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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 an injury.
Tighten the flare nut with a torque wrench in the specified manner. Excessive tighten of the flare nut may cause a crack in the flare
nut after a long period, which may result in refrigerant leakage.
Ventilate the air if the refrigerant gas leaks during installation. If the leaked refrigerant gas comes into contact with fire, toxic gas may
be produced.
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.
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.
The charge hose must be connected in such a way that it is not slack.
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.
Electrical Wiring
Only a qualified installer (*1) or qualified service person (*1) is allowed to carry out the electrical work of the air conditioner. Under no
circumstances must this work be done by an unqualified individual since failure to carry out the work properly may result in electric
shocks and/or electrical leaks.
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 electrical control 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 specifications in the Installation Manual and the stipulations in the local regulations and laws. Use of wiring
which does not meet the specifications may give rise to electric shocks, electrical leakage, smoking and/or a fire.
Check that the product is properly earthed. (grounding work) Incomplete earthing may cause electric shock.
Do not connect the earth wire to a gas pipe, water pipe, lightning conductor, or a telephone earth wire.
After completing the repair or relocation work, check that the ground wires are connected properly.
Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local regulations and laws.
Install the circuit breaker where it can be easily accessed by the agent.
When installing the circuit breaker outdoors, install one which is designed to be used outdoors.
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 fire.
Electrical wiring work shall be conducted according to law and regulation in the community and installation manual. Failure to do so
may result in electrocution or short circuit.
Do not supply power from the power terminal block equipped on the outdoor unit to another outdoor unit. Capacity overflow may
occur on the terminal block and may result in fire.
When carrying out electric connection, use the wire specified in the Installation Manual and connect and fix the wires securely to
prevent them applying external force to the terminals. Improper connection or fixing may result in fire.
Test Run
Before operating the air conditioner after having completed the work, check that the electrical control 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 first conducting these checks.
When you have noticed that some kind of trouble (such as when an error 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 qualified 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 qualified 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.
After the work has finished, be sure to use an insulation tester set (500 V Megger) to check the resistance is 2 MΩ or more between
the charge section and the non-charge metal section (Earth section). If the resistance value is low, a disaster such as a leak or
electric shock is caused at user's side.
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.
Explanations Given To User
Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does not know where the circuit
breaker is, he or she will not be able to turn it off in the event that trouble has occurred in the air conditioner.
If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position,
and contact a qualified service person(*1) to have the repairs done. Do not set the circuit breaker to the ON position until the repairs
are completed.
After the installation work, follow the Owner's Manual to explain to the customer how to use and maintain the unit.
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