中文
含义
室内盘管温度传感器故障。检测室内蒸发器管温的热敏电阻异常，可能导致防冻结保护误动作、制热过载保护误动作或室外机运行逻辑紊乱。
常见原因
- 管温热敏电阻开路、短路或阻值漂移
- 传感器探头未完全插入盘管感温套管，接触不良
- 传感器线束在室内机接线端子处松动
- 盘管传感器安装孔内积水或锈蚀
- 传感器型号不匹配导致分压系数错误
自助排查
- 断电后测量管温传感器阻值并与温度对照，25℃时阻值约5kΩ-15kΩ依型号而定
- 检查传感器探头是否完全插入铜管感温套管中
- 清洁传感器插头和插座触点
- 按原型号更换管温传感器
English
Meaning
Indoor coil temperature sensor failure. The indoor evaporator pipe thermistor is abnormal, potentially causing false anti-freeze protection, false overheat protection, or outdoor unit operation logic errors.
Common Causes
- Open, shorted, or drifted pipe thermistor resistance
- Sensor probe not fully inserted into the copper tube temperature well
- Loose sensor wire terminal connections inside the indoor unit
- Water ingress or corrosion in the sensor well hole
- Wrong sensor model installed, causing incorrect voltage divider ratio
Self-Check Steps
- Power off, measure pipe thermistor resistance and compare to the temperature chart (typically 5-15kΩ at 25°C)
- Verify the probe is fully seated in the copper tube temperature well
- Clean sensor connector contacts
- Replace with the correct pipe temperature sensor matching your model