Navien NCB300-28K, Service Manual

Page: 32 / 108

System Details 31
4.4.6.6 Viewing Service Information
To view the miscellaneous system information, press the Info
button ( ) for 5 seconds.
5sec
Press the Plus button ( ) or the Minus button ( ) to switch
between the information items.
Press the Info button ( ) to return to the previous screen or
menu.
Item Description
0. Supply Temp Heating supply temperature
1. Return Temp
Boiler return temperature
(Not Used)
2. DHW Temp DHW temperature
3. Water Flow DHW Water Flow ON/OFF
4. Outdoor Temp Outdoor temperature
5. K-Factor K-Factor valve
6. WWSD Temp
Warm Weather Shut Down
setting temp
7. WWSD On Diff
Warm Weather Shut Down On
Differential temperature
8. Heat Capacity Heat capacity (%)
9. Flame state
Flame detector AD value
●
Flame On: 8bit AD values
equal to or lower than 70
●
Flame Off: 8bit AD values
equal to or higher than 175
A. Target RPM Fan target speed (RPM)
B. Current RPM Fan speed (RPM)
C. Target APS
Fan target speed (APS) (Not
Used)
D. Current APS Fan speed (APS) (Not Used)
E. Inlet Temp Inlet temperature (°C)
F. Exhaust Temp Exhaust temperature (°C)
4.4.6.5 Viewing Error History
To view the error history, press the Info button ( ) and the ECO
button ( ) simultaneously for 5 seconds.
5sec
A list of 10 recent errors are displayed on the screen, with the
most recent error displayed.
Press the Plus button ( ) or the Minus button ( ) to switch
between the list of Errors. Press the ECO button ( ) to select
an error to view the elapsed time since the last error occurred.
Press the ECO button ( ) twice to select an error and view the
sub error code.
Press the Info button ( ) to return to the previous screen or
menu.