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COOLING OPERATION
How it works:
In cooling mode, your indoor unit will absorb heat from the room,
then the outdoor unit will discharge the heat to the outdoors. The
cooling capacity decreases as the outdoor temperature increases.
This causes the unit to work harder and longer to hold the selected room
temperature.
Indoor Coil Freeze Protection:
Frost may form on the indoor coil during cooling operation when the
outdoor temperature is below 50° F (10° C). Prolonged operation may cause ice
to form on the indoor coil and block airflow. If the indoor unit
microcomputer detects ice on the indoor coil, it will stop the compressor to
defrost the coil and protect the unit.
HEATING OPERATION
How it works:
In heating mode, your outdoor unit will absorb heat from the outdoor
ambient, then the indoor unit will discharge the heat to the room. The
heating capacity will decrease as the outdoor temperature decreases.
During extremely cold outdoor temperatures, you may need an additional
heating source to supplement the heating output.
Defrost Function:
In heating mode, frost may form on the outdoor coil during humid and low
outdoor temperature conditions. Prolonging operation may cause ice to form
on the outdoor coil and block airflow. This will reduce the unit's, heating capacity.
If the microcomputer detects ice on the outdoor coil, it will switch
automatically to defrost mode to melt the ice and clear the coil. During
defrost mode, heating will be discontinued and the indoor unit will
flash the defrost indicator. The compressor will continue to run, but the indoor
and outdoor fans will stop. It is normal to see steam or vapor coming from
the outdoor unit in defrost mode. Defrost mode will terminate 12
minutes after the initiation of the defrost cycle or when the outdoor coil
temperature is 50° F (10° C) or greater.
SYSTEM OPERATION
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