User’s manual
Cod
e
Failure
Reason of failure
Troubleshooting
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 electric circuit and pins
* After troubleshooting it is necessary to push a button К6 (RESET)
(see p.
3.1
, page7);
** After troubleshooting boiler starts up automatically.
14.2 Other failures
Failures that don’t have any code are displayed on the boiler’s control panel (see p.
3.1
, page7) as follows:
Table 5
Failure
Reason of failure
Troubleshooting
Boiler doesn’t switch on
Lack of electricity
Address to the service
Fuse is burnt
Replace fuse on the board
Water entry on the electronic board
Dry the board by means of warm air or leave
it for 2 days in a dry place for full ware
evaporation
Electronic board failure
(RESET doesn’t help)
De-energize and re-start boiler
Replace electronic board
Claps in burner
Minimal gas pressure and ignition
power are wrong adjusted
Adjust minimal gas pressure (see p.
11.4
, page
23) and ignition power “P0” (see p.
13.3.1
,
page 26)
Lack of air supply
Clean a tube or air duct valve
Electrode spark of ignition plug slips
on the edge of burner section or the
shell of combustion chamber
Bend the ignition plug or shell of combustion
chamber allowing a spark to slip on the
aperture area of the nozzles of burner section
Burner block is contaminated
Clean burner block
(see p.
16.1.1
, page 32)
Smell of gas
Gas leakage
Check all the gas line on air-tightness (see
p.
8.2
, page13),
Remove gas leakage
Little hot water output
or its absence
Lack of inlet DHW water pressure
Address to the Housing and Public utilities
service
Water filter is contaminated
Clean the filter on DHW line
Heat exchanger is contaminated
Clean heat exchanger
(see p.
16.1.3
, page 33)
Set hot water temperature
is not maintained
(too high)
High temperature of inlet water
Increase water flow through DHW or mix
how water with cold and don’t let flow
reduce through DHW
Little water flow through DHW line
Increase water flow through DHW
Boiler doesn’t work in
CH mode
(but works in DHW)
Jumper of the room thermostat is
absent
Install a jumper of the room thermostat
Room thermostat’s jumper connecting
pins 28 and 29 is failed (см. Annex
III
, page 53)
Replace a jumper of a room thermostat
Failure of room thermostat (if it is
installed)
Replace a room thermostat
Inlet water temperature
in the heating system is
lower than the set one
Failure of CH temperature sensor
Clean temperature sensor from scale (if dip
temperature sensor is used)
Replace temperature sensor
