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30
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'11 • KX-T-166
The communication protocol can be choosen from following two types. One of them is the conventional Superlink (hereinafter previous SL) and the other is the new Superlink
Ⅱ
(hereinafter new SL) . These two communication protocols have the following advantages and restrictions, so please choose a desirable one meeting your installation conditions
such as connected indoor units and centralized controller. When signal cables are connected into a network involving outdoor units, indoor units or centralized control equipment
that do not support new SL, please select communications in the previous SL mode, even if the refrigerant system is separated from theirs.
Signal line
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor signal line
terminal block
Indoor signal line
terminal block
○
Loop wiring prohibited.
The signal lines cannot form a
loop, so the wirings shown as .......
in the diagram are prohibited.
Important
●
Connect the signal line between indoor unit and outdoor unit to A1 and B1.
●
Connect the signal line between outdoor units to A2 and B2.
●
Please use a shielded cable for a signal line and connect a shielding earth at all the indoor units and outdoor units.
●
Signal cables are for DC 5 V. Never connect wires for 220/240 V or 380/415 V.
Protective fuse on the PCB will trip.
①
Confirm that signal cables are prevented from applying 220/240 V or 380/415 V
②
Before turning the power on, check the resistance on the signal cable terminal block. If it is less than 100Ω, power supply cables may be connected to the signal cable
terminal block.
If the resistance value is less than 100Ω, disconnect the signal cables temporarily to divide to more than one network, to reduce the number of indoor units on the same
network, and check each network
Outdoor unit setting (SW5-5)
No. of connectable indoor units
No. of connectable outdoor unitsin a network
No. of connectable outdoor units
Signal cable (furthest length)
Connectable units to a network
ON
Max. 48
Max. 48
Up to 1000m
Up to 1000m
Units not supporting new SL (FD A
KXE4 series)
Units supporting new SL (FD
KXE6 series)
Can be used together.
OFF (Factory default)
Max. 128
Max. 32
Up to 2,000 m for wires other than shielding wire
Up to 1,500 m for 0.75 mm
2
shielding wire (MVVS)
Up to 1,000 m for 1.25 mm
2
shielding wire (MVVS)
Up to 1000m
Units supporting new SL (FD
KXE6 series)
Conventional communication protocol (previous SL)
Communication protocol
New communication protocol (new SL)
Note: For FDT224 and 280 models, calculate the number of units taking 1 indoor unit as 2 units for the sake of communication.
Network connector
●
Fix the cables not to exert external force to the terminal connection.
Indoor and outdoor units signal cables
Power cable and signal cable connection
6-3. How to connect signal cables
(1) When one outdoor unit is used.
(1) The signal lines can also be connected using the method shown below.
○
Indoor and outdoor signal lines do not have a polarity.
Any of the connections in the following illustration can be made.
●
Give adequate slack to cables in fastening them.
Wiring clamp
(2) When plural outdoor units are used
Outdoor unit
Outdoor unit
Network connector
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
A1∙B1
A2∙B2
A1
B1
A1
A1∙B1
A
B
A
B
A
B
A
B
A
B
A
B
A2∙B2
A1∙B1
A2∙B2
Refrigerant pipe
B1
A
A
B
A1 B1
A
B
A
B
B
A
B
Earth wire is
giving slack.
Wiring label
●
The wiring label is attached on the back of the service panel.
Outgoing cable direction
●
As like the refrigerant pipe, it can be let out in any of 4 directions of right-hand side,
front, rear and bottom.
●
Fix power cables separately from signal cables.
Length (m)
Wire size
0.5mm
2
0.75mm
2
1.25mm
2
2.0mm
2
Request
●
When connecting to the power supply terminal block,
use the crimp terminals for M5 as shown at right.
●
When connecting to the signal terminal block, use
the crimp terminals for M3.5 as shown at right.
Remote controller wiring specifications
●
For the remote controller the standard wire is 0.3 mm
2
. The max. length
is up to 600 m. When the wire is more than 100 m long, use the wire
shown in the table.
●
Use 3-core wires for
FD A
KXE4
or 2-core wires for
FD
KXE6
.
12.5 mm or less
7 mm or less
Within 100 - 200
Within - 300
Within - 400
Within - 600
When the FD
KXE6 Series unit(s) only is connected;
Standard resistance value = 5,100/number of connected units
When the FD A
KXE4 Series unit(s) only is connected:
Standard resistance value = 9,200/number of connected units
When the FD A
KXE4 Series and type FD
KXE6 Series units are connected in a mixture:
Standard resistance value = 46,000/{(Number of FD A
KXE4 Series units connected x 5) + (Number of FD
KXE6 Series units connected x 9)}
Number of connected units includes the indoor unit, outdoor unit and SL devices.
