Error Display And Reset; Adjusting The Space Heating Temperature - Navien NCB-180 Service Manual

4.4.5 Error Display and RESET

1. When an error higher than Level 2 occurs (the Boiler may
stop operation or only has basic functions), the Boiler
enters <Error Display mode> directly at <Normal
Operating mode> or <Power Off mode>.
2. When an error occurs at other panel modes, only the Error
icon flashes and it enters <Error Display mode> after
terminating the current mode.
3. The Error icon and error code flash alternately at 1 second
intervals at <Error Display mode>.
4. The error code displays 3 digits.
5. Entering Service Info, Error History or Special Parameter
mode is available at <Error Display mode>.
6. When pressing the [Reset] button once while the error
code is displayed, the error will be released after 'RST'
displays for 3 seconds if the Boiler meets the conditions to
release the error. If releasing the error is not possible, the
error code will display again after 3 seconds.
7. When releasing the error by pressing the [Reset] button
once or it is automatically released at <Error Display
mode>, the Boiler returns to <Power Off mode> after
releasing the error, if the error occurred in a specific mode
(Power OFF, Test, or Parameter Setting mode) .
Item Description Display
1 sec flashing

4.4.6 Adjusting the Space Heating Temperature

The boiler is set to 140°F (60°C) by default. To adjust the space
heating water temperature:
1. Press the Mode button once. The space heating icon turns
on.
2. Press the + (Up) or – (Down) buttons until the desired
temperature appears on the display.