Information Display (For Servicer) - Navien NHB-055 Service Manual

4.4.10 Information display (for servicer)

1. At the <Normal operation mode>, press the [Diagnostic] button once to access the service information display.
2. Press [+] or [-] to navigate through the user parameters.
3. Item of current SERVICE Information Data is indicated as an alphabetical numbering on the first segment and relevant DATA value is
indicated at the 2 , 3
nd
that are indicated as symbols.)
4. The proper units are indicated with the LCD ICON for the applicable input items (Example: Water pressure - psi)
5. Press the [Reset] button once to return to the <Normal operation mode>.
6. If there is no button input for 1 hour, then the system automatically returns to the <Normal operation mode>.
Item
(A) Space heating supply
water temperature
(B) Space heating return
water temperature
(F) Outdoor air temperature
(with optional Outdoor
Temperature Sensor only)
Version 1.0
and 4 segment. (Alphabetical numbering A ~ Z are indicated and next ones are indicated as 1 ~ 9, then those after
rd th
Description
Display of the current space
heating outgoing water
temperature
Display of the current space
heating incoming water
temperature
Display of current outdoor
temperature
For Celsius (°C) mode;
ex) at 60°C
For Fahrenheit (°F) mode;
ex) 120°F
For Celsius (°C) mode;
ex) at 60°C
For Fahrenheit (°F) mode;
ex) 120°F
Outdoor Temperature display for Celsius (°C) mode
with optional sensor,
ex) at 15°C
Outdoor Temperature display for Fahrenheit (°F) mode
with optional sensor,
ex) at 59°F
Display
NHB Service Manual 41