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Precautions for safety
The manufacturer shall not assume any liability for the damage caused by not observing the
description of this manual.
WARNING
General
• Carefully read Owner's Manual before starting the air conditioner. There are many important things
to keep in mind for daily operation.
• Ask for installation to be performed by the dealer or a professional. Only a qualifi ed installer is
able to install an air conditioner. If a non-qualifi ed person installs an air conditioner, it may result in
problems such as fi re, electric shock, injury, water leakage, noise and vibration.
• Do not use any refrigerant different from the one specifi ed for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result
in a failure or explosion of the product or an injury to your body.
• Before opening the service panel of the outdoor unit, set the circuit breaker to the OFF position.
Failure to set the circuit breaker to the OFF position may result in electric shocks through contact
with the interior parts.
• Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit
breakers for both the indoor and outdoor units to the OFF position. Otherwise, electric shock may
result.
• Wear protective gloves and safety work clothing during installation, servicing and removal.
• Do not touch the aluminium fi n of the outdoor unit. You may injure yourself if you do so. If the fi n
must be touched for some reason, fi rst put on protective gloves and safety work clothing, and then
proceed.
• 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.
• Before cleaning the fi lter or other parts of the outdoor unit, set the circuit breaker to OFF without
fail, and place a "Work in progress" sign near the circuit breaker before proceeding with the work.
• The refrigerant used by this air conditioner is the R410A.
• The air conditioner must be transported in stable condition. If any part of the product are broken,
contact your distributor.
• We do not take any responsibility on the local design.
Selection of installation location
• Do not install in a location where fl ammable gas leaks are possible. If the gas should leak and
accumulate around the unit, it may ignite and cause a fi re.
• During transporting the air conditioner, wear shoes with protective toe caps, protective gloves, and
other protective clothing.
• To transport the air conditioner, do not take hold of the bands around the packing carton. You may
injure yourself if the bands should break.
• Places where the operation sound of the outdoor unit may cause a disturbance. (Especially at the
boundary line with a neighbour, install the air conditioner while considering the noise.)
Installation
• The designated bolts (M12) and nuts (M12) for securing the outdoor unit must be used when
installing the unit.
• Install the outdoor unit property in a location that is durable enough to support the weight of the
outdoor unit. Insuffi cient durability may cause the outdoor unit to fall, which may result in injury.
• Install the unit in the prescribed manner for protection against strong wind and earthquake.
Incorrect installation may result in the unit falling down, or other accidents.
• Fix the screws back which have been removed for installation or other purposes.
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Refrigerant piping
• 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 refrigerant pipe, the compressor
sucks air and the refrigeration cycles is over pressurized, which may cause a injury.
• Tighten the fl are nut with a torque wrench in the specifi ed manner. Excessive tighten of the fl are
nut may cause a crack in the fl are nut after a long period, which may result in refrigerant leakage.
• When the air conditioner has been installed or relocated, follow the instructions in the Installation
Manual and purge the air completely so that no gases other than the refrigerant will be mixed
in the refrigerating cycle. Failure to purge the air completely may cause the air conditioner to
malfunction.
• Nitrogen gas must be used for the airtight test.
Electrical wiring
• Only a certifi ed installer or qualifi ed service person is allowed to carry out the electrical work of the
air conditioner.
• When connecting the electrical wires, repairing the electrical parts or undertaking other electrical
jobs, wear gloves to provide protection for electricians and from heat, insulating shoes and clothing
to provide protection from electric shocks.
Failure to wear this protective gear may result in electric shocks.
• When executing address setting, test run, or troubleshooting through the checking window on the
electric parts box, put on insulated heat-proof gloves, insulated shoes and other clothing to provide
protection from electric shock. Otherwise you may receive an electric shock.
• Use wiring that meets the specifi cations in the Installation Manual, NEC and the local codes.
• Check that the product is properly grounded.
• Do not connect the ground line to a gas pipe, water pipe, lightning conductor, or a telephone
ground line.
• After completing the repair or relocation work, check that the ground wires are connected properly.
• Install a circuit breaker that meets the specifi cations in the installation manual, NEC and local
codes.
• Under no circumstances must the power cable be extended. Connection trouble in the places
where the cable is extended may give rise to smoking and/or a fi re.
• Do not supply power from the power terminal block equipped on the outdoor unit to another
outdoor unit. Capacity overfl ow may occur on the terminal block and may result in fi re.
• Each outdoor unit should have its own power supply.
Test run
• Before operating the air conditioner after having completed the work, check that the electrical parts
box cover of the indoor unit and service panel of the outdoor unit are closed, and set the circuit
breaker to the ON position. You may receive an electric shock if the power is turned on without fi rst
conducting these checks.
• If there is any kind of trouble (such as when a check code display has appeared, there is a smell
of burning, abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking)
has occurred in the air conditioner, do not touch the air conditioner yourself but set the circuit
breaker to the OFF position, and contact a qualifi ed service person.
Take steps to ensure that the power will not be turned on (by marking "out of service" near the
circuit breaker, for instance) until qualifi ed service person arrives. Continuing to use the air
conditioner in the trouble status may cause mechanical problems to escalate or result in electric
shocks or other failure.
• Upon completion of the installation work, check for refrigerant leaks and check the insulation
resistance and water drainage.
Then conduct a test run to check that the air conditioner is operating properly.
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