Error Display And Reset; Adjusting The Space Heating Temperature - Navien NHB-055 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
36 NHB Service Manual
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.
You can adjust the temperature while the display is flashing. Once
the display stops flashing, the temperature setting is stored.
MODE
MODE
Version 1.0