Turning The Controller On Or Off - Navien NR-20DU User Manual

Turning the Controller On or Off

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To turn the controller on or off, press the Power
button.
When the power is on,
• The LCD display turns on.
• The LED indicator turns green.
• Hot water temperature is displayed.
Note
• When an error occurs, the LED
indicator turns RED and blinks (except
for Cascade mode).
• The backlight stays on for 8 seconds
when a button is pressed.
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