Haier AP24DF1HRA User manual

Packaged Type
DC Inverter
AP24DF1HRAModel No.
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
Repair the product or products dealt with in this service information by anyone else could result in serious injury or death
WARNING
2017 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group
Version V1 Date 2017-02-22
SERVICE MANUAL

Table fo contents
Domestic air conditioner
Contents
1. Introduction............................................................................................ 1
2. Features ................................................................................................ 7
3. Specifications ........................................................................................ 8
4. Sensors list............................................................................................ 9
5. Piping diagrams.....................................................................................10
6. Printed Circuit Board Connector Wiring Diagram..................................11
7. Functions and Control ...........................................................................
8. System configuration.............................................................................
9. Dimensional drawings ...........................................................................
10. Conter of gravity ..................................................................................
11. Service Diagnosis................................................................................
12. Circuit diagrams ..................................................................................
14
59
43
42
42
25

Intuoduction
Domestic air conditioner
1 Introduction
1.1 Model name explanation
A P 2 4 D F 1 H R A
Indoor unit
Type of indoor unit: P (packaged type)
Nominal cooling capacity (24000BTU/h)
Version number
R410A refrigerant
DC inverter
Apply toT1; 220~240V50HZ/1ph
1
Platform of indoor units: Cabinet
72N Platform
Heat pump &

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Domestic air conditioner 
1.2 Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important
since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead
to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety
caution items described below.
About the pictograms
Ƹ This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
żThis symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
ƔThis symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates
Normally, and explain the cautions for operating the product to the customer.
1.2.1 Caution in Repair
Warning
Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for
a repair.
Working on the equipment that is connected to a power supply can cause an electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not
touch any electrically charged sections of the equipment.
If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas .The
refrigerant gas can cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the welded section, release the
refrigerant gas completely at a well-ventilated place first.
If there is a gas remaining inside the compressor , the refrigerant gas or refrigerating machine oil
discharges when the pipe is disconnected, and it can cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate
toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work . A charged capacitor can
cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug.
Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or
fire.
2

Intuoduction
Domestic air conditioner
Warning
Do not repair the electrical components with wet hands . Working on the equipment with wet hands can
cause an electrical shock
Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical
shock.
Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid
electrical shock .
Be sure to turn off the power switch and unplug the power cable when cleaning the equipment. The
internal fan rotates at a high speed, and cause injury.
Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor.
Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting
repair work. Working on the unit when the refrigerating cycle section is hot can cause burns.
Use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen
deficiency.
1.2.2 Cautions Regarding Products after Repair
Warning
Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to
conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can
cause an electrical shock, excessive heat generation or fire.
When relocating the equipment, make sure that the new installation site has sufficient strength to
withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation work is not conducted
securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard installation frame.
Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting
in injury.
For
integral
units only
Be sure to install the product securely at the place where the body can be supported sufficiently .
If the unit is not securely mounted, it can fall and cause injury.
For
integral
units only
3

Intuoduction
Domestic air conditioner
Warning
Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to
the electrical equipment, the internal wiring regulations and the instruction manual for installation when
conducting electrical work.
Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor units. Make the
connections securely and route the cable properly so that there is no force pulling the cable at the
connection terminals.
Improper connections can cause excessive heat generation or fire.
When connecting the cable between the indoor and outdoor units, make sure that the terminal cover
does not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause an electrical shock,
excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire. Placing heavy items on the
power cable, and heating or pulling the power cable can damage the cable.
Do not mix air or gas other than the specified refrigerant (R-410A / R22) in the refrigerant system.
If air enters the refrigerating system, an excessively high pressure results, causing equipment damage
and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the refrigerant. After
charging refrigerant, make sure that there is no refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to perform pump-down and
close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas
itself is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters,
stoves and ranges.
.
When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent
children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
4

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Domestic air conditioner 
Caution
Installation of a leakage breaker is necessary in some cases depending on the conditions of the
installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of combustible gas leaks.
If a combustible gas leaks and remains around the unit, it can cause a fire.
Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not
installed properly, water can enter the room and wet the furniture and floor.
1.2.3 Inspection after Repair
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet
all the way.
If the plug has dust or loose connection, it can cause an electrical shock or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
Damaged cable and wires can cause an electrical shock, excessive heat generation or fire.
Warning
Do not use a joined power cable or extension cable, or share the same power outlet with other electrical
appliances since it can cause an electrical shock, excessive heat generation or fire.
5

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Domestic air conditioner 
Caution
Check to see if the parts and wires are mounted and connected properly, and if the connections at the
soldered or crimped terminals are secure. Improper installation and connections can cause excessive
heat generation, fire or an electrical shock.
If the installation platform or frame has corroded, replace it. Corroded installation platform or frame can
cause the unit to fall, resulting in injury.
Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can
cause an electrical shock.
Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M
ohm or higher.
Faulty insulation can cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage can cause the water to enter the room and wet the furniture and floor.
1.2.4 Using Icons
Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in
the table below:
1.2.5 Using Icons List
Icon Type of Information Description
Note Note
A “note” provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
Caution Caution
A “caution” is used when there is danger that the reader, through
incorrect manipulation, may damage equipment, loose data, get
an
unexpected result or has to restart (part of) a procedure.
Warning Warning
A “warning” is used when there is danger of personal injury.
Reference
A “reference” guides the reader to other places in this binder or in
this manual, where he/she will find additional information on a
specific topic.
6

Specifications
Domestic air conditioner
2.Features
7
Super quiet: Lower noise operation condition
DIY auto mode: Adjust the last fixed operation mode automatically.
Auto restart: Automatic return to previous operation conditions after sudden power blackout
Double 8 display:The display is Double 8 mode.
Confortable sleep˖The setting temperature and the indoor noise can be adjusted to a more comfortable
level when you set the “sleep mode” during night sleep.
4 Fan setting :Select the fan speed LOW,MED,HI,AUTO
24 hours timer: Use the timer function to set on,or off,or from on to off,or from off to on.
3D air flow: The 3D airflow is able to deliver the airflow horizontally and vertically.
Child lock: Avoid the child's wrong operation on the remote controller
Smart Operation: The air conditioner can judge the indoor temperature and humidity and make the
adjustment accordingly
Power mode: Quick cooling or heating

Specifications
Domestic air conditioner
3 Specifications
NOMINAL DISTRIBUTION SYSTEM VOLTAGE
1/esahP
05zHycneuqerF
032VegatloV
NOMINAL CAPACITY and NOMINAL INPUT
cooling heating
Capacity rated
KW 7.2 9.0
Btu/h 24572
WaR(noitpmusnoCrewoP K)det
01.40.7W/WPOCS/REES
hWKnoitpmusnocygrenelaunnA 360 1921
h/³mlavomeRerutsioM 4.25*10 ³
TECHNICAL SPECIFICATIONS
407×377×1810mmD*W*HsnoisnemiD
555×525×1935mmD*W*HsnoisnemiDdegakcaP
34GK/thgieW
45GK/thgiewssorG
etihW//roloC
Sound level
Sound
peessure(high) dB
Sound power(high) dB(A)
8
-
60
06.2 73.2
60
47 47
30715

Specifications
Domestic air conditioner
TECHNICAL SPECIFICATIONS-PARTS
cooling heating
Fan
nafwolfssorCepyT
5252WtuptuorotoM
Air flow rate(high) m³/h 1200 12000
018548mpr)hgih(deepS
Heat exchanger
Type ML fin- 7HI-HX tube
4.1*05*2hctif*egats*
hgiRlortnocnoitceridriA t,Left,Horizontal,Downward
Air filter
Removable/Washable/Mildew Proof
Temperature control
Microcomputer Control
HB15-RYledomrellortnocetomeR
Note: the data are based on the conditions shown in the table below
htgnelgnipiPgnitaehgnilooc
Indoor: 32 DB/23 WB
Outdoor: 43 DB/26 WB
Indoor:20 DB
Outdoor: 2 DB/1 WB 5m
4 Sensors list
type Description Qty
1erutarepmetmoorgnitcetedrofdesustIrosnesmooR
Pipe sensor Its used for detecting temperature of evaporator 1
Conversation formulae
Kcal/h= KW×860
Btu/h= KW×3414
cfm=m³/min×35.3
9
/-℃WB
Row

Piping diagrams
Domestic air conditioner
5ˊPinping diagrams
10
electrical expansion valve
electrical expansion valve

Connector Wiring diagrams
Domestic air conditioner
6. Printed Circuit Board Connector Wiring Diagram
11
Connectors
PCB(1) (Control PCB)
daolhtiwtcennoC
rotcennocBCPseires
1 CN17 Connector for power N
2 CN21 Connector for power L
3 CN35
Connector for communication with outdoor
4 CN2’ CN4 CN5
CN8 CN13
Connector for
5CN9
6 CN6
7 CN11
8CN23
9 CN3
Connector for anion generator
Connector for display board
Connector for
step motor
Connector for heat exchanger thermistor and Room temperature thermistor
Connector for photoelectric switch
fan motor

Connector Wiring diagrams
PCB(1)

Connector Wiring diagrams
Wiring diagrams
Domestic air conditioner
13
COMPUTER BOARD
FAN MOTOR
FUSE
0010543924A
Up guide motor
Up vertical
Down guide motor
Y/G:Yellow
BL:Blue
BR:Brown
GR:Gray
B:Black
W:White
R:Red
NOTES:
Horizontal
CN54
CN55
TO OUTDOOR UNIT
TERMINAL
CN35
CN17
CN21
CN18
CN22
Down vertical
INDOOR WIRING DIAGRAM
/Grown
★What in dotted box are
reserved function
Control
board WIFI MODULE
Ambient temp
pipe temp
sensor
sensor
moter
moter moter
Anion brush
Remove PM2.5
generator
Anion
①
Module
CN6 CN9
CN4 CN8 CN13
CN2’
CN5
Y/G
CN11
CN33 CN34
CN3
T3.15A/250V~
CON
R
BR
BL
Y/G

Functions and Control
Domestic air conditioner
7.Funcitions and Control
7.1 Main functions and control specification
7.1.1 Automatic operation
When the running mode is turned to automation after starting the system, the system will first determine the
running mode according to the current room temperature and then will run according to the determined mode.
Tr in the following selection conditions means room temperature, Ts means setting temperature, Tp means
temperature of indoor coil pipe
Tr＞Ts-3ćChoose Cooling Mode
Tr Choose Heating Mode
After turning to the automation mode, the running mode can be switched between cooling mode, fan mode
and heating mode according to the change of the indoor ambient temperature. But the automatic conversion
between cooling mode and heating mode must be conducted after 15 minutes.
7.1.2 Cooling operation mode
Temperature control range: 16ć---30ć
Temperature difference: ±1ć
* Control features: When Tr˄input airflow˅>Ts˄set temperature˅ć, the compressor will be opened, the indoor
fan will operate at the set speed．When Tr˄input airflow˅Ts˄set temperature˅ć, the compressor will be
Airflow speed control: (temperature difference 1ć)
Automatic:
14
<

Ts-3ć
be closed and the outdoor fan will not operate. After the compressor stops to operate, if the Tr＞Ts, the
will will be opened and the outdoor fan begin to operate.
The air conditioner unit select the fan speed (High, Medium, Low) automatically according to the
change of the indoor ambient temperature.
Manus: When the system is operating, you can set the high, medium or low speed manually.
Compressor control: When the temperature of the indoor coil is too low, the compressor will be stopped.
When the temperature of the indoor coil is raised, the compressor will be restarted again.
* timing system on/off function.
*sleep function.
*health function.
*fresh function.
The above 4 functions are available under cooling operation mode.
compressor

Domestic Air Conditioner
7.1.3 Demoisture mode.
* temperature control range: 16-30 ć
* temperature difference: ±1ć
Control feature: send the demoisture signal to the outdoor system.
When Tr>Ts+2ć, the compressor will be turned on, the indoor fan will operate at the set speed.
When Tr is between the Ts and Ts+2ć, the outdoor system will operate at the high demoisture
frequency for 10 minutes and then at the low demoisture mode for six minutes. The indoor fan will
operate at low speed.
When Tr< Ts, the outsystem will be stopped, the indoor fan will be stopped for 3 minutes and then
turned to the low speed option.
All the frequency converses have a ±1ćdifference.
* Wind speed control: Automatic:
When Tr >= Ts+ 5ć, high speed.
When Ts+3 Tr< Ts+5ć, medium speed.
When Tr< Ts+3ćˈ low speed.
When Trćˈ indoor fan stopped .
7.1.4 Heating operation mode.
*temperature control range: 16---30ć
* temperature difference: ±1ć
* control feature: the temperature compensation is automatically added and the system will send the
heating signals to the outdoor system.
If Tr<Ts, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode.
If Tr>Ts, the outdoor system is turned off, the indoor fan will operate 30s at low speed and then
After the compressor stops running for 3 minutes,
and the indoor fan will be at the cold air proof mode.
15
Functions and Control
ć
When Hs˚Hr, the outdoor system stops to operate, the indoor fan will stop after operating 30s.
Compressor control: When the temperature of the indoor coil is too low, the compressor will be stopped.
When the temperature of the indoor coil is raised, the compressor will be restarted again.
* timing system on/off function.
*sleep function.
*health function.
*fresh function.
The above 4 functions are available under cooling operation mode.
If Tr<Ts, the outdoor compressor
stop running.
will be turned on again,

Functions and Control
Domestic air conditioner
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr Ts-5ć, high speed.
When Ts-5ć＜ TrTs-3 , medium speed.
When Tr> Ts-3 ć, low speed.
*Coldair proof operation
7.1.5 Power/Quiet operation
The system enters the “Power”mode after receiving the ‘power signal’.
Send strength operation signal to the outdoor system.
After enter into this operation mode, fan speed automatically takes high speed of auto fan speed.
The system enters the “Quiet”mode after receiving the quiet signal’.
After enter into this operation mode, fan speed automatically takes low speed of auto fan speed.
16
Airflow speed control: (temperature difference 1ć)

ć
About 4 minutes after the start up of the compressor, If the indoor heat interaction temperature is too low,
the indoor fan will stopped running or run at low speed.After the temperature of the indoor coil is raised, the
indoor fan will operate as per the setted airflow speed.
After turning off the temperature sensor or during the heating operation (except defrosting) , the indoor fan
will run at low speed for 30s and then stop running.
* Heating overload protection
During the running of the compressor( the running time is more than 60s), if the temperature of the indoor
coil is too high or the system is overload, the outdoor system will stop operating.
*Defrosting
If the outdoor unit appears too much frosting and influence the outlet air temperature during the heating
process, the air conditioner unit will exit from the heating operation mode and defrosting for few minutes.
After defrosting is finished, the unit will exit from the defrosting mode and enter into heating mode again.
* timing system on/off function.
*sleep function.
*health function.
*fresh function.
The above 4 functions are available under cooling operation mode.

Functions and Control
Domestic air conditioner
17
7.1.6 Timing
You can set 24 hours’ on/off timing accordingly. After the setting, the timing indicator will be lightened. Also,
the light will be turning off after the timing is finished. The followings are several timing methods.
1.system /on timing: The timing indicator will be lightened and the indoor system is under the waiting mode.
The light will be turned off when the timing is finished and the rest of the system will operate under a normal
condition. The timing starts since the last reception of the timing signal.
2.system /off timing: When the system is turned on, the timing indicator is lightened, the rest of the system
will operated under a normal condition. When set time comes, the indicator light will be turned off and the
system will be turned off.
3 .system /on and off timing: The settings will be completed according to the orders..
7.1.7 Comfortable sleep operation
Before going to bed, you can simply press the SLEEP button and unit will operate in SLEEP mode and bring you
a sound sleep.
Operation mode
.
Approx. 6hrs
Rises 1º
C
Rises 1º
C
Temp. setting
In COOL, DRY mode
Unit stop
1 hr
1 hr
SLEEP
operation starts
SLEEP
operation stops
2. In HEAT mode
1 hours after SLEEP mode starts, temp will become
2 ºC lower than temp. setting. After another 1 hours,
temp decrease by 2 ºC further. After more another
3 hours, temp. rises by 1 ºC further. The unit will run for
further
3 hours then stops. Temp. is lower than temp. setting
so that room temperature won’t be too high for your
sleep.
Temp. setting
Decreases 2 º
C
Decreases 2 º
C
Unit stop
Rises 1 º
C
In HEAT mode
1hr
1hr
3hrs
3hrs
SLEEP
operation starts
SLEEP
operation stops
1. In COOL, DRY mode
1 hours after SLEEP mode
starts, temp. will become 1 ºC
higher than temp. setting. After
another 1 hours, temp. rises by
1 ºC further. The unit will run for
further 6 hours then stops Temp.
is higher than temp. setting so
that room temperature won’t be
too low for your sleep.
3. In SMART mode
The unit operates in corresponding sleep mode, which adapted to the automatically selected operation mode.
4. When quiet sleeping function is set to 8 hours the quiet sleeping time can not be adjusted. When TIMER
function is set, the quiet sleeping function can’t be set up.After the sleeping function is set up, if user resets
timer function the sleeping function will be cancelled;
if the two modes are set up at the same time, either
automatically , and the other mode will be cancelled.
of their operation time is ended first, the unit will stop
the machine will be in the state of timing-on,

Functions and Control
Domestic air conditioner
7.1.8
18
Power Saving Operation
Automatic adjusting with the environmental temjperature, running with powe saving.
1, Available operation mode: Heating, Cooling, Dehumidifying.
2, Control features: After the power saving is set, the host machine will judge the temperature difference between
setted temperature and indoor room temperature and unit running time. The unit will adjust the set temperature
according to the judgement.
After the power saving is set, the host machine will automatically adjust the setting temperature,
and automatically control the switch of the compressor,which may be inconsistent with the user’s
setting.The power saving function is more effective after the air conditioning has been running for a long time
(more than 2 hours)
After cancelling the power saving function, the unit will restore the original setting temperature and fan speed.
7.1.9 Power cut compensation
* Entering condition: Press dormant button 10 times within 5 seconds, the buzzer will ring 4 times and the
present system status will be stored into the EEPROM of the indoor system.
* After entering the power cut compensation mode, the processing of the indoor system should be as the
followings:
Remote control urgency signal: operate according to the remote control and the urgent conditions, the
present status will be stored into the EEPROM of the indoor system.
* Quitting conditions: Press dormant button 10 times within 5 seconds and the buzzer will ring twice.
7.1.10 Test run:
After the host machine received the signal from the control board, test run operation begins,and compressor
starts (but subject to the limit of 3-minute delay excluding the first time),During the test run, the operation
mode of the unit if cooling operation and the indoor fan will run with high speed.
.