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Do not install the outdoor unit in two-stage where the drain water could freeze. Otherwise
the drainage from the upper unit may form ice and cause a malfunction of the lower unit.
When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe and
drain cap.
If the drain pipe and drain cap are used, the drain water in the pipe may freeze in ex-
tremely cold climate.
In area with heavy snowfall, if the inlet and outlet of the outdoor unit is blocked with snow, it
might become diffi cult to get warm, and it is likely to cause product malfunction. Construct
a canopy and a pedestal, or place the unit on a high stand that is locally installed.
5. OUTDOOR UNIT INSTALLATION
5.1. Switch cover remove
Switch cover A
Screw
Hooks
Hooks
Switch cover B
5.2. Notes for electrical wiring
Wiring connections must be performed by a qualifi ed person in accordance with
the specifi cations. The voltage rating for this product is 230 V at 50 Hz. It should be
operated within the range of 198 to 264 V.
Before connecting the wires, make sure the power supply is off.
Never touch electrical components immediately after the power supply has been
turned off. Electrical shock may occur. After turning off the power, always wait
10 minutes or more before touching electrical components.
Use a dedicated power supply circuit. Insuffi cient power capacity in the electrical circuit
or improper wiring may cause electric shock or fi re.
Be sure to install an earth leakage breaker.
Otherwise, it will cause electric shock or fi re.
A circuit breaker is installed in the permanent wiring. Always use a circuit that can trip
all the poles of the wiring and has an isolation distance of at least 3 mm between the
contacts of each pole.
Use designated cables and power cables. Improper use may cause electric shock or
fi re by poor connection, insuffi cient insulation, or over current.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or fi re by poor connection, insuffi cient insulation or over current.
Connect the connector cable securely to the terminal. Check no mechanical force bears
on the cables connected to the terminals. Faulty installation can cause a fi re.
Use ring terminals and tighten the terminal screws to the specifi ed torques, otherwise,
abnormal overheating may be produced and possibly cause serious damage inside
the unit.
Make sure to secure the insulation portion of the connector cable with the cable
clamp. Damaged insulation can cause a short circuit.
Fix cables so that cables do not make contact with the pipes (especially on high
pressure side). Do not make power supply cable and transmission cable come in
contact with valves (Gas).
Never install a power factor improvement condenser. Instead of improving the power
factor, the condenser may overheat.
En-7
CAUTION
Switch cover A,B removal
(1) Remove the tapping screws.
(2) Push downward the Switch cover B.
(3) Push upward the Switch cover A.
Installing the Switch cover A, B
(1) After inserting the two hooks of Switch
cover A, then push upward.
(2) After inserting the four hooks of Switch
cover B, then push upward, and then
tighten the tapping screw.
WARNING
Be sure to perform the grounding work.
Do not connect grounding wires to a gas pipe, water pipe, lightning rod or grounding
wire for a telephone.
• Connection to a gas pipe may cause a fi re or explosion if gas leaks.
• Connection to a water pipe is not an effective grounding method if PVC pipe is used.
• Connection to the grounding wire of a telephone or to a lightning rod may cause a
dangerously abnormal rise in the electrical potential if lightning strikes.
• Improper grounding work can cause electric shocks.
Securely install the electrical box cover on the unit. An improperly installed service
panel can cause serious accidents such as electric shock or fi re through exposure to
dust or water.
Do not connect the AC power supply to the transmission line terminal board. Improper
wiring can damage the entire system.
The primary power supply capacity is for the air conditioner itself, and does not
include the concurrent use of other devices.
If the electrical power is inadequate, contact your electric power company.
Install a breaker in a location that is not exposed to high temperatures.
If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.
When using an earth leakage breaker that has been designed solely for ground fault
protection, be sure to install a fuse-equipped switch or circuit breaker.
This system uses an inverter, which means that it must be used an earth leakage
breaker that can handle harmonics in order to prevent malfunctioning of the earth
leakage breaker itself.
Do not use crossover power supply wiring for the outdoor unit.
If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.
When the electrical switchboard is installed outdoors, place it under lock and key so
that it is not easily accessible.
Start wiring work after closing branch switch and over current breaker.
Transmission cable between indoor unit and outdoor unit is 230 V.
Be sure not to remove thermistor sensor etc. from power wiring and connection
wiring. Compressor may fail if operated while removed.
Always keep to the maximum length of the connection cable. Exceeding the maximum
length may lead to erroneous operation.
Do not start operation until the refrigerant is charged completely. The compressor will
fail if it is operated before the refrigerant piping charging is complete.
The static electricity that is charged to the human body can damage the control PC
Board when handling the control PC Board for address setting, etc.
Please keep caution to the following points.
Provide the grounding of Indoor unit, Outdoor unit and Option equipment.
Cut off the power supply (breaker).
Touch the metal section (such as the unpainted control box section) of the indoor or
outdoor unit for more than 10 seconds. Discharge the static electricity in your body.
Never touch the component terminal or pattern on the PC Board.
Be careful not to generate a spark as follows for using a fl ammable refrigerant.
• Do not remove the fuse while power is on.
• Do not disconnect plug from the wall outlet and the wiring while the power is on.
• It is recommended to position the outlet connection in a high position. Place the
cords so that they do not get tangled.
Confi rm the indoor unit model name before connecting. If the indoor unit is not R32
compatible, error signal will be displayed, and the unit will be inoperable.
How to connect wiring to the terminal
Caution when wiring cable
• When stripping off the coating of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the coating with a knife etc.
(1) Use ring terminals with insulating sleeves as shown in the fi gure below to connect
to the terminal block.
(2) Securely clamp the ring terminals to the wires using an appropriate tool so that the
wires do not come loose.
Strip : 10 mm
(3) Use the specifi ed wires, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a
screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.
WARNING
CAUTION
Ring terminal
Sleeve
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