User Guide

42
When a failure occurs, information relating to the error blinks on the display.
The error alarm may also continuously sound.
Checking for Error Conditions
The display may indicate the type
of failure that has occured depending
on the system configuration.
Error Code Display Screen
To Stop the Error Alarm
Press the button (the indicator will turn off).
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.
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xture/faucet,andturntheunitbackon.
Iftheashingnumberdoesn'treturntheproblemissolved.
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Abnormal combustion,
low gas supply pressure
The unit may shut off and lock before long.
NeedstobeushedtheHeatExchangertoremovetheScaleBuild-up.
If the unit will shut off and locked for this error, the unit can temporarily operate
bydisconnectingelectricalpoweruntiltheHeatExchangercanbeushed.
ContactNoritzAmericaformoreinformationaboutushingtheHeat
Exchanger. (866-766-7489)
The unit detects Scale Build-up
in the Heat Exchanger.
(Warning indication, and
then the unit will shut off
before long.)
The unit is locked because of repeated Scale Build-up error codes.
MustushtheHeatExchangertoremovetheScaleBuild-up.
BeforeushingtheHeatExchanger,contactNoritzAmericaformore
information.(866-766-7489)
The unit detects the Scale
Build-up in the Heat
Exchanger many times
(The unit is locked.)
#
=0-9
=1-4, F
# =0-9
Troubleshooting-3
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90
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C
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