DOWNLOAD Sharp AY-AP24 (serv.man12) Service Manual ↓ Size: 7.97 MB | Pages: 44 in PDF or view online for FREE

21

The room is not cooled at all
or not cooled.
The compressor does not operate.

Measure resistances of TH1 and TH2.

The control circuit is normal.
   The compressor may be defective.
   The running capacitor may be defective.
   Refrigerant may be leaked.
   The outdoor fan motor may be defective.
   The outdoor fan motor capacitor may be defective.

Push the button "AUX." on 
the  indoor unit, for more than 5 sec.

Is the

voltage between

terminal of black lead

wire on the relay in the out door

unit and terminal "N"on the

terminal board the power 

supply voltage ?

Are the resistances

conformed Fig. 1 ?

Replace the thermistor ass'y with a new one.

NO

YES

YES

YES

NO

NO

Replace the PWB ass'y with a new one.

Replace the relay in the outdoor unit 
with a new one.

Using a tester, measure voltage at
the terminals on the terminal board.

Is the voltage

between terminal "N" and

"4" in the outdoor unit the power 

supply voltage ?

22

The room is not heated at all or not heated.
The compressor does not operate.

The control circuit board is normal.
   Refrigerant may be leaked.
   The running capacitor may be defective.
   The outdoor fan motor may be defective.
   The outdoor fan motor capacitor may be defective.
   The compressor may be defective.
   The thermistor may be defective.

   
   
   
   

Is the voltage

between terminal "N" and

"4"("1" ..... AY-AP18CS) of the 

terminal board the power 

supply voltage ?

NO

Replace the PWB ass'y with a new one.

Push the button of "AUX" on the  indoor 
unit, for more than 5 sec.

Using a tester, measure voltages at the 
terminals on the terminal board.

Select HEAT MODE with remote controller.
And then start operation.

Is the voltage

between terminal "N" and

"2" of the terminal board the

power supply voltage ?

Is the voltage

between terminal "N" and

"3" of the terminal board the

power supply voltage ?

YES

YES

YES

NO

NO

23

s

1

4

C

2

Capillary 
tube A

Capillary 
tube B

Capillary 
tube D
(Lower row)

Capillary 
tube C
(Upper row)

Accumulator

3

Strainer

Heating

Cooling

Outdoor unit

Condenser

Evaporator

Indoor unit

Reverse valve

Comp-

ressor

Flare coupling

Flare coupling

3-way

valve

2-way

valve

Silencer

Coil

Sub
Accumula
-tor

s

1

4

C

2

Capillary 
tube A

Capillary 
tube B

Capillary 
tube C
(2 pieces)

Accumulator

3

Strainer

Heating

Cooling

Outdoor unit

Condenser

Evaporator

Indoor unit

Reverse valve

Comp-

ressor

Flare coupling

Flare coupling

3-way

valve

2-way

valve

Silencer

Coil

24

O.D.

I.D.

L

Capillary tube A

ø 3.2

ø 2.0

500

Capillary tube C

(Upper  row)

  

ø 2.7

ø 1.6

150

Capillary tube D

(Lower  row)

  

ø 2.7

ø 1.6

244

O.D.

I.D.

L

Capillary tube A

ø 3.5

ø 2.4

600

Capillary tube B

ø 3.5

ø 2.4

400

Capillary tube C

(2 pieces)

ø 3.6

ø 1.8

100

For AY-AP18CS

For AY-AP24CS

Indoor side

Outdoor side

Temperature (˚C)

Temperature (˚C)

Relative humididity (%)

Relative humididity (%)

29

39

46

15

Cooling

21

-

7

87

Heating

Cooling

Heating

NO. Condition

Model

AY-AP18CS

1

2

3

4

Service port pressure

100˚C

81C

56˚C

2˚C

15˚C

41˚C

4˚C

0.51MPa

1.73MPa

Cooling

Heating

AY-AP24CS

97˚C

88˚C

54˚C

31˚C

14˚C

45˚C

4˚C

-2˚C

-3˚C

0.51MPa

1.80MPa

Based on 'SASO 385 / 1983'
(at 220V refrigerant pipes length 7.5m)