中文
含义
PFC（功率因数校正）保护——PFC 电路电压异常或模块过流，系统停机保护。
常见原因
- 电网电压波动过大超出 PFC 调整范围
- PFC 电感或整流桥损坏
- PFC 功率管（IGBT/MOSFET）击穿
- PFC 控制芯片或驱动电路故障
- 母线电解电容老化容量下降
- 负载突变导致 PFC 过流
自助排查
- 用万用表检测电源电压是否在 220V±15% 范围内
- 断电后检查 PFC 电感外观有无烧焦或异味
- 检查主控板上的电解电容有无鼓包或漏液
- 多次出现此故障时，需更换 PFC 模块或主控板
- 建议加装稳压器以改善供电质量
English
Meaning
PFC (Power Factor Correction) protection triggered — abnormal PFC circuit voltage or module overcurrent. System shuts down for protection.
Common Causes
- Grid voltage fluctuations exceeding the PFC adjustment range
- Damaged PFC inductor or rectifier bridge
- Blown PFC power transistor (IGBT/MOSFET)
- Faulty PFC controller IC or gate drive circuit
- Aged DC bus electrolytic capacitors with reduced capacitance
- Abrupt load changes causing PFC overcurrent
Self-Check Steps
- Measure the supply voltage to verify it is within 220V±15%
- Power off and inspect the PFC inductor for burn marks or odor
- Check electrolytic capacitors on the mainboard for bulging or leakage
- If the error recurs, replace the PFC module or main control board
- Consider installing a voltage stabilizer to improve power quality