解决方法:先判断是控制故障还是系统故障,可先断开室内机主板到室外压缩机的控制线COMP,如果室内机运行正常,可确定室内机主板或显示板没问题,故障为系统漏氟、堵塞或排空不良,可通过压力判断。
系统缺氟(冬季制热需要1.6到2.1MPa的压力,如果制冷剂不足会导致压缩机工作加剧,管温过热、从而显示E4)。系统脏堵或者散热不好,建议清洗内机过滤网和外机冷凝器。
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