ENGLISH
11. Electrical work
11.1. Caution
1Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.
Warning:
Be sure to have authorized electric engineers do 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, if may cause an electric shock or fire.
2Install the outdoor unit transmission line 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.)
3Be sure to provide designated grounding work to outdoor unit.
Caution:
Be sure to put outdoor unit to earth. Do not connect earth line to any gas pipe, water pipe, lightning rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
4Give 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.
5Never connect the main power source to terminal block of transmission line. If connected, electrical parts will be burnt out.
6Use 
mark in the figure below) If transmission lines 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)
7Only the transmission line specified should be connected to the terminal block for outdoor unit transmission.
(Transmission line to be connected with indoor unit : Terminal block TB3 for transmission line, Other : Terminal block TB7 for centralized control) Erroneous connection does not allow the system to operate.
8In case to connect with the upper class controller or to conduct group operation in different refrigerant systems, the control line for transmission is required between the outdoor units each other.
Connect this control line between the terminal blocks for centralized control.
When conducting group operation in different refrigerant systems without connecting to the upper class controller, replace the insertion of the short circuit connector from CN41 of one outdoor unit to CN40.
9Group is set by operating the remote controller.
0Caution! If the electrical wiring connections (L1, L2, L3, N 
) are made incorrectly, damage to the unit could result.
| A |
| C |
TB3 |
|
TB7 | B |
| |
| D |
TB3 |
|
TB7 | B |
|
TB3: Transmission line terminal board, TB7: Central control line terminal board
AOutdoor unit
B
CIndoor unit
DRemote controller
E
| A |
| C |
TB3 |
|
TB7 | E |
| |
| D |
TB3 |
|
TB7 |
|
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