Mitsubishi Electric PFD-P250VM-E Service Manual page 26

(1) An example of a system to which an MA remote controller is connected
2 System connected to two outdoor units
Disconnect the male power supply
connector from CN40 and connect
it to CN41.
1. Assign a sequential number to the outdoor unit.
2. Do not connect the terminal blocks (TB5) of the indoor units connected to different
outdoor units.
3. Disconnect the male connector on the controller board from the female power supply
switch connector (CN41), and connect it to the female power supply switch connector
(CN40) on only one of the outdoor units.
4. Provide grounding to S terminal on the terminal block for transmission line for
centralized control (TB7) on only one of the outdoor units.
5. When the power supply unit is connected to the transmission line for centralized
control, leave the male connector on the female power supply switch connector
(CN41) as it is at factory shipment.
6. 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]
<b. Transmission line for centralized control> Only with connection to a manipulator for centralized control
Daisy-chain terminals M1 and M2 on the terminal block for transmission line for centralized control (TB7) on each outdoor unit (OC).
Disconnect the male connector on the controller board from the female power supply switch connector (CN41), and connect it to the female power
supply switch connector (CN40) on only one of the outdoor units. *Only use shielded cables.
[Shielded cable connection]
<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
TB3
TB7 TB5-1
M1M2 S M1 M2
A1 B1 S
TB15
Connection
1 2
A B
Leave the male connector
MA
on CN41 as it is.
OC
52
02
TB5-2
TB7 TB3
A2B2 S
M1 M2 S M1 M2
NO
L2
Notes
Wiring and Address Setting
Connect the earth terminal of the OC and S terminal of the IC terminal block (TB5).
To ground the shielded cable, daisy-chain the S-terminals on the terminal block (TB7) on each of the outdoor
units. Connect the S (shielded) terminal on the terminal block (TB7) on the outdoor unit whose male connector
on CN41 was disconnected and connected to CN40 to the earth terminal (
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).
NO
Maximum Allowable Length
<a. Indoor/Outdoor transmission line>
Maximum Length (1.25mm
L1, L2 200m
<b. Transmission line for centralized control>
Maximum Length via outdoor unit (1.25mm
L1 + L31 + L2
Zone number (SW14) setting is
required. (Setting range: between
1 and 5)
2 or more)
2 or more)
500m
) on the electric box.
Factory
Notes
setting
00
00
Main