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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Check method<br />
Error type<br />
Defective<br />
sensor<br />
Cause<br />
Defective contact<br />
of the connector<br />
Defective gas<br />
pressure sensor<br />
Check method<br />
Check the assembly and contact of the gas pressure sensor connector.<br />
Check the gas pressure sensor input/output voltage.<br />
Operating voltage (Black+Blue) : DC 5 V<br />
Sensor output voltage (Black+White)<br />
Open : DC 0.1±0.1 V or lower<br />
Short-circuit: DC 4.5±0.2 V or higher<br />
<br />
<strong>Gas</strong> pressure<br />
hose is pulled<br />
out<br />
Other trouble<br />
<strong>Gas</strong> pressure hose<br />
is pulled out<br />
Defective<br />
PCB<br />
Check the assembly of the gas pressure (+) or (-) hose, and if there is<br />
any damage on the hose.<br />
If the trouble continues despite the checking of above items,<br />
replace the PCB.<br />
©<strong>Navien</strong> America Inc. 2010<br />
108<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0