PW0008
CPU SELF TEST ERROR(DCS PMC)
Fanuc · Alpha i Series Servo Amplifier
What does PW0008 mean?
The DCS PMC detected an error in its CPU self-test function and RAM check function. This indicates a critical hardware fault within the DCS PMC unit, necessitating a power cycle to attempt to clear the alarm.
Common Causes
- DCS PMC CPU internal memory (RAM) corruption.
- DCS PMC CPU hardware component failure.
- Power surge or brownout during DCS PMC operation.
- Firmware corruption in the DCS PMC.
- Overheating of the DCS PMC unit.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Perform a DCS PMC power cycle (turn off and on).
- 2
Check for visual signs of damage or overheating on the DCS PMC.
- 3
Reload the DCS PMC firmware from a verified source.
- 4
Measure supply voltage (e.g., 24VDC) to the DCS PMC.
- 5
If the fault persists, consider replacing the DCS PMC unit.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series Servo Amplifier