Samsung AVMKH020EA4 Service Manual page 160

Circuit Descriptions
8-1-6 Wall-mounted type
Samsung Electronics
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Circuit Descriptions
Outdoor Fan Control Up Down Step Motor
485 COMM. Control Indoor Unit Temperature
(Non polarity)
Transmitter Power(12V)
Display
Indoor Unit Setting Up(Option)
Electronic Expansion Valve S/W
Control
Ionizer
Auto Grille Step Motor
Remocon Module
8-6