Prohibition of
modification.
Use specified
parts.
Do not modify the products. Do not also disassemble or modify the parts.
It may cause a fire, electric shock or injury.
When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the
specifications given in the Service Manual (or use the parts contained on the parts list in the
Service Manual).
Use of any parts which do not satisfy the required specifications may give rise to electric shocks,
smoking and / or a fire.
Do not bring
a child close
to the
equipment.
Insulating
measures
No fire
Refrigerant
If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical
parts with the electrical parts box cover of one or more of the VRF Dx-coil interface removed in order
to find out exactly where the trouble lies, put a sign in place so that no-one will approach the work
location before proceeding with the work. Third-party individuals may enter the work site and receive
electric shocks if this warning is not heeded.
Connect the cut-off lead wires with crimp contact, etc., put the closed end side upward and then apply
a water-cut method, otherwise a leak or production of fire is caused at the users’ side.
When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because the oil
that coats the pipes may otherwise burn.
When repairing the refrigerating cycle, take the following measures.
1) Be attentive to fire around the cycle. When using a gas stove, etc., be sure to put out fire before work;
otherwise the oil mixed with refrigerant gas may catch fire.
2) Do not use a welder in the closed room. When using it without ventilation, carbon monoxide
poisoning may be caused.
3) Do not bring in flammables close to the refrigerant cycle, otherwise fire of the welder may catch the
in flammables.
The refrigerant used by this VRF Dx-coil interface 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.
When the VRF Dx-coil interface 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.
To add the refrigerant, follow the Installation Manual and Service Manual of the outdoor unit.
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.
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