Navien NCB-24LSWE, Service Manual

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NCB Service Manual 43 Version 1.0
4.4.11 Service Status Information
1. From <Normal operation mode> or <Error display mode>, press and hold [Summer/Winter] and [DHW] simultaneously for >
5 seconds to enter <Service status mode>.
2. Press [+] or [-] to navigate through the service status information items.
3. The current service status information item is identified with a letter prefix followed by 3 digits of related data.
4. Press [Reset] once to return to <Normal operation mode>.
5. If no buttons are pressed for 1 hour, the system automatically returns to <Normal operation mode>.
(A) Duration since
installation
The number of days elapsed
since the boiler was installed is
displayed.
Messages are displayed sequentially at 1 sec
intervals.
Eg.) 2,500 days are have elapsed since the boiler’s
installation.
↔
(B) Number of Space
heating cycles The number of space heating
cycles is displayed.
Messages are displayed sequentially at 1 sec
intervals.
Eg.) The boiler has performed 13,700 space heating
cycles.
↔
(C) Total Space heating
duration
The total time (hours) space
heating has operated is
displayed.
Messages are displayed sequentially at 1sec
intervals.
Eg.) The boiler has been operating in Space heating
mode for 2,500 hours since it was installed.
↔
(D) Number of DHW
cycles The number of DHW cycles is
displayed.
Messages are displayed sequentially at 1sec
intervals.
Eg.) The boiler has performed 2,500 DHW cycles.
↔
(E) Total DHW duration
The total time (hours) DHW has
operated is displayed.
Messages are displayed sequentially at 1 sec
intervals.
Eg.) The boiler has operated in DHW mode for 2,500
hours.
↔
(F) Number of on-
demand DHW cycles The number of on-demand
DHW cycles is displayed.
Messages are displayed sequentially at 1 sec
intervals.
Eg.) The boiler has performed 5,500 on-demand
DHW cycles.
↔
(G) Number of misfires
The number of misfires is
displayed.
Eg.) Seven misfires have occurred.