Toshiba MMD-AP0071SH-C Service Manual page 27

8
ELECTRIC WORK
Cable connection
REQUIREMENT
• Be sure to pass the wire through the wire connection port of the indoor unit.
• Keep a margin (Approx. 100mm) on a wire to hang down the electric parts box at servicing, etc.
• The low-voltage circuit is provided for the remote controller.
• Before remove the electric parts cover, remove the cover plate and air filter.
• Remove the cover of the electric parts box by taking off the mounting screws (2 positions) and pushing the
hooking section. (The cover of the electric parts box remains hanged to the hinge.)
• Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electric parts box.
(Do not apply tension to the connecting section of the terminal block.)
• Be sure to set a loop for the connecting wire of the storing part of the indoor unit electric parts; otherwise the
electric parts box cannot be drawn out in service time.
• Mount the cover of the electric parts box without pinching wires.
Control wire
Power supply cord
Remote controller wire
Cable cramp
R
(L)
Electric
parts box
Electric parts
box cover
Screw
(2 positions)
Cover plate
S
(N)
Earth line
Power supply cord
Remote controller wiring
• As the remote controller wire has no polarity, there is no problem if connections to indoor unit terminal blocks A
and B are reversed.
<Wiring diagram>
Terminal block for
remote controller
wiring of indoor unit
Wiring between indoor and outdoor units
<Wiring example>
Outdoor Power supply
380V-415V ~ 50Hz
380V ~ 60Hz
Earth leakage
breaker
Header outdoor unit
Earth
L1 L2 L3 N U1 U2 U3 U4
terminal
Control wiring between indoor and outdoor units
Indoor unit
Earth
L N U1 U2 A B
Air filter
A B
Indoor power supply
220-240V, ~50Hz
Remote controller
220V~60Hz
Earth leakage breaker
Pull box
power switch
Address setup
Set up the addresses according to the Installation Manual attached to the outdoor unit.
Terminal block
A
A Remote
B controller unit
B
Remote controller wire
(Field supply)
An outdoor unit connected with
control wiring between indoor and
Outdoor Power supply
outdoor units wire becomes
380V-415V ~ 50Hz
automatically the header unit.
380V ~ 60Hz
Earth leakage
breaker
Header outdoor unit
Earth
U5 U6 terminal L1 L2 L3 N U1 U2 U3 U4 U5 U6
Control wiring between outdoor units
Control wiring between indoor units
Indoor unit Indoor unit
Earth Earth
L N U1 U2 A B L N U1 U2 A B
A B A B
Remote controller Remote controller
Pull box Pull box
NOTE
Indoor unit
Earth
L N U1 U2 A B