Harrington Hoists and Cranes Series 3 End Truck - Manual (Page 50)

Table 8-1 Troubleshooting Guide
Trouble Cause Remedy
The rectifier is damaged. Replace the rectifier.
Electrical shock The crane is not properly grounded. Ground parts where necessary.
The travel surface on the bridge
beam or runway is coated with oil,
grease, paint, or corrosion. Remove foreign material from travel
surface or add ground conductor for
hoist power.
Water or foreign matter has
penetrated the electric parts. Dry parts and remove any foreign
matter where necessary.
The crane accelerates too
slowly. The electronic soft start’s torque
volume is adjusted too low. Increase torque volume.
The electronic soft start’s timer is
adjusted too low. Decrease the timer setting.
The crane accelerates too
rapidly. The electronic soft start’s timer is
adjusted too low. Increase the timer setting.
Stopping distance is too long. Brake torque is too low. Adjust the brake torque to a higher
setting.
Brake parts are worn. Replace parts where necessary.
Stopping distance is too short. Brake torque is too high. Adjust the brake torque to a lower
setting.
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