Panasonic U-4ML5 Manual

Panasonic Klimaanlæg U-4ML5

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Operation manual
Urban Multi air conditioner English
Bedienungsanleitung
Urban Multi Klimaanlage Deutsch
Manuel d'utilisation
Unités extérieures Urban Multi Français
Gebruiksaanwijzing
Urban Multi airconditioner Nederlands
Manual de operación
Acondicionador de aire Urban Multi Español
Manuale d'uso
Climatizzatore Urban Multi Italiano
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Manual de operações
Ar condicionado Urban Multi Portugues
U-5MX4
U-8MX4
U-10MX4
U-12MX4
U-14MX4
U-16MX4
U-18MX4
U-8ME4✽M
U-10ME4✽M
U-12ME4✽M
U-14ME4✽M
U-16ME4✽M
U-8ME4
U-10ME4
U-12ME4
U-14ME4
U-16ME4
U-4ML5
U-5ML5
U-6ML5
OPERATION MANUAL
URBAN MULTI AIR CONDITIONER
4
4.1
2+3
1
1
4.2
2+3
1
1
4.3
10
2+3
1
3
1
2
1
1
6
3+5
2
4
5
2+4
1
3
7
UNIT NO.
1 2 34
2
1
2
8
C
D
A
B
9
ML5 MX4 ME4 (= ME4 M + ME4✽ ✽M)
ML5 MX4 ME4 (= ME4 M + ME4✽ ✽M)ME4
1
5
53
4
6
1
5
5
64
1
4 3
2
7
6
5
1
5
4
5
4
ME4
1
2
3
4.1
4.2
4.3
6
7
8
9
10
5
U-5~18MX4 + U-8~16ME4✽M + U-8~16ME4 + U-4~6ML5
Urban Multi air conditioner
4PW40727-1A
Operation manual
1
CONTENTS Page
1. Safety cautions ..........................................................................1
2. Important information regarding the refrigerant used ................ 2
3. What to do before operation ......................................................2
4. Remote controller.......................................................................3
5. Changeover switch: Name and function of each switch.............3
6. Operation range.........................................................................3
7. Operation procedure..................................................................3
7.1. Cooling, heating, fan only, and automatic operation ....................3
7.2. Program dry operation ................................................................. 4
7.3. Adjusting the air flow direction ..................................................... 4
7.4. Setting the master remote controller............................................ 5
7.5. Precautions for group control system or two remote controller
control system ..............................................................................5
8. Energy saving and optimum operation ......................................5
9. Maintenance ..............................................................................5
9.1. Maintenance after a long stop period...........................................5
9.2. Maintenance before a long stop period........................................ 6
10. Following symptoms are not air conditioner troubles ................. 6
11. Troubleshooting.......................................................................... 7
12. After-sales service and warranty................................................7
12.1. After-sales service .......................................................................7
12.2. Shortening of "maintenance cycle" and "replacement cycle"
needs to be considered in following situations .............................8
1. SAFETY CAUTIONS
Read the following cautions carefully and use your equipment
properly.
Keep these warning sheets handy so that you can refer to them
if needed.
Also, if this equipment is transferred to a new user, make sure to
hand over this user's manual to the new user.
Warnings
■It is not good for your health to expose your body to the air flow
for a long time.
■In order to avoid electric shock, fire or injury, or if you detect any
abnormality such as smell of fire, turn off the power supply and
call your dealer for instructions.
■Ask your dealer for installation of the air conditioner.
Incomplete installation performed by yourself may result in a
water leakage, electric shock, and fire.
■Do not place objects in direct proximity of the outdoor unit and
do not let leaves and other debris accumulate around the unit.
Leaves are a hotbed for small animals which can enter the unit.
Once in the unit, such animals can cause malfunctions, smoke
or fire when making contact with electrical parts.
■Ask your dealer for improvement, repair, and maintenance.
Incomplete improvement, repair, and maintenance may result in
a water leakage, electric shock and fire.
■Do not insert fingers, rods or other objects into the air inlet or
outlet. When the fan is rotating at high speed, it will cause injury.
■Never let the indoor unit or the remote controller get wet.
It may cause an electric shock or a fire.
■Never use a flammable spray such as hair spray, lacquer or paint
near the unit.
It may cause a fire.
■Never touch the air outlet or the horizontal blades while the
swing flap is in operation.
Fingers may become caught or the unit may break down.
■Never replace a fuse with that of wrong ampere ratings or other
wires when a fuse blows out.
Use of wire or copper wire may cause the unit to break down or
cause a fire.
■Never put any objects into the air inlet or outlet.
Objects touching the fan at high operating speed can be
dangerous.
■Never press the button of the remote controller with a hard,
pointed object.
The remote controller may be damaged.
■Never pull or twist the electric wire of the remote controller.
It may cause the unit to malfunction.
■Never inspect or service the unit by yourself.
Ask a qualified service person to perform this work.
■To prevent refrigerant leak, contact your dealer.
When the system is installed and runs in a small room, it is
required to keep the concentration of the refrigerant, if by any
chance coming out, below the limit. Otherwise, oxygen in the
room may be affected, resulting in a serious accident.
■The refrigerant in the air conditioner is safe and normally does
not leak. If the refrigerant leaks in the room, contact with a fire of
a burner, a heater or a cooker may result in a harmful gas.
Turn off any combustible heating devices, ventilate the room and
contact the dealer where you purchased the unit.
Do not use the air conditioner until a service person confirms
that the portion where the refrigerant leaks is repaired.
■Improper installation or attachment of equipment or accessories
could result in electric shock, short-circuit, leaks, fire or other
damage to the equipment. Be sure to use only accessories
made by Panasonic which are specifically designed for use with
the equipment and have them installed by a professional.
■Ask your dealer to move and reinstall the air conditioner.
Incomplete installation may result in a water leakage, electric
shock, and fire.
U-5~18MX4
U-8~16ME4✽
M
U-8~16ME4
U-4~6ML5
Urban Multi air conditioner Operation manual
Thank you for purchasing this Panasonic air conditioner.
Carefully read this operation manual before using the air
conditioner. It will tell you how to use the unit properly and
help you if any trouble occurs. After reading the manual,
file it away for future reference.
WARNING
Improper handling can lead to such serious consequences
as death, severe injury or damage to the equipment.
NOTE These instructions will ensure proper use of the
equipment.
Be sure to follow these important safety cautions.
Operation manual
2
U-5~18MX4 + U-8~16ME4✽M + U-8~16ME4 + U-4~6ML5
Urban Multi air conditioner
4PW40727-1A
Cautions
■Do not use the air conditioner for other purposes.
In order to avoid any quality deterioration, do not use the unit for
cooling precision instruments, food, plants, animals or works of
art.
■In order to avoid injury, do not remove the fan guard of the
outdoor unit.
■To avoid oxygen deficiency, ventilate the room sufficiently if
equipment with burner is used together with the air conditioner.
■After a long use, check the unit stand and fitting for damage.
If damaged, the unit may fall and result in injury.
■Do not place a flammable spray bottle near the air conditioner
and do not use sprays.
Doing so may result in a fire.
■Before cleaning, be sure to stop the operation, turn the breaker
off or pull out the supply cord.
Otherwise, an electric shock and injury may result.
■Do not operate the air conditioner with a wet hand.
An electric shock may result.
■Do not place items which might be damaged by moisture under
the indoor unit.
Condensation may form if the humidity is above 80%, if the drain
outlet is blocked or the filter is polluted.
■Do not place appliances which produce open fire in places
exposed to the air flow from the unit or under the indoor unit. It
may cause incomplete combustion or deformation of the unit
due to the heat.
■Do not allow anyone to mount on the outdoor unit or avoid
placing any object on it.
Falling or tumbling may result in injury.
■Never expose little children, plants or animals directly to the air
flow.
Adverse influence to little children, animals and plants may
result.
■Do not wash the air conditioner with water.
Electric shock or fire may result.
■Do not install the air conditioner at any place where flammable
gas may leak out.
If the gas leaks out and stays around the air conditioner, a fire
may break out.
■In order to avoid electric shock or fire, make sure that an earth
leak detector is installed.
■Be sure the air conditioner is electrically earthed.
In order to avoid electric shock, make sure that the unit is
grounded and that the earth wire is not connected to gas or
water pipe, lightning conductor or telephone earth wire.
■Arrange the drain hose to ensure smooth drainage. Incomplete
drainage may cause wetting of the building, furniture etc.
■Do not let children play on and around the outdoor unit.
If they touch the unit carelessly, it may result in injury.
■Do not place a flower vase or anything containing water on the
unit.
Water may enter the unit, causing an electric shock or fire.
■Do not place the controller exposed to direct sunlight.
The LCD display may get discolored, failing to display the data.
■Do not wipe the controller operation panel with benzine, thinner,
chemical dustcloth, etc.
The panel may get discolored or the coating peeled off. If it is
heavily dirty, soak a cloth in water-diluted neutral detergent,
squeeze it well and wipe the panel clean. Wipe it with another
dry cloth.
■Never touch the internal parts of the controller.
Do not remove the front panel. Some parts inside are dangerous
to touch and a machine trouble may happen. For checking and
adjusting the internal parts, contact your dealer.
■Avoid placing the controller in a spot splashed with water.
Water coming inside the machine may cause an electric leak or
may damage the internal electronic parts.
■Do not operate the air conditioner when using a room fumigation
- type insecticide.
Failure to observe could cause the chemicals to become
deposited in the unit, which could endanger the health of those
who are hypersensitive to chemicals.
■Do not touch the heat exchanger fins.
These fins are sharp and could result in cutting injuries.
■The appliance is not intended for use by young children or infirm
persons without supervision.
■Young children should be supervised to ensure that they do not
play with the appliance.
2. IMPORTANT INFORMATION
REGARDING
THE REFRIGERANT USED
This product contains fluorinated greenhouse gases covered by the
Kyoto Protocol.
Refrigerant type: R410A
GWP(1) value: 1975
(1) GWP = global warming potential
Periodical inspections for refrigerant leaks may be required
depending on European or local legislation. Please contact your local
dealer for more information.
3. WHAT TO DO BEFORE OPERATION
This operation manual is for the following systems with standard
control. Before initiating operation, contact your dealer for the
operation that corresponds to your system type and mark.
If your installation has a customized control system, ask your dealer
for the operation that corresponds to your system.
Outdoor units (See figure 1)
Names and functions of parts (See figure 1)
(figure 1 shows systems with changeover remote control switches.)
Cool/heat
changeover
remote control
switch Operation modes
Heat pumps MX4 series ❏ yes ❏ no
Heat pumps ML5 series ❏ yes ❏ no
Heat recovery series
Heat pumps ME4 series ❏ yes ❏ no
1Outdoor unit
2Indoor unit
3Remote controller
4Inlet air
5Outlet air
6Cool/heat changeover remote control switch
7HR unit
U-5~18MX4 + U-8~16ME4✽M + U-8~16ME4 + U-4~6ML5
Urban Multi air conditioner
4PW40727-1A
Operation manual
3
4. REMOTE CONTROLLER
Refer to the operation manual of the remote controller.
5. CHANGEOVER SWITCH: NAME AND
FUNCTION OF EACH SWITCH (See figure 2)
1FAN ONLY/AIR CONDITIONING SELECTOR SWITCH
Set the switch to for fan only operation or to for heating or
cooling operation.
2COOL/HEAT CHANGEOVER SWITCH
Set the switch to for cooling or to for heating operation.
6. OPERATION RANGE
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
7. OPERATION PROCEDURE
■Operation procedure varies according to the combination of
outdoor unit and remote controller. Read "3. What to do before
operation" on page 2.
■To protect the unit, turn on the main power switch 6 hours before
operation.
■If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
7.1. Cooling, heating, fan only, and automatic
operation (See figure 3 and figure 4.1)
■Changeover cannot be made with a remote controller whose
display shows (change-over under centralized control).
■When the display (change-over under centralized control)
flashes, refer to "7.4. Setting the master remote controller" on
page 5.
■Automatic operation can be selected only for ME4 series.
■The fan may keep on running for about 1 minute after the
heating operation stops.
■The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
For systems without cool/heat changeover remote control
switch (See figure 3)
1Press the operation mode selector button several times and
select the operation mode of your choice.
2Press the on/off button.
The operation lamp lights up and the system starts operation.
For systems with cool/heat changeover remote control switch
1Select operation mode with the cool/heat changeover remote
control switch as follows:
2Press the on/off button.
The operation lamp lights up and the system starts operation.
Adjustment
For programming temperature, fan speed and air flow direction, refer
to the operation manual of the remote controller.
Stopping the system
3Press the on/off button once again.
The operation lamp goes off and the system stops operation.
U-5~18MX4
U-8~16ME4✽M
U-8~16ME4 U-4~6ML5
Outdoor
temperature
–5~43°C DB –20~21°C DB –5~46°C DB –20~24°C DB(*)
(*) Range for operation: –20~–15°C WB. Range for continuous operation:
–15~15.5°C WB.
–20~15.5°C WB –20~15.5°C WB
Indoor
temperature
21~32°C DB 15~27°C DB 21~32°C DB 15~27°C DB
14~25°C WB 14~25°C WB
Indoor
humidity ≤80%
(†)
(†) to avoid condensation and water dripping out the unit.
If the temperature or the humidity is beyond these conditions, safety devices may
work and the air conditioner may not operate.
≤80%(†)
Cooling operation
Heating operation
Automatic operation
Fan only operation
NOTE Automatic operation (for ME4 series only)
In the automatic operation mode, cool/heat changeover
is automatically conducted.
Cooling operation (figure 4.1)
Heating operation (figure 4.2)
Fan only operation (figure 4.3)
NOTE Do not turn off power immediately after the unit stops,
but wait for at least 5 minutes.
Operation manual
4
U-5~18MX4 + U-8~16ME4✽M + U-8~16ME4 + U-4~6ML5
Urban Multi air conditioner
4PW40727-1A
Explanation of heating operation
It may take longer to reach the set temperature for general heating
operation than for cooling operation.
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
Defrost operation
■In heating operation, freezing of the outdoor unit coil increases.
Heating capability decreases and the system goes into defrost
operation.
■The indoor unit fan stops and the remote controller displays
.
■After maximum 10 minutes of defrost operation, the system
returns to heating operation again.
Hot start
■In order to prevent cold air from blowing out of an indoor unit at
the start of heating operation, the indoor fan is automatically
stopped. The display of the remote controller shows .
It may take some time before the fan starts. This is not a
malfunction.
7.2. Program dry operation
■The function of this program is to decrease the humidity in your
room with minimal temperature decrease (minimal room
cooling).
■The micro computer automatically determines temperature and
fan speed (cannot be set by the remote controller).
■The system does not go into operation if the room temperature
is low (<20°C).
For systems without cool/heat changeover remote control
switch (See figure 5)
1Press the operation mode selector button several times and
select (program dry operation).
2Press the on/off button.
The operation lamp lights up and the system starts operation.
3Press the air flow direction adjust button. (Only for Double-flow,
Multi-flow, Corner, Ceiling-suspended and Wall-mounted.) Refer
to "7.3. Adjusting the air flow direction" on page 4 for details.
Stopping the system
4Press the on/off button once again.
The operation lamp goes off and the system stops operation.
For systems with cool/heat changeover remote control switch
(See figure 6)
1Select cooling operation mode with the cool/heat changeover
remote control switch.
2Press the operation mode selector button several times and
select (program dry operation).
3Press the on/off button.
The operation lamp lights up and the system starts operation.
4Press the air flow direction adjust button. (Only for Double-flow,
Multi-flow, Corner, Ceiling-suspended and Wall-mounted.) Refer
to "7.3. Adjusting the air flow direction" on page 4 for details.
Stopping the system
5Press the on/off button once again.
The operation lamp goes off and the system stops operation.
7.3. Adjusting the air flow direction
Refer to the operation manual of the remote controller.
Movement of the air flow flap (See figure 8)
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
The air flow direction can be adjusted in one of the following ways.
■The air flow flap itself adjusts its position.
■The air flow direction can be fixed by the user.
■Automatic " " and desired position " ".
NOTE ■The heating capacity drops when the outside
temperature falls. If this happens, use another
heating device together with the unit. (When using
together with appliances that produce open fire,
ventilate the room constantly.)
Do not place appliances that produce open fire in
places exposed to the air flow from the unit or
under the unit.
■It takes some time to heat up the room from the
time the unit is started since the unit uses a hot-air
circulating system to heat the entire room.
■If the hot air rises to the ceiling, leaving the area
above the floor cold, we recommend that you use
the circulator (the indoor fan for circulating air).
Contact your dealer for details.
NOTE Do not turn off power immediately after the unit stops,
but wait for at least 5 minutes.
NOTE Do not turn off power immediately after the unit stops,
but wait for at least 5 minutes.
ADouble-flow + Multi-flow units
BCorner units
CCeiling-suspended units
DWall-mounted units
COOLING HEATING
• When the room temperature is lower than
the set temperature.
• When starting operation.
• When the room temperature is higher than
the set temperature.
• At defrost operation.
• When operating continuously at horizontal air flow direction.
• When continuous operation with downward air flow is performed at the time of cooling with a
ceiling-suspended or a wall-mounted unit, the microcomputer may control the flow direction,
and then the remote control indication also will change.
NOTE ■The movable limit of the flap is changeable.
Contact your dealer for details. (Only for Double-
flow, Multi-flow, Corner, Ceiling-suspended and
Wall-mounted.)
■Avoid operating in the horizontal direction
" ". It may cause dew or dust to settle on the
ceiling.
U-5~18MX4 + U-8~16ME4 M + U-8~16ME4 + U-4~6ML5✽
Urban Multi air conditioner
4PW40727-1A
Operation manual
5
7.4. Setting the master remote controller
When the system is installed as shown in figure 9 (MX4 + ML5 – the
outdoor unit is connected to several indoor units) and figure 10
(
ME4
– one HR unit is connected to several indoor units), it is
necessary to designate one of the remote controllers as the master
remote controller.
■Only the master remote controller can select heating or cooling
and in case of ME4 units, automatic operation.
■The displays of slave remote controllers show (change-
over under centralized control) and slave remote controllers
automatically follow the operation mode directed by the master
remote controller.
However, it is possible to changeover to program dry with slave
remote controllers if the system is in cooling operation set by the
master remote controller.
How to designate the master remote controller
1Press the operation mode selector button of the current master
remote controller for 4 seconds.
The display showing (change-over under centralized
control) of all slave remote controllers connected to the same
outdoor unit or HR unit flash.
2Press the operation mode selector button of the controller that
you wish to designate as the master remote controller. Then
designation is completed. This remote controller is designated
as the master remote controller and the display showing
(change-over under centralized control) vanishes.
The displays of other remote controllers show (change-
over under centralized control).
7.5. Precautions for group control system or two
remote controller control system
This system provides two other control systems beside individual
control (one remote controller controls one indoor unit) system.
Confirm the following if your unit is of the following control system
type.
■Group control system
One remote controller controls up to 16 indoor units. All indoor
units are equally set.
■Two remote controller control system
Two remote controllers control one indoor unit (in case of group
control system, one group of indoor units). The unit is
individually operated.
8. E NERGY SAVING AND OPTIMUM
OPERATION
Observe the following precautions to ensure the system operates
properly.
■Adjust the air outlet properly and avoid direct air flow to room
inhabitants.
■Adjust the room temperature properly for a comfortable
environment. Avoid excessive heating or cooling.
■Prevent direct sunlight from entering a room during cooling
operation by using curtains or blinds.
■Ventilate often.
Extended use requires special attention to ventilation.
■Keep doors and windows closed. If the doors and windows
remain open, air will flow out of your room causing a decrease in
the cooling or heating effect.
■Be careful not to cool or heat too much. To save energy, keep
the temperature setting at a moderate level.
■Never place objects near the air inlet or the air outlet of the unit.
It may cause deterioration in the effect or stop the operation.
■Turn off the main power supply switch to the unit when the unit is
not used for longer periods of time. If the switch is on, it uses
electricity. Before restarting the unit, turn on the main power
supply switch 6 hours before operation to ensure smooth
running. (Refer to "Maintenance" in the indoor unit manual.)
■When the display shows (time to clean the air filter), ask a
qualified service person to clean the filters. (Refer to
"Maintenance" in the indoor unit manual.)
■Keep the indoor unit and remote control at least 1 m away from
televisions, radios, stereos, and other similar equipment.
Failing to do so may cause static or distorted pictures.
■Do not place items under the indoor unit which may be damaged
by water.
Condensation may form if the humidity is above 80% or if the
drain outlet gets blocked.
9. MAINTENANCE
9.1. Maintenance after a long stop period (e.g. at the
beginning of the season)
■Check and remove everything that might be blocking inlet and
outlet vents of indoor units and outdoor units.
■Clean air filters and casings of indoor units. Refer to the
operation manual supplied with the indoor units for details on
how to proceed and make sure to install cleaned air filters back
in the same position.
■Turn on the power at least 6 hours before operating the unit in
order to ensure smoother operation. As soon as the power is
turned on, the remote controller displays appear.
NOTE Contact your dealer in case of changing the
combination or setting of group control and two remote
controller control systems.
Recommended temperature setting
For cooling 26~28°C
For heating 20~24°C
Pay attention to the fan.
It is dangerous to inspect the unit while the fan is running.
Be sure to turn off the main switch and to remove the fuses
from the control circuit located in the outdoor unit.
Operation manual
6
U-5~18MX4 + U-8~16ME4 M + U-8~16ME4 + U-4~6ML5✽
Urban Multi air conditioner
4PW40727-1A
9.2. Maintenance before a long stop period (e.g. at
the end of the season)
■Let the indoor units run in fan only operation for about half a day
in order to dry the interior of the units. Refer to "7.1. Cooling,
heating, fan only, and automatic operation" on page 3 for details
on fan only operation.
■Turn off the power. The remote controller displays disappear.
■Clean air filters and casings of indoor units. Refer to the
operation manual supplied with the indoor units for details on
how to proceed and make sure to install cleaned air filters back
in the same position.
10. F OLLOWING SYMPTOMS ARE NOT AIR
CONDITIONER TROUBLES
Symptom 1: The system does not operate
■The air conditioner does not start immediately after the ON/OFF
button on the remote controller is pushed.
If the operation lamp lights, the system is in normal condition.
To prevent overloading of the compressor motor, the air
conditioner starts 5 minutes after it is turned ON again in case it
was turned OFF just before. The same starting delay occurs
after the operation mode selector button was used.
■If "Centralized Control" is displayed on the remote control and
pressing the operation button causes the display to blink for a
few seconds.
This indicates that the central device is controlling the unit.
The blinking display indicates that the remote control cannot be
used.
■The system does not start immediately after the power supply is
turned on.
Wait one minute until the micro computer is prepared for
operation.
Symptom 2: Cool/Heat cannot be changed over
■When the display shows " " (change-over under
centralized control), it shows that this is a slave remote
controller.
■When the cool/heat changeover remote control switch is
installed and the display shows " " (change-over under
centralized control).
This is because cool/heat changeover is controlled by the cool/
heat changeover remote control switch. Ask your dealer where
the remote control switch is installed.
Symptom 3: Fan operation is possible, but cooling and heating do not
work.
■Immediately after the power is turned on.
The micro computer is getting ready to operate. Wait 10
minutes.
Symptom 4: The fan strength does not correspond to the setting.
■The fan strength does no change even if the fan strength
adjustment button in pressed.
During heating operation, when the room temperature reaches
the set temperature, the outdoor unit goes off and the indoor unit
changes to whisper fan strength.
This is to prevent cold air blowing directly on occupants of the
room.
The fan strength will not change even if the button is changed,
when another indoor unit is in heating operation.
Symptom 5: The fan direction does not correspond to the setting
■The fan direction does not correspond to the remote control
display. The fan direction does not swing.
This is because the unit is being controlled by the micro
computer.
Symptom 6: White mist comes out of a unit
Symptom 6.1: Indoor unit
■When humidity is high during cooling operation
If the interior of an indoor unit is extremely contaminated, the
temperature distribution inside a room becomes uneven. It is
necessary to clean the interior of the indoor unit. Ask your dealer
for details on cleaning the unit. This operation requires a
qualified service person.
■Immediately after the cooling operation stops and if the room
temperature and humidity are low.
This is because warm refrigerant gas flows back into the indoor
unit and generates steam.
Symptom 6.2: Indoor unit, outdoor unit
■When the system is changed over to heating operation after
defrost operation
Moisture generated by defrost becomes steam and is
exhausted.
Symptom 7: The remote controller display reads "U4" or "U5" and stops,
but then restarts after a few minutes
■This is because the remote control is intercepting noise from
electric appliances other than the air conditioner. This prevents
communication between the units, causing them to stop.
Operation automatically restarts when the noise ceases.
Symptom 8: Noise of air conditioners
Symptom 8.1: Indoor unit
■A "zeen" sound is heard immediately after the power supply is
turned on.
The electronic expansion valve inside an indoor unit starts
working and makes the noise. Its volume will reduce in about
one minute.
■A continuous low "shah" sound is heard when the system is in
cooling operation or at a stop
When the drain pump (optional accessories) is in operation, this
noise is heard.
■A "pishi-pishi" squeaking sound is heard when the system stops
after heating operation.
Expansion and contraction of plastic parts caused by
temperature change make this noise.
■A low "sah", "choro-choro" sound is heard while the indoor unit
is stopped.
When the other indoor unit is in operation, this noise is heard. In
order to prevent oil and refrigerant from remaining in the system,
a small amount of refrigerant is kept flowing.
Symptom 8.2: Indoor unit, outdoor unit
■A continuous low hissing sound is heard when the system is in
cooling or defrost operation.
This is the sound of refrigerant gas flowing through both indoor
and outdoor units.
■A hissing sound which is heard at the start or immediately after
stopping operation or defrost operation.
This is the noise of refrigerant caused by flow stop or flow
change.
Symptom 8.3: Outdoor unit
■When the tone of operating noise changes.
This noise is caused by the change of frequency.
Symptom 9: Dust comes out of the unit
■When the unit is used for the first time in a long time.
This is because dust has gotten into the unit.
Symptom 10: The units can give off odours
■The unit can absorb the smell of rooms, furniture, cigarettes,
etc., and then emit it again.
Symptom 11: The outdoor unit fan does not spin.
■During operation.
The speed of the fan is controlled in order to optimize product
operation.

Produkt Specifikationer

Mærke: Panasonic
Kategori: Klimaanlæg
Model: U-4ML5

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