Navien NCB300-28K Service Manual page 32

4.4.6.5 Viewing Error History
To view the error history, press the Info button (
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 (
between the list of Errors. Press the ECO button (
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.
4.4.6.6 Viewing Service Information
) and the ECO To view the miscellaneous system information, press the Info
button (
5sec
Press the Plus button (
between the information items.
Press the Info button (
menu.
Item
0. Supply Temp
) to switch
1. Return Temp
) to select
2. DHW Temp
3. Water Flow
4. Outdoor Temp
5. K-Factor
6. WWSD Temp
7. WWSD On Diff
8. Heat Capacity
9. Flame state
A. Target RPM
B. Current RPM
C. Target APS
D. Current APS
E. Inlet Temp
F. Exhaust Temp
) for 5 seconds.
) or the Minus button (
) to return to the previous screen or
Heating supply temperature
Boiler return temperature
(Not Used)
DHW temperature
DHW Water Flow ON/OFF
Outdoor temperature
K-Factor valve
Warm Weather Shut Down
setting temp
Warm Weather Shut Down On
Differential temperature
Heat capacity (%)
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
Fan target speed (RPM)
Fan speed (RPM)
Fan target speed (APS) (Not
Used)
Fan speed (APS) (Not Used)
Inlet temperature (°C)
Exhaust temperature (°C)
) to switch
Description
System Details 31