19
Troubleshooting
Other
Other
The Water Heater stops burning during operation.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture/faucet sufficiently open?
• Is the gas being cut off by the gas meter? (Can
other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank? (Can
other gas devices such as stoves be used?)
White smoke comes out of the exhaust vent on a
cold day.
• This is normal. The white smoke is actually
steam.
The hot water is turbid.
• This is harmless. Small bubbles appear as the air
in the water is heated and depressurized rapidly
to atmospheric pressure.
The water appears blue.
The tub/wash-basin has turned blue.
• Coloration to a blue color may be noticed from
small traces of copper ion contained in the
water and fat (furring). However, there are not
problems concerning health. Coloration of the
tub/wash-basin can be prevented by cleaning
frequently.
Frequent water discharge from the condensate
drain pipe.
• Condensation forms inside the Water Heater
during operation and is discharged from the
condensate drain pipe.
Recirculation operates with only cold water is
being used.
• Check to see if the crossover valve is installed.
The crossover valve utilizes the cold water line as
a return, allowing the system to function similar
to a dedicated return line. The Water Heater will
operate and learn the hot water usage.
Check for an Error Code on the Remote
Controller
When a failure occurs, information relating to the
error blinks on the display.
If this occurs, take appropriate measures as the
following list.
The fan can be heard after operation is stopped.
A motor can be heard when turning the Water
Heater on or off, when opening or closing a
fixture, or after the Water Heater has been
running for a while.
• These noises indicate the proper operation of
devices which are designed to let the Water
Heater reignite more quickly, and ensure the
water temperature is stable.
The Water Heater makes noise when there is no
hot water being used.
• The Water Heater operates automatically to
recirculate water, prevent freezing or prevent
stagnant water. It is not abnormal.
Sounds
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 : 63
Cause : Recirculation Abnormality
Action : • Check return line filter.
• Check the crossover valve’s filter.
• Contact Noritz America if there are any
other questions.
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 15)
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.
Blinking
