Hitachi CH-AP04MSSX, Installation Manual

For Mexico

model only.

Outdoor

1 2

TB2

TB2

TB2

TB2

TB2

TB2

TB2

TB1

1

A 2

B

Indoor Unit A

Power Supply Wiring

Outdoor Unit

Power Supply

1~/N 230V/50Hz

1~/N 220-240V/50Hz

1~/N 220V/60Hz

1

A 2

B

Indoor Unit B

1

A 2

B

Indoor Unit L

1

1

A 2

B

Indoor Unit L

2

When multiple indoor units are connected to the same branch of CH-Box,

the operation mode (cooling/heating) for the indoor units will be the same.

1

A 2

B

Cooling Only Indoor Unit

CH-Box

Connect communication

cable from cooling only

indoor unit to the outdoor

terminal block (TB2) in

CH-Box.

Communication Cable

Outdoor Unit

3

2

O.U.-O.U.

4

1

H-LINK

CH-AP04MSSX

TB3

TB4

PCB1

Indoor

4

6

5

3

7 8 9 10

A

B

C

D

Indoor

TB3

TB4

PCB2

Indoor

4

6

5

3

7 8 9 10

E

F

G

H

Indoor

TB3

TB4

PCB3

Indoor

4

6

5

3

7 8 9 10

I

J

K

L

Indoor

Outdoor

1 2

TB2

TB3

TB4

PCB1

Indoor

4

6

5

3

7 8

A

B

C

Indoor

CH-Box

A to L indicate the Indoor Unit number.

WC

WC

WC

WC

WC

CH-AP08MSSX

CH-AP12MSSX

WC: Wired Controller

(Non-Polarity)

(DC5V)

Communication Cable

(Non-Polarity)

(DC5V)

Connect 

communication cable

from outdoor unit

to the outdoor

terminal block (TB2)

in CH-Box.

ELB

S

Earth

Leakage

Breaker

Main Switch

and Fuse

Power

Supply

R/

 L1

S/

 L2

TB3

TB4

PCB4

Indoor

4

6

5

3

7 8 9 10

M

N

O

P

Indoor

CH-AP16MSSX

5

3

3

2

1

4

1~,    208-230V/50Hz

1~,    220V/60Hz

22 

P5417025-rev.1

 •  Example of Electrical Wiring

  The following figure shows an example of electrical wiring around the CH-Boxes.

NOTES:

1.  Do not apply excessive voltage to the communication cable DC5V (non-polarity) between the outdoor 

unit and the CH-Box, between the CH-Box and the indoor unit or between CH-Boxes.  

2.  Use 2-Conductor shielded communication cable for the communication cable.  (Do not use 3-Conductor 

cable or over.)

3.  Connect the communication cable for the outdoor unit to terminals “1” and “2” on TB2 in the CH-Box.
4.  Connect the communication cable for the indoor unit exclusively for cooling operation to the terminal “1” 

and “2” on TB2 in the CH-Box.

5.  For a CH-Box in the same refrigerant cycle, an electrical power supply can be supplied by one main 

switch.

6.  Do not connect the power supply line (220-240V/220V/230V) to the terminal block for transmission line. 
7.  Connect the ground wiring for the outdoor/indoor units and CH-Box.  When ground resistance is less 

than 100 ohms, ground wiring work should be performed by the qualified electrician.

8.  Do not run the communication cables along with power supply wirings in the CH-Box. 

Separate communication cables from the power supply wirings.