Haier D Series User manual

Domestic air conditioner
SERVICE MANAUL
Wall Mounted Type
D
-
Series
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
2016 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Haier Group Version˖V1 Date˖2016-11-02
AS09DCAHRA
AS12DCAHRA
AS20S2SD1FA
AS25S2SD1FA
AS35S2SD1FA
AS42S2SD1FA
Model No.

Table fo contents
Domestic air conditioner
Contents
1.Introduction .......................................................................................... 1
2.Features............................................................................................... 7
3.Specifications ..................................................................................... 11
4.Sensors list......................................................................................... 12
5.Pinping diagrams................................................................................ 13
6.Printed Circuit Board Connector Wiring Diagram ................................ 14
7.Functions and Control ........................................................................ 18
8.Dimensional drawings ........................................................................ 36
9.Center of gravity................................................................................. 36
10.Service Diagnosis............................................................................. 37
11.Circuit diagrams................................................................................ 52

Intuoduction
1 Domestic air conditioner
1.Introduction
1.1 Model name explanation
A S 0 9 D C A H R A
Indoor unit
Type of indoor unit: S (wall-mounted)
Nominal cooling capacity (9000BTU/h)
Platform of indoor units:D(D platform)
Platform of indoor units:40 Platform
Version number
Heat pump & R32 refrigerant
DC inverter
Apply toT1; 220~240V50HZ/1ph
A S 1 2 D C A H R A
Indoor unit
Type of indoor unit: S (wall-mounted)
Nominal cooling capacity (12000BTU/h)
Platform of indoor units: D (D platform)
Platform of indoor units:40 Platform
Version number
Heat pump & R32 refrigerant
DC inverter
Apply toT1; 220~240V50HZ/1ph

Intuoduction
2 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.
○This symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
●This 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.

Intuoduction
3 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 in the installation frame mounted on a window frame.
If the unit is not securely mounted, it can fall and cause injury.
For
integral
units only

Intuoduction
4 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.

Intuoduction
5 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.

Intuoduction
6 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.

Features
7 Domestic air conditioner
2.Features
Wi-Fi control:Control your air conditioning system with smart phone or tablet which can connect internet.
Human sensor:Automatically adjust operation frequency and modes to save energy,improve comfort and
convenience by monitoring human location,movements,absence with 2 human activity sensors.
Light sensor:Sensor control,light sensor can offer comfort and save energy.
on-off card:Control the system with a room card in the remote place through the level signal.It is widely
adopted in the building,hotel or other commercial space.Convenient form management.
Wired controller transfer kit:The indoor unit connect the wired controller by wired controller transfer kit.
Super quiet:Optimize the noise control technology,such as frequency adjustment,fan speed control and air
flue design decreasing noise level lowest to 15 dB(A)DŽ
Comfortable 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.
Long distance air supplying:The indoor units is improved by the optimized motor,fan and air duct so as to
provide long distance airflow with 20m+ maximum.
3D air flow: The 3D airflow is able to deliver the airflow horizontally and vertically.
Intelligent air:Airflow automatically upward when cooling or downward when heating to spread air
automatically throughout the large room while without blowing directly to human body.
Auto horizontal airflow:With two special step motors to adjust the vertical flaps moving horizontally and
automatically,they can realize 5 positions with different directions to offer more comfort airflow.
Auto horizontal airflow: With one special step motor to adjust the vertical flaps moving horizontally and

Features
8 Domestic air conditioner
automatically,it can realize 5 positions with the same directions to offer more comfort airflow.
Auto vertical airflow: With one special step motor to adjust the horizontal flaps moving vertically and
automaticallyˈit can realize 5 positions air angle,2 intelligent air angle and total auto blowing, when the unit is
switched off, the flap will close automatically.
DIY auto mode˖You can set a temperature value, with which the unit can adjust the operation mode
automatically.
Quiet mode˖Just press the button “turbo/quiet” on the remote controller, the air conditioner will work in
quiet mode.
Precise temp control 0.5°C˖Can make the setting temperature by 0.5°C so to achieve more precise
comfort and energy saving.
Nano-aqua: Haier unique Aqua generator can ionize water molecules into H+ and O2- as well as small
cluster of water , which can keep your skin moist and have the effect of air purification.
Evaporator self-cleaning: With a new-generation hydrophilic foil, when the air conditioner in cooling or
drying mode, the dust on evaporator will be taken away by condensed water flowing rapidly.
Exquisite filter: Effectively prevent the smaller dust articles,insects and other materials coming into the
room.
DRY function: When the unit working in dry mode, it can adjust the indoor fan motor speed automatically
according to the temperature gap between setting temperature and room temperature so as to get mild
dehumidification or strong dehumidification.
Original 3D-cant lifting panel:The panel could be lifted up when power on and move back when power off.
Integrative structure design: The optimized design integrates the bottom base, drain pan and frame casing
together so as to level up product reliability and lower vibration.
Integrative valve cover: This valve cover is designed to cover both wiring terminal block and stop valves so

Features
9 Domestic air conditioner
as to enhance protect effect with nice design.
2-way piping design: The indoor unit offers the possibility of left or right piping direction.
Easy clean design: The indoor front panel is easy to wash and the air flaps are easy to detach without any
special tools for quick cleaning.
Blue fin: The hydrophilic aluminum foil makes condensing water flow smoothly so guarantee the better
performance with anti-corrosion effect.
A-PAM DC inverter: A-PAM inverter technology is the upgrade of 180°sine wave inverter , it adopts additional
momental control to decrease the vibration in the low compressor frequency and also contribute to great energy
saving.
-30°C heating: A special design for heating in cold winter even at -30°C with rotary compressor,DC
motor,optimized bottom plate,electric heating wire and special defrosting programme etc.
-20°C cooling: Special design for heating even at lowest ambient temperature -15°C with high frequency
rotary compressor,optimized refrigerant system and special defrosting programme etc.
10°C heating maintenance: It is possible to set the system to switch on when indoor temp. drop below
10°C,thus avoiding pipes frozen , and provide winter protection for unoccupied summer house,garages and
basements.
Wide voltage for inverter: The inverter unit can start up from 150V and operate in a wide voltage range from
150V-264V.
Auto restart: The function permits automatic return to previous operation conditions after a sudden power
break.
Electrical deicer: The outdoor bottom plate is equipped with a special designed electrical heating wire to
deicer in the cold winter.
24 hours timer˖Use the timer function to set on, or off, or from on to off, or from off to on etc, within 24 hours.

Features
10 Domestic air conditioner
DC motor˖DC motor ensures more reliable operation with much higher energy saving and lower noise.
Warm start˖when the unit start working at heating mode,or change from cooling mode to heating mode,the
unit will not blow or blow at super low speed in order to avoid cold air disturbance.
Long life reliable PCB˖Haier PCB is tested 96 hours under hard enviroment temperature 85ć& moisture
85%, this test condition is more or less 10 years under normal condition.
Smart defrosting˖Haier smart defrost process is only performed when needed which reduces energy waste
by eliminating the unneeded defrosting process.Enjoy maximum comfort in heating operation by reducing defrosting.
Indoor 5 steps fan speed: The indoor can be remote controlled with 5 steps of fan
peed:powerful/high/middle/low/quiet, which offer more choice for you to get comfort airflow.
3 minutes protection: The 3 minutes protection of the compressor can avoid some damages to it and makes
the compressor have a longer life.
Consealed LED display: Special designed panel and LED display which make it possible to show the
working states and functions only when the unit on while the display and frame can not be seen when unit off in order
to keep indoor decoration with sense of wholeness. Of course you can cancel the display whenever you want.
Self-diagnosis: The LED display of the indoor units will show the error code in order to make service more
easier.

Specifications
11 Domestic air conditioner
3.Specifications
NOMINAL DISTRIBUTION SYSTEM VOLTAGE
Phase / 1
Frequency Hz 50
Voltage V 230

NOMINAL CAPACITY and NOMINAL INPUT
Cooling(09K/12K) heating(09K/12K)
Capacity rated
KW 2.60/3.50 2.60/4.20
Btu/h 8870/11940 8870/14330
Power Consumption(Rated) KW 0.65/0.87 0.64/1.05
SEER/SCOP W/W 8.5/A+++
5.1/A+++(09K)
4.6/A++(12K)
Annual energy consumption KWh 107/144 716/973
Moisture Removal m³/h 1.2*10ε嘓/1.6*10ε嘓

TECHNICAL SPECIFICATIONS
Dimensions H*W*D mm 980×212×318
Packaged Dimensions H*W*D mm 1059×289×407
Weight / KG 11.8
Gross weight / KG 15.2
Color / / White
Sound level
Sound pressure(high/medium/low)
dB 34/29/25/15(09K)
35/30/26/16(12K)
Sound power dB 54/56

Specifications
12 Domestic air conditioner
TECHNICAL SPECIFICATIONS-PARTS
cooling(09K/12K) heating(09K/12K)
Fan
Type Cross flow fan
Motor output W 45 45
Air flow rate(high) m³/h 650/700 650/700
Speed(super/high/low) rpm 1100/1000/600 1050/900/600
Heat exchanger
Type ML fin-¶7HI-HX tube
Segment *stage*fitch 3*16*1.4
Air direction control Right,Left,Horizontal,Downward
Air filter Removable/Washable/Mildew Proof
Temperature control Microcomputer Control
Remote controller model YR-HQ01
Note: the data are based on the conditions shown in the table below
cooling heating Piping length
Indoor: 27 DB/19 WBćć
Outdoor: 35 DB/24 WBćć
Indoor:20 DBć
Outdoor: 7 DB/6 WBćć 5m
4.Sensors list
type Description Qty
Room sensor Its used for detecting room temperature 1
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

Piping diagrams
Domestic air conditioner
5Pinping diagrams
3
EEV
EEV

Connector Wiring diagrams
14 Domestic air conditioner
6.Printed Circuit Board Connector Wiring Diagram
Connectors
PCB(1) (Control PCB) For AS09/12DCAHRA
series PCB connector Connect with load
1 CN21
Connector for power N and L
2 CN52
3 CN27 Connector for ground
4 CN23 Connector for communication between indoor and outdoor unit
5 CN9 Connector for fan motor
6 CON1 Connector for fresh air
7 CON2
Ion Generato
8 CON3
9 CN34 Connector for wifi-control
10 CN51 Connector for room card
11 CN6 Connector for thermistors
12 CN7 Connector for display
13 CN14 Connector for Emergency operation ON / OFF switch
14 CN11 Connector for left-right stepmotor
15 CN5 Connector for up-down stepmotor
16 CN57 Human&Light sensors control
17 CN2 Connector for wiring-control
18 CN36 Remote controller
19 CN12
Stepper motor for the panel which can go up and down
20 CN13
Note: Other designations
PCB(1) (Indoor Control PCB)
1) SW1 Connector for Emergency operation ON / OFF switch
2) SW2 1 Select remote code A or B,
2 Select room card able or disable，
3,4 Select eeprom code 23、26、33 and 35 ,
3)RV1 Varistor
4) FUSE1 Fuse 3.15A/250VAC

Connector Wiring diagrams
15 Domestic air conditioner
OFF ON
1 A B
2 N_RC RC
3 ON ON OFF OFF
4 ON OFF ON OFF
35 33 26 23
UNIT MODEL PCB MODEL
AS09DCAHRA 0011800459 ˄26˅
AS12DCAHRA 0011800459 ˄35˅
J1 OFF OFF ON ON
J2 OFF ON OFF ON
325 317 326 488
UNIT MODEL DISPLAY MODEL
AS09DCAHRA 0011800488
AS12DCAHRA 0011800488

Connector Wiring diagrams
16 Domestic air conditioner
CN7
Ą
CN14
CN6
CN51
CN34
CN11
CN5
CN2
CN36
CN57 CN12
CN13
CN23
CN21
CON1
CON3
CN27
CN52
CON2
CN9

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17 Domestic air conditioner
Connector Wiring diagrams

Functions and control
18 Domestic air conditioner
7.Functions 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 room temperature and set temperature D-value .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˘Ts-3ćChoose 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˄room temperature˅>Ts˄set temperature˅ć , the compressor will be open, the
indoor fan will be operated at the set speed and the mode signal will be sent to the outdoor system. When Tr
˄room temperature˅<Ts˄set temperature˅ć , the compressor will be closed, the indoor fan will operate at
the set speed and the mode signal will be sent to the outdoor system. The system will keep the original status
if Tr= Ts.
Airflow speed control: (temperature difference 1ć)
Automatic: When Tr≤Ts+ 3ć, high speed.
WhenTs+1ć≤Tr<Ts+3ć, medium speed
WhenTr<Ts+1ć, low speed
Whenthesensorisoff,lowspeed
When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3
minutes (remain at high speed for 3 minutes.) before the next switch.
Manus: When the system is operating, you can set the high, medium or low speed manually. (When the
sensor is on or off, the system will change the speed 2 seconds after receiving the signal.)
*Airgate location control: the location for the airgate can be set according to your needs.
7.1.3 Dehumidification mode.
* temperature control range: 16---30ć
* temperature difference: ±1ć
Control feature: send the dehumidifying signal to the outdoor system.
When Tr>Ts+2ć, the compressor will be open, the indoor fan will be operated at the set speed.