Sinclair AST-24AI User manual

SERVICE MANUAL
EN
TOWER SERIES
AST-24AI


“Originalinstructions”
IMPORTANT NOTE:
Read this manual carefully before installing
or operating your new air conditioning
unit. Make sure to save this manual for
future reference.

Service Manual
Table of Contents
Part Ⅰ: Technical Information.......................................................................... 1
1. Summary......................................................................................................................... 1
2. Specications............................................................................................................. 2
2.1 Specication Sheet.............................................................................................................. 2
2.2 Operation Characteristic Curve ........................................................................................... 4
2.3 Capacity Curve in Different Outdoor Temperature .............................................................. 4
2.4 Cooling Data Sheet in Rated Frequency............................................................................. 5
2.5 Noise Curve......................................................................................................................... 5
3. Outline Dimension Diagram........................................................................... 6
3.1 Indoor Unit........................................................................................................................... 6
3.2 Outdoor Unit ........................................................................................................................ 7
4. Refrigerant System Diagram......................................................................... 8
5. Electrical Part.............................................................................................................. 9
5.1 Wiring Diagram.................................................................................................................... 9
5.2 PCB Printed Diagram .........................................................................................................11
6. Function and Control......................................................................................... 13
6.1 Function Buttons of Air Conditioner................................................................................... 13
6.2 Remote Control Operations............................................................................................... 15
6.3 Description of Each Control Operation.............................................................................. 19
6.4 Ewpe Smart App Operation Manual
.................................................................................. 22
Part Ⅱ: Installation and Maintenance .................................................... 23
7. Notes for Installation and Maintenance............................................. 23
8. Installation................................................................................................................... 26
8.1 Installation Dimension Diagram......................................................................................... 26
8.2 Installation Parts-checking ............................................................................................... 28
8.3 Selection of Installation Location....................................................................................... 28
8.4 Requirements for electric connection ............................................................................... 28
8.5 Installation of Indoor Unit................................................................................................... 28
8.6 Installation of Outdoor Unit................................................................................................ 30
8.7 Vacuum Pumping and Leak Detection .............................................................................. 32
8.8 Check after Installation and Test Operation ...................................................................... 32

Service Manual
9.Troubleshooting...................................................................................................... 33
9.1 Judgement by Flashing LED of Indoor ............................................................................. 33
9.2 How to Check Simply the Main Part of Indoor ................................................................. 34
9.3 Judgement by Flashing LED of Outdoor .......................................................................... 39
9.4 Maintenance Method for Normal Malfunction................................................................... 45
10. Removal Procedure
......................................................................................... 47
10.1 Removal Procedure of Indoor Unit
................................................................................. 47
10.2 Removal Procedure of Outdoor Unit
.............................................................................. 54
Appendix:
.......................................................................................................................... 63
Appendix 1: Reference Sheet of Celsius and Fahrenheit
...................................................... 63
Appendix 2: Conguration of Connection Pipe
....................................................................... 63
Appendix 3: Pipe Expanding Method
..................................................................................... 64
Appendix 4: List of Resistance for Temperature Sensor
........................................................ 65
Table of Contents

Service Manual
1
Technical Information
1. Summary
Part Ⅰ: Technical Information
Indoor Unit:
Remote Controller:Outdoor Unit:
YAP1F4(WiFi)

Service Manual
2
Technical Information
2. Specications
2.1 Specication Sheet
Parameter Unit Value
Model
AST-24AI
Product Code CH156000800
Power
Supply
Rated Voltage V~ 220-240
Rated Frequency Hz 50.0
Phases 1.0
Power Supply Mode Outdoor
Cooling Capacity W 7200
Heating Capacity W 7500
Cooling Power Input W 2250
Heating Power Input W 2080
Cooling Power Current A 10.4
Heating Power Current A 9.32
Rated Input W 3800
Rated Current A 18
Air Flow Volume(SH/H/M/L/SL) m3/h 1400/1150/1050/900/-
Dehumidifying Volume L/h 2.0
EER (Btu/h)/W 3.2
COP W/W 3.6
SEER W/W /
HSPF W/W /
Application Area m227-42
Indoor Unit
Model of indoor unit
AST-24AI
Product Code CH156N00800
Fan Type Centrifugal
Diameter Length(DXL) mm Φ350X130.5
Fan Motor Cooling Speed(SH/H/M/L/SL) r/min 600/500/450/400/-
Fan Motor Heating Speed(SH/H/M/L/SL) r/min 600/500/450/400/-
Output of Fan Motor W 65
Fan Motor RLA A /
Fan Motor Capacitor μF /
Evaporator Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Row-n Gap mm 2-1.3
Coil Length (LXDXW) mm 724X25.4X392
Swing Motor Model MP35AA/MP24TA
Output of Swing Motor W 2.5/1.5
Fuse A 5
Sound Pressure Level (SH/H/M/L/SL) dB (A) 49/45/42/39/-
Sound Power Level (SH/H/M/L/SL) dB (A) 63/57/53/50/-
Dimension (WXHXD) mm 507X1770X320
Dimension of Carton Box (LXWXH) mm 1985X620X425
Dimension of Package(LXWXH) mm 1988X623X440
Net Weight kg 40
Gross Weight kg 53.5

Service Manual
3
Technical Information
The above data is subject to change without notice; please refer to the nameplate of the unit.
Outdoor Unit
Model of Outdoor Unit AST-24AI
Product Code CH156W00800
Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO,LTD.
Compressor Model QXFS-D25zX090H
Compressor Oil R68EP
Compressor Type Rotary
L.R.A. A 24A
Compressor RLA A 11.0
Compressor Power Input W 2420.0
Overload Protector "HPC115/95U1
KSD115℃"
Throttling Method Electron expansion valve
Operation Temp ºC -15~43
Ambient Temp (Cooling) ºC -15~43
Ambient Temp (Heating) ºC -15~24
Condenser Form Aluminum Fin-copper Tube
Pipe Diameter mm Φ7
Rows-n Gap mm 2-1.4
Coil Length (LXDXW) mm 935X38.1X660
Fan Motor Speed rpm 800
Output of Fan Motor W 60.0
Fan Motor RLA A 0.6
Fan Motor Capacitor μF /
Air Flow Volume of Outdoor Unit m3/h 3200
Fan Type Axial-ow
Fan Diameter mm Φ520
Defrosting Method Automatic Defrosting
Climate Type T1
Isolation I
Moisture Protection IPX4
Permissible Excessive Operating
Pressure for the Discharge Side MPa 4.3
Permissible Excessive Operating
Pressure for the Suction Side MPa 2.5
Sound Pressure Level (H/M/L) dB (A) 60/-/-
Sound Power Level (H/M/L) dB (A) 68/-/-
Dimension (WXHXD) mm 963X700X396
Dimension of Carton Box (LXWXH) mm 1026X455X735
Dimension of Package(LXWXH) mm 1029X458X750
Net Weight kg 53.32
Gross Weight kg 58
Refrigerant R410A
Refrigerant Charge kg 2
Connection
Pipe
Length m 5
Gas Additional Charge g/m 50
Outer Diameter Liquid Pipe mm Φ6
Outer Diameter Gas Pipe mm Φ16
Max Distance Height m 10.0
Max Distance Length m 25.0
Note: The connection pipe applies metric diameter.

Service Manual
4
Technical Information
2.3 Capacity Curve in Different Outdoor Temperature
2.2 Operation Characteristic Curve
Cooling Heating
01020304050607090 0102030405060708090100 120110
80
11
10
9
8
7
6
5
4
3
2
1
0
11
10
9
8
7
6
5
4
3
2
1
0
220V 220V
Current (A) Current (A)
Conditions
Indoor:DB27°C/WB19°C
Outdoor:DB35°C/WB24°C
Indoor air flow:Super High
Pipe length:5m
Conditions
Indoor:DB20°C/WB15°C
Outdoor:DB7°C/WB6°C
Indoor air flow:Super High
Pipe length:5m
Compressor speed (rps) Compressor speed (rps)
2.3 Capacity Variation Ratio According to Temperature
Cooling Heating
Outdoor Temp.(°C) Outdoor Temp.(°C)
Capacity ratio(%)
Capacity ratio(%)
29 34 39 44 49 54
60
70
80
90
100
110
120
50
40 40
50
120
110
100
90
80
70
60
108-07-20
-30 -15
Conditions
Indoor: DB20°C/WB15°C
Indoor air flow: High
Pipe length: 5m
Conditions
Indoor: DB27°C/WB19°C
Indoor air flow: High
Pipe length: 5m

Service Manual
5
Technical Information
2.4 Cooling Data Sheet in Rated Frequency
Instruction:
T1: Inlet and outlet pipe temperature of evaporator
T2: Inlet and outlet pipe temperature of condenser
P: Pressure at the side of big valve
Connection pipe length: 5 m.
Rated cooling condition(°C)
(DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe
temperature of heat exchanger
Fan speed
of indoor
unit
Fan speed
of outdoor
unit
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/24 AST-24AI 0.9 to 1.1 in:8~11
out:11~14
in:65~75
out:37~43 Super High High 48
Rated heating condition(°C)
(DB/WB) Model
Pressure of gas pipe
connecting indoor and
outdoor unit
Inlet and outlet pipe
temperature of heat
exchanger
Fan speed of
indoor unit
Fan speed of
outdoor unit
Compressor
frequency
(Hz)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
20/- 7/6 AST-24AI 2.0 to 2.3 in:75~8
out:33~38
in:1~3
out:4~8 Super High High 56
Cooling:
Heating:
2.5 Noise Curve
60 60
65
60 80 100
50
50
40
40
40
30
30
20
20
20
10
00
Noice/dB(A)
low Middle High Super High
)A(Bd/esioN
Indoor side noise when blowing
Indoor fan motor rotating speed Compressor frequency/Hz
Outdoor side noise when blowing

Service Manual
6
Technical Information
3. Outline Dimension Diagram
3.1 Indoor Unit
Unit:mm
+
:'
Model W H D
AST-24AI 507 1770 320

Service Manual
7
Technical Information
897 340
560
463
963
396
007
Unit:mm
3.2 Outdoor Unit

Service Manual
8
Technical Information
4. Refrigerant System Diagram
Indoor unit Outdoor unit
Indoor unit Outdoor unit
COOLING
HEATING
Accumlator
4-Way valve
COOLING
Discharge
Suction
Discharge
Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(evaporator) Heat
exchanger
(condenser)
Valve
Valve
Valve
Valve
Liquid pipe
side
Gas pipe
side
Liquid pipe
side
Gas pipe
side
Compressor
Strainer
StrainerElectronic
expansion
Strainer
Capillary
Connection pipe specication:
Liquid : 1/4" (6 mm)
Gas : 5/8" (16mm)

Service Manual
9
Technical Information
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5. Electrical Part
5.1 Wiring Diagram
● Indoor Unit
● Instruction
Symbol Symbol Color Symbol Symbol Color Symbol Name
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
600007001200

Service Manual
10
Technical Information
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● Outdoor Unit
These wiring diagrams are subject to change without notice; please refer to the one supplied with the unit.
60000700094301

Service Manual
11
Technical Information
5.2 PCB Printed Diagram
Indoor unit
1Copper pin terminal of
communication wire
2Needle stand of display
board
3Needle stand of up&right
swing
4Needle stand of left&right
swing
5Door switch terminal
6Electrostaitc dedusting
terminal
7Needle stand of temperature
sensor
8
Inspection needle stand for
up&down position of sliding
door
9Test needle stand
10 Simulation burning needle
stand
11 Needle stand of DC fan
12 Fuse of E-heater
13 Copper pin of live wire of
E-heater
14 Earthing wire terminal
15 Fuse
16 Copper pin terminal of live
wire
17 Copper pin terminal of neutral
wire
18 Motor terminal of sliding door
● Top view
● Bottom view
5
6
7
8
9
10
11
12
13
14 15 16 17 18
1
2
3
4

Service Manual
12
Technical Information
Outdoor unit
● Top view
● Bottom view
1
2 3 4 5 6 7 8
9
10
11
12
16171819
1Terminal of compressor
wire
2Terminal of electronic
expansion valve
3Terminal of sensor
4Terminal of compressor
overload protection
5Terminal of high pressure
protection
6Terminal of outdoor fan
7Terminal of compressor
electric heating
8Terminal of 4-way valve
9Power supply live wire
10 Communication wire with
indoor unit
11 Earthing wire
12 Power supply neutral wire

Service Manual
13
Technical Information
6. Function and Control
6.1 Function Buttons of Air Conditioner
Button’s Name and Function
Introduction for icons on display screen of air conditioner
Timer
display
Ambient temperature
or set temperature
display or others
Operation
Cooling display
Dry display
Fan display
E-Heater display
Defrosting display
Heating display
Fan speed display
display
1
6
2
3
4
54FUNCTION button
2MODE button
MODE
3FAN button
FAN
FUNC.
1ON/OFF button
ON/OFF5▼/▲ button
6button
/
ON/OFF button
MODE button
1
2
FAN button
3
●
This series unit adopts touch buttons. You only need to touch the buttons slightly.
Press this button to turn on or turn off the unit.(Note: Under X-FAN mode, press this button to turn on the unit directly.)
●
Every time press this button, the mode will switchover in cycle among.
(Note: Cooling only unit won’t accept heating operation signal. For cooling only unit, pressing MODE button under FAN mode will
skip heating mode and enter cooling mode.)
COOLING DRY
HEATING FAN
●
Press this button and then fan speed can be selected and displayed in the
sequence as below:
(Note:Only low fan speed is available for dry mode. Fan speed can't be adjusted
under dry mode. Turbo cannot be set in FAN mode.)
(low) (medium) (high)
(turbo)
Note:
FUNCTION button
4
●
●
Under on status, press Function button to switch between timer and auxiliary heating function setting (auxiliary heating
can be set only in heating mode). When timer or auxiliary heating icon is blinking, it means this function can be set. Press
"▲" or "▼" button to set function. If there’s no operation change within 5s after setting is finished, the function setting will be
confirmed. Or press Function button again to exit or confirm the function.When the function is selected through Function
button, if the unit is not turned off and no remote control signal is received within 2min, pressing Function button again to
circulate from the previous set function.After 2min or the unit is turned off or remote control signal is received, pressing
Function button again to circulate from timer icon. (Note: Only when the unit is under heating mode and with auxiliary heating
function, auxiliary heating function can be turned on or off through Function button.)
Under off status, if the unit is in X-FAN status, press Function button to turn off the unit directly; if the unit is not in X-FAN status,
press Function button to set timer ON.

Service Manual
14
Technical Information
Button’s introduction
Operation display
Timer display
● It indicates the air conditioner is
put through the power. Under on
Heating display
ƽ
When this indicator is on, it
indicates the timer function
is turned on.
status, this indicator is on; under
off status, this indicator is off.
●When this indicator is on, it
indicates the heating mode is
turned on.
●When this indicator is on, it
indicates the defrosting function
is turned on.
ƽ
●
●
When this indicator is on, it indicates
the dry mode is turned on.
When this indicator is on, it indicates
the cooling mode is turned on.
When this indicator is on, it indicates
the E-heater function is turned on.
●When this indicator is on, it indicates
the fan mode is turned on.
● Displays the fan speed. The fan speed
is displayed as below:
Dry display
E-Heater display
Cooling display
Fan display
Icon function introduction
button
6
●
Left and right swing: this button controls the left and right swing motor, single pressit to switchover between ON and OFF.
●
Up and down swing: this button controls the up and down swing motor, single pressit to switchover between ON and OFF.
▼/▲ button
5
●
After each pressing of "▲" or "▼" button, set temperature will increase or decrease
auto mode. Timer setting can be set in 1h increment among 0~24h. When it is adjusted to
auxiliary heating function setting through Function button,press this button to turn on or turn off auxiliary heating. (Note: auxiliary
heating is valid only for the model with this function.)
1ć
. Temperature adjustment range is
ć~30 ć. This button is invalid under
●
Hold "▲" and "▼" buttons for 3s and the air conditioner will display "LC", which indicates buttons are locked. Any button
under on status or ON/OFF button and function buttons under off status are all invalid. Hold these two button for 3s
again to release the lock.
Fan speed display
Defrosting display
(low) → (medium) →
(high) → (turbo)
/
16

Service Manual
15
Technical Information
6.2 Remote Control Operations
This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function, which the
model doesn't have, if press the corresponding button on the remote controller that the unit will keep the original running status.
Buttons on remote controller
Introduction for icons on display screen
6
3
7
9
10
14
15
13
12
8
11
5
4
2
1
X-FAN function
Turbo fan speed
Quiet mode
Set fan speed
(No fan speed. It’s displayed
only after turning it on.)
{
Send signal
Switch temperature displaying type on
the unit’s display
Set time
TIMER ON/TIMER OFF
Child lock
Up & down swing
Left & right swing
battery power
Heat mode
Fan mode
Dry mode
Cool mode
Auto mode
Operation mode
I feel function
Sleep mode
WiFi This is a general remote controller.Some
models have this function while some
do not. Please refer to the actual models.
{
1ON/OFF button
2SAVE button
3FAN button
4MODE button
6
button
7
button
9
COOL button
14 LIGHT button
15 TIMER button
12
SLEEP button
13 QUIET button
10
HEAT button
8
X-FAN/E-HEATER button
11 WiFi button
5▲/ button
▲
Introduction for buttons on remote controller
● After putting through the power, the air conditioner will give out a sound.
Operation indictor " " is ON. After that, you can operate the air conditioner by using remote controller.
● Under on status, pressing the button on the remote controller, the signal icon " " on the display of remote controller will
blink once and the air conditioner will give out a “di” sound, which means the signal has been sent to the air conditioner.