Haier HSU24VHJ(DB) User manual

SERVICE MANUAL
Order No.AC1101S021V0
DC Inverter EA-Series
Model No. HSU24VHJ(DB)
©(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

15
15
42
42
42
26
21
50
50
51
67
71
71
90
9
HSU24VHJ(DB)-SM
of indoor unit
Main functions and control specifications of outdoor unit
Function of main thermistor
27
Value of thermistor
4
Service Diagnosis
50
Caution for diagnosis
M
3Error codes and description indoor display
For indoor unit
For outdoor unit
10. Wiring Diagrams ..........................................................................................103
10.1 Indoor Unit ..................................................................................................103
10.2 Outdoor Unit ...............................................................................................104
11. Circuit Diagrams ..........................................................................................105
12. Description of Coding rules of Unit Model ................................................110

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.
HSU24VHJ(DB)-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
HSU24VHJ(DB)-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
HSU24VHJ(DB)-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.
HSU24VHJ(DB)-SM

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HSU24VHJ(DB)-SM

24
HSU09VHJ(DB)

HSU24VHJ(DB) Specifications
7
Domestic Air Conditioner
3. Specifications
Model
HSU24VHJ(DB)
Cooling Heating
Capacity Rated (Min.~Max.)
)0.7~2.2(7.6)7.6~2.2(4.6Wk
Btu/h 22000(7500~23000) 23000(7500~24000)
kcal/h 5504(1892~5762) 5762(1892~6020)
---9.68
pints/h
lavomeRerutsioM
8.90.01A)detaR(tnerruCgninnuR
)0072~063(0022)0042~003(0522WdetaRnoitpmusnoCrewoP
7969%rotcaFrewoP
916FPSH/REES
Piping Connections
(external diameter)
3/8inchesdiuqiL
inchessaG
5/8inchesniarD
Heat Insulation Both Liquid and Gas Pipes
98 7/16
incheshtgneLgnipiP.xaM
59 1/16
inchesecnereffiDleveL.xaM
29 1/2
inchessselegrahC
Amount of Additional Charge of
Refrigerant 0.02pounds/inches
Indoor Unit
Front Panel Color White
Air Flow Rate m³/min(cfm)
(434.2)3.213(398.9).11H
(398.9)3.11
(367.1)
4.01M
3(363.6).014(331.8).9L
Fan
naFwolFssorCepyT
Motor Output
upper/lower
02W
otuAdnaspetS4spetSdeepS
drawnwoD/latnoziroHlortnoCnoitceriDriA
Air Filter Removable / Washable / Mildew Proof
Run current rated 51.0A
33WnoitpmusnocrewoP
69%rotcafrewoP
lortnoCretupmocorciMlortnoCerutarepmeT
41 3/16X11 3/4X9 13/32inches
)D×W×H(snoisnemiD
44 3/8X15 1/4X13 1/2inches
)D×W×H(snoisnemiDdegakcaP
28.6pounds
thgieW
36.3poundsthgieWssorG
54/74/05
(A)BdL/M/HdnuoSnoitarepO
Sound Power
H(cooling/
heating)
06B(A)d
Btu/(h.w)
5/8

0.88
R410a
3.52
51.7
1825.0
51.7
1825.0
114.84
106.04
60
33 7/8X12 1/8X28 3/4
39 3/16X16 1/2X32 1/16
2120 1970
9.5 9.1
60
27
35
70 70
SNB130FGYM2
900
FV50S
5
HSU24VHJ(DB)-SM
pounds
inches
pints
inches
(A)
(A)
pounds
pounds

HSU24VHJ˄DB˅ConnectorWiringDiagram
Domestic Air Conditioner
9
4.Printed Circuit Board Connector Wiring Diagram
4.1᧶Indoor unit Connectors
Connectors
PCB(1) (Control PCB)
1) CN26 Connector for fan motor
2) CN1 Connector for heat exchanger thermistor and Room temperature thermistor
3) CN11` Connector for UP&DOWN STEP motor
4) CON2 Connector for power N wire
5) CON1 Connector for power L
6) CN32 Connector for display board
7) C0N6,C0N8 Connector for ions generator
Note: Other designations
PCB(1) (INdoor Control PCB)
1) CN48 Connector for Forced operation ON / OFF switch
2) J1 Select 25 or 35
3) LED1 communicate display light
4)RV1 Varistor
5) FUSE1 Fuse 3.15A/250VAC

HSU24VHJ˄DB˅ConnectorWiringDiagram
Domestic Air Conditioner
10
PCB(1)
CN26
CON1
CON2
CN11
CN32
CN1
CN48
CON8
CON6

HSU24VHJ˄DB˅ConnectorWiringDiagram
Domestic Air Conditioner
11

HSU24VHJ˄DB˅ConnectorWiringDiagram
Domestic Air Conditioner
12
4.2 ᧶outdoor unit
Connectors
PCB(1) (Control PCB)
1) CN1,CN2 Connector for power N and L
2) CN3 Connector for ground
3) CN22 Connector for DC POWER 15Vand 5V to the module board
4) CN16 Connector for electric expansion valves
5) CN21 Connector for DC fan motor
6) CN10 Connector for four way valve coil
7) CN17,CN18,CN19,CN20 Connector for thermistors
(CN20: outdoor air,CN19: heat exchanger, CN18 :SUCK thermistors ,CN17 :discharge pipe)
8) CN23 Connector for communicate between the control board and the module board
9) CN25 ,CN8 Connector for the L,N to the module board
10) CN4 Connector for communicate between the indoor board and the outdoor board
11) CN26 Connector for capacitance anode
12) CN24 Connector for capacitance cathode
PCB(2) (module PCB)
CN10 Connector for the DC power 5V and 15V form the control PCB
CN11 Connector for communicate between the control board and the module board
P( CN1), N(CN5) Connector for capacitance board
LI (CN7),LO(CN6) Connector for reactor
CN2ˈCN3ˈCN4 Connector for the U, V, W wire of the
compressor
Note: Other Designations
PCB(1) (Control PCB)
1) FUSE 1, (25A,250VAC) FUSE 2(1A,250VAC)
2)LED 1 keep light representative normal ,if keep flash interval representative trouble Alarm
3)RV1,RV2,RV3 Varistor

HSU24VHJ˄DB˅ConnectorWiringDiagram
Domestic Air Conditioner
13
PCB(1)
CN2
CN1
CN4
CN8
CN25
CN26 CN24 CN23 CN22
CN17
CN18
CN19
CN20
CN16
CN21
CN10
CN3

HSU24VHJ˄DB˅ConnectorWiringDiagram
Domestic Air Conditioner
14
PCB(2)
CN1
CN2
CN3
CN4
CN5
CN6 CN7
CN11
CN10

HSU24VHJ˄DB˅Funcitions and Control
Domestic Air Conditioner
15
5.Funcitions and Control
5.1 Main functions and control specification of indoor unit
This specification use for HSU18VHJ˄DB˅frequency conversion air condition are manufactured
by Haier air condition parent company. "Setting value" (express in parameter) in this specification
means is a parameter that is stored in EEPROM. Refer to [EEPROM parameter table].
5.1.1 Temperature Adjusting function
5.1.1.1 Temperature adjusting of different levels.
(DASH operation conditions under different modes)
5.1.1.2 Select the wind volume when it is set automatic
When the wind volume is automatic, it can be switched between strong, medium and weak according
to the temperature adjusting levels.
Wind volume under the automatic wind volume mode
Temperature adjusting levels
A B C D E F G H I
Heating
Strong Strong Strong Strong Strong Medium Weak Weak SLO
cooling
Strong Strong Strong Medium Medium Weak Weak Weak
Moisture
removing
Strong Medium Medium Medium Weak Weak SLO SLO
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HSU24VHJ˄DB˅Funcitions and Control
Domestic Air Conditioner
16
5.1.1.3 Wind volume limit
When the compressor is working and the max setting for indoor fan motor is medium or weak, the
upper limit of indicated frequency is as follows:
Frequency control form for wind volume
Limited frequency
variables
Limited frequency
Medium wind volume FQLIMMD 70Hz
Weak wind volume FQLIMLO 58Hz
Limited frequency for
up/down health wind
FUPHEAL 48Hz
5.1.2 Main functions
5.1.2.1 Warm boot
When the heat running starts or the frost removing ends and the compressor starts again, in order to
avoid cold wind, warm boot wind volume control should be done.
Heat exchange temperature
THHOT3喈37ć˅
THHOT2喈35ć喉
THHOT1喈25ć喉
THHOTR喈23ć˅
4minutes
Stop weak setting weak stop
To control the indoor fan motor as shown in the table above according to the heat exchange
temperature
The fan motor stops when the heat exchange temperature is below 25ć
The fan motor is working slightly weak when the heat exchange temperature is above25 ćand below
35ć
The fan motor is working weak when the heat exchange temperature is above35 ćand below 37ć
The fan motor works as set if the he heat exchange temperature remains above 38ć
slightly
weak
slightly
weak

HSU24VHJ˄DB˅Funcitions and Control
Domestic Air Conditioner
17
5.1.2.2 When the compressor stops and remains idle for 3 minutes
20 seconds after the compressor stops, the up wind volume is weak (switching to SSLO in silent
running mode) and then slightly weak. While the down wind volume is stoped
If the compressor stops when the heat running starts, the wind volume is weak
5.1.2.3 Dehumidification running
Under the dehumidification mode the fan motor stops as the compressor stops
The operation is weak after 3 minutes’ idle mode
After stand by for 3 minutes, the compressor is on.
The compressor operates as the set wind volume when the wind volume is set to be strong, medium
or weak
The wind volume is decided according to the temperature adjusting when the wind volume is set to be
automatic.
Moisture removing running
Level H 3minutes idle mode
Compressor
OFF
Setting slightly OFF weak weak setting
weak
5.1.2.4 Automatic running
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≥23ćChooseCoolingMode
Tr˘23ćChoose 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.
5.1.3 Special functions
5.1.3.1 Powerful running
Powerful running for 15 minutes
The running stops or ends the powerful running after 15 minutes
The mode switch ends the powerful running
Enter into the silent mode, normal running mode or timed switching on mode to end the powerful
running

HSU24VHJ˄DB˅Funcitions and Control
Domestic Air Conditioner
18
When in automatic mode, there are powerful and silent functions for your choice. When the main unit
is in cooling mode, it operates with powerful cooling or silent cooling. When the main unit is in heating
mode, it operates with powerful heating or silent heating. When the main unit is in wind-sending mode,
there are no powerful or silent modes.
There is no powerful mode for wind-sending and moisture removing
Powerful heating
˖
Change the set temperature. With temperature adjusting function
The wind volume is the automatic medium
When in frost removing mode, the outdoor unit does not accept the communication signal for powerful
running
After 15 minutes of powerful running, the compressor can not be off within 10 minutes
Powerful cooling
˖
Change the set temperature. With temperature adjusting function
The wind volume is the automatic strong
After the compressor starts, there will be no low-intense running protection within 3 minutes
5.1.3.2 Silent running
Send the silent running signal to the outdoor unit
Under the Silent hearing mode,The wind volume is SSLO after the compressor is on,The wind volume
will be kept SSLO within 20 seconds after the compressor stops and then changes to weak
Under the Silent cooling mode the wind volume is SSLO
There is no silent mode for moisture removing and wind-sending.
5.1.3.3 Air cleaning
If the fan motor starts working after receiving the remote-control order, the aion generator starts
working and sends out ions.
The ion generator stops as the fan motor stops.
When the ion generator is OFF and the air cleaning function is on, the fan motor starts running and
the ion generator starts working again.
5.1.3.4 Timed running
Set the time duration according to the time difference between the clock for
timing and the current clock
In timing mode, the display panel will flash the light at fixed times
Timed When this function is set, operation modes on the panel display will not
OFF change. The timing icon will show and the operation stops when the set time comes.
Timed When this function is on, the panel display will only display a question mark.
ON The unit will operate as the set mode when the time comes.
Timed The unit will start operating or stop according to the order of your setting.
ON/OFF