Mitsubishi Electric PUHY-P250YHM-A Data Book page 31

(1) An example of a system to which an MA remote controller is connected
4 System in which two indoor units are grouped with the MA remote controller
Leave the male connector
on CN41 as it is.
OC
51
TB3
TB7
M1M2 S M1M2
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>
[Group operation of indoor units]
To perform a group operation of indoor units (IC), daisy-chain terminals 1 and 2 on the terminal block (TB15) on all indoor units (IC). (Non-polarized 2-
core cable)
*Set the Main/Sub switch on one of the MA remote controllers to SUB.
<c. 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
Leave the male connector
on CN41 as it is.
IC
01
TB5-1
A1 B1 S
TB15
1 2
m1
A B
MA(Main)
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
27
L1
OC IC
53
03
TB3
TB7 TB5-1
M1 M2 S M1M2 A1 B1 S
TB15
1 2
m2
A B
MA(Sub)
04
TB5-2
A2 B2 S
m3
Maximum Allowable Length
<a. Indoor/Outdoor transmission line>
Same as (1) 1.
<b. MA remote controller wiring>
Maximum overall length (0.3-1.25mm
m1 + m2 + m3
✻
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).
2 or more)
200m
Factory
Notes
setting
00
00
Main