Internal hardware fault

What does F20.7 mean?

An unspecified error has occurred within the device's internal hardware. This indicates a critical malfunction that can lead to unpredictable operation and eventual complete system failure. If not resolved, the device cannot guarantee reliable control or safety functions.

• Component failure on the control board or power board due to thermal stress, manufacturing defect, or aging.
• Corrupted firmware or memory errors affecting the drive's internal operating logic.
• Damaged internal communication bus (e.g., ribbon cable connection) preventing proper component interaction.
• Electrostatically induced damage to sensitive internal circuits during handling or operation.

Click steps to track your progress.

1. 1

   Power cycle the device by switching off and on the main supply breaker for a minimum of 30 seconds.

2. 2

   Check the drive's event log or diagnostic memory (e.g., Parameter P8-10) for additional sub-codes related to the hardware fault.

3. 3

   Visually inspect the control board and power section for burnt components, bulging capacitors, or signs of overheating.

4. 4

   Verify the integrity of all internal ribbon cables and board-to-board connectors by carefully reseating them firmly.

5. 5

   Attempt a factory reset of drive parameters (e.g., Parameter P0-01 = 2) to rule out software corruption, then reload a known good parameter set.