COOLING OPERATION
SYSTEM OPERATION
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How it works:
In cooling mode, the mini split indoor evaporator absorbs heat from inside
the room, discharging the heat outdoors. The maximum cooling capacity
decreases as the outdoor temperature increases. The rise in outdoor
temperature causes the air conditioner to work harder & longer to hold
the 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 coils and block airflow. If the mini split microcomputer
detects ice on the indoor coil it will stop the compressor to defrost the coil,
protecting the unit.
HEATING OPERATION
How it works:
In heating mode, the mini split outdoor condenser will absorb ambient heat
from outside, discharging the heat indoors. The maximum heating capacity
decreases as the outdoor temperature decreases. The drop in outdoor
temperature makes less ambient heat available to pump inside (this is also
where the term “heat pump” comes from). During extremely cold outdoor
temperatures, you may need an additional heating source to supplement
the mini split’s heat pump.
Defrost Function:
In heating mode, frost may form on the outdoor coil during humid and low
outdoor temperature conditions. Prolonged operation may cause ice to form
on the outdoor coil and block airflow, reducing the system’s heating capacity.
If the mini split 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 mini split system will
flash the Defrost indicator. The compressor will continue to run while indoor
and outdoor fans will stop. It is normal to see steam or vapor coming from
the outdoor unit during defrost mode. Defrost mode will terminate 12 minutes
after the initiation of defrost cycle or when the outdoor coil temperature is
50°F (10°C) or greater.
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