中文
含义
洗衣机输入电源电压过低。E9 表示洗衣机电源检测电路测量到交流输入电压低于 ~175V 的安全下限。电压过低会导致电机启动困难、电流过大、加热功率不足，系统触发保护并停止运行。
常见原因
- 电网供电电压本身偏低——老旧小区或偏远地区供电线路末端。
- 家庭内部线路过长、线径过细导致电压降过大。
- 同一电路中并联了多台大功率电器（空调、电热水器等），分压导致电压下降。
- 空调等大功率设备启动瞬间产生电压暂降，被检测电路捕获。
- 洗衣机进线松动、插座接触不良导致接触电阻增大。
- 配电箱中该回路空气开关老化接触不良。
自助排查
- 用万用表交流电压档测量洗衣机插座的电压——正常应在 198V–242V（220V±10%）之间。若持续低于 180V 说明供电异常。
- 断开该回路上其他大功率电器，单独为洗衣机供电，观察 E9 是否消失。
- 检查插座是否松动、插座内铜片是否弹性不足——用手感试插头插入后的松紧度。
- 检查配电箱中该回路漏电开关或空气开关是否发热或触点氧化。
- 若家中长期电压偏低，建议请电工检测入户电压并增容；或购置自动稳压器（AVR）为洗衣机稳压供电。
- 如果电压正常但洗衣机仍报 E9，可能是主板电压检测电路故障，联系 TCL 售后检修。
English
Meaning
The input supply voltage is too low. E9 indicates the washer’s voltage detection circuit has measured the AC input voltage below the ~175V safety lower limit. Low voltage causes difficult motor startup, excessive current draw, and insufficient heating power. The system triggers protection and stops operation.
Common Causes
- Inherently low grid supply voltage — old residential areas or locations at the end of supply lines.
- Overly long or too-thin household wiring causing excessive voltage drop.
- Multiple high-power appliances (AC, water heater, etc.) on the same circuit drawing voltage down in parallel.
- Momentary voltage sag from starting a high-power device (e.g., air conditioner) being captured by the detection circuit.
- Loose washer power cord connection or poor socket contact causing increased contact resistance.
- The circuit breaker in the distribution panel for this circuit is aged with poor contact.
Self-Check Steps
- Use a multimeter in AC voltage mode to measure the outlet voltage — normal is 198V–242V (220V±10%). A sustained reading below 180V indicates an abnormal supply.
- Disconnect other high-power appliances on the same circuit and run the washer alone; check whether E9 clears.
- Check the socket for looseness — feel the insertion resistance of the plug to determine whether the socket’s copper contacts have lost their spring tension.
- Check the RCD or MCB for this circuit in the distribution panel for signs of heating or oxidized contacts.
- If the home has chronically low voltage, have an electrician check the incoming service and consider upgrading capacity, or purchase an AVR to provide regulated power.
- If voltage is normal but the washer still reports E9, the main board’s voltage detection circuit may be faulty. Contact TCL after-sales for inspection.