代码 433: n AXIS: CNV. LOW VOLT DC LINK
问题描述与安全警告
Fanuc 16i/18i/21i CNC 触发了严重的 n AXIS: CNV. LOW VOLT DC LINK 警报。需要由合格的操作员或维修技师立即处理，以防止在制造周期中对设备造成二次损坏或导致零件报废。在接触电气控制箱之前，请务必确保遵循标准安全和停机挂牌 (LOTO) 程序。
官方故障排除步骤
1) PSM: The DC link voltage has dropped. 2) PSMR: The DC link voltage has dropped. 3) α series SVU: The DC link voltage has dropped. 4) β series SVU: The DC link voltage has dropped.
Source: Fanuc Series 16i/18i/21i-B Operator's Manual, Appendix G Alarm List (B-63864EN/03)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
关于 Fanuc 16i/18i/21i CNC 警报
由 Fanuc 制造的工业控制器具有广泛的诊断系统，用于保护内部电路和机械连杆。当 16i/18i/21i CNC 出现类似 433 的错误代码时，通常表示指令值与实际传感器反馈之间存在不匹配。
完整报警清单: 360 Fanuc 16i/18i/21i CNC 代码s.
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