西门子NCU控制器数码管不亮(数控十年修复技术)；西门子840D NCU出现的故障为上电之后数码管无显示，数码管显示“1”,数码管显示“3”，数码管显示“8”，数码管走“106”和“109”等。如果NCU出现上述报警均属于NCU有故障，需要进行修理，NCU正常状态为数码管显示“6”和两个绿灯亮才属正常。

西门子NCU控制器数码管不亮；恒税电气维修西门子840D、840D sl、810D数控系统NCU/CCU数控单元常见故障：7段码指示灯无显示，自检不过，LED灯显示2，数码管不亮，自检不过，上电死机，数码管显示1，数码管数字一直跳换闪烁维修，H1、H2全亮，7段码显示8，7段码数字翻转数据不能总清，NCU板子循环显示A025，840D床子NCU显示1，西门子NCU板子故障码3，电池、控制器使能不上，CCU轴模块无使能信号，风扇故障，数据不能保持，接口故障，与PLC链接不上，NCU与机床无法通讯，NCU板子通讯不上，数码管数字不停闪维修，NCU报警，NCU不正常等等故障维修。

西门子NCU控制器数码管不亮修复型号；

NCU 571.3 6FC5357-0BB13-0AA1

NCU 571.4 6FC5357-0BB14-0AA0

NCU 571.4 6FC5357-0BB12-0AE0

NCU 571.5 6FC5357-0BB15-0AA0

NCU 572.2 6FC5357-0BB21-0AE0

NCU 572.2 6FC5357-0BB21-0AE1

NCU 572.2 6FC5357-0BB52-0AE0

NCU 572.3 6FC5357-0BB22-0AE0

NCU 572.3 6FC5357-0BB23-0AA0

NCU 572.3 6FC5357-0BB23-0AA1

NCU 572.4 6FC5357-0BB23-0AE0

NCU 572.4 6FC5357-0BB24-0AA0

NCU 572.5 6FC5357-0BB25-0AA0

NCU 573.2 6FC5357-0BB31-0AE0

NCU 573.2 6FC5357-0BB33-0AE0

NCU 573.2 6FC5357-0BB33-0AE1

NCU 573.2 6FC5357-0BB53-0AE1

NCU 573.3 6FC5357-0BB33-0AE2

NCU 573.3 6FC5357-0BB33-0AE3

NCU 573.3 6FC5357-0BB33-0AA0

NCU 573.3 6FC5357-0BB33-0AA1

NCU 573.4 6FC5357-0BB34-0AA0

NCU 573.4 6FC5357-0BB34-0AE0

NCU 573.4 6FC5357-0BB34-0AE1

NCU 573.5 6FC5357-0BB35-0AA0

NCU 573.5 6FC5357-0BB35-0AE0