力士乐伺服驱动器维修电话：
f873含义：power supply driver stage fault电源驱动器级故障
description:说明：
the voltage supply of the driver stage is monitored and if the voltage is
too low then the drive is turned off.监测驱动器级的电压供应，如果电压过低，则关闭驱动器。
cause:原因：
voltage supply of the driver stage is too low
驱动器级的电源电压过低
remedy:补救措施：
exchange drive controller
更换驱动器。