Haier 18VHJ(DB) User manual

SERVICE MANUAL

Order No.$&69

DC Inverter E-Series

Model No. HSU12/18VHJ(DB)

© (Qingdao Haier Air Conditioner General corp.,Ltd)

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

19

46

30

25

54

55

68

72

82

91

9

HSU12/18VHJ(DB)

of indoor unit

Main functions and control specifications of outdoor unit

Function of main thermistor

31

Value of thermistor

4

Service Diagnosis

54

Caution for diagnosis

M

3

Error codes and description indoor display

For 12K indoor unit

For 18K indoor unit

For 12/18K outdoor unit

12/ VHJ(DB)

101

102

106

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.

+6812/VHJ(DB)

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

+6812/VHJ(DB)

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

+6812/VHJ(DB)

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.

+6812/VHJ(DB)

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1090(250-1450)

1190(250-1450)

16

8.0

1640(270-1900)

7.8

1650(270-1950)

9

8

7. 2

6. 3

45/ 42/38

53

5.4 5.9

3.95(0.88-4.25)

41 1/6 x 9 2/5 x 11 3/4

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24

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32

36.4

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4

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18000(4000-19000) 19000(4000-20500)

5.27(1.17-5.57) 5.57(1.17-6.00)

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) 4790.2(1006.2-5160)

SEER/HSPF

16

9.5

49 1/5

82 1/50

32 4/5

49 1/5

HSU12/18VHJ(DB)

9

8. 2

7. 3

5.8

45/42/40

45/ 42/38

inches

5/8

feet

32 4/5

lbs

inches

0.018

pints/hr

OZ/Inches

0.88

R410a

35.27

42.33

79.4

72.8

49

63

59

21 3/8 x 30 5/6 x 10 2/51

24 1/6 X 36 3/5 X 13 2/5

780 780

3.5

53

31.6

4.9

4.8

1090

1050

20

26

80

650

ESTER OIL VG74

900

FV50S

Rotary Compressor

SNB130FGYM2

49

63

59

25 1/3 x 30 5/6 x10 2/51

28 1/9 X 36 3/5 X 13 27/70

53

88.2

97

8

1115

31.6

1115

31.6

1115

31.6

1115

0.65

Rotary Compressor

DA89X1C-20FZ

HSU12/18VHJ(DB)

oz

80 F

67 F

95 F

75 F

70 F /60° FWB

47 F 47 F

lbs

inches

pints

16 2/5 feet

Domestic Air Conditioner

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4.1᧶Indoor unit Connectors

Connectors

PCB(1) (Control PCB)

1) CN26 Connector for fan motor

2) CN11 Connector for STEP motor

3) CN8 Connector for heat exchanger thermistor and Room temperature thermistor

4)CN27 Connector for fan feedback

5)CH1 Connector for power L wire

6)CON2 Connector for power N wire

7) CON7 Connector for communicate wire

8) CN30 Connector for transformer input

9) CN31 Connector for transformer output

10) CN32 Connector for display board

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





FOR 12K

9

HSU12/18VHJ(DB)

Domestic Air Conditioner

PCB(1)

CN31

CN11CN1CN32CN26 CN27

CON2

CN30

CON12

CON8

CH1

10

HSU12/18VHJ(DB)



Domestic Air Conditioner

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

8ĐC0N7 Connector for communicate between the indoor board and the outdoor

board

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





FOR 18K

11

HSU12/18VHJ(DB)



Domestic Air Conditioner

PCB(1)

CN26

CON1

CON2

CN11

CN32

CN1

CN48

CON8

CON6

CON7

12

HSU12/18VHJ(DB)

Domestic Air Conditioner

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

CN2 CN3 CN4 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

FOR12K

13

HSU12/18VHJ(DB)

Domestic Air Conditioner

PCB(1)

CN2

CN1

CN4

CN8

CN25

CN26 CN24 CN23 CN22

CN17

CN18

CN19

CN20

CN16

CN21

CN10

CN3

14

HSU12/18VHJ(DB)

Domestic Air Conditioner

PCB(2)

CN1

CN2

CN3

CN4

CN5

CN6

CN7

CN11

CN10

15

HSU12/18VHJ(DB)



Domestic Air Conditioner

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

CN2 CN3 CN4 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

FOR 18K

16

HSU12/18VHJ(DB)



Domestic Air Conditioner

PCB(1)

CN2

CN1

CN4

CN8

CN25

CN26 CN24 CN23 CN22

CN17

CN18

CN19

CN20

CN16

CN21

CN10

CN3

17

HSU12/18VHJ(DB)

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Haier 18VHJ(DB), HSU12VHJ(DB), HSU18VHJ(DB) User manual

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