Common Problems and Solutions: 1. Chain Jammed Reasons: Lack of oil, chain plate deformation, foreign objects entering the interior. Treatment: Clean and lubricate the chain, check if deformed links need to be replaced. 2. Chain Slip Reasons: Excessive wear on the chain or failure of the internal ratchet mechanism in the hoist. Treatment: Replace the chain and inspect the transmission components of the hoist. 3. Chain Breakage Reasons: Overloading use, aging of the chain, or hidden damage present. Treatment: Prohibit further use and immediately replace the entire chain!