中文
含义
IPM（智能功率模块）保护——变频压缩机驱动模块故障，通常伴随过流、过温或欠压。
常见原因
- IPM 模块内部功率管击穿或短路
- 压缩机绕组绝缘不良导致驱动电流异常
- 直流母线电压过高或过低
- IPM 散热不良导致模块过热
- 驱动信号异常（光电耦合器或隔离电源故障）
- 模块焊接不良或老化失效
自助排查
- 断电后等待 10 分钟让母线电容放电完毕
- 检查 IPM 模块散热片是否清洁、导热硅脂是否干涸
- 用万用表测量压缩机三相绕组阻值是否平衡
- 确认直流母线电压是否在正常范围（约 310V 或视变频方案而定）
- 以上无效需更换 IPM 模块或整个变频驱动板
English
Meaning
IPM (Intelligent Power Module) protection — inverter compressor driver module fault, typically accompanied by overcurrent, overtemperature, or undervoltage.
Common Causes
- Blown or shorted power transistors inside the IPM module
- Poor compressor winding insulation causing abnormal drive current
- DC bus voltage too high or too low
- Poor IPM heat dissipation leading to module overtemperature
- Abnormal drive signals (optocoupler or isolated power supply failure)
- Cold solder joints or aged module
Self-Check Steps
- Power off and wait 10 minutes for the DC bus capacitors to discharge
- Check the IPM heatsink for cleanliness and the thermal paste for drying
- Measure the three-phase compressor winding resistance for balance
- Verify the DC bus voltage is within normal range (approximately 310V depending on inverter design)
- If the error persists, replace the IPM module or the entire inverter drive board