98
OCH675E
The black square (■) indicates a switch position.
Continue to the next page.
8-5. INTERNAL SWITCH FUNCTION TABLE
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-linear 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
MODEL
PUMY-P200YKM2
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
—
—
—
—
—
—
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.
1
ON OFF
2