Haier HSU18VH7 User manual

Domestic

Air conditioner

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.

HSU18VH7

Air conditioner Edition: 10070808

CONTENTS

1. GENERAL INFORMATION................................................................1

2. SPECIFICATION................................................................................3

3. ELECTRICAL CONTROLS ...............................................................4

4. TROUBLESHOOTING.....................................................................10

5. INSTALLA TION................................................................................12

6. WIRING DIAGRAM...........................................................................20

7. THERMISTOR RESISTANCE CHART..............................................22

8. COMPRESSOR PERFORMANCE DIAGRAM.................................24

9. SCHEMATIC DIAGRAM OF PCB....................................................25

Air conditioner Edition: 10070808

- 1 -

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.

HSU18VH7

10070808

Product Features

FAN SPEED

TEMP

SIGNAL SENDING

SLEEP

HEALTH

POWER ON/OFF

18000/17800 BTU

1580/1560W/7/7.5A

SEER:13.0/13.0

18000/18000 BTU

1520/1480W/6.7/7.2A

HSPF:7.7/7.7

500 CFM

1PH 230/208V ~ 60Hz

HSU18VH7

18000/17800 BTU

18000/18000 BTU

1580/1560W/7/7.5A

1520/1480W/6.7/7.2A

13.0/13.0

7.7/7.7

1350rpm

500/480/450CFM

1260rpm

1180rpm

900/830rpm

Toshiba/PA160X2CS-3KUU

750ml

47/46/44 47/45/44

60/62

600Psig

40lbs

116lbs

124lbs

R410A/67.4Oz

-7℃～43℃

1 PH 230/208V / 60Hz

3G2.5mm2

YR-H24

50g

Φ16mm

Φ6.35/12.7mm

3/15m

33.6lbs

SEER

HSPF

5.2 Pints/hr

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

IP24

Φ16mm

Indoor(H/M/L)

Outdoor

(High/Med/Low)

(dB)

10070808

Low pressure at cool side

10070808

60 86 F

3.1 Basic Function

Air conditioner Edition: 10070808

- 5 -

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

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℃ running refrigerating mode Ts=26℃

b. Tr<23℃ 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.

Indoor temperature control

Compressor ON

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

per setting wind speed (State 1);

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.

(State 3)

Heating

-1 +1

Compressor OFF

Setting temperature

Compressor OFF

压机关

Setting temperature

Refrigerating

-1

Compressor ON

3.2.1

3.2.2

3.2.3

3.2.3.1

3.2.3.2

3.2.3.3

- 6 -

Air conditioner Edition: 10070808

State1

State2

State3

Ts-1 Ts Ts+2 Ts+3

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.

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.

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;

3.2.4

3.2.5

3.2.6

- 7 -

Air conditioner Edition: 100070808

Note: Sequence of defrosting actions:

9(or 7)minutes

Compressor ON

OFF

Four-way valve ON

OFF

Outdoor fan ON

OFF

55s 55s

1min 1min

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

0 7 Tp(℃.)

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.

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:

58℃≤Tp, outdoor fan ceases; Tp≤54℃, outdoor fan resumes; the time

from ceasing to resuming is about 45 seconds;

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;

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

3.2.7

3.2.8

3.2.9

3.2.10

- 8 -

Air conditioner Edition: 10070808

temperature, sleep state, flap state.

. 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.

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.

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.

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

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

Sleeping function

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

Ts Sleep OFF t(hour)

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

following rules:

T(℃)

Ts 3hours 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

3.2.11

3.2.12

3.2.13

3.2.14

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