Hitachi RAC-08PH1, Service Manual, Page: 27 / 114

Start
Stop
Start
Stop
Start / stop switch Operation lamp Start / stop switch Reserve switch Cancel switch Operation lamp T
imer lamp
T
imer memory
(Of
f-timer during stop)
(Change in reserved time)
Start / stop switch Start / stop button Reserve switch Reserve button Cancel switch Cancel button Operation lamp Operation lamp T
imer lamp
T
imer lamp
T
imer memory
T
imer memory
OFF
OFF
OFF
OFF
ON
ON
ON
ON
(On-timer during operation)
(Change in reserved time)
(Of
f -> On timer)
(Of
f -> On timer)
(On -> Of
f timer)
(On -> Of
f timer)
during operation
during stop
BASIC MODE
MODEL
RAS-08PH1,RAS-10PH1,RAS-14PH1
Operation mode
Basic operation of start / stop switch
Fan
Cooling
Dehumidifying
Heating
Auto
Of
f-timer
On-timer Of
f On
On Of
f timer
Timer functions Fan speed mode (indoor fan)
Auto
Operates at "Hi" regardless of the room temperature. Operates at "Lo" regardless of the room temperature. Operates at "Silent" regardless of the room temperature. Performs only fan operation at the set speed regardless of the room temperature. Enters sleep operation after set as on the left. Action during sleep operation silent (sleep) operation. Operates at "Med" regardless of the room temperature.
Hi Med Lo Silent
Basic operation of temperature controller Sleep operation (with sleep button ON)
Changes from "Hi" to "Med" or "Lo" depending on room temperature. 1. Runs at "Hi" until first thermo of
f after operation
is started. 2. Runs at "Lo" when thermo is of
f.
Set to "Ultra-Hi" when the compressor runs at maximum speed, and to "Hi" in other modes. Same as at left. Same as at left. Same as at left.
Set to "Lo" in modes other than when the compressor stops. Set to "Silent" in modes other than when the compressor stops.
･
Same as at left.
･
See page 32.
See page 31.
･
Same as at left.
･
See page 33.
･
Same as at left.
･
See page 35.
･
Same as at left.
･
Performs the sleep operation of each operation mode.
See page 33.
Set to "Ultra-Lo", "Lo", "Med", "Hi", "Ultra-Hi" or "Stop" depending on the room temperature and time. Set to "Stop" if the room temperature is 18
℃
in the "Ultra-Lo" mode other
than during preheating (cooling is recovered at 18.33
℃
).
Set to "Ultra-Hi" when the compressor is running at maximum speed during hot dash or when recovered from defrosting. Set to "Ultra-Lo", "Lo", "Med" or "Stop" depending on the room temperature and time. Set to "Stop" if the room temperature is 18
℃
in the "Ultra-Lo" mode other than during
preheating (cooling is recovered at 18.33
℃
).
See page 34.
Notes: 1.
The speed set of rotaion for the fan motor in each operation mode are as shown in
T
able 1.
2.
The set room temperatures in the diagram include the shift values in
T
able 2.
Room temperature
1 ℃
0.66 ℃
1.33 ℃
Temperature set Thermo judgment for cooling Compressor
Hi Med Lo
On
On
Of
f
3'
(Compressor stopped forcibly for 3 minutes)
Start / stop swith Operation lamp
Fan
speeds
Hi
Hi
Med
Med
Lo
Lo
Set to "Ultra-Lo", "Lo", or "Stop" depending on the room temperature and time. Set to "Stop" if the room temperature is 18
℃
in the "Ultra-Lo" mode other than during preheating (cooling is recovered at 18.33
℃
).
The fan speed is controlled by the heat exchanger temperature; the overload control is executed as in the following diagram:
Heat exchanger temperature
KAFON KAFOF
"Med" with overload
"Lo"
On
On
Of
f
Operating mode is judged by room temperature and outdoor temperature. (1) Judging by outdoor temperature
･
Operating mode is judged by outdoor temperature.
Only when the mode is not restricted by this judgment, the judgment by room temperature in the next paragraph will be performed. (a) Outdoor temperature
≧
27
℃
: Restricted to cooling
(b) Outdoor temperature
≦
16
℃
: Restricted to heating
(2) Judging by room temperature Operating mode at start up is judged (Initial judgment) (a) Conditions for judgment (any of the followings)
･
When auto operation is started after 1 hour has elapsed since the operation was stopped.
･
When auto operation is started after the previous manual mode operation.
･
When the operating mode is switched to auto while operating at manual mode.
(b) Judging method
･
Room temperature
≧
25
℃
3
℃
: Cooling
･
Room temperature
＜
25
℃
3
℃
: Heating
※
(
3
℃
is the fine adjustment value from the remote controller
.
Judging operating mode change during operation (Continuous judgment) (a) Conditions for judgment (any of the followings)
･
The mode is reviewed at every interval time.
･
When auto operation is started again before 1 hour has elapsed since the operation was
stopped. (b) Judging method
･
Judge by setting the hysteresis on the final preset temperature.
The final preset temperature is the actually targeted preset temperature which is the sum of
the basic preset temperature and each type of shift value (e.g. 3
℃
by remote controller
,
preset temperature correction value, powerful shift value, etc.). [Currently cooling]
･
Room temperature
≦
Final preset temperature
−
2
℃
Change to heating
･
Room temperature
＞
Final preset temperature
−
2
℃
Continue cooling
[Currently heating]
･
Room temperature
≧
Final preset temperature
＋
3
℃
Change to cooling
･
Room temperature
＜
Final preset temperature
＋
3
℃
Continue heating
Cooling Heating
16
℃
27
℃
25
℃
Outdoor temperature
Room temperature
Heating
Cooling
＋
3
℃
−
2
℃
final preset temperature
Set to
"ultra-Lo
",
"
Lo"
,
"Med"
,
"Hi"
,
"ultra-Hi"
or
"stop"
depending on the room temper
ature
,
time and heat e
xchange temper
ature
. Set to
"stop"
if the room temperature is 18˚C in th
e
"ultra-Lo"
mode other than dur
ing preheating (cooling is reco
vered at 18.33˚C).
When the compressor is r
unning at maxim
um speed
dur
ing hot dash or when reco
vered from defrosting.
In modes other than left.
TDTMPH TDTMPM TDTMPL
(TDTMPH) + (TDSFNP) + (TDSFLH) (TDTMPM) + (TDSFNP) (TDTMPL) + (TDSFNP)
˚C
Lo Med
Hi or ultra-Hi (f
an speed set
to
"auto"
)
Heat e
xchanger
temper
ature
( (
(
27