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1.What is CADR? CADR stands for “Clean Air Delivery Rate,” which indicates the volume of filtered air delivered by an air purifier. CADR ratings show the effectiveness of how efficient the air purifier is at capturing fine particles from things like tobacco smoke and plant pollens from the room. Clean Air Delivery Rate From air cleaner to air cleaner, compare the CADR numbers. First look at suggested room size. Then refer to the Clean Air Delivery Rate (CADR) numbers. The higher the number, the faster the unit filters the air. 2. What is CFM and CMH of CADR? 1 CFM=1.71CMH 3. TROUBLESHOOTING GUIDE A. Unit shuts off unexpectedly or does not operate. Check that the unit is plugged into a working electrical outlet. Check that the motor protector is triggered. Check that the filter is in the unit and locked. Check that the front panel is latched firmly in place. B. No air circulating from unit Unplug unit. Check filter. Replace filter if necessary. C. Increase in noise level Make sure the filter is clean. Replace if necessary. D. Odors and smoke are not removed. Clean or replace the filter if it appears to be heavily soiled. E. The discharged air has an aroma or odor Check to see if the filter is heavily soiled. Replace the filter. Turn off the Ionizer F. Air quality indicator constantly shows poor air quality Wipe the lens with a clean cloth or vacuum to remove any dust that has settled on the sensor. G. Filter change indicator flicks Need to manual reset by long pressing filter change icon for 5 seconds, then release after heard the buzzer H. The unit can not power on without buzzer and power icon lighting Replace with new power PCBA I. The unit can power on with power icon lighting, but speed can not be set. Replace with new control PCBA J. The unit can power on but some displays show defective Replace with new control PCBA K. The unit’s PM 2.5 digital value shows different from ambient environment within 30% tolerance. Comply with particle sensor spec. L. The unit’s PM 2.5 digital value shows different from ambient environment beyond 30% tolerance. Replace with new particle sensor. M. The unit’s VOC digital value shows different from ambient environment. Replace with new VOC sensor. N. The unit is power on with all the buttons normal work including power icon lighting, but no air outtake comes. Remove filter plastic bag and re-install filter, then re-start. O. The unit is power on with all the buttons normal work including power icon lighting, but no air outtake comes. Replace with new motor P. No ion comes out Disassembly the unit, and re-insert ionizer module wire socket Q. There has odor coming out from outtake grill Replace with new filter R. The unit is power on but some display missed Replace with new display board. S. Wifi can not be connected Reset the route as 2.4G T. Wifi can not be connected Replace with new Wifi module U. Power button is invalid after turn on with heard buzzer Replace with new control panel or magnetic switch board