94
TCH091
SW2 Function
Switch
1
Selects operating system startup
With centralized controller
Without centralized controller
Before turning
the power ON
<Initial settings>
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 SW2-1 ON is
recommended if a central controller is used. • Group setting of 2 or more
A-IC units which
is connected to branch box via centralized controller is not allowed.
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
Indoor linear expansion valve = Fully open
Outdoor fan step = Fixed to 14
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. Do not perform pump down work when there is a gas leak.
The intake of air or
other gases causes abnormally high pressure in the refrigeration cycle, which may cause explosion or injury
.
5
—
—
—
—
—
—
6
—
—
—
—
—
—
SW3 T
rial
operation
1
ON/OFF from outdoor unit
ON
OFF
Any time after the power is turned ON.
<Initial settings>
—
—
2
Mode setting
Heating
Cooling
—
—
SW2/ SW4/ SW8/ SW9
Model
Switch
1–6
MODEL
SELECTION
Before the power
is turned ON.
<Initial settings> Set for each capacity
.
—
—
SW5 Function
switch
1
—
—
—
—
<Initial settings>
—
—
2
Change the indoor unit's LEV opening at startup
Enable
Normal
Can
be
set
when
off
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
.
The black square (■) indicates a switch position.
Continue to the next page.
8-4. INTERNAL SWITCH FUNCTION TABLE
SWU2
(tens digit)
0
1 2
3 4
5
67
89
SWU1
(ones digit)
0
1 2
3 4
5
67
89
1
ON OFF
2
3
4
5
6
7
8
SWU2
(tens digit)
0
1 2
3 4
5
67
89
SWU1
(ones digit)
0
1 2
3 4
5
67
89
1
ON OFF
2
3
4
5
6
7
8
1
ON OFF
2
3
4
5
6
1
ON OFF
2
1
ON OFF
2
3
4
5
6
7
8
1
ON OFF
2
5
6
OFF
ON
PUMY
-
P250YBM
PUMY
-
P300YBM
MODEL
SW2
5
6
OFF
ON
1
2
OFF
ON
SW8
1
2
OFF
ON
1
2
3
4
5
6
OFF
ON
SW4
1
2
3
4
5
6
OFF
ON
3
4
5
6
OFF
ON
SW9
3
4
5
6
OFF
ON
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
Before turning
the power ON
<Initial settings>
—
—
SW1
Digital Display
Switch
1–8
Can be set either during operation or not.
<Initial settings>
—
—
PUMY-P250YBM2
PUMY-P300YBM2
Summary of Contents for PUMY-P250YBM2-BS
Page 23: ...23 TCH091 6 WIRING DIAGRAM ...
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