©Navien America Inc. 2010 NR/NP series service Manual
67
Version 2.0
5.3. 03Error
Error occurrence conditions and check items
DescriptionError
03E
Ignition fail
Check items
In case of an ignition fail, repeat restart 10 times. If no ame is detected, the system
displays the error message 03E (manually cleared) on the remote controller.
Check the gas supply (check
the gas valve and supply pressure).
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,
solenoid valve).
Check the ame detecting rod, and wiring and grounding.
Check if the air pressure hose is broken or clogged.
Check if the air pressure sensor works proper
ly.
Check the PCB DIP S/W capacity setting.
Adjust dierential pressure to MIN between 3 stages with the gas detector.
Disassemble the manifold and check the nozzle.
Check the ue and air supply (downw
ard installation / rainwater collected)
If the trouble continues despite the checking of above items, replace the PCB.
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