7-4.Sample System Connection
23
(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
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
NO
L1
Leave the male connector
on CN41 as it is.
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 (20HP), the board on No.2 side (lower side) is not used. Do not connect
wiring to the lower controller circuit board.
4. The outdoor unit cannot be connected to the units other than the PFD series indoor
units.
<a. Indoor/Outdoor transmission line>
Connect M1, M2 terminals of the indoor/outdoor transmission line terminal block (TB3) on the outdoor unit (OC) and A1, B1 terminals of the
indoor/outdoor terminal block (TB5) on the indoor unit (IC). (Non-polarized 2-core cable) *Only use shielded cables.
[Shielded cable connection]
Connect the earth terminal of the OC and S terminal of the IC terminal block (TB5).
<b. 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>
Maximum Length (1.25mm
2
or more)
L1 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)
1
System connected to one outdoor unit