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

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

Fan will stop if compressor stops
Fan is at super low level upon the end of 3 mins standby.
Compressor is on after 3 mins standby.
2-3-2. Compressor is on.
When airflow is set at high, mid or low level, fan will operate as per the setting.
When in automatic airflow mode, airflow is determined as per temperature.

three. Timed Operation

Time counting will start based on the difference of timer clock and current clock.
In timed operation, display panel timer lamp is on.
3-0-1. Timer Off
When timer off is set, panel timer lamp is on and unit will stop operation as per the timing.
3-0-2. Timer On
If timer on is set, when unit is off, panel timer lamp will be on and unit will resume operation as per the
timing and in set mode.
Execution sequence is based on the setting.

Four . Sleep Operation

When remote control set sleep mode, timer lamp is on.

o

4ˉ1. In cooling/dehumidification mode, set temperature will rise 1

o

C after the second hour. The unit will stop after another 6 hours.

1
4ˉ2. In heating mode, set temperature will fall 2
and will rise 1

o

C after another 3 hours and the unit will stop after another 3 hours.

o

C after 1 hour and another 2 oC after the second hour

C after 1 hour operation and another

4ˉ3 If airflow of indoor fan is high before setting sleep mode, then it will turn into mid level after sleep
mode is set. If airflow of indoor fan is mid before setting, it will turn into low level after setting. If airflow of
indoor fan is low before setting, then it will not change after setting.

Five . Automatic Operation

4-1. Automatic Operation Mode:

On entering this mode, main control unit will decide the corresponding operation mode as per room

temperature to maintain the set temperature˄Set temperature is 23ćin heating mode and 26ć in
cooling mode.˅.

Upon initial startup, the unit will enter heating mode if room inlet air temperature is equal to or lower

than 23ć or it will enter cooling mode if temperature is higher than 23ć.

When entering heating mode, the unit will operate as per heating program˄set temperature is 23ć˅

Upon reaching temperature where compressor stops operation, compressor will stop and standby for 3
mins. In case it detects that inlet air temperature is higher than 27ć 15 mins after compressor stops, the
unit will enter cooling mode. Otherwise, the unit will remain in heating mode.

When entering cooling mode, the unit will operate as per cooling program˄set temperature is 26ć˅.

Temperature difference compensation is automatically cancelled. Upon reaching temperature where
compressor stops operation, compressor will stop and standby for 3 mins. In case it detects that inlet air
temperature is equal to or lower than 23ć 15 mins after compressor stops, the unit will enter heating
mode. Otherwise, the unit will remain in cooling mode.

If the unit changes into automatic mode from any other mode and if the operation mode is changed
(detect before operation), the unit will stop for 3 mins and it will operate based on inlet air temperature
after 3 mins.

Six . Trial Operation

Trial operation will end after 30 mins, after which unit shuts down. In trial operation, the unit will quit trial
operation mode upon reception of signal.

Compressor Stop Protection:

26

17

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

Eight . EEPROM Control

When outdoor unit is supplied with power, if there is any inconsistency between EEPROM parameter and
checksum, EEPROM error.
When indoor unit receives EEPROM error signal from outdoor unit, it will display outdoor unit EEPROM error.
At this time, control and emergency operation are not acceptable.
It can only be cancelled through power off.

Nine . Error Detect Method

9-1. Indoor Temperature Sensor Error
In operation, an error occurs if the temperature is above 126

o

C or below – 31oC.
Operation will resume automatically when temperature is outside the above range.
9-2. Heat Exchange Temperature Sensor Error
In operation, an error occurs if the temperature is above 196

o

C or below – 53oC.
Operation will resume automatically when temperature is outside the above range.
In error condition, low load protection is cancelled.

9-4. Transmission Error
Based on the condition of communication between indoor and outdoor unit, in case outdoor unit fails to
receive signal within 20s after indoor unit sends out signal, transmission is abnormal. (except in the period of
first 2 mins when power is supplied.). It is confirmed as transmission error when outdoor unit receive the error
signal.
Transmission error is removed by stopping operation.

Ten . Special Function

10-1. Power-Off Compensation
a Entry Condition: Press sleep key 10 times in 7s and buzzer gives out 4 sounds and save the current status
into indoor unit EEPROM upon the entry.
b. On entering power-off compensation operation, indoor unit operates as per the following procedures:
Remote control emergency signal, and operates as per condition set by remote control and emergency setting
and save the current status into indoor unit EEPROM.
Main unit will operate as per condition set on panel board. And save the current status into indoor unit
EEPROM.
c. Exit Condition: Press sleep key 10 times in 7s and buzzer gives out 2 sounds
d. If timer and sleep features are set under power-off compensation condition, main unit memory is in a state
of shut-off if power is off and on again.

27

18

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

Eleven . Error Presentation Mode

11.1 Three Indicator Error Code

Error Display

Error Conditions

Indoor Senistor Error ƾƵƵ * * 1. Connector loose contact or ambient

Indoor Heat Exchange
Senistor Error
Outdoor Senistor Error ƶƾƵ * * 1. Connector loose contact or sensor error

Indoor Fan Error Ƶƶƾ *

Note ƶOnƾBlinkƵOff * This

PS Timer Operation

Operation Heating Cooling

ƾƶƶ * * 1. Connector loose contact or coil sensor

Indoor

*

* 1. Whether control panel is damaged. EEPROM Error ƾƶƾ

function is

available.

Automatic

Outdoor

Reset

Cause

temperature sensor error.

error.

1. There is large interference source around
or wiring error. Transmission Error ƵƵƾ

* 2. Wiring error or control panel error.

* 1. Whether control panel is damaged.

Twelve . Emergency Switch

When shutdown, press emergency switch down for less than 5s, the unit will start emergency operation.
When shutdown, press emergency switch down for more than 5s but less than 10s, the unit will start trial
operation.
When shutdown, press emergency switch down for more than 10s but less than 15s, it will demonstrate
the previous error.
When shutdown, press emergency switch down, the panel will display automatic operation.
When shutdown, press emergency switch down for less than 15s, or remove hand from emergency
switch, the unit will not accept remote control signal.
Unit enters shutdown condition after 15s.
Unit can receive remote control signal after 15s.
Press emergency switch during operation, air-conditioner will shut down.,
During operation, if error occurs, press emergency switch to shut down the unit to clear error condition.
During error presentation, press emergency switch and error presentation will end.
During operation, if emergency switch is pressed continuously (press and hold) in normal or abnormal
condition (such as tact switch short circuit) or in error presentation condition, the unit can also receive
remote control signal.
Error Record Presentation Mode:
When press and hold switch for 10s it gives out 3 sounds, release switch to enter error record
presentation mode. Press and hold switch for 15s, panel display is off and error record presentation
mode is cancelled.
Previous alarm information will be sent to display panel for status display.
Error record presentation mode is cleared after 10s. (Error record presentation mode is only displayed
for 10s.)
During the presentation, no remote control signal except shutdown signal is accepted.
There is no presentation when no error occurs, only buzzer utters sound.

28

19

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

Outdoor PCB Function Manual

1. Single-unit cooling operation

1.1When the single unit’s indoor unit gives a cooling signal, the corresponding outdoor

compressor carries out cooling operation. During the operation, the outdoor fan operates 1

second before the compressor operates.

1.2When changed from heating to cooling, the compressor stands by for 3 minutes, the

outdoor fan operates to blow off remaining heat and stops 30 seconds later.

1.3When the outdoor ambient temperature T1ı38ć, the outdoor fan runs at the high

speed. There is a return difference of 2ć for the change between high and medium

speed.

When the outdoor ambient temperature T1İ26ć, the outdoor fan runs at the low

speed. There is a return difference of 2ć for the change between low and medium

speed.

When the outdoor ambient temperature T1İ8ć, the outdoor fan is in a cycle of 1

minute stop and 3 minute run. There is a return difference of 2ć for the change

between low speed and run and stop.

1.4Once the fan operates in a mode, it must operate for more than 45 seconds.

There is a temperature cut-off protection: when the indoor coil temperature higher than

T_CPS (68ć) and maintains for 10 seconds, both the compressor and outdoor fan stop.

The compressor will not restart in 3 minutes until the coil temperature lower than T_CP

R(50ć). The indoor fan is controlled the same as the thermostat is OFF.

2. Double-unit cooling operation

2.1When the indoor unit gives out a double unit cooling signal, outdoor compressor A starts

cooling operation. During the operation, the outdoor fan runs 1 second before compressor

A operates, 20 seconds later, outdoor compressor B starts cooling operation.

2.2Once a compressor starts, the other compressor will not start in 20 seconds from the

start.

2.3 When changed from heating to cooling, the compressor stands by for 3 minutes. When

both compressors are in the strand-by status, the outdoor fan stops. Otherwise, it operates.

The status of the fan depends on the number of the compressors that operate.

29

20

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

2.4 When the outdoor ambient temperature T1ı30ć, the outdoor fan runs at the high

speed. There is a return difference for the change between high and medium speed;

When the outdoor ambient temperature T1İ23ć, the outdoor fan runs at the low

speed. There is a return difference for the change between low and medium speed;

When the outdoor ambient temperature T1İ5ć, the outdoor fan is in a cycle of 1

minute stop and 3 minute run. There is a return difference of 2ć for the change

between low speed and run and stop.

2.5Once the fan operates in a mode, it must operate for more than 45 seconds.

2.6 There is a temperature cut-off protection: when a indoor coil temperature higher than

T_CPS (68ć) and maintains for 10 seconds, the corresponding compressor stops. The

compressor will not restart in 3 minutes until the coil temperature lower than T_CP R(50ć).

The indoor fan is controlled the same as the thermostat is OFF.

2.7 In the case of double-unit cooling, one compressor stops and it changes to the

single-unit operation. The fan is controlled in the single-unit operation mode. It stops 30

after blowing off the remaining heat only if both compressors turn off at the same time.

3.Single unit heating operation:

3.1 When the single unit’s indoor unit gives a heating signal, the corresponding outdoor

compressor carries out cooling operation. During the operation, the outdoor fan and 4-way

valve operate 1 second before the outdoor fan operates.

3.2. When changed from cooling to heating, the compressor stands by for 3 minutes, the

outdoor fan stops.

3.3 When the outdoor ambient temperature T1İ3ć, the outdoor fan runs at the high

speed. There is a return difference of 2ć for the change between high and medium

speed.

When the outdoor ambient temperature T1ı13ć, the outdoor fan runs at the low speed.

There is a return difference of 2ć for the change between low and medium speed.

3.4. Once the fan operates in a mode, it must operate for more than 45 seconds.

3.5. There is a high temperature protection and a temperature cut-off protection.

High temperature protection: When the indoor coil temperature higher than T_OFS (56ć),

the outdoor fan stops; when the coil temperature falls to T_OFR (52ć), the outdoor fan

restarts. The outdoor fan stops for more than 45 seconds.

30

21

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

High temperature cut-off protection: When the indoor coil temperature higher than T_CPS

(68ć) and maintains for 10 seconds, both the compressor and outdoor fan stop, and the

indoor fan operates as the thermostat is Off. The compressor will not restart in 3 minutes

until the coil temperature lower than T_CP R(50ć).

4. Double-unit heating operation

4.1 When the double-unit’s indoor unit gives out a heating signal, outdoor compressor A

starts heating operation. During the operation, outdoor compressor A and the 4-way valve

operate 1 second before the fan starts, 20 seconds later, outdoor compressor B starts

heating operation.

4.2Once an outdoor compressor starts, the other compressor will not start in 20 seconds

from the start.

4.3 When changed from cooling to heating, the compressor stands by for 3 minutes. When

both compressors are in the strand-by status, the outdoor fan stops. Otherwise, it operates.

The status of the fan depends on the number of the compressors that operate.

4.4 When the outdoor ambient temperature T1İ10ć, the outdoor fan runs at the high

speed. There is a return difference for the change between high and medium speed;

When the outdoor ambient temperature T1ı20ć, the outdoor fan runs at the low

speed. There is a return difference for the change between low and medium speed.

4.5Once a fan operates in a mode, it must operate for more than 45 seconds.

5. Cooling and heating operations take place at the same time:

5.1 When one of the indoor units gives out a cooling signal and another unit gives out a

heating signal at the same time, the outdoor fan operates at the low speed.

5.2 When the indoor unit gives the value of coil temperature, the outdoor fan runs at the low

speed if the heating outdoor unit judges high load.

5.3When outdoor ambient temperature T1ı28ć, there is no heating operation.

5.4When outdoor ambient temperature T1İ7ć, there is no cooling operation.

5.5Once a compressor starts, the other compressor will not start in 20 seconds from the start.

6.Single-unit heating operation with heat load:

6.1 In the single-unit heating operation, the indoor unit gives out the value of the coil

temperature, and the outdoor unit judges whether to start in the high load protection operation

22

31

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

based on the value of the coil temperature it has received. If the conditions for high load

protection are met, the outdoor fan stops immediately. It will restart 45 seconds later if the

signal for the outdoor heat load disappears. Otherwise, the outdoor fan will continue to stop

until the signal for the outdoor heat load disappears. The signal for heat load is as follows:

High temperature protection: When the indoor coil temperature higher than T_OFS (56ć), the

outdoor fan stops; when the coil temperature falls to T_OFR (52ć), the outdoor fan restarts.

The outdoor fan stops for more than 45 seconds.

High temperature cut-off protection: When the coil temperature higher than T_CPS (68ć) and

maintains for 10 seconds, both the compressor and outdoor fan stop, and the indoor fan

operates as the thermostat is Off. The compressor will not restart in 3 minutes until the coil

temperature lower than T_CP R(50ć).

6.2 In the single-unit heating operation, the current in the compressor is larger than 4.0 A(for

Model 14)(4.8A for Model 18), and the outdoor fan stops. 45 seconds later, the current in the

compressor is less than 3.5A(for Model 14)(4.3A for Model 18), and the outdoor fan operates

in normal condition(the compressor does not detect current within 30 seconds after its start),

the current in the compressor is larger than 3.5A(for Model 14)(4.3A for Model 18) and less

than 4.0A(for Model 14)(4.8A for Model 18), and the outdoor fan does not restore.

7.Double-unit heating operation with heat load

7.1 In the double-unit heating operation, the indoor unit gives out the value of the coil

temperature, and the outdoor unit judges whether to start in the high load protection operation

based on the value of the temperature it has received. If the conditions for high load protection

are met, the outdoor fan stops immediately. It will restart 45 seconds later if the signal for the

outdoor heat load disappears. Otherwise, the outdoor fan will continue to stop until the signal

for the outdoor heat load disappears. The signal for heat load is as follows:

High temperature protection: When the indoor coil temperature higher than T_OFS (56ć),

the outdoor fan stops; when the coil temperature falls to T_OFR (52ć), the outdoor fan

restarts. The outdoor fan stops for more than 45 seconds.

High temperature cut-off protection: When the coil temperature higher than T_CPS (68ć)

and maintains for 10 seconds, both the compressor and outdoor fan stop, and the indoor

fan operates as the thermostat is Off. The compressor will not restart in 3 minutes until the

23

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

coil temperature lower than T_CP R(50ć).

7.2 When the outdoor single-unit gives out the heat load signal, the outdoor fan stops

immediately, 45 minutes later, the heat load signal disappears, and the outdoor fan

operates.

7.3 In heating operation, any of the current in the compressor is larger than or equal to 4.0

A (for Model 14, 4.8A for Model 18), and the outdoor fan stops. The current in the

compressor is less than or equal to 3.5A (for Model 14, 4.3A for Model 18), and the

outdoor fan restores (the compressor does not detect current within 30 seconds after its

start), the current in the compressor is larger than 3.5A (for Model 14, 4.3A for Model 18)

and less than 4.0A(for Model 14, 4.8A for Model 18), and the outdoor fan does not restore.

8. Current peak protection

8.1. The current in the compressor is larger than 6.8A(for Model 14, 8.2A for Model 18) for

more than 5 seconds, The compressor which has the highest current will stop(the

compressor does not detect current within 10 seconds after its start) and 3 minutes later it

will continue to operate.

8.2. The compressor will no longer operate if overcurrent protection occurs 4 times in a row

within 30 minutes, and the output transformer signal fails. In the double-unit operation, if

one of the compressors stops due to the current too high, the other system is a single

system.

9. Single-unit defrosting operation (outdoor judgement)

Defrosting control

9.1. Conditions for starting in the defrosting operation

The heating compressor starts and operate continuously for 10 minutes. After the

compressor has been operating for 45 minutes in total, detecting the defrosting sensor TE

(detecting the frosting of the outdoor heat exchanger) and the outdoor ambient

temperature sensor TA for straight 2 minutes, provided the following conditions are met, it

will start for the defrosting operation: TEİChTAˉ¢

Where,

C: TA˘0ć

33

24

Domestic Air Conditioner

C=0.8

TAı0ć

C=0.6

¢=6

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

In the place where it tends to frost, it is preferred to choose H. In the place where it does not

intend to frost, it is preferred to choose L. It is set M at delivery.

During the defrosting operation, the temperature control starts -15ćİChTAˉ¢İ-2ć

9.2. Interval of defrosting

When the result of the calculation from ChTAˉ¢ falls in the range of -15ćİChTAˉ¢,

the interval between two defrosting operations is 45 minutes.

When the result of the calculation from ChTAˉ¢ falls in the range of ChTAˉ¢<-15ć, the

interval between two defrosting operations is 55 minutes.

9.3. Defrosting operation

At the beginning of defrosting, the compressor is halted for the first one minute, but the

outdoor fan operates, 50 seconds later, the 4-way valve is OFF.

9.4. Once starting to defrost, the compressor must be guaranteed at least 2 minutes of

operation before canceling defrosting. As for the conditions to cancel defrosting, it will restore

to the heating operation from the defrosting operation as long as any of the following

conditions is met.

(1) . The outdoor heat exchanger temperature is above 7 degrees for consecutive 80

seconds.

(2) . The outdoor heat exchanger temperature is above 5 degrees for consecutive 12

seconds.

(3) . The defrosting operation has lasted 9 minutes.

9.5 After the conditions for cancellation of defrosting are met, the following operations will

follow:

The compressor stops, the outdoor fan starts, 50 seconds later, the 4-way valve is engaged,

and 60 seconds later, the compressor operates.

10. Double-unit defrosting operation

After receiving the signal to stop the indoor unit during the defrosting period, the unit must not

34

25

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

be turned off until the outdoor defrosting lasts more than 2 minutes.

When the double units are activated for defrosting, the activation of compressor B is 20

minutes later than that of compressor A.

Conditions for ending defrosting: It will restore to the heating operation from the defrosting

operation as long as any of the following conditions is met.

(1) . The temperatures on both outdoor heat exchangers are above 7 degrees for consecutive

80 seconds.

(2) . The temperatures on both outdoor heat exchangers are above 5 degrees for consecutive

12 seconds.

(3) . The defrosting operation has lasted 9 minutes.

The starting conditions and control process for the double-unit are same as that for single-unit

defrosting, the only difference is that the activation of compressor B lags that of compressor A.

11. Alarming operation

1. When the whole unit is in normal operation, the alarm light is always on, but does not

flash.

2. When the outdoor temperature sensor short-circuited or disconnected, the outdoor fan

always operates at the medium speed and will restore automatically after the sensor

comes to normal.

3. When the temperature sensor short-circuited or disconnected or the current transformer

fails, the alarm light flashes in the following manner; when the current transformer fails,

the signal is sent to the indoor unit that operates abnormally, and the corresponding

indoor unit indicates trouble:

Additional codes for overcurrent

LED light flashes once outdoor Eeprom in trouble
LED light flashes twice outdoor ambient temperature sensor in trouble
LED light flashes 3 times communication with indoor unit A in trouble
LED light flashes 5 times outdoor unit A’s coil in trouble
LED light flashes 6 times outdoor unit A’s CT current too high
LED light flashes 7 times communication with indoor unit B in trouble
LED light flashes 9 times outdoor unit B’s coil in trouble
LED light flashes 10 times outdoor unit B’s CT current too high

35

26

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

ABNORMITY DIAGNOSE

36

27

Codes and Description

H2SM-14/18C03/R2

Code indication

Description

indoor

Indoor

Malfunction

Power timer operate
Operate heating cooling

★ ■ ■
★ □ □

★ □ ★

■ □ ★

Room temperature sensor failure --

Heat-exchange sensor failure --

Indoor EEPROM error ---

Indoor fan motor malfunction --

■ ■ ★ Communication Error (between indoor and outdoor unit)

Outdoor

Malfunction

★　　　　　　□　　　　　　■ Outdoor Senistor Error

outdoor EEPROM error 1

outdoor unit A’s coil sensor failure
outdoor unit B’s coil sensor failure

explanation □on★flash■off

Trouble Shooting

★ ■ ■: Room temperature sensor failure CN8
★ □ □: Heat-exchange sensor failure CN8

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.

The indoor PCB is broken, replace with new indoor PCB

28

whether terminal CN8 on

indoor PCB contact wellt?

YES

Check the value of the

sensor to see whether the

sensor is dama

ged or not?

YES

NO

NO

Pull out the terminals on the indoor mainboard and

reinsert them

Sensor is broken,replace it with new sensor

Outdoor led1

blinks times

3 or 7

2

5

9

H2SM-14/18C03/R2

★ □ ★: Indoor EEPROM error: Replace the PCB of indoor unit

■ □ ★:Indoor fan motor malfunction

whether terminal CN7

and CN11 on indoor PCB

well inserted or not?

YES

Pull out and reinsert the terminals

Electrify the machine again and turn it on in the cooling

operation, Measure voltage between the positions 1 ( red

wire)

and 5( black wire) of Terminal CN1 on the indoor PCB

NO

. the voltage is about

90-200vac

NO

the indoor pcb is damaged and need replace

check whether motor

can run when
turn on the unit

Yes

NO

the indoor motor is damaged and need
replace

Yes

When motor is running Measure
whether there is voltage
pulse(0-5VDC) between the

positions 2 (middle wire) and

black wire) of Terminal CN7

3(

on the indoor PCB

NO

the indoor motor is damaged and need
replace

the indoor pcb is damaged and need replace

29

H2SM-14/18C03/R2

LED1 of outdoor pcb flashes once: outdoor EEPROM error: Replace the PCB of outdoor unit,

★ □ ■

LED1of outdoor pcb flashes twice: Outdoor ambient Sensor failure CN1,

whether terminal CN1 on

outdoor PCB contact well?

NO

Pull out the terminals on the outdoor mainboard and

reinsert them

YES

Pull the sensor out of the mainboard

3) Measure the value of resistance Between its two

jumpers

4) Measure the temperature of

Outdoor ambient

Check the value of the

sensor to see whether the

sensor is dama

ged or not?

NO

Sensor is broken,replace it with new sensor

YES

The outdoor PCB is broken, replace a new one

30

H2SM-14/18C03/R2

■ ■ ★ :Communication fault between indoor and outdoor system

Yes

Check whether the linking cable

between the indoor and outdoor
is not well connected

Reconnect the linking cable;

NO

If unit A have error , please turn

Yes

on A and B both，check whether B
is fine

NO

YES

please check whether the
connecting of L or N is reversed of
the two units

NO

YES

Check whether the LED1
on the outdoor pcb is on

NO

check whether the voltage of

NO YES

CN7 in outdoor pcb is about
198-253VAC

NO

YES NO

NO

check whether the voltage of
CN4
in outdoor pcb is about 12VAC

YES

the outdoor PCB is damaged

please reverse the outdoor
connecting wires A(C) and B (C)
between unit A and B,

reconnect the L and N wires

the outdoor PCB is damaged

check whether fuse of outdoor
pcb is broken

check whether the wire from
terminal block to out pcb is well
connected

the transformer is bad

if A is error and B is fine, indoor
unit A PCB is damaged

if A is fine and B has error,the
outdoor unit main PCB is damaged

reaplace the fuse with
T3.15A 250V

Reconnect the linking
wire

31

H2SM-14/18C03/R2

LED1 of outdoor pcb flashes 5 or 9 times outdoor unit A or B’s coi sensor failure CN2

whether terminal CN2 on

outdoor PCB contact well?

NO

Pull out the terminals on the outdoor mainboard and

reinsert them

YES

Pull the sensor out of the mainboard

5) Measure the value of resistance Between its two

jumpers

6) Measure the temperature of

B’s coi

outdoor unit A or

Check the value of the

sensor to see whether the

sensor is dama

ged or not?

NO

Sensor is broken,replace it with new sensor

YES

The outdoor PCB is broken, replace a new one

32

Domestic Air Conditioner

WIRING DIAGRAM

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

33

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

38

349

34

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

40

35

Domestic Air Conditioner

Model: H2SM-14HC03/R2

CIRCUIT DIAGRAM

H2SM-18HC03/R2

4

36

H2SM-14/18C03/R2

CN4

ＣＮ８

1
2
3
4

+5V

SJ20-07WX

Ｃ４９

Ｒ８３

２．２Ｋ

ＬＥＤ１

IC2

SDA

6

SCL

7
8 1

２４Ｃ０２

ＲＬ１

CN5

ＧＲＥＥＮ

220V-N

8

1
2
3
4

61

5
6

53

7

52

51

Ｄ８

Ｄ６

45
3
2

ＣＯＮ１（ｒｅｄ）

1

ＣＯＮ２（ｗｈｉｔｅ）

1

Ｃ３８

１０２／５０Ｖ

Ｃ２５

１０２／５０Ｖ

Ｃ２７

１０２／５０Ｖ

Ｃ２６

１０２／５０Ｖ

１Ｎ４００７

１Ｎ４００７

Ｒ８４

６．８Ｋ　２Ｗ

D

C

1

ＣＯＮ５

B

Ｎ

1

A

+5

Ｒ３７

Ｒ３６

Ｃ２９
１０４／５０ｖ

Ｒ５４
６８０

Ｒ４３
３．３Ｋ

Ｃ５ １０２

１０Ｋ

１Ｋ

+5V

Ｒ２０ １０Ｋ

ＣＮ１３

ＳＷ３

Ｒ１５
１０ｋ

２ＳＣ２４１２

+5V

Ｒ４ ４．７Ｋ
Ｒ３８ １０Ｋ
Ｒ３９ ４．７Ｋ

5v

Ｒ９１

+12

+5

Ｒ１６
１０ｋ

Ｒ１７
１０ｋ

Ｑ１１

２ＳＣ２４１２

Ｑ４

Ｒ９

Ｒ２９ １０Ｋ

Ｒ５

Q8

１０Ｋ

2SB1197

３．３Ｋ

Ｒ５１

Ｒ５２

Ｃ１３

１０Ｋ

１０４

Ｒ４０

+5V

Ｒ６４ １０Ｋ

+5

+5

Ｒ２１ １０Ｋ

Ｒ７３

Ｒ５８ １０Ｋ

１０Ｋ

４．７Ｋ

Ｃ１９

１０４

12345

89

10111213141516

Ｒ８９２２Ｋ

Ｒ６５

１０ｋ

Ｒ１８
４．７ｋ

Ｃ３６

１０３／５０ｖ

Ｃ１２
１０２

Ｒ４１

１Ｋ

０２ ＩＲＱ

４．７Ｋ

０７

ＰＴＦ３／ＴＢＣＨ３

11

PTF5

12

PTF6

４８

ＰＴＨ１／ＫＢＤ３

４９

ＰＴＨ１／ＫＢＤ４

０８

ＰＴＦ４／ＴＢＣＨ０

０３

ＲＳＴ

２１

ＶＳＳ ＧＮＤ

４５
５６

ＶＳＳＡ ＧＮＤ

６０

ＰＴＣ０

１０

ＰＴＦ７

５７

ＣＧＭＸＦＣ

０９

ＮＣ

１３

ＰＴＥ０／ＴＸＤ

１４

ＰＴＥ１／ＲＸＤ

１５

ＰＴＥ２／ＴＡＣＨ０

２５

１０Ｋ

ＰＴＧ２／ＫＢＤ２

１６

ＰＴＥ３／ＴＡＣＨ１

１７

ＰＴＥ４／ＳＳ

１８

ＰＴＥ５／ＭＩＳＯ

２３

ＰＴＧ０／ＫＢＤ０

２４

ＰＴＧ１／ＫＢＤ１

Ｒ９３

３５

ＰＴＢ１／ＡＴＤ１

１０Ｋ

２６

ＰＡ０

２７

ＰＡ１

２８

ＰＡ２

２９

ＰＡ３

D

３０

ＰＡ４

３１

C

ＰＡ５

３２

B

ＰＡ６

３３

A

ＰＡ７

３８ ＰＴＢ４

1234567

５０ ＰＴＤ４

IC4

２００３

Ｒ２５

Ｒ３２
１０Ｋ

１０Ｋ

470UF/16V

ＧＮＤＡＶＳＳ／ＶＲＥ

ＭＣ６８ＨＣ９０８ＡＢ３２

E15

ＰＴＢ２／ＡＴＤ２
ＰＴＢ３／ＡＴＤ３

ＰＴＦ０／ＴＡＣＨ２ ０４
ＰＴＣ１
ＰＴＣ５
ＰＴＣ３
ＰＴＣ２／ＭＣＬＫ
ＰＴＤ７
ＰＴＤ６／ＴＡＣＬＫ ５２

ＯＳＣ１

ＯＳＣ２
ＶＲＥＦＨ

ＶＤＤＡ

ＰＴＥ６／ＭＯＳＩ

ＰＴＥ７／ＳＰＳＣＫ

ＰＴＦ２／ＴＢＣＨ２
ＰＴＦ１／ＴＡＣＨ３
ＶＤＤＡＲＥＦ ４４

ＰＴＤ２
ＰＴＤ１
ＰＴＤ０
ＰＴＢ７／ＡＴＤ７
ＰＴＤ６／ＡＴＤ６
ＰＴＢ５／ＡＴＤ５

ＰＴＢ０／ＡＴＤ０

7805

C17
104

２２

ＶＤＤ

３６
３７

６１
６４
６３
６２
５３

５１ＰＴＤ５
５９

５８

５５
５４

１９

２０

０６
０５

４７ＰＴＤ３
４６
４３
４２
４１
４０
３９

０１

ＰＴＣ４

３４

1N4007

IC9

Ｒ９２
１０Ｋ

Ｃ１５
１０２

C35
104

１００ｕ／２５ｖ

Ｃ１８
１０４／５０Ｖ

Ｒ１
１Ｍ

Ｒ４６

１Ｋ

+12+5

Ｅ９

Ｃ１０
１０２

Ｃ４１
１０２

13

ＸＴ１

８Ｍ

+5

Ｒ２４
１０Ｋ

1

2

E8

2200UF/25V

+12

+5

Ｅ５
１００ｕ／１６ｖ

Ｃ９
１０２

2

Ｒ４７ ５６０　１／４Ｗ

ＺＪ１

D5

Ｃ４２
１０４／５０Ｖ

Ｃ４

１０４

Ｃ２２
１０２

Ｒ６

１０Ｋ

Ｒ９７

１０Ｋ

IN4007

Ｒ８６

Ｒ９５

Ｒ９６

１０Ｋ

１０Ｋ

D1-D4

Ｃ２８
１０４／５０Ｖ

+5

Ｃ３
１０３

Ｒ８５ ２．２Ｋ　１／４Ｗ

１０Ｋ　１／４Ｗ

Ｒ９８

Ｒ３３

１０Ｋ

１０Ｋ

5v

CN3

0-171825-3

+5

Ｅ４
１００ｕ／１６ｖ

Ｒ８７

１０Ｋ　１／４Ｗ

Ｑ９
２ＳＣ２４１２

+5

Ｃ６

103/50V

Ｒ２６
１０Ｋ

5v

ＳＷ２

ＢＥＥＰ－ＰＫＭ１３ＥＰＹ－４００２

ＢＵＺ１

+12v

Ｒ１１

１０Ｋ

Ｒ４９
１００

Ｑ５
２ＳＣ２４１２

Ｒ２８ １Ｋ

+5

Ｃ１
１０２

4
3
2

ＣＮ６

1

+5V

Ｒ５７

２２０

2
1

Ｒ１０ １０Ｋ

1
2
3

Ｒ６６ ２７

ＳＷ１

+5

220V-L

Ｃ３９

２ＵＦ　４５０Ｖ

Ｒ４２

Ｌ１

１２５ｕＨ

Ｒ１３ １０Ｋ Ｒ１２

+5

Ｒ２７ １０Ｋ

Ｒ３０

１０Ｋ

Ｒ３１

１０Ｋ

Ｃ２ １０４

Ｒ５０

Ｒ１４ １Ｋ

Ｃ４３
１０３

Ｃ２４

０．０１ｕ／２７５Ｖ１２０　　１Ｗ

Ｑ１０

２ＳＣ２４１２

１０Ｋ

Ｑ１
２ＳＣ２４１２

Ｒ５９
４．７Ｋ

Ｑ２
２ＳＣ２４１２

+5V

Ｒ２

１０Ｋ

Ｒ３

１Ｋ

+5V

５１Ｋ

Ｃ１６
１０２

Ｑ３

220V-N

２ＳＣ２４１２

IC10

ＴＬＰ３５２６

D

ＣＮ９

+12V

C

ＣＮ７

ＣＮ１

B

1
2
3

A

7654321

CN2

104/275V

T1

C40

RTB-1.5-2P

Ｒ４５ １Ｋ

Ｒ４４ １Ｋ

Ｒ３４

２０Ｋ　１％

Ｒ３５ ３．３Ｋ　１％

R69 10K
R68 10K
R67 10K

+5

Ｒ８２

３３０　１／４Ｗ

+5

１

２４

Ｒ８０

２．２ｋ　１／４Ｗ

４

３

Ｃ７

ＴＬＰ４２１

104/50V

+5V

Ｒ７

Ｒ８

Ｃ１４
１０４

Ｄ７

ＲＬＳ４１４８

.

561K

Z1

Ｅ７ ４．７ＵＦ／５０Ｖ

Ｅ６

Ｃ４７

１０４／５０Ｖ

６

ＩＣ１４
ＴＬＰ３７１

+5

IC12

１０Ｋ

１０Ｋ

FUSE

3.15A

４．７ＵＦ／５０Ｖ

R53 1K
R88 560

R70 560
R71 560
R72 560

Ｒ８１

３３０Ｋ　１／４Ｗ

+12

+5V

Ｅ１３
１００ｕ／２５ｖ

５

１
１０３／５０Ｖ

２

B2P3-VH-A

+5

ＪＱ１Ａ－１２Ｖ

1 2 3 4 5 6 78

37

43

38

Domestic Air Conditioner

Model: H2SM-14HC03/R2

TROUBLE SHOOTING

H2SM-18HC03/R2

44

39

Domestic Air Conditioner

Domestic Air Conditioner

Domestic Air Conditioner

Model: H2SM-14HC03/R2

Model: H2SM-14HC03/R2

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

H2SM-18HC03/R2

H2SM-18HC03/R2

50

40

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

REFRIGERATING-CYCLE DIAGRAM

46

41

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

Warning and cautions :

1.1 The multi-mounted split unit adopts double separated cooling systems (A and B) that are not connected together. If
the refrigerant leaks, the leaking system of them must be determined. So we can solute the abnormality. And refill the
system that lacks refrigerant. It w ill influenc e the effect if the A and B syst ems are wr ongly estimated.

1.2 The maximum length of single connecting pipe is 7m. And the units c an't run normally if the pipe is over required
length.

1.3 Fill refrigerant in acc ordance w ith the diagram below if the connec ting pipe is over 5m.

Length 5m 7m ----

5HIULJHUDQWFKDUJH 12 J 

9DFXXPSXPSLQJRIWKHV\VWHP
9DFXXPSXPSLQJLVWRPDLQO\GUDZRXWUHVLGXDODLUDQGZDWHULQWKHDLUFRQGLWLRQHUUHIULJHUDQWV\VW HP
*HQHUDOO\YDFXXPSXPSLVFRQQHFWHGDWWKHSURFHVVLQJSRUWRIWKHZD\VWRSYDOYHLQWKHRXWGRRUXQLW
7KHV\VWHPYDFXXPGHJUHHLVUHTXLUHGWREHEHORZ3D

5HIULJHUDWLQJF\FOHGLDJUDP



Outdoor unit



Heat exchanger

Capillary tube

Capillary tube

2- way valve




2- way valve







Capillary tube

B Compressor

Capillary tube

B indoor unit
Heat exchanger

A indoor unit
Heat exchanger




3- way valve







A 4-way valve

B 4-way valve

3- way valve








A Compressor

Cooling

Heating

42

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

NOISE LEVEL TEST CHART

& AIR VELOCITY DISTRIBUTION

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43



G%$

Domestic Air Conditioner

LQGRRU
XQLW

RXWGRRU
XQLW

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

G%$

















+] +] +] +] +] +] +] +]













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44

B.Air velocity distribution

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

45

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

INSTALLATION & MAINTENANCE

46

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

47

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

48

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

49

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

50

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

3(C)

2

1

Indoor unit A

3(C)

2

1

Indoor unit B

WHT

WHT

YEL/GRN

RED

BLK

YEL/GRN

RED

BLK

BLK

BLK

WHT

WHT

RED

RED

51

YEL/GRN

YEL/GRN

POWER

{

BRN

BLU

YEL/GRN

1

2

3

1

2

3

L

N

Outdoor unit

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

52

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

53

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

54

Domestic Air Conditioner

Model: H2SM-14HC03/R2

H2SM-18HC03/R2

55