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