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Model
AY-AP18 (serv.man7)
Pages
7
Size
465.22 KB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / Functions
File
ay-ap18-sm7.pdf
Date

Sharp AY-AP18 (serv.man7) Service Manual ▷ View online

11
AY-AP18CS
AY-AP24CS
AE-A18CS
AE-A24CS
FUNCTIONS
1.
Temperature control characteristic
1-1
COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by five thermostat lines (C1 thru C5).
Figure Y-1
1-2
DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru D3).
Figure Y-2
1-3
HEAT operation
In the “HEAT” mode, the thermostat circuit is
controlled by six thermostat lines (H01 thru H4).
Figure Y-3
2.
Operation modes
2-1
COOL operation
The compressor turns on or off, at the thermostat
lines C3 and C4. The outdoor fan motor is also
controlled with the compressor.
18
32
C1
C2
C3
C4
17.5
18.5
19.5
19.0
20.5
31.5
33.0
32.5
33.5
34.5
Preset temperature (˚C)
Room temperature (˚C)
C5
Room temperature(˚C)
Preset temperature (˚C)
18
32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Preset temperature (˚C)
H4
H3
H2
H1
H02
H01
17.5
18.5
20
21
22
23
31.5
32.5
34.0
35.0
36.0
37.0
18
32
Room temperature(˚C)
Room temperature
Preset temperature
Room 
temperature
transition
C4
C5
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
3
Figure Y-4
AY-AP18CS
AY-AP24CS
AE-A18CS
AE-A24CS
12
2-2
DRY operation
On the switch on, the compressor always starts to
operate for 2 minutes with fan speed "DL" .
The microcomputer reads the room temperature 2
minutes after this first compressor operation.
This room temperature is set as the preset
temperature automatically.
The preset temperature ranges from 18˚C to
32˚C. When the room temperature is below 18˚C,
the preset temperature is  set to 18˚C, and when
the room temperature is over 32˚C, the preset
temperature is set to 32˚C.
Dry operation is divided into three zones (Cooling
zone, Dehumidifying zone and Circulating zone)
by thermostat lines (D1 to D3), and the
compressor and the fan motor are controlled in
each zone as shown in Table Y-1.
Table Y-1
2-3
Heat operation
The compressor turns on or off, at State  2  , turns on
continuously at State  1  &  3 .
Figure Y-5
Room temperature
Preset temperature
Room 
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
Compressor
Cooling zone
Dehumidifying zone
Circulating zone
Fan speed
ON
"DH"
"DL"
"DL" or OFF
ON
OFF
Figure Y-6
Room temperature
Preset temperature
Room
temperature
transition
States 1 & 3 : Compressor ON
States 2  : Compressor OFF/(ON)
                  (Hot-keep function)
H1
H2
3
1
2
3.
Fan speed
Fan speeds are given by the indoor fan motor, "DL"~"HH" which are available in the following operation mode.
Table Y-2
Fan switch
DL
Fan speed
Fan switch (AUTO)
AY-AP18CS
(r.p.m.)
750
830
780
860
820
960
840
980
940
1030
1000
1120
1050
1210
720
730
840
930
870
960
940
1080
1010
1150
1050
1210
AY-AP24CS
DH
DRY
COOL
CL
COOL SOFT
CAL
CM
COOL LOW
CAH
CH
COOL HIGH
HUL
HL
HEAT SOFT
HEAT
HAL
HM
HEAT LOW
HAH
HH
HEAT HIGH
13
AY-AP18CS
AY-AP24CS
AE-A18CS
AE-A24CS
4.
Hot-Keep
This function automatically controls the on-off
operation of the indoor fan motor in accordance
during the heating operation, thereby preventing
the air conditioner from delivering a cold air when
the compressor is off.
When the room temperature exceeds the
thermostat line “H1”, the compressor is turned off,
and the indoor fan motor is turned off after
rotating at “HUL” for 30 seconds. 3 minutes and
10 seconds after turning off the compressor, the
indoor fan motor is turned on for 3 minutes and 20
seconds. At 10 seconds after turning on the
compressor, the indoor fan motor is turned  on.
The next compressor OFF time is for 3, 8 or more
than 8 minutes according to the room temperature
(the time increases with a rise of room
temperature) when 3 minutes elapse after turning
on the compessor.
Figure Y-7
5.
Preheat air flow
This function is intended to prevent cold air from
being discharged when the heating operation
starts or when defrosting.
When the indoor pipe temperature is below 29˚C
at the begining of the heat operation or after
defrosting, the indoor fan motor stays.
When the indoor pipe temperature gets higher
than 29˚C, the fan motor is turned on at speed
“HUL” after compensation of starting.
When the indoor pipe temperature exceeds 35˚C,
the specified fan speed is restored. When the
indoor pipe temperature falls below 30˚C, the fan
speed shifts down to "HUL". And, when the indoor
pipe temperature falls below 23˚C, the fan motor
turns off. Then, over 29˚C , it turns on again at
speed “HUL”.
Compressor
ON
OFF
Indoor
fan motor
30sec.
time
HUL
ON
OFF
3 min.
3 min.
10sec.
HUL
30sec.
10sec.
Thermo off
Pipe temperature(˚C) 
24
29
30
35
OFF
UL
UL
UL
OFF
Preset
Fan speed
OFF
ON
U1
U2
U1  and  U2  are  defferent  by  the  time.
 1   within  3  minutes
 3   over  3  minutes
Figure Y-8
6.
Overheating protection system
When overloading occurs during the heating operation,
this system controls the outdoor fan motor according to
the indoor pipe temperature to prevent the overloading
of the compressor and restrain the rise in high pressure.
When the indoor pipe temperature exceeds U1˚C, the
outdoor fan motor is turned off, and when the indoor
pipe temperature falls U2˚C, the outdoor fan motor turns
on.
Figure Y-9
Table Y-3
Fan
Line
U1
U2
U1
U2
HH
HAH
HM
1
2
1
2
1
2
54˚C
54˚C
54˚C
54˚C
53˚C
53˚C
52˚C
53˚C
52˚C
53˚C
51˚C
52˚C
54˚C
54˚C
54˚C
54˚C
53˚C
53˚C
52˚C
53˚C
52˚C
53˚C
51˚C
52˚C
Fan
Line
U1
U2
U1
U2
HAL
HL
HUL
1
2
1
2
1
2
52˚C
52˚C
52˚C
52˚C
52˚C
52˚C
50˚C
51˚C
50˚C
51˚C
50˚C
51˚C
52˚C
52˚C
52˚C
52˚C
52˚C
52˚C
50˚C
51˚C
50˚C
51˚C
50˚C
51˚C
AY-AP24CS
AY-AP18CS
AY-AP24CS
MODELS
MODELS
AY-AP18CS
AY-AP18CS
AY-AP24CS
AE-A18CS
AE-A24CS
14
Switch ON
Heating
Heating
Heating
Min. 
40min.
Max.
12min.
Min.
30min.
Max.
12min.
Defrost
Defrost
7.
Current control
This system, in order to prevent overcurrent
during heating operation, controls the outdoor fan
motor and changes the indoor fan motor speed by
detecting total current.  When the current exceeds
P2, the outdoor fan motor is automatically turned
off, and when the current falls below P4, the
outdoor fan motor is turned on.
When the current exceeds P3 and the indoor fan
speed shifts down because of cold air (5. Preheat
air flow), the changes in the indoor fan speed
shifts up as follows, from "off" to "HUL", or from
"HUL" to "HL". And when the current falls bellow
P5, the indoor fan speed shift up is canceled.
Figure Y-10
8.
Freeze preventive
When the indoor pipe temperature falls below 0˚C
during cool operation or dry operation, the
compressor is turned off.
9.
Defrost
The defrost timer (integrating the operation time of
compressor) counts time with microcomputer
during heat operation.
Frost of outdoor pipe is estimated by indoor pipe
temperature (TH2), room temperature (TH1),
indoor fan speed and operation state of
compressor.
In the defrost operation, first the compressor is
turned off, the fan speed is set to “HUL” and the
outdoor fan motor is turned off.
30 seconds later the indoor fan motor is turned
off, 60 seconds later the reverse valve is turned
off, and the compressor is turned on. In the end of
defrosting, the compressor is turned off, the
outdoor fan motor is turned on, 60 seconds later
the reverse valve is turned on, and the
compressor is turned on, starting heat operation.
At this time, the indoor fan motor is turned off or
the fan speed is set to “HUL” if preheat air flow
function is effective.
Figure Y-11
Figure Y-12
10.
Delayed operation of the reverse valve
the heat operation is shut down or the operating
mode is switched from heat to cool or dry, or vice
versa, the reverse valve is switched after 3
minutes.
11.
Test run
If the "AUX" button on the unit is pressed for 5
seconds or more during operation, cool test
operation starts. The operation LED (red) flickers
during test run.
To put the system in the heating test run mode,
start the cooling operation and select the heating
mode on the remote control. In cool and  heat
mode continuous compressor on operation is
performed. In dry mode the operation is in
dehumidifying zone. In fan only mode the indoor
fan motor runs continusly.
12.
Timer
12-1 ON/OFF TIMER
When the unit operates during one hour after the
OFF-time is set, thermostat setting is
automatically shifted (+1˚C in cool operation and
dry operation, -3˚C in heat operation, 16˚C -
32˚C). When the ON-timer is set in heat operation
and cool operation, operation starts before 0 to 30
minutes(depends on the room temperature) so
that preset temperature is obtaind at set time.
12-2 ONE-HOUR TIMER
When ONE-HOUR timer is set, the unit turns off
automatically after one hour. The one hour timer
operation has priority over other time operation,
such as the TIMER ON and TIMER OFF. If the
ONE-HOUR TIMER button is pressed again
during operation, the unit will operate additionally
for another one hour.
Defrost start
Compressor
Reverse
Valve
Outdoor
Fan Motor
Indoor
Fan Motor
Preheat Air
Flow Control
30sec.
MAX. 7min.
60sec.
60sec.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
60sec.
HUL
Outdoor
Fan motor 
OFF
Indoor
Fan motor
Shift UP
Compressor
OFF
Time
Input current
Current transition
P1     19.0A       22.8A     
P2     13.5A       18.1A     
P3     12.8A       16.9A     
P4     12.4A       16.8A     
P5     12.0A       16.0A     
AY-AP18CS AY-AP24CS
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  • Here you can View online or download the Service Manual for the Sharp AY-AP18 (serv.man7) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp AY-AP18 (serv.man7) Air Conditioner. Information contained in Sharp AY-AP18 (serv.man7) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.