Mitsubishi Heavy Industries STM25ZE, STM35ZE, STM25ZF-S, STM50ZE, STM35ZF-S User Manual
...
RJH012A011.EN
ENGLISH
USER’S MANUAL
AIR-CONDITIONER
Thank you for purchasing a MITSUBISHI HEAVY INDUSTRIES, LTD. Air-Conditioner. To
get the best long-lasting performance, read and follow this User’s Manual carefully before
using your air-conditioner. After reading, please store the Manual in a safe place and refer
to it for operational questions or in the event of any irregularities.
This air-conditioner is intended for domestic use.
An alternative refrigerant (R410A) is used in this air-conditioner. When asking the
dealer for service or inspection and maintenance, explain the dealer about this matter.
Contents
Safety precautions......................................................................................................................... 2
Choice of operations and features ................................................................................................ 4
Name of each part and its function ............................................................................................... 5
Operation and indication section for remote control .................................................................... 7
AUTO mode operation procedure ................................................................................................ 8
Temperature adjustment during AUTO ........................................................................................ 8
COOL/HEAT/DRY mode operation procedure ........................................................................... 9
ENGLISH
Concerning HIGH POWER operation ......................................................................................... 9
Concerning ECONOMY operation .............................................................................................. 9
Air flow direction adjustment procedure .................................................................................... 10
About FAN SPEED .................................................................................................................... 10
OFF-TIMER operation procedure .............................................................................................. 11
ON-TIMER operation procedure................................................................................................ 11
PROGRAM TIMER operation procedure .................................................................................. 12
About TIMER operation............................................................................................................. 12
Present time setting procedure .................................................................................................... 12
Emergency run operation............................................................................................................ 13
Remote control handling procedure ........................................................................................... 13
When the operation fails with the remote control ...................................................................... 14
Operating hints ........................................................................................................................... 14
Maintenance................................................................................................................................ 15
Has the unit been installed correctly? ......................................................................................... 16
About the Multiple Air-conditioner ............................................................................................ 16
Troubleshooting .......................................................................................................................... 17
Please remember! ....................................................................................................................... 17
When to contact your distributor without delay ......................................................................... 18
Air-conditioner operating conditions.......................................................................................... 19
Power Blackout Auto Restart Function ...................................................................................... 19
Characteristics of HEAT mode operation .................................................................................. 19
Self diagnosis function ............................................................................................................... 20
–1–
Safety precautions
• Before starting to use the system, please read these “Safety precautions” carefully to ensure proper operation of the system.
• The safety precautions are classified as “
improper handling could have dramatic consequences like death, serious injury, etc. Nevertheless, even precautions as shown in the column
“
CAUTION” might pose a serious problem, depending on the circumstances. Please observe these precautions with great care, since they are
essential to your safety.
• Symbols which appear frequently in the text have the following meaning:
DANGER” and “ CAUTION”. Precautions as shown in the column “ DANGER” indicate that
Strictly prohibited Provide positive earthing
• When you have read the instruction manual, please keep it near at hand for consultation. If someone else takes over as operator, make certain that the
manual is also passed on to the new operator.
Observe instructions with
great care
❚ INSTALLATION PRECAUTIONS
DANGER
The system is meant for domestic, residential etc. use.
If used in inferior environments, such as an engineering workplace, the equipment
may function poorly.
Do not install near places where inflammable gas may leak.
LPG
Gas leaks may cause fire.
Make sure that you drain the hose properly, so that all the
water has dripped out.
The system must be installed by your dealer or a qualified professional.
It is not advisable to install the system yourself, as faulty handling may cause leakage of water, electric shock or fire.
CAUTION
Depending on the place of installation, a circuit breaker may
be necessary.
If you don’t fit a circuit breaker, you may cause an electric shock.
Make sure that the system has been properly earthed.
Negligence may cause flooding in the room resulting in wet furniture.
❚ OPERATION PRECAUTIONS
Do not expose yourself to the cooling
air for prolonged periods.
This could affect your physical condition and cause
health problems.
Only use approved fuses.
Use of steel or copper wire instead of an approved
fuse is strictly forbidden, as it may cause a breakdown
or fire.
Earth cables should never be connected to a gas pipe, municipal water pipe, lightning conductor or telephone earth cable. Incorrect installation of the earth cable
may produce an electric shock.
DANGER
Do not insert anything into the air inlet.
This may cause injury, as the internal fan rotates at
high speed.
CAUTION
Do not handle the switches with wet
hands.
This may cause an electric shock.
– 2 –
Store the remote control out of reach
of infants.
Failure to observe this may result in the batteries
being swallowed or other accidents.
Don’t swing from the system.
If the system falls down,
you may get injured.
Safety precautions
CAUTION
Do not place a combustible insecticide
or paint spray near the blower, nor aim it
directly at the system.
This may result in a fire.
The system should only be used for its original purpose
and not for anything else like, for instance, preservation of
You should not expose any combustion appliance directly to the air
stream of the air-conditioner.
The appliance may then work inadequately.
Do not place anything containing water, like vases, on top of the unit.
food, plants or animals, precision devices or works of art.
The system is only intended for use in ordinary domestic rooms.
Any other use of the system may damage the quality of food, etc.
Do not sit on the outdoor unit nor put
anything on it.
Water entering the unit could damage the insulation and therefore cause an electric shock.
After a long period of use, check the unit's
support structure from time to time.
Do not wash the air-conditioner with water.
This could cause an electric shock.
Do not install the system at a place
where the air stream of the blower is
aimed directly at plants or animals.
This will damage their health.
Do not touch the aluminum fins on the
air heat exchanger.
If the unit falls down or things drop off it, people
could get hurt.
If you operate the system together with
a combustion appliance, you must regularly ventilate the indoor air.
Insufficient ventilation may cause accidents due to
oxygen deficiency.
If you don't repair any damage straightaway, the
unit may fall down and cause personal injury.
Stand firmly on a stepladder or other
stable object when removing the inlet
grill and filters.
Failure to observe this may result in injury through
insecure objects toppling over.
Do not place objects near the outdoor
unit or allow leaves to gather around the
unit.
If there are objects or leaves around the outdoor unit,
small animals may enter unit and contact electrical
parts resulting in break down, emission of smoke or
flame.
❚ PRECAUTIONS FOR TRANSFER OR REPAIRS
DANGER
Consult your dealer for repairs to the
system.
If the air-conditioner is moved elsewhere, contact your dealer or a professional fitter.
Failure to observe this may result in injury.
When you clean the system, stop the
unit and turn off the power switch.
Never clean the unit while the internal fan is rotating.
If you notice anything abnormal (smell of
burning, etc.), stop the system, turn off the
power switch and consult your dealer.
Wrong repairs could cause an electric shock, fire, etc.
Faulty installation may cause water leakage, electric shock, fire, etc.
– 3 –
Continued use of the system in abnormal circumstances may result in malfunctioning, electric shock,
fire, etc.
Choice of operations and features
Choice of operations
HEAT
The unit draws in heat from the outside air, transfers it inside and
heats the room.
DRY
Drying by extracting damp from the room.
Functioning of microcomputer depends on setting and room temperatures. It dehumidifies while keeping room temperature almost
constant.
Page 9
Page 9
COOL
Cooling by extracting heat from the room.
AUTO
Automatic selection of operating mode.
Page 9
Page 8
The Auto mode automatically selects the operation
mode (HEAT, COOL or
DRY), depending on the
room temperature when
switched on.
Features
Amenity facility
When using the timer to switch on, the system become operational shortly before the
set time, depending on the room temperature so that the desired temperature is
reached at the set time.
Adjustment of
airflow
Page 12
Page 10
• AIR SCROLL
This function sets the unit at the most suitable angle
for blowing, imitating a natural breeze.
• MEMORY FLAP
Once the flap position has been set, the unit will
memorise it and continue in the same position the
next time.
TIMER procedure
There are two timers, for ON and OFF.
They can be set as desired.
Page 11,12
HIGH POWER mode
Turning up the power operates the air-conditioner in the power cooling and heating
mode.
ECONOMY mode
This is an economic and healthy level of operation.
Page 9
Page 9
– 4 –
Name of each part and its function
INDOOR UNIT
STM25ZE/ZF-S
STM35ZE/ZF-S
STM50ZE/ZF-S
STM60ZE/ZF-S
Draws in the indoor air.
Removes dust or dirt from the inlet air.
Air blows out of here.
Air flow direction adjustment flap
Air inlet grill
Air filter
Page 15
Air outlet
Page 10
OUTDOOR UNIT
SCM40ZF-S
SCM45ZD/ZF-S
SCM48ZF-S
SCM60ZD/ZF-S
Unit indication & operation section
Remote control signal receiver
Drain hose
Drains water from the dehumidified air.
Refrigerant piping connection
electric flex
Wireless remote control
Page 7
SCM80ZD/ZF-S
Air inlet
(on side & rear surface)
Air outlet
– 5 –
Unit indication section
Remote control signal receiver
Illuminates during ECONOMY operation.
Unit ON/OFF button
Illuminates during HIGH POWER operation.
RUN (HOT KEEP) light (green)
• Illuminates during operation.
• Blinks at air flow stop due to the ‘HOT KEEP’.
Page 17
Illuminates during TIMER operation.
Unit ON/OFF button
In emergencies, this button can be used for turning on/off the unit when remote control is not available. Page 13
ECONO light (orange)
HI POWER light (green)
TIMER light (yellow)
Unit ON/OFF button
– 6 –
Operation and indication section for remote control
Operation section
FAN SPEED button
Each time the button is pushed, the indicator is switched over in turn.
HI POWER button
This button changes the HIGH POWER
mode.
Page 9
AIR FLOW button
This button changes the flap mode. When
pressed, this button changes the mode in the
following order:
(Air scroll) (Swing)
(Flap stopped)
Page 10
ON TIMER button
This button selects ON TIMER operation.
Page 11
TIME switch
This switch for setting the time.
Page 12
OFF TIMER button
This button selects OFF TIMER operation.
Page 11
• The above illustration shows all controls, but in practice
only the relevant parts are shown.
OPERATION MODE select button
Each time the button is pushed, the indicator is switched over in turn.
ON/OFF button
Press for starting operation, press again for
stopping.
ECONO button
This button changes the ECONOMY mode.
Page 9
TEMPERATURE button
This button sets the room temperature.
(This button changes the present time and
TIMER time.)
CANCEL button
This button cancels the ON timer and OFF
timer.
RESERVE button
This button sets the present time and
TIMER time.
RESET switch
Switch for resetting microcomputer.
Page 13
Indication section
HIGH POWER MODE indicator
Indicates during high power mode operation.
TEMPERATURE indicator
Indicates set temperature.
(Does not indicate temperature when operation
mode is on AUTO)
FAN SPEED indicator
Indicates set air flow rate with lamp.
AIR FLOW indicator
Shows selected flap mode.
ON TIMER indicator
Indicates during ON TIMER operation.
AUTO
MED
LO
HI POWER
HI
ECONO
AM PM
ON OFF
ECONOMY MODE indicator
Indicates during economy mode operation.
OPERATION MODE indicator
Indicates selected operation with lamp.
[
(Auto) • (Cool) • (Heat) • (Dry)]
TIME indicator
Indicates present time or timer setting time.
OFF TIMER indicator
Indicates during OFF TIMER operation.
Transmission procedure
When each button on the remote control is pressed – with the remote control pointing towards the air-conditioner unit – a signal is transmitted.
When the signal is received correctly, the unit will beep.
– 7 –
AUTO mode operation procedure
■ Automatically selects the operation mode (HEAT, DRY, COOL) depending on the room temperature when switched on.
Aim the remote control at the air-conditioner.
Press the ON/OFF button.
1
When the unit is not in AUTO mode:
Press MODE button.
Move the [ mark] to the (Auto) position.
To stop: Press the ON/OFF button.
AUTO mode can be
operated by simply
pressing the ON/OFF
button.
• If you don’t want the AUTO mode programme, change to
HEAT, DRY or COOL instead of AUTO.
Page 9
Air flow direction adjustment
procedure.
Page 10
2
NOTE
• Air is not blown out during the op-
eration.
Page 17
• Simultaneous automatic operation.
Page 16
Temperature adjustment during AUTO
Air temperature adjustment is possible even during automatic operation. There are 6 levels of adjustment possible with the button or the button.
WARM
Press the
When a change in temperature is desired.
1
■ Each time the
When +6 is indicatored, even if the
■ Each time the
When –6 is indicatored, even if the
Press the or button.
button is pushed, the switch over occurs in the following order –6 → –5 → ............ –1 → ±0 → +1 ............ +6.
button is pushed, the switch over occurs in the following order +6 → +5 → ............ +1 → ±0 → –1 ............ –6.
button.
button is pushed, the indicator does not change.
button is pushed, the indicator does not change.
– 8 –
Press the
COOL
button.
COOL/HEAT/DRY mode operation procedure
COOL
DRY
HEAT
26°C~28°C21°C~24°C22°C~24°C
Aim the remote control at the air-conditioner.
Air flow direction adjustment procedure. Page 10
NOTE
•
Air is not blown out during the operation.
Page 17
• The air-conditioners cannot be in different
operating modes at the same time, such as
one unit being in the “Cool” mode and one
unit being in the “Heat” mode.
1
2
3
4
Press the ON/OFF button.
Press the MODE select button.
Move the [ mark] to the desirable operation position.
(Cool), (Heat), (Dry)
Press the TEMP button.
Press or button for the desired temperature.
Standard
Press the FAN SPEED button
Set the air flow rate as desired.
To stop: Press the ON/OFF button.
Program changing procedure
Set the new program.
• The operation program can also be set or changed when
the air-conditioner is not in operation.
Concerning HIGH POWER operation
Pressing the HI POWER button intensifies the operating power and initiates a powerful cooling or heating operation for 15 minutes continuously.
The remote control illuminates but the wind capacity display is erased.
NOTE
• During the HIGH POWER operation, the room temperature is not
controlled. When it causes an excessive cooling or heating, press
the HI POWER button once more to cancel the HIGH POWER
operation.
• HIGH POWER operation is not available during the DRY opera-
tion.
• During ON timer operation, HIGH POWER operation will start
when the ON time is reached.
“HI POWER”
▲
• When the following operations are conducted HIGH POWER op-
eration will be canceled.
1 When the HI POWER button is pressed again.
2 When the operation mode is changed.
3 When ECONOMY operation is conducted.
Concerning ECONOMY operation
Pressing the ECONO button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operates
1.5°C higher than the setting temperature for the weak wind capacity during cooling or 2.5°C lower than that during heating. A message is
displayed on the remote control. The wind capacity display is erased.
NOTE
• If the ECONOMY operation is selected while operating with the
strong or medium wind capacity, it takes about 1 minute before the
wind capacity drops to the weak level.
• When the following operations are conducted ECONOMY opera-
tion will be canceled.
1 When the ECONO button is pressed again.
2 When HIGH POWER operation is selected.
“ECONO”
▲
– 9 –
Air flow direction adjustment procedure
Adjusting up/down air flow direction
■ Up/down direction can be adjusted with the AIRFLOW button on the remote control. Each time when you press this button the mode changes
as follows:
Change to AIRFLOW mode.
(Air scroll)
(Swing)
Air scroll
In COOL and DRY operation In HEAT operation
Stops at this position
for 5 seconds.
Thick line : moves quickly
Thin line
NOTE
• If the room temperature control (thermostat) switches to the heating mode or if the defrosting operation is on, the blow flap changes automatically to a horizontal
position.
• If the heating operation has just started and the room temperature is still low, it may take a while before the flap moves to the above sway operation angle.
• The flap may stop at the tilted down-blow position during the “sway operation” in the heating mode.
When you press the AIRFLOW button once while the flap is operating, it stops swinging at an angle.Since this angle is memorized in the microcomputer, the flap
will automatically be set at this angle when the next operation is started.
• Recommended angle of the flap when stopping
: moves slowly
Stops at this position
for 5 seconds.
Thick line
Thin line
MEMORY FLAP (FLAP STOPPED)
: moves quickly
: moves slowly
(Flap stopped)
SWING FLAP
Flap moves up and down
continuously.
HEAT
• Avoid constant airflow to the body for hours on end.
• When in COOL or DRY operation, do not operate for hours on end with the air flow blowing straight down. Otherwise, condensation
may appear on the outlet grill and drip down.
• Do not try to adjust the flaps by hand, as the control angle may change or the flap may not close properly.
(Slant forward
blowing)
COOL, DRY
DANGER
CAUTION
(Horizontal
blowing)
About FAN SPEED
■ You can choose the capacity of your air-conditioner when heating or cooling.
Operation capacity by your choice FAN SPEED
Set automatically by microcomputer AUTO
Powerful operation with high capacity HI
Standard operation MED
Energy-saving operation LO
• When changing FAN SPEED from HI to LO, the sound of
NOTE
refrigerant flowing may be heard.
– 10 –
OFF-TIMER operation procedure
■ The unit stops automatically at the end of the set period of time.
1
2
3
Changing of set time
Set a new time by using the OFF TIMER button.
Releasing procedure
Press the CANCEL button to turn off the timer indicator.
4
Example: You wish it to stop PM 10:30.
If the air-conditioner is not operating, aim the remote control at the air-conditioner.
Press the ON/OFF button.
Press the OFF TIMER button.
OFF TIMER indicator
Press the “ or ” button.
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00AM0:10AM0:20
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00PM11:50PM11:40
Set at PM 10:30.
Press the RESERVE button.
The indication changes from blinking to steady lighting and the setting is complete.
The timer light (yellow) is on.
is blinking.
OFF
AM
... ...
1:00AM1:10
PM
... ...
11:00PM10:50
⇓
• The unit stops at the end of the set period of time.
ON-TIMER operation procedure
■ If the room temperature is at near optimum temperature at the set time, the operation starts 5 to 60 minutes before the set time. Page 12
Example: In the case you wish to bring the temperature to nearly set temperature in at AM 8:00.
1
Press the ON TIMER button.
ON TIMER indicator ON is blinking.
Press the “ or ” button.
2
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00AM0:10AM0:20
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00PM11:50PM11:40
Set at AM 8:00.
Press the RESERVE button.
AM
... ...
1:00AM1:10
PM
... ...
11:00PM10:50
3
The indication changes from blinking to steady lighting and the setting is complete.
The timer light (yellow) is on.
• Operation starts 5 to 60 minutes before the set time.
• The TIMER light goes out at the set time.
⇓
Changing of set time
Set a new time by using the ON TIMER button.
Releasing procedure
Press the CANCEL button to turn off the timer indicator.
– 11 –
PROGRAM TIMER operation procedure
■ The timer operations that consist of the combination of the timer being set at both on and off. Once this has been set and operations started,
operations will commence and end at the same time every day as long as the ON/OFF button is not pressed.
Example: When it is desired to stop at 10:30 PM, and then start operation at 8:00 AM,
near the set temperature.
1
Press the ON/OFF button.
■ OFF TIMER operation setting
Set by the procedures on page 11.
Set to
■ ON TIMER operation setting
Set by the procedures on page 11.
Set to
The setting of the lighting of the timer light (yellow) of this unit is complete.
The time will be displayed on the remote control unit. The display will change
depending on the operational status.
Changing of set time
Set a new time by using the OFF TIMER or ON TIMER button.
Releasing procedure
Press the CANCEL button to turn off the timer indicator.
About TIMER operation
About Amenity facilities
Amenity facilities enable to start the operation a little earlier, so that the room approaches optimum temperature at ON time when the operation is started by ON-TIMER.
• Mechanism
The room temperature is checked 60 minutes before the timer is at ON. Depending on the temperature at that
time, the operation starts 5 to 60 minutes before the timer is at ON.
• The Amenity facility only functions for COOL and HEAT operation mode (including AUTO). It does not
work for DRY mode.
PM
.
OFF
AM
.
ON
ON OFF
(Stopped) (Operating)
ON OFF
In COOL operation
▼
(Stop) Operation starts
Set temperature
Check the room temp.
60 mins. in advance.
▼
(Operation)
Set time
Present time setting procedure
■ When inserting the batteries, the present time is automatically set to PM 1:00.
Example: Set to AM 10:30.
Press the TIME switch.
1
2
3
The timer is set on the basis of the present time, so please set it correctly.
Press with the tip of a ballpoint pen, etc.
The time indicator blinks and can be set to the current time.
Press the “ or ” button.
(Set to AM 10:30)
Press within
Press the RESERVE button.
The indication changes from blinking to steady lighting and the setting is complete.
NOTE
15 sec.!
– 12 –
Emergency run operation
• The unit ON/OFF button on the unit operates ON/OFF temporarily when the remote control is not used.
Operation program
• OPERATION MODE : AUTO
• FAN SPEED : AUTO
• AIR FLOW : AUTO
• Operation starts by pressing the unit ON/OFF button; it stops if you press the button again.
Remote control handling procedure
Replacing the batteries
The following cases signify exhausted batteries. Replace old batteries with new ones.
• Receiving beep is not emitted when a signal is transmitted.
• Indicator fades away.
■
When the indicator shows any abnormal condition, press the reset
Remove back lid and take out old batteries.
1
Insert new batteries. (SUM-4 or R03x2)
2
Attention to
the , and .
marks
switch with the tip of a ballpoint pen.
NOTE
• Don't use old and new batteries together.
• Remove the batteries when the remote control is not used for a
long period.
• The life of a battery conforming to JIS or IEC is 6 to 12 months
with normal use. If used longer, or when an unspecified battery
is used, liquid may leak from the battery, causing the remote
control to malfunction.
Unit ON/OFF button
Close back lid.
3
Press the reset switch with the tip of a ballpoint pen.
4
• On the battery is printed its expected life. This may be shorter
than that of the air-conditioner, depending on the date of manufacture.
• However, the battery may still be in working order after expiry
of its nominal life.
Using the remote control holder
The remote control can be attached to a wall or pillar by using a
remote control holder. Before installing the remote control, check
that the air-conditioner receives the signals properly.
For installing or removing the remote control, move it up or down
in the holder.
– 13 –
Warning note for remote control handling
• Don’t go near high temperature
places, such as an electric carpet
or stove.
• Don’t put any obstructing obsta-
cles between the remote control
and the unit.
• Don’t leave the remote control ex-
posed to direct sunlight or other
strong lighting.
• Don’t spill water etc on the remote
control.
• Don’t drop the remote control.
Handle with care.
• Do not place heavy objects on the
remote control, or step on it.
When the operation fails with the remote control
• Are the batteries running down? Page 13
Replace the batteries with new ones and repeat the operation.
• If the operation still fails, handle as per emergency
run operation.
Contact your dealer.
Page 13
Operating hints
■ Please observe the following for the most economic and comfortable use of your unit.
Set a suitable room temperature.
suitable
temperature
Excessively high or low temperatures are not
good for your health and waste electricity.
Adjust the airflow direction properly.
Clean the filters frequently.
Clogged filters may block the air flow and
cause less efficient operation.
Please request cleaning of the air filter from
special contractor.
Operate the unit only when needed.
Avoid direct sunlight and draught.
Cut out direct sunlight by drawing the curtains or blinds when cooling. Keep windows
and doors shut, except when ventilating.
Generate little heat when cooling.
Adjust the up/down and left/right airflow to
ensure a steady room temperature.
Use the timer properly to operate the unit
only when needed.
– 14 –
Keep heat sources out of the room as much as
possible.
Maintenance
Before maintenance
Turn off the power switch.
During the operational season
Cleaning the air filter
Please request cleaning of the air filter from special contractor.
NOTE
Cooling/heating is affected by an air filter clogged up with dust etc., and the operation noise becomes louder. It may also
use extra electricity. Please clean the air filter at appropriate intervals.
Don’t spill water.
There's a danger
of electric shock.
• Wipe the unit with a soft,
dry cloth.
Don’t use the following articles:
• Hot water (40°C or more)
It may deform or discolour the unit.
• Petrol, paint thinner, benzine or polish-
ing agents, etc.
They may deform or scratch the unit.
At the end of the season
Set the temperature setting for approximately a half
day at 30°C and perform the cooling operation.
1
Dry the inside of the unit.
Stop the unit and turn off the power switch.
2
The unit uses appr. 5W even when the power switch has been turned
off during the off-season for safety or for saving energy.
Clean and reinstall the air filters.
3
Clean both the indoor and outdoor units.
4
Remove batteries from the remote control.
5
At the beginning of the season
Make certain that there are no obstacles blocking the
1
air flow around the air intake and outlet openings of
the indoor and outdoor units.
Check the installation base for corrosion or rust.
2
Ensure that nothing has snapped and that the
earthed flex is not disconnected.
3
Ensure that the air filters are clean.
4
Turn on the power switch.
5
Insert batteries in the remote control.
6
– 15 –
Has the unit been installed correctly?
Suitable installation position
• Is there any obstruction in front of the indoor unit, preventing proper ventilation and functioning?
• Don’t install the unit in any of the following places:
• Where there is a danger of leaking inflammable gases.
• Where there is substantial splashing of oil.
• Malfunctioning due to corrosion may occur if the unit is installed in a spa where sulfide gases are generated, or in a seaside resort exposed to
sea breezes. Contact your dealer.
• The air-conditioner and remote control must be at least 1 metre away from a TV set or radio.
• Drain the dehumidified liquid from the indoor unit into a spot that drains well.
Pay attention to operating noises!
• When you install the unit, take care to choose a place that can comfortably stand the weight of the unit and does not increase the operating noise
or vibration. If there is any likelihood that vibration may be transmitted through the house, fix the unit with the aid of vibration-proof pads
between the unit and the fittings.
• Select a place where cold or hot air and operation noises from the indoor and outdoor units do not cause any inconvenience to your neighbours.
• Do not leave any obstacles near the outlet and inlet of the outdoor unit. This may cause malfunctioning and increased operating noise.
• If you hear an irregular noise during operation, contact your dealer.
Inspection and maintenance
Dependent upon service conditions and operating environment, the inside of the air-conditioner may become dirty after a number of seasons'
service (3 to 5 years). This will reduce performance. In addition to normal cleaning, we would recommend inspection and maintenance. (
conditioner has a longer life without any trouble.)
• Contact your dealer, or any distributor, for inspection and maintenance. (There will be a charge for this service).
• We would recommend inspection and maintenance to be carried out during the off-season.
• If the supply cord of this appliance is damaged, it must only be replaced by a repair shop appointed by the manufacturer, because special
purpose tools are required.
The air -
About the Multiple Air-conditioner
Simultaneous Operation
• The air-conditioners cannot be in different operating modes at the same time, such as one unit being in the “Cool” mode and one unit being in
the “Heat” mode.
• When conducting different operations, the air-conditioner that was operated first will be given priority, so the air-conditioner that is operated
after that will conduct air blowing operation.
• When you want to give priority to the air-conditioner that was started later, either stop the air-conditioner that has priority or cause the
operation type of the unit operated first to match that of the unit operated second.
Automatic Operation
• When the remote control operation switch is in the “Auto” mode the air-conditioner automatically selects either “Cool,” “Dry,” or “Heat” when
operation is started depending on the room temperature.
• During simultaneous operation of air-conditioner units, operation modes may be automatically changed in response to the temperatures of the
individual rooms; this will result in the operation of the outdoor unit being stopped. In such a case, COOL or HEAT mode should be used
instead of AUTO. (This is only relevant when more than one air-conditioner unit is being used.)
Refrigerant (oil) recovery operation
• If the all of the indoor units are not operated at the same time for an extended period, the cooling or heating performance may temporarily
decrease. This is in order to control the recovery of the refrigerant (oil) in the stopped indoor unit(s). At this time, the sound of refrigerant
flowing may be heard from the stopped indoor unit(s).
– 16 –
Troubleshooting
Please carry out the following checks before making a service call.
The air-conditioner does not work at all.
Has the power switch been
turned off?
Have you set the thermostat at a
suitable temperature?
suitable
temperature
Is there any direct sunlight entering the room?
Has the timer been set in the
"ON" position?
Poor cooling or heating
Is the air filter clean? (Not
clogged?)
Poor cooling
Is there a heat source in the
room?
Is there a power failure or a
blown fuse?
Did you leave any doors or
windows open?
Are there too many people in
the room?
If the air-conditioner does not operate properly after you have checked
the left points, or if any doubt still
exists after you have consulted page
17, or if things happen as shown on
page 18, switch off the power and
contact your dealer.
An alternative refrigerant (R410A) is used in this air-conditioner. When asking the
dealer for service or inspection and maintenance, explain the dealer about this matter.
Please remember!
You cannot restart the unit immediately after you have
stopped it.
(RUN light is on)
Not
operating?
Air is not blown out when starting the HEATING operation.
RUN light blinks slowly
(1.5 sec ON, 0.5 sec OFF)
Air is not blown out for 5 to 10 min. at HEATING operation.
RUN light blinks slowly
(1.5 sec ON, 0.5 sec OFF)
Restarting has been blocked for 3 minutes after you have stopped or
after switching off the power during operation, to protect the unit.
Please wait for
three minutes.
The three-minute protection timer in the microcomputer automatically
starts up again.
Air flow has stopped to prevent blowing out of cold air until the indoor
heat exchanger has warmed up. (2 to 5 min.) (HOT KEEP)
When outdoor temperature is low and humidity is high, the unit sometimes performs defrosting automatically. Please wait. During defrosting, water or steam may escape from the outdoor unit.
Air is not blown out when starting the DRY operation.
Some steam escapes during COOL operation.
The indoor fan may stop to prevent re-evaporation of dehumified
moisture and to save energy.
(RUN light is on)
This may occur if the room's temperature and humidity are very high.
It disappears as soon as the temperature and humidity decrease.
– 17 –
There is a slight smell. Air blown out during operation may smell. This is caused by tobacco
You hear a slight gurgling sound. This is caused by refrigerating liquid moving within the unit.
You hear a slight cracking sound. This is caused by heat expansion or contraction.
or cosmetics sticking to the unit.
After a power cut, you cannot re-start, even if power has been restored, unless you have the power blackout auto restart function.
Remote control signals are not received.
Moisture may form on the air outlet grills.
FAN operation will be performed even if COOL, DRY, or
HEAT have been selected.
Whistling noise is heard from the outdoor unit.
from the unit that is turned off.
The memory circuit of the microcomputer has been wiped out. Use the
remote control to start the operation again.
Remote control signals may not be received if the signal receiver on
the air-conditioner is exposed to direct sunlight or other bright light.
If so, cut out the sunlight or reduce the other light.
If the unit is operated for a long time in high humidity, moisture may
form on the air outlet grills and start dripping.
If one unit is operating in COOL mode while another is in operating in
HEAT or any other different operation mode, FAN mode operation
will be implemented. Individual operation modes need to be matched.
The noise means that the revolution speed is picking up on the compressor.
This is the sound when operation of another indoor unit is stopped.Sometimes a “Shooooo” sound might come for a short time
When to contact your distributor without delay
Turn off the power switch immediately and inform your dealer in any of the following situations:
The fuse or switch blows continuously.
Fuse often blows.
The TV, radio or other equipment
starts to malfunction.
When faulty movement is observed when the ON/OFF button is pressed, even after turning off the power switch and
restarting the operation after 3 minutes, the faulty movement does not disappear.
The cable becomes extremely hot.
The covering of the cable is cracked.
CAUTION
If the power cord becomes damaged, ask your dealer or a qualified engineer to install the
replacement to avoid accidents.
A switch does not activate properly. You hear a strange noise during opera-
The RUN and TIMER lights on the unit indication section
blink quickly (0.5 sec. ON; 0.5 sec. OFF) and don’t work.
3 minutes go
by, but, why ...
tion.
– 18 –
Air-conditioner operating conditions
■ Use within the following operational range. Operating outside of this range may result in the protection devices being activated, preventing the
unit from working.
Cooling operation Heating operation
Outside temperature
Inside temperature
Inside humidity
Approximately 21 to 43 °C (SCM45,60ZF-S) Approximately -10 to 21 °C (SCM45,60ZF-S)
Approximately -15 to 43 °C (SCM40,48,80ZF-S) Approximately -15 to 21 °C (SCM40,48,80ZF-S)
Approximately 21 to 32 °C (SCM45,60ZF-S)
Approximately 18 to 32 °C (SCM40,48,80ZF-S)
Below approximately 80%
The long-term use of the unit with a humidity level
exceeding 80% may result in condensation forming on the
surface of the indoor unit, leading to water drips.
Approximately 15 to 30 °C
—
Power Blackout Auto Restart Function
■ What is power blackout auto restart function?
• Power blackout auto restart function is a function that records the operational status of the air-conditioner immediately prior to it being switched off
by a power cut, and then automatically resumes operations at that point after the power has been restored.
• The following settings will be cancelled:
1 Timer settings
2 HIGH POWER operations
NOTE
• Ther power blackout auto restart function is set at on when the air-conditioner is shipped from the factory. Consult with your dealer if this
function needs to be switched off.
• When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.
Characteristics of HEAT mode operation
Mechanism and capacity of HEAT mode operation
■ Mechanism
• The unit draws in heat from the cold outside air, transfers it indoors and heats the room. The heating capacity of the heat pump mechanism decreases
when the outside air temperature gets colder.
• The hot air circulation system takes a while before warming up the room temperature.
• If the outside temperature becomes extremely low, it would be better to use an additional source of heating.
• If heating operation is performed when the outside temperature is high, room temperature may become higher than the set temperature.
Defrosting
If the outside temperature becomes low and humidity is high, the heat exchanger in the outdoor unit may frost over, which prevents efficient heating.
If this happens, the automatic defroster is activated and during defrosting the heating operation stops for 5 to 10 minutes.
• Both indoor and outdoor fans stop and the RUN light (green) blinks slowly (1.5 sec. ON, 0.5 sec. OFF) during defrosting.
• The outdoor unit may give off some steam during defrosting. This is to help the defrosting process and is not a defect.
• The HEAT operation resumes as soon as defrosting has been completed.
– 19 –
Self diagnosis function
■ We are constantly trying to do better service to our customers by installing such judges that show abnormality of each function as follows:
RUN light
1 time flash
Description of trouble
Heat exchanger sensor (1) error
Cause
• Broken heat exchanger sensor (1) wire, poor connector
connection
• Disconnected sensor
TIMER light ON
RUN light keeps flashing
2 time flash
4 time flash
5 time flash
6 time flash
7 time flash
TIMER light
1 time flash
2 time flash
4 time flash
5 time flash
6 time flash
1 time flash
2 time flash
3 time flash
Room temperature sensor error
Drain error
Heat exchanger sensor (2) error
Indoor fan motor error
Closed service valve
Heat exchanger sensor (1) error
Outdoor temperature sensor error • Broken outdoor sensor wire, poor connector connection
Outdoor heat exchanger fluid pipe
sensor error
Discharge pipe sensor error • Broken discharge pipe sensor wire, poor connector connection
Suction pipe sensor error • Broken suction pipe sensor wire, poor connector connection
Current cut
Trouble of outdoor unit
Over current
• Broken room temperature sensor wire, poor connector connection
• Drain at reverse gradient
• Float switch defective
• Broken heat exchanger sensor (2) wire, poor connector
connection
• Disconnected sensor
• Defective fan motor, poor connector connection
• Closed service valve
• Disconnected sensor
• Broken heat exchanger fluid pipe sensor wire, poor connector
connection
• Broken power transistor sensor wire, poor connector connectionPower transistor sensor error
• Compressor locking, open phase on compressor output,
shortcircuit on power transistor, closed service valve
• Broken power transistor, broken compressor wire
• Broken discharge pipe sensor wire, poor connector connection
• Compressor blockage
• Overload operation, overcharge
RUN light ON
RUN light 2 time flash
4 time flash
5 time flash
6 time flash Error of signal transmission
7 time flash
2 time flash
Over heat of power transistor
Over heat of compressor
Outdoor fan motor error
Rotor lock
• Cooling problem
• Gas shortage, defective discharge pipe sensor, closed service
valve
• Defective power supply, Broken signal wire, defective in/outdoor
unit boards
• Defective fan motor, poor connector connection
• Defective compressor
• Open phase on compressor
• Defective outdoor unit boards
– 20 –
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