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1
2
3
e
1
2
rcuito
–. "ALL 15" FAN ERROR (fig. 23/12)
scaldamento 2
. The.fan.speed.does.not.fall.within.the.
rated.speed.range..
. If.the.error.conditions.persists.for.two.
minutes,. the. boiler. activates. a. forced.
rcuito
4
scaldamento 3
stop.for.thirty.minutes..
mpianto tre
ne)
. A. new. start. attempt. is. repeated. after.
the.expiry.of.this.interval.of.time.
2
ento 2
2
ento 3
re
–. EXTERNAL PROBE ANOMALY
FLASHING" (fig. 23/13)
. When.the.external.probe.(SE).is.short-
circuited,. the. display. the. symbol.
ento 2
flashes.
..
. During. such. anomaly. he. boiler. conti-
nues.normal.functioning.
e
ento 3
tre
2
–. SAFETY THERMOSTAT INTERVEN-
ento 2
TION FIRST MIXED ZONE "ALL 20"
(fig. 23/14)
. When.it.results.that.the.ZONA.MIX.bo-
ard. is. connected. to. the. boiler. the. sa-
ento 3
fety. thermostat. intervention. switches.
2
tre
the. mixed. zone. plant. pump,. the. mix.
zone. valve. closes. and. on. the. display.
the.anomaly.ALL.20..
. During. this. anomaly. the. boiler. conti-
nues.to.function.normally..
tre
–. DELIVERY PROBE BREAKDOWN ANO-
e
MALY FIRST MIXED ZONE "ALL 21"
(fig. 23/15)
. When.it.results.that.the.ZONA.MIX.bo-
ard.is.connected.to.the.boiler.and.the.
delivery.probe.is.open.or.short.circui-
2
ted.on.the.display.the.anomaly.ALL.21.
appears..
. During. this. anomaly,. the. boiler. conti-
nues.to.function.normally..
2
zone)
–. SAFETY THERMOSTAT INTERVEN-
Circuito
4
TION SECOND MIXED ZONE "ALL 22"
riscaldamento 2
(fig. 23/16)
. When.it.results.that.the.ZONA.MIX.bo-
ard.is.connected.to.the.boiler.
. The. intervention. of. the. safety. ther-
Circuito
riscaldamento 3
mostat.switches.the.mixed.zone.plant.
(impianto tre
zone)
pump,. the. mix. zone. valve. closes. and.
on.the.display.the.anomaly.ALL.22..Du-
ring.this.anomaly.the.boiler.continues.
to.function.normally..
Fig..23/12
"
–. DELIVERY PROBE BREAKDOWN ANO-
MALY SECOND MIXED ZONE "ALL 23"
(fig. 23/17)
. When.it.results.that.the.ZONA.MIX.bo-
ard.is.connected.to.the.boiler.and.the.
delivery.probe.is.open.or.short.circui-
ted.on.the.display.the.anomaly.ALL.23.
appears..During.this.anomaly.the.boi-
ler.continues.to.function.normally..
Fig..23/13
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
–. SOLAR COLLECTOR SENSOR ANO-
MALY (S1) "ALL 24" (fig. 23/18)
.
When.the.solar.probe.is.open.or.short.
circuited,. on. the. display. the. anomaly.
ALL. 24. appears.. During. this. anomaly.
the. boiler. continues. to. function. nor-
mally.but.loses.the.solar.function.that.
is.no.longer.available.
Fig..23/14
–. SOLAR PROBE ANOMALY STORAGE
TANK (S2) "ALL 25" (fig. 23/19)
.
When.the.solar.probe.is.open.or.short.
circuited,. on. the. display. the. anomaly.
ALL. 25. appears.. During. this. anomaly.
the. boiler. continues. to. function. nor-
Circuito
riscaldamento 2
mally.but.loses.the.solar.function.that.
is.no.longer.available.
Circuito
riscaldamento 3
(impianto tre
zone)
Fig..23/15
–. AUXILIARY SENSOR ANOMALY (S3)
"ALL 26" (fig. 23/20)
.
When.the.solar.probe.is.open.or.short.
circuited,. on. the. display. the. anomaly.
ALL. 26. appears.. During. this. anomaly.
the. boiler. continues. to. function. nor-
mally.but.loses.the.solar.function.that.
is.no.longer.available.
Fig..23/16
–. ANOMALY SOLAR APPLICATION COM-
PATIBILITY "ALL 27" (fig. 23/21)
.
When. the. hydraulic. configuration. is.
not.consistent.with.the.selection.solar.
application,.on.the.display.the.anomaly.
ALL. 27. appears.. During. this. anomaly.
the. boiler. continues. to. function. nor-
mally.but.for.the.board.is.active.in.the.
solar. anomaly,. the. function. is. only.
available.antifreeze.collector.
Fig..23/17
–. COMPATIBILITY INPUT (S3) ANOMALY
ONLY FOR SYSTEM 7 "ALL 28" (fig.
23/22)
. When.a.probe.is.connected.instead.of.
a.clean.contact.on.entry.S3.the.board.
on.display.shows.the.anomaly.ALL.28..
During. this. anomaly. the. boiler. conti-
nues. to. function. normally. but. for. the.
board. is. active. in. the. solar. anomaly,.
the.function.is.only.available.antifreeze.
collector.
Fig..23/18
–. ANOMALY NUMBERS RELATED BO-
ARD "ALL 29" (fig. 23/23)
. When.one.of.the.board.ZONA.MIX/IN-
SOL.failure.or.does.not.communicate,.
the.display.shows.anomaly.ALL.29..The.
Fig..23/19
ES
ENG
Fig..23/20
Fig..23/21
Fig..23/22
Fig..23/23
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