03Error - Navien NP-180 Service Manual

5.3. 03Error

Error occurrence conditions and check items
Error
In case of an ignition fail, repeat restart 10 times. If no flame is detected, the system
03E
Ignition fail
displays the error message 03E (manually cleared) on the remote controller.
Check the gas supply (check the gas valve and supply pressure).
1.
2. Check the operation of the ignition transformer (ignition state, input power
(AC 102~132 V))
Check the operation of the gas control valve (DC 83~120 V, coil short circuit,
3.
solenoid valve).
Check the flame detecting rod, and wiring and grounding.
4.
Check items
Check if the air pressure hose is broken or clogged.
5.
Check if the air pressure sensor works properly.
6.
Check the PCB DIP S/W capacity setting.
7.
Adjust differential pressure to MIN between 3 stages with the gas detector.
8.
Disassemble the manifold and check the nozzle.
9.
Check the flue and air supply (downward installation / rainwater collected)
10.
If the trouble continues despite the checking of above items, replace the PCB.
11.
©Navien America Inc. 2010
Description
67
NR/NP series service Manual Version 2.0