maly.of.the.D.H.W..sensor.(ST)..When.
the.D.H.W..sensor.is.open.or.short.cir-
cuited,. the. display. will. show. anomaly.
ALL.10..The.boiler.will.function.but.will.
not.modulate.power.for.the.D.H.W.
BOILER.ONLY.FOR.HEATING:.antifre-
eze.sensor.anomaly.for.boilers
.
which.
foresee.the.use.of.antifreeze.sensors.
. When.the.sensor.is.open.or.short.cir-
cuited,.the.boiler.loses.part.of.its.anti-
freeze. functions. and. the. display. will.
show.anomaly.ALL.10.
–. THREE-ZONE SYSTEM CONFIGURA-
TION ANOMALY “ALL 32” (fig. 15/26)
. When.the.boards.connected.to.the.RS-
485.are.not.enough.and/or.at.least.one.
of.them.it.is.not.mixing.zone.board,.the.
boiler.stops.and.anomaly.ALL.32.is.di-
splayed..
. The. boiler. restarts. when. the. boiler.
three-zone.system.configuration.is.ac-
tivated..
–. RS-485 BOARD COMMUNICATION
ANOMALY IN MODBUS MODE “ALL 33”
(fig. 15/27)
. When.PAR.16.is.different.from.“-.-”and.
there. is. no. communication. between.
the. boiler. board. and. the. RS-485. bo-
ard.in.MODBUS.mode.for.at.least.four.
minutes,.the.boiler.stops.and.anomaly.
ALL.33.is.displayed..
. The.boiler.restarts.when.communica-
tion.is.restored.or.when.PAR.16.=.“-.-”.
is.set.
94
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig..15/26
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig..15/27
