Aps - Navien NCB-180 Service Manual

4.9.7 APS

Part
Function
Failure Event
Effects
Error Code
Diagnostic
Color/Number of wires
66 NCB Service Manual
Detecting the air pressure entering the burner system.
1. Combustion noise occurs.
2. Imperfect and/or abnormal flame occurs.
3. Occurs when APS does not detect proper voltage.
1. The boiler is not operating.
2. Produces excessive carbon monoxide emissions.
E110
1. Visual inspection: Connection and/or breakage of wires.
2. Voltage check: Check range of voltage shown below.
3. Check the exhaust duct for obstruction or blockages.
4. Check the condensate trap and drain piping for obstruction or blockages.
5. Check for decreased hot water output.
RED-BLACK: DC 5 V

WHITE-BLACK: DC 0.3 ~ 4.5 V

Check Point
Version 1.0