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Marine Air Systems vector compact - Page 20

Marine Air Systems vector compact
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U
3
LOW
FAN
SPEED
LIMIT:
The
low
fan
speed
limit
determines
the
lowest
output
allowed
for
the
low
fan
speed.
The
range
of
values
is
30
through
55
in
arbitrary
units.
The
factory
default
is
50.
Both
the
high
and
low
fan
limits
may
be
adjusted
as
follows:
While
the
system
is
off,
start
the fan
by
pressing
and
holding
the
FAN
button
until
the
number
"1"
appears
in
the
display.
Enter
the
program
mode
while
the
fan
is
running
and
select
"U2"
or
"U3".
Raising
and
lowering
the
fan
limits
while
the
fan
is
running
allows
the
programmer
to
experience
fan
speed
changes
as
they
are
made.
Once
the
high
and
low
fan
speed
limits
are
set,
the
system
will
automatically
reprogram
itself
to
produce
six
equally
spaced
fan
speeds
between
them.
U
4
COMPRESSOR
STAGING
TIME
DELAY:
The
compressor
staging
time
delay
is
provided
for
use
where
more
than
one
a/c
system
is
being
operated
from
the
same
power
source.
Setting
the
staging
delays
at
different
intervals
allows
for
only
one
compressor
to
start
at
a
time
to
lessen
the
amperage
load
on
the
power
source.
The
minimum
delay
is
five
(5)
seconds
and
the
maximum
is
one
hundred
thirty
five
(135)
seconds.
The
factory
default
setting
is
fifteen
(15)
seconds
for
reverse
cycle
units
or
one
hundred
thirty
five
(135)
seconds
for
units
with
no
heat
option
installed.
U
5
TEMPERATURE
CALIBRATION:
Use
this
feature
to calibrate
the
air
sensor
within
a
range
of
±
10°F.
The
factory
default
is
0°F.
U
6
COMPRESSOR
FAIL-SAFE
PROTECTION:
This
feature
is
provided
to
monitor
the
refrigerant
circuit.
When
a
high
head
pressure
condition
occurs
the
display
will
flash
"HHH",
when
the
refrigerant
system
is
low
on
pressure
"PPP"
will
flash
only
if
the
optional
low
pressure
switch
is
installed.
This
display
indicates
that
the
system
requires
maintenance.
See
the
troubleshooting
guidelines
in
this
manual.
The
factory
default
is
three
(3).
The
four
parameter
settings
are:
Zero
(0):
Turns
off
all
protection,
no
action
is
taken
and
no
message
displayed.
One
(1):
No
message
displayed
with
90
seconds
between
continuous
restarts.
Two
(2):
Message
displayed
with
90
seconds
between
continuous
restarts.
Three
(3):
Message
displayed
with
three
90
second
restarts,
manual
reset
is
required.
U
7
FAHRENHEIT
OR
CELSIUS
TEMPERATURE
DISPLAY:
The
PASSPORT
II
can
display
temperature
in
either
degrees
Fahrenheit
(°F)
or
degrees
Celsius
(°C).
Setting
to
zero
(0)
displays
°F
and
setting
to
one
(1)
displays
°C.
The
factory
default
is
zero
(0).
U8
NOT
USED
U
9
REVERSED
FAN
SPEEDS
DURING
HEATING:
During
normal
operation
in
the
cooling
mode
with
the
fan
speed
set
to
"A"
(automatic),
the
fan
speed
is
reduced
as
the
set
point
temperature
is
approached.
During
heating,
this
is
not
always
the
preferred
method
of
operation.
When
this
parameter
is
set
to
one
(1),
the
fan
speed
will
increase
as
the
set
point
is
approached
during
heating.
This
will
reduce
head
pressure
by
increasing
airflow
across
the
coil
as
the
set
point
is
approached.
Setting
the
parameter
to
zero
(0)
will
cause
the
fan
speed
to
decrease
as
the
set
point
is
approached
during
heating,
as
it
does
in
the
cooling
mode.
The
factory default
is
one
(1).
U10
CONTINUOUS
FAN
OPERATION
OR
CYCLE
FAN
WITH
COMPRESSOR:
The
fan
can
be
programmed
to
run
continuously
while
the
system
is
on,
or
can
be
allowed
to
cycle
with
the
compressor.
When
cycled
with
the
compressor,
the
fan
will
only
operate
when
cooling
or
reverse
cycle
heating
is
called
for.
To
cycle
the
fan
with
the
compressor,
select
zero
(0).
To
operate
the fan
continuously,
select
one
(1).
The
factory
default
is
one
(1).
16

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