Haier H2SM-14HC03/R2 User manual

Domestic Air Conditioner
SERVICE MANUAL
Models :
H2SM-14HC03/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
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
9.Trouble shooting
10. Refrigerating cycle diagram
11. Noise level test chart and air velocity distribution
12. Installationmanual
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Description of product model
coding and series introduction
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

No.
1
2
3
Operating condition
Norminal cooling
Norminal heating
Norminal electrical
heating
indoor air status
DBOC WBOC
20OC 15OC
DBOC WBOC
7OC 6OC
outdoor air status
--- --- --- ---
B.Standard Situation/Conditions
27OC 19OC 35OC 24OC
A. Description of coding rules of unit model
The type of power supply
Developing sequence
Function code
H-heat pump
e-electric aided heating
numbers based on thousand unit
The structure code of indoor & outdoor unit
H-Abbreviation of Haier
345678
1910
C-cooling only
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
2
The quantity of the indoor unit is two
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.
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Specifications
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

CURVES OF PERFORMANCE
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Performance Curve ReturnGas Temperature 35
Model 39A173A Subcooling 8.3
Power Supply 220-230V / 50Hz / 1PH
RunCapacitor 25 F/ 370 VAC AmbientTemperature 35
Cond. Temperature
800
970
1140
1310
1480
1650
1820
1990
2160
2330
2500
-8-7-6-5-4-3-2-10123456789101112
Capacity (Kcal/Hr)
45
50
55
60
550
585
620
655
690
725
760
795
830
865
900
-8-7-6-5-4-3-2-10123456789101112
Power (Watts)
2.50
2.65
2.80
2.95
3.10
3.25
3.40
3.55
3.70
3.85
4.00
-8-7-6-5-4-3-2-10123456789101112
Current (Amps)
20.0
23.5
27.0
30.5
34.0
37.5
41.0
44.5
48.0
51.5
55.0
-8-7-6-5-4-3-2-10123456789101112
Evaporating Temperature()
Flow (Kg/Hr)
C
C
C
C
O
C
O
C
O
C
O
C
50
55
60
OC
OC
O
C
O
C
45
50
45
55
60
O
C
O
C
O
C
O
C
60
O
C
55
OC
50
OC
O
C
45
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Performance Curve ReturnGas Temperature 35
Model 44A233A Subcooling 8.3
Power Supply 220-230V / 50Hz / 1PH
RunCapacitor 40 uF/ 370 VAC AmbientTemperature 35
Cond.Temperature
1500
1900
2100
2300
2500
2700
2900
3100
3300
3500
Capacity (Kcal/Hr)
750
790
830
870
910
950
990
Power (Watts)
3.3
3.5
3.7
3.9
4.1
4.3
4.5
4.7
4.9
5.1
5.3
Current (Amps)
38.0
41.2
44.4
47.6
57.2
70.0
Evaporating Temperature( )
Flow (Kg/Hr)
C
C
C
55
C
C
60
C
50
C
45
55
C
C
60
C
50
C
45
C
45
C
50
55
C
C
60
C
45
C
50
55
C
C
60
1700
012345678910 11 12
-1
012345678910 11 12
-1
012345678910 11 12
-1
012345678910 11 12
-1
50.8
54.0
60.4
63.6
66.8
1070
1110
1150
1030
C
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

DESCRIPTION, DIMENSION
& FUNCTION OF MAIN
COMPONENTS AND ACCESSORIES
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

Description and function of main components and accessories
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

795
265
182
Net dimensions for outdoor unit
583
815
869
680
319.5
352
295
Net dimensions for indoor unit
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2

BRIEF INTRODUCTION TO
ELECTRICAL CONTROL FUNCTION
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2
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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 126oC, Hexadecimal System: over F8H, Resistance: below 0.65K,Voltage: over 4.85V.
Normal Temperature:
Temperature: 25 oC, Hexadecimal System: 40H, Resistance: 23K, Voltage: 2.33V.
Open Circuit:
Temperature: below -31 oC, Hexadecimal System: below 08H, Resistance: below 620K Voltage: below
0.15V.
B Parameter = 4200 R (25 oC) = 23K
1-1-2 Specification of Indoor Coil Temperature Sensor
B Constant Number = 3700 R (25 oC) = 10K¡
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
Heating Cooling
T TCHAHL 0.67 TCHACL 0.33
After change of T TCHAHH 0.67 TCHACH 1
T Change Condition When operation starts E ı3.0ć,
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+0.67ćand when 3 mins standby is over.
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2
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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
25.2ď4mins
THHOTR
16ď
Stop SLO LO Set LO SLOStop
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 25.2ćbut lower than 35.2
ć.˅;
Fan is at low level when heat exchange temperature is between 35.2ćand 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 35.2ćbut 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 25.2ćbut 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.
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2
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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.
4ˉ1. In cooling/dehumidification mode, set temperature will rise 1oC after 1 hour operation and another
1oC after the second hour. The unit will stop after another 6 hours.
4ˉ2. In heating mode, set temperature will fall 2 oC after 1 hour and another 2 oC after the second hour
and will rise 1oC after another 3 hours and the unit will stop after another 3 hours.
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 26ćin
cooling mode.˅.
Upon initial startup, the unit will enter heating mode if room inlet air temperature is equal to or lower
than 23ćor 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 27ć15 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 23ć15 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:
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2
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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 oC 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 oC 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.
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2
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Eleven . Error Presentation Mode
11.1 Three Indicator Error Code
Error Display
Error Conditions
PS Timer Operation
Operation Heating Cooling
Indoor
Outdoor
Automatic
Reset
Cause
Indoor Senistor Error ƾƵƵ * * 1. Connector loose contact or ambient
temperature sensor error.
Indoor Heat Exchange
Senistor Error
ƾƶƶ * * 1. Connector loose contact or coil sensor
error.
Outdoor Senistor Error ƶƾƵ * * 1. Connector loose contact or sensor 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.EEPROM Error ƾƶƾ
* 1. Whether control panel is damaged.
Indoor Fan Error Ƶƶƾ *
Note ƶOnƾBlinkƵOff * This
function is
available.
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.
Domestic Air Conditioner Model: H2SM-14HC03/R2
H2SM-18HC03/R2
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