Fujitsu UTY-LRHYM Operating Manual page 14

OPERATING TIPS
AUTO Restart
In Event of Power Interruption
G The power supply to the air conditioner is stopped by a
power interruption. The air conditioner will then restart
automatically in its previous mode when the power is
restored.
Simultaneous Use of Multiple Units
G
When using a multi-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 efficiency 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 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 recommend that you try various operating patterns
in order to confirm the level of heating and cooling out-
put provided by your units, and use the units in the way
that best matches your family's lifestyle.
G
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.
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
(green) on the indoor unit will flash (1 second on, 1 sec-
ond off) and the unit will go into the standby mode.
Heating mode and cooling mode (or dry mode)
Heating mode and fan mode
NOTES
During use of the heating mode, the outdoor unit will
G
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.
During use of the heating mode, the top of the indoor
G
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.
En-13
G If a power interruption occurs during TIMER operation, the
timer will be reset and the indoor unit will begin (or stop)
operation at the new time setting. In the event that this kind
of timer fault occurs, the TIMER Indicator Lamp will flash.
G Use of other electrical appliances (electric shaver, etc.) or
nearby use of a wireless radio transmitter may cause the
air conditioner to malfunction. In this event, temporarily
turn off the circuit breaker, turn it on and then use the
Remote Controller to resume operation.
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 op-
erating mode of the indoor unit that was operated first.
If the indoor 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 opera-
tion in fan mode but when indoor unit (B) started oper-
ating in heating mode, the OPERATION indicator lamp
(green) for indoor unit (A) would begin to flash (1 se-
cond on, 1 second off) and it would go into standby
mode. Indoor unit (B) would continue to operate in heat-
ing mode.