Fault Finding - Sime RS Mk.II Serie Instrucciones Para El Instalador Y El Usuario

4.5 TRANSFORMATION TO
ANOTHER TYPE OF GAS
A kit is supplied containing everything requi-
red for transformation to butane gas (G30)
or propane gas (G31) .
Transformation from one type of gas to
another requires replacement of the main
nozzles and the conical spring (1, fig. 22).
Proceed as specified in point 4.2. 1 to adjust
operating pressures.
When finished, apply the plate provided in
the kit for identification of the gas for which
the boiler is set up to the skirt.
NOTE: All gas connections must be tested
for seal using soapy water or products
intended for the pur pose after assembly.
DO NOT USE OPEN FLAME.
4.6 CLEANING AND
MAINTENANCE
At the end of the heating season, perform
boiler cleaning and maintenance as follows
(fig. 23):
– Turn off the power supply to the electri-
cal panel.
– Remove the skirt door (2) and base-
board (1).
– Unhook the upper front panel (3) and
hook it to the pins below it.
– Remove the cover (6).
– Remove the screw holding each burner
(7) in place and remove the burner from
the combustion chamber.
– Remove the screws holding the upper
inside panel (4) in place.
– Remove the screws holding the cleaning
panel in place (5).
– Clean the flue gas passageways with a
KEY
1 Baseboard
2 Door
3 Upper front panel
4 Upper front wall
5 Flue gas chamber cleaning plate
6 Cover
7 Burner
66
brush.
– Next clean the burners, blowing air
through them under pressure.
– Check the positioning and wear of elec-
trodes.
– Clean the stack union and check the effi-
ciency of the flue.
– After assembly, test the seal of all gas
connections using soapy water or a pro-
duct manufactured for the purpose. Do
not use open flame.
Preventive maintenance and control of
the functioning of the device and its
safety systems must be performed exclu-
sively by authorised technical service
technicians.
4.7

FAULT FINDING

The power supply to the ring is on but the
boiler does not start.
– Check the gas supply to the boiler.
– Check that the safety and control ther-
mostats are closed.
– Gas is not reaching the pressure switch.
– Check that the electronic device is
working, and replace it if necessary.
The boiler comes on and goes off conti-
nually, as does the red gas pressure swit-
ch indicator light.
– Check the pressure drop of the gas
mains when the boiler starts up. The
dynamic pressure value at the gas valve
inlet must be no less than 9.7 mbar.
– Check the gas line.
– Check for load loss in any solenoid valves
or safety devices installed upstream of
the gas assembly.
– Check gas pressure switch setting and
functioning, and replace the switch if
necessary.
The ignition electrode discharges but the
burner is not ignited.
– There may be air in the pipe the first time
the burner is turned on for the first time
or if it has been inactive for a long time.
– Check whether the rectifier card in the
connector supplying the gas solenoid
valve is functioning, and replace it if
necessary.
– The valve coil's electrical winding is inter-
rupted; it must be replaced.
The ignition electrode does not discharge.
– The electrical cable is interrupted or is
not properly fastened to terminal 10.
– The device's transformer has burnt out
and must be replaced.
No flame detection.
– The phase and neutral positions on the
terminal board have not been complied
with.
– Check if the ground wire is connected.
– The electrode cable is interrupted or not
correctly fastened to terminal 8.
– The detection electrode is grounded.
– The electrode is very worn or its ceramic
guard has been ruined. It must be replaced.
– The device is faulty and must be replaced.
– Phase/phase electrical lines may require
application of a transformer, code
6239700.
The boiler works only at the rated pressure
and does not permit pressure reduction.
– Check for voltage at the ends of the coil.
– The coil and winding are interrupted and
must be replaced.
– The rectifier card supplying the coil is
interrupted and must be replaced.
– There is not differential between the set-
tings of the two contacts on the control
thermostat. It must be replaced.
– Check the setting of the reduced pressu-
re control screw on the coil assembly (4,
fig. 21).
The boiler goes out easily and creates
condensation.
– Check that the main burner flame is adju-
sted correctly and that gas consumption
is proportionate to boiler power.
– Poor ventilation in the room in which the
boiler is installed.
– Flue has insufficient draught or does not
meet requirements.
– The boiler is working at temperatures
which are too low. Adjust the boiler ther-
mostat to a higher temperature.
The thermostat turns the boiler on again
with a temperature difference which is
too high.
Fig. 23
– Replace the control thermostat; it is
incorrectly set.