Mitsubishi Electric PURY-P200 Service Handbook page 28

1. System using MA remote controller
(3) In the case of different refrigerant grouping operation
CN41→CN40
Replace
Connect
Leave CN41
as it is.
✻1.
BC and BS are found only in the R2 system.
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 of S-terminal of the centralized control terminal
block (TB7) on outdoor unit should be done only on one out-
door unit.
6. When the total number of indoor units exceeds 26 units in-
cluding that above Type 200, a transmission booster is re-
quired.
Control wiring example
L1
OC
✻ 1
BC
51
55
TB7 TB3 TB02
M1M2 S M1M2 M1M2 S
M1M2 S
TB02
53
✻ 1
BS
L21 L22
OC
✻ 1
BC
52
54
TB7 TB3 TB02
M1M2 S M1M2 M1M2 S
NO
L2 L3
Group
Group
IC
01
TB5 TB15
M1M2 S 1 2 M1M2
A1 B2
MA
L23
Group
IC
02
TB5 TB5
TB15
M1M2 S 1 2 M1M2
a. Indoor/outdoor transmission line
Farthest length (1.25mm
L1 + L2 + L3 + L4
L21 + L22 + L23 + L24
b. Centralized control transmission line
Farthest length via outdoor unit (1.25mm
L1 + L2 + L3 + L4 + L31 + L21 + L22 + L23 + L24
c. MA remote controller wiring
The same as 1. (1)
- 25 -
Interlocking with ventilation
L4
LC
IC
03 06
TB5 TB15 TB5
S M1M2 S
1 2
A1 B2
MA
NO
L24
IC IC
04 05
TB15 TB5 TB15
S 1 2 M1M2 S 1 2
A1 B2
MA
– Example to use shielded wire –
Allowable length
2
or more)
≤
200m
≤
200m
2 or more)
≤
500m