Functions - Sharp AH-MX122 Service Manual

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
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.
Cooling
+3.33
+2.66
+2.00
+1.33
+0.66
SET VALUE
Dry
+2.66
+2.00
+1.33
+0.66
MEMORY SET VALUE
-1.00
-1.33
Cooling
Room Frequency
temp. Code
zone
c 9
d 8
e e 7 7
f f 5 5
g g 3 3
h h 2 2
i i 1 1
j OFF

FUNCTIONS

c
d
e
f
g
h
i
-0.66
j
d
e
f
g
h
i
j
Dry
Room Frequency
temp. Code
zone
d 5
e 4
f 3
g 2
2
h2
1
h1
i 1
j 0
Full power
operation only
c. Temperature adjustment
The temperature adjustment range is changed by
changing the operating mode with the operation switch.
(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 i zone is reached. When the
i 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.
COOLING
13
Fan speed : High / Med / Low
11
10
9
8
7
6 Med
5
4
Low
3
2
1
OFF
OFF 1 2 3 4 5 6 7 8
Frequency cord
Fan speed : Automatic
11
10
9
8
7
6
5
4
3
2
1
OFF
OFF 1 2 3 4 5 6 7 8
Frequency cord
High
9
9