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About the Multiple Air-conditioner
Simultaneous Operation
• The air-conditioners cannot be in different operating modes at the same time, such as one unit being in the “Cool” mode and one unit being in
the “Heat” mode.
• When conducting different operations, the air conditioner that was operated first will be given priority, so the air conditioner that is operated
after that will conduct air blowing operation.
• When you want to give priority to the air conditioner that was started later, either stop the air conditioner that has priority or cause the operation
type of the unit operated first to match that of the unit operated second.
Automatic Operation
• When the remote controller operation switch is in the “Auto” mode the air-conditioner automatically selects either “Cool,” “Dry,” or “Heat”
when operation is started depending on the room temperature.
• During simultaneous operation of air-conditioner units, operation modes may be automatically changed in response to the temperatures of the
individual rooms; this will result in the operation of the out-door unit being stopped. In such a case, COOL or HEAT mode should be used
instead of AUTO. (This is only relevant when more than one air-conditioner unit is being used.)
Refrigerant (oil) recovery operation
• If the all of the indoor units are not operated at the same time for an extended period, the cooling or heating performance may temporarily
decrease. This is in order to control the recovery of the refrigerant (oil) in the stopped indoor unit(s). At this time, the sound of refrigerant
flowing may be heard from the stopped indoor unit(s).
The air conditioner does not work at all.
Has the timer been set in the
"ON" position?
Has the power switch been
turned off?
Is there a power failure or a
blown fuse?
Troubleshooting
Please carry out the following checks before making a service call.
Poor cooling
Poor cooling or heating
Did you leave any doors or
windows open?
Have you set the thermostat at a
suitable temperature?
Is there a heat source in the
room?
Are there too many people in
the room?
Is the air filter clean? (Not
clogged?)
suitable
temperature
Is there any direct sunlight en-
tering the room?
If the air conditioner does not oper-
ate properly after you have checked
the left points, or if any doubt still
exists after you have consulted page
18, or if things happen as shown on
page 19, switch off the power and
contact your dealer.
A new refrigerant (R410A) is used in this air-conditioner. When asking the dealer for
service or inspection and maintenance, explain the dealer about this matter.
RWA012A226_En 03.8.27, 6:47 PM17