Key Options
Samsung Electronics 303
■
Connecting the Mode Select switch to the outdoor unit's Main PBA
Outdoor unit's Main PBA
Option switch (CN902)
Use Option setting to enable
cooling or heating mode.
How to use the Mode Select switch
Pin1-2 Pin2-3 State
Short Open Cooling only
Open Short Heating only
Open Open Cooling/Heating
Red Blue
White
CN902
Connector on
outdoor unit PBA
Cooling
only
Cooling/
Heating
Heating
only
Operation
• If set to Cool, the outdoor unit operates in cooling mode only.
• If set to Heat, the outdoor unit operates in heating mode only.
8-5-4 Application of Mode select Switch (cont.)
8-5 Applications (cont.)
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