Daitsu HS-18UIEK User manual

Split Air Conditioner
Thank you for choosing Residential Air Conditioners, please read this
owner’s manual carefully before operation and retain it for future reference.
Owner’s Manual
Residential Air Conditioners
MODEL: HS-18UIEK
HOS-18UIEK
HS-24UIEK
HOS-24UIEK

CONTENTS
Operation and maintenance
■Safety Precautions ..............................................................1
■Operation Tips ....................................................................4
■Name of Parts ....................................................................6
■Operation of Remote Controller ..............................................7
■ .........................................................12
Emergency Operation
■Care and Cleaning
.............................................................13
■Troubleshooting .................................................................15
Installation service
■Notices for installation .........................................................18
■Installation Drawing ............................................................21
.....................................................22
■
Installation of Indoor Unit
■Installation of Outdoor Unit
..................................................25
■Check after installation and test operation ...............................26
■Installation and Maintenance of Healthy Filter ..........................27
■Conguration of connection pipe and additional volume of refrigerant .....28
This symbol stands for the items
should be followed.
This symbol stands for the items
should be forbidden.
The products in this manual may be different with the real one, according to different
models, some models have displayer and some models without displayer, the position
and shape of the displayer please refer to the real one.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety.
Children should be supervised to ensure that they do not play with the appliance.
Do not dispose this product as unsorted municipal waste.
Collection of such waste separately for special treatment
is necessary.

Safety Precautions
Please read the following notices before operation.
Warning
★ Make sure that the
power plug is inserted tightly.
★ Do not unplug the power
plug when the unit is operating.
★ Do not damage the power
cord or use unspecied power
cord.
Otherwise, it may cause electric
shock or re.
Otherwise, it may cause electric
shock or re.
Otherwise, it may cause electric
shock or re.
★ Do not share the socket
with other electric appliances or
extend the power cord by using
other sockets.
★ Do not operate the air
conditioner with wet hands.
★ Do not drag the power cord
to pull out the plug.
Otherwise, it may cause electric
shock or re.
Otherwise, it may cause electric
shock.
Otherwise, it may cause re due to
overheating of power cord.
★ Before cleaning the air
conditioner, please turn off the
air conditioner and unplug the
power plug.
★ When the voltage is too
low, the compressor will vibrate
ercely, which may damage the
cooling system.
★
If there’s abnormal phenome-
non (like smell of burning), plea-
se cut off the power immediately
and then contact with Hiyasu
authorized maintenance center.
If there’s abnormal phenomenon
(like smell of burning), please cut
off the power immediately and then
contact with Hiyas uauthorized
maintenance center.
If this abnormal status is kept
on, air conditioner may be
damaged or even cause
electric shock or re.
Otherwise, it may cause electric
shock or injury.
- 1-

Safety Precautions
★For safety,be sure to turn
off the circuit beaker before
performingany maintenance
or cleaning or when the
product isnotused for an
extended period of time.
★Always ensure effective
earthing.
★Select the most appropriate
temperature.
Keep room about
5 ºC cooler than
outside.
No earthing may cause electric
shock.
Accumulated dust may cause re
or electric shock.
It can save electric energy.
★Do not block the air inlet or
outlet.
★Do not keep windows and
doors open for a long time
during operation.
★Keep combustible materials
at least 1m away from the
units.
It will result in insufcient
performance.
It will result in insufcient perfor-
mance and cause malfunctions.
★Do not step on the top of
the outdoor unit or place heavy
things on it.
★Install the outdoor unit rmly
enough.
It may cause falling of the unit
andinjury to the person.
Incorrect repairs may cause electric
shock or re. Please contact the
local authorised service center.
It may cause damage or injury.
- 2-
It may cause re or explosion.
★Do not attempt to repair the
air conditioner by yourself.

Safety Precautions
★ To change the airow direction, adjust the vertical
and horizontal air ow direction by using the remote
controller.
Do not cut off or damage the power cords or
control cords. If they are damaged, please
contact the dealer or qualied service
personnel.
★
Vertical Louver Horizontal Louver
★ Do not insert your hands or objects into
the air inlet or outlet.
Do not expose animals orplants directly to
the air ow.
★
It may cause an accident. It may have a detrimental effect on them.
★ Do not expose yourself to cold air directly
fora long time.
★ Do not use the unit for any other purpose, such
as preserving food or drying clothes.
It’s not good for your health.
★ Do not place a burner near the air conditioner.
★ Do not splash water on the air conditioner.
It may cause electric shock or malfunction. It will cause CO toxicosis due to incomplete burning.
- 3-

Operation Tips
Cooling Operation
Principle:
Air conditioners absorb heat in the room and transmit it to the outdoor unit so that the room tempe-
rature is decreased. The cooling capacity will increase or decrease according to outdoor ambient
temperature.
Freeze Protection:
If the unit is operating in COOL mode and in low ambient temperature, frost may form on the heat
exchanger. When indoor heat exchanger temperature decreases below zero, compressor will stop
operation to protect the unit.
Heating Operation
Principle:
Air conditioners absorb heat from outdoors and transmit it to the indoor unit, increasing room tempe-
rature. The heating capacity will decrease at low ambient temperature.
*
Defrosting:
When outdoor temperature is low but humidity is high, frost may form on the outdoor unit during
extended operation, affecting heating efciency. The air conditioner may stop operation during auto
defrosting operation.
*
During auto defrosting, the fan motors of indoor unit and outdoor unit will stop.
*
During defrosting, the indoor indicator ashes and the outdoor unit may emit vapor.
This is not malfunction.
*
After defrosting is nished, the heating operation will recover automatically.
*
Anti-cold Air Function:
In HEAT mode, the indoor fan will not operate in order to prevent cold air blowing out (within 2 minutes) if
indoor heat exchanger doesn’t reach a certain temperature under the following three states:
1. Heating operation starts; 2. After Auto Defrosting is nished; 3. Heating at low temperature.
Rest Heat Blow
In the following situations, the indoor unit may still run for some time, to blow out the rest
heat of the indoor unit.
1. In HEAT mode, the temperature reaches the setting value, the compressor stops and the indoor fan
still run for 60s.
2. In HEAT mode, if you turn off the unit, the compressor stops and the indoor fan still run for 10s.
- 4 -

Operation Tips
Operating Temperature Range
Outdoor side DB/WB (ºC)
32/23 43/26
Maximum cooling
Maximum heating 27/-- 24/18
The operating temperature range (outdoor temperature) for cooling unit is 18 ºC ~ 43 ºC for cooling
and heating unit is -7 ºC ~ 43 ºC.
Tips for energy saving:
* Do not overcool or overheat.
Setting temperature at a moderate level helps energy saving.
* Cover windows with a blind or a curtain.
Blocking sunlight and air from outdoors is favorable for cooling (heating).
* Clean air lters once per two weeks.
Clogged air lters lead to inefcient operation and energy waste.
Tip for relative humidity:
Condensate is likely to form at the air outlet if cooling or drying for a long time when the
relative humidity is more than 80% ( with doors and windows open).
- 5 -
Indoor side DB/WB (ºC)

Name of Parts
Indoor unit
Air in
(2)
(6)
(5)
Air out
(3) (4)
The icons displayed:
(1)
Cool
Dry
Heat
Power
Set temp. (2) Front panel
Outdoor unit
Air in
(7)
(8)
Air out
- 6 -
(1) Remote control
(3) Filter
(4) Guide louver
(5) Wall pipe
(6) Bind tape
(7) Connection wire
(8) Drainage pipe

Operation of wireless remote control
Name and function of wireless remote control
Note: Besure that there are no obstructions between receiver and remote controller;
Don’t drop or throw the remote control; Don’t let any liquid in the remote control and
put the remote control directly under the sunlight or any place where is very hot.
SLEEP
Signal transmitter SLEEP button
●Press this button, Sleep On and Sleep
Off can be selected. After powered on,
Sleep Off is defaulted. After the unit is
turned off, the Sleep function is canceled.
After Sleep function set up, the signal of
Sleep will display. In this mode, the time of
timer can be adjusted. Under Fan and Auto
modes, this function is not available.
FAN
FAN button
● Press this button, Auto, Low, Middle,
High speed can be circularly selected.
After powered on, Auto fan speed is
default. Under DRY mode, Low fan speed
only can be set up.
Remote control
Middle fan
Low fan
High fan
CLOCK
ON/OFF CLOCK button
ON/OFF button
● Press this button, the clock can be set
up, signal blink and display. Within 5
seconds, the value can be adjusted by
pressing + or - button, if continuously
press this button for 2 seconds above, in
every 0.5 seconds, the value on ten place of
Minute will be increased 1. During blinking,
repress the Clock button, signal will
be constantly displayed and it denotes the
setting succeeded. After powered on, 12:00
is defaulted to display and signal will be
displayed. If there is signal be displayed
thet denotes the current time value is Clock
value, otherwise is Timer value.
● Press this button, the unit will be turned on,
press it once more, the unit will be turned off.
When turning on or turning off the unit, the
Timer, Sleep function will be canceled, but the
presetting time is still remained.
MODE
MODE button
●Press this button, Auto, Cool, Dry, Fan,
Heat mode can be selected circularly.
Auto mode is default while power on.
Under Auto mode, the temperature will not
be displayed; Under Heat mode, the initial
value is 28 ºC (82ºF); Under other modes,
the initial value is 25 ºC (77 ºF).
DRY
FAN
AUTO
COOL
HEAT
(Only for cooling and heating unit.
As for cooling only unit, it won’t have
any action when it receives the signal
of heating operation.)
7

Operation of wireless remote control
Names and functions of wireless remote control
Notice: This is a general use remote controller, it could be used for the air conditioners
with multifunction; For some function, which the model dosen’t have, if press the correspon-
ding button on the remote controller that the unit will keep the original running status.
+ + button
●For presetting temperature increasing.
Press this button,can set up the tempe-
rature, when unit is on. Continuously
press and hold this button for more than
2 seconds, the corresponding contents
will be changed rapidly, until unpress
the button then send the information, ºC
(ºF) is displaying all along. In Auto mode,
the temp-erature can not be set up, but
operate this button can send the signal.
Centigrade setting range :16-30; Fahren-
heit scale setting range 61-86.
Remote control
- - button
● Presetting temperature can be decrea-
sed. Press this button, the temperature
can be set up, continuously press this
button and hold for two seconds, the re-
lative contents can quickly change, until
unhold this button and send the order
that the ºC (ºF) signal will be displayed
all the time. The temperature adjustment
is unavailable under the Auto mode, but
the order can be sent by if pressing this
button.
X-FAN
X-FAN button
● PressingX-FAN button in COOL or DRY
mode,the icon is displayed and the
indoor fan will continue operation for 10
minute in order to dry the indoor unit even
though you have turned off the unit. After
energization, X-FAN OFF is defaulted. X-
FAN is not available in AUTO, FAN or HEAT
mode.
Note: X-FAN is the alternative expression
of BLOW for the purpose of understanding.
LIGHT LIGHT button
● Press this button at unit On or Off
status, Light On and Light Off can be
set up. After powered on, Light On is
defaulted.
TURBO button
● In Cool or Heat mode, press this button
can turn on or turn off the Turbo function.
After turned on the Turbo function, its signal
will be displayed. When switching the mode
or changing fan speed, this function will be
canceled automatically.
8
TURBO

Operation of wireless remote control
Names and functions of wireless remote control
Notice: This is a general use remote controller, it could be used for the air conditioners
with multifunction; For some function, which the model dosen’t have, if press the corresponding
button on the remote controller that the unit will keep the original running status.
TIMER ON
TIMER ON BUTTON
●Timer On setting: Signal “ON” will blink
and display, signal will conceal, the
numerical section will become the timer
on setting status. During 5 seconds blink,
by pressing + or - button to adjust the
time value of numerical section, every
press of that button, the value will be
increased or decreased 1 minute. Hold
pressing + or - button, 2 seconds later, it
quickly change, the way of change is:
During the initial 2.5 seconds, ten num-
bers change in the one place of minute,
then the one place is constant, ten num-
bers change in the tens place of minute
at 2.5 seconds speed and carry. During
5s blink, press the Timer On button, the
timer setting succeeds. The Timer On has
been set up, repress the timer On button,
the Timer On will be canceled. Before
setting the Timer, please adjust the Clock
to the current actual time.
Remote control
TIMER OFF
SWING UP AND DOWN BUTTON TIMER OFF BUTTON
● Press this button, to set up swing
angle, which circularly changes as below: ●Once press this key to enter into TIMER
OFF setup, in which case the TIMER OFF
icon will blink. The method of setting is
the same as for TIMER ON.
OFF
This is an universal use remote controller. If
remote controller sends the following three
kinds of status that the swing status of
main until will be:
When the guide louver start to swing up
and down, if turn off the Swing, the air
guide louver will stop at current position.
which indicates the guide louver swings
up and down between that all ve
positions.
9

Operation of wireless remote control
Guide for operation - general operation
1. After powered on, press ON/OFF button, the unit will start to run. (Note: When it is
powered on, the guide louver of main unit will close automatically.)
2. Press MODE button, select desired running mode.
3. Pressing +or - button, to set the desired temperature. (It is unnecessary to set the
temp. at AUTO mode.)
4. Pressing FAN button, set fan speed, can select AUTO FAN, LOW, MID and HIGH.
5. Pressing button, to select the swing.
Guide for operation - Optional operation
1. Press SLEEP button, to set sleep.
2. Press TIMER ON and TIMER OFF button, can set the scheduled timer on or timer off.
3. Press LIGHT button, to control the on and off of the displaying part of the unit.
(This function may be not available for some units).
4. Press TURBO button, can realize the ON and OFF of TURBO function.
Introduction for special function
★ About X-FAN function
This function indicates that moisture on evaporator of indoor unit will be blowed after the unit
is stopped to avoid mould.
1. Having set X-FAN function on: After turning off the unit by pressing ON/OFF button indoor fan will
continue running for about 10 min at low speed. In this period, press X-FAN button to stop indoor fan
directly.
2. Having set X-FAN function off: After turning off the unit by pressing ON/OFF button, the complete unit
will be off directly.
When AUTO RUN mode is selected, the setting temperature will not be displayed on the LCD, the unit
will be in accordance with the room temp. automatically to select the suitable running method and to
make ambient comfortable.
If start this function, the unit will run at super-high fan speed to cool or heat quickly so that the ambient
temp. approachs the preset temp. as soon as possible.
10
★ About AUTO RUN
★ About turbo function

Operation of wireless remote control
Press + and - buttons simultaneously to lock or unlock the keyboard. If the remote controller is locked, the
icon will be displayed on it, in which case, press any button, the mark will icker for three times. If the
keyboard is unlocked, the mark will disappear.
1. Press swing up and down button continuously more than 2s, the main unit will swing back and forth from up
to down, and then loosen the button, the unit will stop swinging and present position of guide louver will be kept
immediately.
2. Under swing up and down mode, when the status is switched from off to , if press this button again 2s
later, status will switch to off status directly; if press this button again within 2s, the change of swing status
will also depend on the circulation sequence stated above.
Under status of unit off, press MODE and - buttons simultaneously to switch ºC and ºF.
It indicates: after starting this function by remote controller and the unit has been under defrost status, If turn
off the unit by remote controller, the unit will not stop defrosting until it is nished; if change setting mode by
remote controller, the function, which is set last time, won’t be carried out until defrosting nished.
Operation of this function on or off: If remote controller is under off status, press mode button and X-FAN
button simultaneously in order to enter or cancel this new function. If the unit is under defrost mode, dual eight
position on remote controller will display H1. If switch to heat mode, the position will display H1, which ickers
for 5s, in which case, press +/- button, H1 will disappear and setting temp. be displayed.
After remote controller is powered on, the new defrost function will be defaulted to be closed.
Changing batteries and notices
The wireless remote control adopts two new AAA1.5V dry batteries.
Battery cover
1.Slide the cell cover downward to take out the worn cells, then change 2
new ones (note to the correct polarity).
2.Cover the cell cover.
★ NOTE:
● When changing the batteries, do not use the old or different bateries,
otherwise, it can cause the malfunction of the wireless remote control.
● If the wireless remote control will not be used for a long time, plea-
se take them out, and don’t let the leakage liquid damage the wireless
remote control.
● The operation should be in its receiving range.
● It should be placed at where is 1m away from the TV set or stereo
sound sets.
● If the wireless remote control can not operate normally, please take them out,
after 30s later and reinsert, if they cannot normally run, please change them.
Sketch map for
changing batteries
11
★ About lock
★ About swing up and down
★ About switch between Fahrenheit and Centigrade
★ About new function of defrosting

Emergency Operation
Emergency Operation
When the remote controller is lost or damaged,
please use the manual switch on the main unit.
In that case, the unit will operate in AUTO mode
and the temperature setting or fan speed can not
be changed.
The manual switch can be operated as below:
Manual switch
Turn on the unit: Press AUTO/STOP button to
enter AUTO mode.
●
The microprocessor will select the mode (COOL,
HEAT, FAN) automatically according to the room
temperature for reaching comfortable effect.
Turn off the unit: Press the AUTO/STOP button to
switch off the unit.
●
The operation mode is shown in the following table.
●
Mode Model Temperature setting Airow rate
AUTO COOLING 25 ºC (COOL,FAN) AUTO
This switch is to be applied when the remote controller is missing.
●
- 12 -
AUTO HEAT PUMP 20 ºC (HEAT) AUTO
AUTO HEAT PUMP 25 ºC (COOL,FAN) AUTO

Care and Cleaning
Caution
Disconnect the power supply before cleaning and maintenance.
●
Do not splash water on the units for cleaning, as electric shocks may occur.
●
Wipe the units with a dry soft cloth, or a cloth slightly moistened with water or cleaner (not with
volatile liquid such as thinner or gasoline).
●
Cleaning the Front Panel
Remove the front panel. Dip a piece of cloth into the water colder than 45 ºC and dry it. Then wipe the
dirty part of front panel.
Note: Do not immerse the front panel into water so as to protect microprocessor components and
circuit diagram on the front panel.
Cleaning the Air Filter (every 3 months)
Note: Do not touch the n of indoor unit during cleaning to avoid personal injury.
Lift up the front panel.
Pull the air lter downwards to take it off, as
shown in Fig.(a,b).
Use a vacuum cleaner to remove dust.
If the lters are dirty, wash them with warm water
and mild detergent.
Dry the lters in the shade.
Fig. (a)
Note: Never use water above 45 ºC to clean the air lter as it
may cause deformation or discoloration.
③Reinstall the air lter
Reinstall the lters along the direction of arrowhead.
Close the panel.
- 13 -
①Take down the air lter
Fig. (b)
②Clean the air lter

Care and Cleaning
Check before Use
1.- Be sure that nothing obstructs the air outlet and inlet.
2.- Check if the batteries of remote controller are replaced.
3.- Check if the installation stand of the outdoor unit is damaged.
If damaged, consult the technicians.
Maintenance after Use
1.- Switch off the power supply.
2.- Clean the lters and bodies of indoor and outdoor units.
3.- Clear obstructions from the outdoor unit.
4.- Repaint the rubiginous place on the outdoor unit to prevent it from spreading.
- 14 -

Troubleshooting
CAUTION
The air conditioner is not expected to be serviced by users. Incorrect repair may cause
electric shock or re, so please contact an authorized service center for professional
service. The following checks prior to contact may save your time and money.
Phenomenon Troubleshooting
The unit does not operate: The unit does not operate if it is turned on imme-
diately after being turned off. This is to protect the
unit. You are expected to wait for about 3 minutes.
Waiting
Odours are emitted: Some odours may be emitted from the indoor unit.
This is the result of room smells (such as furniture,
tobacco, ect.) which have been taken into the air
conditioner.
Consult authorized service center for cleaning if
the odours still exist.
“Water owing” noise: The swishing noise like water owing is the sound
of refrigerant owing inside the unit.
Mist is emitted in COOL mode: During cooling operation, a thin mist may be seen
emitted from the indoor unit due to high room tempe-
rature and humidity.
After a period of time, the mist will disappear with
the decrease of room temperature and humidity.
Cracking noise: This is the sound of friction caused by expansion
and/or contraction of panel or other parts due to the
change of temperature.
- 15 -
●
●
●
●
●
●

Troubleshooting
Phenomenon Troubleshooting
Is the power cut off?
The unit can not be started up :
Is the power plug loose? (If applicable)
Is the circuit protection device tripped off?
Is voltage higher or lower?
(Tested by professionals)
Breaking off Is the TIMER correctly used?
Is temperature setting appropriate?
Cooling/Heating effect is poor :
Is the inlet or outlet blocked?
Is the lter dirty?
●
Is the window or the door open?
●
Is low fan speed set?
●
Are there heat sources in the room?
●
Check if there is magnetic or electrical interference
near the unit that may affecting operation of the
controller. In this case, pull the plug out and reinsert
it.
●
Remote controller is not available :
Is the remote controller within its operating range
or obstructed? Check the condition of the batte-
ries and replace them if necessary.
●
Check if the remote controller is damaged.
●
The humidity is high.
●
Water leakage of indoor unit :
Condensate overows.
●
Drain hose is loose.
●
During cooling operation, condensate is generated
around the pipes and connection joints.
●
Water leakage of outdoor unit :
●
During heating operation, the water on the heat
exchanger drips out.
Noise from indoor unit : The noise emitted when the fan or compressor
relay is switching on or off.
●
When the defrosting operation is started or sto-
pped, there is a sound of refrigerant owing in the
reverse direction.
●
- 16 -
●
●
●
●
●
●
●
During defrosting operation, the thaw water
ows out.
●

Troubleshooting
Phenomenon Troubleshooting
Indoor unit can not blow air: ●In HEAT mode, when the temperature of indoor
heat exchanger is very low, air ow is stopped in
order to prevent cold air. (Within 2 minutes).
In HEAT mode, when the outdoor temperature
is low or humidity is high, frost will be formed on
the outdoor heat exchanger. The unit will defrost
automatically and indoor unit will stop blowing air
for 3-12 minutes.
●
During defrosting operation, water or vapour may
be emitted.
●
In DRY mode, the indoor fan will stop blowing
air for 3-12 minutes in order to avoid condensate
being vaporised again.
●
If the unit operates at high humidity for a long
time, moisture will be generated on the air outlet
grill and then drip off.
Moisture on air outlet: ●
Defrosting or oil return mode It is normal.
The indicating lamp in heat mode will wink 0.5 s
and light 10s.
If any one of the following situations occurs, immediately stop all operations cut off the
power supply, and contact the authorized personnel.
●There is harsh sound during operation.
●Strong odours are emitted during operation.
●Water is leaking from the unit.
●The air switch or protection switch often trips.
●Water or other liquid is splashed into the unit.
●Power cord and power plug is overheating.
Stop operation and cut off the
power supply.
- 17 -

Notices for installation
Caution
1. The unit should be installed only by authorized service center according to local or government regula-
tions and in compliance with this manual.
2. Before installing, please contact with local authorized maintenance center. If the unit is not installed by
the authorized service center, the malfunction may not be solved due to incovenient contact between the
user and the service personnel.
3. When removing the unit to the other place, please rstly contact with the local authorized service center.
4. Warning: Before obtaining access to terminals, all supply circuits must be disconnected.
5. For appliances with type Y attachment, the instructions shall contain the substance of the following. If
the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly quali-
ed persons in order to avoid a hazard.
6. The appliance must be positioned so that the plug is accessible.
7. The temperature of refrigerant line will be high; please keep the interconnection cable away from the
copper tube.
8. The instructions shall state the substance of the following:
This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
Installation Site Instructions
Proper installation site is vital for correct and efcient operation of the unit. Avoid the following sites
where:
● Strong heat sources, vapours, ammable gas or volatile liquids are emitted.
● High-frequency electro-magnetic waves are generated by radio equipment, Welders and medical
equipment.
● Salt-laden air prevails (such as close to coastal areas).
● The air is contaminated with industrial vapours and oils.
● The air contains sulphures gas such as in hot spring zones.
● Corrosion or poor air quality exists.
- 18 -