Aps - Navien NP-180 Service Manual

4.6.9. APS

Navien Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color /
Number of wires
©Navien America Inc. 2010
NASS9EX00009
1. Sensing the air-pressure for air velocity following gas supply.
2. APS device automatically controls the quantity of air supply operate with GPS.
1. The combustion noise occurs.
2. Imperfect and/or lifting Flame occurs.
1. The water heater is not operating.
2. Excess carbon monoxide emissions.
E009, E010, E027
1. Visual inspection: Connection and/or breakage of wires.
2. Voltage check: Check range of voltage shown below.
1. Red- black : DC 5 V
2. White – black : DC 0.3 ~ 4.5 V
51
NR/NP series service Manual
Check Point E
Version 2.0