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Refrigerant
The refrigerant used by this air conditioner is the R410A.
Check the used refrigerant name and use tools and materials of the parts which match with it.
For the products which use R410A refrigerant, the refrigerant name is indicated at a position on the
outdoor unit where is easy to see. To prevent miss-charging, the route of the service port is changed
from one of the former R22.
Do not use any refrigerant different from the one specified 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.
For an air conditioner which uses R410A, never use other refrigerant than R410A.
For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.
If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating cycle
and an injury due to breakage may be caused.
Do not charge refrigerant additionally. If charging refrigerant additionally when refrigerant gas leaks,
the refrigerant composition in the refrigerating cycle changes resulted in change of air conditioner
characteristics or refrigerant over the specified standard amount is charged and an abnormal high
pressure is applied to the inside of the refrigerating cycle resulted in cause of breakage or injury.
Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute vacuuming,
and then newly recharge the specified amount of liquid refrigerant. In this time, never charge the
refrigerant over the specified amount.
When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant or air other than
R410A into the specified refrigerant. If air or others is mixed with the refrigerant, abnormal high
pressure generates in the refrigerating cycle resulted in cause of injury due to breakage.
After installation work, check the refrigerant gas does not leak. If the refrigerant gas leaks in the room,
poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove though
the refrigerant gas itself is innocuous.
Never recover the refrigerant into the outdoor unit. When the equipment is moved or repaired, be sure
to recover the refrigerant with recovering device. The refrigerant cannot be recovered in the outdoor
unit; otherwise a serious accident such as breakage or injury is caused.
Assembly/
Cabling
After repair work, surely assemble the disassembled parts, and connect and lead the removed wires
as before. Perform the work so that the cabinet or panel does not catch the inner wires. If incorrect
assembly or incorrect wire connection was done, a disaster such as a leak or fire is caused at user’s
side.
Insulator check
After the work has finished, be sure to use an insulation tester set (500V Megger) to check the
resistance is 1MΩ or more between the charge section and the non-charge metal section
(Earth position). If the resistance value is low, a disaster such as a leak or electric shock is caused at
user’s side.
Ventilation
When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches to a fire,
poisonous gas generates. A case of leakage of the refrigerant and the closed room full with gas is
dangerous because a shortage of oxygen occurs. Be sure to execute ventilation.
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 or servicing 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.
Compulsion
When the refrigerant gas leaks, find up the leaked position and repair it surely. If the leaked position
cannot be found up and the repair work is interrupted, pump-down and tighten the service valve,
otherwise the refrigerant gas may leak into the room. The poisonous gas generates when gas touches
to fire such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous. When
installing equipment which includes a large amount of charged refrigerant such as a multi air
conditioner in a sub-room, it is necessary that the density does not the limit even if the refrigerant
leaks. If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is
caused.
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.
Nitrogen gas must be used for the airtight test.
The charge hose must be connected in such a way that it is not slack.
For the installation/moving/reinstallation work, follow to the Installation Manual. If an incorrect
installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused.