14
AH-S22AW2
AH-S25AW2
FUNCTIONS
The initial frequency is determined as shown in
the tables below based on the difference between
the temperature adjustment setting at the
beginning of operation and the room temperature.
After operation begins, normal control is
performed and therefore the correspondences in
the tables below will not hold.
c. Temperature adjustment
(1) Cooling
If the room temperature is in the c zone when
operation begins,proportional/integral control is
not performed,
and the machine runs at
frequency code 9 power until the h zone is
reached. When the h zone is reached, the
frequency changes to the frequency code
determined by fuzzy calculation, and after
thatproportional/integral control is performed.
(2) Dry
After operation begins, 2 minutes (running at the h
zone) of the room temperature is stored in
memory, and that becomes the set value.
(3) Circulation
The frequency code 0 is sent to the outdoor
machine, and only the fan of the indoor machine
runs, the compressor does not run.
1-2 Indoor fan control
(1)Control for indoor freezing prevention
If the temperature of the indoor heat exchanger
stays below approximately 0
°
C for four minutes
during cooling or dry, this control stops the
compressor. Over 2˚C the compressor will run
again.
(2) Indoor fan and operating frequency
The indoor fan has 12 speeds, and changing is
done in four stages, "Auto", "High", "Med", and
"Low". The relations between the indoor fan
speed, air quantity setting, operating frequency,
and indoor heat exchanger are shown in the
following charts.
1. INDOOR UNIT
1-1 Temperature Adjustment
a. Normal control
Proportional control (P control)
When the temperature zone changes, this control
changes the frequency by one rank to move
closer to the set value.
Integral control (I control)
When the temperature zone has set time in the
same zone, this control changes the frequency by
one rank to move closer to the set value.
(Excluding the h zone.)
b. Initial control
Cooling
Room
temp.
zone
Frequ-
ency
code
c
9
d
8
e
7
f
5
g
3
h
2
i
1
j
OFF
Dry
Room
temp.
zone
Frequ-
ency
code
e
4
f
3
g
2
h
1
i
OFF
The temperature adjustment range is changed by
changing the operating mode with the operation
switch.
OFF
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
OFF
Fan speed
Frequency cord
Fan speed : High / Med / Low
High
Med
Low
OFF
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
OFF
Fan speed
Frequency cord
Fan speed : Automatic
COOLING
c
d
e
f
g
h
i
j
+1.33
+1.00
-0.33
-0.66
SET VALUE
+0.66
Cooling
+0.33
e
f
g
h
i
+1.33
+1.00
-1.00
+0.33
MEMORY SET VALUE
Dry
