Error Code Cause Action - Noritz NC380-SV-ASME Owner's Manual

Troubleshooting-3
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If there is a problem with the unit, a numerical error code
will flash on the remote controller.
If this occurs, take appropriate measures as listed below.
When an error code appears, the display and the operation light
will flash together.
Error Code
24
Check for an Error Code
Cause
Ignition error
Insufficient air supply,
exhaust blockage
Abnormal combustion,
low gas supply pressure
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.
Action
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.
(If the alarm doesn't sound)
• Open a door or window to let air in.
• Close the hot water fixtures.
• Press the power button to turn the unit off.
If the error code does not return when the unit is
turned back on, the unit was not getting enough air.
• If there is a range hood or kitchen fan in the room,
turn it down.
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Contact the nearest Noritz agent.
Flashing
Remote Controller