Haier H2SM-14HC03/R2, H2SM-18HC03/R2 Schematic

Domestic Air Conditioner

SERVICE MANUAL

Models :

H2SM-14HC03/R2

H2SM-18HC03/R2

Features

Comfortable:wide-angle airflow
Health air purifying
Quiet operation
Engergy efficient
Wide variety of functions

Serial Number: Versio n:00.00 Edition: 2005-3-25

1

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Content

1. Description of product model coding and series introduction

2. Specifications

3. Curves of performance

4. Description,net dimensions and functions of main component s
and accessories

5. Brief introduction to electrical control functions

6. Abnormity diagnose

7. Wiring diagram

8. Circuit diagram

Trouble shooting

9.

10. Refrigerating cycle diagram

11. Noise level test chart and air veloc ity distribution

12. Installation manual

2

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Description of product model
coding and series introduction

3

Domestic Air Conditioner

A. Description of coding rules of unit model

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

1

2

3

4

5

6

7

8

9

Developing sequence

10

The type of power supply

C-cooling only

Function code

H-heat pump
e-electric aided heating

numbers based on thousand unit

The structure code of indoor & outdoor unit

The quantity of the indoor unit is two

H-Abbreviation of Haier

Examples:

H2SM-18HB03/R2,It represents wall-mounted multi-type split type room air conditioner.The cooling capacity
is 18000BTU/h,and the power supply is 220-230V/50Hz,”B” means the improvement

B.Standard Situation/Conditions

indoor air status

No.

1

2

3

Operating condition

Norminal cooling

Norminal heating

Norminal electrical
heating

DBOC WBOC

27OC 19OC 35OC 24OC

20OC 15OC

--- --- --- ---

outdoor air status

DBOC WBOC

7OC 6OC

4

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

C.Series brief introduction

1.comfortable:wide-angle airflow
The vertical dual-flap and horizontal wide-angle louvers ensure the cool(warm air reaches every
corner of the room.

2.Health air purifying and negative ion function
An air purifying filter with deodorizing and disinfecting functions keeps the air clean and users

healthy.The negative ion generator can produce the negative ion that make the air fresher and cleaner.

3.Quiet operation
Fan With Random-pitched Blades.
Random-pitched blades help reduce operating noise while maintaining a high airflow rate.

2.Engergy efficient
The design of inner-grooved copper tube greatly increases the refrigerant contact area and the
efficiency of cooling/heating functions.

5.Convenience
Auto restart and washable panel:
The grille can be removed easily and washed when necessary.Any series have the function then
even if the power falls when the unit is operating unit will automatically return to the operating
settings in use before the power failure when power is restored.

6.Wide variety of functions
24-Hour Timer:
24-hour timer allows users to select the exact time they would like the air conditioner to turn on
and to turn off.Timers on previous models operation based on the number of hours of desired
operation.

7.Night-set models
When the air conditioner is operationg on the timer-off circuit.The preset room temperature
gradually rises(going down in heating)before the unit stops as shown delow.Users can sleep
comfortably without sudden change in temperature.

8.Program”dry”
This function automatically reduces the level of humidity while maintaining the preset indoor
temperature.

5

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Specifications

OF COMPRESSOR

8

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

CURVES OF PERFORMANCE

45

50

55

60

50

55

60

455045

55

60

60

55

50

45

9

Domestic Air Conditioner

Performance Curve

Return Gas Temperature

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

35

C

Model
Power Supply
Run Capacitor

2500
2330
2160
1990
1820
1650
1480
1310

Capacity (Kcal/Hr)

1140

970
800

-8-7-6-5-4-3-2-10123456789101112

900
865
830
795
760
725
690
655

Power (Watts)

620
585
550

-8-7-6-5-4-3-2-10123456789101112

4.00

3.85

3.70

3.55

3.40

3.25

3.10

2.95

Current (Amps)

2.80

2.65

2.50

-8-7-6-5-4-3-2-10123456789101112

55.0

51.5

48.0

44.5

41.0

37.5

(Kg/Hr)

34.0

30.5

Flow

27.0

23.5

20.0

-8-7-6-5-4-3-2-10123456789101112

39A173A
220-230V / 50Hz / 1PH
25 μF / 370 VAC

Subcooling

Ambient Temperature

C

8.3

C

35

Cond. Temperature

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

O

C

Evaporating Temperature( )

C

10

Performance Curve

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Return Gas Temperature

35

C

Model
Power Supply
Run Capacitor

3500
3300
3100
2900
2700
2500
2300
2100

Capacity(Kcal/Hr)

1900
1700
1500

-1

1150
1110
1070
1030

990
950
910
870

Power (Watts)

830
790
750

-1

5.3

5.1

4.9

4.7

4.5

4.3

4.1

3.9

Current (Amps)

3.7

3.5

3.3

-1

70.0

66.8

63.6

60.4

57.2

54.0

(Kg/Hr)

50.8

47.6

Flow

44.4

41.2

38.0

-1

44A233A

Subcooling

220-230V / 50Hz / 1PH
40 uF / 370 VAC

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

Ambient Temperature

C

8.3

C

35

Cond.Temperature

45

C

50

C

55

C

60

C

11 12

10

60

C

55

C

50

C

45

C

11 12

10

60

C

55

C

50

C

45

C

11 12

10

45

C

50

C

55

C

C

60

11 12

10

Evaporating Temperature( )

C

11

Domestic Air Conditioner

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

DESCRIPTION, DIMENSION

& FUNCTION OF MAIN

COMPONENTS AND ACCESSORIES

12

Domestic Air Conditioner

Description and function of main components and accessories

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

13

Domestic Air Conditioner

Net dimensions for indoor unit

Model: H2SM-14HC03/R2
H2SM-18HC03/R2

265

Net dimensions for outdoor unit

295

795

182

319.5
352

680

583
815

869

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

BRIEF INTRODUCTION TO

ELECTRICAL CONTROL FUNCTION

14

23

one. Temperature Control Function

In temperature control function, the operation frequency of outdoor unit is determined based on room
temperature and the set temperature.
In automatic fan speed mode, indoor fan is controlled based on the need of temperature control
In heating mode, indoor fan is controlled based on the temperature of coil.
1-1-1.Specification of Indoor Ambient Temperature Sensor
In case of short circuit or open circuit, indicator lamp alarms and indoor fan stops. When normal condition is resumed,
fan will automatically restart and operate normally.
Short Circuit:
Temperature: over 126
Normal Temperature:
Temperature: 25
Open Circuit:
Temperature: below -31

0.15V.
B Parameter = 4200 R (25
1-1-2 Specification of Indoor Coil Temperature Sensor
B Constant Number = 3700 R (25
1-1-3 When heating operation starts and indoor fan stops or when within 30s of indoor fan starts after
heating operation starts, the resistant of indoor ambient temperature sensor is ignored. (to avoid the
impact of heat exchanger temperature over it.)
When forced operation ends after start-up, temperature zone control begins.
1-3. Set Temperature Correction
Set temperature is corrected according to unit model, operation mode, fan speed and whether it is in
power operation.
Fan speed correction is available only during low and mid heating operation.

1-4. Temperature Zone Control
1-4-1.Error
Temperature zone error is calculated as per the following formula
In Heating Mode: E = (Remote Control Set Temperature + Correction Value) – Indoor Temperature
In Cooling & Dehumidification Mode: E = Indoor Temperature - (Remote Control Set Temperature +

Correction Value)

1-4-2 Compressor Shutdown
E is negative and |E|>T

T TCHAHL 0.67 TCHACL 0.33
After change of T TCHAHH 0.67 TCHACH 1

T Change Condition When operation starts E ı 3.0ć,

Compressor shuts down after continuous testing for 120s,
At the beginning of operation, with reference to the conditions given in above table, it operates based
on the parameters after change of T until compressor shuts down for the first time. In the time period
between compressor shutdown and restart, it operates based on T. (except in dehumidification mode)
Compressor starts at the beginning of operation or upon switch of operation mode (except standby ends)
or when E (error) > -T.
When compressor is operating, remote control set temperature is changing towards the direction of
compressor shutdown and when it is below –T, compressor will shut down.
2-4-3. Compressor Operation
Compressor restarts when E (error) > -ƸT+0.67ć and when 3 mins standby is over.

o

C, Hexadecimal System: over F8H, Resistance: below 0.65K,Voltage: over 4.85V.

o

C, Hexadecimal System: 40H, Resistance: 23K, Voltage: 2.33V.

o

C, Hexadecimal System: below 08H, Resistance: below 620K Voltage: below

o

C) = 23K

o

C) = 10K¡

:

Heating Cooling

24

15

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

two. Indoor Fan Control

2-1. Heating
2-1-1. Warm Start

Two. Cold Air Control in Heating Mode

Heat Exchange Temperature:

THHOT3

37.0ď

THHOT2

35.2ď

THHOT1

25.2ď 4mins

THHOTR

16ď

Stop SLO LO Set LO SLO Stop

Conduct indoor fan control as per the above diagram and the heat exchange temperature.

1. Judge wind speed when heat exchange temperature is rising:

Fan is at super low level when heat exchange temperature is below 35.2ć.˄Fan will stop upon
initially energized into heating mode or after defrosting, or when heat exchange temperature is lower
than 25.2ć. Fan is at super low level when temperature is higher than 25.2ć but lower than 35.2

ć.˅;
Fan is at low level when heat exchange temperature is between 35.2ć and 37ć;
Fan will operate as per setting when heat exchange temperature is above 37ć.

2. Judge wind speed when heat exchange temperature is falling:

Fan is at low level when heat exchange temperature is below 35.2ć but above 25.2ć;

Fan is at super low level and will maintain the mode when heat exchange temperature is lower than

25.2ć˄Fan is at super low level upon initially energized into heating mode or after defrosting, or

heat exchange temperature is lower than 25.2ć but higher than 16ć; Fan will stop when heat

exchange temperature falls below 16ć.˅

3. Wind speed is at super low or low level when heat exchange temperature is rising. If heat exchange
temperature fails to enter the next temperature zone after 4 mins while wind speed rises to the next
stage, it is necessary to maintain the set wind speed for 4 mins before it is adjusted based on heat
exchange temperature.

4. When heat exchange temperature is falling, wind speed will return to set speed if low wind level is
maintained for over 4 mins.

2-1-2. 3 mins standby period when compressor shutdown.

1. When compressor shuts down˄temperature sensor is off˅, airflow is low for the initial 20s then

reduced to super low (When in silent operation, it is SSLO);

2. Wind is maintained at super low level in the standby period in heating mode˄Compressor stops during

mode switch.˅.

3. Remote control shut down and stop indoor fan.

2-1-3. Compressor Restart
When warm start, airflow is at remote control set level.
When in automatic airflow mode, airflow is determined based on temperature.
Refers to temperature zone control functions.
2-2 Cooling
Airflow is different when airflow is set at high, mid and low level.
When in automatic airflow mode, airflow is determined as per temperature. Refers to temperature control
functions.
2-3. Dehumidification
2-3-1. Compressor is off and is in 3 mins standby.

25

16