AE-XM24CR (serv.man8). Functions - Sharp Air Conditioner Service Manual (repair manual)

ae-xm24cr (serv.man8) service manual
Model
AE-XM24CR (serv.man8)
Pages
10
Size
608.16 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / Functions
File
ae-xm24cr-sm8.pdf
Date

Read Sharp AE-XM24CR (serv.man8) Service Manual online

31
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
FUNCTIONS
1. INDOOR UNIT
1-1 Temperature Adjustment
(1) Cooling
When the room temperature is higher than the preset
temperature by 2˚Cor more, the unit runs at the
maximum operation frequency until the temperature
comes down to the preset temperature.
When reaching the preset temperature, the unit runs
at the frequency calculated by the fuzzy operation and
switches to the normal control.
(2) Heating
When the room temperature is lower than the preset
temperature by 3.5˚C or more, the unit runs at the
maximum operation frequency until the temperature
comes down to the preset temperature.
When reaching the preset temperature, the unit runs
at the frequency calculated by the fuzzy operation and
switches to the normal control.
(3) Dry
After operation begins, 2 minutes of the room
temperature is stored in memory, and that becomes
the set value.
1-2 Indoor fan control
(1) Cooling
The fan speed can be selected from "Auto", "Soft",
"Low",and "HIgh".When "Soft", "Low" or "HIgh" is
selected, the fanspeed is constant regardless of
the room temperature.When "Auto" is selected,
the fan speed automatically changes between
"Soft" and "HIgh" depending on the difference
between the room and preset temperature.
Control for indoor freezing prevention
If the temperature of the indoor heat exchanger
stays below approximately 1˚C for four minutes
during cooling or dry, this control stops the
compressor. Over 3˚C the compressor will run
again.
(2) Heating
Control for cold air blowing prevention
When heating begins, this control stops the indoor
fan until the temperature of the indoor heat
exchanger reaches 23˚C. It also stops the fan if
the temperature goes below 21˚C during
operation.
1-4 Automatic operation
The operating mode and temperature setting are
determined by the room temperature and the external
air temperature.
1-3 Hot keep
If the room temperature is setting temp. during
heating, the compressor is turned on and off to
prevent overheating, when the operating unit is single.
When two units are operating, the expansion
valve will OPEN and CLOSE to replace the
compressor ON/OFF function.
The indoor fan stops.
Temperature of the indoor heat exchanger
Preset Fan speed
The indoor fan operates at low speed.
35˚C
23˚C
32˚C
21˚C
Heating
(24˚C)
Heating
(23˚C)
Heating
(22˚C)
Cooling
(24˚C)
(Room temperature 
- 2
°C)
Cooling
(25˚C)
Cooling
(26˚C)
Dry
Room 
temperature
(˚C)
26
0
10
18
28
34
External air 
temperature (
°C)
Cooling
Heating
Set temperature
By fuzzy computing
Set the shift up time
Cooling setting + 1
°C
Heating setting - 3
°C
Final
Dry
Same as above 
(Final setting + 1
°C)
3
°C
Room 
temperature
Timer set time
1
hour
Timer operation starts
Stops
1
°C
Stops
Timer set time
1
hour
Timer operation starts
Room 
temperature
1-5 ON-timer
The ON-timer is set by pressing the ON-timer button.
In order to attain the set temperature at the set time,
the operation starting time is corrected by neuro and
fuzzy computing one hour before the set time.
1-6 OFF-timer
The OFF-timer is set by pressing the OFF-timer
button. Operation is as follows:
*During Heating
*During Cooling / Dry
32
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
1-7 Swing louvre
The louvre is moved by a stepping motor to perform
swing and fixing in the set position.
If the "FLOW DIRECTION" button is prossed during
swing, it will stop. If the "FLOW DIRECTION" button is
pressed while it is stopped, it will swing.
The vertical adjustment louvre will change its angle
continuously.
Press the SWING button again when the vertical
adjustment louvre is at the desired position.
• The louvre will stop moving within the range shown
in the diagram.
• The adjusted position will be memorized and will be
automatically set to the same position when
operated the next time.
• When the mode of the indoor unit(s) later operated
is/ are different from those which is/are in
operation, 4 seconds later, a long BEEP will be
emitted and the temperature indicator on the
indicator panel will indicateÅh Åg and the
OPERATION lamp and TIMER lamp will blink
alternately.
This shows that the later operated unit(s) is/are not
working. In such case, change the remote
controlÅfs mode and send the same mode signal
which the other indoor unit(s) is/are operating in.
The BEEP will be emitted twice from the indoor
unit(s) later operated, and the unit(s) will operate.
How to rest the Blinking lamp:
Change the remote control's mode and send same
mode signal whitch the other indoor unit is operating in.
The BEEP will be emitted twice from the indoor unit later
operated, and the unit will operate.2.
2. DESCRIPTION OF ODOR SENSOR
(Only for models AY-XPM7CR/XPM9CR/XPM12CR)
(1) Outline of the odor sensor
The odor sensor is used to display the clean sign
during operation.
This odor sensor sensitively reacts to the various
air contaminations such as a volatile organic
solvent, fragrant materials, cigarette smoke, and
cigarette burning gas.
In the figure on the right, RS indicates a sensor
resistance, RL a load resistance, VRS a sensor
output voltage, and VC a sensor power supply
voltage. Their relation is expressed in the following
formula.
1-8 One-hour operation
If this button is pressed when operation is stopped,
operation will begin and then stop after 1 hour.
If pressed when it is operating, will stop after one hour.
1-9 Full power operation
Immediately begins cooling or heating at maximum
power and air flow.
(During heating)
Operates at setting of 32 ˚C.
(During cooling)
Operates at setting of 18 ˚C.
1-10 Power ON start
If a jumper wire is inserted into the place indicated
JP99 on the indoor control board, and the power
plug is inserted. cooling or heating will be
automatically determined by the room temperature
sensor on the main unit, and operation will begin.
1-11 Auto Restart
When power failure occures, after power is
recovered, the unit will automatically restart in the
same setting which were active before the power
failure.
1-12 Occupied mode
When the setting mode of one indoor unit differs
from the other, the indoor unit operated later may not
work.
• When one indoor unit is operating in HEAT mode,
the other unit can not operatre in COOL or DRY
mode.
• When one indoor unit is operating in COOL or DRY
mode, the other unit can not operate in HEAT
mode.
512(
µs)
12.8(ms)
Basic circuit
Microcomputer 
output
Microcomputer 
input
Odor sensor
3
1
2
R
RL
C31
R41
R65
R64
R52
C32
Q7
Q8
R66
5V
S
V
RS
V
C
V
RS = 
C
R
V
R
L +  
R
When the air contamination level increases, the value
of the sensor resistance RS drops, which also lowers
the value of the sensor output voltage.
While detecting contamination, the microcomputer
outputs the following pulse to the transistor Q8, which
drives the heater with the built-in odor sensor using
the pulse.
COOL and DRY modes
HEAT  mode
The adjustment range
is narrower the SWING
range in order to pre-
vent condensation from
dripping.
The range is wide so the
air flow  can be directed
toward the floor.
Adjustment range
33
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
What to Odor Sensor react to ?
Odor Sensor reacts to tobacco smole, motor exhaust,
odor emitted from animals, etc.
Allergen sensor an Odor Sensor also may react to
vapour of insecticides, cosmetics, alcohol, hemicals
and the like, and to extreme change of temperature /
humidity.
(2) Detection of the air contamination by the fluctuation ratio of sensor resistance
The output voltage from the odor sensor is input into the indoor unitÅfs microcomputer to detect the air
contamination.
This method detects the air contamination by converting sensor output voltage into the sensor resistance value
and calculating its fluctuation ratio per unit of time. Therefore, the sensor determines that the air is contaminated
when the sensor resistance value drops abruptly.
(3) Operation of the indoor unitÅfs microcomputer
When the air conditioner is plugged in, the indoor unitÅfs microcomputer starts operating and, after 1 minute,
starts detecting the air contamination.
(4) Switching sensitivity of the odor sensor
The sensitivity of the odor sensor can be adjusted when the sensor is too responsive or unresponsive.
It is set as standard at the factory.
Sensitivity is divided into three levels: high, standard, and low.
The contamination is detected when the sensor resistance drops below following percentages compared to the
reference value in a clean state.
(This is equal to the description of the resistance of the allergen sensor.)
3. DESCRIPTION OF THE OPTIAL ALLERGEN SENSOR
(1) Outline of the optical allergen sensor
As with the odor sensor, this sensor is used to display the clean sign during the operation. The pulse signal is output
from the microcomputer into the basic circuit show in the figure below, and the sensor signal is input into the
microcomputer according to the size or amount of the dust.
Output
Output
R39
1
2
3
4
5
6
12V
C29
C30
Q6
R38
R40
R72
Input
Input
50Hz : 20.0 ms
60Hz : 16.6 ms
Basic circuit
Allergen 
sensor
Clean
Contaminated
Reference value (R0)
Smoking start
Determined value K
New reference value (R0)
Additional operation
1 min.
Time
Determined 
clean
Determined 
contaminated
High (85%)
Standard (80%)
Low (75%)
15k
15k
13k
13k
R7
R6
P.W.B.
34
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
(2) Dust detection by using the sensor
The output voltage from the optical allergen sensor is input into the indoor unitÅfs microcomputer to detect the air
contamination (dust). This method inputs the sensor voltage per unit of time and calculates the relative fluctuation
to determine whether the air is contaminated or not.
(3) Operation of the indoor unit's microcomputer
As with the odor sensor, the indoor unitÅfs microcomputer starts constantly detecting the air contamination level
after 1 minute of the operation start.
(4) Switching sensitivity of the optical allergen sensor
The sensitivity can be adjusted. However, both sensors will be adjusted to the same level. The air contamination is
detected in the following seconds at each sensor level.
Clean
Contaminated
Determined 
clean
Determined 
contaminated
Reference 
value
High (2 sec.)
Med (3 sec.)
Low (4 sec.)
15k
15k
13k
13k
R7
R6
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Here you can read online and download Sharp AE-XM24CR (serv.man8) Service Manual in PDF. AE-XM24CR (serv.man8) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp AE-XM24CR (serv.man8) Air Conditioner. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.