97
OCH634C
Switch
Step
Function
Operation in Each Switch Setting
Remarks
Purpose
Additional Information
ON
OFF
When to Set
SWU1 ones digit SWU2 tens digit
Rotary switch
SWU2
(tens digit)
0
1 2
3 4
5
67
89
SWU1
(ones digit)
0
1 2
3 4
5
67
89
Before turning the power ON
<Initial settings>
SWU2
(tens digit)
0
1 2
3 4
5
67
89
SWU1
(ones digit)
0
1 2
3 4
5
67
89
SW1 Digital Display Switch
1–8
1
ON OFF
2
3
4
5
6
7
8
Can be set either during operation or not.
<Initial settings>
1
ON OFF
2
3
4
5
6
7
8
SW2 Function Switch
1
Selects operating system startup
With centralized controller
Without centralized controller
Before turning the power ON
<Initial settings>
1
ON OFF
2
3
4
5
6
Turn ON when the centralized controller is connected to the outdoor unit.
SW2-1 must be turned ON if a central controller is connected to the system.
An example of this would be
a TC-24, EB50A,
AG150,
AE50 or
AE200. If SW2-1 is not turned ON, while using a central controller
, in
rare circumstances problems may be encountered such as indoor units not responding to group commands. Therefore, turning SW
-2-1 ON is
recommended if a central controller is used.
2
Connection Information Clear Switch
Clear
Do not clear
When relocating units or connecting additional units.
—
3
Abnormal
data clear switch
input
Clear abnormal data
Normal
OFF to ON any time after the power is turned on.
To delete an error history
.
4
Pump down
ON
OFF
During compressor running
To facilitate outdoor unit the pumping down operation. Frequency = Fixed to 65 Hz
I
ndoor-electronic expansion valve = Fully open
Outdoor fan step = Fixed to 10
Please refer to a section referring to the pumping down on outdoor units Installation Manuals. It might not be possible to collect all the refrigerant if the amount is excessive.
5
—
—
—
—
—
—
6
—
—
—
—
—
—
SW3 T
rial
operation
1
ON/OFF from outdoor unit
ON
OFF
Any time after the power is turned ON.
<Initial settings>
1
ON OFF
2
—
—
2
Mode setting
Heating
Cooling
—
—
SW4/ SW8 Model Switch
1–6
MODEL
SELECTION 1:ON 0:OFF
MODEL
PUMY-P200YKM1
SW4
SW8
ON OFF
1
2
3
4
5
6
ON OFF
1
2
Before the power is turned ON.
<Initial settings> Set for each capacity
.
—
—
SW5 Function switch
1
—
—
—
—
<Initial settings>
1
ON OFF
2
3
4
5
6
7
8
—
—
2
Change the indoor unit's LEV opening at startup
Enable
Normal
Can be set when of
f or during
operation
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
Auxiliary heater
Enable
Disable
OFF to ON during compressor running.
Turn ON when an auxiliary heater is connected. (It transmits a connection permission signal of
the
auxiliary heater to the connected indoor unit.)
Turn ON only when the auxiliary heater is connected and operated.
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
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.
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
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 F
AN, ST
OP
,
COOL
or thermo-OFF*
1
Active
Inactive
Can be set when OFF or during operation
<Initial settings>
To
additionally
increase
about
50
to
70
pulses
of
the
LEV
opening
higher
for
units
other
than
in
HEA
T
oper
at
ion.
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
During the outdoor unit is in HEA
T
operation, fully closes the electronic expansion valve on the indoor unit which is in F
AN, COOL, ST
OP
, or
thermo-OFF
.*
2
Enable
Normal
Can be set when OFF or during operation
To
reduce
the
room
temperature
increase
by
setting
the
LEV
opening
lower
for
the
units
in
thermo-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>
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
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
—
—
—
—
—
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
Enable
Normal
After turning the power ON.
<Initial settings>
1
ON OFF
2
3
4
5
6
To perform a test run for electrical parts alone without running the compressor
.
Make sure to connect the connectors to the compressor 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-
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.
*
2
SW5-8 Countermeasure against room temperature rise for indoor unit in F
AN, COOL, and thermo-OFF (heating) mode.
SW6-7
OFF
ON
OFF
ON
SW6-8
OFF
OFF
ON
ON
Target ETm (
:
)
9
11
6
14
SW6-6
OFF
ON
Target Pdm (kg/cm²)
29.5
31.5
