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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5.26. 48Error<br />
Error occurrence conditions and check items<br />
Error<br />
48E<br />
<strong>Gas</strong> pressure<br />
error<br />
Description<br />
For an LP model, if a low-gas pressure is detected at high combustion (Stages 2-2<br />
and 3), the system displays 48E (cleared manually).<br />
If fire breaks out 5 times or more and ignition fails during the combustion after the<br />
low-gas error is detected<br />
If the target APS is out of a specific value range during the combustion with the<br />
gas/air rate adjusted.<br />
Check items<br />
1. Check the gas supply pressure. LP : 8”(9” 180 Model) ~13.5” W.C<br />
(at dynamic pressure)<br />
2. Check if the gas pressure sensor hose is damaged.<br />
3. Check if the gas pressure sensor is defective.<br />
4. Check if the PCB works normally.<br />
LPG <strong>Gas</strong> enough?<br />
No<br />
Fill the LPG <strong>Gas</strong><br />
Yes<br />
Check GPS Or supply Iine<br />
©<strong>Navien</strong> America Inc. 2010<br />
122<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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