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Circuit Board Setting - Fujitsu Airstage UTY-VTGX Installation Manual

Network convertor
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Case 2: For polar 3 wire
Modify the cable as per below methods.
Use a tool to cut off the terminal on the end of the remote controller
cable, and then remove the insulation from the cut end of the cable
as shown in Fig. 1.
Connect the remote controller cable and connecting cable as shown
in Fig. 2.
Be sure to insulate the connection between the cables.
Fig. 1
White
Remote
Red
controller cable
White
Red
Black
Connect the remote controller cable to the connecting cable, and insert
it to the connector.
Connecting cable
Connector
Remote controller cable
When connecting to the exclusive terminal block
(2)
Connect the end of remote controller cable directly to the exclusive
terminal block.
Connect all the wires to the exclusive terminal block regardless of be-
ing non-polar 2 wire or polar 3 wire.
If there is the 2WIRE/3WIRE switch on the PC board of the indoor
unit, set it to match the connection method of the connected remote
controller cable.
Example) Connection of non-polar 2 wire
Terminal block
Functional earth-
ing (If necessary)
Remote controller
cable
* Layout of terminal block and
PC board is varies, depending
on the type of indoor unit.
Fig. 2
Connector
Black
Insulated
connection
Connecting
cable
Indoor unit
PCB
Terminal block
to outdoor unit /
power supply
Indoor unit
PC board
Set to "2WIRE" the
DIP switch (SW1)

8. CIRCUIT BOARD SETTING

Set network convertor rotary switch SET1, and DIP switch SET2, SET3
(1) [Rotary switch-SET1] set the refrigerant circuit address
A single network convertor is considered as a single refrigerant system,
irrespective of the number of connected single models.
In the case of multiple refrigerant system, set SET1 (×10) and SET1 (×1)
as shown in the following table for each Network convertor.
Example: When SET1 (×10) is set to "2" and SET1 (×1) is set to "0", the
refrigerant circuit address will be "20".
Rotary
Refrigerant
Switch Setting
circuit
address
SET1 (×10) SET1 (×1)
0
0
0
1
0
1
2
0
2
3
0
3
4
0
4
5
0
5
6
0
6
7
0
7
8
0
8
9
0
9
10
1
0
(2) Termination resistance setting SW (SET2-1) "Default: OFF"
Set to "ON" when there is no termination resistance in the network seg-
ment.
(3) Remote controller 2WIRE/3WIRE switching SW (SET3)
"Default: 2WIRE"
Match with the setting of the used indoor unit.
Set matched with the connection method of the remote controller cable to
be connected.
(4) Unused SW
SET2-2 to 4: Not used
All Default settings: "OFF"
Rotary
Refrigerant
Switch Setting
circuit
address
SET1 (×10) SET1 (×1)
11
1
1
12
1
2
13
1
3
14
1
4
15
1
5
16
1
6
17
1
7
98
9
8
99
9
9
(: Factory setting)
En-6

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