BaltGaz NEVALUX 7224 User Manual page 30

Cod
Failure
e
Water overheating
02
Boiler doesn't work*
Draught absence
03
Boiler doesn't operate*
Lack of water pressure in
04 CH
Boiler doesn't work**
Failure of CH temperature
05 sensor.
Boiler doesn't work**
Failure of DHW
temperature sensor Boiler
06
works in heating mode
only**
Reason of failure
Electric circuit of thermo relay is
damaged (overheat sensor)
Heating system is contaminated
Failure of thermo relay (normally closed
at temperature up to 95 °С)
Air lock in the heating system
Filter is the heating system is
contaminated
Bypass valve is failed or wrong installed
Pump or air duct valve is failed
Faulty pump relay on electronic board
Gas supply regulator doesn't work
Gas supply regulator is not adjusted
Electric circuit of thermo relay is
damaged (overheat sensor)
Exhaust flue or air flow valve is
contaminated
Faulty leak-tightness of air pressure
switch tubes
Electric circuit of air pressure switch is
damaged
Faulty air pressure switch (pins of
pressure switch should close at pressure
drop from 130 Pа)
Condensate in air pressure switch tubes
Electric circuit of fan is damaged
Failure of fan
Low water pressure in CH
Air lock in the heating system
Failure of CH water pressure sensor
Failure of pump or air duct valve
Electric circuit between pressure sensor
and electronic board is damaged
Failure of CH temperature sensor
Electric circuit "temperature sensor-
electronic board" is damaged
Failure of DHW temperature sensor
Electric circuit between DHW
temperature sensor and electronic board Check electric circuit and pins
Troubleshooting
Check electric circuit and pins
Clean heating system
Replace thermo relay
Open air duct valve
16.2.2.5.
(see p. , page 34)
Clean the filter
Check proper installation of the
details of bypass valve and replace it
if necessary
Replace a pump or air duct valve
Replace electronic board
Replace gas supply regulator
Adjust gas supply regulator (see
section 11, page 22)
Check electric circuit and pins
Figure out a reason of contamination
and remove it
Replace tubes
Check electric circuit and pins
Replace air pressure switch
Remove condensate out of air
pressure switch tubes
Проверить электрическую цепь и
контакты
Replace fan
Make CH water pressure up to the
recommended value (see p.
page 19)
Open air duct valve
(see p.16.2.2.5. , page 34)
Replace a sensor
Replace pump or air duct valve
Check connector pins in the control
block and sensor and electric circuit
of a sensor
Replace CH temperature sensor
Check electric circuit and pins
Replace DHW temperature sensor
User's manual
10.1
,