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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4.6.11. Manifold<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 />
BH0901018A Check Point Q<br />
1. To control the amount of supply gas by electronically following the main<br />
PCB board.<br />
2. To maximize combustion, main gas valve harmonized with GPS.<br />
3. When some disorders occur for the inadequate combustion, it shuts off<br />
the gas valve automatically and prevents unsafe situations.<br />
1. <strong>Gas</strong> leak from the valves.<br />
2. Unable to open/close (main and solenoid gas valve)<br />
3. Unable to modulate the gas flow (proportional gas valve)<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 />
E003, E012, E035, E048<br />
1. Visual inspection: Connection and/or breakage of wires.<br />
“clunk” sounds from the gas valves opening.<br />
2. Voltage check: Check range of voltage shown below.<br />
1. Brown - brown : ON – DC83 ~ 120 V, OFF – 0 V<br />
2. Yellow - yellow : ON – DC83 ~ 120 V, OFF – 0 V<br />
3. Red – red : ON – DC83 ~ 120 V, OFF – 0 V<br />
IN<br />
OUT<br />
SV1 SV2 PV<br />
[<strong>Gas</strong> Flow Diragram]<br />
©<strong>Navien</strong> America Inc. 2010<br />
53<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0
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