Fault Finding - Sime Format.zip Manuel De Montage, D'utilisation Et D'entretien

burner manifold unit . To clean the bur-
ner, blow in a jet of air, so as to remove
any dust particles that may have accu-
mulated.
3. Clean the heat exchanger, removing any
dust or residue from combustion. When
cleaning the heat exchanger or the bur-
ners, chemical products or steel bru-
shes MUST NOT BE USED.
Make sure that the tops of the burners
with the holes are free from encrusta-
tions.
4. Reassemble the items removed from
the boiler, making sure to follow the cor-
rect sequence.
5. Check operation of the main burner.
6. After assembly of all the gas connec-
tions, these must be tested for sound-
ness, using soapy water or appropriate
products. DO NOT USE NAKED FLAMES.
7. Do not use calcium chloride to treat the
plastic component during general main-
tenance.
4.6. 1 Chimney sweep function (fig. 24)
To carry out the verification of combustion
in the boiler turn the selector and stop on
the position ( ) until the green/orange led
starts to flash intermittently.
From that moment the boiler will start func-
tioning in heating mode at the maximum
power, with switching off at 80°C (176° F)
and restarting at 70°C (158° F).
Before activating the chimney sweep func-
tion make sure that the radiator valves or
eventual zone valves are open. The test may
be carried out also during hot-water service
functioning. To do so it is enough, after
having activated the chimney sweep func-
tion, to take some hot water from one or
more taps.
Even in this condition the boiler functions at
the maximum temperature always with the
primary controlled between 80°C ( 176° F)
and 70°C (158° F).
During the entire duration of the testing the
hot water taps must remain open. After
verifying the combustion the boiler should
be switched off by placing the selector on
the OFF position; then return the selector to
the desired function.
ATTENTION: After about 15 minutes, or
once the hot water request has been ful-
filled, the chimney sweep function auto-
matically deactivates.
4.6.2 Cleaning the filter "Aqua Guard
Filter System" (fig. 24/a)
To clean the filter, close the delivery/return
on/off taps, turn off the power to the con-
trol panel, remove the casing and empty the
boiler using the drain provided.
Place a container for collection underneath
the filter, unscrew the cap and proceed to
clean the filter, removing impurities and
limestone deposits.
Check the seal o-ring before reassembling
the cap with the filter.
Figure 24/a
4.6.3 Venting maintenance
The venting system shall be visually inspec-
ted for deterioration or deposits every 6
months it is recommended to periodically
inspected the intake and the exhaust termi-
nal for debris or snow removed from
blocking the termination.
Any dirt within the vent shall be removed
with a soft brush.
4.6.5 Fan and pump
The pump and fan don't need any lubrifica-
tion.
4.7

FAULT FINDING

The burner does not ignite and the circu-
lator is working.
1. Check that the water pressure reads 1 -
1.2 bar (14.5-17.4 psi).
2. The flowmeter is faulty, replace it.
3. The flow switch has been tripped becau-
se the heating circuit filter "Aqua Guard
Filter System" is obstructed with impuri-
ties; it needs cleaning.
Main burner does not start either to draw
off D.H.W. or for heating.
1. Check flowmeter; if necessary, replace it.
2. Check whether electric power is rea-
ching the gas valve actuator; check its
Spia lampeggiante
FLASHING
verde/arancio
GREEN/ORANGE LED
4
3
2
5
operation and, if necessary, replace it.
3. Check operation of the smoke pressure
switch.
4. The fan is operating but at low rpm, so
failing to activate the smoke pressure
switch; replace the fan.
5. Replace the electronic card.
Boiler turns on, but after 10 seconds
"locks out".
1. Check that during electric wiring the
position of line and neutral have not been
inverted.
2. The ignition/sensing electrode is faulty;
replace it.
3. The control box is faulty; replace it.
Gas valve fails to modulate in D.H.W. and
C.H. modes.
1. The sensor is interrupted; replace it.
2. The modulator has a break in winding;
replace it.
3. Check that the current to the modulator
complies with the specifications.
4. The control box is faulty; replace it.
Boiler is noisy or heat exchanger makes a
sizzling sound.
1. Check whether circulation pump P is
obstructed; if necessary clear it out.
2. Unclog impeller of circulation pump, clea-
ring away any impurities or sediments.
3. Circulation pump is burnt out or has a
lower rpm than required; replace it.
4. Check boiler output is adequate for
actual needs of heating system.
Boiler safety valve keeps tripping.
1. Flush the safety relief valve to remove
any sediment or debrit and ensure a pro-
per valve seal. If it doesn't close properly,
replace it.
2. Check system cold charge pressure is not
too high;
keep to recommended values.
3. Check whether safety valve is out of cali-
bration; if necessary, replace it.
4. Check whether the vessel is sufficiently
capacious to contain the water for the
system.
5. Check preloading pressure of expansion
ENG
FR
Figure 24
27