Toshiba MMC-AP0157HP-E (TR), Installation Manual

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Indoor unit

Remote 

controller

Indoor unit

Indoor unit

Indoor unit

10

50

10

R

(L)

S

(N)

30

Electrical control 
box cover

P.C. board 

Terminal block 

Power supply wire 

Power supply wire

Run the power supply 
wire here through the 
clamp base and 

fi

 x it 

with a cord clamp.

▼

Connecting power supply wire and the system interconnection wire

Power supply 
terminal block

Interconnection wire / Remote 
controller terminal block

System interconnection 
wires

Run the system 
interconnection wire here 
through the clamp base and 

fi

 x it with a cord clamp.

◆

Wire connection

REQUIREMENT

•  Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
•  Pass the wires through the bushing of wire connection holes of the indoor unit.
•  Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing.
•  The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit) 

1

Loosen the cover mounting screws (2 positions) of the electrical control box, and then remove the 
cover. 

2

Connect the indoor power supply wire, system interconnection wires and the remote controller wire to 
the terminal block of the electrical control box.

3

Tighten screws of the terminal block securely, and 

fi

 x the wires with code clamp attached to the 

electrical control box. (Do not apply tension to the connecting section of the terminal block.)

4

Mount the cover of the electrical control box so that it does not pinch the wires.

25-EN 

26-EN 

▼

Power supply

Power supply

220-240 V ~, 50 Hz

220 V ~, 60 Hz

Power supply switch / circuit breaker or power supply wiring / fuse rating for indoor units should be selected by 
the accumulated total current values of the indoor units.

Power supply wiring

Below 50 m

2.5 mm

2

Control wiring, Central controller wiring

•  2-core with polarity wires are used for the Control wiring between indoor unit and outdoor unit and Central 

controller wiring.

•  To prevent noise trouble, use 2-core shield wire.
•  The length of the communication line means the total length of the inter-unit wire length between indoor and 

outdoor units added with the central control system wire length.

▼

Communication line

Control wiring between indoor units, and 
outdoor unit (2-core shield wire)

Wire size

(Up to 1000 m) 1.25 mm²

(Up to 2000 m) 2.0 mm²

Central control line wiring (2-core shield 
wire)

Wire size

(Up to 1000 m) 1.25 mm²

(Up to 2000 m) 2.0 mm²

Remote controller wiring

•  2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.

Remote controller wiring, remote controller inter-unit 
wiring

Wire size: 0.5 mm² to 2.0 mm²

Total wire length of remote controller wiring and remote 
controller inter-unit wiring = L + L1 + L2 + … Ln

In case of wired type only

Up to 500 m

In case of wireless type 

included

Up to 400 m

Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln

Up to 200 m

 CAUTION

The remote controller wire (Communication line) and AC 220-240 V wires cannot be parallel to contact 
each other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control 
system due to noise or other factor.

Remote 
controller 
wiring

Remote controller inter-unit wiring

Ln

(Max. 8 units)

L2

L1

L

Two screws

Earth wire

2 mm or 

less

Power supply wire

See the 

fi

 gure on the left 

for connecting wires to the 
terminal block.

Power supply wire