After reaching the rated speed, a potential-free contact (compressor running) is required for control system. The contact must be closed in this state.
当达到额定转速后，控制系统需要一个无压降连接(压缩机运行)，在这种状态下接触器必须闭合。
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Designed to: Keep your PC safe, error-free, and running at top speed.