收到同行送来的故障机壹台美的C20-SK2002电磁炉，故障表现为开机一直检锅，电流由0-5A之间变化，检查可调电阻500欧，阻值变大到1K左右，可调电阻改220欧，试机电流在8A左右，工作正常了。   |
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