中文
含义
康佳空调检测到室内蒸发器管温传感器异常。E2 错误代码表示室内机主板检测到蒸发器盘管温度传感器开路、短路或阻值异常。此传感器监测蒸发器的结霜和温度状态，用于控制制冷/制热运行和防冻结保护。
常见原因
- 蒸发器管温传感器本体损坏——热敏电阻开路或短路。
- 传感器感温探头从蒸发器翅片插槽中脱出，导致检测温度不准确。
- 传感器线束因蒸发器结霜融化的冷凝水浸泡导致绝缘受损或短路。
- 传感器插头引脚锈蚀或氧化，接触电阻增大。
- 室内机主板上传感器接口电路故障（分压电阻损坏或 MCU 口损坏）。
- 蒸发器严重结霜使传感器被冰层包裹，热响应严重滞后。
自助排查
- 断电重启空调，观察 E2 是否复现。
- 打开室内机面板检查蒸发器翅片是否严重结霜——如果结霜严重，先让空调自然化霜 1-2 小时后再试。
- 检查传感器探头是否插在蒸发器翅片上规定的位置，如脱落请小心插回。
- 清理蒸发器表面的灰尘污垢，确保传感器与翅片良好接触。
- 如无法解决，请联系康佳售后上门检修更换蒸发器传感器。
English
Meaning
The Konka air conditioner has detected an abnormal indoor evaporator coil temperature sensor. Error code E2 indicates that the indoor main board has detected an open circuit, short circuit, or abnormal resistance on the evaporator pipe temperature sensor. This sensor monitors the evaporator’s frost and temperature status for cooling/heating control and freeze protection.
Common Causes
- The evaporator pipe temperature sensor itself is damaged — NTC thermistor is open or shorted.
- The sensor probe has come loose from its slot in the evaporator fins, causing inaccurate readings.
- The sensor wiring insulation is damaged or shorted due to soaking in condensate water from defrosting.
- Corroded or oxidized sensor connector pins, increasing contact resistance.
- Faulty sensor interface circuit on the indoor main board (damaged voltage divider resistor or MCU port).
- Severe evaporator frosting has wrapped the sensor in ice, severely delaying thermal response.
Self-Check Steps
- Power cycle the AC and observe whether E2 reappears.
- Open the indoor unit panel and check the evaporator fins for heavy frost — if severely frosted, allow the AC to naturally defrost for 1-2 hours before retrying.
- Check whether the sensor probe is correctly inserted into the designated slot on the evaporator fins. Gently reinsert if dislodged.
- Clean dust and dirt from the evaporator surface to ensure good thermal contact between sensor and fins.
- If the issue persists, contact Konka after-sales service for on-site evaporator sensor replacement.