Code V50-003: Smart Safety Observation Warning
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Smart Safety Observation Warning alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
When turning ON the SBT start signal (SBTSTEXm / SBTSTMOm), the test start condition are not met. Displays the factor why the brake test start is impossible * When there are multiple factors, the smaller item is shown. 0001: part systems in automatic operation 0002: not in in-position 0003: in servo OFF state. 0004: in current limit 0005: the secondary axis in the synchronous control 0006: in superimposition control 0007: in arbitrary axis exchange control 0008: in mixed control 0009: Parameter for SBT error 000A: reference position establishment incomplete 000B: applies exclusive control of SBT 000C: the secondary axis SBT disabled 000D: the secondary axis SBT start disabled 000E: the secondary axis in single method Remedy Check the start-enabled condition of the brake test. Eliminate the caus e of the alarm, then enable the SBT start signal to start the brake test. SBT warning 1 0002 Axis name
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mitsubishi M800/M80 CNC Alarms
Mitsubishi controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code V50-003 on the M800/M80 CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mitsubishi's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 722 Mitsubishi M800/M80 CNC codes.
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