System is defective

What does F01665 mean?

The inverter has detected a critical internal defect, which could be a hardware failure, persistent software issue within the Control Unit, or an unconfigured 'STO via Power Module terminals' with active terminals. This compromises system integrity and requires immediate attention to prevent operational failure.

• Catastrophic internal hardware failure within the Control Unit or Power Module (e.g., main processor failure, memory corruption).
• Persistent and unrecoverable software error within the drive's operating system or safety firmware.
• Unconfigured 'STO via Power Module terminals' (e.g., X124 terminals) with active input signals causing a contradiction.
• Failure of internal communication between the Control Unit and the Power Module.
• Severe power supply instability to the Control Unit's internal electronics.

Click steps to track your progress.

1. 1

   Perform a full power cycle of the entire drive system (Power Module and Control Unit) to attempt a system reset.

2. 2

   Verify that if 'STO via Power Module terminals' is being used, the STO inputs (e.g., X124/1, X124/2) are correctly wired and provide the expected signals.

3. 3

   Carefully remove and reseat the Control Unit onto the Power Module to ensure proper electrical connection.

4. 4

   Check the drive's internal diagnostic buffer for any preceding or concurrent faults that might indicate the root cause (e.g., F01662 for internal communication).

5. 5

   As a last resort, attempt a factory reset of all parameters (e.g., P0970=1, P0971=1) and then re-commission the drive.