Navien NPE-180A Service Manual page 43

4.7.14 Error occurrence history display
1. At the <Normal operation mode> or <Error display mode>, press the [Info] button for over 2 seconds to access the error history mode.
The most recent error will be displayed first.
2. When the [+] / [-] button is pressed, the error history can be searched. A total of 10 errors are stored in memory and are labeled from 0 to 9
with 0 being the most recent error.
3. Whenever the [Info] button is pressed, the previous error occurrence time difference(unit time, maximum 9999 hr) and the sub error code
are toggled and displayed.
4. Pressing the [Reset] button for 5 seconds while in the <ERROR HISTORY DISPLAY MODE> displays "CLR" and deletes all the ERROR HISTORY
DATA.
5. Press the [Reset] button once to return to the <Normal operation mode>.
6. If there is no button input for 5 minutes, then it automatically returns to the <Normal operation mode>.
While in <ERROR HISTORY DISPLAY MODE> the first digit indicates the history of the error with 0 being the most recent. The remaining 3
digits indicate the error code. If there is no error history, a "0" will be displayed.
Passed time display: The time between the currently displayed error and the just previously generated error is displayed in 1-hr unit.
(0 is displayed if the error code is empty)
Ex) When the most recent error code is 615, the sub error code is 5, and 24 hours have passed since the error was generated.
When the Sub Error Code is 0(i.e., there is no sub error code), the display is as follows:
●
4.7.15 Service information display
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 2nd, 3rd and 4th segment. (Alphabetical numbering A~Z are indicated and next ones and indicated as 1~9, then those
after that are indicated as symbols.)
4. Press the [Reset] button once to return to the <Normal operation mode>.
5. If there is no button input for 1 hour, then it automatically returns to the <Normal operation mode>.
6. The proper units are indicated with the LCD ICON for the applicable input items (Example: Water pressure - psi).
Item
(A)Flow rate
42 NPE Service Manual
Description
Display of the current flow rate
Minimum display unit : 0.2
Gal/min or l/min
Display method
GPM flow rate display
ex ) 10.2GPM
Version 2.21