Hi
‐
T
Centralized
controller
33
4.8
FAULT
DIAGNOSTIC
4.8.1
ACTIVE
ALARMS
You
can
view
the
current
alarms
of
the
connected
units.
To
do
this,
from
the
home
page,
press
the
triangle
icon
of
danger,
if
present;
from
here
you
can
access
to
the
list
of
all
active
alarms
in
the
system.
Also,
when
you
are
in
an
unit
page
(i.e.
Chiller
page,
see
Paragraph
3.4.1,
and
fan
coil
page,
see
Paragraph
3.4.2),
by
pressing
the
triangle
that
appears
on
the
machine,
you
go
to
a
menu
where
you
can
see
current
alarms
of
the
selected
machine.
4.8.2
ALARM
HISTORY
The
keyboard
manages
a
detected
alarms
list
for
all
the
plant
that
shows
the
date
and
time
of
the
alarm,
the
affected
machine
and
alarm
type.
In
the
historic
are
stored
up
to
100
alarms,
once
exceeded
the
limit,
it
automatically
deletes
the
older
alarms.
To
go
to
the
alarm
history:
from
the
system
main
page,
go
into
"
Configuration
"
‐
>
"
Service
menu
"
‐
>
"
Alarm
list
".
Having
maintainer
password,
you
can
set
that
the
alarm
history
is
also
accessible
from
the
user
menu;
to
do
this
go
into
"C
onfiguration
"
‐
>
"
Service
menu
"
‐
>
"
Parameters
"
‐
>
"K
eyboar
d"
‐
>
Par
33/44:
Enable
user
alarm
log
=
1
.
4.9
DOUBLE
SET
‐
POINT
AND
DEHUMIDIFICATION
FUNCTIONS
The
double
set
‐
point
function
introduces
a
second
plant
side
set
‐
point
(both
in
cooling
mode
and
in
heating
mode).
The
application
field
is
primarily
that
of
the
floor
cooling
assisted
by
fan
coil
for
dehumidification.
The
purpose
of
the
application
is
to
prevent
in
any
condition
the
formation
of
condensation
on
the
floor,
and
in
any
case
to
ensure
the
welfare
thermo
hygrometric.
The
activation
of
the
double
set
‐
point
is
by
means
of
maintainer
parameters
(from
System
main
page
‐
>
Configuration
‐
>
Service
menu
‐
>
Parameters
‐
>
Chiller
‐
>
Chiller
name
‐
>
H82:
Enable
second
setpoint
≥
2
,
ref.
chiller
manual
for
allowable
values).
Must
also
be
set
a
digital
output
for
controlling
the
three
‐
way
valve
used
to
divert
the
flow
of
water
between
the
floor
and
fan
coils.
The
function
of
humidistat
is
instead
carried
out
directly
by
the
remote
control
Hi
‐
T,
by
means
of
its
integrated
sensors
and
the
logic
internally
implemented
related
to
the
control
of
dew
point
and
dehumidification.
Please
refer
to
the
manual
of
the
chiller
for
the
correct
setting
of
parameters
related
to
the
double
set
‐
point,
as
well
as
for
the
electrical
connections
to
be
done
in
the
terminal
board
of
the
chiller.
The
set
‐
points
can
be
set
with
double
set
‐
point
function
enabled
are:
Setpoint
Setpoint
on
Hi
‐
T
Setpoint
onboard
control
panel
Summer
Winter
First
setpoint
(°C)
T
water
Coo/Hea
7
(5÷18)
45
(35÷55)
First
setpoint
eco
(°C)
T
eater
ECO
12
(5÷18)
40
(35÷55)
Second
setpoint
(°C)
T2
water
Co2/He2
18
(7÷23)
35
(25÷45)
Second
setpoint
eco
(°C)
T2
water
ECO
23
(7÷23)
30
(25÷45)
Table
6.
Set
point
settings
with
enable
double
set
point.
To
manage
the
setpoint:
•
from
Hi
‐
T
→
“
Set
‐
point
setup
”
menu
‐
>
“
Chiller
”
‐
>”
Summer
”
o
“
Winter
”
(see
Paragraph
0).
•
from
on
‐
bard
control
panel
→
SET
button.
The
second
setpoint
is
greater
than
the
first
set
point
in
summer
and
lower
in
winter:
•
in
summer:
T
2
≥
T
•
in
winter:
T
2
≤
T
The
parameters
to
be
set
for
the
management
of
dehumidification
are
accessible
from
the
maintenance
menu
(
Configuration
‐
>
Service
menu
‐
>
Parameters
‐
>
K
eyboard
):
Parameter
Name
Unit
Default
Min.
Max.
Par
42/44
Dew
‐
point
temp.
margin
°C
5.0
0.0
50.0
Par
43/44
Min.
staying
time
in
dehumidification
Seconds
300
0
600
Par
44/44
Max.
staying
time
in
dehumidification
Seconds
600
0
1200
Table
7.
Service
keyboard
parameters
for
dehumidification.
Summary of Contents for HI-T
Page 55: ......
