Mitsubishi Electric MXZ-SM72TAM-U1 Service Manual page 169

6. Electrical work
I Constraint items
OC
(00) M-IC
(00)
TB5 TB15
TB3 TB7
1 2
M1 M2 S
M1 M2 S M1 M2 S
A B A B
*1
MA-RC MA-RC
(Main) (Main)
*1. 3 MA remote controllers or more cannot be connected with the CITY MULTI series indoor unit of the same group.
Example for the group operation
I Example of wiring transmission cables
L
1
OC
(00) M-IC
(00)
TB3 TB7
TB5 TB15
M1 M2 S 1 2
M1 M2 S M1 M2 S
A B
MA-RC
Multiple indoor units operated together by 1 MA remote controller.
Note:
Combinations of standard operation, operation using 2 M-NET remote controllers, and group operation are possible.
I Wiring Method and Address Settings
1. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (M-IC).
2. Use feed wiring to connect terminals M1 and M2 on transmission cable terminal block (TB3) for the outdoor unit (OC) to terminals M1 and M2 on the transmission cable
terminal block (TB5) of each CITY MULTI series indoor unit (M-IC). Use nonpolarized 2-core wire.
3. Connect terminals 1 and 2 on transmission cable terminal block (TB15) for each CITY MULTI series indoor unit with the terminal block for the MA remote controller (MA-
RC).
4. In the case of group operation using MA remote controller (MA-RC), connect terminals 1 and 2 on transmission cable terminal block (TB15) of each CITY MULTI series
indoor unit. Use non-polarized 2-core wire.
5. In the case of same group operation, need to set the address that is only main CITY MULTI series indoor unit. Please set the smallest address within number 01–50 of
the CITY MULTI series indoor unit with the most functions in the same group.
I Permissible Lengths
1. Maximum transmission cable length between indoor and outdoor unit:
L1 + L2 ≤ 200 m [656 ft] (1.25 mm² [AWG16] or more)
2. MA remote controller cable length:
6 + 7 ≤ 200 m [656 ft] (0.3 to 1.25 mm² [AWG22 to AWG16])
I Constraint items
OC
(00) M-IC
(00)
TB3 TB7 TB5 TB15
M1M2 S M1M2 S M1M2 S 1 2
A B
MA-RC
*1. The second MA remote controller is connected with the terminal block (TB15) for the MA remote controller of the same CITY MULTI series indoor unit (M-IC) as the first
MA remote control.
M-IC
( ) : Address
(00)
TB5 TB15
M1 M2 S 1 2
A B A B A B
MA-RC MA-RC MA-RC
(Sub) (Main) (Sub)
L
2
M-IC
( ) : Address
(00)
TB5 TB15
M1 M2 S 1 2
r
7
M-IC
( ) : Address
(00)
*1
TB5 TB15
M1M2 S 1 2
A B
MA-RC
en
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