Haier HSU12XHK User manual

SERVICE MANUAL
Order No.
EK-Series
© (Qingdao Haier Air Conditioner General corp.,Ltd)
All right reserved .Unauthorized copying and distribution is a violation of law
Haier Group
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
Wall mounted Type
ON/OFF
Model No.
HSU12XHK
HSU09/12XHK
HSU09XHK
HSU09/12XHK
indoor unit and remote controller
AC1205S001V0
2012
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Table of Contents
1.Introduction ...................................................................................................... 1
2.List of Functions ............................................................................................. 6
3.Specifications ................................................................................................... 7
4.Printed Circuit Board Connector Wiring Diagram
................................. 9
5.Functionsand Control ................................................................................. 10
5.1 main functions and control specifications .......................................... 10
5.2 Value of Thermistor................................................................................
6.System Configuration
.................................................................................. 24
6.1 System Configuration ............................................................................ 24
6.2 Instruction ................................................................................................ 24
7.Codesand Description ................................................................................ 32
7.1 Problem Symptoms and Measures ...................................................... 32
7.2 Error Codes and Description indoor display ....................................... 32
8.Installation Manual of Room Air Conditioner ........................................ 35
9.Removal Procedure ...................................................................................... 39
9.1 Indoor Unit............................................................................................... 39
9.1.1 Removal of Air Filter
.......................................................................... .39
9.1.2 Removal of Front Panel ..................................................................... 41
9.1.3 Removal of Horizontal Flap ............................................................... 43
9.1.4 Removal of Drain Pan ........................................................................ 44
16

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9.1.5 Removal of Vertical Blades and Swing Motor ............................... 45
9.1.6 Removal of Electrical Box
................................................................. 46
9.1.7 Removal of Heat Exchanger ............................................................. 47
9.1.8 Removal of Fan Rotor and Fan Motor ............................................ 49
9.2 Outdoor Unit
............................................................................................ 51
9.2.1 Removal of Outdoor Panel ................................................................ 51
9.2.2 Removal of Electrical Box ................................................................. 55
9.2.3 Removal of Fan and Fan Motor ....................................................... 56
9.2.4 Removal of Fan motor bractek and Exchanger
............................. 57
9.2.5 Removal of Compressor and Heat Exchanger .............................. 59
10. Appendix ...................................................................................................... 61
10.1 Piping Diagrams .................................................................................. .61
10.2 Wiring Diagrams ................................................................................. .62
10.3 Circuit Diagram ................................................................................... .66
11. Description of codingrules of unit model ......................................... .67
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HSU09/12XHK-SM Introduction
1
Domestic Air Conditioner
1. Introduction
1.1 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
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.
1.1.1 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.

HSU09/12XHK-SM Introduction
2
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
shocks.
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.
1.1.2 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

HSU09/12XHK-SM Introduction
3
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.
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.
For
integral
units only

HSU09/12XHK-SM Introduction
4
Domestic Air Conditioner
1.1.3 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.
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.

HSU09/12XHK-SM Introduction
5
Domestic Air Conditioner
1.1.4 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:
1.1.5 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.

HSU09/12XHK-SM
Category
H S U0 9XHK
H S U1 2XHK
Healthy negative ion
Child lock
Dry function
24Hour timer
Auto restart
Easy clean design
Intelligent air
Anti-m old filter
4Fansetting
Auto mode
Power mode
Soft mode
Negative ion filter
Note: Y: Holding Functions
N : No Functions
Constant temperature
dehumidification
Avoid the child's wrong operation on the remote controller
Sleep mode
Catches most small particles and remove unpleasant odors effectively.
With twin-blade technology ,the airflow can be adjusted not to blow directly
automatic return to previous operation conditions after asundden power blackout
Make dehumiditying in the room when the unit is working in the "DRY" mode.
Use the tim er function to set on,or off,or from on to off,or from off to on
The panel is easy to wash and the airflow vents can be detached easily
The setting temprature and the indoor noise can be adjusted to a more
comfortable
level when you set the "sleep mode"during night sleep
Make dehumidifying in the room while keeping the constant
temperature inside
lower noise operation condition
Generate negative ions by the filter.
Slect the fan speed LO,MED,HI,AUTO
make your room full of an abundance natural negative ions.
Functions
Quick cooling or heating
Acoording to the fixed tem perature,the unit will adjust the operation mode autom atically.
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
Y Y
N N
N N
N N
N N
N N
N N

3 Specifications
Model
HSU09XHK HSU12XHK
Cooling Heating Cooling Heating
Capacity Rated(Min.~Max.)
KW 2.64 2.78 3.51 3.51
Btu/h 9000 9500 12000 12000
kal/h 2267 2393 3023 3023
7.15.1h/LlavomeRerutsioM
Running Current(Rated A 7.1 7.5 9.5 9.7
Power Consumption Rated
(Min.~Max.) W 800 850 1080 1100
99999989%rotcaFrewoP
3.23.33.33.3W/WdetaRPOC
Piping
Connections
φ
1/4
φ
inches
diuqiL
φφsaG
φφniarD
sepiPsaGdnadiuqiLhtoBsepiPsaGdnadiuqiLhtoBnoitalusnItaeH
Refrigerant Circuit
49 1/5
feet
htgneLgnipiPtinuretni.xaM
ecnereffiDthgieHtinuretni.xaM
23
23sselegrahC
Amount of Additional Charge of
Refrigerant 0.0180.018OZ/Inches
Indoor Unit
etihWetihWroloClenaPtnorF
Air Flow Rate m³/min(cfm)
0.01/2.91.9/3.8H
8.8/0.88.7/0.7M
7.7/8.62.7/4.6L
--LS
Fan
Type Cross Flow Fan Cross Flow Fan
Motor
Output 0202W
Speed Steps 4 Step,Silent,Auto 4 Step,Silent,Auto
Air Direction Control Right,Left,Horizontal,Downward Right,Left,Horizontal,Downward
Air Filter Removable/Washable/Mildew Proof Removable/Washable/Mildew
Proof
Running Current(Rated) A 0.15 0.15 0.15 0.15
Power Consumption (Rated) w18 
Power Factor %98 99 99 99
Temperature Control Microcomputer Control Microcomputer Control
xx
10 3/7
)DxWxH(snoisnemiD
Packaged Dimensions(HxWxD)
23.2.19.4thgieW
27.624.9IbsthgieWssorC
Operation Sound H/M/ 53/93/3453/73/24ABdL
3525ABdHrewoPdnuoS
HSU09/12XHK-SM
7
inches
inches
1/4
3/8 3/8
5/8 5/8
feet
feet
49 1/5
32 4/5 32 4/5
Ibs
inches
inches
7 1/331 2/7
xx
14 1/6 1234 2/7
xx
10 3/7 7 1/3
37
xx
14 1/6 1240

HSU09/12XHK-SM
Outdoor Unit HSU09XHK HSU12XHK
etihWetihWroloCgnisaC
Compressor
Type Rotary Compressor Rotary Compressor
B182A44B132A44eldoM
5211029WtuptuOrotoM
Refrigerant oil
Model NMOC Ze-Gles RB68EP NMOC Ze-Gles
RB68EP
48.0pintsegrahC
Refrigerant a014Ra014RledoM
2.07IbsegrahC
Air Flow Rate(H/L)
m³/min 26.7 27.5 33.3 34.1
cfm 942.5 970.8 1175.5 1203.7
Fan Type Axial fiow fan Axial fiow fan
8282WtuptuOrotoM
7.95.95.71.7A)detaR(tnerruCgninnuR
Power Consumption(Rated) W 800 850 1080 1100
99999989%rotcaFrewoP
26
AtnerrucgnitratS
24 1/4 x
x)DxWxH(snoisnemiD
Packaged Dimensions(HxWxD)
thgieW 69.4
thgieWssorG
Operation Sound H/L dBA 52 52 52 52
Sound Power H dBA 62 62 62 62
Note:The dada are based on the conditions shown in the table below.
htgneLgnipiPgnitaeHgnilooC
Indoor:80.6 DB/66.2 WB
Outdoor:35 DB/24 WB
Indoor:68 DB 16 2/5 feet
Conversion Formulae
kal/h=kWx860
Btu/h=kWx3414
cfm=m³/minx35.5
20
48.0
2.92
pints
pints
inches
inches
74.5
78.3
83.3
30 5/7 9 2/3 25 1/4 x
x30 5/7 9 2/3
24 1/6 x
x36 3/5 13 2/5 28 1/9 x
x36 3/5 13 2/5
F
F
Outdoor:95 /75.2 WB
F
DBF
F
Outdoor:44.6 /42.8 WB
F
DBF

HSU09/12XHK-SM
Domestic Air Conditioner
Connecter Wring Diagram
4.Printed Circuit Board Connector Wiring Diagram
4.1 Indoor unit
Connectors Indoor PCB
1)CN1connector for transformer.
2)CN2 connector for power line.
3)CN3 connector for transformer.
4)CN5”˄1˅connector for up and down step motor.
5)CN6 connector for ambient temp. sensor and piping temp.sensor.
6)CN7 connector for receiver display.
7)CN8 connector for AC fan speed.
8)CN9 connector for AC fan motor. CN8
CN9
CN1
CN2
CN3
CN7 CN5”˄1˅
CN6
9

HSU09/12XHK-SM Functions and Control
Domestic Air Conditioner
10
5ˊFunctions and Control
5.1 main functions and control specifications
Including brief introduction to air conditioners of series models and electric control function.
5.1.1 Automatic running mode
(1) Single cold automatic run mode:
After entering into this mode, the main control “MCU” determines the corresponding work pattern
according to the indoor temperature so as to maintain the preset temperature (the preset temperature is 78°F).
When the indoor temperature is below 78°F, outlet air from compressor is off, the automatic wind from fan
motor is low, and wind can be set to high, medium or low by hand. When the indoor temperature is or above
78°F, the unit enters the cooling mode and conducts the cooling programme (the preset temperature is 78°F),
outlet air from compressor is on and indoor fan motor run in fixed wind speed.
(2) Automatic running mode
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
a. Tr≥74°F running cooling mode
b. Tr<74°F running 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.
5.1.2 Indoor temperature control
Temperature control range : 60°F ---86°F
Temperature control precision: r2°F
Compressor can’t be controlled by temperature sensor within 2 minutes after it starts
5.1.2.1 Cooling mode:
When Tr> Ts, outdoor fan motor and compressor on, and indoor fan motor run at fixed wind speed. When Tr
Ts, outdoor fan motor and compressor off, and when Tr > Ts, outdoor fan motor and compressor are working
again .If Tr=Ts, the indoor fan motor , outdoor fan motor and the compressor’s state will not change.
5.1.2.2 Heating mode:
When Tr dTs, compressor, four-ways valve and outdoor fan motor is on, indoor fan
motor runs as in cold blast avoidance mode, and 7°F of compensation is added after compressor is started.
When Tr>Ts+9°F, compressor is off, and the indoor fan motor runs as in cold blast avoidance mode.
When Tr<Ts+9°F, compressor, four-ways valve and outdoor fan motor is on, and the indoor fan motor runs
as in cold .
5.1.3 Cooling run mode:
temperature control range : 60°F ---86°F
temperature control precision: r2°F
compressor can’t be controlled by temperature sensor within 2 minutes after it starts.
control character: when Tr tTs, outlet air from compressor is on and indoor fan motor run at fixed wind

HSU09/12XHK-SM Functions and Control
Domestic Air Conditioner
11
speed. When TrTs, outlet air from compressor is off , and when Tr > Ts, outlet air from compressor is on.
wind speed control: (the temperature difference is 2°F)
auto: When Tr≥Ts+9°F, the wind speed is high;
When Ts+1°F dTrǂTs+5°F, the wind speed is medium.
When TrǂTs+1°F, the wind speed is low.
When temperature sensor is off, the fan motor runs at low speed.
when the wind speed changes from low to high, there is no delay, and when it changes from high to low,
there is a 3-minutes delay before conversion.
Manual operation:When unit is on the wind speed can be set to high, medium, low or automatic as
required (execute instruction 2 seconds later after receiving remote signal)
Compressor control喚The compressor can’t be controlled by temperature sensor within 2 minutes after
start up and can be only restarted at least 3 minutes later after shutdown. There is no 3-minute protection with
power on for the first time (over 3 minutes with power off). The compressor must stands by for 3 minutes
before it is restarted after shut down.
There is no 2-minute limit when changing the temperature setting or shutting down the machine through
the remote controller, and the machine can be shut down immediately.
Avoiding electrical shock: outlet air is available 2 seconds later after startup.
High temperature expiration protection:
(1)High temperature expiration prevention:When the temp.of coil pipe is above 161°F,compressor and
outlet air stop running 10 seconds later, and inlet air runs as the temp. sensor is off. When compressor stands
by for 3 minutes and the temp. of coil pipe is below 149°F, the unit can be started again.
Protection of frost is available (disable in test run or heating mode): In order to prevent the indoor heat
exchanger from freezing (in cooling or dehumidifying mode), the compressor will be shut off when the
temperature of the indoor coil pipe is or below 30°F and the compressor runs for over 5 minutes. When the
temperature of the indoor coil pipe ascends to over 44°F, the compressor is restarted (must meet a 3-minutes
delay)
Timer on, Timer off and sleep control are available.
5.1.4 Dehumidifying mode
喚
Temperature control range : 60°F ---86°F
Control character:
When Tr (indoor temperature) > Ts (temperature setting) +3°F, compressor and outdoor fan motor run
continuosly with indoor fan motor runnig in accordance with the wind speed setting(State 1).
When Ts dTr dTs +3°F, outlet air from compressor is on for 10 minutes and off for 6 minutes, the indoor
fan motor is off in 3 minutes after shut down of compressor and gives breeze in other time(State 2).
When Tr < Ts, outlet air from compressor is unavailable, and the indoor fan motor enter breeze mode 3
minutes later after after shut down of compressor(State 3).
When all the ranges alternate, there is ±2°F difference.

HSU09/12XHK-SMFunctions and Control
Domestic Air Conditioner
12
5.1.5 Heat ing mode: 
*Temperature control range : 60°F ---86°F
*Temperature control precision: 2°F
*Control Character:
When Tr ≤ Ts, compressor, four-ways valve and outdoor fan motor is on, indoor fan motor runs as in cold
, and 7°F of compensation is added after compressor is started.
When Tr>Ts+9°F, compressor is off, and the indoor fan motor runs as in warm blast mode.
When Tr<Ts+9°F, compressor, four-ways valve and outdoor fan motor is on, and the indoor fan motor
runs as in cold .
*Control of indoor fan motor:
Manual operation: The wind speed can be set to high, medium, low or automatic as required.
Automatic operation: When Tr < Ts, the wind speed is high;
When Ts ≤ Tr≤ Ts+3°F, the wind speed is medium.
When Ts+3°F ≤ Tr, the wind speed is low.
*Control of air door: setting the position of air door as required.
*Compressor control喚The compressor can’t be controlled by temperature sensor in 2 minutes after start
up and also can’t be started again at least 3 minutes later after shut down. There are 3-minute protection with
power on for the first time (over 3 minutes with power off). The compressor must be started again 3 minutes
later after shut down.
*Avoiding electrical shock: outlet air is available 2 seconds later after start up.
*Timer on, Timer off and sleep control are available.
*Control of 4-way valve: When the unit is started for the first time, the 4-way valve starts runnig 10
seconds earlier than compressor does. After compressor stops runnig, the 4-way valve continues running for
2 minutes and then stops. If changing the unit from heating to cooling, the 4-way valve is shut off 2 minutes
later and compressor is started 3 minutes later.
5.1.5.1 Cold draf t pr evetion:
5.1.5.1.1 Compressor is interrupted during the defrosting operation and continues to run after
defrosting is completed. When the indoor exchanging temperature is below 73°F, the indoor fan motor is off.
When the indoor exchanging temperature is above 73°F, the indoor fan motor is running at weak speed.
5.1.5.1.2 If the temperature of coil pipe can’t be above 100°F 4 minutes later after start up, fan motor
is running at the preset wind speed.
5.1.5.1.3 If the temperature of coil pipe is above 100°F 4 minutes later after start up, fan motor is
running at the preset wind speed.
5.1.5.1.4 If coil pipe descends to the temp. lower than 100°F from 100°F. fan motor is running at the
preset wind speed.
*Warm blast: If the temperature sensor is off. Compressor stops runnig. If the temperature of coil pipe is
above 73°F, fan motor enter breeze mode; and if the temperature of coil pipe is below 68°F, fan motor stops
running.
5.1.5.2 High temperatur e prote ction and high temperature expiration protection:
5.1.5.2.1 High temperature prevention: When the temp. of coil pipe is above 132°F, the outdoor fan
motor stops.When the temp descends to 125°F, the outdoor fan motor is restarted ,fan should keep stopping
more than 45 seconds.
5.1.5.2.2 High temperature expiration prevention:When the temp.of coil pipe is above 143°F,compressor
and outlet air stop running 10 seconds later, and inlet air runs as the temp. sensor is off. When compressor
stands by for 3 minute and the temp. of coil pipe is below 122°F, the unit can be started again.

HSU09/12XHK-SM Functions and Control
Domestic Air Conditioner
13
*Current protection and current expiration protection: (Not detecting within 60 seconds after start up)
*Overcooling protection˖One and half a minutes later after compressor starts, if the temperature of coil
pipe is below 2°F, compressor and air outlet stop, and air inlet runs according to the temp. setting.
Compressor can be restarted 3 minutes later.
5.1.5.3 Defrosting:
5.1.5.3.1 Entry conditions of defrosting:
The entry conditions of defrosting is classified into two types: intelligented defrosting and sensor
defrosting. Through selecting and judging, the models without outdoor sensor defrosts according to
intelligented defrosting, and others with ensor defrosts according to sensor defrosting.
Intelligented defrosting:
5.1.5.3.1.1 Indoor unit enter overload protection and air outlet stops when air outlet has been restarted
and runs over 10 minutes, and compressor runs over 45 minutes in total and over 20 minutes continuously,
and the temp. of indoor coil pipe is below 100°F.
5.1.5.3.1.2 Compressor runs 20minutes continuously, and the temp. of indoor coil pipe decreases 2°F
per 6 minutes and this operation repeats 3 times, and the temp. of coil pipe is below 100°F, and 5 minutes
later after compressor is restarted.
5.1.5.3.1.3 When compressor runs over 3 hours in total and over 20 minutes continuously and after
the temp. of indoor coil pipe is below 100°F, the system enters defrosting mode.
5.1.5.3.1.4 The difference between the temp. of indoor coil pipe and the indoot temp. is below 60°F and
lasts 5 minutes, compressor runs over 45 minutes in total and over 20 minutes continuously after the temp. of
indoor coil pipe is below 100°F, the system enters defrosting mode.
5.1.5.3.2 Exit conditions of defrosting:
Defrosting time is higher than 12 minutes (compressor is on).
5.1.5.3.2.1 During the defrosting, if current peak value is cut off, the unit quit the defrosting mode. But
the protection of expiration of current peak value is unavailable with 60 senconds after compressor is started.
5.1.5.3.2.2 During the defrosting and 2 minutes After quiting the defrosting mode, abnormality of temp.
sensor isn’t detected.
5.1.5.3.2.3 After quiting the defrosting mode, the fan motor enter cooling prevention mode.
5.1.5 Timer function:
You can set 24-hour timer on or timer off as required, and the minum time unit is 1 minute. After setting,

HSU09/12XHK-SM Functions and Control
Domestic Air Conditioner
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the indicator of indoor unit is on , and it is off when timer setting is completed. There are several timer mode
as follows.
5.1.5.1 Timer on: The LED of “timer on” lights up, and unit behaves with halt status. Timer on is
completed, and then unit starts running with the LED of “timer on” off. The unit starts with the the last setting
receiving timer signals, and sleep setting is not allowed.
5.1.5.2 Timer off: Unit starts, timer indicator lights up; When reaching time setting, the indicator goes out,
unit enters shut down mode, and sleep function can be set. If timer off and sleep are set synchronously, the
one which time is short run first. Executing shutdown instruction clear timer and sleep function.
5.1.5.3 Timer on and timer off can be set synchronously.
5.1.6 Sleep function:
the timer indicator lights up.
5.1.6.1 In cooling/defrosting mode, the temp. setting increases 1°F one hour later after start up. After
another hour the temp. setting increase by more 1°F and then run continuously for another 6 hours and then
close.
5.1.6.2 In heating mode, the temp. setting decrease 3°F one hour after start up. After another hour the
temp. setting decrease by more 3°F. After 3 hours the temp. setting rise by 1°F and then run continuously for
another 3 hours and then close.
5.1.6.3 If the wind speed is set to high before going to bed, the wind speed become medium after start
up; If the wind speed is set to medium before going to bed, the wind speed become low after start up; If the
wind speed is set to low before going to bed, the wind speed keep unchanged.
5.1.7 Emergency switch imput:
5.1.7.1 Press the switch of emergency operation, then buzzer rings once and unit enters the automatic
operation mode. (emergency operation)
5.1.7.2 If the switch is kept pressed for 5 seconds, buzzer ring two times and unit enter enter test run
mode.
5.1.7.3 Press the switch again, and then closes.

HSU09/12XHK-SM Functions and Control
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5.1.7.4 Enter emergency operation from timer mode, then timer is cancelled.
5.1.8 Test run:
5.1.8.1 The temperature sensor of inlet air doesn’t work, and compressor starts (but subject to the limit
of -minute delay excluding the first time), and high wind, cooling, and air door is open.The indoor fan motor
runs, running indicator lights up, compressor relay and the one of outdoor fan motor is closed
5.1.8.2 During test run:
The prevention of freezing of evaporator doesn’t work.
Current cross control doesn’t work.
The control of current cross peak expiration doesn’t work.
Temperature control doesn’t work.
Temperature expiration control doesn’t work.
5.1.9 memory function
喚
The memory function of power down is available, and the auto recovery function of power on is optional. (In
auto, heating, cooling, or defrosting status, press the “ ” button to enter additional options喌when cycle
dispay to 喌will flash喌and then press 喌quickly press 喌and then press 喌rapidly
10 times within 6 seconds, and the auto recovery function of power on can be set on/off. If the buzzer rings 4
times, the the auto recovery function of power on is available; If the buzzer rings 2 times, the the auto
recovery function of power on is unavailable.)
If there is no EEPROM, the unit is taken off the ‘off’ function of the memory function of power down. But
the memory function of power down can also be set on/off, and the data is the default value of chip.
5.1.10 Alarm from indoor fan motor:
2 minutes later after the indoor fan motor is charged, and the impulse from fan motor is not detected, hen
send alarm signals.

HSU09/12XHK-SM Functions and Control
Domestic Air Conditioner
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5.2 Value of Thermistor
5.2.1 Indoor unit
Room sensor
R25 =23KΩ±3.5%ć
B25 /50 =4200K±3%ćć
Temp.(ć) Max.(KΩ) Normal(KΩ) Min.(KΩ) Tolerance(ć)
-30 568.8372 501.0746 440.8435 -1.97 1.75
-29 530.9600 468.6491 413.1441 -1.95 1.74
-28 495.8488 438.5314 387.3645 -1.93 1.72
-27 463.2850 410.5433 363.3602 -1.91 1.71
-26 433.0683 384.5212 340.9980 -1.90 1.70
-25 405.0156 360.3153 320.1558 -1.88 1.69
-24 378.9588 337.7879 300.7211 -1.86 1.67
-23 354.7440 316.8126 282.5905 -1.84 1.66
-22 332.2300 297.2732 265.6686 -1.82 1.64
-21 311.2873 279.0627 249.8676 -1.80 1.63
-20 291.7969 262.0831 235.1067 -1.78 1.62
-19 273.6494 246.2437 221.3111 -1.76 1.60
-18 256.7445 231.4612 208.4122 -1.74 1.59
-17 240.9897 217.6590 196.3462 -1.72 1.57
-16 226.3000 204.7662 185.0545 -1.70 1.56
-15 212.5973 192.7176 174.4829 -1.68 1.54
-14 199.8093 181.4531 164.5813 -1.66 1.53
-13 187.8698 170.9169 155.3033 -1.64 1.51
-12 176.7176 161.0578 146.6059 -1.62 1.49
-11 166.2961 151.8284 138.4495 -1.60 1.48
-10 156.5532 143.1847 130.7973 -1.58 1.46
-9 147.4409 135.0863 123.6153 -1.56 1.44
-8 138.9148 127.4956 116.8717 -1.53 1.43
-7 130.9337 120.3778 110.5374 -1.51 1.41
-6 123.4597 113.7009 104.5852 -1.49 1.39
-5 116.4577 107.4349 98.9897 -1.47 1.38
-4 109.8953 101.5523 93.7278 -1.45 1.36
-3 103.7422 96.0274 88.7774 -1.43 1.34
-2 97.9708 90.8365 84.1185 -1.40 1.32
-1 92.5551 85.9574 79.7322 -1.38 1.30
0 87.4712 81.3697 75.6011 -1.36 1.29
1 82.6970 77.0544 71.7088 -1.34 1.27
2 78.2118 72.9937 68.0402 -1.31 1.25
3 73.9966 69.1712 64.5813 -1.29 1.23
4 70.0335 65.5716 61.3188 -1.27 1.21
5 66.3062 62.1807 58.2405 -1.24 1.19

HSU09/12XHK-SM Functions and Control
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6 62.7992 58.9853 55.3351 -1.22 1.17
7 59.4984 55.9729 52.5917 -1.20 1.15
8 56.3905 53.1320 50.0006 -1.17 1.13
9 53.4631 50.4521 47.5523 -1.15 1.11
10 50.7048 47.9230 45.2384 -1.13 1.09
11 48.1049 45.5355 43.0505 -1.10 1.07
12 45.6534 43.2808 40.9813 -1.08 1.04
13 43.3410 41.1509 39.0236 -1.05 1.02
14 41.1592 39.1381 37.1708 -1.03 1.00
15 39.0998 37.2355 35.4167 -1.00 0.98
16 37.1553 35.4363 33.7555 -0.98 0.96
17 35.3186 33.7344 32.1818 -0.95 0.94
18 33.5833 32.1240 30.6905 -0.93 0.91
19 31.9432 30.5997 29.2769 -0.90 0.89
20 30.3925 29.1565 27.9365 -0.88 0.87
21 28.9259 27.7895 26.6651 -0.85 0.84
22 27.5383 26.4944 25.4589 -0.83 0.82
23 26.2252 25.2670 24.3140 -0.80 0.80
24 24.9822 24.1034 23.2271 -0.78 0.77
25 23.8050 23.0000 22.1950 -0.78 0.77
26 22.7500 21.9499 21.1520 -0.78 0.78
27 21.7477 20.9536 20.1638 -0.82 0.81
28 20.7951 20.0081 19.2272 -0.86 0.85
29 19.8895 19.1104 18.3394 -0.89 0.88
30 19.0285 18.2581 17.4974 -0.93 0.92
31 18.2094 17.4484 16.6988 -0.97 0.95
32 17.4302 16.6792 15.9410 -1.00 0.99
33 16.6885 15.9480 15.2217 -1.04 1.02
34 15.9825 15.2530 14.5389 -1.08 1.06
35 15.3103 14.5920 13.8903 -1.12 1.09
36 14.6700 13.9632 13.2743 -1.16 1.13
37 14.0599 13.3650 12.6889 -1.20 1.16
38 13.4786 12.7957 12.1325 -1.23 1.20
39 12.9244 12.2537 11.6035 -1.27 1.24
40 12.3960 11.7375 11.1004 -1.31 1.27
41 11.8921 11.2459 10.6218 -1.35 1.31
42 11.4113 10.7775 10.1665 -1.39 1.34
43 10.9526 10.3311 9.7330 -1.43 1.38
44 10.5147 9.9056 9.3204 -1.48 1.42
45 10.0967 9.4999 8.9275 -1.52 1.45
46 9.6976 9.1130 8.5532 -1.56 1.49
47 9.3163 8.7439 8.1965 -1.60 1.53
48 8.9521 8.3916 7.8566 -1.64 1.57
49 8.6040 8.0554 7.5327 -1.68 1.60