Mitsubishi Electric PUHY-P200 Service Handbook page 33

2. System Using the M-NET Remote Controller
(1) System with the system controller connected to the transmission lines for centralized control
CN41→CN40 Replace
SW2-1 OFF→ON
Leave CN41 as it is.
SW2-1 OFF→ON
Note 1: If only the LM adaptor is connected, leave SW2-1 to OFF.
Note 2: LM adaptor requires single phase AC 230 V.
Prohibited items
1. A group of indoor units cannot be connected to both M-NET
remote controller and MA remote controllers.
2. No more than 2 M-NET remote controllers can be connected
to a group of indoor units.
'
3. Do not connect the TB5 s (Terminal block) of the indoor
units that are connected to different outdoor units.
4. Replace CN41 (power supply switch connector on outdoor
units) on only one of the outdoor units.
5. Ground the S terminal of TB7 on only one of the outdoor
units.
6. Transmission line booster is necessary when the total
number of connected indoor units exceeds 20 (19 with 1 BC
and 18 with 1 BC and BS each).
7. Transmission line booster is necessary if the system
includes indoor units of 200 or higher and the total number
of indoor units exceeds 16 (15 with 1 BC and 14 with 1 BC
and BS each).
Control wiring example
L2
Note 1
Group
OC
IC
51
01
TB3
TB7 TB5 TB15
M1M2 S M1M2 M1M2 S
Connect
A1 B2
101
RC
L22
Note 1
OC
IC
53
03
TB3 TB5
TB7
M1M2 S M1M2 M1M2 S
NO
Note 2
A1 B2
System controller
103
A B S
RC
Interlocking with ventilation
L3 L4
Group
IC
02
TB5 TB15
M1M2 S
1 2 1 2
A1 B2
102
RC
L23 L24
Group
IC
04
TB5 TB15
TB15
M1M2 S
1 2 1 2
Allowable length
a. Indoor/outdoor transmission line
The same as 1. (3)
b. Centralized control transmission line
The same as 1. (4)
c. M-NET remote controller wiring
The same as 2. (1)
- 31 -
LC
05
TB5
M1M2 S
NO
LC
06
TB5
M1M2 S
– Example to use shielded wire –