Page 1
Indoor Unit Operation & Installation
Manual
No. 0150506681
A
DUCT TYPE AIR CONDITIONER
HDU-09HF03
HDU-12CF03
HDU-18CF03
HDU-18HF03
HDU-28CF03
HDU-28HF03
Please read this operation manual before using the air conditioner.
Please keep this manual carefully and safely.
Page 2
1
TABLE OF CONTENTS
Cautions
Safety Precautions
Parts and Functions
Operation
Troubleshooting
Care and Maintenance
For Preparation of Heating ("Hot Keep")
Is The Unit Installed Correctly
Precaution for Installation
Installation of the Wire Controller
Installation Procedure
2
3-5
6-8
9-14
15-17
18
19
20
21
22
23-31
Page 3
Cautions
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 conditoiner.
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.
Do not obstruct or cover the ventilation
grille of the air conditioner. 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.
2
Disposal of the old 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
specialized waste disposal. The valuable
materials contained in a 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
damaged prior 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 packaging of your new
air conditioner
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.
Consult your local authorities for the name
and address of the waste materials collecting
centers and waste paper disposal services
nearest to your house.
Safety Instructions and Warnings
important observations relating to the
assembly, operation and maintenance of the
air conditioner.
Installation shall be done by professional
people, don't install unit by yourself.
All these valuable materials may be taken to
a waste collecting center and used again
after adequate recycling.
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.
For the purpose of safety, the air conditioner
must be properly grounded in accordance
with specifications.
Always remember to unplug the air
conditioner before opening inlet grill. Never
unplug your air conditioner by pulling on the
power cord. Always grip plug firmly and pull
straight out from the outlet.
The manufacturer does not accept
responsibility for any damages that may arise
due to non-observation of the following
instruction.
Before starting the air conditioner, read the
information given in the User's Guide
carefully. The User's Guide contains very
Page 4
Safety Precautions
Before starting to use the system, read carefully this"SAFETY PRECAUTIONS" to ensure a proper operation
of the system.
Safety precautions described here are classified to "
WARNING" and " CAUTION". Precautions which
are shown in the column of "
WANING" means that an improper handing could lead to a grave result like a
death, serious injury, etc. However, even if precautions are shown in the column of "
CAUTION", a very
serious problem could occur depending on situation. Make sure to observe these safety precautions faithfully
because they are very important information to ensure the safety.
Symbols which appear frequently in the text have following meanings.
Strictly prohibited.
Observe instructions faithfully.
Provide a positive grounding.
When you have read through the manual, keep it always at hand for read consultation. If the operator is replaced,
make sure to hand over this manual to the new operator.
ON
OFF
WARNING
CAUTIONS FOR INSTALLATION
The system should be applied to
places as office, restaurant,
residence and the like.
The system should be installed
by your dealer or a professional
installer.
Application to inferior environment
such as an engineering shop, could
cause equipment malfunction and
serious injury or death.
Installation by yourself is not
encouraged because it could cause
such problems as water leakage,
electrical shock or fire accident by
some improper handing.
Installation by yourself is not encouraged because
it could cause such problems as water leakage,
electrical shock or fire accident by some improper
handing.
Do not install nearby the place where
may have leakage of flammable gas.
Depending on the place of
installation, a circuit breaker
may be necessary.
If the gas leakes and gathers around,it
may cause the fire.
Unless the circuit breaker is
installed, it could cause elecrical
shocks.
Where strong winds may prevail, the
system should be fixed securely to
prevent a collapse.
Install on the place where can
endure the weight of air
conditioner.
Make sure the system is grounded.
Bodily injury could result by a collapse.
Bodily injury could result by a careless
installation.
Grounding cable should never be connected
to a gas pipe, city water pipe, lightning
conductor rod or grounding cable of
telephone. If the grounding cable is not set
properly, it could cause electric shocks.
CAUTIONS FOR TRANSFER OR REPAIR
Modification of the system is strictly prohibited. When
the system needs a repair, consult your dealer.
When the air conditioner is relocated, contact your
dealer or a professional installer.
Improper practice of repair could cause water leakage,
electric shock or fire.
Improper practice of installation could cause water leakage,
electric shock or fire.
CAUTION
Drain pipe should be arranged to provide
a positive draining.
If the pipe is arranged improperly,
furniture or the likes may be damaged
by leaked water.
WARNING
3
When you need some optional devices such
as a humidifier, electric heater, etc., be sure
to use the products which are recommended
by us. These devices should be attached by
a professional installer.
Page 5
4
Safety Precautions
CAUTIONS FOR OPERATION
You should refrain from exposing
your body directly to cool wind for
a long time.
Do not poke the air inlet or outlet
with a bar, etc.
It could affect your physical condition or
cause some health problems.
Since the internal fan is operating with
a high speed, it could cause an injury.
If you continue the operation without
removing the cause, it could result in a
trouble, electric shock or fire.
WARNING
When any abnormal condition
(scorching smell or others) is found,
stop the operation immediately and turn
off the power switch. Then consult your
dealer.
The system should never be used
for any other purposes than intended
such as for preservation of food,
flora and fauna, precision deices or
work of art.
It could cause deterioration of food or
other problems.
Do not handle switches with a wet
hand.
It could cause electric shocks.
Combustion apparatus should not be
placed allowing a direct exposure to
wind of air conditioner.
Incomplete combustion could occur on
the apparatus.
CAUTION
Do not wash the air conditioner with
water.
Do not operate the system while theair
outlet grill is removed.
Do not use the power switch to turn
on or off the system.
Do not use such equipment as a water
heater, etc. around the indoor unit or
the wire controller.
ON
OFF
It could cause electric shocks.
There is a risk of injury.
It could cause a fire or water leakage.
When operating the system
simultaneously with a combustion
apparatus, indoor air must be ventilated
frequently.
Do not place any objects on or climb
on the unit.
Do not try to repair or reconstruct by
yourself.
Do not install the system where the
air outlet reaches directly the flora and
fauna.
It will not be good for their health.
Make sure to use a fuse of proper
electric rating.
Use of steel or copper wire in place of a
fuse is strictly prohibited because it could
result in a trouble or fire accident.
It could cause a fire accident.
It is strictly prohibited to place a
container of combustible gas or liquid
near the air conditioner or to spray it
directly with the gas or liquid.
Do not touch the air outlet section
while the swing louver is operating.
There is a risk of injury.
If the system is operated at the vicinity
of such equipment which generates
steam, condensed water may drip during
cooling operation or it could cause a
fault current or short-circuit.
Insufficient ventilation could cause an
oxygen deficiency accident.
If the structure is not repaired immediately,
the unit could topple down to causea
personal injury.
When cleaning the system, stop the
operation and turn off the power
switch.
Cleaning should never be done while the
internal fans are running with high speed.
Do not put water containers on the
unit such as a flower vase, etc.
If the structure is not repaired immediately,
the unit could topple down to cause
apersonal injury.
Neither stand on the air conditioner
nor place something on it.
There are risks of falling or injury by
collapsed object.
Check occasionally the support
structure of the unit for any
damageafter a use of long period of
time.
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2. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent
or a similar qualified person.
3. If the fuse on PC board is broken please change it with the type of T 3.15A /250V.
4. The wiring method should be in line with the local wiring standard.
1. Applicable ambient temperature range:
The machine is adaptive in following situation
5. The power cable and connecting cable are self-provided.
The power cable should be H07RN-F 3G 2.0mm
2
( For HDU-12CF03),
H07RN-F 3G 2.5mm
2
( For HDU-09HF03, HDU-18CF03, HDU-18HF03),
H07RN-F 3G 4.0mm
2
( For HDU-28CF03, HDU-28HF03).
The connecting cable should be H05RN-F 0.75mm
2
x2+2.5mm2x3 ( For HDU-09HF03),
H05RN-F 0.75mm
2
x2+2.0mm2x3 (For HDU-18HF03),
H05RN-F 2.0mm
2
x3 ( For HDU-12CF03, HDU-18CF03),
and
H05RN-F : 0.75mm2x6 (For HDU-28HF03);
H05RN-F 0.75mm
2
x4 ( For HDU-28CF03).
During installation, when the connecting cables break off, it must be assured that the grouding
wire is the last one to be broken off.
6. The breaker of the air conditioner should be all-pole switch; and the distance between its two contacts
should be no less 3mm.
7. The indoor unit installation height is at least 2.5m.
Safety Precautions
5
Cooling
Heating
Indoor
outdoor
Rated Maximum Minimum
27 32 18
19 23 14
35 43 10
24 26 6
20 27 15
14.5 -- - 7 24 -7
6 18 --
DB C
WB C
DB C
WB C
Indoor
outdoor
DB C
WB C
DB C
WB C
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Parts and Functions
Wire controller
Indoor unit
Evaporator
Outlet
Electrical box
6
Drain pan
MODE FAN SWING
TEMP HEALTH
CLOCK SET
TIMER SLEEP
HEAT FILTER
RESET
ON/OFF
SET
ROOM
Page 8
7
Parts and Functions
Buttons of the wire controller
Buttons of the wire controller.
Cautions:
On cooling only unit, heating mode is not available;
For this unit the "HEALTH" function is not available.
For this unit the "SWING\FILTER" button is not
available.
Note:
The above information is the explanation of
the displayed information therefore varies
with those displayed in actual operation.
TEMP Setting Button
Used to select your desired temp.
Used for unit start and stop.
Power ON/OFF
Button
HEALTH
Button
Used for setting indoor health function.
Used to confirm Timer and Clock settings.
SET
Button
SLEEP
Button
Used to select sleep mode.
TIME Button
Used to set clock and timer setting.
HEAT Button
Used to start/stop auxiliary electric heater
when in heating operation.
CLOCK Button
Used to set correct time.
TIMER
Button
Used to select TIMER ON,TIMER OFF,
TIMER ON/OFF.
MODE Button
Used to select AUTO, COOL, DRY, HEAT
and FANoperation.
FAN SPEED Button
Used to select fan speed: LO, MID, HI, AUTO.
RESET Key
When in abnormal state,push the reset key
with a spike,which may return the unit to
normal.
Operation
1
2
4
5
6
3
8
7
9
10
11
4
5
6
1
2
3
9
11
12
8
12
7
10
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8
Display of the wire controller.
Clock set
When the unit is started for the first time, clock should be adjusted as follows:
Parts and Functions
SLEEP Display
Remote control display
MODE Display
Auto mode display
Dry mode display
Fan mode display
Cool mode display
Heat mode display
Electric heater mode display
TEMP Display
CLOCK Display
FAN SPEED Display
TIMER ON/OFF Display
HEALTH Display
Operating lamp
Press the CLOCK button, "AM"or "PM" flashes.
Display of the wire controller
Operation
4
2
3
1
5
6
8
7
4
5
6
1 2 3
9
8
7
9
Press " " or " " to set correct time.Each press the time will increase or decrease 1 min. If the
button is kept depressed, the time will increase or decrease quickly.
Press the SET button to confirm the time setting, "AM" or "PM" stop flashing, while clock
starts working.
Note: AM means morning and PM means afternoon.
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(4) Unit stop
Press ON/OFF button
, the unit stops.
Only time and room temp remains on LCD.
All indicators go out.
Vertical flap closed automatically.
9
Operation
Fan operation
Enjoy yourself by just a gentle press.
(1) Unit start
(2) Select operation mode
(3) Adjust fan speed
Press ON/OFF button, unit starts.
Previous operation status appears on display.
(except for TIMER and SLEEP setting)
Power indicator lights up.
Press MODE button. For each press, operation mode
changes as follows:
Press FAN button. For each press, the fan speed
changes as follows:
Unit will run at the selected fan speed.
The wire 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)
In FAN mode, it is not possible to select AUTO FAN or to set temperature.
Hints
AUTO COOL DRY FAN
The air conditioner has the function of POWER FAILURE RESUME.
HEAT
LOW
MID HIGH
Fan Operation
Unit will run in selected mode.
Stop display at "
" FAN.
For cooling only type not have HEAT "
" function.
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10
Operation
AUTO,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
(2) Select operation mode
(3) Temperature setting
Press ON/OFF button, unit starts.
Previous operation status appears on display
(except for TIMER and SLEEP setting). Power
indicator lights up.
Press MODE button. For each press, operation
modechanges as follows:
Recommendations
Hints
Wire controller can memorize each operation
status. When starting it next time, just press
ON/OFF button and unit will run in previous
status.
Press FAN button. For each press, fan speed
changes as follows:
(4) Adjust fan speed
Press ON/OFF button, the unit stops.
Only time and room temp remains on LCD.
All indicators go out.
Vertical flap closes automatically.
(5) Unit stop
Press TEMP button
AUTO COOL DRY FANHEAT
Unit will run in operation mode displayed on LCD.
Stop display at your desired mode.
AUTO,COOL,HEAT and DRY operation
Set the proper temperature.
Every time the button is pressed, the setting
temperature increases by 1
¡
; if the button is kept
pressed, the setting temperature will increase
quickly.
Every time the button is pressed, the setting
temperature decreases by 1
¡
; if the button is kept
pressed, the setting temperature will decrease
quickly.
AUTO
LOW
MID HIGH
AUTO
Unit will run at the selected fan speed.
When fan speed is AUTO, it is changed
automatically according to the indoor temperature.
In DRY mode, when the room temperature
becomes 2¡ higher than the setting
temperature, the unit will run intermittently at
LOW speed regardless of FAN setting.
In HEAT mode,warm air will blow out after a
short period of time due to cold-draft prevention
function.
For cooling only type not have HEAT " " function.
MODE FAN SWING
TEMP HEALTH
CLOCK SET
TIMER SLEEP
HEAT FILTER
RESET
ON/OFF
SET
Page 12
(1) Unit start
TIMER ONTIMER OFF TIMER ON-OFF
Press TIME " " or " " button.
11
TIMER operation
Hints
Set Clock correctly before starting Timer operation.
Operation mode will be displayed on LCD.
Power indicator lights up.
(2) TIMER mode selection
Press TIMER button to change TIMER mode.
Every time the button is pressed, display changes
as follows:
Then select TIMER mode as needed (TIMER ON
or TIMER OFF).Now "
"or " " will flash.
(3) TIMER setting
(4) Confirming your setting
After setting correct time, press SET button to
confirm time.
TIMER ON/OFF
To cancel TIMER mode
Just press TIMER button several times until
TIMER mode disappears.
Wire 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.
After unit start, select your desired operation mode.
Operation
Timer ON/OFF Function
blank
Every time the button is pressed, the time increases
by 10 minutes.
If the button is kept pressed, the time will changes
quickly.
Every time the button is pressed, the time decreases
by 10 minutes.
It can be adjusted within 24 hours at will.
Now " "or " " stops flashing.
Time displayed: Unit starts or stops at x hour x min
(TIMER ON or TIMER OFF).
Timer mode indicator lights up.
You can let unit start or stop automatically at
following time: Before you wake up in the
morning, or get back from outside or after you fall
asleep at night.
Page 13
(1) Unit start
TIMER ONTIMER OFF TIMER ON-OFF
Press TIME buttons " " or " " button.
Press TIME "
" or " " button and follow the
same procedures in "
Time setting for TIMER ON
".
Just press TIMER button several times until
TIMER mode disappears.
12
(3) Time setting for TIMER ON
AM refers to morning and PM to afternoon.
After setting correct time, press TIMER button to
confirm.
Now "
" stops to flash, While "
" starts
flashing.
(4) Time confirming for TIMER ON
Operation
TIMER ON-OFF
Set Clock correctly before starting Timer operation.
Every time the button is pressed, the time increases
by 10 minutes.
If the button is kept pressed, the time will changes
quickly.
Every time the button is pressed, the time decreases
by 10 minutes.
It can be adjusted within 24 hours at will.
Operation mode will be displayed on LCD.
Power indicator lights up.
After unit start, select your desired operation mode.
(2) TIMER mode selection
Press TIMER button to change TIMER mode.
Every time the button is pressed, display changes
as follows:
Then select TIMER ON-OFF, "
" will flash.
blank
(5) Time setting for TIMER Off
After time setting , press SET button to confirm.
"
" stops to flash.
Time displayed: Unit stops at
X hour X min.
To cancel TIMER mode
According to the Time setting sequence of
TIMER ON or TIMER OFF, either Start-Stop
or Stop-Start can be achieved.
Timer ON-OFF Function
(6)Time confirming for TIMER OFF
Time displayed: Unit starts at X hour X min.
Page 14
13
Operation
At night, before going to bed you can press down
the SLEEP button on the controller and the air
conditioner will run by the comfortable sleeping
mode to make you sleep more comfortable.
In COOL, DRY mode
Comfortable Sleep
Press SLEEP button once to make the air
conditioner have the previous-set sleep time ( first
power-on is "1h"), the sleep symbol will appear.
Press time button "
" / " " , you can choose the
time in 1-8 hours. Each press of "
" / " " , the
time increases/reduces 1 hour and "xh" appears in
the humidity setting part, "OFF" appears in "TIMER
OFF" display part and timer-off time; press SLEEP
button again to cancel sleep function, the sleep
symbol disappears.
In AUTO mode, unit will run in SLEEP function according to the operation mode.
After setting SLEEP function, it is forbidden to calibrate clock.
If the set sleep-time does not reach 8 hours, the unit will stop operation automatically after set time
is complete.
Set "TIMER-OFF" function first, then set SLEEP, and the sleep-set is performance; set TIMER-ON
function first, the sleep function can only be set before TIMER-ON; if set theSLEEP function first,
the TIMER function can not be set.
Note:
Sleep Function
2. In HEAT mode
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14
Power Failure Resume Function
Operation
Power failure resume (please set and apply as necessary)
With setting of power failure resume, if sudden power failure occurs, the unit will resume original operation
when power is supplied again.
Mark
1
2
3
4
5
6
7
8
In this series changeover switch is set:
1.ON 2.OFF 3.OFF 4.OFF 5. OFF 6.OFF 7.ON 8.OFF
Change-over switch
Setting method:
with ON of wire controller (except TIMER and FAN),repeatedly press SLEEP button 10 times in 5
seconds, and after 4 Beep from the buzzer,the unit comes into power failure resume mode.
To cancel:
press SLEEP button 10 times in 5 seconds,the buzzer sounds Beep twice and power failure resume function
is canceled.
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/OFFto turn off the unit when
power resumes.
Page 16
15
Trouble display
Remarks
shows resumable fault
For
remote type,
flash times
Indoor ambient temp. sensor failure
Indoor pipe temp. sensor failure
Outdoor ambient temp. sensor failure
Outdoor
pipe
temp. sensor failure
Sensor broken down or short circuit for more
than 2m
in
continuously
Failure
C
ode
W
ired
C
ontroller
C
entral
C
ontrol
lor
1
2
3
4
E1
E2
E3
E4
Failure description
Reason
Over-current protection /
Power supply abnormal
CT check abnormal 3 times in 30m
in
High pressure abnormal
High pressure switch acts 3 times in 30m
in
Communication between wired
controller and indoor abnormal
Communication abnormal for more than 4m
in
continuously
Communication between indoor and
outdoor abnormal
Drainage system abnormal
Float switch broken down for more than 25m
in
continuously
Temperature protection malfunction
Low pressure abnormal
Low pressure switch acts in normal running
Solenoid valve act incorrectly 3 times
continuously
shows it is not resumable fault.
E5
E6
E8
E9
E0
E7
E6
01D
02D
11D
12D
10D
14D
05D
05D
21D
31D
26D
5
6
8
9
10
13
16
Troubleshooting
Page 17
please check the following things about your air conditioner before making a servie call.
Unit fails to start
ON
OFF
Is the power source
switch adjust cut in?
Is city supply power in
normal?
Power
stoppage?
Isn't the signal receiving
section exposed to the
direct sunlight or strong
illumination?
Isn't the earth leakage
breaker in action?
It is dangerous. Turn off
the power supply switch
immediately and contact
the sales dealer.
Power supply switch is
not ON.
Cooling or heating is not sufficient
Is the thermostat adjust
as required?
Isn't the air filter dirty?
Isn't any doors or windows
left open?
Doesn't any obstacle
exist at the air inlet or
outlet?
Cooling is not sufficient
Isn't sun-shine invading
direct?
Isn't any unexpected
heating load generated?
Isn't the room much
crowded?
Isn't the swing louver
horizontal?
(At HEATING mode)
If swing louver is horizontal,
the blow wind does not reach
floor.
The wind does not blow
during heating operation
Isn't it warming up?
page 10
When the air conditioner does not operate properly after you have checked the above mentioned items
or when the following phenomenon is observed, stop the operation of the air conditioner and contact
your sales dealer.
The fuse or breaker often shuts down.
Water drops off during cooling operation.
There is a irregularity in operation or abnormal sound is audible.
Note:
This unit has a function of automatic restart system after recovering power supply. Please contact the
sales dealer if it is not required.
16
Troubleshooting
Page 18
17
The followings are not malfunction
Shuru
Shuru
When the air conditioner is started, when the compressor starts or
stops during operation or when the air conditioner is stopped, it
sometimes sounds "shuru shuru" or "gobo gobo". It is the flowing
sound of the refrigerant, and it is not a trouble.
Water flowing
sound is heard.
This is caused by heat expansion or contraction of plastics.
Cracking sound is heard.
It smells.
Air which blows out from the indoor unit sometimes smells.
The smell results from residents of tobacco smoke or cosmetics
stuck inside of unit.
When the air conditioner is used at restaurant etc. where dense
edible oil fume is always exists, white fog sometimes blows out
of air outlet during operation.
In this case consult sales dealer for cleaning the heat exchanger.
During operation,
white fog comes
out of indoor unit.
Unit does
not start
Wait for
three
minutes
It is switched into the FAN mode
during cooling.
To prevent frost from being accumulated on the indoor unit heat
exchanger, it is sometimes automatically switched to the FAN mode
but it will soon return to the cooling mode.
Even if the operation switch is turned on, cooling, dehumidifying
or heating is not operable for three minutes after the conditioner is
stopped. Because the protecting circuit is activated.
(During this time air conditioner operates in fan
mode.)
The air conditioner can not be
restarted soon after it stops.
Air does not blow or the fan
speed can not be changed during
dehumidifying
During operation, operation mode
has changed over automatically.
Water or steam generates from
the outdoor unit during heating.
When it is excessively cooled during dehumidifying, the blower
automatically repeats reducing and lowering the fan speed.
Isn't the AUTO mode selected?
In the case of AUTO mode, operation mode is changed automatically from cooling to heating or vise-versa according to the room
temperature.
This results when frost accumulated on the outdoor unit is removed
(during defrosting operation).
Troubleshooting
Page 19
Care and Maintenance
Points to observe
Turn off the power supply switch. Do not touch with wet hand.
Do not use hot water or volatileliquid.
ON
OFF
Thinner
Do not
use!
Benzine
Tooth powder
Cleaning
1. Clean the air filter by lightly tapping it or with the cleaner. It is more
effective to clean the air filter with water.
If the air filter is very dirty, dissolve neutral detergent in the lukewarm
water (approx. 30
¡
), rinse the air filter in the water, and thoroughly
wash the air filter off the detergent in the plain water.
Do not dry the air filter with fire.
Do not run the air conditioner without the air filter.
Do not open the inlet grill until fan stops completely.
Fan will continue rotating for a while by the law of inertia after operation is being stopped.
Pre-Season Care
See that there are no obstacles blocking the air inlet and air outlet of both indoor and outdoor units.
Make sure that the air filter is not dirty.
Cut in the power supply switch 12 hours before starting run.
Post-Season Care
Operate the unit with FAN mode on a fair day for about half a day to dry the inside of the unit well.
Stop operation and turn off the power supply switch. Electric power is consumed even the air conditioner is in stop.
Clean the air filter and set it in the place.
Care and Cleaning of the unit
Clean with soft and dry cloth.
If it is very dirty, dissolve neutral detergent in the lukewarm water and make the cloth wet with the water.
After wiping, clean off the detergent using clean water.
CAUTION
CAUTION
2. After drying the air filter, set it up on the air conditioner.
18
Page 20
"HOT KEEP"is operated in the following cases.
When heating is started:
In order to prevent blowing out of cool wind, the indoor unit fan stopped
according to the room temperature which heating operation is started. Wait
for approx. 2 to 3 minute, and the operation will be automatically changed
to the ordinary heating mode.
Defrosting operation (in the heating mode):
When it is liable to frost. the heating operation is stopped automatically
for 5 to 12 minutes once per approx. one hour, and defrosting is operated.
After defrosting is completed, operation mode is automatically changed
to ordinary heating operation.
When the room thermostat is actuated:
When room temperature increases and room temperature controller actu-
ates, the fan speed is automatically changed to stop under low temperature
condition of indoor heat exchanger. When room temperature decreases,
air conditioner automatically changes over to ordinary heating operation.
WARMING OPERATION
Heat pump type warming
Defrosting operation
Atmospheric temperature and warming capacity
Period of warm-up
With the heat pump type warming, the mechanism of heat pump that concentrate heat of outdoor
air with the help of refrigerant to warm the indoor space, is utilized.
When a room is warmed with a heat pump type air conditioner, frost accumulates on the heat ex-
changer of outdoor unit along with the drop of indoor temperature. Since the accumulated frost re-
duces the effect of warming, it is necessery to automatically switch the operation to the defrosting
mode. During the defrosting operation, heating operation is interrupted.
Warming capacity of heat pump type air conditioner decreases along with the
drop of outdoor temperature.
When the warming capacity is not sufficient, it is recommended to use another
heating implement.
Since the heat pump type air conditioner employs a method to circulate warm
winds to warm the entire space of a room, it takes time before the room tem-
perature rises.
It is recommendable to start the operation a little earlier in a very cold morning.
For Preparation of Heating("Hot Keep")
19
Page 21
Is The Unit Installed Correctly
For inspection and maintenance
When you change your address or the installation place
Electric work
Installation place
Avoid installing the air conditioner
near the place where possibility of
inflammable gas leakage exists.
Install the unit at well ventilated
place.
Install the air conditioner firmly on
the foundation that can fully support
the weight of the unit.
If not, it may cause vibration or noise.
If some obstacle exist, it may cause
capacity reduction or noise increase.
Explosion (Ignition) may occur.
Select the place so as not to annoy
neighbor with the hot air or noise.
Snow protection work is necessary
where outdoor unit is blocked up
by snow.
It is advisable not to install the air conditioner at the following special place.
It may cause malfunction, consult the
sales dealer when you have to install
the unit on such a place.
The place where corrosive gas generates
(Hot spring area etc.)
The place where salt breeze blows
(Seaside etc.)
The place where dense soot smoke exists
The place where humidity is extraordinarily high
The place where near the machine which
radiates the electromagnetic wave
The place where voltage variation is considerably large
For details consult your sales dealer.
The electric work must be burden on the authorized engineer with qualification for electric work and
grounding work, and the work must be conducted in accordance with electric equipment technical standard.
The power source for the unit is to be of exclusive use.
An earth leakage breaker should be installed.(This is necessary to prevent electric shock.)
The unit must be grounded.
Special technology is required for removal or reinstallation of air conditioner, consult the sales dealer.
Besides, construction expense is charged for removal or reinstallation.
The capacity of air conditioner will decrease by contamination of inside of unit when it is used for about
three years although depending upon the circumstances under which it is used, and so in addition to the
usual maintenance service, special inspection/maintenance service is necessary. It is recommended to
make a maintenance contract (charged) by consulting your sales dealer.
Confirm the following items for safe and comfortable use of air conditioner.
The installation work is to be burden on the sales dealer, and do not conduct it by yourself.
20
Page 22
Safety precautions
Please read these "Safety Precautions" first then accurately execute the installation work.
Though the precautionary points indicated herein are divided under two headings,
WARNING
and
CAUTION
, those points which are related to the strong possibility of an installation done in error resulting
in death or serious injury are listed in the
WARNING
section. However, there is also a possibility of serious
consequences in relationship to the points listed in the
CAUTION
section as well.
In either case, important safety related information is indicated, so by all means, properly observe all that is
mentioned.
After completing the installation, along with confirming that no abnormalities were seen from the operation
tests, please explain operating methods as well as maintenance methods to the user (customer) of this equipment,
based on the owner's manual.
Moreover, ask the customer to keep this sheet together with the owner's manual.
WARNING
This system should be applied to places as office, restaurant, residence and the like. Application to inferior
environment such as engineering shop could cause equipment malfunction.
Please entrust installation to either the company which sold you the equipment or to a professional contractor.
Defects from improper installations can be the cause of water leakage, electric shocks and fires.
Execute the installation accurately, based on following the installation manual. Again, improper installations
can result in water leakage, electric shocks and fires.
When a large air-conditioning system is installed to a small room, it is necessary to have a prior planned
countermeasure for the rare case of a refrigerant leakage, to prevent the exceeding of threshold concentration.
In regards to preparing this countermeasure, consult with the company from which you perchased the
equipment, and make the installation accordingly. In the rare event that a refrigerant leakage and exceeding
of threshold concentration does occur, there is the danger of a resultant oxygen deficiency accident.
For installation, confirm that the installation site can sufficiently support heavy weight. When strength is
insufficient, injury can result from a falling of the unit.
Execute the prescribed installation construction to prepare for earthquakes and the strong winds of typhoons
and hurricanes, etc. Improper installations can result in accidents due to a violent falling over of the unit.
For electrical work, please see that a licensed electrician executes the work while following the safety
standards related to electrical equipment, and local regulations as well as the installation instructions, and
that only exclusive use circuits are used.
Insufficient power source circuit capacity and defective installation execution can be the cause of electric
shocks and fires.
Accurately connect wiring using the proper cable, and insure that the external force of the cable is not
conducted to the terminal connection part, through properly securing it. Improper connection or securing
can result in heat generation or fire.
Take care that wiring does not rise upward, and accurately install the lid/service panel. Its improper installation
can also result in heat generation or fire.
When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than
the designated refrigerant (R22) within the refrigeration cycle.Rupture and injury caused by abnormal high
pressure can result from such mixing.
Always use accessory parts and authorized parts for installation construction. Using parts not authorized
by this company can result in water leakage, electric shock, fire and refrigerant leakage.
CAUTION
Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a
telephone ground wire. Improper placement of ground wires can result in electric shock.
The installation of an earth leakage breaker is necessary depending on the established location of the unit.
Not installing an earth leakage breaker may result in electric shock.
Do not install the unit where there is a concern about leakage of combustible gas.
The rare event of leaked gas collecting around the unit could result in an outbreak of fire.
For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally
insulate it to prevent condensation. Inadequate plumbing can result in water leakage and water damage to
interior items.
Precaution for Installation
21
Page 23
Installation of the Wire Controller
22
1. Take down wire controller from the holder
3. Indoor unit wiring
Connect terminals (A,B,C,D) on lower part of wire controller to terminals (A,B,C,D) on PCB of indoor
unit.
Note:
When make wiring, please keep a distance between wires and power supply cord. ( >10mm )
Note:1. Switch box and cord for wiring are not supplied.
2. Don't touch PCB with hand.
2. Install the controller holder
Note: Tread surface of the terminal well so that shielding may not contact other part.
Cord kind
Size
Shield wire (4 core)
0.33mm
2
Wire size
Use shielede wires for telecommunication between wire controller and indoor unit;
indoor unit and outdoor unit. Ground the shield on one side.
Otherwise misoperation because of noise may occur.
Signal wire is self-provided.
Shielded wire
ground
Wire controller
Bracket
Bracket
Screw holes
52¡ 0.2
10.45
5.3
According to the position of 2 screw holes on the
holder, drill 2 holes on the wall, and strike the wood
stopper to the holes respectively.
Then align the 2 screw holes of wired controller
holder to the wood stopper, fix the holder on the wall
with wood screw.
Note:Try a wall as flat as possible for installation.
Don't use excessive force to tighten screws, otherwise,
the holder will be damaged.
4.Place wire controller on the holder, and pay attention not to pressing any wires.
Page 24
23
1. Select suitable places the outlet air can be sent to the
entire room, and convenient to lay out the connection
pipe, connection wire and the drainage pipe to outdoor.
2. The ceiling structure must be strong enough to support
the unit weight.
3. The connecting pipe, drain pipe and connection wire
shall be able to go though the building wall to connect
between the indoor and outdoor units.
4. The connecting pipe between the indoor and outdoor units as well as the drain pipe shall be as short
as possible. (See Figure 1)
5. If its necessary to adjust the filling amount of the refrigerant, please refer to the installation manual
attached with the outdoor unit.
6. The connecting flange should be provided by the user himself.
7. The indoor unit has two water outlets one of which is obstructed at the factory (with a rubber cap).
Only the outlet not obstructed (liquid inlet and outlet side) will be generally used during installation.
If applicable, both the outlets should be used together.
The indoor unit shall be installed at locations where cold and hot air could evenly circulated.
The following locations should be avoided:
Places with rich saline matters (seaside regions).
Places with plenty of gas sulfides (mainly in warm spring areas where the copper tube and braze
weld is prone to corrosion).
Locations with much oil (including mechanical oil) and steam.
Locations using organic solvents.
Places where there are machines generating HF electromagnetic waves.
Positions adjacent to door or window in contact with high-humidity external air. (Easy to generate
dew).
Locations frequently using special aerosols.
Indoor unit
Important
An access port must be provided during installation of indoor unit for maintenance.
Fig 1
Please do not install the unit in places where flammable gases may be leaked. In case
that gas is leaked and accumulated around the unit, it may cause dangers of fire etc.
! Caution
Installation Procedure
Indoor Unit
Page 25
a
b
c
d
e
f
g
h
i
abc defghi
1002 483 136 1105 255 105 880 970 220
HDU-18CF03,HDU-18HF03
HDU-28CF03, HDU-28HF03
HDU-09HF03, HDU-12CF03 418 538 483 220 255 508 610 136 -
24
Fig 2
After selecting the unit installation location, proceed the following steps:
Installation dimension: (Unit: mm)
1. Drill a hole in the wall and insert the connecting pipe and wire through a PVC wall-through tube
purchased locally. The wall hole shall be with a outward down slope of at least 1/100.
(See Figure 2)
2. Before drilling check that there is no pipe or reinforcing bar just behind the drilling position.
Drilling shall avoid at positions with electric wire or pipe.
3. Mount the unit on a strong and horizontal building roof. If the base
is not firm, it will cause noise, vibration or leakage.
4. Support the unit firmly.
5. Change the form of the connection pipe, connection wire and drain
pipe so that they can go through the wall hole easily.
c
b
a
d
e
f
g
h
HDU-18CF03,HDU-18HF03
HDU-28CF03, HDU-28HF03
HDU-09HF03, HDU-12CF03
Installation Procedure
Indoor Unit
Page 26
1.0m (use white motor plug)
5.0m(use red motor plug)
25
Each of the air sending duct and air return duct shall be fixed on the prefabricated panel of the floor
by the iron bracket.
The recommended distance between the edge of the air return duct and the wall is over 150mm.
The gradient of the condensate water pipe shall keep over 1%.
The condensate water pipe shall be thermal insulated.
When installing the ceiling Concealed type indoor unit, the air return duct must be designed and
installed (as figure shown).
Air distributary
Air return duct
Air return blind
Suspending hook
Drain pipe
Transition duct
Air out duct
Note: When connecting the long ducts, use the middle static terminals, which color is red.
The sketch map of long duct
Tie-in of air
distributary
M8 wide expansion bolt
M8 suspender screw
M8 wide lock washer
M8 screw nut
Air conditioner
Note: When connecting the short ducts, use the low static terminals, which color is white.
The distance L from the air outlet of the duct to the air outlet of the sir conditioner shall
be no more than 1 m.
The distance L from the air outlet of the duct to the air outlet of the sir conditioner shall
be no more than 5 m.
Ceiling
Air supply
A
Building roof of installation
Return air
Return air box
Unit
There should be
no obstacles
within 1m
Unit
Return air
Return air box
Air outlet grille
Air supply
Installation Procedure
Indoor Unit
Page 27
26
Installation of indoor unit duct
1. Installation of air sending duct
This unit uses rounded duct, the diameter of the duct is 180mm.
The rounded duct needs to add a transition duct to connect with the air-sending duct of indoor unit,
then connect with respective separator. As Fig. 1 shown, all the fan speed of any of the separators
air outlet shall be adjusted approximately the same to meet the requirement for the room air conditioner.
2. Installation of air return duct
Use rivet to connect the air return duct on the air return inlet of the indoor unit, then connect the
other end with the air return blind. As Fig. 2 shown.
Indoor unit
Soft connection
or static box
Transition duct
Rounded duct
Unit: mm
3 Thermal insulation of duct
Air-sending duct and air return duct shall be thermally insulated. First stick the gluey nail on the
duct, then attach the heat preservation cotton with a layer of tinfoil paper and use the gluey nail cap
to fix. Finally use the tinfoil adhesive tape to seal the connected part. As Fig. 3 shown.
Fig. 1
Fig. 2
Fig. 3
Air distributary
Tie-in of air
distributary
Indoor unit
rivet
Air return duct
Air return blind
gluey
nail
gluey
nail cap
adhesive tape
tinfoil
heat preservation
cotton
Installation Procedure
Indoor Unit
Page 28
27
Installing the suspension screw:
Use M8 or M10 suspension screws (4,prepared in the field)(when the suspension screw
height exceeds 0.9m,M10 size is the only choice).These screws shall be installed as
follows with space adapting to air conditioner overall dimensions according to the original
building structures.
Wooden structure
A square wood shall be supported by the beams and then set the suspension screws.
New concrete slab
To set with embedded parts,foundation bolts etc.
Original concrete slad
Use hole hinge,hole plunger or hole bolt.
Steel reinforcement structure
Use steel angle or new support steel angle directly.
Hanging of the indoor unit
Fasten the nut on the suspension screw and then hang the suspension screw in the T slot of the
suspension part of the unit.
Aided with a level meter,adjust level of the unit within 5mm .
Hanging bolt
Suspension screw
Support steel angle
Guide plate embedded part
Knife embedded part
Foundation bolt
Pipe suspension foundation bolt
Iron reinforcement
Square
wood
Beam
Suspension screw
Installation Procedure
Indoor Unit
Page 29
28
During trial run, check that there is no leakage at the pipe connection part during water
draining even in winter.
Installation Procedure
Indoor Unit
In order to drain water normally, the drain pipe shall be processed as specified in the installation
manual and shall be thermal insulated to avoid dew generation. Improper hose connection may
cause indoor water leakage.
Requirements
The indoor drain pipe shall be thermal insulated.
The connection part between the drain pipe and the indoor unit shall be insulated so as to prevent
dew generation.
The drain pipe shall be slant downwards (greater than 1/100). The middle part shall not be of S type
elbow, otherwise abnormal sound will be produced.
The horizontal length of the drain pipe shall be less than 20 m. In case of long pipe, supports shall
be provided every 1.5 2m to prevent wavy form.
Central piping shall be laid out according to the following figure.
Take care not to apply external force onto the drain pipe connection part.
Pipe and insulation material
Rigid PVC pipe VP31.5mm (internal diameter)
Foamed PE with thickness above 7 mm
Pipe
Insulation
Hose
Drain pipe size: (3/4") PVC pipe
The hose is used for adjusting the off-center and angle of the rigid PVC pipe.
Directly stretch the hose to install without making any deformation.
The soft end of the hose must be fastened with a hose clamp.
Please apply the hose on horizontal part
Insulation treatment:
Wrap the hose and its clamp until to the
indoor unit without any clearance with
insulating material, as shown in the figure.
Drain confirmation
Wall
Outside
Slant
Drain pipe (supplied
by the user)
S type elbow
VP30
To the largest (app. 10cm)
Down slope above 1/100
1.5m~2m
Support
Insulation
(supplied by the user)
Down slope
above 1/100
! Caution
Hose Hose clamp
Subsidiary insulation
Insulation
Rigid PVC pipe
Page 30
29
Installation Procedure
Indoor Unit
In installation, if there is refrigerant gas leakage, please take ventilation measures immediately.
The refrigerant gas will generate poisonous gas upon contacting fire.
After installation, please verify that there is no refrigerant leakage. The leaked refrigerant gas
will produce poisonous gas when meeting fire source such as heater and furnace etc.
Allowable pipe length and drop
These parameters differ according to the outdoor unit. See the instruction manual attached with the
outdoor unit for details.
Pipe material and size
Requirement
Overfilling or underfilling of refrigerant will cause compressor fault. The amount of the
added refrigerant shall be as specified in the instructions.
Connection of refrigerant pipe
Conduct flared connection work to connect all refrigerant pipes.
The connection of indoor unit pipes must use double spanners.
The installing torque shall be as given in the following table.
Double-spanner
operation
! Caution
Supplementary refrigerant
The refrigerant supplementation shall be as specified in the installation instructions attached with
the outdoor unit R22
The adding procedure shall be aided with a measuring meter for a specified amount of supplemented
refrigerant.
Connecting pipe
O.D.(mm)
Ø6.35
Ø12.7
Installing torque
(N-m)
11.8 (1.2kgf-m)
49.0 (5.0 kgf-m)
Ø9.52
Ø15.88
24.5 (2.5kgf-m)
78.4 (8.0 kgf-m)
HDU-09HF03
HDU-28CF03
HDU-12CF03
HDU-18CF03, HDU-18HF03
Pipe material Phosphorus deoxidized copper seamless pipe (TP2) for air conditioner
Pipe size
(mm)
Gas side Ø9.52
Liquid side Ø6.35
HDU-28HF03
Gas side Ø15.88
Liquid side Ø9.52
Gas side Ø12.7
Liquid side Ø6.35
Page 31
30
Conduct insulation treatment on both the gas side and liquid side of pipes respectively.
During cooling operation,both the liquid and gas sides are cold and thus shall be insulated
so as to avoid dew generation.
The insulating material at gas side shall be resistant to a temperature above 120
.
The indoor unit pipe connection part shall be insulated.
Installation Procedure
Indoor Unit
Vacuum pumping
Open all valves
Gas leakage detection
Insulation treatment
With a vacuum pump,create vacuum from the stop valve of the outdoor unit.
Emptying with refrigerant sealed in the outdoor unit is absolutely forbidden.
Open all the valves on the outdoor unit.
Check with a leakage detector or soap water that if there is gas leakage at the pipe
connections and bonnets.
The notch upward(Attached detail view)
Indoor unit
Subsidiary insulation tube
Field piping side
Page 32
Electric wiring
WARNING
DANGER OF BODILY INJURY OR DEATH
TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER SOURCE BEFORE
MAKING ANY ELECTRIC CONNECTIONS. GROUND CONNECTIONS MUST BE
COMPLETED BEFORE MAKING LINE VOLTAGE CONNECTIONS.
(1) Selection of size of power supply and interconnecting wires.
Precautions for Electric wiring
Electric wiring work should be conducted only by authorized personnel.
Do not connect more than three wires to the terminal block. Always use round type crimped terminal
lugs with insulated grip on the ends of the wires.
Use copper conductor only.
Select wire sizes and circuit protection from table below. (This table shows 20 m length wires with less
than 2% voltage drop.)
(2) Wiring connection
Item
Phase
Switch breaker
(A)
Circuit breaker
Overcurrent protector
rated capacity (A)
Power source
wire size
(minimum)
Switch
breaker
Earth leakage breaker
Leak
current
30mA
1
30 20 2.5mm
2
30
HDU-18HF03
30mA1 40 36 4.0mm
2
40
HDU-28HF03
HDU-18CF03
HDU-28CF03
30mA1 20 8 2.5mm
2
30HDU-09HF03
30mA1 20 10 2.0mm
2
30
HDU-12CF03
L N
Y/G
POWER SUPPLY:
1PH,220-230V~,50Hz
HDU-28HF03
1 2 3 4 5
Y/G
L N 3 4 5
Y/G
OUTDOOR UNIT
TERMINAL BLOCK
INDOOR UNIT
TERMINAL BLOCK
31
HDU-18HF03
INDOOR UNIT TERMINAL BLOCK
1(L) 2(N) 3 4
Y/G
1 2 3 4 5 N L
POWER SUPPLY:
1PH,220-230V~,50Hz
OUTDOOR UNIT TERMINAL BLOCK
OUTDOOR UNIT
TERMINAL BLOCK
INDOOR UNIT
TERMINAL BLOCK
1
234
5
1
2
3
4
Y/G
POWER SUPPLY:
1PH,220-230V~,50Hz
HDU-09HF03
L N
Y/G
POWER SUPPLY:
1PH,220-230V~,50Hz
HDU-28CF03
Y/G
OUTDOOR
UNIT
TERMINAL
BLOCK
1 2 3
L N 3 4 5
Y/G
INDOOR UNIT
TERMINAL BLOCK
HDU-18CF03
INDOOR UNIT TERMINAL BLOCK
1(L) 2(N) 3 4
Y/G
1 2 3 4 5 N L
POWER SUPPLY:
1PH,220-230V~,50Hz
OUTDOOR UNIT TERMINAL BLOCK
POWER SUPPLY:
1PH,220-230V~,50Hz
OUTDOOR UNIT
TERMINAL BLOCK
INDOOR UNIT
TERMINAL BLOCK
1
234
1
2
3
4
5
Y/G
HDU-12CF03
Installation Procedure
Electric Wiring
Page 33
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