8
It is possible to set both the start and stop time so that
the air conditioner either starts after a predetermined
time and then stops after a further predetermined time
or stops after a predetermined time and then starts
again after a further predetermined time.
This is achieved by setting both the on and off time as
described above. For example if you require the air
conditioner to stop in 3 hours time and then start up
again 6 hours later you would program a stop time of
3 hours and a start time of 9 hours (ie. 3 + 6 hours).
CANCELLING THE START OR STOP TIME
If you change your mind and do not want the air
conditioner to automatically start or stop simply press
the PROGRAM TIMER ON/OFF BUTTON (14) and the
START or STOP TIME INDICATOR will extinguish.
DEFROST FUNCTION (Heat Pump Models only)
During heating at low outside air temperatures it is
possible for frost to build up on the outdoor unit heat
exchanger. This build up of frost will restrict the airflow
through the heat exchanger and therefore the
performance of the air conditioner will gradually be
reduced. As the outdoor unit microprocessor is
constantly monitoring system performance and
ambient temperature it will recognise that frost is
building up on the heat exchanger and activate defrost
operation.
When the unit enters the defrost mode both the indoor
and outdoor fans will stop and the DEFROST
INDICATOR ( ) will be displayed on the
remote control. The unit will remain in the defrost
mode for around 4 to 8 minutes (10 min. max.) during
which time the heat exchanger will warm up to defrost
itself.than 1°C below the selected temperature.
AUTOMATIC RESTART AFTER POWER FAILURE
If the air conditioner is operating during a power failure
it will automatically restart in the same mode when the
power is restored.
DUAL REMOTE CONTROL OPERATION (Optional)
A second (optional) remote control may be added to
the system to allow setting and control of the unit at
two different locations. This is particularly useful in
two storey applications where one controller can be
installed upstairs and the other controller downstairs.
When dual controls are used the air conditioner will
obey the last command entered into either controller.
Both controllers will display the same information so if
the temperature on the downstairs controller is
increased from 21 to 23 degrees, the upstairs
controller will also indicate 23 degrees. This feature is
not available if the optional set back time clock
(BRC15A61) is used.
NOTE: Program Timer setting is not possible from the second
(optional) remote controller.
15.8
Advanced Features
15.9
Optimum Operation
TEST
NOT
AVAILABLE
TEST
hr
hr
C
L H
14
13
16
7
Fig. 4
HOT START SYSTEM (Heat Pump Models only)
To prevent a cold draft when the air conditioner turns
on in the heating mode the indoor unit incorporates a
computer controller hot start system.
The indoor unit microprocessor monitors the
temperature of the indoor heat exchanger and
operates the indoor fan at a speed lower than the
normal low until the heat exchanger temperature
reaches a target temperature. When this target is
reached the fan switches from extra low to set speed.
(FDY90 operates at low speed)
This hot start feature is also utilised after defrost and
during the heating cycle when the compressor
switches back on after the room temperature has
fallen more than 1°C below the selected temperature.
Observe the following precautions to ensure the
system operates efficiently.
!
Adjust the room temperature for a comfortable
environment. Avoid excessive heating or cooling.
!
Prevent direct sunlight from entering a room during
cooling operation by using curtains or blinds.
!
Keep doors and windows closed. If the doors and
windows remain open, room air will flow out and
decrease the effect of cooling and heating.
!
Never place objects near the air inlet and the air
outlet of the unit. It may retard effectiveness or
cause operation to stop.
