1. Never increase the staff or drag the chain. The last thing that should be done in all operations to pull the chain hoist is to suddenly increase the pull force or call more staff to pull the chain together. This operation is wrong, not only will cause greater damage to the equipment, but will also cause harm to the staff. This may be a chain jamming or chain blocked.
2. Check whether the chain hoist is overloaded.
3. Examine every part of the equipment carefully. As long as the user does the first two steps, the overall security has been greatly guaranteed. However, the overall performance of the equipment is checked to find the cause of the failure.