Mitsubishi Electric PUHY-P200 Service Handbook page 27

1. System using MA remote controller
(3) In the case of different refrigerant grouping operation
Leave CN41
as it is.
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
L2
CN41→CN40
Replace
Group
OC
51
TB7 TB3 TB5
M1M2 S M1M2 M1M2
Connect
L22
OC
52
TB3 TB5
TB7
M1M2 S M1M2 M1M2
NO
L3
Group
IC IC
01 03
TB15 TB5 TB15
S M1M2 S
1 2 1 2
A1 B2 A1 B2
MA MA
L23
Group
IC IC
02 04
TB5 TB15
TB15
S M1M2 S
1 2 1 2
A1 B2
MA
a. Indoor/outdoor transmission line
Farthest length (1.25mm
≤
L2 + L3 + L4
≤
L22 + L23 + L24
b. Centralized control transmission line
Farthest length via outdoor unit (1.25mm
L2 + L3 + L4 + L31 + L22 + L23 + L24
c. MA remote controller wiring
The same as 1. (1)
- 25 -
Interlocking with ventilation
L4
LC
06
TB5
M1M2 S
NO
L24
IC
05
TB5 TB15
M1M2 S
1 2
– Example to use shielded wire –
Allowable length
2
or more)
200m
200m
2 or more)
≤
500m