Problem Explanation：
1. Poor sensitivity and slow reaction: the PM2.5 value is kept at a relatively high value for a long time, and think that the purifier has poor purification capacity.
(a) Check the working gear of the home purifier. If the PM2.5 value is high, the purifier should be turned on to the favorite or automatic gear. The higher the gear, the faster the fan will turn, and the stronger the purification capacity will be.
(b) The larger the room area, the longer the purification time will be;
(c) The poor sealing of the room and the continuous flow of polluted air into the room will affect the ideal purification effect of the purifier. When the pollution source entering the room is greater than the purification CADR value of the purifier, the purifier will always operate at a high speed.
(d) Indoor pollution sources (such as ultrasonic humidifier, smoking, room dust, shaking clothes, etc.) will be detected by the laser sensor on the purifier.
2. Large range of variation: When there is no obvious change in the home space, PM2.5 value keeps rising and reducing;
PM2.5 particles is naked eye cannot see, only through a sensor (laser, infrared, etc.) can only be detected, when shown on the purifier of PM2.5 in the jump, may be a pollution sensors detect the indoor air flow, such as: to the sensor to huff, gas are invisible to the eye, but it will disturb the flow of air, sensors detect the particles floating in the air pollution readings will be a high (if purifier running in automatic transmission, fan RPM increases, voice).
3. Perceived high PM2.5 value: outdoor air is better, indoor purifier PM2.5 reading is higher than outdoor;
Check whether there is ultrasonic humidifier, smoking, or heavy dust in the home to drive the air flow;
4. Perceived low PM2.5 value: severe outdoor pollution, indoor purifier PM2.5 reading is very low, dust indicator shows green.
When the tightness of the home room is good, the air can be purified by 500 cubic meters in one hour in the favorite level. If the home is a room of 20 square meters /3 meters high, the indoor air can be purified by 7.2 minutes. At this time, it is normal for the dust indicator to show green.
5. Replace the filter element.
