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9
Operations and performance
▼ Check before running
• Check whether the earth wire is cut or disconnected.
• Check whether the air filter is installed.
• Turn on the circuit breaker 12 hours or more before
starting operation.
▼ 3 minutes protection function
3-minutes protection function prevents the
air conditioner from starting for initial 3 minutes after
the main power switch / circuit breaker is turned on for
restarting the air conditioner.
▼ Power failure
Power failure during operation will stop the unit
completely.
• To restart the operation, push the ON / OFF button
on the remote controller.
• Lightning or a wireless car telephone operating
nearby may cause the unit to malfunction. Turn off
the main power switch or circuit breaker and then
turn them on again. Push the ON / OFF button on the
remote controller to restart.
▼ Defrosting operation
If the outdoor unit is frosted during the heating
operation, defrosting starts automatically (for
approximately 2 to 10 minutes) to maintain the heating
capacity.
• The fans in both indoor and outdoor units will stop
during the defrosting operation.
• During the defrosting operation, the defrosted water
will be drained from the bottom plate of the outdoor unit.
▼ Heating capacity
In the heating operation, the heat is absorbed from
the outside and brought into the room. This way of
heating is called heat pump system. When the outside
temperature is too low, it is recommended to use
another heating apparatus in combination with the
air conditioner.
▼ Air conditioner operating conditions
For proper performance, operate the air conditioner under the following temperature conditions
Outdoor temperature
Room temperature
Cooling operation
Room relative humidity – less than 80%. If the air conditioner operates in
[CAUTION]
excess of this figure, the surface of the air conditioner may cause dewing.
Outdoor temperature
Heating operation
Room temperature
If air conditioner is used outside of the above conditions, safety protection may work.
25-EN
▼ Protective device
• Stops operation when the air-conditioner is
overloaded.
• If the protective device is activated, the unit stops
running, and the operation indicator and check
indicator on the remote controller blink.
▼ If the protective device is activated
• Turn off the circuit breaker and perform a checkup.
Continued running may cause a malfunction.
• Check whether the air filter is installed. If not, the
heat exchanger may be clogged with dust and water
leakage may occur.
▼ During cooling
• The air intake or discharge of the outdoor unit is
clogged.
• Strong wind continuously blows against the outlet of
the outdoor unit.
▼ During heating
• The air filter is clogged with a large amount of dust.
• The air intake or discharge of the indoor unit is
clogged.
▼ Do not turn off the circuit breaker
• During the air-conditioning season, leave the circuit
breaker turned on, and use the ON / OFF key on the
remote controller.
▼ Attention to snowfall and freeze on the
outdoor unit
• In snowy areas, the air intake and air discharge
of the outdoor unit are often covered with snow or
frozen up. If snow or freeze on the outdoor unit is
left as it is, it may cause machine failure or poor
warming.
• In cold areas, pay attention to the drain hose so that
it perfectly drains water without water remaining
inside for freeze prevention. If water freezes in the
drain hose or inside the outdoor unit, it may cause
machine failure or poor warming.
: –15°C to 46°C (Dry bulb temp.)
: 21°C to 32°C (Dry bulb temp.), 15°C to 24°C (Wet bulb temp.)
: –20°C to 15°C (Wet bulb temp.)
: 15°C to 28°C (Dry bulb temp.)
– 13 –
10
Installation
Do not install the air conditioner in the following places
• Do not install the air conditioner in any place within 1 m from a TV, stereo, or radio set. If the unit is installed in
such place, noise transmitted from the air conditioner affects the operation of these appliances.
• Do not install the air conditioner near a high frequency appliance (such as sewing machine or massager for
business use), otherwise the air conditioner may malfunction.
• Places where iron or other metal dust is present. If iron or other metal dust adheres to or collects on the interior of
the air conditioner, it may spontaneously combust and start a fire.
• Do not install the air conditioner in a humid or oily place, or in a place where steam, soot, or corrosive gas is
generated.
• Do not install the air conditioner in a salty place such as seaside area.
• Do not install the air conditioner in a place where a great deal of machine oil is used.
• Do not install the air conditioner in a place where it is usually exposed to strong wind such as in seaside area.
• Do not install the air conditioner in a place where sulfureous gas generated such as in a spa.
• Do not install the air conditioner in a vessel or mobile crane.
• Do not install the air conditioner in an acidic or alkaline atmosphere (in a hot-spring area or near a chemicals
factory, or in a place subject to combustion emissions). Corrosion may be generated on the aluminum fin and
copper pipe of the heat exchanger.
• Do not install the air conditioner near an obstacle (such as air vent, lighting equipment) that disturbs discharge air.
(Turbulent airflow may reduce the performance or disable devices.)
• Do not use the air conditioner for special purposes such as preserving food, precision instruments, or art objects,
or where breeding animals or growing plants are kept. (This may degrade the quality of preserved materials.)
• Do not install the air conditioner over an object that must not get wet. (Condensation may drop from the indoor unit
at a humidity of 80% or more or when the drain port is clogged.)
• Do not install the air conditioner in a place where an organic solvent is used.
• Do not install the air conditioner near a door or window subject to humid outside air. Condensation may form on
the air conditioner.
• Do not install the air conditioner in a place where special spray is used frequently.
Be careful with noise or vibrations
• Do not install the air conditioner in a place where noise by outdoor unit or hot air from its air discharge annoys
your neighbours.
• Install the air conditioner on a solid and stable foundation so that it prevents transmission of resonating, operation
noise and vibration.
• If one indoor unit is operating, some sound may be audible from other indoor units that are not operating.
26-EN
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