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9.4. Multi-split type air conditioner
NOTE: Depending on model, this function cannot be used. For details,
consult authorized service personnel.
This indoor unit can be connected to a multi-split type outdoor unit. The
multi-split type air conditioner allows multiple indoor units to be operated
in multiple locations. The indoor units may be operated simultaneously,
in accordance with their respective output.
Simultaneous Use of Multiple Units
● When using a multi-split type air conditioner, the multiple indoor units
can be operated simultaneously, but when 2 or more indoor units of
the same group are operated simultaneously, the heating and cooling
effi ciency will be less than when a single indoor unit is used alone.
Accordingly, when you wish to use more than 1 indoor unit for cooling
at the same time, the use should be concentrated at night and other
times when less output is required. In the same way, when multiple
units are used simultaneously for heating, it is recommended that they
be used in conjunction with other auxiliary space heaters, as required.
● Seasonal and outdoor temperature conditions, the structure of
the rooms and the number of persons present may also result in
diff erences of operating effi ciency. We recommend that you try various
operating patterns in order to confi rm the level of heating and cooling
output provided by your units, and use the units in the way that best
matches your family's lifestyle.
● If you discover that 1 or more units delivers a low level of cooling or
heating during simultaneous operation, we recommend that you stop
simultaneous operation of the multiple units.
● Operation cannot be done in the following diff erent operating modes.
Heating mode and Cooling mode (or Dry mode)
Heating mode and Fan mode
● Operation can be done in the following diff erent operating modes.
Cooling mode and Dry mode
Cooling mode and Fan mode
Dry mode and Fan mode
● The operating mode (Heating mode or Cooling (Dry) mode) of the out-
door unit will be determined by the operating mode of the indoor unit
that was operated fi rst. If the indoor unit was started in the Fan mode,
the operating mode of the outdoor unit will not be determined.
For example, if indoor unit (A) was started in the Fan mode and then
indoor unit (B) was then operated in the Heating mode, indoor unit (A)
would temporarily start operation in the Fan mode but when indoor
unit (B) started operating in the Heating mode, indoor unit (A) would
go into standby mode. Indoor unit (B) would continue to operate in the
Heating mode.
9.5. Simultaneous Multi-split Air Conditioner
This indoor unit can also be connected to a simultaneous multi-split
connection that enables simultaneous operation of multiple indoor units
by connecting the outdoor unit using a separation tube.
NOTES:
• The number of connectable indoor units and connectable type of the
separation tube vary by model.
• Depending on model, this function cannot be used. For details,
consult authorized service personnel.
In simultaneous multi-split connection, all indoor units can be operated
simultaneously, from one remote controller connected to the primary
indoor unit.
For this unique characteristic of the simultaneous multi-split connection,
the functions of other indoor units may be restricted.
10. TROUBLESHOOTING
WARNING
In following events, immediately stop the operation of
the air conditioner, and disconnect all the power supply
by turning off the electrical breaker or disconnecting
the power plug. Then consult your dealer or authorized
service personnel.
As long as the unit is connected to the power supply, it
is not insulated from the power supply even if the unit is
turned off .
• Unit smells of something burning or emits smoke
• Water leaks from the unit
Does not operate at all.
□ Has there been a power outage?
In this case, the unit restarts automatically after the power supply
is resumed. (Refer to page 5.)
□ Has the circuit breaker been turned off ?
⇒ Turn on the circuit breaker.
□ Has a fuse blown out or the circuit breaker been tripped?
⇒ Replace the fuse or reset the circuit breaker.
□ Is the timer operating?
⇒ To check or deactivate the timer setting, Refer to the operation
manual of the remote controller.
Poor cooling or heating performance.
□ Is the unit operating under the conditions except the permissible
temperature range?
In this case, the air conditioner may stop because of the automatic
protection circuit working.
□ Is the air fi lter dirty?
⇒ Clean the air fi lter. (Refer to page 4.)
□ Is the intake grille or outlet port of indoor unit blocked?
⇒ Remove the obstructions.
□ Is the room temperature adjusted appropriately?
⇒ To change the setting temperature, refer to the operation
manual of the remote controller.
□ Is a window or door left opened?
⇒ Close the window or the door.
□ Is the fan operating at a low speed?
⇒ To change the fan speed, refer to the operation manual of the
remote controller.
□ Is the air conditioner in the Economy operation?
⇒ To stop the Economy operation, refer to the operation manual
of the remote controller.
□ <In the Cooling mode> Is direct or strong sunlight shining into the
room?
⇒ Close the curtains.
□ <In the Cooling mode> Are there other heating appliances or
computers operating, or too many people in the room?
⇒ Turn the heating appliance or computers off , or set the
temperature lower.
Airfl ow is weak or stops.
□ Is the fan operating at a low speed?
⇒ To change the fan speed, refer to the operation manual of the
remote controller.
□ Has the Fan Control for Energy Saving set? In this case, the
indoor unit fan may stop intermittently while the Cooling operation.
⇒ To deactivate this function, refer to the operation manual of the
remote controller.
* This function cannot be deactivated when the fan speed is set to
Auto.
En-6
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