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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5.25. 45Error<br />
Error occurrence conditions and check items<br />
Error<br />
Description<br />
In NR/<strong>NP</strong> type, check the condition of bypass mixing valve when supply power,<br />
turn R/C on/off, or stop burner operation. When bypass mixing valve is noticed<br />
in abnormal condition, display 45E.<br />
45E<br />
Bypass<br />
Mixing<br />
Valve error<br />
Display error code when bypass Mixing valve cannot close.<br />
(Display 16.01 at PCB – generally step motor of bypass mixing valve is in abnormal<br />
condition.)<br />
Display error code when bypass Mixing valve cannot open.<br />
(Display 16.02 at PCB – generally wire of mixing valve is disconnected or feedback<br />
sensor of bypass mixing valve is in abnormal condition.)<br />
Check items<br />
1. Check the connector is connected between bypass mixing valve and PCB.<br />
2. Defective Mixing trans.<br />
3. Defective Bypass Mixing valve<br />
4. Defective PCB.<br />
©<strong>Navien</strong> America Inc. 2010<br />
119<br />
NR/<strong>NP</strong> series service <strong>Manual</strong><br />
Version 2.0