Haier H2SM-14HC03/R2 User manual

H2SM-14HC03/R2
H2SM-18HC03/R2
No.0010555643
SPLITTYPE ROOM AIR CONDITIONER
OPERATION MANUAL
Please read this operation manual before using the air conditioner.

Before disposing an old air conditioner that
goes out of use, please make sure it's
inoperative and safe. Unplug the air conditioner
in order to avoid the risk of child entrapment.
It must be noticed that air conditioner system
contains refrigerants, which require speciali-
zed waste disposal.The valuable materials
contained in an air conditioner can be recycled.
Contact your local waste disposal center for
proper disposal of an old air conditioner and
contact your local authority or your dealer if
you have any question. Please ensure that
the pipework of your air conditioner does not
get damagedprior to being picked up by the
relevant waste disposal center, and contribute
to environmental awareness by insisting on an
appropriate, anti-pollution method of disposal.
Disposal of the old air conditioner All these valuable materials may be taken to
a waste collecting center and used again after
adequate recycling.
Consult your local authorities for the name
and address of the waste materials collecting
centers and waste paper disposal services
nearest to your house.
Disposal of the packaging of your
new air conditioner
Safety Instructions andWarnings
1
Cautions
All the packaging materials employed in the
package of your new air conditioner may be
disposed without any danger to the
environment.
The cardboard box may be broken or cut into
smaller pieces and given to a waste paper
disposal service.The wrapping bag made of
polyethylene and the polyethylene foam pads
contain no fluorochloric hydrocarbon.
Before starting the air conditioner, read the
information given in the User's Guide caref-
ully.The User's Guide contains very impor-
tant observations relating to the assembly,
operation and maintenance of the air
conditioner.
The manufacturer does not accept respon-
sibility for any damages that may arise due
to non-observation of the following
instruction.
Damaged air conditioners are not to be
put into operation.In case of doubt, consult
your supplier.
Use of the air conditioner is to be carried
out in strict compliance with the relative
instructions set forth in the User's Guide.
Installation shall be done by professional
people, don't install unit by yourself.

For the purpose of the safety,the air con-
ditioner must be properly grounded in acco-
rdance with specifications.
Always remember to unplug the air
conditioner before openning inlet grill.Never
unplug your air conditioner by pulling on
the power cord. Always grip plug firmly and
pull straight out from the outlet.
All electrical repairs must be carried out
by qualified electricians.Inadequate repairs
may result in a major source of danger for
the user of the air conditioner.
Do not damage any parts of the air
conditioner that carry refrigerant by piercing
or perforating the air conditioner's tubes
with sharp or pointed items, crushing or
twisting any tubes, or scraping the coatings
off the surfaces. If the refrigerant spurts
out and gets into eyes, it may result in
serious eye injuries.
Cautions
Do not obstruct or cover the ventilation
grille of the air conditoner.Do not put fingers
or any other things into the inlet/outlet and
swing louver.
Do not allow children to play with the air
conditioner.In no case should children be
allowed to sit on the outdoor unit.
The refrigerating circuit is leak-proof.
Remark per EMC Directive 89/336/EEC.
To prevent flicker impression during the
start of the compressor(Technical Process)
and the adversely influence caused by
the 2nd harmonies of compressor following
installation conditions do apply:
1.The power connection for air conditioner
has to be done at the main power
distribution.This distribution has to be of a
Iow impedance. Normally the required
impedance is reached at a 32A fusing point.
2.No other equipment has to be connected:
to this power line.
3.For the details installation acceptance
please refer to your contract with the power
supplier, if restrictions do apply for products:
like washing machines,air conditioners or
electrical ovens.
4.For the details of the power of air,
conditioner, please refer to the rating plate
of the product.
5.For any question contact your local dealer.
Specifications
2

Indoor Unit
Parts and Functions
3
Inlet grille
Air filter
Vertical flap
Use remote controller to
adjust up and down air flow.
(Don't adjust it manually.)
Power indicator
Lights up when unit starts.
Timer mode indicator
Lights up when Timer operation
is selected.
Operation mode indicator
Remote signal receiver
Emergency switch(manual)
Test running switch(manual)
Lights up during compressor
running.
A beeping sound is generated when
a signal from remote controller is
received.
Used when remote controller is lost or
defective. Unit will run temporarily.
Used only for test running in cooling
when room temp. is below 16oC.
Don't use it in normal operation.
Outdoor Unit
Actual inlet grille may vary from the one shown in the manual according to
the product purchased

Parts and Functions
Cooling Indoor Maximum:D.B/W.B 32oC/23oC
24oC/18oC
-7oC/-8oC
43oC/26oC
18oC
27oC
15oC
18oC/14oC
Maximum:D.B/W.B
Minimum:D.B
Maximum:D.B
Minimum:D.B
Minimum:D.B/W.B
Maximum:D.B/W.B
Minimum:D.B/W.B
Outdoor
Indoor
Outdoor
Heating
2. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent
or a similar qualified person. The type of connecting wire is H05RN-F or H07RN-F.
3. If the fuse on PC board is broken please change it with the type of T.3.15A/250V.
4. The distance between the indoor unit and the floor should be more than 2m.
5. The wiring method should be in line with the local wiring standard.
6. After installation, the power plug should be easily reached.
7. The waste battery should be disposed properly.
8. The appliance is not intended to use by young children or infirm persons without supervision
9.Young children should be supervised ensure that they do not play with the appliance.
10.The appliance must be installed on strong enough supporter.
11 .The wiring diagram is attached inside the machine.
The machine is adaptive in following situation
1. Applicable ambient temperature range:
4
13.For the unit H2SM-18HC03/R2
Through poor conditions of the electrical MAINS, shortly voltage drops can appear when
starting the EQUIPMENT.This can influence other equipment (eg. Blinking of a lamp).
If the MAINS-IMPEDANCE Zmax<0.199 OHM, such disturbances are not expected. (In case
of need, you may contact your local supply authority for further information.)
12. A breaker should be incorporated into fixed wiring. The breaker should be all-pole switch
and the distance between its two contacts should be not less than 3mm.

5
Hints
After replacing with new batteries, remote controller will conduct self-check, displaying
all information on LCD. Then, it will become normal.
Buttons and display of the remote controller.
Parts and Functions
1.Mode display
AUTO
COOL
DRY
HEAT
FAN
2. SWING display
3. FAN SPEED display
4. HEALTH display
5. SLEEP display
6. LOCK display
7. TIMER ON display
8. AUXILIARY HEAT display
9. HEALTH
10. MODE
Used to select AUTO,COOL
and FAN
11. CLOCK
Used to set correct time
12. TIMER
Used to select TIMER ON,TIMER OFF
13. RESET
Used to reset the controller back to
normal condition.
14. CODE
Used to select code A or B with a press,A
or B will be displayed on LCD.please
select A without special explanation
15. CODE display
16. SIGNAL SENDING display
17. POWER/SOFT display
18. TEMP. display
19. CLOCK display
20. TIMER OFF display
21. TEMP
Used to select your desired temperature
22. FAN
Used to select fan speed
23. POWER ON/OFF
Used for unit start or stop
24. SLEEP
Used to select sleep mode
LOW MED HI AUTO
25. SWING
26. SET
Used to confirm timer and clock settings
27. HOUR
Used to set clock and timer settings
NOTE:(1)The following functions and related displays are not available: AUXILIARY HEAT display, POWER/SOFT display, LOCK display.
(2)If the Air conditioner don't have the function of the code ,press code B can cause it not available.
(3)Cooling only unit do not have functions and displays related with heating.
Clock set
When unit is started for the first time and after replacing batteries in remote controller, clock should
be adjusted as follows:
Press CLOCK button, "AM" or "PM" flashes.
Press or to set correct time. Each press will increase or decrease 1min. If the button is kept
depressed, time will change quickly.
After time setting is confirmed, press SET, "AM "and "PM" stop flashing, while clock starts working.

6
Hints
After replacing with new batteries, remote controller will conduct self-check, displaying
all information on LCD. Then, it will become normal.
Clock set
When unit is started for the first time and after replacing batteries in remote controller, clock should
be adjusted as follows:
Press CLOCK button, "AM" or "PM" flashes.
Press or to set correct time. Each press will increase or decrease 1min. If the button is kept
depressed, time will change quickly.
After time setting is confirmed, press SET, "AM "and "PM" stop flashing, while clock starts working.
NOTE:(1)The following functions and related displays are not available: AUXILIARY HEAT display, POWER/SOFT display,HEALTH display.
(2)If the Air conditioner don't have the function of the code ,press code B can cause it not available.
(3)Cooling only unit do not have functions and displays related with heating.
Buttons and display of the remote controller.
Parts and Functions
If the unit which you purchased has not health function, remote controller should
like the following figure: 1.Mode display
AUTO
COOL
DRY
HEAT
FAN
2. SWING display
3. FAN SPEED display
4. HEALTH display
5. SLEEP display
6. LOCK display
7. TIMER ON display
8. AUXILIARY HEAT display
9. SWING
10. MODE
Used to select AUTO,COOL
and FAN
11. CLOCK
Used to set correct time
12. TIMER
Used to select TIMER ON,TIMER OFF
13. RESET
Used to reset the controller back to
normal condition.
14. CODE
Used to select code A or B with a press,A
or B will be displayed on LCD.please
select A without special explanation
15. CODE display
16. SIGNAL SENDING display
17. POWER/SOFT display
18. TEMP. display
19. CLOCK display
20. TIMER OFF display
21. TEMP
Used to select your desired temperature
22. FAN
Used to select fan speed
23. POWER ON/OFF
Used for unit start or stop
24. SLEEP
Used to select sleep mode
LOW MED HI AUTO
25. SET
Used to confirm timer and clock settings
26. HOUR
Used to set clock and timer settings
27.LOCK
Used to lock buttons and LCD display.

7
Operation
When in use, put the signal transmission head directly to the
receiver hole on the indoor unit.
The distance between the signal transmission head and the
receiver hole should be within 7 m without any obstacle as well.
Don't throw the controller, prevent it from being damaged.
When electronic-started type fluorescent lamp or change-over
type fluorescent lamp or wireless telephone is installed in the
room, the receiver is apt to be disturbed in receivering the signals
so the distance to the indoor unit should be shorter.
Loading of the battery
Load the batteries as illustrated. 2 R-03 batteries,
resetting key (cylinder)
Remove the battery cover:
Slightly press " " and push down the cover.
Load the battery:
Be sure that the loading is in line with the" + "/"-"
pole request as illustrated.
Put on the cover again
Confirmation indicator:
In disorderation, reload the batteries or load the new batteries
after 6 mins.
Note:
Use two new same-typed batteries when loading.
If the remote controller can't run normally or doesn't work at all,
use a sharp pointed item to press the reset key.
Hint:
Remove the batteries in case unit won't be in usage for a long period.
If there are any display after taking-out just need to press reset key.
Power failure resume(please set and apply as necessary)
If sudden power failure occurs, the unit will resume original operation when power is
supplied again.
Note: When sudden power failure happens during unit operation in power failure resume mode, if
the air conditioner is not desired for use in a long period, please shut off the power supply
in case that the unit automatically resume operation when power is re-supplied, or press
ON/OFF to turn off the unit when power resumes.
Remote controller's operation

8
Operation
(4) Unit stop
(1) Unit start
mode changes as follows:
Press ON/OFF button, unit starts.
Previous operation status appears on display.
(Not Timer setting)
Power indicator on indoor unit lights up.
(2) Select operation mode
Press MODE button. For each press, operation
AUTO COOL DRY HEAT FAN
Unit will run in selected mode.
Stop display at " " AUTO or " "FAN.
(3) FAN
Press FAN button. For each press, fan speed changes
as follows:
Unit will run at selected fan speed.
Note:AUTO is not available in FAN mode.
Press ON/OFF button.
Only time remains on LCD.
All indicators on indoor unit go out.
Vertical flap closed automatically.
Hints
Remote controller can memorize settings in each operation mode. To run it next time just
select the operation mode and it will start with the previous setting.
No reselecting is needed.(TIMER ON/OFF needs reselecting)
Cautions: Note:
On cooling only unit, heating mode is not available, The above information is the
After replacing batteries, press ON/OFF, and display explanation of the displayed
becomes as follows: information therefore varies
Operation mode: AUTO, Temp. No with those displayed in actual
Timer mode: No, Fan speed :AUTO operation.
Auto run, Fan operation Enjoy yourself by just a gentle press.
LO MED HI AUTO

Operation
Press MODE button. For each press, operation
Recommendations:
9
COOL,HEAT and DRY operation
Use COOL in summer. Use HEAT in winter
Use DRY in spring, autumn and in damp climate.
(1) Unit start
mode changes as follows:
Press ON/OFF button, unit starts.
Previous operation status appears on display.(Not Timer setting)
Power indicator on indoor unit lights up.
(2) Select operation mode
AUTO COOL DRY HEAT FAN
Unit will run in operation mode displayed on LCD.
Stop display at your desired mode.
(3) Select temp. setting
Press TEMR button.
Every time the button is pressed, temp. setting increases 1oC
Every time the button is pressed, temp. setting decreases 1oC
Unit will start running to reach the temp. setting on LCD.
Press FAN button. For each press, fan speed changes
(4) Fan speed selection
as follows:
just press ON/OFF button and unit will run in previous status.
Unit runs at the speed displayed on LCD.
Hints
On cooling only unit, heating mode is not available.
Remote controller can memorize each operation status. When starting it next time,
COOL operation starts when room
temp. is higher than temp. setting. Ultra-low air flow
Temp. setting+2oC
Temp. setting
On reaching temp. setting, unit
will run in mild DRY mode.
LO MED HI AUTO
In HEAT mode,warm air will blow out after a short period
of time due to cold-draft prevention function.
In DRY mode, when room temp. becomes 2oC higher than
temp. setting, unit will run intermittently at LO speed
regardless of FAN setting.

10
(5) Air flow direction adjustment
After operation mode is selected, vertical flap will open automatically according to the mode.
Referring to the Fig.
COOL
HEAT
COOL HEAT
About 10oAbout 60o
About 10o
About 45o
About 60o
better set a temp. difference of 3-5 C between indoor and outdoor temp. in COOL mode.
Hints
As cold air flows downward in COOL mode, adjusting air flow horizontally will be much more
helpful for a better air circulation.
As warm air flows upward in HEAT mode, adjusting air flow downward will be much more
helpful for a better air circulation.
Be careful not to catch a cold when cold air blows downward.
It is harmful to your health in summer to go frequently in and out of places where temp.
difference is above 7oC. Temp. difference of 3-5oC will remove your fatigue.
More than this, unit's load can be reduced and power consumption cut down as well. So, you'd
(6) Unit stop
Press ON/OFF button.
Only time remains on LCD.
All indicators on indoor unit go out.
Vertical flap closes automatically.
Cautions:
Unit won't restart until 3 minutes have
elapsed, due to system protection.
HEAT mode is not available on
cooling only unit.
It is advisable not to keep vertical flap at
downward position for a long time in COOL
or DRY mode, otherwise, condensate
water might occur.
Cautions: Cautions:
When humidity is high, condensate water
might occur at air outlet if all horizontal
louvers are adjusted to left or right.
Move the horizontal blade by a knob on air
conditioner to adjust left and right direction
referring to Fig.
Left and right air flow adjustment
(manual)
Press SWING button, vertical flap will move within
the range shown in the Fig. Press SWING button
stop it at a fixed position.
Up and down (Use remote controller)
Operation

11
Operation
TIMER Operation
You can let unit start or stop automatically at following times: Before you wake up in the
morning, or get back from outside or after you fall asleep at night.
Set Clock correctly before starting Timer operation
TIMER ON/OFF
Power indicator on indoor unit lights up.
(1)After unit start, select your desired operation mode.
Operation mode will be displayed on LCD.
(2)TIMERmode selection
Press TIMER button to change TIMER mode.
Every time the button is pressed, display changes as follows:
ON OFF ON OFF
TIMER ON TIMER OFF TIMER ON-OFF
blank
Select your desired TIMER mode (TIMER ON or TIMER
OFF) ON or OFF will flash.
(3)Timer setting
Press HOUR / button.
Every time the button is pressed, time increases 10 min.
If button is kept depressed, time will change quickly.
Every time the button is pressed, time decreases 10 min.
If button is kept depressed, time will change quickly. Time
will be shown on LCD. It can be adjusted within 24 hours.
Timer mode indicator on indoor unit lights up.
(4)Confirming your setting
After setting correct time, press SET button to confirm, "ON"
or "OFF" stops flashing
Time displayed: Unit starts or stops at x hour x min. (TIMER
ON or TIMER OFF).
To cancel TIMER mode
Just press TIMER button several times until TIMER mode disappears.
Hints
After replacing batteries or a power failure happens, Time setting should be reset.
Remote controller possesses memory function, when use TIMER mode next time, just
press SET button after mode selecting if timer setting is the same as previous one.

12
TIMER ON-OFF
TIMER ON-OFF
To cancel TIMER mode
Power indicator on indoor unit lights up.
(1)After unit start, select your desired operation mode.
Operation mode will be displayed on LCD.
ON OFF ON OFF
TIMER ONTIMER OFFTIMER ON-OFFblank
Every time the button is pressed, display changes as follows:
(2) Press TIMER button to change TIMER mode.
Select TIMER ON-OFF. "ON" will flash.
(3)Time setting for TIMER ON
If button is kept depressed, time will change quickly.
Every time the button is pressed, time decreases 10 min.
If button is kept depressed, time will change quickly.
Every time the button is pressed, time increases 10 min.
It can be adjusted within 24 hours.
Time will be shown on LCD.
AM refers to morning and PM to afternoon
Press HOUR button.
(4) Time confirming for TIMER ON
After time setting, press TIMER button to confirm.
"ON" stops blinking, While "OFF" starts blinking.
Time displayed: Unit starts at x hour x min.
(5)Time setting for TIMER OFF
Follow the same procedures in "Time setting for TIMER ON".
(6) Time confirming for TIMER OFF
After time setting, press SET button to confirm, "OFF" stops flashing
Time displayed: Unit stops at X hour X min.
Just press TIMER button several times until TIMER mode disappears.
Operation

13
Operation
HEALTH Mode operation
(1) Press the ON/OFF switch.
(2) Press the "HEALTH" once," "
is displayed, now the air conditioner
is operating the health function.
(3) Press the "HEALTH"again,then
the health function stops.
The anion generator in the air conditioner can generate a lot of anion to
effectively balance the quantity of position and anion in the air and also to kill
bacteria and speed up the dust sediment in the room and finally clean the air
in the room.
BRIEF INTRODUCTION TO HEALTH OPERATION

Pi
Pi...Pi
14
Emergency andTest Operation
Use this operation only when the remote controller is defective or lost.
When the emergency operation switch is pressed,the" Pi "sound is heard once, which
means the start of this operation.
In this operation, it is possible to change the
settings of temperature and air flow speed, it is
also impossible to do an operation by the timer.
Operation
Emergency operation:
Follow the requirements below.
Room
temperature Designated
temperature Timer
mode Air flow
speed Operation mode
More than 23oC
Less than 23oC 23oC
26oCCONTINUOUS
CONTINUOUS
AUTO
AUTO
COOL
HEAT
If an air conditioner is a model for both cooling and heating.
Cooling when the room temperature at the start of operation is above 23oC.
temperature is less 16oC, do not use it in the normal
Use this switch in the test operation when the room
operation.
operation starts with the air flow speed setting "Hi".
Continue to press the test operation switch for more
than 5 seconds. After you hear the "Pi" sound twice,
release your finger from the switch, the cooling
Removal of the restriction of emergency or test operation:
Press once more the emergency operation switch, or manipulate through the remote
controller, a "Pi" sound causes the restriction of emergency or test operation to be
removed.
When the remote controller is manipulated for the removal, then the selected operation
by the remote controller.
Heating when the room temperature at the start of operation is below 23oC
Test operation:

15
Comfortable SLEEP
Operation
In COOL mode
sleep in selected mode.
Before going to bed at night, you can simply press
the SLEEP button and unit will bring you a sound
One hour after SLEEP mode starts, temp. will
become 1oC higher than temp. setting. After
running for another 1 hour, temp. rises by 1oC
further. Unit will run for 6 hours then stops
automatically. Temp. is higher than temp.
setting so that room temp. won't be too Iow
for your sleep.(As shown in Fig.l)
In HEAT mode
(As shown in Fig .2)
One hour after SLEEP mode starts, temp. will
become 2oC lower than temp. setting. After
running for another 1 hour, temp. decreases
by 2oC further. Unit will run for 3 hours at this
temp. then increases another 1oC and stops
automatically 3 hours later. Temp. is lower
than temp. setting so that room temp. won't
be too high for your sleep.
Power Failure Resume Function
with the indicator lighting up.
If the unit is started for the first time, the
compressor will not start running unless 3
minutes have elapsed. When the power
resumes after power failure, the unit will run
automatically, the power indicator lights up, and
3 minutes later the compressor starts running
Note:
In AUTO mode, unit will run in SLEEP
function according to operation mode.
In FAN mode, comfortable sleep is not
available.
SLEEP operation starts SLEEP operation stops
Approx. 6 hrs
1 hr
1 hr
Rises 1oC
Rises 1oC
Temp. setting Unit stop
Temp. setting Unit stop
decreases 2oC
decreases 2oC
Approx. 3 hrs
1 hr
1 hr
Rises 1oC
3 hrs
SLEEP mode starts SLEEP mode stops
Fig.1
Fig.2

16
Maintenance
Different models have different appearance
Cleaning of unit casing
Cleaning of remote controller
Cleaning of air filter
Cut off power supply
before cleaning unit casing with soft cloth.
In case of heavy stain, clean it with neutral detergent.
squeeze water in the cloth, wipe off the detergent on unit
casing completely.
Don't use water to wash unit casing, please use dry cloth.
Don't use glass cleaner or cloth soaked with chemicals.
1.Open inlet grille by pulling it upward. Air Filter 2.Remove air filter
Push up the filter's center tab
slightly until it is caesura of
the stopper. Remove it by
pulling down.
3.Clean the filter
Use a vacuum
cleaner to remove
dust,or wash the
filter with water.
After washing,
dry the filter
completely in the shade.
5.Close the inlet grille.
4.Attach the filter
Attach filter behind the stopper so that
the "Front" indication is facing to the front. Make sure
that it is completely behind the stopper, otherwise
problems might occur.

Air Filter
Air Purifying Filter
4
6
1
2
3
5
17
Maintenance
Replacement of Purifying Filter
Open the Inlet Grille
Open the inlet grille by pushing each end
of the inlet grille upward.
Detach the standard air Filter
Slide the knob slightly upward to release the
filter,then withdraw it.
Detach the Air Purifying Filter
Replace old Air Purifying Filter with
new one into the frame.
Attach the Air Purifying Filter
Attaching each of the Air Purifying Filters to
the indoor unit as white side face to front.
For the units of 22,the purifying filter is put
into the standard filter.
Attach the standard air Filter
(make sure to be attached)
Operating without standard air filter may cause
trouble with the machine.
Close the inlet Grille
Close the Grille surely.
The air conditioner which you are using may be different from the upper illustration,
please refer to the upper installation methods.
NOTE:
Please replace the Air Purifying Filter in 3-6 months as standard.
Stuffed filter are not usable even washing.Please purchase new one at sales shop.

18
Maintenance
Better use of air conditioner
Proper room temperature. Cleaning of the air filter.
Effective use of the timer.
Closing of doors and windows
during operation
Never fail to observe the followings
Do not sprinkle water over
the unit. Do not block the inlet or outlet.
Do not pull power plug. Do not use for other purposes.
Such as food preservation
plant cultivation or animal
breeding.
Avoid time-wasteful
operation
Curtains or blinds
for windows
Proper
temperature
Once every
two weeks

19
Trouble shooting
Before asking for service, check the following first.
Normal
Performance
inspection
Noise is heard
Phenomenon Cause or check points
The system does not restart
immediately.
Smells are generated.
Mist or steam are blown out.
Multiple
check
Does not work at all.
Poor cooling
Application temp. range of air conditioner -7oC~43oC.
When unit is stopped, it won't restart
immediately until 3 minutes have elapsed
to protect the system.
When the electric plug is pulled out and
reinserted, the protection circuit will work
for 3 minutes to protect the air conditioner.
During unit operation or at stop, a swishing
or gurgling noise may be heard. At first 2-3
minutes after unit start, this noise is more
noticeable. (This noise is generated by
refrigerant flowing in the system.)
During unit operation, a cracking noise may
be heard. This noise is generated by the
casing expanding or shrinking because of
temperature changes
Should there be a big noise from air flow in
unit operation, air filter may be too dirty.
This is because the system circulates smells
from the interior air such as the smell of
furniture, cigarettes.
During COOL or DRY operation, indoor unit
may blow out mist. This is due to the sudden
cooling of indoor air.
Is power plug inserted?
Is there a power failure?
Is fuse blown out?
Is the air filter dirty? Normally it should be
cleaned every 15 days.
Are there any obstacles before inlet and outlet?
Is temperature set correctly?
Are there some doors or windows left open?
Is there any direct sunlight through the
curtain)
window during the cooling operation?(Use
Are there too much heat sources or too many
people in the room during cooling operation?