Hitachi RAC-50FPA, Service Manual

Page: 12 / 101

ENGLISH
– 11 –
HEA
TING OPERA
TION
ƽ
Use the device for heating when the outdoor temperature is under 21°C. When it is too warm (over 21°C), the heating function may not work in order to protect the device.
ƽ
Press the MODE selector button so that the display indicates (HEA
T).
Set the desired F
AN SPEED with the (F
AN SPEED) button
(the display indicates the setting). Set the
desired room temperature with the
TEMPER
A
T
URE button
s
(the display indicates the setting). The temperature setting and the actual room temperature may vary depending on conditions. Press the
(ST
A
R
T/ST
OP) button. Heating operation starts with
a beep. Press the button again to stop operation.
Ƶ Ƶ
During
AUT
O fan, the fan speed automatically changes as below:
ƽ
When the di
ff
erence between room temperature and setting temperatur
e
is large, fan starts to run at HI speed.
ƽ
After room temperature reaches the preset temperature, fan speed will be changed to lower speed to obtain optimum room temperature condition for natural healthy heating.
ST
ART
ST
OP
Ƶ
Defrosting
Defrosting will be performed about once an hour when frost forms on the heat exchange of the outdoor unit, for 5~10 minutes each time. During defrosting operation, the operation lamp blinks in a cycle of 3 seconds on and 0.5 second of
f.
The maximum time for defrosting is 20 minutes. (If the piping length used is longer than usual, frost is likely to form.)
1
2 3
In
order
to maintain reliabilit
y of the device, please use th
is device when outdoor temperatur
e
is above -15°C.
(AUT
O)
(HIGH)
(MED)
(LOW)
(SILENT)
Ƶ
As the settings are stored in the memo
ry of the remote controller, you only
have to press the (ST
AR
T/ST
OP) button next time.
However, if the indoor unit is connected to multi type ou
tdoor unit, the maximum time for defrosting is 15 minutes.
– 10 –
AUTOMA
TIC OPERA
TION
The device will automatically determine the mode of operation, HEA
T
or COOL
depending on the current
room temperature.
The selected mode of operation will change when the room temperature varies.
However
, the mode of operation will not change when indoor unit is connected to multi type outdoor unit.
V
ARIOUS FUNCTIONS
Ƶ
Auto Restart Control
ƽ
If there is a power failure, operation will be automatically restarted when the power is resumed with previous operation mode and airflow direction. (As the operation is not stopped by remote controller
.)
ƽ
If you intend not to continue the operation when the power is resumed, switch of
f the power supply
.
When you switch on the circuit breaker
, the operation will be automatically restarted with previous operation mode
and air flow
direction.
Note:
1. If you do not require
Auto Restart Control, please consult your sales agent.
2. Auto Restart Control is not available when
T
imer or Sleep
T
imer mode is set.
Press the MODE selector button so that the display indicates the (AUT
O) mode of operation.
ƽ
When
AUT
O
has been selected, the device will automatically
determine the mode of operation, HEA
T
or COOL
depending on
the current room temperature. However the mode of operation
will
not change when indoor unit is connected to multi type outdoor unit.
ƽ
If the mode automatically selected by the unit is not satisfactory
,
manually change the mode setting (HEA
T
, DEHUMIDIFY
, COOL
or F
AN).
Press the
(F
AN SPEED) button to select
AUT
O
, HI, MED, LOW or
SILENT
.
Press the
(ST
AR
T/ST
OP) button.
Operation starts with a beep. Press the button again to stop operation. Set the desired room temperature with the
TEMPERA
TURE buttons
(the display indicates the setting).
The temperature setting and the actual room temperature may vary
depending on conditions.
ST
ART
ST
OP
1 3 2
Set the desired F
A
N SPEED with the
(F
AN SPEED) button (the
display indicates the setting).
(AUT
O)
(HIGH)
(MED)
(LOW)
(SILENT)
Ƶ
As the settings are stored in
th
e memory
the remote controller
, you
(ST
AR
T/ST
OP) button next time.
only have to press the
of
12