FANUC robot won't start — error codes to check
Start-up failures span power supply, main computer boot, enabling chain and configuration faults. These are the fault codes to check when the controller does not come up.
15 FANUC fault codes match this symptom — start with the most frequent ones below.
- CMCC-000WARN unknown error (CM00)
- CMCC-001WARN CMC global variable failure
- CMCC-008WARN Unsupported function code
- FXTL-079Sub-CPU did not start
- GUID-057WARN Can't init tracking. L:…
- MEMO-103WARN Check sum error occurred
- PRIO-083STOP Digital I/O is not recovered
- SEAL-190WARN Disabling motion triggering
- SRVO-023SERVO Stop error excess
- SRVO-038SERVO Pulse mismatch
- SRVO-058SYSTEM FSSB 1 init error
- SRVO-082WARN DAL alarm(Track encoder:…)
- SRVO-157SERVO CHGAL alarm
- SYST-031SYSTEM F-ROM parity
- SYST-156SYSTEM Unknown hard ware
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →