1
System Using MA Remote Controller
(4) When grouping 2 indoor units (20HP systems) with MA remote controller
Remarks
Maximum Allowable Length
Control Wiring Diagram
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.
6. The outdoor unit cannot be connected to indoor units
other than the PFD-type ones.
<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
2
)
m1 + m2 + m3 200m
NO
NO
OC
TB3
TB7
E
A B
A B S
51
IC
MA(Main)
TB5-1
A B S
01
TB5-2
A B S
TB15
1
2
A1 B2
02
OC
TB3
TB7
E
A B
A B S
52
OC
TB3
TB7
E
A B
A B S
53
IC
MA(Sub)
TB5-1
A B S
03
TB5-2
A B S
TB15
1
2
A1 B2
04
OC
TB3
TB7
E
A B
A B S
54
L31
L31
L1
m3
m1
Use CN41 as is.
✻
There are two indoor controller
board inside each indoor unit.
Replace CN41 with CN40.
L1
L2
m2
Use CN41 as is.
L2
Replace CN41 with CN40.
Connect
Connect
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