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Check for an Error Code on the Operation Panel
If there is a problem with the unit, a numerical error code will flash on the operation panel.
If this occurs, take appropriate measures as listed below.
When an error code appears, the display and the operation light will flash
together.
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Abnormal combustion,
low gas supply pressure
Error Code Cause Action
Ignition error
Check whether the gas valve is open. Press the power
button to turn the unit off, open a hot water fixture,
and turn the unit back on. If the flashing number
doesn't return the problem is solved.
Contact the nearest Noritz agent.Abnormal combustion
Contact Noritz America if:
• Any other error code appears.
• An error code is indicated again after the above actions were followed.
• There are any other questions.
The water heater is equipped with an automatic
service reminder. Contact the nearest Noritz agent.*
Service warning
Flashing
* When the " " error code appears
Reset the display of the operation panel in the following way after the water heater is serviced.
When the "05" error code appears, reset the display only after the water heater is flushed and/or
the water treatment device is serviced.
If the error is reset without performing the necessary service, the water heater may fail prematurely.
1. Set the Power On/Off Button to the OFF position.
2. Push the Flow Meter Alarm Set Button more than 2 seconds.
3. Push the Flow Meter Alarm Set Button several times until "7 oF" is displayed.
4. Press Setting Button
"
▲
"
more than 5 seconds.
This will complete the service warning reset.
5. Push the Power On/Off Button.
6. The preset temperature is displayed.
How to reset the service warning:
Press setting button "▲" more than
5 seconds. At this time, a sound is
emitted from the operation panel.
Push the Power On/Off Button.
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