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Hitachi RAF-25NH5 Instructions De Service page 169

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ASIC MODE
Operation mode
Fan
Basic operation of
start / stop switch
Off-timer
On-timer
Changes from "Hi" to "Med"
or "Lo" depending on room
temperature.
Auto
Temperature set
for cooling
Thermo judgment
Compressor
Hi
Med
Lo
1. Runs at "Hi" until first
thermo off after operation
is started.
2. Runs at "Lo" when thermo
is off.
Hi
Operates at "Hi" regardless of
et to "Ultra-Hi" when the
the room temperature.
compressor runs at maximum
speed, and to "Hi" in other
modes.
Operates at "Med" regardless
ame as at left.
Med
of the room temperature.
Lo
Operates at "Lo" regardless of
ame as at left.
the room temperature.
Basic operation of
Performs only fan operation at
ee page 203.
temperature controller
the set speed regardless of
the room temperature.
tart / stop swith
Operation lamp
Hi
Med
Lo
Hi
Med
Lo
leep operation
Enters sleep operation after
ame as at left.
(with sleep button ON)
set as on the left.
ee page 207.
Action during sleep operation
silent (sleep) operation
Combination of operations:
When operation mode is selected:
You cannot operate the indoor units in the following combinations.
The indoor unit which is switched on first continues to operate, but other
indoor units which is switched on later, does not operate while the lamp lights.
All manuals and user guides at all-guides.com
Cooling
Dehumidifying
tart
top
tart / stop switch
Operation lamp
tart / stop switch
Reserve switch
Cancel switch
Operation lamp
Timer lamp
Remote controller timer mark " "
Timer memory
(Off-timer during stop)
tart / stop switch
Reserve switch
Cancel switch
Operation lamp
Timer lamp
Remote controller timer mark " "
Timer memory
(Change in reserved time)
et to "Ultra-Lo", "Lo", "Med", "Hi", "Ultra-Hi" or "stop" depending on the room
temperature, time and heat exchange temperature. et to "stop" if the room
temperature is 18¡C in the "Ultra-Lo" mode other than during preheating
Room temperature
(cooling is recovered at 18.33¡C).
On
On
Off
3'
(Compressor stopped
forcibly for 3 minutes)
et to "Ultra-Lo", "Lo", "Med", "Hi", "Ultra-Hi" or " top" depending on the room
temperature and time.
et to " top" if the room temperature is 18¡C in the "Ultra-Lo" mode other
than during preheating (cooling is recovered at 18.33¡C).
et to "Ultra-Hi" when the compressor is running at maximum speed during
hot dash or when recovered from defrosting.
et to "Ultra-Lo", "Lo", "Med" or " top" depending on the room temperature and time.
et to " top" if the room temperature is 18¡C in the "Ultra-Lo" mode other than during
preheating (cooling is recovered at 18.33¡C).
et to "Lo" in modes other than
et to "Ultra-Lo", "Lo", or " top" depending on
when the compressor stops.
the room temperature and time.
et to " top" if the room temperature is 18¡C
in the "Ultra-Lo" mode other than during
preheating (cooling is recovered at 18.33¡C).
The fan speed is controlled by the heat
exchanger temperature; the overload control is
executed as in the following diagram:
ee page 211.
ee page 215.
ame as at left.
ame as at left.
ee page 211.
ee page 218.
During automatic operation:
When heating operation is automatically selected for the first indoor unit, the next indoor unit
One unit
Other unit
will then start to heat. Also, if cooling or dehumidifying is automatically selected for the first
Cooling
indoor unit, the next indoor unit will also start to cool or dehumidify.
Heating
Dehumidifying
Circulating (fan)
Heating
tart
top
(Change in reserved time)
(Off-timer during operation)
When the compressor is running at maximum speed
during hot dash or when recovered from defrosting.
¡C
In modes other
42.32
than left
37.66
34.66
32.66
Heat exchanger
29.66
temperature
24.66
Hi or ultra-Hi
(fan speed set
to "auto")
Med
Lo
Heat exchanger temperature
KAFON
KAFOF
On
On
Off
"Med" with overload
"Lo"
Auto
The special auto mode is based on auto, but the
Operation mode
Judgment based on the room temperature and external
following is different:
temperature:
Operation mode Mode change during operation
Cooling: external temperature
25¡C, or 21¡C
external
temperature
25¡C and room temperature > 27¡C
auto
Heating: external temperature
18¡C, or 18¡C
external
temperature
21¡C and room temperature
23¡C
pecial auto
Dehumidifying: 21¡C
external temperature
25¡C and room
temperature
27¡C, or 18¡C
external temperature
21¡C
and room temperature
23¡C
et to the mode of the indoor unit that has previously been
The special auto operation mode is entered when
operating.
operation is started in the following status:
If, when one indoor unit is heating, the other unit is set to auto,
the other unit will also enter the heating operation.
< tart condition>
If, when one indoor unit is cooling or dehumidifying, the other
Power is supplied while the tele-control signal is
unit is set to auto, the other unit will enter the cooling or
being input. (Operation starts automatically.)
dehumidifying operation.
32
<End condition>
31
The remote control restores the normal operation
30
Cooling
mode.
29
28
27
26
Dehumidifying
25
24
23
22
21
20
Heating
19
18
17
16
14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
External temperature (
¡C
)
Operation mode stays uncharged even if the room or ambient
temperature changes during operation.
et room temperature
All the following temperatures can be compensated for
3¡C
±
using the remote control:
Cooling: 27¡C
Heating: 23¡C
Dehumidifying: Current room temperature (upper limit: 27¡C,
lower limit: 23¡C)
Operates at a target of set temperature minus 2
.
ame as at left.
Performs the sleep operation of each operation mode.
Notes:
1. Refer to the PWRITE-ZU data for the constants expressed by capital alphabet letters in the drawing.
2. The speed set of rotaion for the fan motor in each operation mode are as shown in Table 1.
3. The set room temperatures in the diagram include the shift values in Table 2.
Judging the operation mode from the
external temperature and room temperature
at the start.
The operation mode will be judged the
same as at operation start every hour.
- 187 -

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