When the freezing indicator light is on, the compressor will not function but the pump still works.

冻结指示灯亮，压缩机无法启动，泵正常运转。

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ECU supervise the system function, light the fault indicator to alert driver when any error.

ECU对系统的功能进行监控，如果发现故障，将点亮系统故障指示灯，提示驾驶员系统有故障。

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Compare function, free to set upper and lower deviation, red and green indicator light and buzzer sound and light alarm settings automatically;

比较功能，上下限偏差值自由设定，红绿指示灯及蜂鸣器自动声光报警设置；

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