Mitsubishi Heavy Industries SRRM25ZE User manual

This air conditioner complies with EMC Directive 89/336/EEC, LV
Directive 73/23/EEC.
AIR-CONDITIONING & REFRIGERATION SYSTEMS HEADQUARTERS
16-5, 2-Chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan
Fax: [phone]
MITSUBISHI HEAVY INDUSTRIES EUROPE, LTD.
AIR-CONDITIONER DIVISION
3rd Floor Thavies Inn House 3-4 Holborn Circus London EC1N 2HA, ENGLAND
Phone: [phone]
Fax: [phone]
USER’S MANUAL
AIR-CONDITIONER
RJD012A110.EN
ENGLISH
SRRM25ZE/ZF-S
SRRM35ZE/ZF-S
SRRM50ZE/ZF-S
SRRM60ZE/ZF-S
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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
Concerning HIGH POWER operation ......................................................................................... 9
Concerning ECONOMY operation .............................................................................................. 9
Air flow direction adjustment procedure .................................................................................... 10
About FAN SPEED .................................................................................................................... 10
OFF-TIMER operation procedure .............................................................................................. 10
ON-TIMER operation procedure................................................................................................ 11
PROGRAM TIMER operation procedure .................................................................................. 11
About TIMER operation............................................................................................................. 12
Present time setting procedure .................................................................................................... 12
Emergency run operation............................................................................................................ 12
Remote control handling procedure ........................................................................................... 13
When the operation fails with the remote control ...................................................................... 14
Operating hints ........................................................................................................................... 14
Maintenance................................................................................................................................ 14
Has the unit been installed correctly? ......................................................................................... 15
About the Multiple Air-conditioner ............................................................................................ 16
Troubleshooting .......................................................................................................................... 16
Please remember! ....................................................................................................................... 17
When to contact your distributor without delay ......................................................................... 18
Air-conditioner operating conditions.......................................................................................... 18
Power Blackout Auto Restart Function ...................................................................................... 18
Characteristics of HEAT mode operation .................................................................................. 19
Self diagnosis function ............................................................................................................... 20
ENGLISH
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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 “ DANGER” and “ CAUTION”. Precautions as shown in the column “ DANGER” indicate that
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:
•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.
Don’t swing from the system.
If the system falls down,
you may get injured.
Do not insert anything into the air
inlet of inside unit, outside unit.
This may cause injury, as the internal fan rotates at
high speed.
Do not expose yourself to the cooling
air for prolonged periods.
This could affect your physical condition and cause
health problems.
Make sure that you drain the hose properly, so that all the
water has dripped out.
Negligence may cause flooding in the room resulting in wet furniture.
Store the remote control out of reach
of infants.
Failure to observe this may result in the batteries
being swallowed or other accidents.
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.
Do not handle the switches with wet
hands.
This may cause an electric shock.
Do not install near places where inflammable gas may leak.
Gas leaks may cause fire.
LPG
Strictly prohibited Provide positive earthing
Make sure that the system has been properly earthed.
Earth cables should never be connected to a gas pipe, municipal water pipe, light-
ning conductor or telephone earth cable. Incorrect installation of the earth cable
may produce an electric shock.
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.
Observe instructions with
great care
❚INSTALLATION PRECAUTIONS
DANGER
CAUTION
❚OPERATION 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.
The system must be installed by your dealer or a qualified pro-
fessional.
It is not advisable to install the system yourself, as faulty handling may cause leak-
age of water, electric shock or fire.
CAUTION
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Do not place anything containing wa-
ter, like vases, on top of the unit.
Water entering the unit could damage the insula-
tion and therefore cause an electric shock.
The system should only be used for its original purpose
and not for anything else like, for instance, preservation of
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.
If the unit falls down or things drop off it, people
could get hurt.
After a long period of use, check the unit's
support structure from time to time.
If you don't repair any damage straightaway, the
unit may fall down and cause personal injury.
If you operate the system together with
a combustion appliance, you must regu-
larly ventilate the indoor air.
Insufficient ventilation may cause accidents due to
oxygen deficiency.
When you clean the system, stop the
unit and turn off the power switch.
Never clean the unit while the internal fan is rotating.
Do not wash the air-conditioner with wa-
ter.
This could cause an electric shock.
You should not expose any combus-
tion appliance directly to the air
stream of the air-conditioner.
The appliance may then work inadequately.
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.
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.
Stand firmly on a stepladder or other
stable object when removing the in-
take grill and filters.
Failure to observe this may result in injury through
insecure objects toppling over.
Consult your dealer for repairs to the
system.
Wrong repairs could cause an electric shock, fire, etc.
If you notice anything abnormal (smell of
burning, etc.), stop the system, turn off the
power switch and consult your dealer.
Continued use of the system in abnormal circum-
stances may result in malfunctioning, electric shock,
fire, etc.
If the air-conditioner is moved else-
where, contact your dealer or a pro-
fessional fitter.
Faulty installation may cause water leakage, elec-
tric shock, fire, etc.
❚PRECAUTIONS FOR TRANSFER OR REPAIRS
DANGER
Safety precautions
CAUTION
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.
Do not touch the aluminum fins on the
air heat exchanger.
Failure to observe this may result in injury.
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Page 10, 11
There are two timers, for ON and OFF. They can be set as desired.
Page 12
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.
Choice of operations and features
Features
Amenity facility
TIMER procedure
Page 8
Automatic selection of operating mode.
The Auto mode automati-
cally selects the operation
mode (HEAT, COOL or
DRY), depending on the
room temperature when
switched on.
AUTO
Page 9
Cooling by extracting heat from the room.
COOL
Choice of operations
Page 9
The unit draws in heat from the outside air, transfers it inside and
heats the room.
HEAT
Page 9
Drying by extracting damp from the room.
Functioning of microcomputer depends on setting and room tem-
peratures. It dehumidifies while keeping room temperature almost
constant.
DRY
Page 9
Turning up the power operates the air-conditioner in the power cool-
ing and heating mode.
HIGH POWER mode
Page 9
This is an economic and healthy level of operation.
ECONOMY mode
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SCM40ZF-S
SCM45ZD/ZF-S
SCM48ZF-S
SCM60ZD/ZF-S
Name of each part and its function
INDOOR UNIT
SRRM25ZE/ZF-S
SRRM35ZE/ZF-S
SRRM50ZE/ZF-S
SRRM60ZE/ZF-S
OUTDOOR UNIT
SCM80ZD/ZF-S
Air inlet
(on side & rear surface)
Air outlet
Wireless remote control
Page 7
Drain hose
Drains water from the dehumidified air.
Air outlet
Air blows out of here.
Remote control signal receiver
Air inlet
Draws in the indoor air.
Unit indication & operation section
Air filter
Removes dust or dirt from the inlet air.
Page 15
Refrigerant piping connection
electric flex
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Unit indication section
Representative installation examples
Ceiling recessed type
Ceiling suspension type
RUN (HOT KEEP) light (green)
•Illuminates during operation.
•Blinks at air flow stop due to the ‘HOT KEEP’.
Page 17
ECONO light (orange)
Illuminates during ECONOMY operation.
TIMER light (yellow)
Illuminates during TIMER operation.
HI POWER light (green)
Illuminates during HIGH POWER 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 12
Remote control signal receiver
Air outlet (Local arrangements part)
Remote control signal receiver
Air inlet grill
(Optional part or Local arrangements part)
Remote control signal receiver
Air outlet (Local arrangements part)
Air inlet grill
(Optional part or Local arrangements part)
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LO
MED
HI
AUTO
HI POWER ECONO
ON OFF
AM PM
Operation and indication section for remote control
Operation section
FAN SPEED button
Each time the button is pushed, the indi-
cator is switched over in turn.
•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 indi-
cator is switched over in turn.
AIR FLOW button
This button changes the flap mode. When
pressed, this button changes the mode in the
following order:
This button is not used.
(Air flow direction adjustment can not be
performed.)
Page 10
ON/OFF button
Press for starting operation, press again for
stopping.
HI POWER button
This button changes the HIGH POWER
mode.
Page 9
ECONO button
This button changes the ECONOMY mode.
Page 9
RESET switch
Switch for resetting microcomputer.
Page 13
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 10
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.
Indication section
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
Air flow direction adjustment can not be per-
formed.
HIGH POWER MODE indicator
Indicates during high power mode operation.
ECONOMY MODE indicator
Indicates during economy mode operation.
ON TIMER indicator
Indicates during ON TIMER operation.
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.
OPERATION MODE indicator
Indicates selected operation with lamp.
[ (Auto) • (Cool) • (Heat) • (Dry)]
(Flap stopped)
(Air scroll) (Swing)
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Aim the remote control at the air-conditioner.
Press the ON/OFF button.
When the unit is not in AUTO mode:
Press MODE button.
Move the [ mark] to the (Auto) position.
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.
1
AUTO mode operation procedure
■Automatically selects the operation mode (HEAT, DRY, COOL) depending on the room temperature when switched on.
2
NOTE
WARM
Press the button.
COOL
Press the button.
1
When a change in temperature is desired.
Press the or button.
•If you don’t want the AUTO mode program, change to
HEAT, DRY or COOL instead of AUTO.
Page 9
AUTO mode can be
operated by simply
pressing the ON/OFF
button.
To stop: Press the ON/OFF button.
■Each time the button is pushed, the switch over occurs in the following order –6 →–5 →............ –1 →±0 →+1 ............ +6.
When +6 is indicatored, even if the button is pushed, the indicator does not change.
■Each time the button is pushed, the switch over occurs in the following order +6 →+5 →............ +1 →±0 →–1 ............ –6.
When –6 is indicatored, even if the button is pushed, the indicator does not change.
•Air is not blown out during the op-
eration.
Page 17
•Simultaneous automatic operation.
Page 16
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1
2
COOL/HEAT/DRY mode operation procedure
Program changing procedure
Set the new program.
•The operation program can also be set or changed when
the air-conditioner is not in operation.
Aim the remote control at the air-conditioner.
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.
4
3
COOL
DRY
HEAT
26°C~28°C21°C~24°C22°C~24°C
To stop: Press the ON/OFF button.
NOTE
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.
1When the ECONO button is pressed again.
2When HIGH POWER operation is selected.
•
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.
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.
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
•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”
▲
“ECONO”
▲
•When the following operations are conducted HIGH POWER op-
eration will be canceled.
1When the HI POWER button is pressed again.
2When the operation mode is changed.
3When ECONOMY operation is conducted.
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Air flow direction adjustment procedure
Adjusting up/down air flow direction
■Air flow direction adjustment can not be performed, although a display will be changed if "AIR FLOW" button is pushed.
Change to AIRFLOW mode.
(Air scroll) (Swing) (Flap stopped)
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
About FAN SPEED
■You can choose the capacity of your air-conditioner when heating or cooling.
1
2
OFF-TIMER operation procedure
■The unit stops automatically at the end of the set period of time.
3
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
OFF
is blinking.
Press the “or ”button.
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00
AM
0:10
AM
0:20
... ...
AM
1:00
AM
1:10
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00
PM
11:50
PM
11:40
... ...
PM
11:00
PM
10:50
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.
⇓
•The unit stops at the end of the set period of time.
4
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.
NOTE
•When changing FAN SPEED from HI to LO, the sound of
refrigerant flowing may be heard.
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ON-TIMER operation procedure
1
2
Changing of set time
Set a new time by using the ON TIMER button.
Example: In the case you wish to bring the temperature to nearly set temperature in at AM 8:00.
Press the ON TIMER button.
ON TIMER indicator
ON
is blinking.
Press the “or ”button.
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00
AM
0:10
AM
0:20
... ...
AM
1:00
AM
1:10
Each time the button is pressed, the indicator is switched in the order of:
AM
0:00
PM
11:50
PM
11:40
... ...
PM
11:00
PM
10:50
Set at AM 8:00.
Press the RESERVE button.
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.
Releasing procedure
Press the CANCEL button to turn off the timer indicator.
3
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.
Press the ON/OFF button.
■OFF TIMER operation setting
Set by the procedures on page 10.
Set to
OFF
PM
.
■ON TIMER operation setting
Set by the above mentioned ON TIMER operation procedures.
Set to
ON
AM
.
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.
ON OFF ON OFF
1
(Stopped) (Operating)
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.
■ Operation starts 5 to 60 minutes before the time that is set so that the room temperature reaches the optimum temperature at that time. Page 12
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About TIMER operation
About Amenity facilities
Amenity facilities enable to start the operation a little earlier, so that the room approaches optimum tempera-
ture 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.
In COOL operation
(Stop) Operation starts
▼
Set temperature
Check the room temp.
60 mins. in advance.
Set time
▼
(Operation)
2
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.
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 the RESERVE button.
The indication changes from blinking to steady lighting and the setting is complete.
The timer is set on the basis of the present time, so please set it correctly.
1
3
NOTE
Press within
15 sec.!
Emergency run operation
•The 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
•Operation starts by pressing the ON/OFF button; it stops if you press the button again.
Unit ON/OFF button
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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.
•On the battery is printed its expected life. This may be shorter
than that of the air-conditioner, depending on the date of manu-
facture.
•However, the battery may still be in working order after expiry
of its nominal life.
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.
Remove back lid and take out old batteries.
Insert new batteries. (SUM-4 or R03x2)
Close back lid.
■
When the indicator shows any abnormal condition, press the reset
switch with the tip of a ballpoint pen.
1
2
3
Attention to
the ,and .
marks
Press the reset switch with the tip of a ballpoint pen.
4
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.
•Don’t drop the remote control.
Handle with care.
•Don’t go near high temperature
places, such as an electric carpet
or stove.
•Do not place heavy objects on the
remote control, or step on it.
Warning note for remote control handling
• Don’t put any obstructing obstacles
between the remote control and the
remote control signal receiver.
•Don’t spill water etc on the remote
control.
•Don’t leave the remote control ex-
posed to direct sunlight or other
strong lighting.
Using the remote control holder
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•Are the batteries running down? Page 13
Replace the batteries with new ones and repeat the operation.
Operating hints
■Please observe the following for the most economic and comfortable use of your unit.
Set a suitable room temperature.
Excessively high or low temperatures are not
good for your health and waste electricity.
Avoid direct sunlight and draught.
Cut out direct sunlight by drawing the cur-
tains or blinds when cooling. Keep windows
and doors shut, except when ventilating.
Operate the unit only when needed.
Use the timer properly to operate the unit
only when needed.
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.
According to handling directions of
local arrangements part, adjust the
airflow direction properly.
Adjust the up/down and left/right airflow to
ensure a steady room temperature.
Generate little heat when cooling.
Keep heat sources out of the room as much as
possible.
When the operation fails with the remote control
•If the operation still fails, handle as per emergency
run operation.
Contact your dealer.
Page 12
suitable
temperature
Turn off the power switch.
Maintenance
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.
Don’t spill water.
Before maintenance
•There's a danger of
electric shock.
•Wipe the unit with a
soft, dry cloth.
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At the end of the season
Stop the unit and turn off the power switch.
The unit uses appr. 5W even when the power switch has been turned
off during the off-season for safety or for saving energy.
At the beginning of the season
Ensure that nothing has snapped and that the
earthed flex is not disconnected.
Make certain that there are no obstacles blocking the
air flow around the air intake and outlet openings of
the indoor and outdoor units.
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.
1
2
Remove batteries from the remote control.
Clean both the indoor and outdoor units.
Clean and reinstall the air filters.
* The air filter that comes with the unit cannot be washed with water.
Set the temperature setting for approximately a half
day at 30°C and perform the cooling operation.
Dry the inside of the unit.
3
4
5
Check the installation base for corrosion or rust.
Insert batteries in the remote control.
Turn on the power switch.
Ensure that the air filters are clean.
* The air filter that comes with the unit cannot be washed with water.
1
2
3
4
5
6
During the operational season
Cleaning the air filter
Please request cleaning of the air filter from special contractor.
* The air filter that comes with the unit cannot be washed with water.
Has the unit been installed correctly?
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. (
The air -
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.
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.
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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).
The air-conditioner does not work at all.
Has the timer been set in the
"ON" position?
Has the power switch been
turned off?
Is there a power failure or a
blown fuse?
Troubleshooting
Please carry out the following checks before making a service call.
Poor cooling
Poor cooling or heating
Did you leave any doors or
windows open?
Have you set the thermostat at a
suitable temperature?
Is there a heat source in the
room?
Are there too many people in
the room?
Is the air filter clean? (Not
clogged?)
suitable
temperature
Is there any direct sunlight en-
tering the room?
If the air-conditioner does not oper-
ate 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.
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Please remember!
You cannot restart the unit immediately after you have
stopped it.
(RUN light is on)
Not
operating?
Please wait for
three minutes.
Air is not blown out when starting the HEATING operation.
RUN light blinks slowly
(1.5 sec ON, 0.5 sec OFF)
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)
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)
When outdoor temperature is low and humidity is high, the unit some-
times performs defrosting automatically. Please wait. During defrost-
ing, water or steam may escape from the outdoor unit.
Air is not blown out when starting the DRY operation.
(RUN light is on)
The indoor fan may stop to prevent re-evaporation of dehumified
moisture and to save energy.
Some steam escapes during COOL operation. This may occur if the room's temperature and humidity are very high.
It disappears as soon as the temperature and humidity decrease.
If the unit is operated for a long time in high humidity, moisture may
form on the air outlet grills and start dripping.
There is a slight smell. Air blown out during operation may smell. This is caused by tobacco
or cosmetics sticking to the unit.
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.
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.
After a power cut, you cannot re-start, even if power has been re-
stored, unless you have the power blackout auto restart function.
The memory circuit of the microcomputer has been wiped out. Use the
remote control to start the operation again.
Remote control signals are not received.
Moisture may form on the air outlet grills.
The noise means that the revolution speed is picking up on the com-
pressor.
Whistling noise is heard from the outdoor unit.
This is the sound when operation of another indoor unit is stopped.Sometimes a “Shooooo”sound might come for a short time
from the unit that is turned off.
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.
FAN operation will be performed even if COOL, DRY, or
HEAT have been selected.
Restarting has been blocked for 3 minutes after you have stopped or
after switching off the power during operation, to protect the unit.
The three-minute protection timer in the microcomputer automatically
starts up again.
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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 continu-
ously. The cable becomes extremely hot.
The covering of the cable is cracked.
The TV, radio or other equipment
starts to malfunction.
When faulty movement is observed when the ON/OFF but-
ton is pressed, even after turning off the power switch and
restarting the operation after 3 minutes, the faulty move-
ment does not disappear.
A switch does not activate properly. You hear a strange noise during opera-
tion.
3 minutes go
by, but, why ...
Fuse often blows.
The RUN and TIMER lights on the unit indication section
blink quickly (0.5 sec. ON; 0.5 sec. OFF) and don’t work.
CAUTION
If the power cord becomes damaged, ask your dealer or a qualified engineer to install the
replacement to avoid accidents.
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.
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:
1Timer settings
2HIGH POWER operations
•The 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.
NOTE
Cooling operation Heating operation
Outside temperature 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)
Inside temperature Approximately 21 to 32 °C (SCM45,60ZF-S) Approximately 15 to 30 °C
Approximately 18 to 32 °C (SCM40,48,80ZF-S)
Below approximately 80%
The long-term use of the unit with a humidity level
Inside humidity exceeding 80% may result in condensation forming on the —
surface of the indoor unit, leading to water drips.
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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.
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.
•If heating operation is performed when the outside temperature is high, room temperature may become higher than the set temperature.
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