When using residual current operated circuit breakers, be
sure to use a high-speed type 200mA rated residual oper-
Select the power supply cable in accordance with relevant
local and national regulations.
Wire size must comply with the applicable local and
Specifications for local wiring power cord and branch wiring
must be compliance with local code.
Make sure to connect the power supply wire to the power
supply terminal block and to clamp it as shown in, under
Field Line Connection.
As this unit is equipped with an inverter, installing a phase-
advancing capacitor not only reduces the power improve-
ment factor, but may also cause the capacitor to overheat
due to high-frequency waves. Never install a phase-
Keep power imbalance within 2% of the supply rating.
1. High imbalances will shorten the life of the smoothing
2. As a protective measure, the product stops operating
and an error indication is made when a power imbal-
ance exceeds 4% of the supply rating.
Follow the Electrical Wiring Diagram. when carrying out
any electrical wiring.
Only proceed with wiring work after blocking off all power.
Always ground wires in accordance with national regula-
tions of the pertinent country.
This unit uses an inverter that generates noise which must
be reduced to prevent interference with other devices. The
outer casing of the product may take on an electrical
charge due to leaked electrical current, which must be dis-
charged with the grounding.
Be sure to install a ground leak detector capapable of han-
dling higher harmonics in order to prevent malfuncitoning of
the ground leak detector.
Use a ground leak detector especially for protecting
ground-faults in conjunction with main switch or fuse for
use with wiring.
This unit has a negative phase protection circuit that should
only be operated after correcting the wiring.
Do not ground units to water pipes, telephone wires,
or lightning rods because lighting strikes incomplete
grounding can cause a severe shock hazard result-
ing in severe injury or death.
• Do not ground units to gas pipes because a gas leak can
result in an explosion which can lead to severe injury or
System example (Refer to figure 13, page 38).
Field power supply
Earth leak detector
COOL / HEAT selector
power supply wiring (sheathed cable)
transmission wiring (sheathed cable)
Field line connection
L1, L2, L3, phase of the power supply wiring should be
clamped to the safety catch using the included clamp material.
The green and yellow striped wrapped wires should be used
(Refer to figure 14, page 38.)
(208~230 V, Three-phase)
Branch switch, overcurrent breaker
Earth leakage breaker
Attach insulation sleeves.
Power supply terminal block
Retain the ground wire along with the power supply
wiring using the accessory clamps (1).
Retain the power supply wiring to the bracket using the
accessory clamps (1).
When wiring, do not allow the ground wire to contact
the compressor lead wires. If the wire contacts each
other, adverse effects may occur to other units.
When connecting two wires to one terminal, ensure
that the crimp-style terminals face back to back and
that the wire of the smaller gauge is located above.
Wire gauge: Small
Wire gauge: Large
(Refer to figure 20, page 39.)
Retain with accessory clamp (3).
Wiring between units
Retain to the electric parts box with the accessory
When routing the remote controller cord and inter-unit
wiring, secure clearance of 5" or more from the power
wiring. Ensure that the power wiring does not contact
any heated sections
Retain to the back of the column support with the
accessory clamp (2).
When wiring, exercise sufficient caution not to detach
the acoustic insulators from the compressor.
Installation of Outdoor Units