103
OCH668B
The black square (
■
) indicates a switch position.
1
ON OFF
2
3
4
5
6
7
8
Switch
Step
Function
Operation
in
Each
Switch
Setting
Remarks
Purpose
Additional Information
ON
OFF
When to Set
SW5
Function
switch
1
Demand control setting for
Australia
Australia setting
Normal*
1
Can be set
when
of
f
or during
operation
<Initial settings>
Turn ON to activate the demand control for
Australia.
(Do not turn this ON if the unit is in outside
Australia)
2
Change
the
indoor
unit's
LEV
opening
at
startup
Enable
Normal
To set the LEV opening at startup higher than usua
l.
(+150 pulses)
To improve the operation with the LEV
almost clogged.
The refrigerant flow noise at startup become louder
.
3
—
—
—
—
—
—
4
—
—
—
—
—
—
5
Change
the
indoor
unit's
LEV
opening
at
defrost
Enable
Normal
Can be set
when
OFF
or during
operation
To set the LEV opening higher than usual during defrosting operation.
(Only Qj
[
10 is valid, + 300
pulses)
To avoid the discharge temperature increase
and provide efficient defrosting operation.
The
refrigerant
flow
noise
during
the
defrosting
operation
become
louder
.
6
Switching
the
target
sub
cool
(Heating mode)
Enable
Normal
Can be set when OFF or during operation
To decrease the target sub cool value.
To reduce the discharge temperature decrease due to refrigerant liquid accumulation in the units.
A refrigerant flow noise might be generated if the sub cool value is too small.
7
During the outdoor unit is in HEA
T operation,
additionally increase about 50 to 70 pulses of the LEV opening on the indoor unit which is in FAN, ST
OP
, COOL
or thermo-OFF*
2
.
Active
Inactive
To additionally increase about 50 to 70 pulses of the LEV
open
ing for uni
ts other tha
n i
n HEA
T operati
on.
To av
oid a
refrigerant shortage (less capacity) due to refrigerant liquid
accumulation in the units which is not in operation.
A
refrigerant
flow
noise
might
be
generated
in
units
other
than
the
one
in
operation.
8
During the outdoor unit is in operation, fully closes the electronic expansion valve on the indoor unit which is in F
AN,
COOL, ST
OP
, or thermo-OFF
.*
3
Enable
Normal
Before turning the
power ON.
T
o reduce the room temperature increase by setting
the LE
V opening low
er for the units in ther
mo-
OFF
operation.
The refrigerant is more likely to collect in the units with thermo-OFF operation, and causing the units refrigerant shortage. (Results in less capacity and increase of discharge temperature.)
SW6
function
switch
1
—
—
—
—
<Initial settings>
—
—
2
—
—
—
—
—
—
3
—
—
—
—
—
—
4
Change of defrosting control
Enable (For high humidity)
Normal
Can be set
when
OFF
or during
operation
To shorten the defrosting prohibition time in high humidity
(or heavy snow) region, in order to reduce malfunctions caused by frost .
The performance of the HEA
T operation is somewhat reduced
since the defrosting operation is frequently performed.
5
External
static
pressure
mode
Enable
Normal
To raise the fan rotation to raise the performance when an external static pressure is applied.
It can support the external static pressure up to 30 Pa.
The power input and the sound level become larger due
to increasing the outdoor unit’
s fan rotation.
6
Switching
the
target
discharge
pressure
(Pdm)
Enable
Normal
To raise the performance by setting the PDm higher during HEA
T operation.
Power consumption is raised due to a higher frequency
.
(The performance would not be raise at the maximum operating frequency
.)
7
Switching (1) the target evaporation temperature (ETm)
Enable
Normal
To raise/reduce the performance by changing the target ETm during COOL
operation.
Switch to raise the performance: raises the performance Switch to reduce the performance: prevents dew condensation
Switching it to raise the performance, it raises the power consumption, and produces more dew condensation. Switching it to reduce the performance, it makes the performance insufficient.
8
Switching (2) the target evaporation temperature (ETm)
Enable
Normal
1
ON OFF
2
3
4
5
6
7
8
SW6-6
OFF
ON
Target Pdm (kg/cm²)
29.5
31.5
SW6-7
OFF
OFF
ON
ON
SW6-8
OFF
ON
OFF
ON
Target ETm (
:
)
9
11
6
5
Note:
The target ETm varies according to
an
intake
temperature.
Continue
to
the
next
page
*
1
Refer to "8-4. OUTDOOR UNIT
INPUT/OUTPUT
CONNECT
OR".
*
2
SW5-7
Opens
the
indoor-
electronic
expansion
valve
as
a
countermeasure
against
the
indoor
unit
in
F
AN,
COOL,
ST
OP
, or
thermo-OFF
operation
with
refrigerant-shortage
status
due
to
an
accumulation
of
liquid
refrigerant
in
the
indoor
unit.
*
3
SW5-8
Countermeasure
against
room
temperature
rise
for
indoor
unit
in
F
AN,
COOL,
and
thermo-OFF
(heating)
mode.
*
4
During
heating
operation
and
the
ambient
temperature
is
4
:
(39°F)
or
below
, the
freeze
prevention
heater
is
energized.
*
5
During
heating
mode
is
OFF
(include
thermo-OFF
in
cooling
mode),
and
the
ambient
temperature
is
4
:
(39°F)
or
below
, the
freeze
prevention
heater
is
energized.
