64A1
Internal file load
ABB · ACS880
What does 64A1 mean?
An internal file read error has occurred within the drive. This means the drive cannot access critical internal files required for its operation, leading to a non-resettable fault. This could indicate corrupted internal storage or a hardware issue.
Common Causes
- Corruption of internal non-volatile memory (e.g., flash memory, EEPROM) storing critical system files.
- Drive's file system integrity compromised due to abrupt power loss during a file write operation.
- Incompatible file version loaded into the drive (e.g., mismatch with firmware).
- Hardware failure of the memory chip or its controller on the control board.
- Incorrect checksum calculated for a critical internal file upon boot.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Perform a power cycle of the drive by disconnecting input power for 60 seconds.
- 2
Attempt a full factory reset of the drive (e.g., P0-10 = 1).
- 3
Reinstall the drive's firmware using a verified firmware package.
- 4
If the drive supports an SD card or USB for internal file storage, verify its integrity or replace it.
- 5
Check for any physical damage on the control board (e.g., burnt components, loose connections).
Verified technical data. Last updated: March 2026
Related Faults
Source: ABB ACS880