypad and verified cable.