Applicable Systems
DVP
AH500
AS300
C2000
MS300
Symptoms
The drive trips. The keypad displays E06, indicating a CPU fault. The drive's internal processor has detected a hardware or firmware error.
Possible Causes
- CPU hardware failure
- Firmware corruption
- Internal power supply to the CPU failed
- Watchdog timer expired on the CPU
Troubleshooting Steps
- Step 1: Note the full error code for the service technician
Record all fault information - Step 2: Power cycle the drive to see if the fault clears
Fault may clear if it was transient - Step 3: If the fault persists, attempt a firmware re-flash
Firmware update may resolve corruption - Step 4: If the fault still persists, the CPU hardware is damaged
Drive needs replacement or service
How to Reset
To reset: 1) Power cycle the drive. 2) If the fault returns, re-flash the firmware. 3) If the fault still persists, the CPU is permanently damaged. Contact Delta service. Caution: CPU faults often indicate permanent hardware failure.
Frequently Asked Questions
- Q: What causes a CPU fault in a drive?
Common causes include electrical transients damaging the CPU, firmware corruption from interrupted updates, internal power supply failures, and watchdog timeouts indicating the CPU is no longer executing properly.
- Q: Is a CPU fault repairable?
If caused by firmware corruption, re-flashing may fix it. If caused by hardware failure, the drive's control board must be replaced. Contact Delta service for board-level repair.
Source: Delta C2000 Series User Manual, 2023
Category: PLC & VFD