中文
含义
E2表示空调室内盘管温度传感器（管温NTC）出现故障。该传感器安装在室内机换热器盘管上，用于检测盘管温度，在制冷时防止盘管结冰、制热时防止过热。
常见原因
- 传感器引线断裂或插头松脱。
- 传感器金属探头从盘管插孔中脱出，无法准确测温。
- 传感器NTC元件老化，阻值偏移。
- 线束在长期高低温交变环境中老化龟裂。
- 主控板检测电路故障。
自助排查
- 关闭空调电源，等待5分钟后重新上电。
- 打开室内机面板，找到安装在盘管弯头处的管温传感器。
- 检查传感器探头是否牢固插入盘管插孔中。
- 用万用表测量传感器阻值，对照阻值表判断是否正常。
- 若损坏需更换，请联系售后。
English
Meaning
E2 indicates an indoor coil pipe temperature sensor (coil NTC) fault. This sensor is mounted on the indoor unit heat exchanger coil to detect coil temperature — preventing coil freezing during cooling and overheat during heating.
Common Causes
- The sensor lead wire is broken or the connector is detached.
- The sensor probe has come out of the coil insertion hole, preventing accurate temperature measurement.
- The NTC element has aged and the resistance has drifted.
- The wiring harness has aged and cracked from long-term high/low temperature cycling.
- The main control board detection circuit is faulty.
Self-Check Steps
- Turn off the A/C power, wait 5 minutes, then restart.
- Open the indoor unit panel and find the coil sensor mounted on the coil bends.
- Check that the sensor probe is firmly inserted into the coil hole.
- Use a multimeter to measure the sensor resistance and compare with the resistance table.
- If damaged, replace the sensor — contact service.