中文
含义
室内风扇电机故障。与H11不同，此代码针对的是直流无刷室内风扇电机的驱动控制异常，而非纯粹的机械锁定。系统检测到电机驱动电流波形或转速反馈异常。
常见原因
- 直流无刷电机驱动IC过热或损坏，电机无法正常换向
- 电机与主板之间的连接排线接触不良或插针氧化
- 主板上风机驱动电路的MOS管或驱动芯片损坏
- 电机内部位置传感器（霍尔IC）失效，造成换相时序错乱
- 电机输出功率不足，风速档位切换时转速波动大
自助排查
- 断开电源后重新插拔室内风扇电机的连接排线，确保接触良好
- 上电后切换到送风模式，听电机是否有启动声但卡住
- 使用万用表测量电机供电电压是否正常（通常为DC 12V或310V）
- 若驱动板和电机接触正常但仍报错，需更换电机总成或室内主板
English
Meaning
Indoor fan motor fault. Unlike H11 (mechanical lock), this code indicates a drive control anomaly with the DC brushless indoor fan motor. The system detects abnormal motor drive current waveform or speed feedback.
Common Causes
- Overheated or damaged DC brushless motor driver IC failing to commutate the motor
- Loose or oxidized connector pins between the motor and main board ribbon cable
- Damaged MOSFET or driver chip on the main board fan drive circuit
- Failed Hall-effect position sensor inside the motor causing incorrect commutation timing
- Insufficient motor output power with large speed fluctuations when switching fan speeds
Self-Check Steps
- Power off and reseat the indoor fan motor connector to ensure good contact
- Power on and switch to fan-only mode — listen for the motor attempting to start but stalling
- Measure motor supply voltage with a multimeter (typically DC 12V or 310V)
- If the connector is properly seated and the fault persists, replace the motor assembly or indoor main board