User and technical staff manual
34
1 After eliminating the failure it is necessary to press the button К6 (RESET) (see p. 3.1, page 8);
2 After failure elimination the boiler is launched automatically.
Cod
e
Failure
Reason of failure
Troubleshooting
03
No draught
Boiler doesn’t operate 1
The smoke exhauster or the air inlet duct is
contaminated
Figure out the reason of
contamination and remove it .
The air pressure switch’s tubes’ air
tightness is damaged
Replace the tubes
Electric circuit of air pressure switch is
damaged
Check the electric circuit and contacts
The air pressure switch is damaged ( the
contacts of pressure switch should close at
pressure drop from 130 Pa)
Replace air pressure switch
Condensate in air pressure switch tubes
Remove condensate out of air pressure
switch tubes
Electric circuit of the fan is damaged
Check the electric circuit and contacts
The fan is out of order
Replace the fan
04
Insufficient heat carrier
pressure in the CH. Air
lock in the heating system .
The boiler doesn’t work 2
Low heat carrier pressure in the CH
Bring the heat carrier pressure in the
CH to the recommended value (see p.
10.1, page 22)
Air lock in the heating system.
Open the air outlet valve (see p.
16.2.2.5 , page 39)
The heat carrier pressure sensor of the
CH is out of order
Replace the sensor
The electric circuit between the temperature
sensor and the electronic board is damaged
Check the electric circuit and contacts
The pump or air outlet valve is out of order
Replace the pump or the air outlet
valve
05
CH temperature sensor
failure. The boiler does not
operate**
The CH temperature sensor is out of
order
Replace the CH temperature sensor
The electric circuit between the temperature
sensor and the electronic board is damaged
Check the electric circuit and contacts
06
Failure of DHW
temperature sensor Boiler
works in heating mode
only**
DHW temperature sensor is out of order
Replace the DHW temperature sensor
The electric circuit between the DHW
temperature sensor and the electronic board
is damaged
Check the electric circuit and contacts
07
Failure of modulator coil of
gas supply regulator
Boiler doesn’t work**
Broken modulator coil of gas supply
regulator
Replace gas supply regulator
(resistance of modulator coil 80 Ohm)
Electric circuit “modulator coil- electronic
board” is damaged
Check the electric circuit and contacts