27
Problems
What to do
Display Window
The hot water at the
fixture is too hot.
Are the gas and water supply valves fully open?
[Using the optional remote controller]
Is the water temperature setting appropriate? (page 14)
[Using the optional remote controller]
If the water supply temperature is high, it is possible
for the outlet temperature to be higher than the
temperature set on the remote controller.
[Using the optional remote controller]
If only a low flow of hot water is demanded, it is
possible for the outlet temperature to be higher than the
temperature set on the remote controller.
The hot water at the
fixture is not hot enough.
Are the gas and water supply valves fully open?
[Using the optional remote controller]
Is the water temperature setting appropriate? (page 14)
If the amount of hot water required is very high, it is
possible for the outlet temperature to be lower than the
temperature set on the remote controller.
Decrease the amount of hot water passing through the
unit and the temperature should stabilize.
The actual outlet water temperature is lower than the set
temperature of the unit.
Contact the nearest Noritz agent.
The water is cold when only
a single fixture is open.
The unit will not heat the water if the flow rate is less
than 0.5 gallons (2L) per minute.
Open the fixture more or open other fixtures so that
a greater flow passes through the unit, and the unit
should begin heating again.
The unit does not fire when
water is flowing due to high
supply water temperature.
If you try to supply a low flow of water when the supply
water temperature is too high.
The unit will not fire because it will over heat the outlet water.
Fluctuations in hot water
temperatures.
Clean the water filter of any debris.
(page 23)
[Using the optional remote controller]
Setting temperature cannot rise.
Is the maximum temperature setting appropriate? (page 18)
Initial Operation
Problems
What to do
Display Window
Unit does not attempt to
ignite when water is running.
Check for reversed plumbing?
Check the water drain valve filter. (
page 23)
Unit attempts to ignite but
fails.
Reset unit and try again. There may be air in the gas line.
Have a professional check the gas supply pressure.
The hot water is not the
correct temperature.
The water may be mixed in the hot water plumbing.
The actual outlet water temperature is lower than the set
temperature of the unit.
Contact the nearest Noritz agent.
Temperature
Problems
What to do
Display Window
Hot water is not available
when a fixture is opened.
Are the gas and water supply valves fully open?
Is the water supply cut off?
(Check for the circular pattern in the Display Window.)
Is the hot water fixture sufficiently open?
Is the gas being cut off by the gas meter?
(Can other gas device such as stoves be used?)
(For LP) Is there enough gas in the tank?
(Can other gas devices such a stoves by used?)
Is the water drain valve filter clogged? (
page 23)
Is the power button (optional remote controller) turned on?
Check for the error code in the Display Window?
Is the error code "
" flashing? (page 25)
No water is available
when a fixture is opened.
Is the water supply cut off?
(Check for the circular pattern in the Display Window.)
Is the unit frozen?
The hot water at the
fixture is not the correct
temperature.
Is the hot water fixture sufficiently open?
The actual outlet water temperature is lower than the set
temperature of the unit.
Contact the nearest Noritz agent.
Water takes time to
become hot when turning
the hot water fixture.
Have you allowed enough time for the cold water in
the pipes to drain out.
