Hitachi RAC-25FPA, Service Manual

Page: 36 / 117

Start
Stop
Start
Stop
Start / stop switch Operation lamp Start / stop switch Reserve switch Cancel switch Operation lamp Timer lamp Timer memory
(Of
f-timer during stop)
(Change in reserved time)
Start / stop switch Reserve switch Cancel switch Operation lamp Timer lamp Timer memory
(On-timer during operation)
(Change in reserved time)
BASIC MODE
MODEL
RAF-25RP
A, RAF-35RP
A
Operation mode
Basic operation of start / stop switch
g
n
i
t
a
e
H
g
n
i
y
f
id
i
m
u
h
e
D
g
n
i
l
o
o
C
n
a
F
Auto
Of
f-timer
On-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) Leave home
Changes from "Hi" to "Med" or "Lo" depending on room temperature. 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 40.
See page 38.
Same as at left. See page 40.
Same as at left. See page 42 See page 44.
Same as at left. Performs the sleep operation of each operation mode.
See page 40.
Set to "Silent", "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 "Silent" 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 "Silent", "Lo", "Med" or "Stop" depending on the room temperature and time. Set to "Stop" if the room temperature is 18
℃
in the "Silent" mode other than during
preheating (cooling is recovered at 18.33
℃
).
See page 42.
Notes: 1.
The speed set of rotaion for the fan motor in each operation mode are as shown in
Table 1.
2.
The set room temperatures in the diagram include the shift values in
Table 2.
Set
to
"Silent",
"Lo",
or
"Stop"
depending
on
the
room temperature and time. Set
to
"Stop"
if
the
room
temperature
is
18
℃
in the "Silent" 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
Set
to
"
Sil
en
t"
, "L
o",
"
M
ed
",
"
H
i",
"
ult
ra-
H
i"
or
"s
to
p"
depe
nding
on
th
e ro
om
te
mper
at
ur
e,
tim
e a
nd
he
at
exc
ha
ng
e
te
m
pe
ra
tu
re.
S
et
to
"s
to
p"
if t
he
ro
om
te
m
pe
rat
ur
e
is 1
8˚
C in
th
e
"Sil
en
t"
mo
de
o
th
er
th
an
d
ur
in
g
pre
heat
in
g
(c
oo
lin
g
is
re
cov
ere
d
at
1
8.
33
˚C
).
1. Runs at "Hi" until first thermo of
f after operation
is started. 2. Runs at "Lo" when thermo is of
f.
W
he
n
th
e
com
pr
ess
or
is
r
un
nin
g
at
max
im
um
sp
ee
d
du
rin
g
ho
t d
as
h
or
w
he
n
re
co
ve
re
d
fro
m
d
efr
os
tin
g.
In
m
od
es
o
th
er
th
an
le
ft.
Room temperature
Temperature set for cooling
Thermo judgment
On
Of
f
On
Hi Med
Compressor
3’
Lo Silent
forcibly for 3 minutes)
(Compressor stopped
24.0 20.0 19.0
High or ultra-High (Fan speed set to “AUTO”)
Heat
exchanger temperature
Med Low Silent
37 32 29
26.0
27.0 22.0 19.0 33.0
31 26 27
36
Operating mode is judged by room tempertature. (1) 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 the previous auto mode operation.
·
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
·
[ Cooling ] : Room temperature
≧
Remote controller setting
·
[ Heating ] : Room temperature
＜
Remote controller setting
(2) Judging operating mode change during operation (Continuous judgment). (a) Conditions for judgment
·
The mode is reviewed at interval time.
＊
Interval time as below
·
The first interval time : 30 minutes
·
The second interval time : 50 minutes
·
On and after the third interval time : 55 minutes
(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 sum of basic preset
temperature and each type of shift value. (e.g. preset temperature correction value, powerful shift value, eco shift value, eco sleep shift value, etc.) [ Currently cooling ]
·
Room temperature
≦
·
Room temperature
＞
[ Currently heating ]
·
Room temperature
≧
·
Room temperature
＜
Cooling Heating
Heating
Cooling
final preset temperature
[ Room temperature setting of remote controller ]
+3 +3
-2
-2 -2
+3