99
OCH675E
The black square (
■
) indicates a switch position.
Switch
Step
Function
Operation in Each Switch Setting
Remarks
Purpose
Additional Information
ON
OFF
When to Set
SW5 function
switch
7
While 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 F
AN, ST
OP
,
COOL
or thermo-OFF*
1
Active
Inactive
Can be set when
OFF or during operation
<Initial settings>
1
ON OFF
2
3
4
5
6
7
8
To
additionally
increase
about
50
to
70
pulses
of
the
LEV
opening
higher
for
units
other
than
in
HEA
T
oper
ation.
To
avoid
a
refr
iger
ant
shor
tage
(less
capacity)
due
to
refrigerant
liquid
accumulation
in
the units which is not in operation.
A
refrigerant
flow
noise
might
be
gene
rated
in units other than the one in operation.
8
While the outdoor unit is in HEA
T
operation, fully close the linear expansion valve on the indoor unit which is in F
AN or COOL*
2
Enable
Normal
To
reduce
the
room
temperature
increase
by
setting
the
LEV
opening
lower
for
the
indoor
units
in
FAN
or
COOL.
The refrigerant is more likely to collect in the indoor units in F
AN or COOL, which can cause refrigerant
shortage of units. (Results in less capacity and increase of discharge temperature.)
SW6 Function
switch
1
—
—
—
—
<Initial settings>
1
ON OFF
2
3
4
5
6
7
8
—
—
2
Switch of current limitation reading in a dif
ferent way
Enable
Normal
Before turning
the power ON
To lower the primary current limit by 3A. This switch is used for a single phase model with a breaker capacity 30A. (32A
is the specified value)
The performance of the unit might be somewhat reduced since the frequency would not rise enough due to the lowered current limitation.
3
—
—
—
—
—
—
4
Change of defrosting control
Enable
(For high
humidity)
Normal
Can be set
when OFF
or during operation
SW6-7
OFF
ON
OFF
ON
SW6-8
OFF
OFF
ON
ON
Target ETm (
:
)
9
11
6
14
To shorten the defrosting prohibition time in high humidity (or heavy snow) region, in order to reduce malfunctions caused by frost .
The performance of HEA
T operation is somewhat
reduced since the defrosting operation is frequently performed.
5
—
—
—
—
—
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 w
ould 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
SW7 Function
switch
1
Ignore current sensor abnormality and rotational frequency abnormality of outdoor fan motor
Enable
Normal
After turning
the power ON.*
3
<Initial settings>
1
ON OFF
2
3
4
5
6
To perform a test run for electrical parts alone without running the compressor
. Also, to perform the
troubleshooting of electrical parts without operating the outdoor unit’
s fan.
Make sur
e to connect the connector
s to
the compr
essor
after checking the electrical parts. Be careful not to get electrical shock while working on electrical parts.
2
—
—
—
—
—
—
3
—
—
—
—
—
—
4
—
—
—
—
—
—
5
—
—
—
—
—
—
6
Manual defrost
Manual
defrost
Normal
During compressor running in HEA
T
mode.
Turn ON when it is necessary to perform the defrosting operation forcedly
.
(
Ef
fective only at startup, or 10
minutes after the last defrosting operation)
It performs the defrosting operation forcedly
.
(HEA
T operation is stopped temporarily
.)
SW9 Function
Switch
1
Auto change over from remote controller
(IC with the minimum address)
Enable
Disable
Before turning the
power ON
<Initial settings>
1
ON OFF
2
3
4
Enables the indoor unit with the minimum address to select
AUT
O mode, and switches the operation
mode of the other indoor units to the same mode.
Cannot be set when the centralized control
is ON.
2
Switching the Silent/Demand mode
Demand control
Silent mode
Can be set when
OFF or during operation
—
About the Silent mode/Demand control setting, refer to "8-6. OUTDOOR UNIT
INPUT/OUTPUT
CONNECT
OR".
3
—
—
—
—
—
—
4
—
—
—
—
—
—
*
1
SW5-7 Opens the indoor-
linear
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.
*2
SW5-8 Countermeasure against room temperature rise for indoor unit in in F
AN and COOL
mode.
*3
Make sure to wait for 5 minutes after turning the breaker ON.
SW6-6
OFF
ON
Target Pdm (kg/cm²)
29.5
31.5
