中文
含义
室外盘管温度传感器故障。安装于室外机冷凝器管路上的NTC热敏电阻信号异常，系统无法准确检测冷凝温度，影响压力控制和化霜进入/退出判断。
常见原因
- 室外机长期日晒雨淋，传感器引线绝缘层老化开裂
- 传感器固定位置偏移，未能真实反映冷凝器中部温度
- NTC传感器因雷击或其他浪涌损坏
- 传感器插头接触不良，信号间歇性中断
- 室外机传感器线束中间接头处进水腐蚀
自助排查
- 检查室外机冷凝器盘管上的传感器是否固定在指定位置
- 使用万用表测量传感器阻值，与当前气温下应显示的阻值对比
- 检查传感器线束沿途有无破损、裸露或动物咬痕
- 若传感器损坏，需更换同规格盘管传感器（通常是10kΩ或50kΩ B值3950）
English
Meaning
Outdoor coil temperature sensor fault. The NTC thermistor mounted on the outdoor condenser coil pipe has abnormal signal output. The system cannot accurately detect condensing temperature, affecting pressure control and defrost cycle entry/exit decisions.
Common Causes
- Outdoor unit exposed to sun and rain — sensor lead wire insulation cracked from UV and weathering
- Sensor mounting position shifted, no longer reflecting the true condenser midpoint temperature
- NTC sensor damaged by lightning strike or power surge
- Loose sensor connector causing intermittent signal dropout
- Water ingress and corrosion at mid-cable splice joints in the outdoor wiring harness
Self-Check Steps
- Verify the outdoor coil sensor is secured at its designated position on the condenser piping
- Measure the sensor resistance with a multimeter and compare with the expected value at current ambient temperature
- Inspect the sensor cable along its entire length for damage, exposed wire, or rodent bites
- If the sensor is damaged, replace with an identical specification sensor (typically 10kΩ or 50kΩ B=3950)