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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4.6.12. GPS<br />
<strong>Navien</strong> Part No.<br />
Function<br />
Failure Event<br />
Effects<br />
Error Code<br />
Diagnostic<br />
Color /<br />
Number of wires<br />
NASS9EXGPS01 Check Point A<br />
1. Sensing the gas-pressure for gas velocity to control combustible air supply.<br />
2. GPS device automatically detects the quantity of gas supply at all times for<br />
ideal combustion with proper air supply.<br />
3. The unit is designed to operate properly even when there’s low gas pressure<br />
supply (within certain range of gas pressure 95 %) because GPS makes<br />
if possible to check and modulate gas ratio for stable combustion.<br />
1. <strong>Gas</strong> leak from the valves.<br />
1. <strong>Gas</strong> leak from the unit.<br />
2. No flames.<br />
3. No operation of the unit.<br />
4. Excess carbon monoxide emissions.<br />
E035, E048(only LP model)<br />
1. Visual inspection: Connection and/or breakage of wires.<br />
2. Voltage check: Check range of voltage shown below.<br />
1. Red- black : DC 5 V<br />
2. White – black : DC 0.3 ~ 4.5 V<br />
©<strong>Navien</strong> America Inc. 2010<br />
54<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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