SANG TAC-12CHSA/JAI User manual

Air Conditioner Service Manual
Inverter air conditioner
Service Manual
Models
TAC-12CHSA/JAI TAC-18CHSA/JAI
TAC-24CHSA/JAI
CONTENTS
1. Important Notice
2.
3. Product Dimensions
4. Refrigeration cycle diagram
5. Operation details
6. Wiring diagram
7. Explosion view and parts
8. Precaution
9. Names of parts
10.Installation
Trouble shooting

Air Conditioner Service Manual
1. Important Notice
This service manual is intended for use by individuals possessing adequate
backgrounds of electrical, electronic and mechanical experience. Any
attempt to repair the appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible for the
interpretation of this information, nor can it assume any liability in
connection with its use.
The information, specifications and parameter are subject to change due to
technical modification or improvement without any prior notice. The
accurate specifications are presented on the nameplate label.
How to order spare parts
To have your order filled promptly and correctly, please furnish the following
information:
1. Model No. with Indoor or Outdoor
2. No. in the Explosion View
3. Part Name
4. The quantity you ordered

Air Conditioner Service Manual
2.Product Dimensions
Indoor Unit:
Outdoor Unit:
Model
A
B
C
D
E
F
G
H
I
J
K
12K 710 240 180 700 552 256 439.2 302 277.8 48 55
18K 900 280 202 760 605 290 500 360 327.5 55 63
24K 1033 202 313 820 650 307 623 399 349 65 63

Air Conditioner Service Manual
3.Refrigeration cycle diagram
Cooling only
Heat pump
Capillary
Compressor
Accumulator
Heat exchange
(condenser)
Heat exchange
(Evaporator)
2-way valve
Liquid side
3-way valve
Gas side
Cooling
Heating
Gas side
3-way valve
Liquid side
2-way valve
Heat exchange
(Evaporator) Heat exchange
(condenser)
Accumulator Compressor
4-way valve
Capillary Assembly
Check valve

Air Conditioner Service Manual
4.Operation details
Remote controller
Note: Each mode and relevant function will be further specified in following pages.
Remote controller:
The remote controller is not preset as Cooling Only Air Conditioner or Heat Pump bymanufacturer.
Each time after the remote controller replace batteries or is energized, the arrowhead will flashes
on the front of Heat or Cool on LCD of the remote controller.
User can preset theremote controller depending on the air conditioner type you have purchased as
follows:
Press any button when the arrow head flashes on the front of Cool, Cooling Only is set.
Pressanybuttonwhen thearrow headflashes onthefrontof Heat, Heat Pump is set.
If you don’ t press any button within 10 seconds, the remote controller is preset as Heat Pump
automatically.
Note:
If the air conditioner you purchased is a Cooling Only one, but you preset the remote controller as
Heat Pump, it doesn’t bring any matter. But if the air conditioner you purchased is aHeat Pump one,
and you preset the remote controller as Cooling Only, then you CAN NOT preset the Heating
operation with the remote controller.
SLEEP FAN
TIMER SWING
ON/OFF
MODE
MID
SWING
AUTO
DRY
FAN
HEAT
COOL
FEEL SLEEP TIMERON
HIGH
LOW
TMIEROFF
7
8
2
6
5
4
3
1
1ON/OFF button
2
2Swing control button
3FAN SPEED control button
Used to select the indoor fan motor
speed: AUTO, High, Mid and Low
Used to star and stop operation
when pressed.
Used to adjust airflow direction
Used to decrease the set room
temperature and time.
5SLEEP button
Used to set or cancel sleep mode operation.
6TIMER button
Used to set select TIMER operation.
7MODE button
Used to select the type of operation mode:
Feel, Cooling, Dry, Fan and Heating (Only for
Heat Pump).
8DOWN button
4UP button
Used to decrease the set room temperature
and time.

Air Conditioner Service Manual
ElectronicController
4.1 Safety Protection
(1) Time Delay for Safety protection
3 minutes delay for compressor ---The compressor is ceased for 3minutes before restarting
to balance the pressure in the refrigeration cycle in order to protect the compressor.
(2) Discharge temperature protection
There is a temperature sensor on top of compressor, when the temperature exceed the limit,
system control will shut down compressor and IDU display board shows error code E8.
(3) Lower voltage protection
WhenAC voltage ≤158V and keep it for 10 seconds, unit will be shut down for protection.
(4) Over voltage protection
WhenAC voltage ≥260V, unit will be shut down and recover whileAC≤255V.
(5) Over current protection
When current of outdoor unit overload, the controller will shut down unit for protection.
(6) Compressor driving protection
When compressor start on or in the process of running, if there is no feedback to controller or
load of compressor is abnormity, the air conditioner will shut down, and show error code
E9.
(7) IPM module protection
IPM module has high temperature & over current protection itself, when it happened the IDU
display shows E9 error code, also LED on ODU PCB blinks.
4.2Auto Mode (FEEL)
(1) When the Auto mode is selected, the operation mode and initial temperature set are
determinedbythe initial room temperature atstart-upof operationexceptturnthe airconditioner
off and operate it again.
(2) If the mode is change to FEEL from others, the FEEL mode doesn’t operate until compressor
to be stopped for more than 3 minutes.
Mode
Initial Room Temperature
Initial Set Temperature
COOLING
RT≥26℃
23℃
DRY
26℃>RT≥20℃
RT-2℃
HEATING for Heat Pump/
FAN for Cooling Only
RT<20℃
23℃(HEATING) or
“—“ (FAN)
In the FEEL mode, the controller can adjust temperature by 1 ℃ press ▲ or ▼button, and the

Air Conditioner Service Manual
maximum adjustment is RT±2 ℃ .
4.3 CoolingMode
(1) Compressor frequency control.
According to the difference of Room Temperature and Set Temperature (δt = RT-ST), running
frequency of the compressor is controlled by electronic controller. When room temperature is
much higher than set temperature, the compressor will start at a high frequency, and while the
room temperature goes down, the compressor running frequency decline to lower value.
Whenroom temperature is lower than the set target,thecompressor will run at very low frequency.
In general, unit will change its running frequency according to δt to make the room temperature
closing to the set value.
(2) Outdoor temperature affects running frequency of the compressor.
Outdoor temperature affect compressor’s running frequency. Difference inlet temperature of
outdoor unit is adapted by difference compressor running frequency. While outdoor temperature is
about 30℃, the compressor will run in high frequency.
If unit run in “Cooling” mode and outdoor temperature is less than -2℃,the controller will shut down
compressor and show error code, while the ambient temperature is over 1℃,the compressor will
run automatically.
(3) Auto fan control in cooling mode.
In cooling mode (include cooling at FEEL mode), fan speed is determined by δ tas the
following diagram:
(4) Anti-frosting protection of indoor evaporator.
If IPT≤-1°Cdetected in consecutive 3 min, the compressor and outdoor fan motor stop operation,
indoor fan motor runs at preset speed; If IPT≥5°Cdetected 3min later, then outdoor fan motor and
compressor will start up again, and indoor fan motor restores to it’s original state.
(5) ODU overheating protection.
If OPT>105°C, the compressor stop operation for protection.
If OPT≤90°C, the air conditioner recover to operate.
RT-ST
4℃
2℃
0℃
δt come down
δt come up
High fan
Mid fan
Low fan
4℃
2℃

Air Conditioner Service Manual
4.4 DRYMode
(1) The compressor, ODU fan motor operate the same cycle as Cooling mode.
(2) When the system operates in Dry mode, at first it operates in cooling mode, the set
temperature ST=RT-2℃constant, the system operates in low fan speed. During the course
of process, the fan speed can’t be adjusted by remote controller, but you can control the vane
direction.
(3) When RT≤12℃, the compressor stops and it will operate again while RT≥14℃.
(4) Protection under Dry mode is the same as Cooling mode.
4.5 FAN Mode
Under fan mode, the IDU fan motor runs at preset of High, Mid or low speed only.
There is no sensor or temperature protection at Fan mode.
The display shows “—“ or indoor room temperature.
4.6H EATING Mode (Heat Pump only)
On the Heating mode, the room temperature (RT) is compensated (CRT) -3°C , the room
temperature displayed on the LED is CRT=RT-3°C . (The temperature compensation on heating mode
controlled by ODU PCB)
(1) Frequency control
Same as frequency control in cooing mode, the running frequency of compressor is controlled
by PCB controller. Unit change its running frequency according to δ t to let the room
temperature closing to the set value in process.
(2) Indoor fan motor control
1) ColdAir Prevention Control
The function is intended to prevent cold air from being discharged when heating mode
selected or while in defrosting.
The indoor fan speed will be controlled as following.
In heating operation, if air conditioner turned off, the indoor fan motor will run at most
Breeze
Temperature UP
Temperature DOWN
Setting
Low fan
Stop
37℃
33℃
25℃
34℃
28℃
22℃

Air Conditioner Service Manual
for another 30 seconds since the compressor stopped.
2) Auto fan control (heating)
In heating mode (include in FEEL mode) , fan speed is determined by δtas the following:
(3) 4-way valve control
In heating mode, 4-way valve will power on ahead of compressor for 5 seconds, and cut off
for 2 minutes later than compressor. 4-way valve will not power off unless the machine to be
switched off, mode changed or on the process of defrosting.
(4) Defrosting
Defrosting is controlled by the microprocessor.
When one of the following conditions is satisfied, unit comes into defrosting:
a. When OPT≤3℃, unit operate continuously for 40 minutes, and OPT≤-6℃keeps for 3
minutes or more.
b. When OPT≤3℃,unit operate continuously for 80 minutes, and OPT≤-4℃keeps for 3
minutes or more.
c. When OPT≤3℃,unit operate continuously for 120 minutes, and OPT≤-2℃keeps for 3
minutes or more.
d. Before the air con comes into defrosting, compressor running frequency drop down to a
lower frequency firstly, then the compressor shuts down.
In defrosting, the max. frequency of compressor is F9 (a little less than the highest
frequency ). In this period all protection function are available.
ST-RT
δt come down
δt come up
0℃
High fan
Mid fan
Low fan
4℃
2℃
Compressor
ON
OFF
ON
OFF
ON
OFF
NORMAL
800
4-way valve
Expansion valve
Outdoor fan motor
50S
Defrosting time ≤10Mins
15S
15S
10S
2℃
4℃

Air Conditioner Service Manual
10
In defrosting, LED showing by winking.
No matter AC come into or out of defrosting, indoor fan motor speed is the same as Cold
Air Prevention Control.
While one of the following conditions satisfied, unit comes out of defrosting and shifts to
heating mode:
a. Outdoor coil Temperature (OPT) ≥15℃.
b. The time of defrosting keeps for more than 10 minutes.
(5) Indoor exchanger overheat protection
When IDU Pipe (exchanger) Temperature (IPT) is higher than 55℃, unit comes into indoor
exchanger overheat protection. The compressor drops its frequency toward to F1 level until
IPT≤52℃
If IPT≤52℃and keep for 5 minutes, control system doesn’t limit running frequency.
If IPT>62℃, control system shut down compressor, and recover while IPT drop less than 50℃.
4.7 “SLEEP” mode
When the SLEEP button is pressed, theAC operates as following:
The indoor fan speed is set at low speed, the power lamp and the sleep lamp is on,
the display of temperature will close after 30 seconds.
When selecting COOLING/DRY operation with SLEEP mode, the set temperature will
be raised by 1℃after 1 hour later and by 2℃2 hour later.
When selecting HEATING operation with SLEEPmode, the set temperature will be
dropped by 1℃1 hour later and 2℃2 hours later.
After the System operates in SLEEP mode for 8 hours, it will stop automatically.
4.8 EMERGENCYOperation
When the EMERGENCY switch is pressed one time, COOLING mode is selected and if the
switch press again within 3s, HEATING mode selected, while press third times, the unit will
switch off.
When the remote controller missing, failed or the batteries run down, press the
EMERGENCY Operation switch on front of the indoor unit for function test.
NOTE: Do not press the EMERGEMCY Operation switch during normal operation.
4.9 AUTO-RESTART Function (Option)
While air conditioner is operating in one mode, all of its operation data, such as working
mode, preset temperature etc. would be memorized into EEPROM. If power supply cut off
due to reasons and recover again, the AUTO-RESTART function will set synchronously
and the air conditioner would work at the same mode as before.
Note: Auto-restart Pre-setting (optional):

Air Conditioner Service Manual
11
To activate or cancel theAuto-restart function:
Press the SLEEP button 10 times within 8 second while air conditioner on operating state:
1). If theAuto-restart function to be turned off before, then it will be activated after press SLEEP
as above, and the buzzer BEEPs three times;
2). If the function to be activated before, it will be cancelledAuto-Restart at once, and the buzzer
BEEPs four times.
4.10 Protection and Failure Display
When protection display is available, controller will show error code, digital LED
shows error code and setting temperature by turns.
If there is more than one failure, it will show error codes according to the error list sequence.
To insure the signal communication of indoor and outdoor unit, any failure code relates
to outdoor unit will remain display for 2 minutes maximum after it’s recovered.
Among all the failure codes, sensor failure can be recovery automatically once it comes
normal.
Failure code (IDU)
Failure Type
DigitalLEDCode
Indoor and outdoor communication failure
E0
Indoor room temperature sensor (IRT)
E1
Indoor coil temperature sensor (IPT)
E2
Outdoor coil temperature sensor (OPT)
E3
System abnormity
E4
Model configuration wrong
E5
Indoor fan motor fault
E6
Outdoor temperature sensor
E7
Exhaust temp. sensor
E8
IPM drive and module fault
E9
Current sensor fault
EA
Communication failure of main PCB and display board
Eb
Outdoor communication failure
EC
Outdoor unit EEPROM fault
EE
Outdoor fan motor fault (DC motor)
EF
Temp. switch fault ( on top of the compressor)
EP
Voltage sensor fault
EU

Air Conditioner Service Manual
12
Outdoor failure display
There is a LED on outdoor power board, it blinks 1s ON and 1s OFF while compressor standby
and it light constantly (ON) while compressor running; If there is failure happened on ODU, The
indicator (LED) alerts the fault in a cycle as such that it light for 0.5 seconds ON, 0.5 seconds OFF,
blinks “n” times and then OFF for 3 seconds. For details as table below:
Blink
times(n)
Fault Message
Blink
times(n)
Fault Message
1
IPM protection
18
Short-circuit / open-circuit fault of
intake temperature sensor
2
Overvoltage / under voltage
19
Outdoor EEPROM fault
3
Overcurrent
20
Outdoor fan motor protection
4
Exhaust over temperature protection
21
Indoor fan motor protection
5
Outdoor coil over temperature
protection
6
Drive fault and protection (V1，VP1)
23
System in shortage of Freon
7
Communication fault with indoor unit
24
Model configuration wrong
8
Compressor overheat fault
(compressor top switch)
25
Indoor sensor fault
9
Short-circuit / open-circuit fault of
outdoor temperature sensor
26
Indoor coil sensor fault
10
Short circuit / open-circuit fault of
outdoor heat exchanger temperature
sensor
27
Indoor EEPROM fault
11
Short-circuit / open-circuit fault of
exhaust temperature sensor
28
Indoor fan motor fault
12
Voltage sensor fault
30
drive fault（V4、VP2）
13
Current sensor fault
31
Outdoor environmental
Over temperature /
Under temperature protection
14
IPM fault
32
Indoor coil defrost prevention
15
communication fault between power
source board and IPM
33
Indoor coil overheating protection
16
No feedback from DC fan
motor(outdoor unit)
17
Defrost state

5、Wiring Diagram
TAC-12CHSA/JAI

TAC-18CHSA/JAI

TAC-24CHSA/JAI

No. Part No. Part Name Q’ty Remark
1 1080030008 Installation Plate 1
2 1080320806 Base 1
3 1070321035 Vertical Vane Assembly 10
4 1070020026AA Cross Fan 1
5 1070100010 Bearing Mount 1
6 211205800F Evaporator 1
7 1070321678AA Face Frame 1
8 1070321022AA Screw Cover 2
9 1070320109 Air Filter 2
10 Display PCB Box
11 Display PCB
12 1070322516 Front Panel 1
13 1170120106 Power Supply Cord 1
14 1070321034AA Vane 1
15 1070110011 Drainage Hose 1
16 1070040006 Cable Clamp 1
17 210900240BB Main PCB 1
18 1070320113 Electrical Box 1
19 1170020011 Vane Motor 1
20 1170030067 Indoor Motor 1
21 1070320111 Indoor Motor Cover 1
22 1170230001 Indoor Sensor Assembly 1
23 1080320818 In And Out Pipe Fixer 1
24 1090050964 Remote Controller 1
25 1190060828UQ Indoor Carton 1
TCL Air Conditioner Service Manual
Indoor Unit-TAC-12CHSAJAI
Not shown in the
view
210901498 1
15
6
14
11
13
12
8
10
9
7
1
5
4
3
2
19
18
17
16
23
21
20
22

Outdoor unit_TAC-12CHSAJAI
No. Part No. Part Name Q’ty Remark
1 1071990039 Back Grille 1
2 1080320105 Top cover 1
3 211202396AA Condenser 1
4 1080050004 Outdoor motor supporter 1
5 1170040058H Outdoor motor 1
6 1070030050AA Propeller fan 1
7 1080050001 Left grille supporter 1
8 1080320113 Front plate 1
9 1080320112 Fan guard 1
10 211232796 Capillary assembly 1
11 211206855 Compressor 1
12 1120110016 4-way Valve 1
13 211232688 4-way Valve Assembly 1
14 210800466 base 1
15 1120120021 Two-way valve 1
16 1080050003 Valve supporter 1
17 211206766 Three-way valve 1
18 1080050002 Right plate 1
19 1070350971 Electrical box cover 1
20 1070040008 Cable clamp 1
21 1170200061 Terminal 1
22 210900955AL Outdoor PCB assembly 1
23 1171990046 Inductor 1
24 1080050119 Partition plate 1
25 1170230007A
Pi
pe
T
emp. sensor an
d
out
d
oor
T
emp.
sensor
1
26 1170230006A Discharge Temp. sensor 1
27 211311098VC Cabinet carton 1
Air Conditioner Service Manual
Not shown in
explosion view
43 21
18 19
24
23
22
21
20
675
17
14 15 16
8
9
12 13
10 11

Indoor Unit- TAC-18CHSAJAI
No. Part No. Part Name Q’ty Remark
1 1080030021 Installation Plate 1
2 1070350872AA Base 1
3 1070020024AA Cross Fan 1
4 1070100010 Bearing Mount 1
5 1110050889 Evaporator 1
6 1070450386 Water Drainage Assembly 1
7 1070350141 Vertical Vane Assembly A 12
8 1070450900AA Face Frame 1
9 1073073233 Screw Cover 3
10 1070450397 Air Filter 2
11 Display PCB Box
12 Display PCB
13 1070451368 Front Panel 1
14 1070450893AA Display PCB Cover 1
15 1170120106 Power Supply Cord 1
16 1070450387AB Vane 1
17 1070110011 Drainage Hose 1
18 1070040003 Cable Clamp(&8) 1
19 1170020041A Vane Motor 1
20 1073010501 Sensor Holder 1
21 210900001AY Main PCB 1
22 1070350152 Indoor Motor Cover 1
23 1170030065 Indoor Motor 1
24 1070451080 Electrical Box 1
25 1170240001 Transformer 1
26 1170230001 Indoor Sensor Assembly 1
27 1080320819 In And Out Pipe Fixer 1
28 1090050964 Remote Controller 1
29 1190470001NP Indoor Carton 1
Air Conditioner Service Manual
Not shown in Explosion
view
210901498 1
5
7
6
4
14
9
10
12
11
13
8
15
16
17
18
19
20
21
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23
24
25
26
1
2
3

Outdoor unit-TAC-18CHSAJAI
No. Part No. Part Name Q’ty Remark
1 1071990040 Black Grille 1
2 1080050011 Top cover 1
3 211232538B Condenser 1
4 1080050004 Outdoor motor supporter 1
5 1170040149 Outdoor motor 1
6 1070030050AA Propeller fan 1
7 1080050001 Left grille supporter 1
8 1080050009 Front plate 1
9 210800814 Fan guard 1
10 211232539 Capillary Assembly 1
11 211202953 Compressor 1
12 1120500226 4-way Valve 1
13 211230555 4-way Valve Assembly 1
14 210800433A base 1
15 1120120021 Two-way valve 1
16 1080050003 Valve supporter 1
17 211206766 Three-way valve 1
18 1080050002 Right plate 1
19 1070350971 Electrical box cover 1
20 1070040008 Cable clamp 1
21 1170200061 Terminal 1
22 210900423AG Outdoor PCB assembly 1
23 1171990046 Inductor 1
24 1080050120 Partition plate 1
25 1170230007A Pipe Temp. sensor and outdoor
Temp. sensor 1
26 1170230006A Discharge Temp. sensor 1
27 211311128CB Cabinet Carton 1
Air Conditioner Service Manual
Not shown in explosion
view
43 21
18 19
24
23
22
21
20
6
75
17
14 15 16
8
9
12 13
10 11

Indoor Unit- TAC-24CHSAJAI
No. Part No. Part Name
Q
’t
y
Remark
11080030001 Installation Plate 1
21080320810 Base 1
31070020014AA Cross Fan 1
41070100010 Bearin
g
Mount 1
5211206151G Eva
p
orator 1
61070701049 Water Draina
g
e Assembl
y
1
1070701050 Vertical Vane Assembl
y
A 16
1070701051 Vertical Vane Assembl
y
B 1
81070701060AB Face Frame 1
91073073232 Screw Cover 3
1070190058 Left Air Filter 1
1070190059 Ri
g
ht Air Filter 1
11 Dis
p
la
y
PCB Box
12 Dis
p
la
y
PCB
13 210701152 Front Panel 1
14 1070701068AA Dis
p
la
y
PCB Cover 1
15 210735994 Electrical Box Cover 1
16 1170120050 Power Su
pp
l
y
Cord 1
17 1070701418 Vane A 1
18 1070701419 Vane B 1
19 1070110011 Draina
g
e Hose 1
20 1070040008 Cable Clam
p(
&8
)
1
21 1170020041 Vane Motor 2
22 1073010501 Sensor Holder 1
23 210900853F Main PCB 1
24 210705201 Indoor Motor Cover 1
25 210900087 Indoor Motor 1
26 210704914 Electrical Box 1
27 / Transforme
r
1Soldered on PCB
28 1170230001 Indoor Sensor Assembl
y
1
29 1090050964 Remote Controller 1
30 1190060003KP Indoor Carton 1
Air Conditioner Service Manual
7
10
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210901535 1
1
2
3
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6
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