Mitsubishi Electric PFD-P250VM-E Service Manual page 27

(1) An example of a system to which an MA remote controller is connected
3 System in which two MA remote controllers are connected to one indoor 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, 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.
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
TB7 TB3 TB5-1
M1 M2 S M1 M2
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
25
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).
m2
NO
A B A1 B2
MA(Sub) MA
NO
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 200m
Zone number (SW14) setting is
required. (Setting range: between
1 and 5)
2 or more)
Factory
Notes
setting
00
00
Main