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3)Heating Mode
Heating Process
When the indoor ambient drops 2 F below the preset temperature, the unit will start the heating cycle. e outdoor fan,
compressor and 4-way valve will operate. e indoor fan will operate in the “Cold Air Prevention” mode in which the
indoor fan will have a 2 minute delay a er the call for heating. e indoor evaporator coil temperature must reach 104 F
before the indoor fan will start, this will prevent cold air from discharging from the indoor coil. When the indoor evapo-
rator coil temperature is > 104 F, the indoor fan will operate at low speed for 1 minute. With 1 minute of operation or 2
minutes of no fan operation and the indoor evaporator coil temperature is > 108 F, the indoor fan will operate at its preset
condition.
If the indoor ambient temperature is < 9 F and > 2 F of the preset temperature, the unit will run in its original mode of
operation.
If the compressor is running and the mode is changed from cooling to heating, the 4-way valve will be energized 2-3 min-
utes later.
If the indoor ambient temperature is >= 9 F than the preset temperature, the compressor will stop and the outdoor fan will
stop a er a 30 second delay. e indoor fan will continue to operate at its preset mode.
e G10 technology will determine compressor frequency based on ambient temperatures.
System Operation 9,000/12,000 btuh Models, cont.
+9 F
+ 2 F
Stop heating
Basic Functions
Product Introduction
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