Toshiba RAV-RM301SDT-E Service Manual page 9

This Air Conditioner has adopted a refrigerant HFC R32 or R410A.
Be sure to check the refrigerant type for outdoor unit to be combined. In case that refrigerant type is R32,
this unit uses a flammable refrigerant. If refrigerant leaks and comes in contact with fire or heating part, it
will create harmful gas and there is risk of fire.
Check the used refrigerant name and use tools and materials of the parts which match with it.
For the products which use R32 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.
Be careful for miss-charging since a charging port of R32 is the same diameter as that of R410A.
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.
Be sure to use the refrigerant (R32 or R410A) specified on the combined outdoor unit.
If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating cycle and an
injury due to breakage may be caused.
If the different type of refrigerants are mixed in, be sure to recharge the refrigerant
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.
Do not charge refrigerant additionally.
Refrigerant 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 other refrigerant 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 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, it may generate noxious gases, causing a fire.
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.
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.
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 fs side.
Assembly/
Wiring
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 fs side.
Insulator
check
When the refrigerant gas leaks during work, execute ventilation.
If the refrigerant gas touches to a fire, it may generate noxious gases, causing a fire.
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.
Ventilation If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, it may generate noxious gases, causing a fire.
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