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from.the.electrodes.
–. Loosen. the. fixture. screw. (A. fig..
16). of. the. electrodes. support. and.
remove.it.
–. Block. the. spray. door. using. a. n°19.
spanner. and. unscrew. the. nozzle.
with.a.n°16.spanner.(fig..17).
4.8
FAULT FINDING.
There. follow. a. list. of. some. reasons.
and.the.possible.remedies.for.a.series.
of. faults. which. could. happen. causing.
a. failure. or. an. irregular. function. of.
the.appliance..A.function.fault,.in.most.
cases,. causes. the. "lock. out". signal.
on.the.control.panel.to.turn.on..When.
this.light.turns.on,.the.burner.can.only.
function. again. after. the. reset. button.
84
A
has.been.pressed;.once.this.has.been.
done.and.a.regular.ignition.occurs,.the.
failure.can.be.defined.momentary.and.
not.dangerous..
On.the.contrary,.if.the."lock.out".per-
sists,. then. the. cause. of. the. fault. as.
well.as.the.remedy.must.be.looked.for.
in.the.following.faults:
The burner does not ignite
–. Check.the.electric.connections.
–. Check. the. regular. fuel. flow,. the.
cleanness.of.the.filters,.of.the.noz-
zle.and.air.vent.from.the.tube.
–. Check. the. regular. spark. ignition.
and.the.proper.function.of.the.burn-
er.
The burner ignites regularly but the
flame goes out immediately
–. Check. the. flame. detection,. the. air.
calibration. and. the. function. of. the.
Fig..17
appliance..
Difficulty in regulating the burner
and/or lack of yield
–. Check:.the.regular.flow.of.fuel,.the.
cleanness. of. the. boiler,. the. non.
obstruction. of. the. smoke. duct,. the.
real. input. supplied. by. the. burner.
and.its.cleanness.(dust)..
The boiler gets dirty easily
–. Check.the.burner.regulator.(smoke.
analysis),.the.fuel.quantity,.the.flue.
obstruction.and.the.cleanness.of.the.
CORRETTA POSIZIONE ELETTRODI
CORRECT.POSITION.ELECTRODES
air.duct.of.the.burner.(dust).
The boiler does not heat up
–. Control. the. cleanness. of. the. shell,.
the. matching,. the. adjustment,. the.
burner. performances,. the. pre-
adjusted. temperature,. the. correct.
function.and.position.of.the.regula-
tion.stat.
–. Make. sure. that. the. boiler. is. suf-
ficiently.powerful.for.the.appliance.
Smell of unburnt products
–. Control. the. cleanness. of. the. boiler.
shell. and. the. flue,. the. airtightness.
of. the. boiler. and. of. the. flue. ducts.
(door,.combustion.chamber,.smoke.
ducts,.flue,.washers).
–. Control.the.quality.of.the.fuel.
Frequent intervention of the boiler
shutoff valve
–. Control. the. presence. of. air. in. the.
system,.the.function.of.the.circula-
tion.pumps.
–. Check. the. load. pressure. of. the.
appliance,. the. efficiency. of. the.
expansion.tanks.and.the.valve.cali-
bration.
Fig..16
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