User Manual
 Page 11
Operating Instructions
mrcool.com
Special Functions Continued
WIFI Control Function
Connect the wireless control module via the USB port in the back of the front cover of the indoor unit for the 
unit to be controlled by remote control and/or smartphone app. 
Clean Air Filter Reminder (optional)
After 240 hours of operation, the indoor display window will display and flash “CL” as a reminder to CLEAN the air 
filter for more efficient operation. After 15 seconds, the system will revert back to the previous display again. 
When the “CL” indicator appears and flashes, please press the LED button on the remote control 4 times or 
press the manual control button 3 times to reset the hours. 
Replace Air Filter Reminder (optional)
After 2880 hours of operation, the indoor display window will display and flash “nF” as a reminder to REPLACE 
the air filter for more efficient operation. After 15 seconds, the system will revert back to the previous display 
again. When the “CL” indicator appears and flashes, please press the LED button on the remote control 4 times 
or press the manual control button 3 times to reset the hours. 
Mute Function (optional)
Press the LED button on the remote to turn off the LED display and silence the buzzer of the indoor unit, 
creating a quiet comfortable environment. 










