Gps - Navien NP-180 Service Manual

4.6.12. GPS

Navien Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color /
Number of wires
©Navien America Inc. 2010
NASS9EXGPS01
1. Sensing the gas-pressure for gas velocity to control combustible air supply.
2. GPS device automatically detects the quantity of gas supply at all times for
ideal combustion with proper air supply.
3. The unit is designed to operate properly even when there's low gas pressure
supply (within certain range of gas pressure 95 %) because GPS makes
if possible to check and modulate gas ratio for stable combustion.
1. Gas leak from the valves.
1. Gas leak from the unit.
2. No flames.
3. No operation of the unit.
4. Excess carbon monoxide emissions.
E035, E048(only LP model)
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
54
NR/NP series service Manual
Check Point A
Version 2.0