Mitsubishi Electric City Multi PFAV-P500VMH-E, Service Handbook

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[
II
Restrictions ]
GB HWE07150
(3) Sample control wiring (When PFAV-P500VMH-E and PUHY-P500YSHM-A system (connect the system controller to
the transmission cable for the centralized control))
(1) Cautions
1) Three or more MA remote controllers cannot be connect-
ed to indoor units in the same group.
2) Do not connect together the terminal blocks (TB5) of in-
door units connected to different outdoor units.
3) Replace the CN41 power connector with the CN40 pow-
er connector for just one unit in the system.
4) Connect the shielded earth (S terminal) of the transmis-
sion terminal block (TB7) for the central controller to the
earth of the outdoor unit for which the power supply con-
nector was replaced.
(2) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [4] (2).
2) Transmission line for centralized control
Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or larger)
L1+L2+L31+L3+L4 500m [1640ft]
L32+L3 500m [1640ft]
L32+L4+L31+L1+L2 500m [1640ft]
3) MA remote controller wiring
Same as [4] (1).
(3) Wiring method
1) Indoor/outdoor transmission cable
Same as [4] (2).
[Shielded cable connection]
Same as [4] (1).
2) Transmission cable for centralized control
Connect terminals M1 and M2 of the transmission termi-
nal block (TB7) for the central controller of each OC, OS
and terminals A and B of the system controller in a daisy-
chain. (Non-polarized two-wire)
For just one OC, replace the CN41 power connector on
the control board with the CN40 power connector. Set
the centralized control switch (SW2-1) on the control
boards of all OCs and OSs to ON.
* Only use shielded cables.
[Shielded cable connection]
Use the earth of the shielded cable to connect the S ter-
minal of the terminal block (TB7) of each OC and the S
terminal of the system controller in a daisy-chain.
Short the S terminal and earth terminal ( ) of the termi-
nal block (TB7) of the one OC for which CN40 was re-
placed.
3) MA remote controller wiring
Same as [4] (1).
[In the case of operation with two remote controllers]
Same as [4] (1).
[In the case of indoor group operation]
Same as [4] (1).
4) Switch Setting
Refer to Chapter 3-[2]-(1) "Address Setting". (page 19)
IC
TB5
A B S
TB 15
1 2
01
A1 B2
MA (body)
IC
TB5
1 2
TB 15
03
A1 B2
MA (body)
Group
Group
Note 1. When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
L1
L3 L4
OC
TB3
TB7
M1M2
51
OC
TB3 TB7
A B S M1M2 S
53
L31
System control
A B S
L32
Note1
CN41 as it is
SW2-1 OFF ON CN41 as it is
SW2-1 OFF ON
L2
Connection
Not
connect
* Supply power from the outdoor unit
to the central controller
CN41 as it is
SW2-1 OFF ON
CN41 CN40 Replace
SW2-1 OFF ON CN41 as it is
SW2-1 OFF ON
M1M2
OS
TB3 TB7
M1M2 S
54
M1M2
M1M2 S
OS
TB3
TB7
M1M2
52
M1M2 S