What do my Philips Air Purifier's lights mean

You can see the quality of air your Philips Air Purifier is cleaning using the air quality lights (see image below). The different colours indicate the following:

• Blue: good

• Blue-violet: fair

• Red-Purple: unhealthy

• Red: very unhealthy

The following table contains further details for each colour. The second column for Thailand, Indonesia and India is based on the Chinese standard. The third column is only for India and takes effect from week 30, year 2020:

IAI (Allergen levels)	PM2.5 for ACxxxx/20; (Standard for fine particulate matter)
	For Thailand, Indonesia, India, it is based on the Chinese standard	India (effective date: YYWW：2030)
1	1~12	1~20
2	13~23	21~40
3	24~35	41~60
4	36~48	61~80
5	49~61	81~100
6	62~75	101~120
7	76~87	121~160
8	88~101	161~200
9	102~115	201~250
10	116~132	251~300
11	133~150	301~350
12	151~500	350~500

To check which standard your air purifier uses, see the image below. If the number is 2030 (year 2020, week 30) or higher, the air purifier uses the new Indian standard. If the number is below 2030, for example 1842, it uses the Chinese standard.

In this case, your air purifier indicates the current quality of the air by displaying a red or green light.

In the first few minutes after you select the SmartAir Control function, the air quality indicator will flash red to indicate that the air quality sensor is measuring the ambient air quality. After approximately 5 minutes, the air quality indicator lights up green if the air quality is good or lights up red if the air quality is poor.

Note: The SmartAir Control function is only applicable for purifiers AC406x. For these purifiers, this function automatically adjusts speed settings according to the current air quality.