Haier Air Conditioner HSU18VH7 User Manual

Air conditioner

Edition: 10070808

Domestic

Air conditioner

HSU18VH7

CAUTION

READ THIS MANUAL

CAREFULLY TO

DIAGNOSE TROUBLE

CORRECTLY BEFORE

OFFERING SERVICE.

THIS MANUAL IS USED

BY QUALIFIED

APPLIANCE

TECHNICIANS ONLY.

HAIER DOES NOT

ASSUME ANY

RESPONSIBILITY FOR

PROPERTY DAMAGE

OR PERSONAL INJURY

FOR IMPROPER

SERVICE

PROCEDURES DONE

BY ONE UNQUALIFIED

PERSON.

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Air conditioner

Edition: 10070808

1. General information

This Service Manual describes the operation, disassembly, troubleshooting, and

repair of Haier Room Air Conditioners, etc. It is intended for use by authorized services

who troubleshoot and repair these units.

It is assumed that users of this manual are familiar with the use of tools and

equipment used to troubleshoot and repair electrical, mechanical, and refrigeration

systems; and understand the terminology used to describe and discuss them.

Haier urges you read and follow all safety precautions and warnings contained in this

manual. Failure to comply with safety information may result in severe personal injury or

death.

Related Publications

This is a base service manual, covering a range of similar models. It is intended to be

used in conjunction with the Parts Manual and Technical Sheet covering specific model

being serviced.

NOTE: General Precautions and Warnings

! WARNING

To avoid risk of personal injury or death due to electrical shock, disconnect electrical

power to unit before attempting to service the unit.

WARNING

To avoid risk of personal injury or death due to electrical shock, DO NOT, under any

circumstances, alter the grounding plug .Air conditioner must be grounded at all times. Do

not remove warning tag from power cord. If a two-prong (non-grounding) wall receptacle

is encountered, contact a qualified electrician and have the receptacle replaced with a

properly grounder wall receptacle in accordance with the National Electrical Code.

WARNING

To avoid risk of heat exposure, which may cause death or severe illness, air

conditioner must be monitored when malfunctions or shuts down.

WARNING

To avoid risk of personal injury or death due to electrical shock, grounding wires and

wires colored like grounding wires are NOT to be used as current carrying conductors.

The standard accepted color coding for ground wires is green or green with a yellow

stripe. Electrical components such as the compressor and fan motor are grounded

through an individual wire attached to the electrical component and to another part of the

air conditioner. Grounding wires should not to be removed from individual components

while servicing, unless the component is to be removed and replaced. It is extremely

important to replace all removed grounding wires before completing service.

- 1 -

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10070808

HSU18VH7

Product Features

TEMP

SIGNAL SENDING

FAN SPEED

SLEEP

HEALTH

POWER ON/OFF

18000/17800 BTU

1580/1560W/7/7.5A

SEER:13.0/13.0

HSPF:7.7/7.7

18000/18000 BTU

1520/1480W/6.7/7.2A

500 CFM

1PH 230/208V ~ 60Hz

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10070808

HSU18VH7

1 PH 230/208V / 60Hz

18000/17800 BTU

1580/1560W/7/7.5A

13.0/13.0

SEER

HSPF

18000/18000 BTU

1520/1480W/6.7/7.2A

7.7/7.7

-7℃～43℃

1350rpm

1260rpm

1180rpm

900/830rpm

(High/Med/Low)

500/480/450CFM

IP24

5.2 Pints/hr

YR-H24

3G2.5mm2

Toshiba/PA160X2CS-3KUU

750ml

R410A/67.4Oz

50g

47/46/44 47/45/44

60/62

Indoor(H/M/L)

Outdoor

(dB)

Φ16mm

600Psig

Φ16mm

Low pressure at cool side

Φ6.35/12.7mm

3/15m

33.6lbs

40lbs

116lbs

124lbs

8 13/16*45 15/32*12 1/8

28 3/4*33 27/32*10 1/2

9 13/16*40 3/8*14 1/8

26 3/4*32 5/8*13 15/16

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10070808

3.1 Basic Function

86 F

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Air conditioner

Edition: 10070808

3.2 . Introduction to electrical control functions

Including brief introduction to air conditioners of series models and electric control

function.

Brief introduction to electric control function

3.2.1

Automatic running (applicable to fan-coil model)

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≥23℃

b. Tr<23℃

running refrigerating mode Ts=26℃

running heating mode Ts=23℃

After turning to the automation mode, the running mode can be switched between

refrigerating mode, fan mode and heating mode according to the change of the indoor

ambient temperature. But the automatic conversion between refrigerating mode and

heating mode must be conducted after 15 minutes.

3.2.2

Indoor temperature control

Compressor OFF

Compressor ON

Heating

-1

Compressor OFF

Refrigerating

-1

Setting temperature

Compressor ON

3.2.3

Dehumidification running

The compressor, outdoor fan and indoor fan will run as per the following working

pattern so as to realize the refrigerating running of dehumidification:

Tr> Ts+2℃, compressor, outdoor fan run continuously, indoor fan runs as

3.2.3.1

per setting wind speed (State 1);

3.2.3.2 Ts+2℃≥Tr≥Ts, compressor, outdoor fan run intermittently with 10

minutes ON, 6 minutes OFF. (Compressor and outdoor fan are synchronous)

indoor fan runs in fixed lower wind speed, and will cease at the stand-by time of 3

minutes (State 2)

Tr <Ts, compressor, outdoor fan ceases, indoor fan runs in lower wind speed.

3.2.3.3

(State 3)

- 5 -

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Air conditioner

Edition: 10070808

State1

State2

State3

Ts-1

Ts+2

Ts+3

3.2.4

Warm start (preventing cold wind when heating running begins, applicable to

fan-coil model))

When heating running begins, indoor fan will conduct the following fan control:

If the temperature of indoor coil pipe is ≥ 23℃, start lower wind speed;

If the temperature of indoor coil pipe is ≥ 38℃ or the running time of

compressor≥ 4 minutes, turn to setting wind speed.

3.2.5

Control of indoor fan under heating OFF state (applicable to fan-coil model)

Under heating state, the compressor will cease; if the indoor coil pipe’s

temperature Tp≥23℃, indoor fan will run in lower wind speed.

3.2.6

Defrosting control (applicable to fan-coil model)

Defrosting beginning condition:

a. After the state of Tp-Tr<16℃ is continued for 5 minutes, the accumulated

running time of the compressor exceeds 45 minutes, the continuous running

time of the compressor exceeds 20 minutes;

b. The accumulated running time of the compressor exceeds 3 hours, the

continuous running time of the compressor exceeds 20 minutes, indoor

unit’s Tp <38℃;

c. The continuous running time of the compressor exceeds 20 minutes, the

temperature of indoor coil pipe decreases 1℃ every 6 minutes, which lasts

for more than 3 times, indoor unit’s Tp <38℃;

d. When the indoor unit is in the state of overload protection and the outdoor

unit ceases, when the rerunning time of outdoor unit exceeds10 minutes, the

accumulated running time of the compressor exceeds 45 minutes, the

continuous running time of the compressor is over 20 minutes, and Tp <38

℃.

Defrosting will begin if one of the above conditions is met.

Defrosting finishing condition:

If the defrosting time exceeds 9 (for 12 models)or 7 (for 07,09 models)

minutes,the original heating state will be resumed;

- 6 -

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Air conditioner

Edition: 100070808

Note: Sequence of defrosting actions:

9(or 7)minutes

Compressor

OFF

Four-way valve ON

OFF

Outdoor fan

OFF

55s

1min

55s

1min

3.2.7

Freezing prevention function

Under refrigerating and dehumidifying state, the air conditioner will control the

outdoor fan as per the temperature Tp of the indoor coil pipe according to the

following conditions:

Zone of return deference

Compressor,outdoor fan OFF after 5 minutes

Fan,compressor ON

Tp(℃.)

3.2.8 3 minutes stand-by time

When the compressor ceases due to the sensor OFF, unit On or OFF or fault, it

will maintain pause for 3 minutes.

3.2.9 Overload protection during heating running

Temperature protection of indoor coil pipe: Under heating state, the air

conditioner will control the running of the fan as per the temperature Tp of the

indoor coil pipe and according to the following conditions:

a. 58℃≤Tp, outdoor fan ceases;

Tp≤54℃, outdoor fan resumes; the time

from ceasing to resuming is about 45 seconds;

b. 68℃≤Tp, outdoor fan of compressor ceases after 5 seconds; Tp≤47℃,

compressor resumes after 3 minutes.

Current protection (different models have different protection currents):

a. When 13.0A ≤current of compressor, outdoor fan cease; current of compressor

≤11.7A, outdoor fan resume;

3.2.10 Compensatory function of power failure

If the unit is suddenly off during running due to power failure, or closed for

maintenance or troubleshooting, it will restart to run after the power resumes with

the original condition before the unit is off

Note: Function setting: Pressing the SLEEP button on the remote control unit

for 10 times until hearing 4 sounds from the buzzer on the panel.

Memory content: Running mode, setting wind speed, setting

- 7 -

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Air conditioner

Edition: 10070808

temperature, sleep state, flap state.

c_{. Cancellation of function: Pressing the SLEEP button on the remote}

control unit for 10 times until hearing 2 sounds from the buzzer on the

panel.

3.2.11 Trial run function

When the air conditioner is in OFF state, press the emergency switch for 5

seconds till hearing 2 sounds of click from the buzzer, then the air conditioner will

turn to the trial run state. The unit will run in the refrigerating mode and the

indoor fan will run in high wind speed mode.

3.2.12

Emergency running mode

When the air conditioner is in stand-by state, press the emergency switch till

hearing a sound from the buzzer, then the air conditioner will turn to the

emergency run state. The rules of emergency run are as follows:

a. Tr≥23℃, running refrigerating mode, Ts = 26℃;

b. Tr<23℃, running heating mode, Ts = 23℃.

Temperature compensation.

3.2.13

There is the function of automatic temperature compensation when heating, with

heating temperature setting = Ts(remote setting) + 4℃.

Sleeping function

3.2.14

a. After setting the sleeping function, the refrigerating mode and dehumidification

mode will run as per the following rules:

6hours

T(℃)

1 hour

Ts+2

Ts+1 1 hours

Sleep

OFF

t(hour)

b. After setting the sleeping function, the heating mode will run as per the

following rules:

T(℃)

3hours

Ts-2

Ts-3

Ts-4

1 hour

As shown in the above diagram, after running for 1 hour under refrigerating mode and

dehumidification mode, the setting temperature will increase 1℃; after

- 8-

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Air conditioner

Edition: 10070808

running for 1 hour under heating mode, the setting temperature will decrease 2℃

after another 1 hour, it will decrease the 2℃ again, and after 3 hours, it will

increase 1℃, and after other 3 hours, it will cease.

MODEL

The SW2 select“25”OR“35”

PCB

0010403861

HSU18VH7

- 9 -

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10070808

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Air conditioner

Edition: 10070808

Table for Wrong Codes

Wrong express

reasons

Ways and means

solutions

tools

power timing operating

indoor ambient

temperature

sensor

Check the sensor of indoor ambient

temperature,if the resistance value is

∞,the sensor is

0 or

abnormal.

★ ■ ■

Multimeter

see the following flow chart 1

abnormal

indoor pipe

temperature

sensor

Check the sensor of indoor coilpipe

,if the resistance value is 0 or

∞,the sensor is abnormal.

★ □ □

see the following flow chart 1

abnormal

Indoor fan

motor don’t

feed back

Check whether indoor PCB or motor

is abnormal

■

★

□

★

see the following flow chart 2 Multimeter

Data error or no Check whether the EEPROM is

EEPROM installed properly

□ ★

Change the indoor PCB

Multimeter

■

on flash off

chart 1: SENSOR MALFUNCTIONS

Firstly check whether Terminal CN8 on

the indoor mainboard contact well or not?

Pull out the terminals on the indoor

mainboard and reinsert them.

YES

Pull the sensor out of the mainboard

1) measure the value of resistance between its two jumpers

2)measure the temperature at the room temperature sensing head.

Check the specifications of the sensor to decide whether the sensor is damaged or not?

YES

Replace with new sensor

YES

The Indoor PCB is broken

Replace with new indoor PCB

chart 2 Indoor fan motor malfunction

Pull out and reinsert the terminals.

Check whether Terminal CN2 on the indoor mainboard is well inserted or not?

Electrify the machine again and turn it on in the Cool state with the remote controller.

Measure the voltage between 1 and 4 of Terminal CN2 about DC150-380V,Measure the

voltage between 5 and 4 of Terminal CN2 on the indoor mainboard about DC13-16.5V.

Measure the voltage between 7 and 4 of Terminal CN2 about 1-6.5v

the motor of the indoor

unit is damaged and needs

replacing.

YES

the PCB of the indoor unit is damaged and needs replacing

- 11-

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Edition: 10070808

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10070808

Indoor unit

Grounding line

Connecting wiring:AWG12X4+AWG18X2.

Power Cable:AWG12X3.

Connecting wiring:AWG12X5.

Power Cable:AWG12X3.

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-18-

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10070808

WIRING DIAGRAM INDOOR UNIT

WIRING DIAGRAM OF INDOOR UNIT

LOUVER

MOTOR

FAN MOTOR

ION GENERATOR

COMP

CN4

CN1

SW1

CN2

CN3

CN7

CN9

CN8

PCB

CN10

CN12

NOTING：

ONLY COOLING TYPE DOESN'T HAVE THE

DOTTED LINE.

THE DASHED UNIT IS OPTIONAL UNIT.

w w

w w w

R:RED

W:WHITE

B:BLACK

TO OUTDOOR UNIT

:BLUE

BR:BROWN

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Edition:10070808

OUTDOOR UNIT

WIRING DIAGRAM OF OUTDOOR UNIT

0010510468

_SCM

～

Grounding

line

L2(N)

L1(L)

TO INDOOR UNIT

Y/G:YELLOW/GREEN

R:RED

BL:BLUE

Y:YELLOW

B:BLACK

BR:BROWN

W:WHITE

Note: Because of the difference of compressor,

the dotted line part may not exist.

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10070808

T(℃)

℃

R(KΩ)

251.8

236.9

223.1

210.1

197.9

186.5

175.9

165.9

156.5

147.7

139.5

131.8

124.5

117.7

111.3

105.3

99.63

94.3

T(℃)

R(KΩ)

38.95

37.08

35.31

33.63

32.04

30.53

29.1

27.75

26.47

25.25

24.1

T(℃)

R(KΩ)

℃

8.441

8.103

7.78

-20

-19℃

℃

-18

-17℃

℃

7.472

7.178

6.897

6.628

6.371

6.125

5.889

5.664

5.449

5.243

5.046

4.857

4.676

4.502

4.336

4.177

4.024

3.878

3.738

3.603

3.474

3.35

-16

-15℃

℃

-14

-13℃

℃

-12

-11℃

℃

-10

-9℃

℃

21.96

20.97

20.03

19.14

18.3

17.49

16.73

-8

-7℃

℃

-6

-5℃

℃

-4

-3℃

℃

89.3

-2

-1℃

84.58

80.14

75.96

72.02

68.31

64.81

61.51

58.39

55.45

52.68

50.06

47.58

45.24

43.02

40.93

℃

15.3

14.65

14.02

13.42

12.85

12.31

11.79

11.3

10.83

10.39

9.96

3.231

3.117

3.008

2.903

2.802

2.705

2.611

2.522

℃

9.553

9.165

8.794

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10070808

T(℃) R(KΩ) T(℃) R(KΩ) T(℃) R(KΩ) T(℃) R(KΩ)

℃

-30

-29℃

155.4

146.4

138.1

130.2

122.9

116

℃

30.88

29.42

28.03

26.72

25.48

24.3

℃

8.141

7.819

7.511

7.217

6.936

6.668

6.411

6.166

5.931

5.707

5.492

5.287

5.09

℃

2.666

2.577

2.491

2.408

2.329

2.253

2.179

2.108

2.04

℃

-28

-27℃

℃

-26

-25℃

℃

-24

-23℃

109.5

103.5

97.77

92.44

87.42

82.71

78.29

74.12

70.21

66.52

63.06

59.79

56.71

53.81

51.08

48.5

23.18

22.12

21.12

20.17

19.26

18.4

℃

-22

-21℃

1.975

1.912

1.851

1.793

1.737

1.682

1.63

℃

-20

-19℃

℃

-18

-17℃

17.59

16.81

16.08

15.38

14.71

14.08

13.48

12.91

12.36

11.84

11.35

10.88

10.43

4.902

4.722

4.549

4.383

4.225

4.073

3.927

3.788

3.654

3.525

3.402

3.283

3.17

℃

-16

-15℃

℃

-14

-13℃

1.58

1.531

1.484

1.439

1.395

1.353

1.313

1.274

1.236

1.2

℃

-12

-11℃

℃

-10

-9℃

℃

-8

-7℃

46.07

43.77

41.6

℃

-6

-5℃

39.55

37.62

35.79

34.06

32.43

℃

-4

-3℃

9.592

9.204

8.833

8.479

3.061

2.956

2.855

2.759

1.164

1.13

℃

-2

-1℃

1.098

1.066

1.035

-23-

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HSU18VH7

-24-

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CIRCUIT DIAGRAM

CN20

CN5

DOOR-S

CN3

COM

+5V

R92 10K

XT1

JTP285

+5V

R71

R70

R72

10K

R66

10M

SW1

8.00MHz

R68

C27

102

R76

10k

R61

10K

R62

IC1

PTC4

IRQ

RST

R74

E16

10K

PTC5

PTC3

R34

R32

22K

100UF/25V

C29

102

PTC2/MCLK

PTC1

+12

PTF0/TACH2

PTF1/TACH3

PTF2/TBCH2

PTF3/TBCH3

PTF4/TBCH0

PTF7

PTF5/TBCH1

PTF6

PTE0/TXD

PTE1/RXD

PTE2/TACH0

PTE3/TACH1

PTE4/SS

PTE5/MISO

PTE6/MOSI

PTE7/SPSCK

VSS

R33

10K

PTC0

OSC1

OSC2

C26

103

C24

102

R31

4.7K

10K

R95

R82

+5V

CGMXFC

+5V

VSSA

VDDA

VREFH

10K

C25

R83

R84

R85

R93

C15

R87 R86

104 1K 10K

C31

104

2SC2412

PTD7

PTD6/TACLK

PTD5

PTD4/TBCLK

PTH1/KBD4

PTH0/KBD3

PTD3

2SC2412

2SB1197

CN21

R60 4.7K

R77

10K

R88

100

+5V

GND

R54

R51

390

10K

C21

102

R59 1K

R89

R58

10K

R94

10K

R55

10K

R56

100

PTD2

R78

560

+5V

VSS/VREFL

VDDAREF

PTD1

R57

C18

+5V

43 R37

42 R38

41 R39

10K

C16

104

VDD

C22

104

PTG0/KBD0

PTG1/KBD1

PTG2/KBD2

PTA0

PTD0

102

PTB7/ATD7

PTB6/ATD6

PTB5/ATD5

PTB4/ATD4

PTB3/ATD3

PTB2/ATD2

PTB1/ATD1

PTB0/ATD0

PTA7

R40

R41

IC2

VSS

R81 R80

10K 10K

C17

103

10K

E18

SDA

SCL

TEST

VCC

R42

10K

PTA1

PTA2

PTA3

PTA4

PTA5

PTA6

R43

R44 1K

100UF/25V

+5V

SW3

+5V

24C01A

R53

R36

3.3K

R35

20K

JSS1270

R79

4.7K

R49 R50

10K 10K

C19

102

C20

102

R48

10K

R46 R47

10K 10K

MC908AB32 CFUE

+5V

BUZZ

4.7UF/50V

E13

E14

R24

10K

CN8

R91

10K

2SC2412

+5V

R28

10K

R29

+12V

+5V

4.7UF/50V

R90

200

IC8

ZJ1

+15V

C11

102

R18

D14

RLS4148

2.7K

TLP421

+15V

E22

4.7UF/50V

R13

R30

D24

1N4007

R14

10K

0.1UF/275VAC

+300v

R17

10K

VR1

CN2

+5V

WH06-2-101

D23

IC10

1N4007

R16

10K

R12

390

104

TLP421

R15

10K

E12

470UF/25V

D22

D21

A057R/A057

C12

102

1N4007

R45

10K

E21

4.7UF/50V

NTC

FR102

5D-15? NTC? 5.0

+15V

222/250VAC/X1Y1

0.1uF 275VAC

C4 0.1UF/275VAC

18V/0.5W

1.5K 10UF/50V

RV1

1N4007

100UF/450V

BCK-6-FE1901

UF4007

CN4

LB2271

470K/2W

222/250VAC/X1Y1

S14K350/550NR-14D

IC7

12V

E11

D10

FR102

7805

C10

104

C13 C14

101 102

E10

1000UF/25V

E19

UF302

IC6

470UF/25V

100UF/25V

10UF/50V

D13

CN9

R65

330

12V/0.5W

R11

R64

R67

R63

R69

TLP421

+5V

E15

IC9

C28

102

103

4.7UF/50V

100UF/25V

R75

LED BOARD

C30

102

C23

102

+5V

+12V

CN17

SW2

+5V

2SC2412

D31

R52

4.7K

R19 R21 R25 R73

4.7k 4.7k 4.7k 4.7k

CN18

IC3

IN4148 G4A-1A-E 12VDC

COMP

R27

R26

R22

R20

R23

22K

FUSE

F3.15A250VAC

+12V CN7

22K

JQ1A

(

)

-12V

CN10

4-W-VALVE

-12V

CN12

JQ1A

(

)

GND

COM

ULN2003A

+12V

OUT FAN

CN1

ION-12V

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