Navien NHB-055 Service Manual page 35

9. Entering <Error History mode> is available via
<Normal Operating mode>.
Item Description
Normal
1.
Operating
Normal
mode with
status
power On
Version 1.0
Display
When the current supply water
temperature is 120°F and the water
pressure is 12.3psi, the image
below repeats at 5 second intervals
(Fahrenheit specification)
Flashing
5 sec
psi
When the supply water
temperature is 60.0°C and its
water pressure is 12.3psi, the
image below repeats at 5 seconds
intervals. (Celsius specification)
Flashing
5 sec
psi
Item Description
When the current supply water
temperature is 120°F and its
water pressure is 12.3psi, the
image below repeats at 5 seconds
intervals. (Celsius specification)
Error icon flashes at 1 second
intervals.
2. Level1 Level 1 Error
Error occurrence
occurs status
When the current error is Level 1,
the 218 (error code will display for
5 seconds), Error icon flashes at 1
second intervals.
3. Level1
When a level
Error
1 error occurs
displays
Display
5 sec flashing
psi
1 sec flashing after display of 5sec
NHB Service Manual 35