18
8.7
ALARMS
Alarm
type
Alarm
description
Cause
Water
flows
alarm
Lack
of
water
circulation
on
the
hydraulic
side
of
the
heating/cooling/sanitary
boiler
system.
Hydraulic
pump
is
off,
burnt,
ecc.. the
pressure
of
the
water
side
is
zero
bar.
The
faucet
for
interception
of
the
system
are
closed.
Outdoor
unit
link
alarm
A
lose
or
bad
serial
connection
between
indoor
and
outdoor
moto
‐
condensing
unit.
Electrical
connections
reversed
or
interrupted
Sensor
alarm
Bad
detection
of
the
temperature
sensor.
Cable
of
temperature
sensor
is
interrupted.
Temperature
sensor
error.
Water
antifreeze
Temperature
of
the
water
of
cooling/heating/sanitary
boiler
system
is
below
the
set
point.
Hydraulic
pump
is
off,
burnt,
etc...
Pressure
on
the
water
side
is
0
bar.
Faucets
for
the
interception
of
the
system
are
closed
8.8
ADJUSTMENT
OF
SANITARY
WATER
VALVE
To
activate
the
sanitary
hot
water
you
must:
•
connect
to
the
terminals
IA2
–G
a
sensor
which
should
be
installed
inside
the
tank,
•
connect
the
3
‐
way
switch
‐
over
valve
to
the
terminals
UD1
‐
N
(with
spring
return)
If
the
sanitary
hot
water
temperature
is
lower
than
the
set
‐
point
of
sanitary
water
(set
to
48°C
by
default)
the
unit
activates
the
3
‐
way
switch
‐
over
valve
to
deviate
the
flow
of
water
towards
the
water
tank
or
to
a
heat
exchanger.
If
the
set
‐
point
of
sanitary
water
is
reached,
the
valve
returns
in
rest
period.
Contact
UD1
N
‐
(3
‐
way
valve):
•
close:
valve
energized
and
water
flow
deviated
to
the
water
tank,
•
open:
valve
de
‐
energized
and
water
flow
deviated
to
the
user.
Commutating
from
winter
mode
operation
to
sanitary
mode
operation,
the
compressor
remains
on
and
works
under
the
set
frequency.
Commutating
from
summer
mode
operation,
the
compressor
turns
off
for
safety
period.
NOTES:
Using
the
keyboard
on
the
unit
to
turn
off
it
does
not
the
sanitary
operation
The
display
board
on
the
unit
shows:
•
In
sanitary
mode:
the
display
shows
the
temperature
measured
by
the
sensor
located
in
the
container,
•
In
heating
or
cooling
mode:
the
diplay
shows
the
outlet
water
temperature
sensor.
The
defrost
during
heating
operation
is
always
performed
on
the
user
side,
never
on
the
sanitary
water
tank.
9
MICROPROCESSOR
USER
INTERFACE
It
is
used
to
reset
the
manual
resetting
alarms.
During
the
parameters’
setting,
this
button
can
be
used
to
revert
BACK
to
the
previous
level.
It
allows
you
to
view
the
setting
menu
parameters.
UP
button:
In
the
setting
mode,
this
button
allows
you
to
move
up
to
a
higher
menu
or
to
increase
the
value
of
a
parameter
when
you
are
in
the
edit
mode.
DOWN
button:
In
the
setting
mode,
this
button
allows
you
to
shift
to
a
lower
menu
or
to
decrease
the
value
of
a
parameter
when
you
are
in
the
edit
mode.
Summary of Contents for PACK DUE 12
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Page 39: ...38 22 2 OUTDOOR UNITS 22 2 1 Wiring diagram of PACK DUE 9...
Page 40: ...39 22 2 2 Wiring diagram of PACK DUE 12...
Page 41: ...40 22 2 3 Wiring diagram of PACK DUE 16...
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