Water Adjustment Valve - Navien NP-180 Service Manual

4.6.14. Water Adjustment Valve

Navien Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color /
Number of wires
©Navien America Inc. 2010
AAVC9EXFC003
1. To control the water flow for maintain steady hot water temperature.
1. Water leakage from the automatic water adjustment valve.
2. The valve cannot modulate or make open/close positions.
1. Stop operating once detecting water leakage.
2. No flames.
3. No operation of the unit.
4. Temperature fluctuations in the hot water outlet.
E034
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.
Feedback (D) : Red – black : DC 7 ~ 13 V
White – black : Pulse
Water Adjust (CW)(N) : Blue – yellow : ON AC 97~138 V, OFF 0 V
Water Adjust (CCW)(N) : Blue –orange : ON AC 97~138 V, OFF 0 V
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NR/NP series service Manual
Check Point
Flow adjust
N, D
Feedback
Version 2.0