TCL TCC-09C2HRH/DV User manual

TCL Air Conditioner Service Manual
1
Inverter air conditioner
Service Manual
Models：
TCC-09C2HRH/DV
TCC-12C2HRH/DV
TCC-18C2HRH/DV

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CONTENTS
Part Ⅰ Technical Information…………………………………...….…………3
1. Important Notice……………………………………………………….………..…………..3
2. The Production Dimensions………………………………………………….…..……….3
3. Refrigeration cycle diagram……………………………………………………………….5
4. Electric Diagram……………………………………………………………….…….……....6
4.1 Wiring Diagram…………………………………………………………………………………….….……..…... 6
5. Electronic Controller Introduction…………………………………….……….…….…..8
5.1 Remote controller…………………………………………….…………………….……………..........………. 8
5.2 Electronic controller…………………………………….………………….……………………....…..………..9
5.3 WIFI introduction……………………………………………….……………..…..…..…….…………….……..16
.
PART Ⅱ Installation and Maintenance……………..…….……….……….17
1. Notes for installation and maintenance.………………..……………………..……….17
2. Installation…………………………………………………………………………..……….24
2.1 Location Selection……………………………………………………....….…………..……....................…..24
2.2 Indoor Unit Installation …………………………………………………………………..………...….……….25
2.3 Outdoor Unit Installation…………………………………………………………..……………………………29
2.4 Drainage Pipe Installation……………………………..……………………….…….……….………….……30
2.5 Drainage Test……………………………………..…….………………….…….……………...….…….........34
2.6 Refrigerant Pipe Installation…………………..….………………….….….……….….……………………..35
2.7 Vacuum Drying and Leakage Detection……………...……….………….……..……….….……………….39
2.8 Additional Refrigerant Charge…………………………………………………….…………………………..40
2.9 Engineering of Insulation…………………………………………………….………………………………..40
2.9 Electricity and wiring…………………………………………………….……………………………………..41
3. Maintenance………………………………………………………..…………….………….42
3.1 Failure code………………………………………………………………………….…….……….…………….42
3.2 Trouble shooting…………………………………………………….…………….………..……….…..……….44
4. Exploded View………………………………………….…………….…………..…………64
APPENDIX……………..…………………………….…………….…………..………………..69

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Part ⅠTechnical Information
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.
2. Product Dimensions
Indoor Unit:
Outline dimension
Air outlet opening size
Air return opening
size
A
B
C
D
E
F
G
H
09K
700
600
212
510
33
45
70
615
12K
700
200
469
46
511
18
595
170
18K
920
200
469
46
731
18
815
170
Outdoor Unit:

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Model
Outdoor unit
D
E
F
G
H
I
J
K
TCC-09C2HRH/DV
712
498
234
415
291
225
48.5
52
TCC-12C2HRH/DV
712
498
234
415
291
225
48.5
52
TCC-18C2HRH/DV
780
605
290
516
349
314
54
63

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3. Refrigeration cycle diagram
Heat pump
9K,12K,18K
Liquid side
2-way valve
Gas side
3-way valve
Compressor
4-way valve
Muffler
Muffler
Heat exchange
(Condenser)
Heat exchange
(Evaporator)
Check valve
Cooling
Heating
Capillary
24K
Liquid side
2-way valve
Gas side
3-way valve
Compressor
4-way valve
Muffler
Muffler
Heat exchange
(Condenser)
Heat exchange
(Evaporator)
Electronic
expansion valve
Cooling
Heating

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4. Electric Diagram
4.1 Wiring diagram
INDOOR UNIT：
MODEL： TCC-09C2HRH/DV，TCC-12C2HRH/DV，TCC-18C2HRH/DV
INDOOR WIRING DIAGRAM
CN16
WI-FI
CN8B
DISPLAY
CN6 ROOM TEMPERATURE
CN5-2
DC FAN MOTOR
PCB
SWING MOTOR 2
CN5-1
SWING MOTOR 1
(OPTIONAL PART)
CN9
(OPTIONAL PART)
θPIPE TEMPERATURE
81102-015585
GND
A
B
12V
G
A
B
+
REMITE MONITOR
θ
CN12 POSITION SWITCH
SWING MOTOR 2
P0
L
N
1
EVAPORATOR
ELECTRICAL BOX
ACL
ACN
PS1
L
N
1
OUTDOOR
UNIT
BK(WH)
BU
BN
GNYE
BK
BU
BN
GNYE
GNYE
GNYE
OUTDOOR UNIT：
MODEL： TCC-09C2HRH/DV，TCC-12C2HRH/DV
θ
θ
θ

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7
MODEL：TCC-18C2HRH/DV
PCB
θ
EEV
θ
θ

8
5.1 Remote controller
Air Conditioner Service Manual
5. Operation Details
Note :
If the remote controller is cooling only, you can press MODE button for 5 seconds when the remote
controller off.
If the unit display fahrenheit degree, you can press TURBO button for 5 seconds change to centigrade
degree.
3
4
2
1
9
5
67
8
10
9
9
1
2
4
3
5
6
10
7
MODE button
ECO button
FAN SPEED button
TEMP UP button
TEMP DOWN button
To select the mode of operation.
Press this button to activate/deactivate the ECO function.
To switch the conditioner on and off.
To select the fan speed of auto/mute/low/mid-low/mid
/mid-high/high/turbo , cycle as below.
Increase the temperature or time by 0.5 unit.
Decrease the temperature or time by 0.5 unit.
8
Press this button to activate/deactivate the Super
function which enables the unit to reach the preset
temperature in the shortest time.
SWING button
To activate the swing of horizontal flap(up/down) or
deactivate it.
CLEAN button
ON/OFF button
TURBO button
9
SWING button
To activate the swing of vertical flap(left/right) or
deactivate it.
9
10
To active this function, press CLEAN button at the same
time, until hear a beep from indoor unit.Only optional for
heating pump inverter appliance.
11
12
13
14
15
16
17
DISPLAY button
Press DISPLAY button to switch off the LED display on
the panel. Press again to switch on the LED display.
I FEEL button
To switch - activr/deactive I FEEL function. The air
conditioner will regulate the room temperature base on the
temperature around the remote controller.This function will
terminate 2 hours later once it's active.
HEALTH button
To switch - on /off HEALTHY funtion. It is a button
which controls the ionizer or negative generator only
for inverter type.
ANTI-MILDEW button
Press this button to activate/deactivate the ANTI-MILDEW
function.
SLEEP button
To activate the function SLEEP .
10
9
11
10
9
12
10
9
13
10
9
14 TIMER button
To set automatic switching-on/off.
10
9
15
9
16 MUTE button
To activate the function of Mute.
9
17

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Remote controller DISPLAY
Meaning of symbols on the liquid crystal display.
1
or or AUTO
FEEL mode indicator
2
or COOL
COOLING indicator
3
or or DRY
DEHUMIDIFYING indicator
4
or FAN
FAN ONLY OPERATION indicator
5
or HEAT
HEATING indicator
6
or
SIGNAL RECEPTION indicator
7
or or or
TIMER OFF indicator
8
or or or or
TIMER ON indicator
9
or or or
AUTO FAN indicator
10
or or or or or
LOW FAN SPEED indicator
11
or or or or or
MIDDLE FAN SPEED indicator
12
or or or or
HIGH FAN SPEED indicator
13
or or or
SLEEP indicator
14
COMFORTABLE SLEEP indicator
(optional)
15
FEEL indicator(optional)
16
or or or
FLAP SWING indicator
17
FLAP and Deflectors SWING
indicator
18
or TURBO or POWERFUL
SUPER indicator
19
or or
HEALTHY indicator
20
or ECO or
ECO indicator
21
ANTI-MILDEW indicator
22
or or
BATTERY indicator
23
CLOCK indicator
24
Mute indicator
25
GEN
GEN function indicator
26
Comfortable cooling airflow
indicator
27
Comfortable heating airflow
indicator
28
Optional functions indicator

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5.2 Electronic controller
RT-------Room Temperature.
IPT------Indoor Pipe (Coil) Temperature.
ST------Indoor Setting Temperature.
OPT---Outdoor Pipe Temperature.
OAT---Outdoor Ambient Temperature.
ODT---Outdoor Discharge Temperature.
CRT---Compensated Room Temperature.
IDU--- Indoor unit
ODU---Outdoor unit.
Note: When AC finishing installation, because of the air ventilation and the distance of temperature test
sensor to different location of the house, the temperature for IDU PCB control need compensation.
1. Cooling mode. CRT=RT;
2. Heating mode. CRT=RT-3℃-----Split AC.
5.2.1 Auto mode
1. The set temperature can be adjusted from 16-31℃ on auto mode, the operation of fan speed and vane
position according to preset.
2. Operation
When unit set to auto mode, it will work on cooling, heating or fan mode totally according to Δt --the
temperature difference between RT and ST shown as table:
Mode
Δt=RT-ST
COOLING
Δt >1℃
FAN
-1℃≤Δt≤1℃
HEATING
Δt <-1℃
5.2.2 Cooling mode
1. Temperature control :16-31℃, and the operation of fan speed and vane position according to preset.
2. Compressor and process control
1). When RT-ST≥0.5℃, the compressor starts up working, AC operates as customer preset;
2). When
a. RT-ST≤－3℃ and compressor keeps 2 min continuously; or
b. RT-ST≤－2℃ and compressor works in lowest frequency for 5 min continuously; or
c. RT-ST≤－1℃ and compressor works in lowest frequency for 10 min continuously,
The compressor stops operation.
3). The compressor frequency control: Based on relation of RT & ST, and the changing speed of RT.
4). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
5). Under normal operation, the compressor can be stopped by program only working after 7 min once it
starts up.
6). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next
procedure.
3. ODU Fan motor control:
1). While unit:
a. switched off.
b. under protection.

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c. to the set temperature.
After compressor ceased, the fan motor stops working according to the temperature of OPT and OAT,
the max delay for the motor should be less than 160s.
2). When switch on unit on cooling mode, ODU fan motor will delay 5s after compressor starts up.
4. When ODU failure or stops for protection, IDU works as preset.
5. Anti-frosting protection
Control the unit operation frequency and the frequency changing rate to achieve anti-frosting
protection.
1). Frequency Slowly Increasing(FSI):
a. If 6℃≤IPT＜7℃, the frequency increasing rate is 1Hz/60s, slowly increasing operation speed.
b. When IPT≥7℃, unit quit from protection.
2). Frequency Limitation:
If 5℃≤IPT＜6℃, the compressor frequency forbidden to increase
3). Normal Frequency Decreasing (NFD):
If 3℃≤IPT＜4℃, the frequency decreasing rate is 8Hz/90s, until to the lower frequency limit.
4). Fast Frequency Decreasing (FFD):
If 2℃≤IPT＜3℃, the frequency decreasing rate is 16Hz/90s, until to the lower frequency limit.
5). Unit stop:
a. When IPT＜1℃for 3min continuously, unit stops working for anti-defrosting protection.
b. While IPT＞6℃, and the unit stopped for 3 min already, can the unit recover to operation.
0℃
-1℃
-2℃
-3℃
RT-ST
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
160S
160S
10min.
5min. 2min.
ON OFF
5s
0.5℃
≥ 7min.
≥3min.
5.2.3 Dry mode
1. Temperature control: 16~31℃.
Fan speed: low
Vane blade position: as customer preset
2. When ODU failure or stops for protection, IDU works as preset.
3. Failure protection: as cooling mode.
4. Energy saving and sleep mode: Invalid.
5. ODU Fan motor stops working.
5.2.4 Heating mode
1. Temperature control: 16-31℃.
2. Compressor and process control.
1). When ST-CRT≥0.5℃, the compressor starts up working, AC operates as customer preset;;
2). When

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a. ST-CRT≤－3℃ and compressor keeps 2 min continuously; or
b. ST-CRT≤－2℃ and compressor works in lowest frequency for 5 min continuously; or
c. RT-CRT≤－1℃ and compressor works in lowest frequency for 10 min continuously,
The compressor stops operation.
3). The compressor frequency control: Based on relation of RT & ST, and the changing speed of RT.
4). The compressor will also stop working while unit:
a. switched off.
b. under protection.
c. changed to fan mode.
5). Under normal operation, the compressor can be stopped by program only working after 7 min once it
starts up.
6). In the process of unit operation, once the compressor ceased, it should be 3 min delay for the next
procedure.
3. IDU time delay: When compressor stops or unit switches off while in heating mode, IDU fan motor will
work for a few seconds more to prevent overheat.
4: ODU Fan motor control:
1). While unit:
a. To be switched off
b. Under protection.
c. To the set temperature
After compressor ceased, the fan motor stops working according to the temperature of OPT and OAT,
the max delay for the motor should be less than 160s.
2). When switch on unit on heating mode, ODU fan motor will delay 5s after compressor starts up
3). in the process of defrosting, the fan motor will stop operation 48s delay after compressor stopped.
4). defrosting finish, the compressor stops operation, the fan motor will start working simultaneously.
5. 4-way valve control
1). On Cooling/Dry/Fan mode,4-way valve: OFF, when unit switched on heating mode,4-way valve: ON.
2). When heating mode switched off, or changed from heating to other modes, the 4-way valve will be OFF
2 min delay after the compressor stops working.
3). Unit stops working caused by any kind of protection, the 4-way valve will be OFF 4 min delay.
4). In the process of defrosting, 4-way valve will be OFF 43s delay after compressor stopped.
5). When defrosting finish, the compressor stops operation, 4-way valve will be ON after 43s delay.
0 ℃
-1℃
-2℃
-3℃
ST-CRT
COMPRESSOR
OUTDOOR FAN
INDOOR FAN
2 min.
10 min.
5min.
≥ 7min.
160S
160S
≥3min.
4-way VALVE
5s
ON OFF
0.5℃
≤2min. ≤2min.
6. Defrost
Note: t1: compressor continuous works time.
t2: AC unit operation first time going to defrost circle.
t3: compressor accumulated working time (when OPT≤3 ℃ unit starts to count the time for t3).

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When AC unit working to:
a. t1≥t2, or
b. t3≤t1＜t2.
and also the temperature (related to OAT & OPT) tested 3 min continuously meets for defrosting.
1) Defrosting start up: Compressor stops working, and re-starts to working after 50s delay;
2) Conditions for quitting defrosting
a. After defrosting 60s, and OAT≥12℃; or
b. OAT＜－5℃, and OPT ≥8℃ for 80s continuously; or
c. The defrosting for 10 min.
When AC meet any of condition a, b or c, defrosting finish.
COMPRESSOR
ON
OUTDOOR FAN
4-way VALVE
OFF
50S 50S
43S
48S Defrosting max time
43s
3) Defrosting end off: Compressor stops working, and re-starts to working after 50s delay;
7. Cold air prevention:
This function intends to prevent cold air from being discharged when the heating operation starts up
1). IDU fan motor cold air prevention
①.When RT＜24℃:
a. If ITP＞31℃while compressor works for 5 min, fan motor will work according to preset fan speed.
b. If IPT≤31℃, fan motor stops working while compressor operation within 2min, if IPT≥27℃, fan motor
works in low speed 2 min, then change to preset speed.
②When RT≥24℃:
a. Within 2 min after compressor start up working, once IPT＞27℃, fan motor will change to preset
speed.
b. After compressor starts working 2 min, fan motor change to preset speed directly.
2). Vane blade operation for cold air prevention.
a. If the vane works on status of non-swing: While IPT increase to a special degree, the vane blade will
change the position to:
①Default angle; or
②Previous position; or
③Customer preset.
The above operation can work one time only, when compressor stops working, the unit will once again
inspect the function.
b. If the vane works on swing: When IDU quits from cold air prevention, vane operate as preset.
8. “8℃” Heating
When function effective, it will make sure the room temperature not lower than 8℃, unit works on heating
mode.
5.2.5 Fan mode
1. The temperature setting: 16~31℃,
Fan speed and vane position: as preset. The function for remote controller 58E only.
2. For above function, when unit preset to be auto fan mode, the fan motor will change its operation
speed based on the temperature difference of ambient and preset temperature.

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3. ODU always OFF.
5.2.6 Timer
The unit has times control, when the unit meet the timer preset, it will be switched on or off automatically.
1. TIMER ON
1). TIMER ON can be set only when the air conditioner is OFF.
2). Press TIMER on the remote control ONCE to enter time setting.
3). Press “▲” or “▼” to set the time for unit to start working.
4). Set other function as MODE, FAN SPEED, SWING etc.
5). Press TIMER ONCE AGAIN to confirm the TIME ON setting
2. TIMER OFF
1). TIMER OFF can be set only when the air conditioner is ON.
2). Press TIMER on the remote control ONCE to enter time setting.
3). Press “▲” or “▼” to set the time for unit to stop working.
4). Press TIMER ONCE AGAIN to confirm the TIME OFF setting
Note: In case of no selection for the time setting within 10s, the timer function will be OFF automatically.
5.2.7 Sleeping mode
While AC works in sleeping mode, the light of POWER SUPPLY and SLEEP always ON, and the
temperature display will be OFF after 15s.
In this mode, the AC unit works according to the SLEEP CURVE as designed.
Sleeping mode the unit can work 10 hours continuously, after that it will quit from this mode and work as
previous presetting.
5.2.8 Emergency switch
When the EMERGENCY switch is pressed one time, COOLING mode is selected and if it pressed again
within 3s, HEATING mode selected, while press once again, the unit will be switched off.
When the remote controller out of function, batteries lost power, for example, the EMERGENCY button
in the front of indoor unit can be used for function test.
NOTE: Do not press the EMERGEMCY switch during normal operation.
5.2.9 Auto-restart function
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.
Note: The function setting:
Within 3 min while power on unit, set the unit on cooling mode, set temperature 30℃, and mid fan speed,
press the ECO button 10 times within 8s, the AUTO-RESTART will be activated.
℃
4
2
0
δt comes down
δt goes up
High fan
Mid fan
Low fan
2℃
4℃

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5.2.10 Protection
5.2.10.1 Overload protection
1. Overload protection for Cooling or Dry mode
1). if:
a. OPT≥62℃, unit stops working for overload protection.
b. OPT＜55℃, after compressor stopped for 3 min, can the unit be started to operate.
2). When OPT≥55℃, the compressor will be frequency limited/reduced for over load protection.
3). If unit have 6 times of over load stop-working protection continuously, this protection can’t be recovered
unless press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of over
load stop-working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, on fan
mode or changed to be heating mode from others.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
2. Overload protection for Heating mode
1). If:
a. IPT≥62℃, unit stops working for overload protection.
b. IPT＜55℃, after compressor stopped for 3 min, can the unit be started to operate.
2). When IPT≥55℃, the compressor will be frequency limited/reduced for over load protection.
3). If unit have 6 times of over load stop-working protection continuously, this protection can’t be recovered
unless press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of over
load stop-working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, on fan
mode or changed to be heating mode from others.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
5.2.10.2 The compressor discharge temperature protection
1. If ODT≥115℃, unit stops working for over temperature protection;
While ODT＜100℃, & after compressor stopped for 3 min, the unit can be started to operate.
2. If ODT≥100℃, the compressor will be frequency limited/reduced for over temperature protection.
3. If unit have 6 times of discharge over temperature stop working protection continuously, this
protection can’t be recovered unless press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of
discharge over temperature stop working protection will be reset to zero and start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, or
changed to fan mode.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
5.2.10.3 The current protection
1. If the unit A/C working current more than Limited current (ILC), the compressor will be frequency limited /
reduced for over current protection.
2. When unit A/C working current more than Stopped current (ISC), AC unit stops working. Only when the
compressor stops for 3 min can the unit be recovered operation.
3. If unit have 6 times of over current stop-working protection continuously, this protection can’t be
recovered unless press ON/OFF button.
In the process of unit operation, once the compressor runs continuously more than 6 min, the counter of
stop-working protection will be reset to zero and re-start a new counting process.
Note: For different models, ILC and ISC have different programmed value.

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16
5.2.10.4 IPM overheating protection
1. When IPM temperature TIPM≥87℃, the compressor will be frequency limited / reduced for IPM over
temperature protection.
2. When TIPM≥95℃, the AC unit stops working for AC system protection.
If TIPM＜87℃,and after compressor stopped for 3 min, can the unit be started to operate.
3. If unit have 6 times of IPM over temperature stop working protection continuously, this protection can’t
be recovered unless press ON/OFF button, and unit will show failure code.
In the process of operation, once the compressor runs continuously more than 6 min, the counter of over
load stop working protection will be reset to zero and re-start a new counting process.
The failure and times for protection will eliminate immediately once the unit to be switched off, or
changed to fan mode.
Note: If the defective failure can’t be recovered, the failure can’t eliminate even if operation mode changed.
5.2.11 Complementary
5.2.11.1 Energy saving (ECO)
Function effective on Cooling and Heating mode only.
On cooling mode, the set temperature range from 26℃ to 31℃,on heating mode, from 16℃ to 25℃.
5.2.11.2 TURBO
Function effective on Cooling, Heating, Fan and Auto modes, and fan speed operates on highest.
5.2.11.3 The communication control
If ODU PCB can’t get signal feedback from IDU for 2 min continuously, AC unit stops working and shows E0
error code as IDU/ODU communication failure.
Once the IDU & ODU communication recovery, and also the compressor stopped for 3 min already, can the
unit be recovered to operate.
5.3WIFI OPERATION MAUAL
5.3.1 The WIFI control logic
IDU PCB
IDU WIFI
module
Home
wireless
router
TCL
CLOUD
Internet
controller
TCL AC
APP
Remote
controller
ODU

TCL Air Conditioner Service Manual
17
PART ⅡInstallation and Maintenance
1. Notes for installation and maintenance
Safety Precautions
Important!
Please read the safety of precautions carefully before installation and maintenance. The following contents
are very important for installation and maintenance. Please follow the instructions bellow.
●The installation or maintenance must accord with the instructions.
●Comply with all national electrical codes and local electrical codes.
●Pay attention to the warnings and cautions in this manual.
●All installation and maintenance shall be performed by distributor or qualified person.
●All electric work must be performed by licensed technician according to local regulations and instructions
given in this manual.
●Be caution during installation and maintenance. Prohibit incorrect operation to prevent electric shock,
casualty and other accidents.
Warnings
Electrical safety Precautions.
1) Cut off the power supply of air conditioner before checking and maintenance.
2) The air conditioner must apply specialized circuit and prohibit share the same circuit with other appliances.
3) The air conditioner should be installed in suitable location and ensure the power plug is touchable.
4) Make sure each wiring terminal is connected firmly during installation and maintenance.
5) Have the unit adequately grounded. The grounding wire can’t be used for other purposes.
6) Must apply protective accessories such as protective boards, cable-cross loop and wire clip.
7) The live wire, neutral wire and grounding wire of power supply must be corresponding to the live wire,
neutral wire and grounding wire of the air conditioner.
8) The power cord and power connection wires can’t be pressed by hard objects.
9) If power cord or connection wire is broken, it must be replaced by qualified person.
10) If the power cord or connection wire is not long enough, please get the specialized power cord or
connection wire from the manufacture or distributor. Prohibit prolong the wire by yourself.
11) For the air conditioner without plug, an air switch must be installed in the circuit. The air switch should be
all-pole parting and the contact parting distance should be more then 3mm.
12) Make sure all wires and pipes are connected properly and the valves are opened before energizing.
13) Check if there is electric leakage on the unit body. If yes, please eliminate the electric leakage.
14) Replace the fuse with a new one of the same specification if it is burnt down, don’t replace it with a cooper
wire or conducting wire.
15) If the unit is to be installed in a humid place, the circuit breaker must be installed.
Installation Safety Precaution
1) Select the installation location according to the requirement of this manual. (See the requirements in
installation part).
2) Handle unit transportation with care, the unit should not be carried by only one person if it is more than
20kg.
3) When installing the indoor unit and outdoor unit, a sufficient fixing bolt must be installed, make sure the
installation supporter is firm.
4) Ware safety belt if the height of working is above 2m.
5) Use equipped components or appointed components during installation.
6) Make sure no foreign objects are left in the unit after finishing installation.

TCL Air Conditioner Service Manual
18
Improper installation may lead to fire hazard, explosion, electric shock or injury.
Safety precautions for Installing and Relocating the unit.
To ensure safety, please be mindful of the following precautions.
Warnings
1) When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances
other than the specified refrigerant.
Any presence of air or other foreign substance in the refrigerant circuit will cause system pressure rise or
compressor rupture, resulting in injury.
2) When installing or moving this unit, do not charge the refrigerant which is not comply with that on the
nameplate or unqualified refrigerant.
Otherwise, it may cause abnormal operation, wrong action, mechanical malfunction or even series safety
accident.
3) When refrigerant needs to be recovered during relocating or repairing the unit, be sure that the unit is
running in cooling mode. Then, fully close the valve at high pressure side (two-way valve). About 30-40
seconds later, fully close the valve at low pressure side (3-way valve), immediately stop the unit and
disconnect power. Please note that the time for refrigerant recover should not exceed 1 minute.
If refrigerant recovery takes too much time, may be cause compressor overheat, resulting in injury.
4) During refrigerant recovery, make sure that two-way valve and 3-way valve are fully closed and power
is disconnected before detaching the connecting pipe.
If compressor starts running when the valves is open and connecting pipe is not yet connected, air will be
sucked in and cause pressure rise and then compressor overheat or gas leak, resulting in injury.
5) When installing the unit, make sure that connecting pipe is securely connected before the compressor
starts running.
If compressor starts running when the valves is open and connecting pipe is not yet connected, air will be
sucked in and cause pressure rise and then compressor overheat or gas leak, resulting in injury.
6) Prohibit installing the unit at the place where there may be leaked corrosive gas or flammable gas.
If there leaked gas around the unit, it may cause explosion and other accidents.
7) Do not use extension cords for electrical connections. If the electric wire is not long enough, please
contact a local service center authorized and ask for a proper electric wire.
Poor connection may lead to electric shock or fire.
8) Use the specified types of wires for electrical connections between the indoor and outdoor units. Firmly
clamp the wires so that their terminals receive no external stresses.
Electric wires with insufficient capacity, wrong wire connections and insecure wire terminals may
cause electric shock or fire.
Introduction R32, R290 air conditioner installation
1) Introduction to Refrigerants R32 & R290
The refrigerants used for air conditioners are environmentally friendly hydrocarbons R32 and R290.
The two kinds of refrigerants are combustible and odorless. Moreover, they can burn and explode under
certain condition. However, there will be no risk of burning and explosion if you comply with the following
table to install your air conditioner in a room with an appropriate area and use it correctly.
Compared with ordinary refrigerants, Refrigerants R32 & R290 are environmentally friendly and do
not destroy the ozone sphere and that their values of greenhouse effect are also very low.

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19
2) R32/R290 air conditioner installation area requirement
m1=(4m3)×LFL, m2=(26m3) ×LFL, m3=(130m3) ×LFL
Where LFL is the lower flammable limit in kg/m3, R290 LFL is 0.038kg/m3, R32 LFL is 0.306kg/m3.
For the appliances with a charge amount m1<M<m2:
The maximum charge in a room shall be in accordance with the flowing: Mmax=2.5×(LFL)(5/4) ×h0×A1/2
The required minimum floor area Amin to install an appliance with refrigerant charge M(kg) shall be in
accordance with following: Amin= (M/ (2.5 x (LFL)(5/4) x h0)) 2
Where:
Mmax is the allowable maximum charge in a room, in kg;
M is the refrigerant charge amount in appliance, in kg;
Amin is the required minimum room area, in m2;
A is the room area, in m2;
LFL is the lower flammable limit, in kg/m3;
h0 is the installation height of the appliance, in meters for calculating Mmax or Amin, 1.8 m for wall
mounted; Table GG.1 - Maximum charge (kg)
Category
LFL
(kg/m3)
h0
(m)
Floor area (m2)
Maximum charge (kg)
4
7
10
15
20
30
50
R290
0.038
0.6
0.05
0.07
0.08
0.1
0.11
0.14
0.18
1
0.08
0.11
0.03
0.06
0.09
0.2
0.3
1.8
0.15
0.2
0.24
0.29
0.34
0.41
0.53
2.2
0.18
0.24
0.29
0.36
0.41
0.51
0.65
R32
0.306
0.6
0.68
0.9
1.08
1.32
1.53
1.87
2.41
1
1.14
1.51
1.8
2.2
2.54
3.12
4.02
1.8
2.05
2.71
3.24
3.97
4.58
5.61
7.254
2.2
2.5
3.31
3.96
4.85
5.6
6.86
8.85
Table GG.2 - Minimum room area (m2)
Category
LFL
(kg/m3)
h0
(m)
Charge amount (M) (kg)
Minimum room area (m2)
R290
0.038
0.152kg
0.228kg
0.304kg
0.456kg
0.608kg
0.76kg
0.988kg
0.6
/
82
146
328
584
912
1514
1
/
30
53
118
210
328
555
1.8
/
9
16
36
65
101
171
2.2
/
6
11
24
43
68
115
R32
0.306
1.224kg
1.836kg
2.448kg
3.672kg
4.896kg
6.12kg
7.956kg
0.6
/
29
51
116
206
321
543
1
/
10
19
42
74
116
196
1.8
/
3
6
13
23
36
60
2.2
/
2
4
9
15
24
40
Caution:
Please contact the nearest after-sale service center when maintenance is necessary. At the time
of maintenance, the maintenance personnel must strictly comply with the Operation Manual
provided by the corresponding manufacturer and any non-professional is prohibited to maintain
the air conditioner.
It is necessary to comply with the provisions of gas-related national laws and regulations.
It is necessary to clear away the refrigerant in the system when maintaining or scrapping an air
conditioner.

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20
When filling the combustible refrigerant, any of your rude operations may cause serious injury or
injuries to human body or bodies and object or objects.
A leak test must be done after the installation is completed.
It is a must to do the safety inspection before maintaining or repairing an air conditioner using
combustible refrigerant in order to ensure that the fire risk is reduced to minimum.
3) Installation Safety
Installation Safety Principles
Site Safety
Open Flames Prohibited Ventilation Necessary
Operation Safety
Open Flames Prohibited
Mind Static Electricity Must wear protective clothing and anti-static gloves Don`t use mobile phone
Installation Safety
Caution:
The installation should be in a well-ventilated condition location.
When you installing or maintaining an air conditioner using Refrigerant R32/R290, the location
should be free fire from open or any other goods temperature higher than 370℃ for R290/548℃for
R32 which easily produces open fire include welding, smoking, drying oven.
When installing an air conditioner of R32/R290, it is necessary to take appropriate anti-static
measures such as wear anti-static clothing and gloves.
It is necessary to choose the location for installation or maintenance where in the air inlets and
outlets of the indoor and outdoor units should be not surrounded by obstacles or close to any heat
source or combustible and/or explosive environment.
If the indoor unit suffers refrigerant leak during the installation, it is necessary to immediately turn
off the valve of the outdoor unit and all the personnel should go out till the refrigerant leaks
completely for 15 minutes. If the product is damaged, it is a must to carry such damaged product
back to the maintenance station and it is prohibited to weld the refrigerant pipe or conduct other
operations on the user’s site.
It is necessary to choose the place where the inlet and outlet air of the indoor unit is even.
It is necessary to avoid the places where there are other electrical products, power switch plugs
and sockets, kitchen cabinet, bed, sofa and other valuables right under the lines on two sides of the
indoor unit.
Refrigerant Leak Detector
Appropriate Installation
Location
The left picture is the schematic diagram of a refrigerant leak
detector.