Points for attention of grab crane operation：
1. before the power supply, check the controller should be parked at zero, the switch position is correct. The switch on the control cabinet is closed and the door is closed.
2. according to the power button, power supply, observe the electrical components are abnormal phenomenon, determine the error can be operated behind the institutions.
3. lifting mechanism and big car control are controlled by the controller, and the operation requirements are the same as the ordinary crane.
4. the brake of hoisting mechanism should be checked every class, the brake of the running mechanism should be checked 2-3 days, and the problems should be adjusted and repaired in time.