Noritz NRC661-DV, Руководство по обслуживанию, Страница: 49 / 78

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The detail conditions for this error code are shown on page 24.
Setting list for Dip Switches
ow abnormality <Condition of occurrence for error code 90>
Detected abnor ow when the unit will start.
If 1 to 4 check out okay, replace the Circuit Board set
if the error code is displayed again.
901 Combustion abnormality
(War
<Condition of occurrence for error code 901>
When the unit has begun to operate,
- Air inlet for blockage or obstruction
- Exhaust for blockage or obstruction.
Combustion abnormality (Unit is locked)
Error Codes
Description
90
901, 902, 903
908
90
Display
Window
Remote
Controller
1 Check air inlet for blockage or obstruction.
2 Check exhaust for blockage or obstruction.
3 Check whether the fan motor is normal.
(ex. Clogging of fan blades, etc.)
4 Check the high elevation adjustment (Dip Switch Setting)
5 Check the vent length adjustment (Dip Switch Setting)
If 1 to 5 check out okay, replace the Fan Motor.
Replace the Circuit Board set if the error code is
displayed again.
* It is not necessary to replace the Display Window Circuit
Board.
1 Check air inlet for blockage or obstruction.
2 Check exhaust for blockage or obstruction.
3 Check the Fan Motor is normal.
(ex. Clogging of fan blades, etc.)
4 Check the Burner is normal (clogged*).
* How to check for clogged burner
* Check for clogged burner
Burner
Note) Remove the Manifold Plate.