Acson A5MSY18BR User manual

Inverter-Y Multi Split
A5MSY_(i)
A5MSY18BR
A5MSY20BR
A5MSY25BR
A5MSY30BR
Models:

A5MSY_(i) Table of Contents
Table of Contents
Nomenclature......................................................................................................................1
Indoor ............................................................................................................................1
Outdoor..........................................................................................................................1
Product Line-Up.............................................................................................................2
Application Information .....................................................................................................5
Operating Range ...........................................................................................................5
Refrigerant Circuit Diagrams .........................................................................................6
Installation Guideline .....................................................................................................7
Engineering & Physical Data...........................................................................................20
Performance Data.............................................................................................................26
Outline and Dimension ....................................................................................................29
Wiring Diagram .................................................................................................................34
Service and Maintenance.................................................................................................40
Troubleshooting ...............................................................................................................42
Exploded View and Part List ...........................................................................................50
Supercedes: A5MSY-B-2010

Nomenclature A5MSY_(i)
1
Nomenclature
Indoor
Outdoor
A 5 WM Y 10 L R – A C B D D
Brand
A: Acson
Refrigerant
5: R410A
Product Type
WM: Wall Mounted
CK : Ceiling Cassette
CC: Ceiling Concealed
CM: Ceiling Mounted
Size
10 : § 10,000 Btu/h
15 : § 15,000 Btu/h
20 : §
20,000 Btu/h
25 : § 20,000 Btu/h
Inverter System Type
Y: Y Series
Product series
L: L series J: J series
C: C Series E: E series
Model
“ ”: Cooling Only
R: Heat Pump
Product Specification
Variation
D: Fourth Issue
Grille
D: Grille D
Type of Air Filte
r
B: Bio Filter
Market Region
C: Ex
p
ort with CE Markin
g
Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
F : 50Hz / 3Ph / 380-415V
A5 MS Y 18 B R – A C D O A
Brand
A: Acson
Product Type
MS: Multi Split Condensing Unit
Size
Product series
B: B Series
Refrigerant
5: R410A
Inverter System Type
Y: Y Series
Model
“ ”: Cooling Only
R: Heat Pump
Electrical Characteristics
A : 50Hz / 1Ph / 220-240V
F : 50Hz / 3Ph / 380-415V
Product Specification
Variation
A: First Issue
Specifications Variation
O: Standard Unit
Compresso
r
D: Daikin Com
p
resso
r
Market Region
C: Ex
p
ort with CE Markin
g
18 : § 18,000 Btu/h
20 : § 20,000 Btu/h
25 : §
25,000 Btu/h
30 : §
30,000 Btu/h

2
A5MSY_(i) Nomenclature
Product Line-Up
Indoor Unit
A5WMY-L Series/J Series
A5WMY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS02 W_2_03A Saranet Filter Bio Antibody Filter Titanium Apatite Filter CE Auto Restart
HEATPUMP
10LR ACBDD X X X X X X X
15LR ACBDD X X X X X X X
10JR ACLBD X X X X X
15JR ACLBD X X X X X
20JR ACLTC X X X X X
Indoor Unit
A5CKY-C Series
A5CKY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS02 C_2_01A_M Saranet Filter Negative Ionizer Nano Technology Air Filtration CE Auto Restart
HEATPUMP
10CR ACOA X X X
15CR ACOA X X X
20CR ACOA X X X
PLCKYCR NGS02 X X X

3
Nomenclature A5MSY_(i)
Indoor Unit
A5CCY-C Series
A5CCY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
Netware 3C C_2_01A_M Saranet Filter Negative Ionizer Nano Technology Air Filtration CE Auto Restart
HEAT- PUMP
10CR ACPA X X X X X
15CR ACPA X X X X X
20CR ACPA X X X X X
Indoor Unit
A5CMY-E Series
A5CMY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS02 C_2_01A_M Saranet Filter Negative Ionizer Nano Technology Air Filtration CE Auto Restart
HEAT- PUMP
15ER ACAA X X X X X
20ER ACAA X X X X X

4
A5MSY_(i) Nomenclature
Outdoor Unit
A5MSY-BR
A5MSY
Nomenclature
Classification
Refrigerant Control Fin Safety Devices Compressor Marking Others
Cap Tube EXV Gold coated Blue coated Bare Contactor HP LP DC Inverter Swing CE Drain Elbow
HEATPUMP
18BR ACDOA XX XXX
20BR ACDOA XX XXX
25BR ACDOA XX XXX
30BR ACDOA XX XXX
* Remark : A5MSY18BR is not recommended to couple with A5WMY10/15 JR (for Wall Mounted series).
A5MSY18BR is recommended to couple with A5WMY10/15 LR (for Wall Mounted series).

5
Application Information A5MSY_(i)
Application Information
Operating Range
Ensure the operating temperature is in allowable range.
Heatpump - A5MSY20/25/30BR
Heating
Outdoor temp. (°CWB)
Indoor temp. (°CDB)
Cooling
Outdoor temp. (°CDB)
Indoor temp. (°CWB)
-16
15 20 27
18
Standard
point
Caution :
The use of your air conditioner
outside the range of working
temperature and humidity can result
in serious failure.
0
46
43
12 2319
10
Heating
Outdoor temp. (°CWB)
Indoor temp. (°CDB)
-16
15 20 27
18
10
Indoor temp. (°CWB)
Cooling
Heatpump - A5MSY18BR

6
A5MSY_(i) Application Information
Refrigerant Circuit Diagrams
Model: A5MSY18BR
A5MSY20BR
Model: A5MSY25BR
A5MSY30BR

7
Application Information A5MSY_(i)
Installation Guideline
Installation of Outdoor Unit
• The outdoor unit must be installed in such a way, so as to prevent short circuit of the hot discharged air or
obstruction to the smooth air flow. Please follow the installation clearance shown in the figures below. Select
the coolest possible place where intake air temperature is not greater than the outside air temperature
(maximum 45°C/113°F)
• Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow, follow the installation
guidelines below.
• For any of the below installation patterns, the wall height on the exhaust side should be 1200mm or less.
More than 100
Wall facing two sidesWall facing one side
Wall facing three sides
More than 350
More than 50 More than 50
Top View
Top View
Side View
More
than 100
More than 350
More than 100
More than 350
More than 50
Unit : mm
1200
or less
• There are 2 holes on the base of Outdoor Unit for
condensed water to flow out. Insert the drain elbow
to one of the holes.
• To install the drain elbow, first insert one portion
of the hook to the base (portion A), then pull the
drain elbow in the direction shown by the arrow
while inserting the other portion to the base. After
installation, check to ensure that the drain elbow
clings to base firmly.
• If the unit is installed in a snowy and chilly area,
condensed water may freeze in the base. In such
case, please remove plug at the bottom of unit to
smooth the drainage.
PLEASE REMOVE
ACCESS PANEL &
PLASTIC VALVE
COVER WHEN
CONNECTING
THE PIPING AND
CONNECTING
CORD.
PUSH & PULL UP
A
DRAIN
ELBOW
Plug
BASE
DRAIN
ELBOW
• Before installing the piping and connecting cord, please remove the access panel and plastic valve cover for
easy access. Refer to figures shown below.

8
A5MSY_(i) Application Information
Installation Diagram
Wall Mounted
Indoor Unit
Air filter M4 x 12L
Air-Purifying Filter with
bacteriostatic virustatic function (2)
Front panel
30mm or more from ceiling
Outdoor Unit
50mm or more from walls
(on both sides)
Air filter
Air-Purifying Filter with
bacteriostatic virustatic
function
Filter frame
Tab
Caulk pipe
hole gap
with putty.
Cut thermal insulation
pipe to an appropriate
length and wrap it with
tape, making sure that no
gap is left in the insulation
pipe's cut line.
Wrap the insulation pipe with
the finishing tape from bottom
to top.
Service lid
Opening service lid
Service lid is opening/closing
type.
Opening method
1) Remove the service lid
screws.
2) Pull out the service lid
diagonally down in
the direction of the arrow.
1) Pull down.
250mm from wall
Caution
Before installing the unit, ensure that the power supply matches the power requirement of the air conditioner.s
Installation of Indoor Unit
Service Space
Install the indoor unit at a location with the following requirements
• Location is suitable for wiring, piping and drainage.
• No obstruction of air flow into and out of unit where cooler air can be evenly distributed.
• Ensure that air discharge is not short circuited with air intake.
• Ensure that wall is sufficiently strong, rigid, flat, perpendicular and vibration free.
• Where air filter cassette can be slided in or out easily.
• Where there is no danger of flammable gases.
• Where there is no direct sunlight on unit.
min. 50
(Space for
maintenance)
Air flow
(Indoor)
min. 50
(Space for
maintenance)
03.nim
rofecapS(
)ecnamrofrep
Required space

9
Application Information A5MSY_(i)
Ceiling Cassette
Drain Piping
Front Panel
Air Filter
(behind the grille)
Air Intake Grille
Air Discharge Louver
Thermal Insulation
Wrap the insulated pipe with the
finishing tape from bottom to top
Preliminary Site Survey
• Electrical supply and installation is to confirm to local authority’s (e.g. National Electrical Board) codes and
regulations.
• Voltage supply fluctuation must not exceed ± 10% of rated voltage. Electricity supply lines must be
independent of welding transformers which can cause high supply fluctuation.
• Ensure that the location is convenient for wiring, piping and drainage.
• The indoor unit must be installed in such that free from any obstacles in path of cool air discharge and
warm air return, and must allow spreading or air throughout the room (near the centre of the room).
• Clearance must be provided for the indoor unit from the wall and obstacles as shown in the figure.
Min 1.0 m
Max 3.0 m
Floor
Obstacles
Min 0.5 m Min 0.5 m Min 0.5 m
Max 3.0 m
Beam
• The installation place must be strong enough to support a load of 4 times the indoor unit weight to avoid
amplifying noise and vibration.
• The installation place (handling ceiling surface) must be level and the height in the ceiling is 350mm or
more.

10
A5MSY_(i) Application Information
Unit Installation
15.0 538.0 18.0
88.0448.0
19.0529.0
32.0
505.0
)TNEMERUSAEMGNINEPOGNILIEC(mm016~0.085
580.0 ~ 610mm (CEILING OPENING MEASUREMENT)
38.0
A5CKY-C
• The indoor unit must be away from heat and steam sources (avoid installing it near an entrance).
• Measure and mark the position for the hanging rod. Drill the hole for the angle nut on the ceiling and fix
the hanging rod.
• The installation template is extended according to temperature and humidity. Check on dimensions in
using.
• The dimensions of the installation template are same as those of the ceiling opening dimensions.
• Before ceiling laminating work is completed, be sure to fit the installation template to the indoor unit.
Note: Be sure to discuss the ceiling drilling work with the installers concerned.
Unit Hanging
Indoor Unit
Ceiling
Bo
30.0mm
ard
A5CKY-C/E
• Confirm the pitch of the hanging rod is 770mm x 622mm sharp (A5CKY-E)
• Hold the unit and hand it on the hanging rod with the nut and washer.
• Adjust the unit height to 35.0mm between the indoor unit bottom surface and the ceiling surface.
• Confirm with a level gauge that the unit is installed horizontally and tighten the nut and bol to prevent unit
falling and vibration.
• Open the ceiling board along the outer edge of the paper installation template.

11
Application Information A5MSY_(i)
Ceiling Concealed
Thermal insulation
Wrap the insulated pipe with the
finishing tape from bottom to top
Drain
piping
Ceiling
Supply duct
Return duct
Hanger
Preliminary Survey
• Electrical supply and installation is to confirm to local authority’s (e.g. National Electrical Board) codes and
regulations.
• Voltage supply fluctuation must not exceed ± 10% of rated voltage. Electricity supply lines must be
independent of welding transformers which can cause high supply fluctuation.
• Ensure that the location is convenient for wiring, piping and drainage.
• The indoor unit must be installed in such that free from any obstacles in path of cool air discharge and
warm air return, and must allow spreading or air throughout the room (near the centre of the room).
• Clearance must be provided for the indoor unit from the wall and obstacles as shown in the figure.
• Use the hanger supplied with the unit.
• Ensure the support is strong enough to withstand the weight of the unit.
• Use the supplied drain socket to connect the drain pipe
Install the unit in such a way that
the condensate water can flow
out smoothly.

12
A5MSY_(i) Application Information
The diagrams below show the screws position for duct work connection.

13
Application Information A5MSY_(i)
Ceiling Convertible
Preliminary Site Survey
• Electrical supply and installation is to confirm to local authority’s (e.g. National Electrical Board) codes and
regulations.
• Voltage supply fluctuation must not exceed ± 10% of rated voltage. Electricity supply lines must be
independent of welding transformers which can cause high supply fluctuation.
• Ensure that the location is convenient for wiring, piping and drainage.
Standard Mounting
Ensure that the overhead supports are strong enough to hold the weight of the unit. Position the hanger rods
(wall mounting bracket for floor standing), and check for its alignment with the unit as shown in Fig. below.
Also,check that the hangers are secured and the base of the fan coil unit is leveled in both horizontal
directions, taking into account the gradient for drainage flow as recommended under section Piping and
Drain Hose Installation.

14
A5MSY_(i) Application Information
Please ensure that the following steps are taken:
• Check the gradient for drainage flow as recommended in Figure A.
• Provide clearance for easy servicing and optimal air flow as shown in Figure B.
• The indoor unit must be installed such that there is no short circuit of the cool discharge air with the warm
return air.
• Do not install the indoor unit where there is direct sunlight shining on the unit. The location should be suit-
able for piping and drainage installation. The unit must be a large distance away from the door.
Fig.A
Fig.B
Under ceiling type
Floor standing type

15
Application Information A5MSY_(i)
Under Ceiling Installation
Install the Suspension Bolts
1. Install the suspension bolts so that it can support the indoor unit.
2. Adjust the distance to ceiling before installation.
3. Refer to the dimension given to install the unit.
Install the Indoor Unit
1. Insert the suspension bolts into the fittings of the hanger bracket.
2. Set the nuts and washer on the both side of the metal fittings.
3. Secure it with nuts.
4. Attach the hanger cover (4 pcs) to the units.

16
A5MSY_(i) Application Information
Floor Standing Installation
1. Refer to the dimension as illustrated when installing the mounting bracket.
2. Determine the pipe hose position using the rear piping hole. Drill the pipe hole at the slight downward
slant to the outdoor side.
WALL
MOUNTING BRACKET
HOCK THE UNIT ON THE
MOUNTING BRACKET

17
Application Information A5MSY_(i)
REFRIGERANT PIPING
Piping Length & Elevation
If the pipe is too long, both capacity and reliability of the unit will drop. As the number of bends increases,
resistance to the flow of refrigerant system increases, thus lowering cooling capacity. As a result, the
compressor may become defective. Always choose the shortest path and not exceed the maximum piping
length as tabulated below.
Model
Maximum
Total Piping
Length (m)
Single Indoor
Maximum
Piping
Length(m)
Maximum
height
Difference(m)
Pre-charged
Total Piping
length (m)
Outdoor Unit
Pre-charged
(kg)
Amount of
Additional
Charge (g/m)
A5MSY18BR
(2 Ports) L1+ L2≤30 L ≤20 H ≤15 15 1.2 20
A5MSY20BR
(2 Ports) L1+ L2≤50 L ≤25 H ≤15 30 2.0 20
A5MSY25BR
(3 Ports)
L1+ L2+ L3≤
60 L ≤25 H ≤15 30 2.6 20
A5MSY30BR
(4 Ports)
L1+ L2+ L3+ L4
≤60 L ≤25 H ≤15 30 2.6 20
INDOOR UNIT
OUTDOOR UNIT
VERTICAL HEIGHT
DIFFERENCE MAX. H
* Remark : Applicable for Wall Mounted, Ceiling Cassette, Ceiling Concealed, Ceiling Convertible unit.

18
A5MSY_(i) Application Information
Piping Connection To The Units
• The outdoor unit is equipped with two to four sets of flare joints depending on O/D unit model. Refer to the
table below for flare joint size and location.
18
Model Pipe A B C D
A5MSY18BR Liquid 1/4” 1/4” - -
Gas 3/8” 3/8” - -
A5MSY20BR Liquid 1/4” 1/4” - -
Gas 1/2” 1/2” - -
A5MSY25BR Liquid 1/4” 1/4” 1/4” -
Gas 3/8” 1/2” 1/2” -
A5MSY30BR Liquid 1/4” 1/4” 1/4” 1/4”
Gas 3/8” 3/8” 1/2” 1/2”
ELECTRICAL WIRING CONNECTION
IMPORTANT: The figures shown in the table are for information purpose only. They should be checked and
selected to comply with the local/national codes of regulations. This is also to the type of
installation and conductors used.
Indoor Unit A Indoor Unit B Indoor Unit C Indoor Unit D
Power
Supply
Power Supply
DCBA
1 2 SIG N L 1 2 SIG N L 1 2 SIG N L1 2 SIG N L
SIGNLNLNLNLNL
SIG SIG SIG
0 There must be a double pole switch with a minimum 3 mm contact gap and fuse/ circuit breaker as
recommended in the fixed installation circuit.
• All wiring must be connected accordingly to the diagram
above, with reference to the piping connection. Mismatch
any wiring with different piping will cause severe damage
to the system.
• All wires must be firmly connected.
• All wires must not touch the refrigerant piping, compressor
or any moving parts of the fan motor.
• The connecting wires between the indoor unit and the
outdoor unit must be clamped on the wire clamps and the
cable tie (push releasable) at the indoor unit and outdoor
unit respectively as shown in the figures.
• The power supply cord must be equivalent to H07RN-F
(245IEC57) or higher.
• Remove the detachable part of the access cover to allow
wire routing.
• All wires must not be clamped by the access panel cover.
Detachable part
Wires
mustn't be
clamped
Wire Clamp
Interconnection
Cable