Coway Airmega AP-1220B Instructions Manual page 16

FORCED FILTER RESET MODE
How to Force-reset Filter
Use this function if you have replaced or repaired the filter before the filter alarm indicator
was turned on.
1. Press the Filter Replacement Cycle button and the Mood
button simultaneously for more than 2 seconds while the
product is operating.
2. The Pre-filter LED flashes at an approximately 0.5 second
interval.
3. Press the Filter Replacement Cycle button to select the
desired filter. filters are selected in the following order.
PRE → HEPA / CARBON → PRE & HEPA / CARBON → PRE
4. After selecting the filter to reset, press the Filter
Replacement Cycle button for 2 seconds or longer to reset
the filter setting.
∗ If the Filter Replacement Cycle button is not pressed within 10
seconds or if the Filter Replacement Cycle button and the Mood
button are pressed simultaneously for longer than 2 seconds, the
mode is canceled.
2 sec. 2 sec.
2 sec. 2 sec.