Navien CH-180 Service manual - page 63
61
5.4. 03Error
Error occurrence conditions and check items
Error
03E
Check items
Description
In case of an ignition failure, repeat restart 10 times. If no flame is detected,
the system displays the error message 03E (manually cancelled) on the indoor
thermostat.
1. Check the gas supply (check the gas valve and supply pressure).
2. Check the gap of electrode, electricity discharge, or deformation of flame
rod.
3. Check the operation of the ignition transformer (ignition state, input power
(AC 120V))
4. Check the operation of the gas control valve (DC 100V, coil short circuit,
solenoid valve).
5. Check the flame rod, and wiring and grounding.
6. Check if the APS hose is broken or clogged.
7. Check if the APS works properly.
8. Check the PCB DIP S/W model setting.
9. Adjust differential pressure to MIN between 3 stages with the gas manom
eter (17mmH
ЊO±1)
10. Disassemble the manifold and check the nozzle.
11. Check the flue and air supply (downward installation / rainwater collected)
12. If the trouble continues despite the checking of above items, replace the
PCB.
©Navien America Inc. 2010
CH series service Manual
Version 1.0