User Manual
 Page 11
Operating Instructions
mrcool.com
Basic Operation MODEs: 
AUTO / COOL / DRY / HEAT (Model dependent). 
Auto Operation:
When you set the air conditioner in AUTO mode, it will 
automatically select cooling, heating or fan-only operation 
depending on set temperature and room temperature. 
The unit will control the room temperature automatically, 
according to the temperature point you set. 
SLEEP Operation:
When selected, the temperature will increase while 
cooling or decrease while heating by 1C / 2F per hour for 
the first 2 hours. Thereafter it keeps this new 
temperature for 5 hours before SLEEP mode switches off. 
DRYING Operation:
The temperature is regulated while dehumidifying by 
intermittently switching the cooling or fan-only operation 
on and off. The fan speed is set to LOW. 
HEATING Operation: 
This unit is a heat pump by design. By reversing the air 
conditioning process, it absorbs heat from outdoors and 
transfers it to the indoor unit. As a result, the operating 
performance and efficiency is reduced as the outdoor air 
temperature drops. If you feel that the heating 
performance is insufficient, it is recommended that you 
supplement heating with other appliances. 
Optimal Operation:
To achieve optimal performance, please note the 
following:
·  Adjust the airflow direction correctly, so that it is not 
towards people or at an extreme angle. 
·  Adjust the temperature to achieve moderate comfort 
levels. An excessively low or high temperature setting 
wastes energy. 
· Keep windows and doors closed, as this improves 
performance. 
·  Limit energy usage (run time) by using the TIMER 
function. 
· Do not put any objects near the air inlets / outlets. 
Doing so would impair performance and possible shut 
down the unit. 
·  Inspect the air filters periodically, and clean them as 
needed.
1 hour
1 hour
Set 
Temperature
Cooling
SLEEP operation
7 hours
timer OFF
Set 
Temperature
Heating
1 hour
1 hour
SLEEP operation
7 hours
timer OFF
How the air conditioner works
Closing the 
curtains while 
heating also
helps keep the 
heat in
Doors and 
windows should 
be kept closed










