中文
含义
E2 为室内蒸发器盘管温度传感器故障。该传感器检测室内机换热器表面温度，用于防冻结保护和制冷制热控制，传感器异常会导致制冷效果差或频繁停机。
常见原因
- 盘管传感器热敏电阻开路或短路
- 传感器与控制板连接端子松脱
- 传感器探头未正确插入盘管翅片
- 传感器线束被老鼠咬断
- 控制板 A/D 采样通道故障
自助排查
- 断电后打开室内机面板，找到盘管温度传感器（通常为黑色或灰色探头插入翅片）。
- 检查传感器探头是否脱离翅片，重新插入正确位置。
- 检查传感器线束是否完整，有无被老鼠啃咬痕迹。
- 用万用表测量传感器阻值，与标准对照表比对是否正常。
- 若传感器损坏，更换同型号盘管传感器，安装时确保探头与翅片紧密接触。
English
Meaning
Indoor evaporator coil temperature sensor fault. This sensor detects the indoor heat exchanger surface temperature and is used for anti-freeze protection and cooling/heating control.
Common Causes
- Coil sensor thermistor open or short circuit
- Sensor connection terminal to control board loose
- Sensor probe not properly inserted into coil fins
- Sensor wiring harness chewed through by rodents
- Control board A/D sampling channel fault
Self-Check Steps
- Power off, open the indoor unit panel, and locate the coil temperature sensor (typically a black or gray probe inserted into the fins).
- Check whether the sensor probe has detached from the fins; reinsert into the correct position.
- Check the sensor wiring harness for damage or rodent bite marks.
- Use a multimeter to measure the sensor resistance and compare against the standard temperature-resistance table.
- If the sensor is damaged, replace with the same type and ensure the probe makes firm contact with the coil fins.