Fujitsu iGENERAL AOH30QMAM4 Operating Manual page 18

OPERATING TIPS
Multi-type Air conditioner
This indoor unit can be connected to a multi-type outdoor unit. The multi-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
G When using a multi-type air conditioner, the multiple in-
door units can be operated simultaneously, but when two
or more indoor units of the same group are operated si-
multaneously, the heating and cooling efficiency will be
less than when a single indoor unit is used alone. Ac-
cordingly, when you wish to use more than one indoor
unit for cooling at the same time, the use should be con-
centrated 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 heat-
ers, as required.
G Seasonal and outdoor temperature conditions, the struc-
ture of the rooms and the number of persons present may
also result in differences of operating efficiency. We rec-
ommend that you try various operating patterns in order
to confirm the level of heating and cooling output pro-
vided by your units, and use the units in the way that
best matches your family's lifestyle.
G If you discover that one 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.
G Operation cannot be done in the following different op-
erating modes.
If the indoor unit is instructed to do an operating mode
that it cannot perform, the OPERATION indicator lamp
(red) on the indoor unit will flash (1 second on, 1 second
off) and the unit will go into the standby mode.
Heating mode and cooling mode (or dry mode)
Heating mode and fan mode
Notice
G During use of the heating mode, the outdoor unit will
occasionally commence the defrost operation for brief
periods. During the defrosting operation, if the user sets
the indoor unit for heating again, the defrosting mode
will continue, and the heating operation will begin after
completion of defrosting, with the result that some time
may be required before warm air is emitted.
En-17
G Operation can be done in the following different operat-
ing modes.
Cooling mode and dry mode
Cooling mode and fan mode
Dry mode and fan mode
G The operating mode (heating mode or cooling (dry) mode)
of the outdoor unit will be determined by the operating
mode of the indoor unit that was operated first. If the in-
door unit was started in fan mode, the operating mode of
the outdoor unit will not be determined.
For example, if indoor unit (A) was started in fan mode
and then indoor unit (B) was then operated in heating
mode, indoor unit (A) would temporarily start operation
in fan mode but when indoor unit (B) started operating in
heating mode, the OPERATION indicator lamp (red) for
indoor unit (A) would begin to flash (1 second on, 1 sec-
ond off) and it would go into standby mode. Indoor unit
(B) would continue to operate in heating mode.
G During use of the heating mode, the top of the indoor
unit may become warm, but this is due to the fact that
coolant is circulated through the indoor unit even when
it is stopped; it is not a malfunction.