Use and Care Manual

28
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.
Clean the air supply vent.( p.21)
If the display continues, contact the nearest Noritz
agent.
[When supplying combustion
air from the indoors]
The air supply vent may be
clogged.
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Abnormal combustion,
low gas supply pressure
Troubleshooting-3
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Check for an Error Code on the Remote Controller
If there is a problem with the unit, a numerical error code will ash 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
ash together.
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
Remote Controller
Check to see if the condensate drain pipe is clogged
or frozen (
p.8)
Contact the installer or Noritz America Technical
Support for assistance.
Clogging of condensate
trap or drain pipe
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