Drive Programming Invalid Instruction

What does E43 mean?

This fault indicates an issue with the Drive Programming logic stored in the inverter's memory. It can be triggered if the program data is corrupted or if the PRG (Drive Programming start) terminal is activated without a valid program having been successfully downloaded or stored.

• Corrupted Drive Programming (DP) data in the inverter's memory due to power fluctuation, EMI, or an interrupted programming sequence.
• Syntax error or unsupported instruction within the user's DP program that the inverter cannot process.
• PRG (Drive Programming start) terminal accidentally activated or held high during normal operation without a valid program loaded.
• Attempting to execute a DP program that was written for a different inverter model or an incompatible firmware version.
• Hardware fault on the inverter's control board affecting program memory access or execution.

Click steps to track your progress.

1. 1

   1. Verify the state of the PRG input terminal (e.g., X3); ensure it is not active unless intentionally executing a program.

2. 2

   2. Review the Drive Programming (DP) code line by line for any syntax errors, unrecognized commands, or logical inconsistencies.

3. 3

   3. Attempt to re-upload the DP program from a known good backup source, or re-enter it manually if the program is short and simple.

4. 4

   4. Clear the existing DP program (if possible via a parameter like b1-01) and then re-enter or re-upload the program.

5. 5

   5. Cycle power to the inverter and consider re-initializing parameters to factory defaults (if acceptable for the application) before reloading the DP program.