Hitachi RAS-5182CH Service Seite 68

SERVICE CALLQ&A
* Cooling operation |
While cooling, the com-
pressor. sometimes stops
abruptly.
Check whether frost sticks
on the heat exchanger of
indoor unit or not.
lf cooling is performed when
the room temperaiure is low,
frost may stick on the heat
Dehumidifying operation
The fan speed does not
change during a dehumidi-
fying operation.
Cold air comes out during
a dehumidifying operation.
The operation does not
stop even by raising the
room temperature setting
of remote control at a
dehumidifying operation.
Inthe dehumidifying mode,
the temperature set by re-
mote controller is set
slightly higher than the
room temperature but the
operation starts.
Wait for 3-4 minutes until
the frost melts.
The fan speed is always
LO at a dehumidifying op-
eration.
To improve the dehumicdifi-
cation efficiency, LO fan
speed operation is per-
formed. Therefore the air is
cold. This is not a trouble.
At a dehumidifying operation,
the actual room temperature is
compared with the room tem-
perature setting when starting
the operation and the operation
is as follows.
1) When actual room tem-
perature > room tempera- .
ture setting.
The operation is according
to the room temperature
setting on the remote con-
troller.
2) *When actual room tem-
perature < room tempera-
ture setting
Regardless of the room
temperature setting, the
temperature is automati-
cally set slightly lower than
the room temperature.
In this case, the status is as (2)
and, therefore, the operation by
the room temperaute control is
impossible. Turn off the ON / -
OFF switch, set the room tem-
perature to a new value and
turn on the operation by the On/
Off button.
This is the status in 2) of
(A4). The temperature is
set a little lower than the
room temperature to carry
out a dehumidifying
'operation as far as
possilble.
a ae
exchanger of indoor unit.