Coway AP-2021A Gray User Manual page 30

ERROR CODE
If an error code as shown below appears while using the product, check the cause of the error and
operate according to the guide.
- Filter cover
It is displayed when the filter cover or filter is not mounted.
[Resolution guide]
Please check the filter cover and filter again and mount it.
- Light sensor
If an error occurs in the light sensor, the air quality display flashes
yellow.
[Resolution guide]
It is a temporary failure and is recovered automatically.
Please wait a moment.
- UVC
The UVC LED blinks when no UVC activity is detected for more than
about 5 seconds.
[Resolution guide]
Turn off the power, unplug the power cord, and plug it back in again
for operation.
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