Navien NCB-24LSWE, Service Manual

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NCB Service Manual 45 Version 1.0
4.4.12 Parameter Setting Mode
Parameter settings can be modified for boiler operations in different operating conditions, such as the space heating and DHW
temperature ranges. Follow the instructions below to access special parameter mode and change the available settings.
CAUTION
Parameters must be set by a qualified technician with extensive knowledge of the
boiler system. Setting parameters improperly may cause property damage or injury.
1. Press and hold [Power] to turn off the boiler.
2. Press and hold [ECO] and [Summer/Winter] at the same time for 5 sec to enter <Password setting mode>.
3. “PASS” is displayed when the user is in <Password setting mode>. Press [ECO] to go to Password input mode. “0000” is
displayed. The display returns to <Power off mode> if no activity is detected for 5 minutes.
4. Enter the password to enter <Parameter setting mode>. Refer to “Password Setting Mode” for information about setting
passwords.
Entering the Password
A. When “PASS” is displayed, press [ECO]. The display enters <Password input mode> and “0000” is displayed.
B. In <Password input mode> (“0000”), the first digit flashes at 500 msec intervals.
C. Press [Summer/Winter] to change number positions. The digit in the new position flashes at 500 msec intervals.
D. Press [+] or [-] to increase or decrease the number.
E. After the password is entered, press [ECO] to confirm the password. If the password is correct, <Parameter setting
mode> is displayed. If the password is incorrect, <Password input mode> (“0000”) is displayed again.
F. The display returns to <Power off mode>, if no activity is detected for 5 minutes.
G. If incorrect passwords are entered more than 10 consecutive times, the display returns to <Power off mode>. Also, if
[POWER] is pressed for >300 msec in <Password input mode>, the display returns to <Power off mode>.
H. The factory default password is “1234.”