Gree GWH09ACC-K6DN A1 A/I Service Manual page 45

3. Special Functions
Defrosting Control
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4. Control Logic
(1) Compressor Control
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1. Cooling mode
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2. Dehumidifying mode
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3. Air-supplying mode
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4. Heating mode
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(2) Outer Fans Control
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(3) 4-way valve control
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(4) Evaporator frozen-preventing protection function
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Service Manual
Installation and Maintenance