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大金空调出现jr是什么故障

答：检查外机电源是不是有电或者电压是不是达到额定电压。如果不是电压低的原因就请检查室内、外机连接是否接对，导线是否老化，室内机主板接线是否正确，否则更换内机主板。

大金多联机报jr是什么故障

无法确定具体故障，需进一步排查。因为“大金多联机报jr”可能是一个错误代码或者故障信息，不同的“jr”可能对应着不同的故障原因，需要根据具体情况进行进一步的分析和诊断。建议联系专业的机电维修人员或者有关厂家进行咨询和更进一步的操作。