ii
IMPORTANT!
Please Read Before Starting
This air conditioner must be installed by the sales dealer
or installer.
This information is provided for use only by authorized
persons.
For safe installation and trouble-free operation, you must:
Carefully read this instruction booklet before beginning.
Follow each installation or repair step exactly as shown.
This air conditioner shall be installed in accordance with
National Wiring Regulations.
This product is intended for professional use.
Permission from the power supplier is required when
installing the U-4LE1E8, U-5LE1E8, U-6LE1E8,
outdoor units that are connected to a 16 A distribution
network.
This equipment complies with EN/IEC 61000-3-12
provided that the short-circuit power Ssc is greater
than or equal to the following table at the interface point
between the user’s supply and the public system.
It is the responsibility of the installer or user of
the equipment to ensure, by consultation with the
distribution network operator if necessary, that the
equipment is connected only to a supply with a short-
circuit power Ssc greater than or equal to the value in
the table.
U-4LE1E5 U-5LE1E5 U-6LE1E5
Ssc 350 kVA 400 kVA 550 kVA
This equipment complies with EN/IEC 61000-3-11
provided that the system impedance Zmax is less than
or equal to the values corresponding to each model as
shown in the table below at the interface point between
the user’s supply and the public system. Consult with
the supply authority for the system impedance Zmax.
U-4LE1E5 U-5LE1E5 U-6LE1E5
Zmax 0.298
Ω
0.298
Ω
0.298
Ω
Pay close attention to all warning and caution notices
given in this manual.
WARNING
This symbol refers to a hazard or unsafe
practice which can result in severe
personal injury or death.
CAUTION
This symbol refers to a hazard or unsafe
practice which can result in personal injury
or product or property damage.
If Necessary, Get Help
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for
improper installation or maintenance service, including
failure to follow the instructions in this document.
SPECIAL PRECAUTIONS
WARNING
When Wiring
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing
are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this
system.
Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and
inadequate grounding can cause accidental injury or
death.
• Connect all wiring tightly. Loose wiring may cause
overheating at connection points and a possible fire
hazard.
• Provide a power outlet to be used exclusively for each
unit.
• ELCB must be incorporated in the fixed wiring.
Circuit breaker must be incorporated in the fixed wiring
in accordance with the wiring regulations.
U-4LE1E5 U-5LE1E5 U-6LE1E5
Circuit breaker
30 A 40 A 40 A
U-4LE1E8 U-5LE1E8 U-6LE1E8
Circuit breaker
20 A 20 A 20 A
• Provide a power outlet exclusively for each unit, and
full disconnection means having a contact separation
in all poles must be incorporated in the fixed wiring in
accordance with the wiring rules.
• To prevent possible hazards from insulation failure,
the unit must be grounded.
When Transporting
Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges
or thin aluminum fins on the air conditioner can cut your
fingers.
MiniVRFeng.indd2 2011/08/2511:41:37
When Connecting Refrigerant Tubing
• Ventilate the room well, in the event that is refrigerant
gas leaks during the installation. Be careful not to allow
contact of the refrigerant gas with a flame as this will
cause the generation of poisonous gas.
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces
of the flare and union tubes before connecting them,
then tighten the nut with a torque wrench for a leak-free
connection.
• Check carefully for leaks before starting the test run.
• Do not leak refrigerant while piping work for an
installation or re-installation, and while repairing
refrigeration parts.
Handle liquid refrigerant carefully as it may cause
frostbite.
WARNING
•When performing piping work do
not mix air except for specified
refrigerant (R410A) in refrigeration
cycle. It causes capacity down, and
risk of explosion and injury due to
high tension inside the refrigerant
cycle.
•Refrigerant gas leakage may cause
fire.
Do not add or replace refrigerant
other than specified type.
It may cause product damage, burst
and injury etc.
•
When Servicing
• Turn the power OFF at the main power box
(mains) before opening the unit to check or repair
electrical parts and wiring.
•
Keep your fingers and clothing away from any moving
parts.
• Clean up the site after you finish, remembering to
check that no metal scraps or bits of wiring have been
left inside the unit being serviced.
WARNING
•
•
Do not clean inside the indoor and
outdoor units by users. Engage
authorized dealer or specialist for
cleaning.
In case of malfunction of this
appliance, do not repair by yourself.
Contact to the sales dealer or service
dealer for a repair.
CAUTION
• Do not touch the air inlet or the
sharp aluminum fins of the
outdoor unit. You may get injured.
• Ventilate any enclosed areas when
installing or testing the refrigeration
system. Escaped refrigerant gas, on
contact with fire or heat, can produce
dangerously toxic gas.
• Confirm after installation that no
refrigerant gas is leaking. If the gas
comes in contact with a burning stove,
gas water heater, electric room heater
or other heat source, it can cause the
generation of poisonous gas.
Others
CAUTION
•
•
•
Do not touch the air inlet or the
sharp aluminum fins of the
outdoor unit. You may get injured.
Do not sit or step on the unit,
you may fall down accidentally.
Do not stick any object into the
FAN CASE.
You may be injured and the
unit may be damaged.
When Installing…
Select an installation location which is rigid and strong
enough to support or hold the unit, and select a location
for easy maintenance.
…In a Room
Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to
walls and floors.
CAUTION
Keep the fire alarm and the air outlet at least
1.5 m away from the unit.
…In Moist or Uneven Locations
Use a raised concrete pad or concrete blocks to provide
a solid, level foundation for the outdoor unit. This prevents
water damage and abnormal vibration.
…In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.
…In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.
SM830195-04_Mini VRF SYS.indb 3 15/01/09 16:08:15
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