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EN 3
Digital Inverter
2 SAFETY PRECAUTIONS
• Ensure that all Local, National and International regulations are satisfied.
• Read these “SAFETY PRECAUTIONS” carefully before installation.
• The precautions described below include important items regarding safety.
Observe them without fail.
• After the installation work, perform a trial operation to check for any problem.
Follow the Owner’s Manual to explain to the customer how to use and maintain the unit.
• Ask the customer to keep the Installation Manual together with the Owner’s Manual.
WARNING
• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.
Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire.
• Be sure to connect earth wire (grounding work).
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.
• Turn off the main power supply switch or breaker before attempting any electrical work and maintenance.
Make sure all power switches are off. Failure to do so may cause electric shock.
Use an exclusive power circuit for the air conditioner. Use the rated voltage.
• Connect the connecting wire correctly.
If the connecting wire is incorrect, electric parts may be damaged.
• When moving the air conditioner for installation to another place, be very careful not to allow the specified
refrigerant (R410A) to become mixed with any other gaseous body into the refrigeration cycle.
If air or any other gas mixes with the refrigerant, the gas pressure in the refrigeration cycle will become abnormally high and
it may result in the pipe bursting or personal injuries.
• Do not modify this unit by removing any of the safety guards or by by-passing any of the safety interlock switches.
• Do not touch the intake or aluminum fins of the outdoor unit.
Doing so may result in injury.
• Tighten the flare nut with a torque wrench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in refrigerant
leakage.
• Install the air conditioner securely in a location where the base can sustain the weight of the unit adequately.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the unit falling.
• If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may be generated.
• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas may be generated.
• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make sure
the air conditioner uses an exclusive power supply.
An insufficient power supply capacity or inappropriate installation may cause fire.
• Use only the specified wiring during the unit installation. Ensure that all terminals are securely fixed, so preventing
any external forces having a negative effect on the terminals.
• When the air conditioner cannot cool or heat a room well, contact the dealer from whom you purchased the air
conditioner as refrigerant leakage is considered as the cause.
In the case of repair that requires refill of refrigerant, ask service personnel about details of the repair.
The refrigerant used in the air conditioner is harmless.
Generally, the refrigerant does not leak. However, if the refrigerant leaks in a room and a heater or stove burner in the room
catches fire, it may generate toxic gas.
When you ask service personnel for repairing refrigerant leakage, confirm that the leakage portion has been completely
repaired.
• Conform to the regulations of the local electric company when wiring the power supply.
Inappropriate grounding may cause electric shock.
• Do not install the air conditioner in a location that may be subjected to a risk of exposure to a combustible gas.
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
4 EN
Digital Inverter
• Install the refrigerant pipe securely during the installation work before operating the air conditioner.
If the compressor is operated with the valve open and without the refrigerant pipe, the compressor sucks air and the
refrigeration cycle is overpressurized, which may cause a burst or injury.
• When carrying out the pump-down work, shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and with the compressor still operating will cause air, etc.
to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in
rupturing, injury, etc.
CAUTION
• Do not climb onto or place objects on top of the outdoor unit.
You may fall or the objects may fall off of the outdoor unit and result in injury.
• Wear heavy gloves during the installation work to avoid injury.
To Disconnect the Appliance from the Main Power Supply
• This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm.
• A 25 A installation fuse (all fuse types can be used) must be used for the power supply line of this conditioner.
3
INSTALLATION OF NEW REFRIGERANT AIR
CONDITIONER
CAUTION
New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE
LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the working pressure
of R410A refrigerant is approx. 1.6 times as that of refrigerant R22. Accompanied with the adoption of the new refrigerant, the
refrigerant oil has also been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or
refrigerant oil does not enter the new type refrigerant R410A air conditioner cycle.
To prevent mixing of refrigerant or refrigerant oil, the sizes of connecting sections of charging port on main unit and installation
tools are different from those of the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant
(R410A) units. For connecting pipes, use new and clean piping materials with high pressure fittings made for R410A only, so
that water and/or dust does not enter.