Use and Care Manual

20
Troubleshooting
Check for an Error Code on the Remote
Controller
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 : 11
Cause : Ignition failure
Action : Check whether the gas valve is open. Press
the button to turn the Water Heater off,
open a hot water fixture/faucet, and turn
the Water Heater back on. If the blinking
number doesn’t return the problem is
solved.
Error Code : 90
Cause : [When supplying combustion air from the
indoors]
The air supply vent may be clogged.
Action : Check air supply vent for blockage or
obstruction. (See page 16)
Cause : Exhaust vent may be clogged.
Action : Check exhaust vent for blockage or
obstruction.
Cause : Abnormal combustion, low gas supply
pressure.
Action : Have a professional check the gas supply
pressure.
Cause : Condensate drain line may be clogged.
Action : Check condensate drain line is clogged or
frozen. If the display continues, contact
nearest Noritz agent.
Error Code : 99
Cause : Abnormal combustion
Action : Contact the nearest Noritz agent.
Error Code : C1# (# = 1-9)
Cause : Service Reminder (Notice for periodic
maintenance)
Action : This Water Heater is equipped with an
automatic service reminder.
Excessive scale build-up may cause
premature failure of the Heat Exchanger.
Excessive dust or lint build-up in the fan
and air intake may affect efficiency and
combustion performance.
Contact Noritz America for additional
information about recommended
maintenance procedures (1-866-766-
7489).
When a failure occurs, information relating to the
error blinks on the display.
If this occurs, take appropriate measures as the
following list.
Blinking