Navien NHB-055 Service Manual page 33

Long Key Combination
[Power] long key (300msec)
[Mode] long key (2 seconds)
[Reset] long key (5 seconds)
[Diagnostic] long key
(5 seconds)
[Diagnostic] long key
(10 Seconds)
[Diagnostic]+[Plus]+[Reset]+
[Power] long key (5Seconds)
* All button LEDs will be turned on to their maximum when buttons are pressed, and will be turned on at medium brightness at 5 second intervals from the
moment they are released and will be completely turned off after maintaining minimal brightness for 5 and 10 second periods.
* The button will be recognized as pressed once only when released after being pressed for over 5 second from the time of pressing (Short Key)
* If the button is pressed until the Long Key reference time from initial pressing, then it will be recognized as a Long Key at the time the conditions are met.
Version 1.0
Function
Power ON / OFF
Error history display
Individual deletion of Error History / Tech Data
Advancement into Test Menu
Version display
Factory reset
Remarks
Must be in normal mode or Error Display mode
Works only at the relevant mode
Must be in normal mode
1. Parameter Setting
2. Error Check Mode Menu
3. Operation condition setting mode
Possible only with power turned OFF
Possible only with power turned OFF
NHB Service Manual 33