Viadrus GRAND G 36, Manual For Operation And Installation

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15. Defects and their elimination
The defects can only be eliminated by a trained contractual service organization which is also obliged to enter
the repair in the guarantee certificate.
The defects market with symbol “
∗∗∗∗
„ can be eliminated by the user himself.
If the safety thermostat or the combustion products return flow fuse get repeatedly blocked it is also
necessary to call a contractual service worker.
DEFECT REASON ELIMINATION
1. After having switched on 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
Faulty fuse Exchange the switch
Exchange the fuse
2. Boiler cannot be started – the
ignition electrode for pilot burner
ignition does not sparkle.
Faulty automatics Exchange the automatics
Interrupted inlet to the ignition Check the perfect connection between the
electrode and the HV output to the
automatics
Faulty electrode Exchange the electrode
3. 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. 2
Wrong conductors connection to
electrodes or a faulty electrode Check the electrodes condition and
connection of ignition and earth conductor
4. Boiler doesn’t ignite - the ignition
electrode is sparkling– Hon. Ts´=
50 s; (on the burner automatics
the „ALARM“ control lamp lights
up
in the automatics with
signalisation)
Boiler gas supply is interrupted Check the gas pressure in gas connection
* Check the appliance gas closure opening
Gas piping air lock Bleed the piping
Gas valve does not open Valve exchange
5. Boiler lit but is out immediately
(on the burner automatics the
„ALARM“
signal lamp of
automatics with signalisation 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 burner Check whether the nozzles diameter in
the main burner corresponds to the values
in tables no. 2.
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)
6. Boiler cannot be ignited– the
safety thermostat switched off (on
the control panel in the network
module the exceeded temperature
signal lamp lights up) Faulty boiler thermostat Exchange the boiler thermostat
* Unblock the thermostat in network module
- TB
Insufficient water circulation
(the pump doe not work) * Switch over the revolutions
Check the pump operation (release the
rotor)
Exchange the pump
filter clogged before the pump * Clean the filter
Lack of water in the system * Check the water pressure in the system
and possible water refilling
Check the pressure in the expansion tank
(if a closed heating system is used)
* Check the three-way valve
(if the HWS heating is connected)
8. To the boiler there is connected
the stack HWS heater according
to the recommended diagram and
the
HWS isn’t heated
preferentially
Faulty connection of Honeywell
V 4044F three-way valve Check the valve connection – see fig.no.
15
Faulty three-way valve Exchange the valve
9. To the boiler there is connected
the stack HWS heater according
to the recommended diagram and
HWS 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
10. The combustion products return
flow fuse blocked
Clogged chimney Clean the chimney
A strong wind inducing the
counter-pressure * unblock the combustion products return
flow fuse by using the "RESET" button in
the network module.