Carrier XCT7 40VH A-7G Series Installation And Owner's Manual page 20

Operation instruction
Special Functions
Power-down Memory
Power-down memory has been defaulted upon leaving factory.
Activating: when the unit is ON, continuously press screen clean-up button 10 times in 5 seconds; buzzer
continuously rings 4 times; power-down memory is activated;
Cancelling: when the unit is ON, continuously press screen clean-up button 10 times in 5 seconds; buzzer
continuously rings 2 times; power-down memory is cancelled.
Note:
Other functions except mode functions can only be set through wire control matched with heat reclaim ventilation.
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