Noritz NH199-DV Manuel D'information De L'utilisateur page 20

Troubleshooting-2
The room does not get warm.
The heating does not operate.
The heating turns off by itself during
heating and there is no warm air.
The fan can be heard after
operation is stopped.
Rotating sound.
(low humming sound.)
The heating stops burning during
operation.
20
Heating
• Is the gas valve, return valve and supply valve fully 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?)
• Is the water drain valve filter clogged with debris? (
• Is the pressure gauge reading normal? (
• Is the power button turned on?
• See the operation manual of the indirect tank or heating system.
• Is the heating switch of a room thermostat turned on?
• Has PRIORITY 1 been running for an extensive period?
In this case, the set temperature of the aquastat
controlling the indirect tank may be higher than the set
temperature of this unit. Contact your installer.
• Can the sound of the pump be heard? If not, there may be a
malfunction. Contact your installer or a qualified service technician.
• PRIORITY 2 (Heating use) will stop even during operation
when PRIORITY 1 (Indirect tank use) operation starts.
Sounds
• These noises indicate the proper operation of devices
which are designed to let the unit reignite more quickly,
and ensure temperature of the boiler water is stable.
• The sound is from the pump operating to prevent freezing.
• The unit automatically operates the pump for several
seconds when the unit has not been used for
approximately 15 days to prevent the pump from
malfunctioning due to build-up of deposits.
Other
• Is the gas valve, return valve and supply valve fully 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?)
p.18)
p.17)
( p.11)
(Continued)