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(1) System Using MA Remote Controller
3 When connecting 2 MA remote controller to one indoor unit (20HP Systems)
Replace CN41 with CN40
Remarks
1. Use sequential numbers to set indoor unit address.
2. Do not connect TB5s' of the indoor units that are
connected to different outdoor units with each other.
3. Replace CN41 with CN40 on only one outdoor unit.
4. Ground only one of the outdoor units' S terminal of
TB7 (centralized control transmission terminal).
5. No more than two main and sub controllers can be
connected to the indoor unit in the same group.
Disconnect the MA remote control wire from TB15 if
using more than 2 remote controllers.
Control Wiring Diagram
L1
OC
51
TB7
TB3
A B S
A B
E
Connect
m2
m1
Use CN41 as is
A1 B2
MA(Sub)
OC
52
TB3
TB7
A B
E
A B S
NO
L2
IC
01
TB5-1
A B S
TB15
1 2
NO
A1 B2
A1 B2
MA(Main)
MA
NO
02
TB5-2
A B S
Maximum Allowable Length
<a. Indoor/outdoor transmission line >
Same as (2).
<b. Transmission line for centralized control >
Same as (2).
<c. MA remote controller wiring >
Maximum allowable length (0.3 ~ 1.25mm
m1 + m2
200m
24
✻There are 2 indoor controller
boards inside indoor unit.
2
)
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