Cause : Keypad communications error comes when a communications error occurred between the keypad and the inverter. This means a problem with the communication between the Fuji FRENIC-VG drive and its keypad. This prevents the user from interacting with the drive through the keypad.

"er2" fault in Fuji FRENIC-VG drive "indicate Keypad communications error". This means the drive is having trouble communicating with the keypad or operator panel. This error prevents you from controlling the drive via the keypad, and it could be caused by several factors related to wiring, connections, or hardware issues.

Troubleshooting Steps:

1. Check Connections:

   • Inspect the cable connecting the keypad to the drive. Ensure that both ends are securely plugged in and that the cable is free from damage.
   • If possible, try using a different cable to see if the issue is related to a faulty connection.

2. Test the Keypad:

   • If you have access to another compatible keypad, try connecting it to the drive to determine if the problem is with the original keypad.
   • Alternatively, try connecting the suspected faulty keypad to a different drive (if available) to see if it functions correctly.

3. Inspect for Interference:

   • Ensure that the communication cable is routed away from sources of electrical noise, such as power lines, motors, or other high-voltage equipment.
   • Use shielded cables if interference is suspected, and verify that grounding is properly implemented.

4. Check Keypad and Drive Settings:

   • Review the drive's configuration settings related to keypad communication. Ensure that the settings match the requirements of the keypad being used.
   • Check the keypad settings, if applicable, to ensure they are correctly configured to communicate with the drive.

5. Restart the Drive:

   • Power cycle the drive by turning it off and then back on. Sometimes, a simple reset can restore communication with the keypad.