Navien NCB-180 Service Manual page 62

Point Function
J Power Input
K Igniter
L Pump
M Fan Motor
N Auto Feeder Valve
O Front Panel Controller
CN No. Wire Color
CN1
WHITE-BLACK
1-2
CN17
BLUE-BLUE
1-2
CN18
YELLOW-WHITE
1-3
CN8
BLACK-RED
4-7
CN8
BLACK-YELLOW
2-4
CN8
BLACK-ORANGE
3-4
CN8
BLACK-WHITE
1-4
CN21
PURPLE- PURPLE
1-2
CON1
All BLACK
1~14
Normal Value
Confirm appropriate power source.
AC 97~138V Confirm the FUSE.
Confirm the circuit breaker.
ON : AC 97~138V Confirm voltage when the unit is
OFF : 0V igniting.
ON : AC 96~138V
Confirm voltage as operating.
OFF : 0V
DC 127~184V Confirm steady voltage.
DC 15V Confirm steady voltage.
Voltage changes relative to fan
DC 0~7.5V
operation.
0~6500rpm Check PULSE.
ON: DC 22~24V
OFF: 0V
Check