Sample System Connection - Mitsubishi Electric PUHY-P250YHM-A Data Book

7-4.Sample System Connection

(1) An example of a system to which an MA remote controller is connected
1 System connected to one outdoor unit
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 (TB5-1) 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 (TB5-1).
<b. Switch setting>
Address setting is required as follows.
Unit or controller
Main
Indoor
1
unit
Sub
2 Outdoor unit
MA
Main Controller
3 remote
controller
Sub Controller
Control Wiring Diagram
L1
OC IC
51
01
TB3
TB7 TB5-1
M1 M2 S M1 M2 A1 B1 S
TB15
1 2
A B
MA
02
TB5-2
A2 B2 S
Notes
Wiring and Address Setting
Address
Address setting method
setting range
Assign a sequential odd number starting with
IC 01~50
"01" to the upper indoor controller.
Assign sequential numbers starting with the
IC 01~50
address of the main unit in the same group.
(Main unit address +1)
Add 50 to the address assigned to the indoor unit
OC 51~100
connected to the system with one outdoor unit.
MA
Setting not required.
Sub Controller
MA Settings to be made with the sub/main switch
24
✻
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).
Maximum Allowable Length
<a. Indoor/Outdoor transmission line>
Maximum Length (1.25mm 2 or more)
L1 200m
Notes
Factory
setting
00
00
Main