System air SYSVRF2 User manual

SYSVRF2CASSETTE MINI
Cassette 600x600 VRF indoor unit
INSTALLATION MANUAL
GB

1
Comply with local, national and international laws and
regulations.
Read "PRECAUTIONS" carefully before installation.
The following precautions include important safety items.
Strictly follow them.
Keep this manual with the owner's manual in a handy place
for future reference.
1. PRECAUTIONS
WARNING
The safety precautions listed here are divided into two categories.
Read both carefully.
After completing the installation, ensure that the unit operates
properly during start-up. Please instruct the customer on how to
operate the unit and keep it well maintained. Inform customers that
they should store this installation manual and the owner's manual for
future reference.
Only trained and qualified service personnel can install,
repair or service the equipment.
Improper installation, repair, and maintenance may result in
electric shocks, short-circuit, leaks, fire or other damage to the
equipment.
Strictly perform installation according to these installation
instructions.
Faulty installation may cause water leaks, electric shocks and fires.
When installing the unit in a small room, take measures
against the refrigerant from exceeding allowable safety
limits in the event of refrigerant leaks. Contact the place of
purchase for more information. Excessive refrigerant in a closed
ambient environment can lead to oxygen deficiency.
Failure to observe a warning may result in death.
Failure to observe a caution may result in injury or damage
to the equipment.
CONTENTS PAGE Only use the attached accessories parts and specified
parts for installation.
Otherwise, it will cause the unit to fall and may also cause water
leaks, electrics shocks, or fire.
Install in a strong location which that can bear the unit' s
weight.
If the location is not strong enough or if installation is not
properly done, the unit may fall and cause injury.
The unit must be installed 2300mm above the floor.
The unit must not be installed in a laundry room.
Before obtaining access to terminals, all supply circuits
must be disconnected.
The unit must be positioned where the plug is accessible.
The enclosure of the unit must be marked by words or
symbols to show direction of the refrigerant flow.
Electrical work should comply with relevant national and local
standard, regulations, and this manual . An independent
circuit and single outlet must be used.
If electrical circuit capacity is not sufficient or defective, electrics
shock or fire may result.
Use the specified wire, connect it tightly and clamp it, so
that no external force will be acted on the terminal.
If connection or fixing is imperfect, over-heating or a fire at the
connection point may occur.
Wiring routing must be properly arranged so that the
control board cover is fixed properly.
If the control board cover is fixed imperfectly, it may cause
overheating at the connection point of the terminal, a fire, or
electric shocks.
If the power wire is damaged, it must be replaced by the
manufacture or its service agent or a similarly qualified
person to avoid a hazard.
A disconnection switch must be installed on all poles as
fixed wiring with a contact separation of at least 3mm in all
poles.
When carrying out piping connection, do not to let air go
into the refrigeration piping system.
Otherwise, it will lower capacity and may cause abnormally high
pressure in the refrigeration cycle, an explosion, and injury.
Do not modify the length of the power supply wire or use
the extension wire. Do not share the single outlet with
other electrical appliances.
Otherwise, it may cause a fire or electric shocks.
The temperature of the refrigerant circuit will be high. Keep
the interconnection wire away from the copper pipe.
The unit must be installed in accordance with national
wiring regulations.
A disconnection switch must be installed on all poles as
fixed wiring with a contact separation of at least 3mm. A
residual current device (RCD) with a rating above 10 mA
must be incorporated in the fixed wiring according to national
regulations.
Thepower cord type designation is H05RN-R/H07RN-F or
above.
CAUTION
WARNING
PRECAUTIONS........................................................................................1
INSTALLATION INFORMATION................................................................2
INSPECTING AND HANDLING THE UNIT.................................................2
ATTACHED FITTINGS..............................................................................3
INDOOR UNIT INSTALLATION.................................................................4
INSTALL THE CONNECTION PIPE...........................................................8
REFRIGERANT PIPE CONNECTION..........................................................8
CONNECT THE DRAINAGE PIPE............................................................10
ELECTRICAL CONNECTION...................................................................11
CONTROL OPERATION........................................................................13
TEST OPERATION.................................................................................15

2
To install the unit properly, please read this Installation
Manual.
The air conditioner must be installed by qualified personnel.
When installing the indoor unit or its piping, 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 for electrical appliances.
When all the installation work is completed, please turn on
the power only after it has been thoroughly checked.
Notice will not be given regarding any changes to this
manual due to product improvements.
2. INSTALLATION INFORMATION
INSTALLATION ORDER
Select the location;
Install the indoor unit;
Install the outdoor unit;
Install the connecti
Connect the drainage pipe;
Wiring;
Test operation.
Ground the air conditioner.
Do not connect the grounding wire to any pipes, lightning
rods or telephone grounding wires. 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’s wires, then connect the
indoor unit’s wires.
Do not connect the air conditioner to the power supply until
installation (including wiring and piping) is completed.
Follow the instructions in this installation manual, and
install drain piping to ensure proper drainage and
insulation to prevent condensation.
Improper drainage piping may result in water leakage and
property damage.
Power wiring and communication wiring of indoor units
and outdoor units should be at least 1 meter away from
TVs and radios to prevent interference or noise.
The required distance should be larger if the intensity of radio
waves is higher.
The unit is not intended for use by young children or
infirm persons without supervision.
Do not install the air conditioner in the following locations:
Where there are strong electromagnetic waves.
Where there are flammable materials or gases.
Where acid or alkaline liquid evaporates.
Avoid narrow spaces that are sensitive to noise.
Other special conditions.
Consider environmental factors, such as typhoons and
earthquakes, during installation.
Improper installation may result in the equipment falling.
If refrigerant leakage occurs, ventilate the area immediately.
Toxic gas may be produced if the refrigerant comes into
contact with fire.
After completing installation, ensure that the refrigerant
does not leak.
Toxic gas may be produced if the refrigerant leaks into the
room and comes into contact with a source of fire such as a
fan heater, stove or cooker.
CAUTION
3. INSPECTING AND HANDLING THE UNIT
At delivery, the package should be checked and any damage should
be reported immediately to the service agent.
When handling the unit, take into account the following:
Fragile, handle the unit with care.
Keep the unit upright to avoid compressor damage.
Choose the path along which the unit is to be brought in advance.
Move this unit in its original packaging as far as possible.
When lifting the unit, always use protectors to prevent belt damage
and pay attention to the position of the unit’s center of gravity.
1
2
3
4
Young children should be supervised to ensure that they
do not play with the appliance.
The appliance is not intended for use by young children
or the elderly without supervision.
Where a large amount of lubricant oil such as petrolatum
is used.
Where high salinity in the air exists, e.g., in coastal areas.
Where there is caustic gas (e.g., sulfide) in the air
(near a hot spring).
Where there are strong vibrations (in factories).
In buses or cabinets.
Where oil vapor is produced, e.g., kitchen

3
4. ATTACHED FITTINGS
Please check whether all the following fittings have been included. If there are spare fittings, please store them carefully.
Table 4-1
This manual
Four-way
Cassette (compact)
Installation Fittings
Tubing & Fittings
Drainage pipe Fittings
Others
Shape
Name
2. Soundproof / insulation sheath
5. Outlet pipe clasp
6.Tightening band
4. Outlet pipe sheath
3. Flexible hose tube
7. Installation manual
9. Weak electric cable group
1. Installation paper board 1
2
1
1
5
1
1
10. Copper nut (Used for pipe
connecting in installation)
1
1
13.Tightening band
1
2
8
12.PVC sleeve Φ20
11.PVC sleeve Φ30

4
Keep the indoor unit, outdoor unit, power supply wire, and
transmission wire at least 1000 mm away from televisions
and radios. This is to prevent image interference and noise.
(Noise may be generated depending on the conditions under
which the electric wave is generated, even if 1000 mm
distance is maintained.)
5. INDOOR UNIT INSTALLATION
5.1 Installation place
(Refer to Fig.5-1, Fig.5-2, Fig.5-3 for specifications.)
The indoor unit should be installed in a location that
meets the following requirements:
5.2 Install the main body
Cute a quadrangular hole 600×600 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 in the same position the air
conditioner body’s center.
Determine the lengths and outlets of the connection pipe,
drainage pipe and wires.
To balance the ceiling and to avoid vibrations, strengthen the
ceiling if necessary.
Adjust the hexangular nuts on the four installation hooks
evenly to ensure the body is balanced.
If the drainage pipe is faulty, leaks may be caused by a
malfunction 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 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 can check the lever from the four sides of
the main body. (Refer to Fig.5-6)
Locate the air conditioner firmly by tightening the nuts after
adjusting the body's position well.
Select the position of installation hooks according to the hook
holes on the installation board.
Drill four holes of Ø 12mm, 45-50mm deep at the selected
positions on the ceiling. Then embed 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 ceiling. Then cut off the
unnecessary part.
If the ceiling is extremely high, determine the length of the
installation hook according to facts.
Cut the installation hook open in the middle position, then
use an appropriate length of reinforcing rods (Ø12mm) to
weld it together.
The length can be calculated from (Refer to Fig.5-4):
Length=210 mm+L (In general, L is 30-40mm)
A
B
C
1
2
3
4
Newly built houses and ceilings
In the case of a newly built house, the hook can be embedded
in advance (Refer to point B mentioned above). But it should
be strong enough to bear the indoor unit and not become
loose because the concrete has shrunk.
After installing the body, fasten the installation paper board
onto the air conditioner with bolts (M5X20) to pre-determine
the sizes and positions of the hole opening on ceiling. (Refer
to Fig.5-8)
Refer to point C mentioned above for installation.
Remove the installation paper board.
Please guarantee the horizontal flatness of the ceiling when
installing it
Refer to point A mentioned above for others.
After installing the body, the four bolts (M6x12) must be
fastened to the air conditioner to ensure the body is
grounded well.
CAUTION CAUTION
The existing ceiling (to be horizontal)
Not suitable for narrow spaces or areas that are sensitive
to noise.
Ensure that there is enough room for installation and
maintenance.
Ensure the ceiling is horizontal, and its structure can bear
the weight of the indoor unit after cutting any holes or
performing other installation-related work.
The outlet and the inlet must not be impeded and there
must be minimal influence from the outside air.
The air flow extends throughout the room.
The connection pipe and drainage pipe can be extracted
easily.
There is no direct radiation from heaters.
Do not install it in a place where the air contains a lot of
salt. If this can't be avoided, choose an anticorrosive
model.
Reserve a maintenance hole for subsequent maintenance
When installing the unit, leave a maintenance hole beside the
electronic control box in the ceiling in advance for maintenance.
Its dimensions and position are shown in Fig.5-1.
The hole should be sealed by a cover or other decorative materials.
Ensure the cover of the hole can be disassembled when the indoor
unit needs maintenance.
Fig.5-2
Fig.5-1
A
Necessary room for installation. Unit: mm
Ground
OutletOutlet Inlet
>
Electronic control box Maintenance hole
ceiling
647(Panel)
150～200
Electronic control box
Centerline of the
maintenance hole
(should be in the
same position as
the centerline of
the indoor unit)
400～500
1000
>
1000
>
1000
400～500
>
1000
647(Panel)
2300
280

5
Fig.5-3
Fig.5-4
Fig.5-7
Fig.5-8
Fig.5-9
Fig.5-10
All illustrations in this manual are for reference only.
They may be slightly different from the air conditioner
you purchased (depend on model). The actual shape
should be followed.
NOTE
45
5.3 Install The Panel
Remove the air inlet grid.
Never put the panel face down on floor or against the wall,
or on irregularly shaped objects.
Never drop or strike it.
Slide two grid switches towards the middle at the same time,
and then pull them up. (Refer to Fig.5-9)
Lift the grid up to an angle of about 45 , and remove it.
(Refer to Fig.5-10)
1
CAUTION
Grid switch
Install the panel on the main body with bolts (M5×20) and
washers. (Refer to Fig.5-11 )
Adjust the four panel hook screws to keep the panel horizontal.
Screw them into the ceiling evenly.
Adjust the panel in the direction of the arrow in Fig.5-11
slightly to fit the panel's center to the center of the ceiling's
opening. Guarantee that the hooks of the four corners are
fixed well.
The installation cover of the swing motor must sink into
the corresponding water pan.
Install the panel
Align the swing motor on the panel to the tubing joints of the body.
(Refer to Fig.5-11)
Hang the two fixed ropes of the main body to the installation
cover and the other cover of the swing motor: (Refer to
Fig.5-11 and )
2
CAUTION
523(Hook-location)
570(Body)
647(Panel)
Drainage side
Unit: mm
545(Hook-location)
570(Body)
Fig.5-5
A
60
647(Panel)
280
L
≥20
Ceiling
Panel
Hook
Nut
Body
)thgiehgniliec(H
600
270
50
Ceiling
Body
10-12
60
L=30～40
630(Body,include Electrical Box)
260
Liquid Pipe
Φ6.35(OD)
Gas Pipe
Φ12.7(OD)
Drainage Pipe
Φ25(OD)
30
167
Central hole
Hook hole
Installation paper board
Body
Fixing hole
Fig.5-6
Screws M5x20
(Accessory for the panel)
Colorless
trans parent pipe Horizontal
indicator
Unit:mm

6
Fig.5-13
Fig.5-12
Keep fastening the screws under the panel hooks until the
thickness of sealing sponges 1&2 between the body and
the panel's outlet has been reduced to about 4-6mm. The
edge of the panel should touch the ceiling well. (Refer to
Fig.5-12)
3
4
The fault described in Fig.5-13 can be caused if screws
are not tightly fastened
If the gap between the panel and ceiling still exists after
fastening the screws, the height of the indoor unit should
be adjusted. (Refer to Fig.5-14-left)
Modify the height of the indoor unit through the openings
on the panel's four corners, if lifting the indoor unit and the
drainage pipe is not influenced (Refer to Fig.5-14-right ).
Hang the air inlet grid on the panel. Then connect the
lead terminals for the swing motor and control box with
the corresponding terminals on the body.
Relocate the air inlet grid in the procedure in the reverse
order to install it.
Fig.5-14
Leakage
Dew
Swing motor installation cover
1
Hexagon nut
Ceiling
Horizontal adjustment
condensed water
Gaps are
not allowed
Ceiling
Body
Ceiling
Air plate
Panel
Panel foam 2
Panel sealing
sponge 1
Inlet air
Outlet air
Panel foam 1
Panel sealing
sponge 2
Panel sealing sponge 3
Steel rope
Drainage side
Swing motor side
Bolt, washer
Note: Please operate
according to the direction of
the arrow,or it can not be
disassembled when it is
necessary.
Steel rope
2
3
4
Guard of wire
(Protrusion 20mm)
Fig.5-11

7
Sleeve
5Panel Installation Instruction
Tighten belt
5.1 Fix the panel to the indoor unit and open the grill, as shown below.
5.2 Put the indoor unit display board wiring and stepper
motor wiring into the sleeve.
5.3 Connect the wiring between the indoor unit and the panel.
5.4 Move the sleeve to the middle of the wirings and
use the tighten belt to tie the sleeve ends tightly.
Cut off the extra parts of the tighten belt.
Sketch map of the sleeve bandage:

8
Connect the indoor unit before the outdoor unit.
Bend the tubing the correct way. Do not damage them.
Coat the surfaces of the flare pipe and the joint nuts with frozen
oil, and turn them for 3-4 rounds with your hands before using a
wrench. (Refer to Fig.6-1)
Use two wrenches simultaneously when you connect or
disconnect the pipes.
The stop valve of the outdoor unit should be fully closed (as per
the original state). Every time you connect the pipes, first loosen
the nuts at the stop valve. Then connect the flare pipe (within in
5 minutes). If the nuts have been loose for a long time, dusts and
other impurities may enter the pipe system and may cause a
malfunction. Expel the air out of the pipe with refrigerant before
connection.
Expel the air (refer to "Expel The Air") after connecting the
refrigerant pipe to the indoor and outdoor units. Then fasten the
nuts at the repair points.
Note for Bendable Pipes.
The bending angle should not exceed 90°C
The bending position is preferably for the bendable pipe. Larger
is better.
Do not bend the pipe more than three times.
Bend the connection pipe that has a thin surface.
Cut out a desired concave at the bending part of the insulating
pipe.
Then expose the pipe (cover it with tape after bending).
To prevent collapsing or deformation. Bend the pipe at its widest
radius.
Use a bender on low radius pipes.
Use a normal brass pipe.
Use the same insulating materials for the brass pipe. (More than
9 mm thick).
●
●
●
●
●
●
●
●
●
③
●
①
②
6. INSTALL THE CONNECTION PIPE
Check whether the height drop between the indoor unit and
outdoor unit, the length of the refrigerant pipe, and the number
of the bends meet the following requirements:
The max height drop and length of refrigerant pipe depend on
the outdoor unit. (If the height drop is more than 10000 mm
position the outdoor unit above the indoor unit.)
The number of bends must be fewer than 15.
Do not let air, dust, or other impurities enter the pipe system
during installation.
The connection pipe should not be installed until the indoor and
outdoor units have been fixed.
Keep the connection pipe dry, and do not let moisture in during
installation.
The Procedure of Connecting Pipes
Measure the necessary length of the connection pipe, and install
it as follows.
●
●
●
●
●
7. REFRIGERANT PIPE CONNECTION
7.1 Expel The Air
Locate The Pipe
Drill a hole in the wall (suitable just for the size of the wall conduit,
90 mm in general), then set the fittings such as the wall conduit
and its cover.
Bind the connection pipe and the wires together tightly with binding
tape. Do not let air in to avoid leaks due to condensation.
Pass the bound connection pipe through the wall conduit from
outside. Be careful of the pipe at all locations and do not damage
the tubing.
Connect the pipes.
Then, open the stem of the stop valves of the outdoor unit to
ensure regular flow in the refrigerant pipe that connects the indoor
and outdoor units.
Check for leaks with a leak detector or soapy water.
Cover the joint of the connection pipe to the indoor unit with the
sound proof/insulation sheath (fittings), and bind it well with the
tape to prevent leaks.
●
●
●
●
●
Flaring
Cut a pipe with a pipe cutter.
Insert a flare nut into a pipe and flare the pipe.
Fig.7-1
Fig.6-1
Use frozen oil
Bend the pipe with your thumb
Use the method for unlocking
the coil to straighten the pipe
Fig.6-3
Fig.6-2
90
Lean crude burr

9
Fig.7-2
R0.4~0.8
45°±2
90 °
±4
A
●
●
Fasten the nut
Put the connection piping at the correct position, fasten the
nuts with your hand before using a wrench. (Refer to
Fig.7-3 )
Too large torque will harm the bell-mouthing and too small will
cause a leak. Determine the torque according to
Table.7-2.
Outside diameter
A(mm)
Max
8.7Φ6.4mm
Φ9.5mm
Φ12.7mm
Φ15.9mm
Φ19.1mm
12.4
15.8
19.0
23.3
8.3
12.0
15.4
18.6
22.9
Min
Table.7-1
Fig.7-3
●
●
●
●
●
●
The necessary filling amount of refrigerant
The refrigerant volume to be added is calculated according to
outdoor unit installation manual. Add refrigerant by measuring
it on a scale. L: The length of the pipe
Please record the quantity added and store it carefully for future
maintenance.
Expel the air with a vacuum pump (Refer to
Fig.7-4 )(Please
refer to its manual for how to use the manifold valve)
Loosen and remove the maintenance nuts of stop valves A and
B, and connect the charge hose of the manifold valve with the
maintenance terminals of stop valve A. (Ensure that stop valves
A and B are both closed)
Connect the joint of the charge hose to the vacuum pump.
Completely open the Lo-lever of the manifold valve.
Turn on the vacuum pump. At the beginning of pumping, loosen
the maintenance terminal nut of stop valve B a little to check
whether air comes in. (The sound of the pump changes and
compound meter indicator goes below zero). Then fasten the
nut.
All the stop valves should be opened before testing. Each air
conditioner has two stop valves of different sizes on the side
of the outdoor unit, which operate as the Lo-stop value. (Refer
to
Fig.7-5 )
●
●
●
●
When the pumping has finished, completely close the Lo-lever
of the manifold valve and turn off the vacuum pump.
After pumping for at least 15 minutes, confirm that the
multimeter indicator is -1.0X105 Pa (-76 cmHg)
Loosen and remove the quadrangle cover on stop valves A and
B to open stop valve A and B completely. Then, fasten them.
Disassemble the charge hose from the repair-mouth of stop
valve A, and fasten the nut.
-76 cmHg
Lo-lever Hi-lever
Charge hose Charge hose
Vacuum pump
Lo-lever
Manifold valve
Multi-meter Pressure meter
Flare nut
Stopper
Cap
Valve body
Valve stem
Fig.7-4
Fig.7-5
Table. 7-2
TorqueTubing size
14.2~17.2 N.m (144~176 kgf.cm)
32.7~39.9 N.m (333~407 kgf.cm)
49.5~60.3 N.m (504~616 kgf.cm)
61.8~75.4 N.m (630~770 kgf.cm)
97.2~118.6 N.m (990~1210 kgf.cm)
Φ6.4 mm
Φ9.5 mm
Φ12.7mm
Φ15.9mm
Φ19.1mm

10
8. CONNECT THE DRAINAGE PIPE
8.1 Installing The Drainage pipe Of The Indoor Unit
Check all the joints with the leak detector or soapy water. (Refer
to Fig.7-6)
7.2 Check The Leakage
B A
DC
Check-point of indoor units
Check-point of the outdoor unit
A......Lo-stop valve B......Hi-stop valve
C, D. Joints of the connection pipe to the indoor unit.
Fig.7-6
Insulate all exposed parts of the flare pipe joints and refrigerant
pipe on the liquid side and gas side. Ensure that there is no gap
between them. (Refer to Fig.7-7)
Incomplete insulation may cause condensation.
7.3 Insulation
1) The drainage pipe can use PVC pipe. (External diameter 30-32 mm,
inner diameter 25 mm.)
2) Joint the drainage pipe connector to the end side of water pumping
pipe. Fix the drainage pipe to the insulation casing of the water outlet
pipe with the clasp from the water outlet pipe (attached).
CAUTION
Don’t force water-pumping pipe or you might crack it.
5) When connecting the drainage pipe, do not drag the pipe and
thus pull the main unit. To do so, arrange bearing points every 800
to 1000 mm to avoid bending the pipe (Refer to Fig.8-1 b).
6) When connecting a lengthened drainage pipe, apply protective
tube to wrap the indoor part to connect it tightly.
7) If the drainage pipe outlet is higher than the pumping connection
pipe of the main body, arrange the drainage pipe upwards vertically
using the connection assembly of the water outlet for vertical
bending. Set the height of the drainage pipe to the water pan
surface to no more than 600 mm to avoid excessive backflow and
overflow during shutdown. (Refer to Fig.8-2.)
8) Based on pipe bending requirements, use the connection
assembly for the water outlet in the terminal box for pipe layout.
3) The water-pumping pipe and drainage pipe from main body
must be wrapped evenly with an insulation sheath, and bound
by a tightening band for stopping air ingress and coagulation.
4) Prevent water backflow from getting inside the unit during
shutdown. Place the drainage pipe shall downwards and the
drain water to outdoors (the drainage side). The gradient of the
drainage pipe should be higher than (1/100) and free from
salient or water. (Refer to Fig.8-1 a)
CAUTION
The joints in the drainage system must be sealed to avoid water leaks.
9) The height from the floor to the end of drainage pipe or the
bottom of drainage slot must be more than 50 mm. Do not
immerse the end of drainage pipe or the bottom of drainage slot
into water. When draining condensed water to the raceway, bend
the drainage pipe into a U-shaped hydroseal to avoid transmitting
odor from the drainage pipe indoors.
Unit body
Subsidiary belt for the
thermal insulation pump
Field piping side
Cut top-down
Fig.7-7 a
bFig.8-1 b
Fig.8-2
800 ～1000mm
Gradient:
higher than
1/100
>1000mm
<200mm
Lean over
1/100
Pump-pipe clasp
(the fittings)
Max. 600mm
800 ～1000mm

11
Terminal Board Diagram follow as Fig.9-1
Fig.9-1
9.2 power wire connection
The indoor unit and outdoor unit should use separate power
supplies, independent leakage protectors and an all-pole
disconnection device.
Indoor units connecting to the same outdoor unit should use
a uniform power supply, leakage protection devices and
all-pole disconnection device.
POWER IN
The power supply specifications are as follows. See table 9-1&9-2.
If the capacity of the wire is too low, the wire may overheat and the
machine my burn out.
9.3 Power Supply Specification
2200~4500Model(W)
5A/250VAC
Power
Phase
Fuse on board
1-Phase
220-240V~ 50/60Hz
V olt and frequency
RVVSP 2*AWG16-AWG20
RVVSP 2*AWG16-AWG20
T able 9-1
Indoor/outdoor connecting wire
(Communication wire)
Indoor/wired controller
connecting wire
(Communication wire)
Indoor unit
L1 L2
Fuse
220-240V~50Hz
Power supply
L1 L2
Breakers with
current leakage
Switch (breakers for
wiring and over current
protection)
Pull box
Pull box Pull box
Indoor unitIndoor unitIndoor unit
All-pole disconnection
device with leakage
protector
Fig.9-2
L N
Check the drainage pump for draining water immediately
when the alarm sounds for a high water level. If the water level
cannot come back to below the limit, the air conditioner will stop.
Restart it until turn off the power and drain all the water.
Stop the air conditioner for three minutes and check that
everything is normal. If the drainage hose is poorly located,
water overflow will cause the alarm indicator lamp to flash (for
both cooling and heating or cooling only) and water may leak
from the water pan.
Turn on the power. Then, run the air conditioner in "COOLING"
mode. Listen to the sound of the drainage pump. Check whether
the water discharges well (a lag of 1 min is allowed before
discharging, according to the length of the drainage pipe), and
check whether water leaks from the joints.
8.2 Drainage Test
Check that the drainage pipe is unhindered
Newly built house should be tested before decorating the
ceiling.
1. Remove the test cover, and stow 2000 ml of water to the
water pan through the stow tube.
2.
CAUTIONS: If there is a fault, resolve it immediately.
3.
4.
5. Turn off the power and drain the water away.
The drainage plug is used to empty the water pan for maintenance
of the air conditioner. Fix it in position at all times when running to
avoid leaks.
The power wire type designation is H05RN-R / H07RN-F or above.
9. ElECTRICAL CONNECTION
CAUTION
9.1 Electrical wiring
The power supply of indoor unit must within normal voltage range.
External wiring of the indoor unit must be grounded, so the power
wire of the outdoor unit must be reliably connected to the external
grounding wire.
Before completing the wiring, an all-pole disconnection device
must be installed.
Electrical wiring must be performed by an electrician according
to the wiring label.
Install the electrical leakage device according to national
regulations.
Arrange power wires and communication wires so they do not
interfere with each other. Connection pipes and valves should
not come into contact.
When all electrical wiring is completed, power on the unit after
confirming that all wires are connected correctly and fixed tightly.
Select an appropriate connection wire according to specification
requirements. Do not parallel connect two wires, unless the
welding joint is well welded and wrapped with insulating tape.
Every pole of the all-pole disconnection device should have at
least 3 mm separation distance. Install a leakage protector with
a rating above 10 mA when completing the wiring.
Before connecting the wire, switch off the power. Otherwise it
may cause electric shocks.
220-240V~ 50Hz
220-240V~ 50/60Hz

12
Thickness of main power wire, switch capacities
indoor unit
Total capacity
of Indoor units
< 10A or
singel unit
Minimum wire thickness
(mm2[AWG])
Main Power Wire Ground wire
Switch(A)
Capacity Fuse
Breaker
for wiring
(A)
Breaker for current leakage
1.3[16] 15 15 15A 10mA 0.1sec. or less
2.0[14] 15 15 15A 10mA 0.1sec. or less
3.3[12] 20 20
15A~10A
20A~15A
30A~20A 5.2[10]
40A~30A
50A~40A
8.3[8]
13.3[6]
30
40
50
15
20
30
40
50
15
30
40
50
1.3[16]
2.0[14]
3.3[12]
5.2[10]
8.3[8]
13.3[6]
20A 10mA 0.1sec. or less
30A 10mA 0.1sec. or less
40A 10mA 0.1sec. or less
50A 10mA 0.1sec. or less
Table 9-2
NOTE : The chart shown is only for reference. Installation must conform with local regulations.
Fig.9-3
Use copper core PVC insulated sheathed shielding twisted cord
(RVVSP) as communication wire for optimum communication.
Do not wire or plug in terminal blocks with electricity.
Communication between the indoor unit and outdoor unit uses
RS485 communication. The interface is "P, Q, E". (Refer to Fig. 9-3)
The shielding layer of the communication wire for indoor unit and
wired controller should be connected by hand. Finally, it will be
grounded at a single point.
The shielding layer of the communication wire for the indoor unit
and outdoor unit should be connected by hand and then ground
at the outdoor unit side at a single point.
Complete wiring as per the wiring diagram.
Communication wires must not form a closed loop.
Do not tie communication wires, refrigerant pipe and power cable
together when the communication wires are parallel to the power
wire.
A distance of more than 51 mm should be maintained, to prevent
communication interference.
Use insulated rubber tape to bind bare copper wire to prevent
communication failures caused by short circuit.
9.4 Communication Wire Connection
To outdoor/intdoor
unit communication
To wired
controller
comm. bus
P Q E X1 X2

13
P Q E X Y
X Y
Outdoor unit Centralized controller
L1
L3
L5
L3
L3
Indoor unit 1#
Indoor unit 2#
Indoor unit 4#
Maximun wiring length
L1+L3≤1200 m , L5≤1200 m
CAUTION
The system can connect 64 indoor units (0-63). Each requires a
unique system address. If two indoor units in the same system have
the same address, a fault will occur.
Indoor unit 3#
Example of communication wiring of the
heat pump system
P Q E X1 X2 P Q E X1 X2 P Q E X1 X2 P Q E X1 X2
Fig.9-4
10. CONTROL OPERATION
4500W
2200W
2800W
3600W
0
1
2
3
ENC1
Toggle
Switch
Code
Set horsepower
Capacity(Horsepoewr)
Base on different purposes to setting the switch cords on PC panel
of indoor electrical control box. Once finish the setting, please cut
off the main power, and then input power again, otherwise, setting
function could not work.
10.1 Hoursepower
Hoursepower code
ENC1
PO WE R_S
Note: The horsepower has
been set before the unit
leaves the factory It can
only be modifie by
maintenance personnel.
There are maximum 64 indoor units in one refrigerant
system,and each of them should occupy one unique
address, from 0 to 63. Repeated indoor address will result
in error.
Please switch off the power before configuring settings,or an
error may occur.
CAUTION
10.2 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.
●
1 2
Table.10-1

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10.4 ERROR CODE
Error Code Error Content
FE
Eb
E0
E1
E2
E3
E4
E7
Ed
EE
Error of electronic expansion valve
Mode conflict
Error with the indoor temp. sensor (T1)
Error with the pipe temp. sensor (T2)
Error with the pipe temp. sensor (T2B)
DC FAN error
EEPROM error
Outdoor unit error
Water level alarm
No address when first power on
Table.10-2
E6
H0
M-Home not matched error(Reserved)
Reserved
E5
Communication error of indoor and
outdoor units
10.3 Main board Code designation
SW1definition
SW1
ON
0 means the cooling mode temperature
compensation is 0°C (default)
1 means the cooling mode temperature
compensation is 2°C
0 means EXV positions 96 (steps) in
standby heating mode (default)
1 means EXV positions 72 (steps) in
standby heating mode
SW1
ON
1 2
1 2
0/1 Definition
ON
Means 0
ON
Means 1
SW2 definition
Reserved
(Default 0)
Reserved (default 0)
SW3 definition
0 means auto addressing mode
(default)
1 means clear indoor unit address
SW2
ON
1 2
SW2
ON
1 2
SW3
ON
1 2
SW3
ON
1 2
SW4 definition
SW5 definition
00 means the time for stopping the
TERMAL fan is 4 minutes (default)
01 means the time for stopping
TERMAL fan is 8 minutes
10 means the time for stopping
TERMAL fan is 12 minutes
11 means the time for stopping
TERMAL fan is 16 minutes
00 means shutting down the unit
to "stop cold air" at 15℃(default)
01 means shutting down the unit
to "stop cold air" at 20℃
10 means shutting down the unit
to "stop cold air" at 24℃
11 means shutting down the unit
to "stop cold air" at 26℃
SW4
ON
1 2
SW4
ON
1 2
SW4
ON
1 2
SW4
ON
1 2
SW5
ON
1 2
SW5
ON
1 2
SW5
ON
1 2
SW5
ON
SW6 definition
SW7 definition
Reserved (default 0)
Reserved (default 0)
J1 definition
Without jumper "J1" for the auto
restart function
With jumper "J1" for the non-auto
restart function
00 means the temp. compensation
value is 6°C in heat mode (default)
01 means the temp. compensation
value is 2°C in heat mode
10 means the temp. compensation
value is 4°C in heat mode
11 means temp. compensation
value is 0°C in heat mode
(follow me)
J1
J1
SW6
ON
1 2
SW6
ON
1 2
SW6
ON
1 2
SW6
ON
1 2
SW7
ON
1 2
SW7
ON
1 2
Reserved
(Default 0)

The outdoor unit
Whether there is vibration or abnormal noise during operation.
Whether the generated wind, noise, or water condensed by the
air conditioner have influenced your neighborhood.
Whether any of the refrigerant leaks.
●
11 . TEST OPERATION
The protection function will delay the startup of compressor for
3 minutes if the unit is turned on immediately after powering on
or restarting after shutting down.
CAUTION
Testing must be carried out after installation is completed.
Please confirm the following points before the test:
The indoor unit and outdoor unit are installed properly.
Piping and wiring are completed correctly.
The refrigerant pipe system has been checked for leaks.
Drainage is unimpeded.
The heating insulation works well.
The ground wiring is connected correctly.
The length of the piping and the amount of recharged
refrigerant have been recorded.
The power voltage fits the rated voltage of the air conditioner.
There is no obstacle at the air outlet and inlet of the outdoor
and indoor units.
The gas side and liquid side stop valves are both open.
Preheated the air conditioner by powering it on.
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According to the user’s requirements, install the remote
controller frame where the remote controller’s signal can
reach the indoor unit smoothly.
Test operation
Set the air conditioner in "COOLING" mode with the remote
controller. Then check the following points according to the
"Owner’s Manual". If there is an error, refer to "Troubles And
Causes" for a solution.
The indoor unit
Whether the switch on the remote controller works normally.
Whether the buttons on the remote controller works well.
Whether the air flow louver moves normally.
Whether the room temperature is well adjusted.
Whether the indicator lights normally.
Whether the Manual operation buttons work normally.
Whether drainage is normal.
Whether there is vibration or abnormal noise during operation.
Whether the air conditioner is heating properly in heat pump
type units.
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15

MD17I-016AW
16126000002987 V1.3