Fan Motor - Navien NP-180 Service Manual

4.6.6. Fan motor

Navien Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color /
Number of wires
©Navien America Inc. 2010
NAFA9GSFB002
To provide combustion air into the burner and to exhaust flue gas.
Fan operated with APS or ideal combustion.
1. Fan speed failure: the fan RPM are less than or equal to 400 RPM.
2. The fan assembly screw loosens and/or the fan is disassembled.
3. Connection terminal assembly defectiveness.
1. Unstable combustion condition.
2. Unit vibrating and making a noise.
3. The water heater is not operating.
E009, E010, E027
1. Visual inspection: check the fan connection wire and/or the fan mounting
location.
2. Voltage check: Check range of voltage shown below.
1. Black-Red : DC 127 ~ 184 V
2. Black-Yellow : DC 15 V
3. Black-Orange : DC 0~7.5 V
4. Black-White : 0 ~ 6,500 RPM
48
NR/NP series service Manual
Check Point L
Version 2.0