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3.2.3.3 Auto fan of indoor fan under heating mode.
Room temp. up
Room temp. down
3.3 Defrost (only available to heating mode)
3.3.1 The defrosting is processed by indoor control board.
3.3.1.1 Defrosting Conditions
3.3.1.1.1 Low temperature defrosting condition:
Accumulated operating time when temperature of outdoor heat exchanger coil T3 is below -2°C reaches
up to over 40 minutes.
3.3.1.1.2 High temperature defrosting condition:
Under high temperature protection of evaporator, the time when outdoor fan is shut down but compressor
is not has been accumulated for up to 90 minutes. It is considered that defrosting is performed when
either 3.3.1.1 or 3.3.1.2 is met.
3.3.1.2 Defrosting Action
Four-way valve and outdoor fan are shut down. Indoor fan operates according to anti-cold air function.
Compressor keeps on continuously.
3.3.1.3 Ending Of Defrosting Condition
It is considered that defrosting condition is ended when any of the conditions is met:
3.3.1.3.1 Operating current of compressor reaches 1.5Ie.
3.3.1.3.2 Time of defrosting reaches 10 minutes.
3.3.1.3.3 Temperature of outdoor coil T3 is up to 20°C.
3.3.1.4 Ending Action of Defrost
3.3.1.4.1 Outdoor fan and four-way valve are open.
3.3.1.4.2 Compressor keeps on continuously.
3.3.1.4.3 Indoor fan acts according to anti-cold air function.
3.3.1.4.4 Defrosting/pre-heating lamp continues to be on until indoor fan starts up.
3.4 Cooling Mode
3.4.1 Four-way valve is closed. If four-way valve is open before the machine enters cooling mode, then four-way
valve will be closed at the first time the compressor starts under the cooling mode.
3.4.2 Conditions for the compressor and outdoor fan action (Ts = set temperature, Ta=room temperature)
Room Temp. up
Room Temp. down
3.4.3 Action of Indoor Fan
3.4.3.1 HIGH/LOW/AUTO fan can be switched over for your comfort.
3.4.3.2 Auto fan under cooling mode.
Condition (T =Indoor Temp.-Setting Temp.)
T<3
T>3
T> 1
T<1
Condition
Compressor
Ta> Ts+1
Ta<Ts+1
Ta> Ts
Ta<Ts
12
Indoor fan speed
Outdoor fan
On
On
Off
Off
On
On
Off
Off
High
Low
Low
High
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