Write disable error

What does Er1 mean?

This error occurs if a parameter setting was attempted while Pr.77 (Parameter write selection) disables write operations, if frequency jump ranges (Pr.31 to Pr.36) overlap, or if communication between the PU (Parameter Unit) and the inverter is abnormal. It indicates an issue preventing parameter modification or a communication problem.

• Attempt to write to a protected parameter memory location.
• Parameter write disabled via a system setting (e.g., P1-01=0).
• Hardware fault preventing modification of non-volatile memory.

Click steps to track your progress.

1. 1

   Check the setting of Pr.77 (Parameter write selection) to ensure parameter writing is enabled.

2. 2

   Review and correct any overlapping settings in Pr.31 to Pr.36 (frequency jump parameters).

3. 3

   Check the physical connection between the PU and the inverter for proper communication.