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When the motor part of the submersible acid pump fails, it should be repaired according to the following methods: 1. There is no response after turning on the power. Most are caused by the short circuit of the power plug, the power lead and the motor winding.​​ 2. It is difficult to start or cannot be started, and it is accompanied by a "humming" sound. During maintenance, you can use a small bamboo piece to quickly turn the fan blade according to the running direction. If the motor runs quickly, it means that the startin... more