Entering Lock Mode - Navien NR-21DU Manual

Entering Lock Mode

To prevent accidental pressing of the buttons and
to prevent children from adjusting the controller,
you can activate the Temperature Lock Mode.
To activate or deactivate Lock Mode, press the
Lock button for 2 seconds.
When Lock Mode is activated,
• The Lock icon appears on the display.
• All buttons except for Lock button are locked.
Note • Resetting errors or alarms is still
available with Lock Mode activated.
• You can change the settings from the
front panel with Lock Mode activated.
17 17