TCL TACM2O-28HIA User manual

Air Conditioner Service Manual
0
Free Match Inverter air conditioner
Service Manual
Models
TACM2O-14HIA TACM2O-18HIA
TACM2O-21HIA TACM2O-28HIA
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

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1
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

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2
3. Product Dimensions
Indoor Unit:
Wall split type
Model
A
B
C
9K
810
292
198
12K
810
292
198
Cassette type
574
19
620
304
574 124
64
144
293
50
113
95
255
45
Duct type
Model
A B
C
D
E
F
G
H
I
J
7/9/12K
700 450
200
570
172
510
140
738
298
158
18K
925450
200
790
172
730
140
958
298
158
A
H
F
I
J
B
E
C
G
D

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Outdoor Unit:
Model
Outdoor unit
D
E
F
G
H
I
J
K
14000BTU
780
605
290
521
360
327.5
55
56
18000BTU
780
605
290
521
360
327.5
55
56
21000BTU
900
660310
623
374
347
61
56
24000BTU
940
910
340
600
400
375
80
56

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4. Refrigeration cycle diagram
TIN1 PMV1
TIN2
TIN3
PMV2
PMV3
PMV4
TIN4
T2B1
T2B2
T2B3
T2B4 ST
CONDENSER
liquid
storage
pot
T3
T4
TP
HP
COMPRESSOR
Optional
Evaporator

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5
5. 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 by manufacturer.
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 the remote 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.
Press anybuttonwhen 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 a Heat Pump one,
and you preset the remote controller as Cooling Only, then you CAN NOT preset the Heating
operation with the remote controller.
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.
MODE
FAN SLE EP
ECO TIM ER
SWING
TURBOMUTE
DISPLAY
SWING
HE ALTHI FE EL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

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6
Electronic Controller
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.
150 seconds delay for 4-way valve---The 4-way valve will be ceased for 150 seconds
late after compressor to prevent the refrigerant-gas abnormal noise when the HEATING
operation is OFF or switch to the other operation mode.
(2) Discharge temperature protection
There is a temperature sensor on discharge pipe, when temperature on discharge pipe
exceeded the limit 115℃, system control will shut down the compressor and the display board
will show the error code.
(3) Lower voltage protection
WhenAC voltage <160V, DC voltage<170V, unit will be shut down for protection and recover while
the AC voltage ˃170 V, DC voltage ˃190V.
(4) Over voltage protection
When AC voltage ˃275V, DC voltage ˃400V unit will be shut down and recover while AC
voltage<255V, DC voltage<390 V.
(5) Over current protection
When the current of outdoor unit is overload, controller will drop the operation frequency or shut
down the unit immediately and show error code.
(6) Condenser temperature protection
When condenser temperature≥65℃and keep 10s, the air conditioner will shut down, and
show error code, and recover while condenser temperature<52℃and the compressor stop for
3minutes.
(7) IPM module protection
IPM module has high temperature & over current protection itself, if there is signal feedback to
IPM, the outdoor unit will shut down, LED on outdoor PCB will show the error code.
(8) Evaporator freeze protection.
When evaporator temperature<2℃, the controller will drop compressor operate frequency.
When evaporator temperature<0℃and keep 1 minute, the expand valve of the unit will stop.
When all of the operating unit enter freeze protect, the compressor will stop and recover while
evaporator temperature and stop for 3 minutes.
2. “Feel” Mode Operation
(1) When the “Feel” mode is selected, the operation mode and initial temperature set are
determined by the initial room temperature at start-up of the operation except to turn off the air
conditioner and operates it again.
(2) If the unit have activate the AUTO restart, when the power off and supply again, the unit will
judge the condition again and enter the “Feel” mode.
(3) If the mode is change to “Feel” from other mode, the “Feel” mode doesn’t operate until
compressor stop for more than 3 minutes.
Mode
Initial Room Temperature
Initial Set Temperature
COOLING
RT=26℃
23℃
DRY
26℃>RT≥20℃
RT-2℃
HEATING
RT<20℃
23℃
Fan
RT<20℃
RT

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In the “Feel” mode, when the controller receives the up or down signal of temperature, the set
temperature can adjust by 1℃upper or lower. The biggest you can adjust by 2℃upper or lower.
3. “COOLING” Mode Operation
(1) Compressor frequency control
According to difference room temperature and set temperature (δt = RT-ST), running frequency
of compressor is controlled by electronic controller. When room temperature is much higher than
set temperature, the compressor will start at a high frequency, and as room temperature goes
down, the compressor running frequency will go down. When room temperature is lower than set
temperature, the compressor will run at very low frequency. In general, unit will change its running
frequency according to δt to make room temperature closing to set temperature.
(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 in “Feel” mode), fan speed is determined by δ t, as the
following diagram:
4.“DRY” Mode Operation
(1)The system for DRY operation used the same refrigerant circle as the cooling one.
(2)When the system operates in DRY mode, at first it operates in cooling mode, the set
temperature (ST) is “RT-2℃”. After that, the system will operate in cooling mode with
lowest fan speed. During the course of this operation, you can’t use remote controller to adjust
the fan speed but you can control the vane direction.
(3)In the dry mode, when RT≤12℃, the compressor will stop and operates again at RT≥14℃.
5. “HEATING” Mode Operation (available for Heat Pump only)
(1) Frequency control
Same as the frequency control in cooing mode, the running frequency of compressor is
controlled by controller. Unit change its running frequency according to δ t to make the room
temperature closing to the set temperature.
(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.
RT-ST
℃
4.0
3.0
1.5
1.0
δt come down
δt come up
High fan
Min fan
Low fan

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In heating operation, if air conditioner turn off, the indoor fan motor will run most for 30
seconds since the stop of compressor.
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 8seconds, 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) Outdoor fan motor control
In heating mode, the outdoor fan motor will power on ahead of compressor 5 seconds, and
cut off for 30seconds later than compressor.
(5) Defrosting
Defrosting is controlled by the microprocessor.
When the unit operate 30 minutes accumulated and the compressor operation more than 3
minutes continuously, one of the following conditions is satisfied, unit comes into defrosting:
a. When FrostDeg ≥-5℃, and OPT ≤-5℃,the .2 times defrosting interval time is 45 minutes.
b. When -10℃≤FrostDeg < -5℃, and OPT < FrostDeg , the .2 times defrosting interval time is
45 minutes.
c. When -13℃≤FrostDeg < -10℃, and OPT < FrostDeg , the .2 times defrosting interval time is
RT-ST
δt come down
δt come up
℃
Breeze
Temperature up
Temperature down
Setting
Low fan
Stop
37℃
33℃
25℃
33℃
25℃
20℃
4.0
3.0
1.5
1.0
High fan
Min fan
Low fan
Indoor pipe Temperature
3S
5S
30S
120S
ON
OFF
ON
ON
OFF
OFF
4-WAY valve
Outdoor fan motor
Compressor
5S
30S
ON
ON
OFF
OFF
Outdoor fan motor
Compressor

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45 minutes.
d. When -15℃≤FrostDeg < -13℃, and OPT < FrostDeg , the .2 times defrosting interval time is
65 minutes.
e. When -15℃≤FrostDeg < -10℃, and OPT < FrostDeg , the .2 times defrosting interval time is
75 minutes.
f. When FrostDeg < -15℃, and OPT < -15℃, the .2 times defrosting interval time is 75 minutes.
FrostDeg = C*OAT-α
OAT: Outdoor environment temperature.
When OAT< 0℃, C=0.8, when OAT≥0℃, C=0.6
α=8
Before the air con comes into defrosting, compressor running frequency drop down to a
lower frequency firstly, then the compressor shuts down.
In defrosting, all protection function are available.
T1 T2 T3 T4 T5 T7 T8 T9 T10T6
Compressor Frequency
Outdoor Fan Motror
4-way Valve
ON
OFF
ON
OFF
ON
OFF
Defrost Hightest Frequency
T
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
Times
Drop frequency
or stop
50s
5s
5s
Rise
frequency
2-11Min
Stop
Defrost
50s
10s
Rise frequency
In defrosting, LED showing by winking.
No matter what 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 is satisfied, unit comes out of defrosting and shifts to
heating mode:
a. Outdoor coil Temperature (OPT) >5℃and keeps 30 seconds.
b. Outdoor coil Temperature (OPT) >10℃and keeps 2 seconds.
c. Continue 11minutes defrost Operation.
(5) Indoor exchanger overheat protection
When Indoor exchanger Temperature (IPT) is higher than 54℃, unit comes into indoor exchanger
overheat protection. The compressor drops its frequency.
If IPT≥65℃and keep for 30 seconds, control system shut down compressor, and recover while IPT
drop less than 52℃.
6. “SLEEP” mode
When the SLEEP button is pressed, the AC 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℃1 hour later and by 2℃2 hour later, after 3 hours, the set temperature will be
raise by 3℃and keeps 2hours. And then the temperature is Set+2℃, after 1 hour, the
temperature is set temperature and keep.

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When selecting HEATING operation with SLEEP mode, the set temperature will be dropped
by 1℃1 hour later and 2℃2 hours later, after 3 hours, the set temperature will be dropped by
3℃and keep 2 hours. And then the temperature is Set-2℃, after 1 hour, the temperature is
set temperature and keep.
7. EMERGENCY Operation
When the EMERGENCY Operation switch is pressed, “Beep”a short sound, COOLING mode
is selected, two short sound the HEATING mode selected, and a long sound the unit off of 3s.
During the unit operation in emergency operation, when the unit receive the signal of remote
controller, the unit will operates by remote.
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.
8. 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 IC by main PCB. 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.
Auto-restart Pre-setting (optional):
If Auto-restart function is needed, follow the steps below to activate this function:
1) Pulling the air-con's plug out of socket.
2) Pressing and holding the Emergency button (ON/OFF) on the indoor, then insert the plug
into the socket again.
3) Keep pressing the Emergency button for more than 10 seconds until three short beeps
heard, the Auto-restart function been activated.
4) When the unit in operation, press the timer button 10 times in 8s, the Auto-restart
function will be active，if the Auto-restart is active, the Auto-restart off.
9. Water pump control(cassette and duct type)
When the unit operates in cool or dry mode, the water pump operates, once the compressor
off or change to other mode, the water pump stop after 10 minutes.
Anytime, when the unit check the water full, the water pump operates, the unit stop and
display the water full code. When the water full eliminate, the water pump will stop after 10
minutes.
When check the water pump switch open for 8 seconds continuous, enter water full
protection, and check the water pump switch on for 180 seconds continuous, the water full
protection exit.
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.

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Error list
Failure Type
Indoor LED
Code
CASSETTE
Outdoor light
blink time (n)
LED1
LED2
LED3
LED4
Indoor and outdoor communication failure
E0
●
●
●
◎
7
Outdoor communication failure
EC
◎
◎
●
●
15
Indoor room temperature sensor (IRT)
E1
●
●
◎
●
25
Indoor coil temperature sensor (IPT)
E2
●
●
◎
◎
26
Outdoor coil temperature sensor (OPT)
E3
●
◎
●
●
10
IPM over current protect
E4
●
◎
●
◎
40
Compressor phase-deficient operation
34
Model configuration wrong
E5
●
◎
◎
●
29
Indoor fan motor fault
E6
●
◎
◎
◎
21
Outdoor temperature sensor
E7
◎
●
●
●
9
Exhaust temp. sensor
E8
◎
●
●
◎
11
IPM drive and module fault
E9
◎
●
◎
●
30
Outdoor fan motor fault (DC motor)
EF
◎
◎
◎
◎
16
Current sensor fault
EA
◎
●
◎
◎
13
Indoor EEPROM fault
EE
◎
◎
●
◎
27
Outdoor EEPROM fault
EE
◎
◎
◎
●
19
Temp. switch fault ( on top of the
compressor)
EP
-
-
-
-
8
Voltage sensor fault
EU
○
●
●
◎
12
Outlet temperature sensor A fault
Ey
○
●
◎
●
47
Outlet temperature sensor B fault
48
Inlet temperature sensor A fault
En
○
●
◎
◎
51
Inlet temperature sensor B fault
52
Protection display code list:
○--light ●--off ◎—flash
Outdoor failure display
ProtectionType
Indoor LED
Code
CASSETTE
Outdoor light
blink time (n)
LED1
LED2
LED3
LED4
Overvoltage /lower voltage protection
P1
○
●
●
○
2
Overcurrent protection
P2
○
●
○
●
3
Overvoltage protection
P3
○
●
○
○
24
Discharge over temperature
protection
P4
○
○
●
●
4
Too cool protection in cooling mode
P5
-
-
-
-
32
Overheat protection in cooling mode
P6
○
○
○
●
5
Overheat protection in heating mode
P7
○
○
○
○
33
Outdoor over temperature
/ lower temperature protection
P8
-
-
-
-
31
Drive protection (software control )
P9
-
-
-
-
6
Module protection (hardware control)
P0
-
-
-
-
1
Model different
PA
●
●
○
○
-
Water full protect
D3
●
○
○
◎
-

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12
There is a LED on outdoor power board, it blinks 1s ON and 1s OFF while compressor standby and
it always light (ON) while compressor running; If there is failure happened on ODU, The indicator (LED)
alerts the fault in a cycle as such that it is bright for 0.5 seconds, dark for 0.5 seconds, blinks “n” times
and then dark for 3 seconds. For details as table below.
Display on outdoor power source board:
blink time (n)
Failure
1
IPM protection
2
Over voltage /lower voltage
3
Overcurrent
4
Exhaust over temperature protection
5
Outdoor coil over temperature protection
6
Drive fault and protection (V1，VP1)
7
Communication fault with indoor unit
8
Compressor overheat fault (compressor top switch)
9
Short-circuit / open-circuit fault of outdoor temperature sensor
10
Short circuit / open-circuit fault of outdoor heat exchanger temperature
sensor
11
Short-circuit / open-circuit fault of exhaust temperature sensor
12
Voltage sensor fault
13
Current sensor fault
14
IPM fault
15
Communication fault between power source board and IPM
16
No feedback from DC fan motor(outdoor unit)
17
Defrost state

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6. Wiring diagram
INDOOR UNIT:
Wall split type:
Cassette, Duct type:

Air Conditioner Service Manual
14
OUTDOOR UNIT
ONE TO 2 TYPE:
ONE TO 3TYPE:

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15
ONE TO 4 TYPE

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16
7. Explosion view and parts
WALL SPLIT TYPE: TACM-09HRIA/EW, TACM-12HRIA/EW
INDOOR UNIT:
14
13 12
11
10
9
8
76
54
3
2
1
151617
20
19
18
21 22
23 24 25 26
272829

Air Conditioner Service Manual
17
Parts List
Wall split type- TACM-09HRIA/EW
No.
Part No.
Part Name
Q’ty
Remark
1
1080030021
Installation Plate
1
2
210737661G
Base
1
3
210701883
Vertical Vane Assembly
2
4
210738167
Left Vertical Vane Connector
1
5
210737671
Vane
1
6
210737666
Cross Fan
1
7
1070100010
Bearing Mount
1
8
211236178G
Evaporator
1
9
210737669
Face Frame
1
10
210701846
Screw Cover
1
11
210703004
Air Filter
2
12
1070250120
Display PCB Box
1
13
1090250119AQ
Display PCB
1
14
210738178C
Front Panel
1
15
210737654
Electrical Box Cover
1
16
210736912
Cable Clamp
1
17
210900478A
Terminal
1
18
210900333
Indoor Sensor Assembly
1
19
210901628
Main PCB
1
20
210736831
Electrical Box
1
21
1170030067G
Indoor Motor
1
22
210737665
Indoor Motor Cover
1
23
210738168
Right Vertical Vane connector
1
24
210737668
Step Motor connector
1
25
210900129
Step Motor
1
26
210738225
Step Motor Supporter
1
27
210737091
Drainage Hose
1
28
1170020011
Vane Motor
1
29
210736813
In And Out Pipe Fixer
1
30
210901521B
Remote Controller
1
Not shown in Explosion view
31
1190540002ACW
Indoor Carton
1
32
211363352
Left Foaming
1
33
211363353
Right Foaming
1

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18
Wall split type- TACM-12HRIA/EW
No.
Part No.
Part Name
Q’ty
Remark
1
1080030021
Installation Plate
1
2
210737661G
Base
1
3
210701883
Vertical Vane Assembly
2
4
210738167
Left Vertical Vane Connector
1
5
210737671
Vane
1
6
210737666
Cross Fan
1
7
1070100010
Bearing Mount
1
8
211236178G
Evaporator
1
9
210737669
Face Frame
1
10
210701846
Screw Cover
1
11
210703004
Air Filter
2
12
1070250120
Display PCB Box
1
13
1090250119AQ
Display PCB
1
14
210738178C
Front Panel
1
15
210737654
Electrical Box Cover
1
16
210900478A
Terminal
1
17
210736912
Cable Clamp
1
18
210900333
Indoor Sensor Assembly
1
19
210901628A
Main PCB
1
20
210736831
Electrical Box
1
21
1170030067G
Indoor Motor
1
22
210737665
Indoor Motor Cover
1
23
210738168
Right Vertical Vane connector
1
24
210737668
Step Motor connector
1
25
210900129
Step Motor
1
26
210738225
Step Motor Supporter
1
27
210737091
Drainage Hose
1
28
210736813
In And Out Pipe Fixer
1
29
1170020011
Vane Motor
1
30
210901521B
Remote Controller
1
Not shown in Explosion view
31
1190540002ACX
Indoor Carton
1
32
211363352
Left Foaming
1
33
211363353
Right Foaming
1

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19
WALL SPLIT TYPE: TACM-09HRIA/E1, TACM-12HRIA/E1
INDOOR UNIT:
24
20
22
18
17
16
15
14
13 12
11
10 98
7
6
543
2
1
21
19
23