The electrical control system of a Macgregor crane is relatively complicated. Once an
electrical fault occurs in use, it will cause the crane to fail work properly and delay a
ship’s schedule. On the basis of a brief introduction to the electrical control system and in
combination with the successful experience of solving the fault of electrical equipment
onboard a ship, it analyzes the causes, diagnostic ideas and troubleshooting for the common
startup loop faults, power faults, limit loop faults and handle’s logic faults in the control
system, which provides certain reference for common fault diagnosis and troubleshooting of
Macgregor crane’s electric control system.