Navien NP-180 Service Manual page 85

Check method
Error type
No blower action
Blower action
error
Blower RPM
Defective rotator
error
©Navien America Inc. 2010
Cause
1. Check the power supply to the blower.
Black+Red, approx. DC 127~184 V
2. Replace the PCB if power is not supplied normally.
3. If the trouble continues despite the checking of above items,
replace the blower.
<Blower connector>
1. If RPM is significantly low while the blower works and the power
supply is normal, replace the blower.
2. Check the blower RPM displayed on the PCB.
(Display: r320 3200 RPM)
3. If RPM is low or there is a sensor circuit error, replace the blower.
4. If the trouble continues despite the checking of above items,
replace the PCB.
NR/NP series service Manual
Check method
<Check the blower operation voltage: Black+Red,
approx DC 127~184 V >
83
Version 2.0