25
(1) An example of a system to which an MA remote controller is connected
Control Wiring Diagram
Notes
Maximum Allowable Length
Wiring and Address Setting
NO
NO
Leave the male connector
on CN41 as it is.
OC
TB3
TB7
M1 M2
M1 M2 S
51
IC
TB5-1
A1 B1 S
01
TB5-2
A2 B2 S
02
A B
TB15
1 2
MA(Main)
A B
MA(Sub)
L1
A1 B2
MA
m1
m2
1. Leave the male connector on the female power supply switch connector (CN41) as it is.
2. Grounding to S terminal on the terminal block for transmission line for centralized
control (TB7) is not required.
3. Although two indoor controllers (controller circuit boards) are equipped inside the
indoor unit, the board on No.2 side (lower side) is not used. Do not connect wiring to
the lower controller circuit board.
4. No more than two MA remote controllers (including both main and sub controllers) can
be connected to a group of indoor units. If three or more MA remote controllers are
connected, remove the wire for the MA remote controller from the terminal block (TB15).
5. The outdoor unit cannot be connected to the units other than the PFD series indoor units.
<a. Indoor/Outdoor transmission line>
Same as (1)
1
.
<b. MA remote controller wiring>
[When two remote controllers are connected to the system]
When two remote controllers are connected to the system, connect terminals 1 and 2 of the terminal block (TB15) on the indoor unit (IC) to the terminal
block on the MA remote controllers (option).
*Set the Main/Sub switch on the connected MA remote controllers (option) to SUB.
(See the installation manual for the MA remote controller for the setting method.)
<c. Switch setting>
Address setting is required as follows.
Main Controller
Sub Controller
Settings to be made with the sub/main switch
IC
IC
OC
1
2
Notes
3
MA
MA
51~100
01~50
01~50
00
00
Setting not required.
Sub Controller
✻
One indoor controller (controller circuit board)
is equipped in the indoor unit (10HP), and two
indoor controllers (controller circuit boards)
are equipped in the indoor unit (20HP).
<a. Indoor/Outdoor transmission line>
Same as (1)
1
.
<b. MA remote controller wiring>
Maximum overall length (0.3-1.25mm
2
or more)
m1 + m2 200m
Steps
Unit or controller
Main
Sub
Indoor
unit
MA
remote
controller
Address
setting range
Address setting method
Outdoor unit
Factory
setting
Main
Assign a sequential odd number starting with
"01" to the upper indoor controller.
Zone number (SW14) setting is
required. (Setting range: between
1 and 5)
Add 50 to the address assigned to the indoor unit
connected to the system with one outdoor unit.
Assign sequential numbers starting with the
address of the main unit in the same group.
(Main unit a1)
3
System in which two MA remote controllers are connected to one indoor unit
