Use and Care Manual

36
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Check for an Error Code Display on the Operation Panel
If there is a problem with the unit, a numerical error code will ash 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 ash together.
Screen Display
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.
Check air supply vent for blockage or obstruction.
(
p.28)
This unit is equipped with an automatic service reminder.
If the display shows “88”, contact the nearest Noritz agent.
[When supplying combustion
air from the indoors]
The air supply vent may be
clogged.
Service Reminder
(Warning Indication)
Check exhaust vent for blockage or obstruction.
Check condensate drain line is clogged or frozen.
If the display continues, contact the nearest Noritz agent.
Have a professional check the gas supply pressure.
Exhaust vent may be clogged.
Condensate drain line may be
clogged.
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 xture,
and turn the unit back on. If the ashing number
doesn't return the problem is solved.
Flashing
Troubleshooting-3