Navien NFC-175, Service Manual

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32 NFC Service Manual
Version 1.0
4.5.1 Icons and Digital Display
The icons and digital display on the front panel provide important
information required for the boiler’s operation. Refer to the
following table for detailed information.
a
Outdoor reset
Displayed when the Outdoor Reset
feature is enabled.
b
Combustion
Displayed when the burner is combusting.
c
System fault
Displayed when a system fault is
detected.
d
Anti-freeze
Displayed when the boiler is operating in
anti-freeze mode.
e
Cascade/Main mode
Flashes when configuring a cascade
system. Turns on solid if the boiler is
set as the Master unit in a cascade
system.
f
DHW priority
Displayed when the DHW Priority feature
is enabled.
g
Space heating demand
Indicates the space heating demands
from thermostats 1, 2, and 3.
h
DHW demand
Indicates that DHW demand is present.
i
Space heating set temperature
Displays the currently set space
heating temperature.
j
DHW set temperature
Displays the currently set DHW
temperature.
k
Outdoor temperature
Displays the outdoor temperature.
l
System pressure
Displays the internal water pressure of the
boiler system.
4.5 The Front Panel
The front panel allows you to adjust the temperature and view the operating status or error codes. Remove the protective sheet from the front
panel before using it.
b
a
d
f
c
g
i
k
h
j
l
e