[格力空调维修] 第1章-基础知识和故障代码-第2节-故障代码

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第2节 故障代码

一、显示方式

故障代码显示方式见图1-5。

① 只设有显示屏的空调器(常见于早期柜式空调器),将直接显示故障代码。例:制冷系统高压保护将直接显示E1。

② 只设有指示灯的空调器(常见于早期挂式空调器),故障代码以指示灯的闪烁次数表示,每个显示周期间隔3s。例:制冷系统高压保护,运行指示灯灭3s闪1次。

③ 同时设有显示屏和指示灯的空调器(常见于目前的挂式或柜机空调器),显示屏和指示灯将同时指示故障代码。例:制冷系统高压保护,显示屏显示E1代码,同时运行指示灯灭3s闪1次。

图1-5 故障代码显示方式

图1-5 故障代码显示方式

二、故障代码特点

故障代码根据电控系统电路设计所决定。电路设计不同,即使是相同的故障现象,显示的故障代码也不相同,在使用代码检修空调器故障时,应根据电路设计特点,才能迅速地检查到故障根源。例如,压缩机由于某种原因导致启动不起来(卡缸),即启动电流很大,根据电路设计特点可表现出以下3种状况。

① 目前单相供电的1P或1 .5P挂式空调器,见图1-6(a),室内机主板未设电流检测电路,因此不报故障代码,室内机主板一直为室外机供电,室外风机一直运行,压缩机根据外置或内置过载保护器的导通与断开,表现为时而启动、时而停止。

② 单相供电的2P或3P柜式空调器,见图1-6(b),室内机主板设有电流检测电路,室内机主板刚向室外机供电,即压缩机一启动运行,显示板CPU检测到电流过大,立即停止压缩机和室外机供电,3min后再次供电,如显示板CPU连续5次检测电流过大时,约15min后室内机主板停止向室外机供电,并显示E5代码。

③ 三相供电的5P柜式空调器,见图1-6(c),电流检测电路串接在高压保护回路,当室内机主板控制压缩机启动,由于电流过大,电流检测板继电器触点断开,高压保护回路断开,显示板CPU检测后立即停止室外机供电,同时屏蔽遥控器和按键信号,并显示E1代码。

图1-6 电控系统特点

图1-6 电控系统特点

三、故障代码含义

挂式空调器和柜式空调器常见故障见表1-2,综合故障代码见表1-3和表1-4。

表1-2 常见故障

表1-2 常见故障

 

表1-3 综合故障代码

表1-3 综合故障代码

 

表1-4 综合故障代码(续)

表1-4 综合故障代码(续)


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