Hitachi RAF-25FX8 Service Manual page 132

AUTO FRESH DEFROSTING
Q1 After the ON/OFF button is pressed to
stop heating, the outdoor unit is still
working with the OPERARION lamp
lighting.
AUTO OPERATION
Q1
Fan speed does not change when fan
speed selector is changed duning auto
operation.
Q2
How is the automatic operation mode
determined?
Q3
The room temperature cannot be
controlled at an automatic operation.
NICE TEMPERATURE RESERVATION
Q1
When on-timer has been programmed,
operation starts before the preset time
has been reached.
Q2
Does "Nice temperature reservation"
function operate during dehumidifying?
Q3
Even if the same time is preset, the
operation start time varies.
A1 Auto Fresh Defrosting is carried out : the system
checks the outdoor heat exchanger and defrosts it
as necessary before stopping operation.
A1
At this point fan speed is automatic.
A2
According to the room temperature and outside
temperature, heating or cooling operation is
automatically selected. Refer to the basic
operation section.
A3
It is automatically set as follows.
At cooling: and heating: Set at 22°C
The room temperature setting can be raised 3°C
by " " or lowered 3°C by "
A1
This is because "Nice temperature reservation"
function is operating. This function starts operation
earlier so the preset temperature is reached at
the preset time. Operation may start maximum 60
minutes before the preset time.
A2
It does not work. It works only during cooling and
heating.
This is because "Nice temperature reservation"
A3
function is operating. The start time varies
according to the load of room. Since load varies
greatly during heating, the operation start time is
corrected, so it will very each day.
– 150 –
".