Navien NP-180, Руководство по обслуживанию

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4.6.20. Bypass Mixing Valve (“Non-A” Series)
Navien Part No.
Function
Failure Event
1. Mixes hot water from the heat exchanger with cold water from the water
inlet in order to modulate and control outlet water temperature.
The physical appearance of the bypass mixing valve is similar to that of the water adjustment valve.
However, their functions differ and cannot be substituted for each other.
1. Water leakage from the bypass mixing valve
2. The valve cannot modulate or make open/close positions.
1. Stop operating once detecting water leakage.
2. Temperature fluctuations in the hot water outlet.
E045
1. Visual inspection: Connection and/or breakage of wires.
Clean the Domestic cold water inlet filter.
2. Voltage check: Check range of voltage shown below.
1. Red – black : DC 7 ~ 13 V
2. White – black : DC 0 ~ 13 V
3. Blue – yellow : Pulse
4. Pink – orange : Pulse
Effects
Error Code
Diagnostic
AAVC9EXMIX01 Check Point I
Color /
Number of wires
Flow adjust
Feedback