Auto Feeder Valve - Navien NCB-180 Service Manual

4.9.17 Auto feeder Valve

Part
Function
Failure Event
Effects
Error Code
Diagnostic
Color/Number of wires
76 NCB Service Manual
Detect low and high water pressure using the electronic water pressure sensor If water pressure is low,
Water filling system operates automatically
1. Water filling system does not operate automatically.
2. Water filling system operates continuously.
1. System is low water pressure
2. If system is high water pressure for automatic filling, it is over flow
E351, E352
1. Visual inspection: check the Auto feeder valve connection wire.
2. Voltage check: Check range of voltage shown below.
Blue-Blue : ON DC 22 ~ 24V, OFF 0 V
<Auto feeder valve>
Check Point
Version 1.0