Sime RX 19 TP Mode D'emploi page 44

stat.
The.poor.voltage.of.the.thermocouple.
prevents.the.system.from.working.
4.6.6 Checking the gas valve
efficiency
Preventive. maintenance. operations.
cannot.be.performed.on.the.gas.val-
ve..Only.the.magnetic.unit.can.be.re-
placed.
Anyway,.verify.cleanness.and.remove.
any. oxidation. or. dirt. on. the. connec-
tions. between. thermopile. and. gas.
valve.and.thermocouple.and.gas.val-
ve.
4.7 TROUBLESHOOTING
The burner does not switch-on.
–. Check. that. the. gas. flow. is. regular.
and. that. air. has. been. removed.
from.the.pipes.
–..Check. that. the. pilot. nozzle. hole. is.
not.clogged.
–..Check.the.activation.operations.
The activator does not emit the
discharge.
–. Replace. the. failed. piezoelectric.
activator.
–. The.electrode.is.not.positioned.cor-
rectly. or. has. failed. and. must. be.
replaced.
–. Ensure. there. is. no. false. contact.
between. terminal. and. activator.
cable.
The pilot burner switches off when
the activation button is released.
–. Check. that. the. pilot. burner. flame.
covers.the.thermocouple.sufficien-
tly.
–..Adjust.the.gas.flow.rate.to.the.pilot.
–..Check. that. the. thermocouple. ter-
minals. are. correctly. fastened. to.
the.safety.thermostat.
–..The.safety.thermostat.is.faulty.and.
must.be.replaced.
–..Check.the.thermopile.efficiency.
–..Check.the.thermocouple.efficiency.
–..Replace.the.gas.valve.
The pilot burner does not burn cor-
rectly.
–. Check. that. the. gas. pressure. is.
regular.
–..Clean.the.primary.air.intake.hole.of.
the.pilot.burner.
–..Clean. the. pilot. filter. in. the. gas.
valve.
Bursts at the burner start and acti-
44
vation delay.
–. Check.that.the.pilot.burner.flame.is.
not.too.short.
–..Check. that. the. boiler. body. is. not.
too.dirty.
The main burner does not switch-on.
–. The. flue. safety. thermostat. has.
been.activated.(point.3.1)
–..Check.the.thermopile.efficiency.
–..Check.the.thermopile.efficiency.
–..Replace.the.gas.valve.
The boiler gets dirty easily causing
scaling of cast iron exchanger and
cutting off of smoke stat.
–..Make. sure. the. main. burner. flame.
is.well.regulated.and.the.gas.con-
sumption.is.proportional.to.the.boi-
ler.output.
–..The. boiler. is. installed. in. a. poorly.
ventilated.room..
–..Insufficient. flue. draught. or. not.
complying.with.existing.standards
–..The.boiler.operates.at.too.low.tem-
peratures,. set. the. boiler. stat. at.
higher.temperatures.
The thermostat re-ignites with too
high temperature drop.
–..Replace. the. boiler. stat. which. is.
faulty.