15
ENGLISH
CAUTION
Be sure to put Outdoor Unit to earth. Do not connect earth line to
any gas pipe, water pipe, lightening rod or telephone earth line. If
earth is incomplete, it may cause an electric shock.
!
CAUTION
The cable connected to the unit should be selected according to
the following specifications.
!
2. Install the Outdoor Unit communication 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.)
3. Be sure to provide designated grounding work to Outdoor Unit.
4. 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.
5. Never connect the main power source to terminal block of commu-
nication line. If connected, electrical parts will be burnt out.
6. Use 2-core shield cable for communication line.(O mark in the figure
below) If communication lines of different systems are wired with
the same multiplecore cable, the resultant poor transmitting and re-
ceiving will cause erroneous operations. ( mark in the figure
below)
7. Only the communication line specified should be connected to the
terminal block for Outdoor Unit communication .
WARNING
Be sure to have authorized electric engineers do electric work
using special circuits in accordance with regulations and this instal-
lation manual. If power supply circuit has a lack of capacity or elec-
tric work deficiency, it may cause an electric shock or fire.
!
WARNING
The temperature sensor for outdoor air should not be exposed to
direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
!
2-Core Shield Cable
Multi-Core Cable
CAUTION
• Use the 2-core shield cables for communication lines. Never use
them together with power cables.
• 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 in-
stall a phase leading capacitor.
• Keep power imbalance within 2 % of the supply rating. Large imbal-
ance will shorten the life of the smoothing capacitor.
!
Control box and connecting position of wiring
- Remove all of the screws at front panel and remove the panel by
pulling it forward.
- Connect communication line between main and sub outdoor unit
through the terminal block.
- Connect communication lines between outdoor unit and indoor units
through the terminal block.
- When the central control system is connected to the outdoor unit, a
dedicated PCB must be connected between them.
- When connecting communication line between outdoor unit and in-
door units with shielded wire, connect the shield ground to the earth
screw.
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