Engineering Manual

T-STAT Interface PAC-US444CN-1
SW1-3/4: The indoor unit fan speed can be adjusted via the following settings:
SW1-3 SW1-4 Result
OFF OFF Auto (Default)
ON OFF Medium
OFF ON High
ON ON Custom Auto
Note: Custom Auto provides more comfortable fan speed operation vs. the more
Two-Stage Thermostat Operation
SW2-6: Adjusts indoor unit operation during stage 1 heating and stage 1 cooling
according to the following table:
SW2-6 Operation during stage 1
OFF Full capacity
ON The capacity is adjusted so that the room temperature is
Note: When either Y2 or W2 is left unconnected, it is recommended to
set SW2-6 to the OFF position. When both Y2 and W2 are connected, it is
recommended to set SW2-6 to the ON position.
Static Pressure Settings
SW2-1, SW2-2, SW2-3: These adjust the static pressure function settings of the
indoor unit according to the following table:
DIP switch position on
PAC-US444CN-1
Indoor Unit Settings
SW2-1 SW2-2 SW2-3 Mode 8 Mode 10 Mode 23 Mode 11
OFF OFF OFF Not set Not set Not set Not set
OFF OFF ON Not set Not set Not set Not set
OFF ON OFF 2 1 Set by SW2-4 2
OFF ON ON 2 2 Set by SW2-4 2
ON OFF OFF 1 1 Set by SW2-4 2
ON OFF ON 1 2 Set by SW2-4 2
ON ON OFF 3 1 Set by SW2-4 2
ON ON ON 3 2 Set by SW2-4 2
*Refer to the appropriate Indoor Unit Installation Manual for Mode 8 and Mode 10
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