10 - 夏普 空调

中文

含义

PFC（功率因数校正）保护故障。室外机PFC电路工作异常，通常由电网谐波干扰、PFC模块过流或驱动电路故障引起，导致空调无法正常运行。

常见原因

1. PFC升压IGBT/MOSFET击穿或开路
2. PFC电感磁芯饱和或线圈匝间短路
3. 电网电压剧烈波动或谐波含量过高
4. PFC控制芯片供电异常或驱动信号丢失
5. PFC输出大电解电容容量下降或ESR增大

自助排查

1. 关闭空调并等待5分钟后重新启动，排除瞬时干扰
2. 检查供电电压是否稳定，尝试不同时段运行
3. 避免与大功率感性设备（如电焊机）共用线路
4. 如频繁出现，需专业人员检修PFC电路板和模块

English

Meaning

PFC (Power Factor Correction) protection fault. The outdoor unit PFC circuit is abnormal, typically caused by grid harmonics, PFC module overcurrent, or drive circuit failure, preventing normal AC operation.

Common Causes

1. Shorted or open PFC boost IGBT / MOSFET
2. Saturated PFC inductor core or inter-turn short circuit in the coil
3. Severe grid voltage fluctuation or excessive harmonic distortion
4. Abnormal PFC controller IC supply voltage or missing gate drive signal
5. Degraded bulk PFC output capacitor with reduced capacitance or increased ESR

Self-Check Steps

1. Power off the AC for 5 minutes then restart to rule out transient interference
2. Check that the supply voltage is stable; try operating at different times of day
3. Avoid sharing the circuit with high-power inductive loads (e.g. welders)
4. If the fault recurs frequently, professional PFC board diagnosis is required