Operator Fault

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This fault occurs specifically when the program keypad module is physically removed from the controller while the controller is still powered on. It is a protective measure to prevent unintended parameter changes or operational interruptions.

• Keypad module was physically disconnected or vibrated loose from the controller's front panel while the controller was still energized.
• Damaged or dirty contact pins on the keypad module or the controller's keypad interface port.
• Accidental removal of the keypad by personnel during operation or troubleshooting.
• Loose mounting screws or clips allowing the keypad to detach inadvertently.

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1. 1

   1. Power off the controller by opening the main disconnect. Wait for the DC bus discharge indicator to extinguish (e.g., LED or display '0V').

2. 2

   2. Carefully reinsert the program keypad module into its designated slot on the controller's front panel, ensuring it is fully seated and clicked into place.

3. 3

   3. Inspect the keypad module's connector pins and the controller's mating port for damage, bent pins, or foreign debris. Clean contacts with electrical contact cleaner if necessary.

4. 4

   4. Secure the keypad module using any locking clips or screws provided, ensuring a firm mechanical connection.

5. 5

   5. Power on the controller and confirm the fault is cleared and the keypad display is active.