25
Troubleshooting-1
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 for an Error Code on the Display Window or Optional Remote Controller
If there is a problem with the unit, a numerical error code will flash on the display window or
optional 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.
Flashing
Optional Remote Controller
Display Window
Remote Controller
Cause
Action
Error Code Error Code
Ignition error.
Check whether the gas valve is open. Unplug
the unit from power or press the power button
on the optional remote controller 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.
Clogging of condensate trap
or drain pipe.
Check to see if the condensate drain pipe is
clogged or frozen. (
p.8)
Contact the installer or Noritz America
Technical Support for assistance.
Abnormal combustion.
[When supplying combustion
air from the indoors]
The air supply vent may be
clogged.
Clean the air supply vent. (
p.22)
If the display continues, contact the nearest
Noritz agent.
Abnormal combustion,
low gas supply pressure.
Have a professional check the gas supply pressure.
Contact the nearest Noritz agent.
Abnormal combustion.
Contact the nearest Noritz agent.
The outlet temperature is
colder than set temperature.
Contact the nearest Noritz agent.
The indication on the display window shown is not an error of unit.
If you try to supply a low flow of water when the inlet water temperature
is high, hot water is not supplied sometimes (combustion is automatically
stopped and the temperature of hot water does not become hot).
Display Window
