中文
含义
空气净化器滤芯寿命到期。E4 表示滤芯使用时间已达到设计寿命，需要更换新的滤芯。这是正常提示，净化器仍可继续使用，但过滤效果会随时间下降。
常见原因
- 滤芯达到或超过预定更换周期（通常为 6–12 个月，视使用环境而定）。
- 机器安装后未正确重置滤芯计时器，导致提前或延迟报警。
- 更换滤芯后未进行计时复位操作。
- 空气质量极差的环境（如装修后、重度雾霾地区）导致滤芯提前饱和。
- 滤芯计时器的计时芯片计数错误。
- 滤芯密封条破损导致泄漏，提前失效。
自助排查
- 取出旧滤芯，检查外观——若滤芯表面严重发黑、积尘或异味明显，应更换新滤芯。
- 购买与机型匹配的原装滤芯进行更换。
- 更换滤芯后，长按机器的”复位”按键（通常在控制面板上，或长按”模式”键 3–5 秒），将滤芯寿命计时归零。
- 即使 E4 报警，滤芯实际可能仍有富余寿命——如果你清楚滤芯更换不久，可以手动复位后继续使用，注意观察过滤效果。
- 定期检查滤芯状态（建议每 1–2 个月取出用吸尘器清理预过滤层），可以延长滤芯使用寿命。
English
Meaning
The filter life has expired. E4 indicates the filter has reached its designed service life and needs replacement. This is a normal reminder — the purifier can still operate, but filtration performance will degrade over time.
Common Causes
- The filter has reached or exceeded the scheduled replacement cycle (typically 6–12 months, depending on usage environment).
- The filter timer was not correctly reset after installation, causing premature or delayed alarm.
- The timer was not reset after replacing the filter.
- Extremely poor air quality environments (e.g., post-renovation, heavy smog areas) causing the filter to saturate earlier than expected.
- The filter timer chip counting is erroneous.
- The filter seal strip is damaged, causing leakage and premature failure.
Self-Check Steps
- Remove the old filter and inspect its appearance — if the surface is heavily darkened, heavily dust-laden, or has a noticeable odor, replace with a new filter.
- Purchase a genuine replacement filter matching your purifier model.
- After replacing the filter, press and hold the “Reset” button on the control panel (or long-press the “Mode” button for 3–5 seconds) to reset the filter life timer to zero.
- Even if E4 is displayed, the filter may still have remaining useful life — if you know the filter was recently replaced, you can manually reset and continue using it while monitoring filtration performance.
- Periodically inspect the filter (remove and vacuum the pre-filter layer every 1–2 months recommended) to extend overall filter life.