AC3998 - Air purifier PHILIPS - Free user manual and instructions
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| Product Type | Air Purifier |
| Dimensions (H x W x D) | 58.5 x 27.5 x 27.5 cm |
| Weight | 5.6 kg |
| Power Supply | 220-240 V, 50/60 Hz |
| Power Consumption (Max) | 50 W |
| Noise Level | 20 - 60 dB(A) |
| CADR (Smoke/Dust/Pollen) | 300 m³/h |
| Filtration System | Pre-filter, HEPA H13, Activated Carbon |
| PM2.5 Removal Efficiency | > 99.9% |
| Coverage Area | Up to 70 m² |
| Operating Modes | Auto, Sleep, Turbo, Manual |
| Sensors | PM2.5, Ambient Light |
| Display | Color Ring for Air Quality Index |
| Timer | 1 - 12 hours |
| Filter Replacement Indicator | Yes |
| Pre-filter Cleaning Frequency | Every 2 weeks |
| Main Filter Replacement | Every 2 years (model FY2146/30) |
| Child Lock | Yes |
| Auto Shut-off (Cover Open) | Yes |
| Spare Parts Available | Filter FY2146/30, Remote Control |
| General Information | Brand: Philips, Model: AC3998, Made in China |
Frequently Asked Questions - AC3998 PHILIPS
How often should I clean the pre-filter?
Clean the pre-filter every two weeks to maintain optimal performance. Use a vacuum cleaner or rinse with water and let it dry completely before reinserting.
When should I replace the HEPA filter?
The HEPA and activated carbon filter should be replaced every two years. The filter replacement indicator will alert you when it's time. Use official Philips filter model FY2146/30.
What is the maximum room size for this air purifier?
The Philips AC3998 is effective for rooms up to 70 m² (about 750 sq ft) based on a CADR of 300 m³/h.
How do I activate the child lock?
Press and hold the lock button (usually depicted as a padlock icon) for 3 seconds to enable or disable the child lock feature. When active, other buttons will not respond.
What do the colors on the air quality indicator mean?
The ring changes color based on PM2.5 levels: Blue (good), Green (fair), Yellow (moderate), Red (unhealthy). This helps you quickly assess air quality.
Can I use this purifier without the remote control?
Yes, all functions can be controlled via the buttons on the unit. The remote is optional for convenience. If lost, you can purchase a replacement.
Is it safe to leave the purifier on overnight?
Yes, the Sleep mode is designed for quiet, low-speed operation with dimmed lights. It’s safe to run 24/7. The unit automatically adjusts fan speed based on air quality.
How do I reset the filter replacement indicator?
After replacing the filter, plug in the purifier and press and hold the reset button (often the same as the filter button) for 3 seconds until the indicator turns off.
What does the Turbo mode do?
Turbo mode runs the fan at maximum speed for rapid purification. It is the loudest setting but most effective for quickly clearing pollutants like smoke or strong odors.
How do I clean the exterior?
Unplug the unit and wipe the outer surface with a soft, dry cloth. Do not use abrasive cleaners or water directly on the unit. For stubborn spots, lightly moisten the cloth.
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USER MANUAL AC3998 PHILIPS
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Product information
Brand : PHILIPS
Model : AC3998
Category : Air purifier