Mitsubishi Electric PURY-P200 Service Handbook page 34

1. System using MA remote controller
(6) In the case of connecting system controller to indoor/outdoor transmission line (excluding LM adaptor)
CN41→CN40 Replace
SW2-1 OFF→ON
Connect
Leave CN41 as it is.
SW2-1 OFF→ON
✻1.
BC and BS are found only in the R2 system.
Note 1. LM adaptor may not be connected to indoor/outdoor transmission line.
Prohibited items
1. M-NET and MA remote controllers can not be connected to-
gether to the indoor unit within the same group.
2. MA remote controller of 3 units or more can not be connected
to the indoor unit within the same group.
3. Do not connect together the terminal blocks (TB5) of the in-
door unit connected to different outdoor units.
4. Replacement of the power supply selecting connector (CN41)
on the outdoor unit should be done only on one outdoor unit.
5. Grounding work is required for S-terminal of the centralized
control transmission block (TB7) on one outdoor unit only.
6. The system controller connectable to the indoor/outdoor trans-
mission line counts for 3 sets maximum. While G-50 counts
for only 1 set
7. When the total number of indoor units exceeds 26 sets, the
system controller may not be connected to the indoor/out-
door transmission line.
8. When the total number indoor units exceed 18 sets and they
includes Type 200 or above, the system controller may not
be connected to the indoor/outdoor transmission line.
Control wiring example
L1 L2
Group
OC
✻ 1
BC
51
55
TB3
TB7 TB02
M1M2 S M1M2 M1M2 S M1M2
M1M2 S
TB02
52
✻ 1
BS
L21 L22
Group
OC
✻ 1
BC
53
54
TB02
TB7 TB3
M1M2 S M1M2 M1M2 S M1M2
NO
Note 1
System controller
M1M2 S
Interlocking with ventilation
L3
Group
IC IC
01 02
TB5 TB15 TB5 TB15
S 1 2 M1M2 S 1 2
A1 B2 A1 B2
MA
L23
IC IC
03 04
TB5 TB5 TB15
TB15
S 1 2 M1M2 S 1 2
A1 B2
MA
Allowable length
a. Indoor/outdoor transmission line
Farthest length (1.25mm
L1 + L2 + L3 + L4
L21 + L22 + L23 + L24
L25
b. Centralized control transmission line
Farthest length via outdoor unit (1.25mm
L25 + L31 + L1 + L2 + L3 + L4
L1 + L2 + L3 + L4 + L31 + L21 + L22 + L23 + L24
c. MA remote controller wiring
The same as 1. (1)
- 31 -
L4
LC
05
TB5
M1M2 S
MA
NO
L24
LC
06
TB5
M1M2 S
– Example to use shielded wire –
2 or more)
≤
200m
≤
200m
≤
200m
2
or more)
≤
≤
500m
500m