(1)用询问分割法确定电气故障部位即通过询问现场操控人员,了解总控系统、起升系统、回转系统、变幅系统、大车行走系统等各部运转情况,分清主次,排除一部分疑点,找出可能有故障的系统。(2)用观察、弹压、敲击法排除明显的电气故障 (1) To determine the location of electrical faults by asking and dividing method, to understand the operation of all control systems such as master control system, hoisting system, slewing system, luffing system and trolley walking system, and to distinguish between the primary and the secondary, to exclude some doubts , Find out the system that may have trouble. (2) With the observation, bomb pressure, knocking law to rule out significant electrical failure