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
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Check method<br />
Error<br />
Defective<br />
sensor<br />
Cause<br />
Defective<br />
temperature sensor<br />
connector<br />
Temperature<br />
sensor<br />
Check method<br />
Check if the temperature sensor connector or the PCB harness<br />
terminal is wet due to any reason, including leakage.<br />
Check the resistance of the temperature sensor.<br />
Replace the temperature sensor if the resistance value is abnormal.<br />
(Defective if it is 0.5 or lower)<br />
Check the temperature displayed on the PCB(C.10.010.0).<br />
Other trouble<br />
Defective<br />
PCB<br />
If the trouble continues despite the checking of above items,<br />
replace the PCB.<br />
< Heat exchanger input temperature sensor /<br />
connector, Black 2P ><br />
< Check if the hot water tem-perature sensor is open ><br />
©<strong>Navien</strong> America Inc. 2010<br />
97<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0