Noritz NC250-SV-ASME Guide De L'utilisateur page 24

Troubleshooting-2
The light on the power button
does not come on.
The water temperature changes
after a power failure or when the
power is disconnected.
The plastic on the surface or buttons
of the remote controller has torn,
peeled, or air bubbles inside.
The fan can be heard after
operation is stopped.
A motor can be heard when turning
the unit ON or OFF, when opening
or closing a fixture, or after the unit
has been running for a while.
[NC250-SV-ASME only]
The fan can be heard when it is
very cold outside.
The heater stops burning during
operation.
White smoke comes out of the
exhaust vent on a cold day.
24
Remote Controller
• Has there been a power failure?
• Is the power connected properly?
• The temperature setting and the flow meter alarm setting
may both need to be reset after a power outage.
• The surface of the remote controller is affixed with a
protective sheet (to prevent surface scratching, etc.) at
time of shipment. This sheet can be removed or left as it
is. When leaving the protective sheet on, areas frequently
touched may tear or peel. However, the remote controller
will not malfunction from water entering such torn or
peeled areas. To restore the appearance of the remote
controller surface, simply remove the protective sheet.
Sounds
• These noises indicate the proper operation of devices
which are designed to let the unit reignite more quickly,
and ensure the water temperature is stable.
• The fan may run to prevent freezing.
Other
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture 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?)
• This is normal. The white smoke is actually steam.
(Continued)