中文
含义
室内盘管温度传感器故障。安装于室内机蒸发器管路表面的NTC热敏电阻信号异常，系统无法准确检测蒸发器温度，影响化霜控制和防冷风功能。
常见原因
- 传感器感温头从蒸发器翅片间的固定夹中脱落，无法准确接触管路温度
- 传感器引线在空调安装过程中被夹断或过度拉伸
- 传感器阻值漂移，在0℃时的阻值偏差超过允许范围
- 盘管传感器插头受潮氧化，接触电阻增大
- 室内机主板上对应的传感器分压电路电容漏电
自助排查
- 打开室内机面板，找到固定于蒸发器管路上的盘管传感器，检查是否安装到位
- 用手触摸传感器区域确认蒸发器实际温度与显示值是否接近
- 拔下传感器插头，测量在室温下的阻值，并与标称阻值对照
- 若测量值严重偏离（如完全开路或短路），需更换盘管温度传感器
English
Meaning
Indoor coil temperature sensor fault. The NTC thermistor mounted on the indoor unit evaporator coil pipe has abnormal signal output. The system cannot accurately detect evaporator temperature, affecting defrost control and cold-air prevention.
Common Causes
- Sensor head has come loose from its mounting clip on the evaporator fins, losing contact with the pipe temperature
- Sensor lead wire pinched or over-stretched during AC installation
- Sensor resistance drifted beyond tolerance at 0°C reference point
- Moisture corrosion on the coil sensor connector causing increased contact resistance
- Leaky capacitor in the voltage divider circuit on the indoor main board
Self-Check Steps
- Open the indoor unit panel, locate the coil sensor clipped to the evaporator pipe, and verify it is properly seated
- Touch the sensor area and compare the sensed temperature with the actual pipe temperature
- Disconnect the sensor connector and measure resistance at room temperature against the rated specification
- If the measured value is severely off (open circuit or short circuit), replace the coil temperature sensor