中文
含义
室外盘管温度传感器故障。室外冷凝器/蒸发器管温热敏电阻异常，影响系统除霜控制、制冷/制热模式切换及高压保护逻辑判断。
常见原因
- 室外管温热敏电阻开路或短路
- 传感器线束被老鼠咬断或老化脆裂
- 室外机接线端子腐蚀导致接触电阻增大
- 探头位置脱离铜管导致检测温度偏差
- 雷击或浪涌损坏传感器及其分压电路
自助排查
- 断电后打开室外机电控盒，测量管温传感器阻值
- 检查传感器到主板线束有无断裂、破损
- 确认传感器探头紧贴铜管并用金属夹固定良好
- 更换同规格室外管温传感器
English
Meaning
Outdoor coil temperature sensor failure. The outdoor condenser/evaporator pipe thermistor is abnormal, affecting defrost cycle control, cooling/heating mode switching, and high-pressure protection logic.
Common Causes
- Open or short-circuited outdoor pipe thermistor
- Sensor harness chewed by rodents or cracked from weather exposure
- Corroded outdoor unit terminal block increasing contact resistance
- Sensor probe detached from the copper tube causing inaccurate readings
- Lightning surge damage to the sensor or its voltage divider circuit
Self-Check Steps
- Power off, open the outdoor unit electrical box, and measure the pipe thermistor resistance
- Inspect the sensor wiring harness for breaks or damage
- Confirm the sensor probe is firmly attached to the copper tube with its metal clip
- Replace with the correct outdoor pipe temperature sensor specification