33
ENGLISH
Master Slave1 Slave2
Master Slave1 Slave2
Remote
control
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Indoor
Unit
CAUTION
When the 400 volt power supply is applied to “N” phase by mistake,
check damaged parts in control box and replace them.
Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal
block.
Round pressure terminal
Power cable
When none are available, follow the instructions below.
- Do not connect wiring of different thicknesses to the power terminal
block. (Slack in the power wiring may cause abnormal heat.)
- When connecting cable which is the same thickness, do as shown in
the figure below.
- For wiring, use the designated power cable and connect firmly, then
secure to prevent outside pressure being exerted on the terminal
block.
- Use an appropriate screwdriver for tightening the terinal screws. A
screwdriver with a small head will strip the head and make proper
tighterning impossible.
- Over-tightening the terminal screws may break them.
!
CAUTION
• Use the 2-core shielded wires for communication cables. Never use
them together with power cables.
• The conductive shielding layer of cable should be grounded to the
metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading
capacitor not only will deteriorate power factor improvement effect,
but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2 %.
If it is greater the units lifespan will be reduced.
!
Caution
- Follow ordinance of your governmental organization for technical
standard related to electrical equipment, wiring regulations and
guidance of each electric power company.
- Install the Outdoor Unit communication cable away from the power
source wiring so that it is not affected by electric noise from the power
source. (Do not run it through the same conduit.)
- Be sure to provide designated grounding work to Outdoor Unit.
- Give some allowance to wiring for electrical part box of Indoor and
Outdoor Units, because the box is sometimes removed at the time of
service work.
- Never connect the main power source to terminal block of
communication cable. If connected, electrical parts will be burnt out.
- Use the 2-core shielded wires for communication cable.( mark in
the figure below) If communication cable of different systems are
wired with the same multiplecore cable, the resultant poor
transmitting and receiving will cause erroneous operations. ( mark
in the figure below)
- Only the communication cable specified should be connected to the
terminal block for Outdoor Unit communication.
CAUTION
Be sure to correct the outdoor unit to earth. Do not connect ground
wire to any gas pipe, liquid pipe, lightening rod or telephone earth
line. If earth is incomplete, it may cause an electric shock.
!
WARNING
Be sure to have authorized electrical engineers do the electric
work using special circuits in accordance with regulations and this
installation manual.
If power supply circuit has a lack of capacity or electric work
deficiency, it may cause an electric shock or fire.
!
ELECTRICAL WIRING
2-core shielded cables
Remote
control
Remote
control
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
1Unit
Master
2Unit
Slave1
3Unit
Slave2
4Unit
Slave3
Master
Slave1
Slave2 Slave3
Indoor
Unit
Indoor
Unit
Summary of Contents for Multi V 5 ARUM080LTE5
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