Lacey Act Declaration Form

Page 14
Operating Instructions
mrcool.com
While two or more indoor units are operating simultaneously, make sure the modes selected on each of the
units do not conflict with one another. The HEAT mode claims precedence over all of the other modes. If the
unit initially started to operate in HEAT mode, the other units can only operate in HEAT mode. For example: If
the unit initially started to operate under COOL or FAN mode, the other units can operate under any mode
except HEAT. If HEAT mode is selected on one of the units, the other units will cease operating, and one of
the following will occur, depending on the model:
Special Functions
Refrigerant Leakage Detection:
When a refrigerant leakage is detected, the indoor unit will display an “EC” or “ELOC“ code or flash LEDs.
Louver Angle Memory Functions (optional):
If the horizontal louver is within the safe operation angle, the system will remember the last position selected
by the user and return to it. If the louver is in a position that exceeds the safe operation angle, it will default to
a position that is within the safe operation range. However, it will not return to a safe operation angle when
TURBO mode is activated, the unit is in manual control mode, or after a power interruption. Subsequently, it
is strongly recommended that the horizontal louver angle not be set too small in order to avoid possible
condensation leakage.
Anti-Cold Air Function (Cooling and Heating models only):
The unit is designed to not blow cold air while in HEAT mode, when the indoor heat exchanger is in one of the
following situations and the set temperature has not been reached.
• When the unit has just begun heating.
• While the unit is defrosting.
• Low temperature heating.
Defrosting Function (cooling and heating models only)
Frost may be generated on the outdoor unit during a heat cycle, when the outdoor temperature is low and
the humidity is high. This results in lower heating efficiency by the unit. Under these conditions, the air
conditioner will stop heating operations and will begin defrosting automatically. The time to defrost may vary
from 4 to 10 minutes, depending on the outdoor temperature and the amount of frost buildup on the
outdoor condenser. NOTE: During defrosting, the indoor and outdoor fans will stop spinning.
Anti-Mildew Function (some units):
When the unit is turned off when in COOL, DRY, or, AUTO modes, it will continue to operate at very low
power. This is to aid in drying any condensation that has formed inside the unit to prevent mildew growth.
Auto-Restart (some units):
In the event of a power interruption, such as a blackout, the unit will stop. It will then restart automatically and
resume the previous operation when the power supply returns. NOTE: In order to protect the
compressor, once it stops it cannot be restarted for 3 minutes.
Wireless Smart Control Function:
Connect the wireless control module via the USB port in the back of the front cover of the indoor unit. This
will allow the unit to be controlled by the remote control and/or the smartphone app. For the USB device
access, replacement, and maintenance operations must be carried out by a professional staff.
For models equipped with a display window only- This “--” will appear in the display window.
For units without a display window- The auto and operation indication light will flash rapidly,
the defrost indication light will turn off, and the timer indication light will remain on.
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Operation Mode Selection