Navien NP-180 Service Manual page 32

GPS
normal?
MGV ON
Igniter ON
MV ON
Flame ON
during 10sec?
Igniter ON for 1sec
after Flame ON?
Igniter OFF
Burner Operation
Flow Sensor
>= 0.53 GPM
Flame OFF?
FM start-up:
FM and AP normal?
Excess Air Pressure?
APS normal?
GPS normal?
GARC
©Navien America Inc. 2010
YES
Lock-out:
NO
YES
D
NO
Ignition Failure
NO
straight 3 times?
YES
Igniter ON
NO
YES
Faucet Close
YES
NO
Flame OFF straight 20 times during
YES
burner operation?
NO
Lock-out:
YES
009E
NO
Lock-out:
YES
010E
NO
Lock-out:
YES
027E
NO
Lock-out:
YES
035E
NO
B
30
NR/NP series service Manual
035E
Lock-out:
YES
003E
D
YES
Lock-out:
012E
Version 2.0