Daikin FT25JV1B Installation Manual download pdf (Page 8)

4. Connection method to product

Basically, Transmission Monitor should be connected to the communication wires (3 wires) of indoor and

outdoor units. As for some RA products produced in and after 2001, assignment of transmission wire has

been changed from No. 2 to No.3 of the terminal block. Therefore, the connection method should be

selected from the following two methods according to the models applied.

It is recommended to measure the voltage to determine the connection method. Take Connection method 1

when the power supply voltage is impressed between connection wire 1-3, and Connection method 2 when

the power supply voltage is impressed between connection wires 1-2. However, since connection method

cannot be determined with voltage measurement when any malfunction in communication wiring or in

transmission is occurred, it is required to confirm with wiring diagrams or those in service manual.

1. Connection method 1 (Power Supply1 to 3)

When power supply 1 to 3.

Connection

wire/ No. of

product

Transmission

monitor wiring

Meaning of

wiring

1 A(Red)

Power supply

2 B(White)

Signal

(

between

connection

wire 2 to 3

)

3 C(Black)

Power supply

2. Connection method 2 (Power Supply1 to 2)

When power supply 1 to 2.

Connection

wire/ No. of

product

Transmission

monitor wiring

Meaning of

wiring

1 A(Red)

Power supply

2 C(Black)

Power supply

3 B(White)

Signal

(

between

connection

wire 2 to 3

)

Caution: Incorrect connection (incorrect wiring) may not damage the Transmission Monitor or the product

itself but may cause transmission error. The short-circuited clip of Transmission Monitor could result

in damage of the components of product. Therefore, care should be taken for the positive connection.

Indoor Unit

Outdoor Unit

Transmission

Monitor

Connection method 1(Power Supply 1 to 3)

1 2 3

Indoor Unit

Outdoor Unit

Transmission

Monitor

Connection method 2 (Power Supply 1 to 2)

1 2 3

Be careful for

short circuiting

caused b

the

Example of connection to out door unit

Example of connection to indoor unit

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 30 31

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Daikin FT25JV1B Installation Manual Page 8

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