Huainan Wan Tai double fan switch start-up fault treatment list shows that it can't start normally.

1. First of all, the fixing bolt of the switch of Huainan Wan Tai double fan is loose, and the rotation operation is frequent, and the wire is easy to be loosened due to pressure welding, which leads to discharge, ablation or open circuit of the external connection point. At this time, the fixing bolts should be tightened to appropriately reduce the number of operations.

2. Secondly, the torsion spring on the rotating shaft inside the switch is soft or broken, which makes the moving contact unable to rotate and causes the contact position to change. At this time, the spring should be replaced.

3. Finally, the contact between the moving and static contacts in the switch is poor, or the rated current of the switch is less than the current of the load circuit, which leads to arcing and ablation of the internal contacts. In this case, the moving and static contacts should be adjusted, or the switch with higher current should be replaced. After the above operations are completed, the phenomenon that the double fan switch in Huainan Wan Tai cannot be started normally can be recovered.