Sample System Connection - Mitsubishi Electric PFD-P250VM-E Service Manual

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
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.
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.
OC
51
TB3
TB7
M1 M2 S M1 M2
Notes
Wiring and Address Setting
Address
setting range
IC 01~50
IC 01~50
OC 51~100
MA
Setting not required.
Sub Controller
MA
IC
01
TB5-1
A1 B1 S
TB15
1 2
NO
A B
MA
02
TB5-2
A2 B2 S
<a. Indoor/Outdoor transmission line>
Maximum Length (1.25mm
L1
Address setting method
Assign a sequential odd number starting with
"01" to the upper indoor controller.
Assign sequential numbers starting with the
address of the main unit in the same group.
(Main unit address +1)
Add 50 to the address assigned to the indoor unit
connected to the system with one outdoor unit.
Settings to be made with the sub/main switch
23
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
or more)
2
200m
Notes
Zone number (SW14) setting is
required. (Setting range: between
1 and 5)
Factory
setting
00
00
Main