中文
含义
温度传感器（NTC）开路报警。主控读取到NTC温度传感器的电阻值无穷大（超出最高检测范围），判断传感器处于开路状态。
常见原因
- NTC热敏电阻引脚断裂或焊点脱落
- 传感器连接线被老鼠咬断或老化断裂
- NTC元件本身烧毁失效（开路）
- 接插件松动或氧化导致接触不良
- 主板上NTC检测电路电阻分压网络故障
自助排查
- 断电重启，若偶尔出现且能恢复可能是接触不良
- 检查NTC传感器插头是否松动，重新插拔紧固
- 用万用表电阻档测量NTC两端阻值（25°C时通常10kΩ或100kΩ），若无穷大则传感器已开路
- 若阻值正常但依旧报错，检查主板NTC接口是否有腐蚀或氧化
- 确认为传感器损坏时，需更换同规格NTC热敏电阻
English
Meaning
Temperature sensor (NTC) open circuit alarm. The main control reads infinite resistance from the NTC sensor — beyond the maximum detection range — indicating an open circuit condition.
Common Causes
- Broken NTC thermistor leads or desoldered pads
- Sensor wires chewed by rodents or cracked due to aging
- Burned-out NTC element (open circuit failure)
- Loose or oxidized connector causing poor contact
- Faulty resistor divider network in the NTC detection circuit on the mainboard
Self-Check Steps
- Power cycle the unit — intermittent errors may indicate a loose connection rather than permanent failure
- Check the NTC sensor connector; reseat and tighten it
- Measure NTC resistance with a multimeter (typically 10kΩ or 100kΩ at 25°C); infinite reading confirms an open circuit
- If resistance is normal but the error persists, inspect the NTC header on the mainboard for corrosion or oxidation
- Replace the NTC thermistor with the same specification if confirmed defective