Page 14
Operating Instructions
mrcool.com
Optimal Operation
How the A/C & Heat Pump Work
SLEEP Mode (Fig. 2.5):
The SLEEP function is used to decrease energy use
while you sleep. During sleep you do not need the same
temperature settings to stay comfortable. This function
can only be activated via the remote control. The SLEEP
function is not available in FAN or DRY modes.
When SLEEP mode is activated, the temperature will
increase while cooling, or decrease while heating by, 2°F
(1°C) per hour for the first 2 hours. Thereafter, it keeps
this new temperature for 6 hours before SLEEP mode
will automatically switch off.
Basic Operation Modes:
AUTO / COOL / DRY / HEAT
(Model Dependent)
AUTO Mode:
When you set the unit in AUTO mode, it will
automatically select COOL, HEAT, or FAN-ONLY
mode depending on the set temperature and the
room temperature. The unit will control the room
temperature automatically, according to the
temperature you set the unit to.
DRY Mode:
The temperature is regulated while dehumidifying
by intermittently switching the COOL or
FAN-ONLY modes on and off. The fan speed is
set to LOW.
HEAT Mode:
The unit is a heat pump by design. By reversing
the air conditioning process, it absorbs heat from
the outdoors and transfers it to the indoor unit. At
the same time, heat loading of the air conditioner
increases due to larger differences between the
indoor and outdoor temperature. 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.
To achieve optimal performance, please note the
following:
DO NOT put any objects near the air inlets &
outlets. Doing this would impair performance and
could cause the unit to shut down.
• Adjust the airflow direction of the louvers
correctly, so that it is not towards people or at an
extreme angle/closed.
• Adjust the temperature to achieve moderate
comfort levels. An excessively low or high
temperature setting wastes energy.
• Keep windows and doors closed, as this will
improve performance.
• Limit energy usage (run time) using the TIMER
function and SLEEP/ECO mode if applicable.
• Regularly inspect and clean the air filters.
Doors and windows
should be kept
closed.
Closing the curtains
while heating also
helps keep the heat in
Fig. 2.5
Set
temperature
1hr
1hr
Continues
running for
8 hrs.
SLEEP Operation
Saving energy during sleep
*COOL mode will increase
temperature 2°F (1°C) for the
first two hours
*HEAT mode will decrease
temperature 2°F (1°C) for the
first two hours
NOTE: A lightening strike or cell phone being
used near the unit could cause it to malfunction.
In the event this occurs, disconnect the unit from
it’s power source, then reconnect it. Push the
ON/OFF button on the remote controller to
restart the system.
NOTE: When the indoor unit reaches the
temperature set by the user, the compressor
will stop automatically, and the system will
switch to FAN-ONLY mode. The compressor
will restart when the room temperature
rises or falls from the set temperature.
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