Normal Operation - Navien NPE-180A Service Manual

4.7.8 Power ON/OFF
1. Turn the power ON/OFF by pressing the [POWER] button for
about 1 sec.
2. If the unit is experiencing an error, the error code will continue
to display on the front panel even if the unit is turned OFF.
Item Description

Normal operation

Power ON mode with power
turned ON
Power OFF
Power OFF condition with
power turned OFF
* If power is initially applied, the panel is turned ON for 2 seconds. (To check
whether the LCD is defective)
4.7.9 Normal operation
1. Turn the water heater ON by pressing the [Power] button for
approximately 1 second.
2. The setting temperature will be displayed.
3. Under the usage of AHU & Outdoor sensor, when DHW is off
and space heating is on, the current heating temperature
based on the AHU outdoor temperature will be displayed, and
when space heating is off, DHW temperature setting will be
displayed.
4. When an alarm occurs, the "A.760" code and the setting
temperature are toggled and displayed at intervals of 1
second.
5. While an alarm occurs, press the [Reset] button for over
2 seconds to display "RST" and then release the alarm.
Display method
Power ON: When the
setting temperature
is 120°F (Fahrenheit
specification)
Power ON: When the
setting temperature
is 60.0°C (Celsius
specification)
Power OFF: DISPLAY
ALL OFF except the
state icon (The state
icon is normally
displayed depending on
conditions)
6. When a level1 error occurs, the error icon flashes for 1 second
and the error code and the setting temperature are toggled
and displayed at intervals of 1 second (Level 1 Error = An error
that can be reset without turning the power OFF then ON).
7. Press the [Reset] button once for a level1 error so that "RST"
is displayed for 3 seconds and the error is released when the
error release condition is satisfied.
8. The water heater will function normally during an alarm or
level1 error.
Item Description
Normal
Normal operation mode
condition with power
turned ON
When a lime
alarm period
Alarm
set with a
occurrence
dip switch is
reached
Level1 error When a level1
occurrence error occurs
Display method
When the setting temperature
is 120°F (Fahrenheit
specification)
When the setting temperature
is 60.0°C (Celsius specification)
1 sec flashing
1 sec flashing
System Details 39