33
15
Defects and their removal
The defects can only be eliminated by a trained contractual service organization which is also obliged to enter the repair in the warranty
certificate.
The defects marked with symbol
“
*
„
can be eliminated by the user himself.
If the safety thermostat or the flue gases reverse flow safety device get repeatedly blocked, it is also necessary to call a contractual
service worker.
DEFECT
CAUSE
REMOVAL
After having switched-n the boiler, the
control lamp on the main switch does not
light up
No voltage on the boiler inlet
Check the voltage in the socket
Faulty control lamp
Exchange the switch
Faulty fuse
Exchange the fuse
Boiler cannot be started
– the ignition
electrode for the pilot burner ignition does
not sparkle.
Faulty automatics
Exchange the automatics
Interrupted supply to the ignition
electrode
Check the perfect connection between the electrode
and the HV output on the automatics
Faulty electrode
Exchange the electrode
Boiler cannot be started
– sparkling runs
in the automatics spark gap (discharger)
(audible sparkling sound in automatics)
-
Wrong spark gap (discharger)
setting
Adjust according to Fig. No. 3, 4
Wrong conductors connection to
electrodes or a faulty electrode
Check the electrodes condition and connection of the
igniting and earth conductor
Boiler
doesn’t ignite - the ignition
electrode is sparkling
– Hon. Ts´= 55 s;
SIT Ts´= 60 s (on the burner automatics,
the
„ALARM“ control lamp will lights up in
the automatics with signalling)
Boiler gas supply is interrupted
Check the gas pressure in gas connection
*
Check the appliance gas closure opening
Gas piping air lock
Deaerate the piping
Gas valve does not open
Replace the valve.
Boiler lit but is out immediately (on the
burner automatics, the
„ALARM“ signal
lamp of automatics with signalling lights
up)
Wrong connection between the
zero
and phase conductors
Check and exchange the connection
terminal U
– phase conductor
terminal N
– zero conductor
Wrong diameters of gas nozzles in
the burner
Check whether the nozzles diameter in the main
burner corresponds to the values in table No. 3.
Impassable filter of course
impurities on gas valve inlet
Clean the gas valve filter by blowing out (in case of
fine impurities the dimensions of which are the same
as the filter mesh diameter, the whole gas valve must
be exchanged)
Boiler cannot be ignited
– the safety
thermostat is switched off (on the control
panel in the network module, the
exceeded temperature signal lamp lights
up)
Faulty boiler thermostat
Exchange the boiler thermostat
*
Perform the thermostat unblocking at the bottom part
of the electric panel bracket after demounting of the
cladding part - TB.
Insufficient water circulation (the
pump does not work)
*
Switch over the revolutions
Check the pump operation (release the rotor)
Exchange the pump
Clogged filter in front of the pump
*
Clean the filter
Lack of water in the system
*
Check the water pressure in the system and, if
needed, refill water
Check the pressure in the expansion tank (if a closed
heating system is used)
*
Check the three-way valve
(if the hot water heating is connected)
Boiler does not switch over between the
nominal and low power at the
temperature set on the outdoor
thermostat and the low power switch is in
position
“I”
(only at the boiler equipped
with double stage gas valve)
Faulty outdoor thermostat
If needed, exchange the outdoor thermostat
Interrupted connection between the
outdoor thermostat and the boiler
Check the connection
Faulty High-Low coil
Exchange the coil
A stack hot water heater is connected to
the boiler according to the recommended
diagram and the hot water heating
isn’t
being performed preferentially
Faulty connection of Honeywell V
4044F three-way valve
Check the valve connection
– see fig. No. 17
Faulty three-way valve
Replace the valve.
A stack hot water heater is connected to
the boiler according to the recommended
diagram and hot water heating
isn’t
heated to the required temperature or it
does not show the required temperature
Wrong temperature setting on the
thermostats
*
Change the setting see chap. No. 11
Faulty heater thermometer or
thermostat, or the boiler thermostat
Exchange the faulty safety or regulation element
The flue gases reverse flow safety device
is blocked
Clogged chimney
Clean the chimney
Clogged the flue gas ducting output
end (at the boilers equipped with
flue-gases ventilator)
Check, unblock the flue gases reverse flow safety
device
A strong wind inducing the
counterpressure
*
unblock the flue gases reverse flow safety device by
using the "RESET" button
in the network module.
