Bosch MC4W15-1D User manual

6720874427(2017/04)ZA
Installation manual
MC4W15-1D
MC4W22-1D
MC4W28-1D
MC4W36-1D
MC4W45-1D
Thank you very much for purchasing our air conditioner.
Before using your air conditioner, please read this manual carefully and keep it for future reference.
Climate 5000 VRF
4 Way Compact Cassette Type Indoor Unit
MC4W Series - DC Fan Motor

2 |NOTES
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

1. PRECAUTIONS
■Ensure when installing National Regulations are complied with.
Failure to do so, could cause damage or injury.
■Read "PRECAUTIONS" carefully before installation.
■The following precautions include important safety items.
■Keep this manual with the owner's manual for future reference.
The safety precautions listed here are divided into two categories. In
either case, important safety information is listed which must be read
carefully prior to installing or servicing.
WARNING
Failure to observe a warning may result in injury.
CAUTION
Failure to observe a caution may result in injury or damage to
the equipment.
After completing the installation, make sure that the unit operates
properly during the start-up operation. Please instruct the customer
on how to operate the unit and keep it maintained.Also, inform cus-
tomers that they should store this installation manual along with the
owner's manual for future reference.
WARNING
Only trained and qualified service personnel to install,
repair or service the equipment.
Incorrect installation, repair, and maintenance may result in
electric shocks, short-circuit, leaks, fire or other damage to
the equipment.
CONTENTS PAGE Install according to this installation instructions only.
If the installation is defective, it will cause water leakage, electrical
shock and fire.
When installing the unit in a small room, take measures against to
stop refrigerant concentration from exceeding allowable safety
limits in the event of refrigerant leakage.
Contact your installer immediately should this happen. Excessive
refrigerant in a closed ambient can lead to oxygen deficiency.
Use the enclosed parts and specified parts for installation,
Failure to do so could cause the set to fall, water leakage, electrical
shock fire.
If the wall is not sufficient to hold the units weight, this could cause
the unit to drop and result in injury.
The appliance must be installed 2.3m above the floor.
The appliance shall not be installed in the laundry.
Before obtaining access to electrics, all supply circuits must be
disconnected.
For electrical work, follow the local national a separate electrical,
regulation and this installation manual. An independent circuit and
single outlet must be used.
If the electrical circuit capacity is not enough or defect in electrical
work, it will cause an electrical shock and fire.
Only use the specified cable and ensure the cable is connect tightly
and clamp the cable so that no external force will be acted on the
terminal.
If the connection or fixing is not perfect, it will cause heat-up or fire at
the connection.
Wiring routing must be properly arranged so that control board
cover is fixed properly.
If control board cover is not fixed perfectly, it will cause heat-up at
connection point of terminal, possibly causing a fire or electrical shock.
If the supply cord is damaged, it must be replaced by the
manufacture or its sevice agent or a similarly qualified person in
order to avoid a hazard.
An all-pole disconnection swith having a contact separation of at
least 3mm in all poles should be connected in fixed wiring.
When carrying out piping connection, take care not to let air
substances go into refrigeration cycle.
Otherwise, it will cause lower capacity, abnormal high pressure in the
refrigeration cycle, explosion and injury.
Do not modify the length of the power supply cable or use of
extension cable, and do not share the single outlet with other
electrical appliances.
Otherwise, it will cause fire or electrical shock.
The temperture of refrigerant circuit will be high, please keep the
interconnection cable away from the copper tube.
1. PRECAUTIONS .................................3
2. INSTALLATION INFORMATION ....................4
3. INSPECTING AND HANDLING THE UNIT ............4
4. ATTACHED FITTINGS ............................5
5. INDOOR UNIT INSTALLATION.....................6
6. INSTALL THE CONNECTING PIPE ..................8
7. REFRIGERANT PIPE CONNECTION ................9
8. CONNECT THE DRAIN PIPE.......................10
9. WIRING........................................11
10. CONTROL......................................12
11. TROUBLE SHOOTING ............................13
12. TEST OPERATION ...............................13
4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
PRECAUTIONS |3

Only carry out work on the unit in suitable weather conditions.
Improper installation work may result in the equipment falling
and causing accidents.
If the refrigerant leaks during installation, ventilate the
area immediately.
Toxic gas may be produced if the refrigerant comes into
contact with a naked flame.
After completing the installation work, check that the
refrigerant does not leak.
Toxic gas may be produced if the refrigerant leaks into the
room and comes into contact with a naked flame, such as a
fan heater, stove or cooker.
CAUTION
Ground the air conditioner.
Do not connect the ground cable to gas or water
pipes,lightning rod or a telephone ground cable. Incomplete
grounding may result in electric shocks.
Be sure to install an earth leakage breaker.
Failure to install an earth leakage breaker may result in
electric shocks.
Connect the outdoor unit cables, then connect the
indoor unit wires.
You are not allowed to connect the air conditioner with the
power source until wiring and refrigeration to the air condi-
tioner is complete.
While following the instructions in this installation
manual, install drain piping in order to ensure proper
drainage and insulate piping in order to prevent conden-
sation.
Improper drain piping may result in water leakage and
property damage.
Install the indoor and outdoor units, power supply cables
and connecting cables at least 1m away from televisions
or radios in order to prevent image interference or noise.
Depending on the radio waves, a distance of 1 metre may
not be sufficient enough to eliminate the noise.
The appliance is not intended for use by young children
or infirm persons without supervision.
Don't install the air conditioner in the following loca-
tions:
■There is petrolatum existing.
■Salty environment i.e (near the coast).
■There is caustic gas (the sulfide, for example) existing
in the air.
■The Volt vibrates violently (in the factories).
■In kitchens where it is full of oil gas.
■There is strong electromagnetic wave existing.
■There are inflammable materials or gas.
■There is acid or alkaline liquid evaporating.
■Other special conditions.
2. INSTALLATION INFORMATION
To install properly, please read this "installation manual" first.
The air conditioner must be installed by qualified persons.
When installing the indoor unit or its tubing, please follow this
manual as strictly as possible.
If the air conditioner is installed on a metal part of the building, it
must be electrically insulated according to the relevant standards
to electrical appliances.
When all the installation work is finished, please turn on the
power only after a thorough check.
INSTALLATION ORDER
■Select the location;
■Install the indoor unit;
■Install the outdoor unit;
■Install the connecting pipe ;
■Connect the drain pipe;
■Wiring;
■Test operation.
3. INSPECTING AND HANDLING THE UNIT
At delivery, the package should be checked and any damage should be
reported immediately to the supplier.
When handling the unit, take into account the following:
1. Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor
damage.
2. Ensure when handling the units, you take care not to damage
them. Use the existing packaging to cover the units when
installing.
3. Ensure you us correct lifting equipment, to avoid damage to the
units and injury.
4 |INSTALLATION INFORMATION
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

Fig.4-1
4. ATTACHED FITTINGS
Please check whether the following fittings were supplied with the unit. There maybe some surplus fittings left over.
NAME SHAPE Four-way
Cassette
Four-way Cassette
(compact)
INSTALLATION FITTINGS 1. Installation paper board 1 1
Tubing & Fittings 2. Soundproof / insulation
sheath 2 2
Drainpipe Fittings
3. Out-let pipe pipe 1 1
4. Out-let pipe sheath 1 1
5. Out-let pipe clasp 5 5
6.Tightening band 1 1
Remote controller & Its
Frame
7. Remote controller 1 1
8. Frame 2 2
9. Mounting screw
(ST2.9×10-C-H) 2 2
10. Alkaline dry batteries
(AM4) 1 1
Others
11. Installation manual This manual 1 1
12. Remote controller manual 1 1
13. Signal line 1 1
14. Connective pipe for restric-
tion assembly 1 1
15.Copper nut (Use for pipe
connection of engineering
installation)
1 1
Cautions on remote controller installation:
■Do not damage the controller.
■Before installation, operate the remote controller to determine its location in a reception
range.
■Keep the remote controller at least 1m apart from the nearest TV set or stereo equipment.
(it is necessary to prevent image disturbances or noise interferences.)
■Do not install the remote controller in a place exposed to direct sunlight or close to a
heating source, such as a stove.
■Insert the batteries in the correct order.
■This manual is subject to changes due to technological improvement without further
notices.
Remote
controller
Remote contr
oller
holder
Mounting screw B
ST2.9x10-C-H
TESER
NOREMIT
FFOREMIT
KCOLC
GNIWS
NOIT
C
ER
I
D
R
I
A
KO
OCE
GNIWS
EDOM NAF
DEEPS
OTUA
LOOC
YRD
TAEH
NAF
PMET
TES
KCOLC
TES
RUOH
DEEPSNAF
K
C
OL
H/C
Mounting screw B
ST2.9x10-C-H
Remote controller
holder
Remote
controller
4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
ATTACHED FITTINGS |5

5. INDOOR UNIT INSTALLATION
5.1. Installation place
(Refer to Fig.5-1, Fig.5-2, Fig.5-3 for specification.)
The indoor unit should be installed in a location that meets the
following requirements:
•There is enough room for installation and maintenance.
•The ceiling is horizontal, and its is suitable to withstand the
weight of the indoor unit.
•The outlet and the inlet are not impeded, and the influence of
external air is reduced.
•Ensure air flow can reach throughout the room.
•The connecting pipe and drainpipe could be extracted out easily.
•There is no direct radiation from heaters.
•Do not install the unit in salty atmosphere.
•If this cannot be avoided your model may need protection which
is anti corrosive.
CAUTION
Keep indoor unit, outdoor unit, power supply wiring and
transmission wiring at least 1metre away from televisions
and radios. This is to prevent image interference and noise
in those electrical appliances. (Noise may be generated
depending on the conditions under which the electric wave
is generated, even if 1metre is kept.).
•Install the unit at a site with sufficient strength to supporting the
weight of the unit.
•Insufficient supporting strength could potentially allow the unit to
fall would fall-down and cause human physical injury.
•Failure installation could cause the unit to fall-down.
5.2. Install the main body
■The existing ceiling (to be horizontal)
1. Please cut a quadrangular hole of 600x600mm in the ceiling
according to the shape of the installation paper board. (Refer to
Fig.5-3, Fig.5-4)
• The center of the hole should be at the same position of that of
the air conditioner body.
• Determine the lengths and outlets of the connecting pipe,
drainpipe and cables.
• Ensure the ceiling is flat for installation this will reduce vibration.
2. Please select the position of installation hooks according to the
hook holes on the installation board.
• Drill four holes of ⌀12mm, 45~50mm deep at the selected
positions on the ceiling. Then fix the expansible hooks (fittings).
• Face the concave side of the installation hooks toward the
expansible hooks. Determine the length of the installation
hooks from the height of the ceiling, then cut off the unneces-
sary part.
• If the ceiling is extremely high, please determine the length of
the installation hook according to material type.
• Use appropriate hooks to fit to the roof material.
• The length could be calculated from Refer to Fig.5-5:
• Length=210+L(in general, L is half of the whole length of the
installation hook)
3. Please adjust the hexangular nuts on the four installation hooks
evenly, to ensure the balance of the body.
• If the drainpipe is awry, leakage will be caused by the malfunc-
tion of the water-level switch.
• Adjust the position to ensure the gaps between the body and
the four sides of ceiling are even. The body's lower part should
sink into the ceiling for 10~12 mm (Refer to Fig.5-5).
• Use the transparent hose filled with water to check the lever
of the main body from the four sides or diagonal line direction,
the lever indicator also can check the lever from four sides of
the main body .(Refer to Fig.5-6)
• Locate the air conditioner firmly by wrenching the nuts after
having adjusted the body's position well.
■New built houses and ceilings
1. In the case of new built house, the hook can be embedded in
advance (refer to the A.b mentioned above). But it should be
strong enough to bear the indoor unit and will not become loose
because of concrete shrinking.
2. After installing the body, please fasten the installation paper
board onto the air conditioner with bolts(M6X16) to determine
in advance the sizes and positions of the hole opening on ceiling.
(Refer to Fig.5-8)
• Please first guarantee the flatness and horizontal of the ceiling
when installing it.
• Refer to the A.a mentioned above for others.
3. Refer to the A.c mentioned above for installation.
4. Remove the installation paper board.
CAUTION
After installing the body, the four bolts(M6x12)must
be fastened to the air conditioner to ensure the body is
secured.
Fig.5-1
Fig.5-2
082A
Necessary room
Ground
OutletOutlet
0032>
Inlet
0001>
>1000
>1000
0001>
Outlet
Ground
Necessary room
Outlet Inlet
6 |INDOOR UNIT INSTALLATION
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

NOTE
All the pictures in this manual are for explanation purpose
only. They may be slightly different from the air conditioner
you purchased (Dependant on model).The actual shape
shall prevail.
5.3. Install The Panel
CAUTION
Never put the panel face down on the floor or against
the wall, or on sharp objects.
This unit is made from plastic and care should be taken
when moving it.
1. Remove the air-in grill.
■Slide two grill switches towards the middle at the same time, and
then pull them down. (Refer to Fig.5-9)
■Position the grill up to an angle of about 45, and remove it. (Refer
to Fig.5-10)
Fig.5-9
Grid switch
Fig.5-10
45
2. Install the panel
■Align the swing motor on the panel to the tubing joints of the body
properly. ( Refer to Fig.5-11)
■Hang the four fixed rope of the main body to the installation cover
and the other three covers of the swing motor: (Refer to Fig.5-
11and )
CAUTION
The installation cover of the swing motor must sit into
the corresponding water receiver.
Installation paper board
Fig.5-3
Fig.5-4
Fig.5-5
Fig.5-6
Fig.5-7
Fig.5-8
A
L
21-01
671
43
A
062
600
50
60
Drain side
545 (Hook-location)
570 (Body)
570 (Body)
647 (Panel)
Body
Body
Nut
Ceiling
Ceiling
Colourless
transparent pipe
Body Central hole
Fixing hole
installation paper board
Screw M5x16
(Accessory)
Hook hole
Horizontal indicator
H (ceiling height)
Panel
Hook
647 (Panel)
523 (Hook-location)
(Unit: mm)
4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
INDOOR UNIT INSTALLATION |7

■Install the panel on the main body with bolt (M5×16) and washer.
(Refer to Fig.5-11 )
■Adjust the four panel hook screws to keep the panel horizontal,
and screw them up to the ceiling evenly.
■Fit the panel in the direction of the arrow in Fig.5-11slightly to
fit the panel’s centre to the centre of the ceiling’s opening. Ensure
that hooks of four corners are fixed well.
■Keep fastening the screws under the panel hooks, until the
thickness of the sponge between the body and the panel’s outlet
has been reduced to about 4~6mm. The edge of the panel should
contact with the ceiling well. (Refer to Fig.5-12)
• Malfunction described in Fig.5-13 can be caused by inappro-
priate tightness of the screw.
• If the gap between the panel and ceiling still exists after fasten-
ing the screws, the height of the indoor unit should be modified
again. (Refer to Fig.5-14-left)
• You can modify the height of the indoor unit through the open-
ings on the panel’s four corners, if the lift of the indoor unit and
the drainpipe is not influenced (Refer to Fig.5-14-right).
3. Hang the air-in grill to the panel, then connect the lead
terminator of the swing motor and that of the control box with
corresponding terminators on the body respectively.
4. Relocate the air-in grid in the procedure of reversed order,
install the air-in grid.
Swing motor installation cover
1
2
3
Cover
Steel rope
1
2
3
4
3
Fig.5-11
Please operate according
to the direction of the
arrow, or it can not be
disassembled when it is
necessary.
Steel rope
Cover
Swing motor side
Bolt, washer
Drain side
Swing motor installation cover
Body
Panel foam2 Ceiling
Panel foam
Air plate
Panel Panel foam1
Panel sealing foam
Inlet air
Outlet air
Fig.5-12
Body
Ceiling Panel foam2
Panel foam
Panel foam1
Panel
Outlet air Air plate
Inlet air Panel sealing foam
Ceiling Leakage
Dew
Fig.5-13
Ceiling Leakage
Condensation
Hexagon nut
Ceiling
Horizontal adjust ment
Fig.5-14 Ceiling
Hexagon nut
Horizontal adjust ment
6. INSTALL THE CONNECTING PIPE
■Check whether the height drop between the indoor unit and
outdoor unit, the length of refrigerant pipe, and the number of
the bends meet the following requirements:
• The max height drop and The length of refrigerant pipe
deponding on the ouotdoor unit.(If the height drop is more
than 10m, you had better put the outdoor unit over above the
indoor unit.)
• The number bends fewer than 15
• Do not let air, dust, or other impurities fall in the pipe system
during the time of installation.
• The connecting pipe should not be installed until the indoor
and outdoor units have been fixed already.
• Keep the connecting pipe dry, and do not let moisture in during
installation.
■The Procedure of Connecting Pipes
Measure the necessary length of the connecting pipe, using the
following process.
• Connect the indoor unit at first, then the outdoor unit.
Bend the pipe using a pipe bender careful not to damage
thepipe.
Cover the surfaces of the flare pipe and the joint nuts with oil,
and tighten it with 3~4 turns with hands before fasten the flare
nuts. (Refer to Fig.6-1)
Be sure to use two wrenches simultaneously when you connect
or disconnect the pipes.
■Notices for flexible pipe.
• The bending angle should not exceed 90°C.
• The larger the better it is.
• Do not bend the pipe more than three times.
■Bend the connecting pipe of small wall thickness.
• Cut out a desired concave at the bending part of the insulating
pipe.
• Then expose the pipe(cover it with tapes after bending).
• To prevent collapsing of deforming, please bend the pipe at its
biggest radius.
• Use a pipe bender.
■Use insulation material to cover the pipes. (More than 9mm thick).
8 |INSTALL THE CONNECTING PIPE
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

Use frozen oil
Bend the pipe with thumb
Make
the ends
straight
Use frozen oil
Bend the pipe with thumb
Make the ends
straight
Fig.6-1
Fig.6-2
Use oil
Make the ends
straight
■Pipe Containment and Brackets.
• Ensure when installing pipe brackets and containment, you use
appropriate materials which comply with national regulations.
Failure to do so may result in damage or injury.
• Cover the connecting pipe and the cables together tightly
with tapes. Do not let air in, which will cause water leakage by
condensation.
• Pass the bound connecting pipe through the wall conduit from
outside. Be careful of the pipe location to do no damage to the
tubing.
7. REFRIGERANT PIPE CONNECTION
7.1. Expel The Air
■Flaring
• Cut a pipe with a pipe cutter.
• Insert a flare nut into a pipe and flare the pipe.
90
Lean crude bur
r
Lean crude burr
Fig.7-1
Fig.7-2
R0.4~0.8
45°±2
90°±4
A
Table.7-1
Outside diameter
A(mm)
Max Min
Ø6.4mm 8.7 8.3
Ø9.5mm 12.4 12.0
Ø12.7mm 15.8 15.4
Ø15.9mm 19.0 18.6
Ø19.1mm 23.3 22.9
■Fasten the nut
• Put the connecting tubing at the proper position, tighten the
nuts with hands then fasten it with a wrench. (Refer to Fig.7-3)
• Too large a torque will harm the bellmouthing and too small
will cause leakage. Please determine the torque according to
Table.7-2.
Fig.7-3
Table.7-2
Tubing size Torque
Ø6.4mm 14.2~17.2N.m
Ø9.5mm 32.7~39.9N.m
Ø12.7mm 49.5~60.3N.m
Ø15.9mm 61.8~75.4N.m
Ø19.1mm 97.2~118.6N.m
• For pressure testing and vacuum testing, refer to outdoor
installation manual.
4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
REFRIGERANT PIPE CONNECTION |9

7.2. Check The Leakage
■Check all the joints with the leak detector or soap water. (See
Fig.7-6 as a reference illustration)
Fig.7-6
BA
DC
A......Lo-stop valve B......Hi-stop valve
C,D..Joints of the connecting pipe to the indoor unit.
A......Lo-stop valve B......Hi-stop valve
C,D..Joints of the connecting pipe to the indoor unit.
Check-point of indoor unit
Check-point of outdoor unit
7.3. Insulation
■Ensure insulating materials cover all the exposed parts of the
flare pipe joints and refrigerant pipe on the liquid-side and the
gas-side. Ensure that there is no gap between them.
■Incomplete insulation may cause water condensation.
8. CONNECT THE DRAIN PIPE
8.1. Install The Drainpipe Of The Indoor Unit
1. The drainpipe can use PVC pipe (external diameter about 37~
39mm, inner diameter is 32mm).
2. Joint drainpipe connector to the end side of water pump pipe,
and fix drainpipe together with water outflow pipe and thermal
insulation tube by clasp of water outflow pipe (attached).
CAUTION
Don't use forcing strength to crack the water-pumping pipe.
3) Water-pump pipe and drainpipe from main body must be
wrapped by insulation tube evenly, and bound and tighten band
for obstructing air getting in and coagulation.
4) Prevent water back flowing into unit inside during shutdown,
thedrain pipe shall be placed down side and drain water to
outdoor (drain side), the gradient of the drain pipe should be
higher than (1/100), this is important as otherwise water will
remain. (Refer to Fig.8-1 a)
5) When connecting drainpipe, do not drag the pipe this would pull
the main unit. For this, please arrange clamp points every 0.8 to
1.0metre to avoid pipe be bended (See Fig.8-1 b).
6) When extending a drainpipe, apply protective tube to wrap its
indoor parts for ensuring the lengthen part connected tightly.
7) If the drainpipe is higher than the pump, the pipework but be fitted
vertically , additional pipework will be required. The height of the
drainpipe must be no more 600mm near the defrost pan so as not
to allow an over flow. (Refer to Fig.8-2).
CAUTION
The joints in drain system must be sealed to avoid water leakage.
8) The height from floor to the end of drainpipe or the bottom of
drain end must not be more than 50 mm. Do not immerse the
end of drainpipe or the bottom of drain end into water. When
draining condensate liquid to a drain, please bend the drainpipe
to a U-sharped hydroseal for avoiding smells coming back by
drainpipe to indoors.
0.8~1.0m
a
>1.0m
b
Gradient:
higher than 1/100
bFig.8-1
Gradient:
higher than 1/100
10 |CONNECT THE DRAIN PIPE
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

<200mm
Lean over 1/10
0
Pump-pipe clasp
(the fittings)
0.8-1.0m
Max. 600mm
Fig.8-2
Pump-pipe clamp (the fittings)
< 200mm
Max. 600mm
Gradient
over 1/100
8.2. Drainage Test
■Check whether the drainpipe is blocked.
■New built house should have this test done before having the
ceiling completed.
1. Remove the test cover, and store water of about 2000ml to the
water receiver through the tube.
2. Turn on the power, and operate the air conditioner under the
"COOLING" mode. Listen to the sound of the drain pump.
Check whether the water is discharged well (a lag of 1min is al-
lowed before discharging, according to the length of the drain
pipe), and check whether water leaksfrom the joints.
CAUTIONS: If there is any malfunction, please resolve it im-
mediately.
3. Stop the air conditioner for three minutes, check if everything
is ok. If the drain hose is located incorrectly, water overflow will
cause the Alarm indicator lamp to flash (For both cooling and
heating mode or cooling only mode), even the water leak out
from the water receiver.
4. Check the drain pump whether drain water immediately when
alarm sound for the high water lever. If the water level does
not come down below to the maximum water level, the air
conditioner will stop. Restart it by turning off the power and
drain off all the water.
■Thedrain plug isusedtoemptythewater-receiverformaintenance
of the air conditioner. Please ensure the plug is in-position at all
times during operation to avoid leakage.
9. WIRING
■Caution
• The air conditioner should use separate power supply with
rated voltage, the voltage of power supply must be with-
in90%~110% of rated value.
• The external power supply to the air conditioner should have
ground wiring, which is linked to the ground wiring of the
indoor and outdoor unit.
• Electrical connections should be done by qualified personnel
according to circuit drawing.
• A disconnection device having an air gap contact separation in
all active conductors should in corporated in the fixed wiring
according to the National wiring regulation.
• Ensure to locate the power cable and the signal cable are
separated apart to avoid cross-disturbance and their contact
with connecting pipe or stop valve body.
• The cabling attached to this air conditioner is 6m long. Only
use the same type of cable for extensions of the cable length.
Do not twist two wires together unless the joint is soldered well
and covered with insulator tape.
• Do not turn on the power until you have checked carefully after
wiring.
• The yellow and green wire can only be used to link to the
ground wiring.
■The Specification of Power.
Table.9-1
Model(KW) 1.5KW – 5.6KW
Power Phase 1-Phase
Frequency and volt 220-240~50Hz/60Hz
Circuit breaker/fuse (A) 16/16
Indoor unit power wiring (mm2)3×2.5
Indoor/outdoor connecting
wiring(mm2) (weak electric signal)
3-core shielded wire
3×0.75mm2
CAUTION
■A disconnection device having an air gap contact separation in
all active conductors should be incorporated in the fixed wiring
according to the National Wiring Regulation.
■Ground the air conditioner properly to obtain a good anti-
interference effect .
■Wiring Diagram
4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
WIRING |11

Wiring chart
CE NTRAL CONTROL
MONITOR(CCM)
OUTDOOR UNIT
COMPUTER
INDO ORUNIT
INDO ORUNIT
INDO ORUNIT
Power (220-240V ~ 50Hz)
(208-230V ~ 60Hz)
The reserved function
is indicated in broken
line table, users can
select it when
necessary
3-core shielded wire Fig.9-1
Power (220-240V ~ 50Hz)
(208-230V ~ 60Hz)
INDOOR
UNIT
INDOOR
UNIT
INDOOR
UNIT
OUTDOOR
UNIT
COMPUTER
3-core shielded wire
The reset function is
indicated in broken line
table, users can select
it when necessary
CENTRAL
CONTROL
MONITOR (CCM)
NOTE
■Please note environment around you which could impact on the
units performance. (environmental temperature, direct sunlight,
rain etc.)
■Only use the recommended size of cable for installation;
■Connect the grounded wire to both indoor and outdoor units.
■Terminal board diagram
Please refer to the indoor unit wiring diagram.
NOTE
The air-conditioner can be connected with Central Control Monitor
(CCM). Before operation, ensure the unit is correctly wired along
with set system address and network address of indoor units.
Fig.9-2
Y/G
LN
XT1
TO INDOOR POWER
220-240V~50Hz/60Hz
208-230V~60Hz
TO INDOOR POWER
220-240V~50Hz/60Hz
Fig.9-3
WHITE
BLUE
BLACK
PQ
XYE
YELLOW
GRAY
TO OUTDOOR
COMM. BUS
To
Central Control Monitor
(CCM)COMM. BU
S
XT2
Please use 3-core shielded wire
BLACK
E
To Central Control Monitor
(CCM)COMM. BUS
TO OUTDOOR
COMM. BUS
Please use 3-core shielded wire
WHITE BLUE BLACK
YELLOW GRAY BLACK
Fig.9-4
Display
board
Wire
controller
To wire controller
The reserved wire control
function is indicated in broken
table, user can purchase the
wire controller when necessary.
DISPLAY
BOARD
WIRE
CONTROLLER
The reserved cable control function is
indicated in broken table, user can purchase
the wired controller when necessary.
TO WIRE CONTROLLER
10. CONTROL
■Horsepwer set
Hoursepower code
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
ENC1
POWE R_S
CAPACITY CODE
POWER_S
Depending on the requirements of the installation various setting
the switch cords on PC panel of indoor electrical control box. Once
finished the setting, please switch off the main power, and then switch
on power again, otherwise, setting function could not work.
ENC1 Dial switch Capacity setting
Note: The horsepower
has been set before
leaving the factory,
which can only be
modified by profes-
sionals.
Code Capacity(Horsepower)
F 1.5KW–1.7KW
0 2.2KW
1 2.8KW
2 3.6KW
3 4.5KW
4 5.6KW
CAUTION
Total system units can be 64units(0-63), each unit has its own
address code. If two addresses have the same code in one system,
a malfunction operation will occur.
Please switch off the power before setting,otherwise an error will
occur.
■Network address set
• Network address is set by communication of indoor and
outdoor unit; the address is the same as indoor address, there
is no need to set separately.
• The central control of indoor units can be done on outdoor
unit, there is no need to control indoor unit separately, for
details please refer to outdoor unit manual.
• For previous control of indoor units, the network can be set by
connecting (X,Y,E) terminals, there is no need to set network
address. The network can also be set by outer network module
and main board (CN20).
12 |CONTROL
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

11. TROUBLE SHOOTING
Table.11-1
NO. Type Contents LED Lamp
flash Remarks
1Malfun-
ction
The evaporator
sensor check point
is abnomal or
room temp. sensor
is abnormal.
The run lamp
flashes fast
After the malfunctions
disappear, it restores
automatically.
2Malfun-
ction
Indoor/outdoor
unit communica-
tion is abnormal
The timer
lamp flashes
fast
After the malfunctions
disappear, it restores
automatically.
3Malfun-
ction
Outdoor unit is
abnormal
The alarm
lamp flashes
slowly
After the malfunctions
disappear, it restores
automatically.
4Malfun-
ction
Water level switch
is abnormal
The alarm
lamp flashes
fast
After the malfunctions
disappear, it restores
automatically.
5 Alarm Mode conflict
The defrost
lamp flashes
fast
When the indoor unit
turns to heating mode
or is turned off, the
alarm will disappear.
6 Alarm Fan Protection
The timer
lamp flashes
slowly
After the malfunctions
disappear, it restores
automatically.
7Malfun-
ction EEPROM error Defrost LED
flash slowly
After the malfunctions
disappear, it restores
automatically.
8 Alarm No address
Timer LED
and run
LED flash
togather
After the malfunctions
disappear, it restores
automatically.
12. TEST OPERATION
■The test operation must be carried out after the entire installation
has been completed.
■Please confirm the following points before the test operation:
• The indoor unit and outdoor unit are installed properly.
• Pipework and wiring are correctly installed.
• The refrigerant pipe system is leakage-checked.
• The drainage is not blocked .
• The heating insulation works well.
• The ground wiring is connected correctly.
• The length of the refrigeration pipe work and the added capac-
ity of the refrigerant have been recorded.
• The power voltage fits the rated voltage of the air conditioner.
• There is no blockages at the outlet and inlet of the outdoor and
indoor and indoor units.
• The gas-side and liquid-side stop values are both opened.
• The air conditioner is pre-heated by turning on the power.
■Test operation
Set the air conditioner under the mode of “COOLING”with
the remote controller, and check the following points per the
“Owner's Manual”If there is any malfunction, please resolve it as
per chapter “Troubles And Causes ”.
• The indoor unit
Whether the switch on the remote controller works well.
Whether the buttons on the remote controller works well.
Whether the air flow louver moves normally.
Whether the room temperature is adjusted well.
Whether the indicator lights normally.
Whether the temporary buttons works well.
Whether the drainage is normal.
Whether there is vibration or abnormal noise during operation.
Whether the air conditioner heats well in the case of the HEAT-
ING/COOLING mode.
• The outdoor unit
Whether there is vibration or abnormal noise during operation.
Whether the generated wind, noise, or condensed of by the air
conditioner have influenced your neighborhood.
Whether any of the refrigerant is leaked.
CAUTION
Protection function will delay the startup of compressor for 3min-
utes in case the unit is turned on immediately after power on or
restarted after shutdown.
4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
TROUBLE SHOOTING |13

14 |NOTES
6720874427(2017/04)
4 Way Compact Cassette Type Indoor Unit

4 Way Compact Cassette Type Indoor Unit
6720874427(2017/04)
NOTES |15

Robert Bosch (Pty) Ltd.,
15th Road, Randjespark
1685 Midrand
SOUTH AFRICA