TCL TFC-24HRA User manual

TCL
FLOOR-STANDING SPLIT-TYPE AIR CONDITIONERS
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SERVICE MANUAL No.20180321
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Models
TFC-24HRA/TOC-24HNA
TFC-48HRA/TOC-48HSA
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CONTENTS
1. IMPORTANT NOTICE
2. PRODUCT DIMENSIONS
3. REFRIGERATION CYCLE DIAGRAM
4. OPERATION DETAILS
5. WIRING DIAGRAM
6. EXPLOSION VIEW AND PART LISTS
7. PRECAUTION
8. NAMES OF PARTS
9. INSTALLATION
10. TROUBLE SHOOTING

Air Conditioner Service Manual
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1. IMPORTANTNOTICE
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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 parameters are subject to change due
to
technical modification or improvement without any prior notice. The
accurate specifications are presented on the nameplate label.
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How to order spare parts
To have your order filled promptly and correctly, please furnish the
following information:
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Model No. with Indoor or Outdoor
7
Part No. in the Explosion View
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Part Name
9
The quantity you ordered

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2.PRODUCT DIMENSIONS
Indoor Unit:
Outdoor Unit:
Model Indoor unit
Outdoor unit
A
B
C
D
E
F
G
H
I
J
K
TFC
-24HRA
480
330
1740
900
650
307
623
399
349
65
63
TFC-48HRA
540
420
1780
940
1250
340
600
400
375
50
63
Indoor unit
Outdoor unit
TFC

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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

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Note: Each mode and relevant function will be further specified in following pages.
Remote controller
Air Conditioner Service Manual
4.Operation Details
Remote Control
The remote controller is not presetting 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 type depending on the air conditioner type you have purchased as
follows:
Press any button when the arrowhead flashes on the front of Cool , Cooling Only is set.
Press any button when the arrowhead flashes on the front of 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.
9
9
1
2
4
3
5
6
10
7
MODE button
ECO button
FAN SPEED button
TEMP UP button
TIMER button
SLEEP button
TEMP DOWN button
To select the mode of operation.
In cooling mode,press this button ,the temperature
will increase 2 on the base of setting temperature:
In heating mode, press this button, the temperature
will decrease 2 on the base of setting temperature.
To switch the conditioner on and off.
To select the fan speed of auto/low/mid/high.
To set automatic switching-on/off.
Increase the temperature or time by 1 unit.
To activate the function SLEEP .
Decrease the temperature or time by 1 unit.
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DISPLAY button
In cooling mode, press this button, the unit will give
the maximum cooling temperature with 16
In heating mode, press this button, the unit will give
the maximum heating temperature with 31 .
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SWING button
11
To activate or deactivate of the movement of the
DEFLECTORS .
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HEALTH button
To switch - on /off HEALTHY funtion.
It is a button
which controls the ionizer or plasma generator only
for inverter type.
ON/OFF button
12
To LED display (if present)switch on/off the
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4
2
1
9
5
67
8
10
11
12
ECO
13
TURBO button
9
SWING button
To activate or deactivate of the movement of the
DEFLECTORS .
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Electronic controller
NOTES:
RT-------Room Temperature.
IPT------Indoor Pipe Temperature.
ST------indoor Setting Temperature.
OPT---Outdoor Pipe Temperature.
CRT---Compensated Room Temperature
1. Automatic mode
1) The initial RT determines A/C working mode and the setting temperature (ST), the mode is
determined effective only once unless A/C shut-down and then re-started. If from other mode
switches to automatic mode (including mode conversion after shutdown), it should be that the
compress stop more than 3 min then temperature judgment and automatic mode are conducted (it
can conduct immediately from fan mode switched to automatic, the indoor fan stops, three minutes
later the response is made and start up). Within 3 min, the output as: Showing the room
temperature, indoor fans starts (or anti-cold airflow), the outdoor fan stops;
With auto re-start controller, once being turned off or in case of an accidently power cut, the
A/C is able to retain and restore the original mode when being turned on or the power supply
is resumed, if the autorestart function activated. power-off after power-on; while if the auto
restart function isn’t activated, the A/C enters standby state.
Heat pump
Mode Initial RT Initial ST
Cooling RT≥26°C 23°C
Dry 26°C＞RT≥20°C 7°C
Heating RT＜20°C 23°C
Cooling-only
Mode Initial RT Initial ST
Cooling RT≥26°C 23°C
Dry 26°C＞RT≥20°C 7°C
Ventilating RT＜20°C －
Under automatic mode (including from automatic converted into Dry mode), when A/C received the
temperature UP or DOWN signals from the remote controller, the setting temperature (ST)
adjusts
correspondingly to the current room temperature plus or minus 1°C, the automatic regulating
temperature range is ± 2°C.
2. Cooling mode
1) The control of the compressor
a. When RT－ST≥1°C，the compressor is running.
b. When RT－ST＜－1°C，the compressor stops.
c. When－1°C≤RT－ST＜1°C, the compressor keeps its original state.
2) Outdoor fan motor and the compressor run simultaneously (except for defrosting).
3) The control of indoor fan motor:
a. Indoor fan motor can operate by automatic, low, middle, or high airflow speed circularly.

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b. Indoor fan motor automatic airflow speed control, it works as shown in Figure 1:
Hi
Mid
Lo
RT－ST 1°C 2°C 4°C
Figure 1 Cooling automatic airflow
When the temperature changing leads the fan speed variation, the switch can only be made orderly,
and in every grade of air flow speed should run 1 minute at least.
3. Dry mode
While select to this mode, the air conditioner operates for 3 minutes according to cooling mode firstly
(ST set at 7°C), and then takes the detected backflow air temperature minus 2°C as a new set
temperature (the lowest temperature: 5°C) and runs according to cooling mode, indoor fan operates at
low-speed, at this moment the setting operation of fan speed invalid but Swing adjustable.
4. Heating mode
On the Heating mode, the room temperature (RT) is compensated (CRT), after that, the room
temperature displayed on the LED is CRT=RT-3°C.
1) The control of the compressor
a. When ST－CRT≥1°C，the compressor is running.
b. When ST－CRT＜-1°C，the compressor stops.
c. When -1°C≤ST－CRT＜1°C, the compressor keeps its original state
2) Outdoor fan motor and the compressor run simultaneously (except for defrosting)
3) The control of indoor fan motor:
a. Indoor fan motor can operate by automatic, low, middle, or high airflow speed circularly.
b. Indoor fan motor automatic airflow speed control, it works as shown in Figure 2:
Figure 2 Heat automatic airflow
When the temperature changing leads the fan speed variation, the switch can only be made orderly,
and every grade of air flow speed should run 1 minute at least.
4) Vane motor control: run as set state.
5) 4-way valve control:
a. Under heating mode, the four-way valve maintains well-connected status (including the
compressor stops on set condition, except for the defrosting process)
b. When the mode switches into the heating mode or A/C start-up, four-way valves will open 5
Seconds before the compressor starts; while the mode exits from the heating mode or A/C turn off,
the four-way valve will close 2min later after shut-down the compressor.
Hi
Mid
Lo
ST－CRT 1°C 2°C 4°C

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6) Defro
During de
buzzer an
defrosting
During de
Fan spee
Except th
buzz for r
During de
Defrosting
Option 1
The cond
Condition
Definition
The follow
a. IPT1 s
b. t5≥50m
be less th
c. IPT＜4
Running i
defrosting
Condition
accumula
under con
Condition
less than
temperatu
and the m
osting functio
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nd display w
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：with jump
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wing conditio
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Figure 3
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Running into defrosting under condition 3, defrosting time set is 10 min.
a) Running into the first defrosting in 20 min after start-up.
b) The interval from last defrosting equivalent to or more than 50 min (stopping the compressor or the
machine in standby is allowed in the meantime).
Option 2: Without Jumper JC, and no OPT outdoor sensor
when the compressor runs for 45 min (accumulated), if the indoor coil temperature is less than 40°C for
2 min, the machine runs into defrosting, and lasts for 3min, otherwise when the compressor
runs for 120 min (accumulated), the machine runs into defrosting automatically and last for 10 min.
Option 3: Without jumper JC, but with OPT outdoor sensor
While heating, when the temperature of condenser is lower than E °C (-4°C), and the compressor runs
for 45 min (accumulated), then the machine runs into defrosting and lasts for 10 min.
Option 4. On heating, while the outdoor fan motor stopped but the compressor operated
accumulative totally 30min, then the machine runs into defrosting and last for 8 min. if the accumulative
totally less than 30min, but accord with one of the condition option 1-3 then the machine runs into
defrosting at the option 1-3 and the accumulative total time restarts from 0.
Conditions for quitting defrosting
(1) The quitting conditions for option 1, option 2 and 4, the machine quits from defrosting if any one
below condition met.
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a. Defrosting time is over.
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b. When it runs in defrosting for three minutes, the IPT indoor coil temperature rises 15°C or above
from the bottom point.
(2) The quitting conditions for option 3.
When OPT ≥20°C or defrosting for more than 10 min, then quit from defrosting.
(3) Defrosting process shown in Figure 4
Figure 4 Defrosting process
7) Auxiliary electric heating function (optional)
(1) The default condition is automatic on/off the electric heating function.
(2) The conditions of auxiliary electric heating works (all the following conditions must be met)
a. the compressor runs for more than 3min；
b. indoor fan runs normally；
c. not in defrosting state;
Compressor Relay
ON
OFF ON
ON
OFF
OFF
ON
ON
ON
OFF
39S 19S 5S
t
4-way Valve
Outdoor Fan
The indoor fan runs in anti-cold wind modle
Defrosting time MAX 12 Min
ON

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d. auxiliary electric heating is turned off for more than 30s。
e. ST-RT≥0°C;
f. RT﹤25°C;
g. IPT≤43°C;
(3) The conditions of stopping auxiliary electric heating(any one of the following conditions met, the
state stops)
a. the compressor stops
b. RT≥27°C;
c. IPT≥50°C
d. indoor fan stops。
e. running into sleeping function
5. Fan mode
1) Indoor fan motor is running at setting speed (the speed same as heating mode).
2) Vane motor control: running according to the setting condition.
3) The outdoor unit doesn’t work under fan mode.
6. Sleeping mode
1) Under sleep mode, the indoor fan motor running at low speed, except the power light and sleep
light are ON, timer lights ON/OFF according to the setting state, running light OFF. LED will be OFF
after displaying 30S.
2) Temperature control:
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(1) While changing from Cool mode to Sleep mode, one hour later, the operation Temp.=ST＋1°C，
another one hour later, the operation Temp.=ST＋2°C，after then the temperature has no changed
anymore.
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(2) When changing from Heating mode to Sleep mode, one hour later, the operation Temp.= ST-1°C,
another one hour later, the operation Temp.=ST-2°C,after then no changed anymore.
3) The machine will automatically shut up after running 10 hours under sleep mode.
When Timer ON and Sleep mode are implemented at the same time, the Sleep mode can not be
functioned.
7. Timer function
The timer can preset between 10min to 24h, when the time set less than “10” hours, the displayed
time shown by 0.5 hour as the unit, when the time set more than or equal to “10” hours, the
displayed time shown by 1 hour as the unit.
8. Emergency switch (ON/OFF)
1) When stand-by, to operate by pressing the emergency switch as follows:
Press the emergency switch within 3 seconds, release emergency switch while the buzzer rings once,
the machine goes into Cooling mode. If the buzzer rings twice while release emergency switch,
Heating mode is selected. To press the Emergency switch while A/C is on, the buzzer rings once and
then A/C will shut down.
2) The machine runs mandatorily as selected mode within 30min when Emergency operated,
meanwhile indoor fan motor runs in high-speed, and stepping vane swinging as well. 30min later
the A/C goes into automatic mode under the same operation manner, the set temperature to be
23°C, and the rotate speed of indoor fan motor automatic control, stepping vane swinging all the way.
3) To press the emergency button when the A/C goes on operation, then the machine runs into
stand-by.