Trane TVR Pro CO Series Service Manual page 45

2.2 Components
Layout
Figure 5-2.2: Outdoor unit main PCB components
Function of buttons SW3 to SW6
Table 5-2.2: Function of buttons SW3 to SW6
Button
In menu mode: previous and next buttons for menu
SW3 (UP)
modes.
Not in menu mode: previous and next buttons for
SW4 (DOWN)
system check information.
SW5 (MENU) Enter / exit menu mode.
SW6 (OK) Confirm to enter specified menu mode.
Function
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