中文
含义
空气净化器检测到HEPA滤网和活性炭滤网的使用寿命即将耗尽或已超期，需要更换。此为定期维护提醒，表示需要进行维护。
常见原因
- 滤网累计使用时间超过建议更换周期（通常为12个月）
- 在空气质量较差的环境中使用，滤网提前饱和
- 滤网表面被大颗粒灰尘完全覆盖，透气性下降
- 滤网安装后未正确复位滤网寿命计时器
- 使用了非官方滤网，寿命计时不兼容
自助排查
- 打开前面板，取出HEPA和活性炭组合滤网
- 检查滤网颜色和灰尘堆积情况——严重变灰、变黑的滤网需要更换
- 用吸尘器低档吸除滤网表面的浮尘（仅作为临时措施）
- 更换为戴森原装新滤网后，按压复位按钮重置滤网寿命
- 如果已经更换滤网但ERR L仍显示，确认是否正确执行了滤网重置操作
English
Meaning
The air purifier has detected that the HEPA and activated carbon filter life is nearly or fully expired and needs replacement. This is a routine maintenance reminder.
Common Causes
- Cumulative filter usage time exceeds the recommended replacement interval (typically 12 months)
- Operation in poor air quality environments causing premature filter saturation
- Filter surface completely covered with coarse dust, reducing air permeability
- Filter life timer not reset after a genuine filter replacement
- Non-genuine replacement filter with incompatible life-tracking communication
Self-Check Steps
- Open the front cover and remove the HEPA + activated carbon combination filter
- Inspect filter color and dust loading — severely grayed or darkened filters require replacement
- Vacuum the filter surface on low power as a temporary measure only
- After installing a genuine Dyson replacement filter, press and hold the reset button to reset filter life
- If ERR L persists after a genuine filter replacement, verify that the filter reset procedure was completed correctly