Navien NP Condensing Tankless Gas Water Heater - Service Manual
Navien NP Condensing Tankless Gas Water Heater - Service Manual
Navien NP Condensing Tankless Gas Water Heater - Service Manual
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5.3. 03Error<br />
Error occurrence conditions and check items<br />
Error<br />
03E<br />
Ignition fail<br />
Description<br />
In case of an ignition fail, repeat restart 10 times. If no flame is detected, the system<br />
displays the error message 03E (manually cleared) on the remote controller.<br />
Check items<br />
1. Check the gas supply (check the gas valve and supply pressure).<br />
2. Check the operation of the ignition transformer (ignition state, input power<br />
(AC 102~132 V))<br />
3. Check the operation of the gas control valve (DC 83~120 V, coil short circuit,<br />
solenoid valve).<br />
4. Check the flame detecting rod, and wiring and grounding.<br />
5. Check if the air pressure hose is broken or clogged.<br />
6. Check if the air pressure sensor works properly.<br />
7. Check the PCB DIP S/W capacity setting.<br />
8. Adjust differential pressure to MIN between 3 stages with the gas detector.<br />
9. Disassemble the manifold and check the nozzle.<br />
10. Check the flue and air supply (downward installation / rainwater collected)<br />
11. If the trouble continues despite the checking of above items, replace the PCB.<br />
©<strong>Navien</strong> America Inc. 2010<br />
67<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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