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Owner’s Manual
INVERTER ONE-TWIN/ONE-THREE/ONE-FOUR/ONE-FIVE SPLIT-TYPE AIR CONDITIONER
Climate 5000 MS
18/27/36/42 OU- OUE
IMPORTANT NOTE:
• Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference.
• This manual only describes outdoor units. When using an indoor unit, refer to the user’s manual of the indoor unit.
6720887258 (2018/04) GB
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Safety Precautions
Table of Content
1 Safety Precautions ............................................................ 2
2 Unit Parts and Major Functions ........................................... 3
2.1 Unit Parts ............................................................... 3
3 Manual Operations and Maintenance .................................. 7
4 Troubleshooting ................................................................ 8
4.1 Common Problems .................................................. 8
4.2 Troubleshooting Tips ................................................ 8
5 European Disposal Guidelines ............................................ 9
CAUTION
Risk of fire (for R32 refrigerant only).
1 Safety Precautions
Thank you for purchasing this air conditioner. This manual will provide
you with information on how to operate, maintain and troubleshoot
your air conditioner. Following the instructions will ensure the proper
function and extended lifespan of your unit.
Please pay attention to the following signs:
WARNING
Failure to observe a warning may result in serious injury. The
appliance must be installed in accordance with national regulations.
CAUTION
Failure to observe a caution may result in injury or equipment
damage.
WARNING
• Only Qualified Personnel to install this air conditioner. Inappropriate
installation may cause water leakage, electric shock or fire.
• The warranty will be voided if the unit is not installed by Qualified
Personnel.
• If an abnormal situation arises (like smell of burning), isolate the
power supply and call qualified personnel for instructions to avoid
electric shock, fire or injury.
• DO NOT let the indoor unit or the remote control get wet. This may
cause electric shock or fire.
• DO NOT insert fingers, rods or other objects into the air inlet or
outlet. This may cause injury, since the fan may be rotating at high
speeds.
• DO NOT use a flammable spray such as hair spray, lacquer or paint
near the unit. This may cause fire or combustion.
• Do not use means to accelerate the defrosting process or for clean-
ing, other than those recommended by the manufacturer.
• The appliance shall be stored so as to prevent mechanical damage
from occurring.
• Be aware that the refrigerants may not contain an odour.
• Compliance with F-gas regulations shall be observed.
• Keep ventilation openings clear of obstruction.
• DO NOT pierce or burn.
• The appliance shall be stored in a well-ventilated area where the
room size corresponds to the room area as specified for operation.
• Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an
industry-accredited assessment authority, which authorises their
competence to handle refrigerants safely in accordance with an
industry-recognised assessment specification.
• Servicing shall only be performed by Qualified Personnel. Main-
tenance and repair requiring the assistance of other Qualified
personnel shall be carried out under the supervision of the person
competent in the use of flammable refrigerants.
WARNING
Servicing shall only be performed as recommended by the equipment
manufacturer. Maintenance and repair requiring the assistance of other
qualified personnel shall be carried out under the supervision of the
person competent in the use of flammable refrigerants. For more details,
please refer to the Information on servicing in the INSTALLATION
MANUAL. (This is only required for units adopting R32 Refrigerant.)
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Unit Parts and Major Functions
CAUTION
• DO NOT touch the air outlet while the swing flap is in motion. Fin-
gers might get caught or the unit may break down.
• DO NOT inspect the unit by yourself. Ask qualified personnel to
perform the inspection.
• To prevent product deterioration, do not use the air conditioner for
preservation purposes (storage of food, plants, animals, works of
art, etc.).
• DO NOT touch the evaporator coils inside the indoor unit. The
evaporator coils are sharp and may cause injury.
• DO NOT operate the air conditioner with wet hands. It may cause
electric shock.
• DO NOT place items that might be affected by moisture damage
under the indoor unit. Condensation can occur at a relative humidity
of 80%.
• DO NOT expose heat-producing appliances to cold air or place them
under the indoor unit. This may cause incomplete combustion or
deformation of the unit due to the heat.
• After long periods of usage, check the indoor unit to see if anything
is damaged. If the indoor unit is damaged, it may fall and cause
injury.
• If the air conditioner is used together with other heating devices,
thoroughly ventilate the room to avoid oxygen deficiency.
• DO NOT climb onto or place objects on top of the outdoor unit.
• DO NOT operate the air conditioner when using fumigant insec-
ticides. The chemicals may become layered with the unit and
endanger those who are hypersensitive to chemicals.
• DO NOT let children play with the air conditioner.
• DO NOT operate the air conditioner in a wet room (e.g. bathroom
or laundry room). This can cause electrical shock and cause the
product to deteriorate.
2 Unit Parts and Major Functions
2.1 Unit Parts
Wall-mounted type
Air inle
t
One-five
Air outlet
One-four
One-three
One-twin
Air outlet
Fig. 1.
Indoor unit
1. Panel frame
2. Rear air intake grille
3. Front panel
4. Air purifying filter & Air filter (rear)
5. Horizontal louvre
6. LCD display window
7. Vertical louvre
8. Manual control button (rear)
9. Remote controller holder
Outdoor unit
10. Drain hose, refrigerant connecting pipe
11. Connective cable
12. Stop valve
13. Fan hood
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Unit Parts and Major Functions
Duct / Ceiling type
One-five
One-four
One-three
Floor and standing type (console)
One-five
One-four
One-three
One-twin
Fig. 2.
Indoor unit
1. Air outlet
2. Air inlet
3. Air filter
4. Electric control cabinet
5. Wire controller
Outdoor unit
6. Drain hose, refrigerant connecting pipe
7. Connective cable
8. Stop valve
9. Fan hood
One-twin
Fig. 3.
Indoor unit
1. Air flow louvre (at air outlet)
2. Air inlet (containing air filter)
3. Remote controller
4. Installation part
5. Display panel
Outdoor unit
6. Drain hose, refrigerant connecting pipe
7. Connective cable
8. Stop valve
9. Fan hood
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Unit Parts and Major Functions
Compact four-way cassette type
One-five
One-four
One-three
One-twin
NOTE:
For multi-split type air conditioners, one outdoor unit can be matched
to different types of indoor units. All of the pictures in this manual are
for demonstration purposes only. Your air conditioner may be slightly
different, even if similar in shape. The following pages introduce several
kinds of indoor units that can be matched with the outdoor units.
Operating Conditions
Use the system under the following temperatures for safe and effective
operation. If the air conditioner is used under different conditions, it
may malfunction or become less effi cient.
COOL mode HEAT mode DRY mode
Room
Temperature
Outdoor
Temperature
17°C - 32°C 0°C - 30°C 10°C - 32°C
0°C - 50°C -15°C - 30°C 0°C - 50°C
-15-50°C
(For models
with lowtemp. cooling
systems)
0°C - 60°C
(For special
tropical
models)
0°C - 60°C
(For special
tropical
models)
Fig. 4.
Indoor unit
1. Drain pump (drain water from indoor unit)
2. Drain hose
3. Air outlet
4. Air inlet
5. Air intake grille
6. Display panel
7. Remote controller
Outdoor unit
8. Refrigerant connecting pipe
9. Connective cable
10. Stop valve
11. Fan hood
Table 1.
Features
Protection of the air conditioner
Compressor protection
• The compressor cannot restart for 3 minutes after it stops.
Anti-cold air (Cooling and heating models only)
• The unit is designed not to blow cold air in HEAT mode, when the
indoor heat exchanger is in one of the following three situations and
the set temperature has not been reached:
a. When heating has just started.
b. During defrosting.
c. During low temperature heating.
• The indoor or outdoor fans stop running when defrosting (cooling
and heating models only).
Defrosting (cooling and heating models only)
• Frost may be generated on the outdoor unit during a heat cycle
when outdoor temperature is low and humidity is high resulting in
lower heating effi ciency in the air conditioner.
• Under these conditions, the air conditioner will stop heating opera-
tion and start defrosting automatically.
• The time to defrost may vary from 4 to 10 minutes, depending
the outdoor temperature and the amount of frost buildup on the
outdoor unit.
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Unit Parts and Major Functions
Auto-Restart (some models)
In case of power failure, the system will immediately stop. When power
returns, the operation light on the indoor unit will flash. To restart the
unit, press the ON/OFF button on the remote control. If the system has
an auto restart function, the unit will restart using the same settings.
White mist emerging from the indoor unit
• In COOL mode, a white mist may be generated due to a large
temperature difference between air inlet and air outlet in places with
high relative humidity.
• In HEAT mode, a white mist may be generated due to moisture
created in the defrosting process when the air conditioner restarts
after defrosting.
Noise coming from the air conditioner
• You may hear a low hissing sound when the compressor is running
or has just stopped running. This sound is the sound of the refrigerant flowing or coming to a stop.
• You may also hear a low “squeaking” sound when the compressor
is running or has just stopped running. This is caused by temporary
heat expansion and cold contraction of the plastic parts in the unit
when the temperature is changing.
• A noise may be heard due to the louvre restoring itself to its original
position when power is first turned on.
• DO NOT place objects near the air inlet and outlet of the unit. This
will reduce the efficiency of the unit.
• Set a timer and use the built-in SLEEP/ECONOMY mode if applica-
ble.
• If you don’t plan to use the unit for a long time, remove the batteries
from the remote control.
• Clean the air filter every two weeks. A dirty filter can reduce cooling
or heating efficiency.
• Adjust louvres properly and avoid direct airflow.
Dust blowing out from the indoor unit
This is happens when the air conditioner has not been used for a long
time or during its first use.
Smell emitted by the indoor unit
This caused by the indoor unit giving off smells from building materials,
furniture or smoke.
The air conditioner turns to FAN ONLY mode from COOL or HEAT
mode (for cooling and heating models only).
When the indoor temperature reaches the set temperature setting, the
compressor will stop automatically, and the air conditioner turns to FAN
only mode. The compressor will start again when the indoor temperature
rises in COOL mode or falls in HEAT mode to the set point.
Droplets of water may form on the surface of the indoor unit when
cooling occurs in relatively high humidity (defined as higher than 80%).
Adjust the horizontal louvre to the maximum air outlet position and
select HIGH fan speed.
Heating mode (for cooling and heating models only)
The air conditioner draws in heat from the outdoor unit and releases it via
the indoor unit during heating. When the outdoor temperature falls, heat
drawn in by the air conditioner decreases accordingly. At the same time,
the heat load of the air conditioner increases due to a larger difference
between indoor and outdoor temperature. If a comfortable temperature
cannot be achieved with the air conditioner alone, it is recommended
that you use a supplementary heating device.
Lightning or a wireless car telephone operating nearby may cause the
unit to malfunction. Disconnect the unit from its power source and then
re-connect the unit with the power source again. Push the ON/OFF
button on the remote controller to restart operation.
Closing curtains during heating also helps keep the heat in
Fig. 5.
Doors and windows should be kept closed
Fig. 6.
Energy Saving Tips
• DO NOT set the unit to excessive temperature levels.
• While cooling, close the curtains to avoid direct sunlight.
• Doors and windows should be kept closed to keep cool or warm air
in the room.
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Manual Operations and Maintenance
3 Manual Operations and Maintenance
Operation Mode Selection
When two or more indoor units are operating simultaneously, make
sure the modes do not conflict with each other. The heat mode claims
precedence over all other modes. If the unit intially started to operate
in HEAT mode, the other units can operate in HEAT mode only. For
example: If the unit intially started operating in COOL (or FAN) mode,
the other units can operate in any mode except HEAT mode. If one of the
units selects HEAT mode, the other operating units will:
• stop operation and display ”--” (for units with display window only)
or
• the auto and operation indication light will flash rapidly
• the defrost indication light will turn on
• the timer indication light will remain on (for units without a display
window).
Alternatively, the defrost and alarm indication light (if applicable) will
light up, or the operation indication light will flash rapidly, and the timer
indication light will turn off (for the floor and standing type).
Maintenance
If you plan to leave the unit idle for a long time, perform the following
tasks:
1. Clean the indoor unit and air filter.
2. Select FAN ONLY mode and let the indoor fan run for a time to dry
the inside of the unit.
3. Disconnect the power supply and remove the battery from the
remote control.
4. Check components of the outdoor unit periodically. Contact a local
dealer or a customer service centre if the unit requires servicing.
When the air conditioner is to be used again:
• Use a dry cloth to wipe off the dust accumulated on the rear air
intake grille in order to avoid the dust being dispersed from the
indoor unit.
• Check that the wiring is not broken or disconnected.
• Check that the air filter is installed.
• Check if the air outlet or inlet is blocked after the air conditioner has
not been used for a long time.
NOTE:
Before you clean the air conditioner, be sure to switch off the unit and
isolate the power supply.
Optimal Operation
To achieve optimal performance, please note the following:
• Adjust the direction of the air flow so that it is not blowing directly
on people.
• Adjust the temperature to achieve the highest possible level of
comfort. Do not adjust the unit to excessive temperature levels.
• Close doors and windows in COOL or HEAT mode.
• Use the TIMER ON button on the remote controller to select a time at
which you want to start your air conditioner.
• Do not place any object near the air inlet or air outlet, as the effi
ciency of the air conditioner may be reduced and the air conditioner
may stop running.
• Clean the air filter periodically, otherwise cooling or heating perfor-
mance may be reduced.
• Do not operate the unit with horizontal louvre in closed position.
Suggestion: For units that feature an electric heater, it is strongly
recommended that you keep the machine plugged in so as to ensure
smooth operation, when the outside ambient temperature is below
0°C.
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Troubleshooting
4 Troubleshooting
CAUTION
If one of the following conditions occurs, isolate the power supply
immediately and contact qualified personnel for further assistance.
• The operation light continues to flash rapidly after the unit has been
restarted.
• The remote control buttons do not work.
• The unit continually trips fuses or circuit breakers.
• A foreign object or water enters the air conditioner.
• Other abnormal situations.
4.1 Common Problems
The following symptoms are not a malfunction and in most situations will
not require repairs.
Problem Possible Causes
Unit does not turn
on when pressing
ON/ OFF button
The unit changes
from COOL mode
to FAN mode
The indoor unit
emits white mist
Both the indoor
and outdoor units
emit white mist
The indoor unit
makes noises
The unit has a 3-minute protection feature
that prevents the unit from overloading.
The unit cannot be restarted within three
minutes of being turned off.
Cooling and heating models: If the operation
light and PRE-DEF (Pre-heating/ Defrost)
indicators are lit up, the outdoor temperature is too cold and the unit’s anti-cold wind
is activated in order to defrost the unit.
In cooling-only models: If the “Fan Only”
indicator is lit up, the outdoor temperature is
too cold and the unit’s anti-freeze protection
is activated in order to defrost the unit.
The unit changes its setting to prevent frost
from forming on the unit. Once the temperature increases, the unit will start operating
again.
The set temperature has been reached, at
which point the unit turns off the compressor. The unit will resume operation when the
temperature fluctuates again.
In humid regions, a large temperature
difference between the room air and the
conditioned air can cause white mist.
When the unit restarts in HEAT mode after
defrosting, white mist may be emitted due
to moisture generated from the defrosting
process.
A squeaking sound is heard when the system
is OFF or in COOL mode. The noise is also
heard when the drain pump (optional) is in
operation.
A squeaking sound may occur after running
the unit in HEAT mode due to expansion and
contraction of the unit’s plastic parts.
Problem Possible Causes
Both the indoor
unit and outdoor
unit make noises
The outdoor unit
makes noises
Dust is emitted
from either the
indoor or the
outdoor unit
The unit emits a
bad odour
The fan of the
outdoor unit does
not operate
Table 2.
A low hissing sound may occur during
operation. This is normal and is caused by refrigerant gas flowing through both the indoor
and outdoor units.
A low hissing sound may be heard when the
system starts, has just stopped running or
is defrosting. This noise is normal and is
caused by the refrigerant gas stopping or
changing direction.
The unit will make different sounds based on
its current operating mode.
The unit may accumulate dust during
extended periods of non-use, which will be
emitted when the unit is turned on. This can
be mitigated by covering the unit during long
periods of inactivity.
The unit may absorb odors from the environment (such as furniture, cooking, cigarettes,
etc.) which will be emitted during operation.
The unit’s filters have become moldy and
should be cleaned.
During operation, the fan speed is controlled
to optimise product operation.
4.2 Troubleshooting Tips
When troubles occur, please check the following points before
contacting a repair company.
Problem Possible Causes Solution
The unit is
not working
Power failure Wait for the power to
be restored
The power switch is off Turn on the power
The fuse is blown Replace the fuse
Remote control batteries are dead
The unit’s 3-minute
protection has been
activated
Replace the remote
control batteries
Wait three minutes
after restarting the unit
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European Disposal Guidelines
Problem Possible Causes Solution
Poor cooling
performance
The unit
starts and
stops frequently
Poor heating
performance
Temperature setting
may be higher than
the ambient room
temperature
The heat exchanger on
the indoor or outdoor
unit is dirty
The air filter is dirty Remove the filter and
The air inlet or outlet of
either unit is blocked
Doors and windows
are open
Excessive heat is generated by sunlight
Low refrigerant charge
due to leak or longterm use
There’s too much or
too little refrigerant in
the system
There is air, incompressible gas or foreign
material in the refrigeration system.
System circuit is
blocked
The compressor is
broken
The voltage is too high
or too low
The outdoor temperature is lower than 7 °C
Cold air is entering
through doors and
windows
Low refrigerant due to
leak or long-term use
Lower the temperature
setting
Clean the affected heat
exchanger
clean it according
to instructions
Turn the unit off,
remove the obstruction
and turn it back on
Make sure that all
doors and windows are
closed while operating
the unit
Close windows and
curtains during periods
of high heat or bright
sunshine
Check for leaks, re-seal
if necessary and top off
refrigerant
Check for leaks and
recharge the system
with refrigerant
Evacuate and recharge
the system with
refrigerant
Determine which
circuit is blocked and
replace the malfunctioning piece of
equipment
Replace the compressor
Install a manostat to
regulate the voltage
Check for leaks and
recharge the system
with refrigerant
Make sure that all
doors and windows are
closed during use
Check for leaks, re-seal
if necessary and top off
refrigerant
5 European Disposal Guidelines
Users in European Countries may be required to properly dispose of this
unit. This appliance contains refrigerant and other potentially hazardous
materials. When disposing of this appliance, the law requires special
collection and treatment. DO NOT dispose of this product as household
waste or unsorted municipal waste.
When disposing of this appliance, you have the following options:
• Dispose of the appliance at a designated municipal electronic waste
collection facility.
NOTE:
Disposing of this appliance in the forest or other natural surroundings
endangers your health and is bad for the environment. Hazardous
substances may leak into the ground water and enter the food chain.
Table 3.
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Bosch Thermotechnology Ltd
Cotswold Way
Warndon
Worcester
WR4 9SW
mailto: Commercial.enquiry@uk.bosch.com
Contact Number 03301233004
Web address www.bosch-industrial.co.uk
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