Acson A5MSY20BR User manual

Inverter-Y Multi Split
A5MSY - 2010
A5MSY20BR
A5MSY25BR
A5MSY30BR
Models:

Table of Contents A5MSY-2010
Contents
Nomenclature......................................................................................................................1
Indoor Unit .....................................................................................................................1
Outdoor Unit ..................................................................................................................3
Product Line-Up.............................................................................................................4
Features.............................................................................................................................10
Application Information ................................................................................................... 11
Operating Range ......................................................................................................... 11
Refrigerant Circuit Diagram .........................................................................................12
Controller ....................................................................................................................14
Installation Guideline ...................................................................................................17
Engineering & Physical Data...........................................................................................42
General Data - Heat pump ..........................................................................................42
Components Data - Heat pump...................................................................................48
Performance Data.............................................................................................................54
Outline and Dimension ....................................................................................................57
Electrical Data...................................................................................................................61
Wiring Diagram .................................................................................................................63
Service and Maintenance.................................................................................................70
Troubleshooting ...............................................................................................................72
Exploded View and Part List ...........................................................................................82

Nomenclature A5MSY-2010
1
Nomenclature
Indoor Unit
A 5 WM Y 10 J R
Brand
A : Acson
Refrigerant
5 : R410A
Model Name
WM : Wall Mounted
Inverter System Type
Y : Y series
Capacity Index
10
15
20
25
: 10,000 Btu/h
: 15,000 Btu/h
: 20,000 Btu/h
: 25,000 Btu/h
Chassis
J : J Series
Model Type
“ “
R
: Omitted if cooling only
: Heatpump

A5MSY-2010 Nomenclature
2
Indoor Unit
A 5 CK Y 10 C R
Brand
A : Acson
Refrigerant
5 : R410A
Model Name
CK
CC
CM
: Ceiling Cassette
: Ceiling Concealed
: Ceiling Mounted
Inverter System Type
Y : Y series
Capacity Index
10
15
20
25
: 10,000 Btu/h
: 15,000 Btu/h
: 20,000 Btu/h
: 25,000 Btu/h
Chassis
C
E
: C Series
: E Series
Model Type
“ “
R
: Omitted if cooling only
: Heatpump

Nomenclature A5MSY-2010
3
Outdoor Unit
A 5 MS Y 20 B R
Brand
A : Acson
Refrigerant
5 : R410A
Model Name
MS : Multi Split Condensing Unit
Inverter System Type
Y : Y series
Capacity Index
20
25
30
: 20,000 Btu/h
: 25,000 Btu/h
: 30,000 Btu/h
Chassis
B : B Series
Model Type
“ “
R
: Omitted if cooling only
: Heatpump

4
A5MSY-2010 Product Line-Up
Product Line-Up
Indoor Unit
A5WMY-J Series
A5WMY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS01 W_2_03A Saranet Filter Negative Ionizer Nano Technology Air Filtration CE Auto Restart
HEATPUMP
10JR ACLTC X X X X X
15JR ACLTC X X X X X
20JR ACLTA X X X X X
25JR ACLTA X X X X X

5
Product Line-Up A5MSY-2010
Indoor Unit
A5CKY-C Series
A5CKY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS01 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 NGS01 X X X

6
A5MSY-2010 Product Line-Up
Indoor Unit
A5CKY-E Series
A5CKY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS01 C_2_01A_M Saranet Filter Negative Ionizer Nano Technology Air Filtration CE Auto Restart
HEATPUMP
20ER ACOA X X X
25ER ACOA X X X
PLCKYER NGS01 X X X

7
Product Line-Up A5MSY-2010
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
HEATPUMP
10CR ACPA X X X X X
15CR ACPA X X X X X
20CR ACPA X X X X X
25CR ACPA X X X X X

8
A5MSY-2010 Product Line-Up
Indoor Unit
A5CMY-E Series
A5CMY
Nomenclature
Classification
Handset PCB Air Purification Marking Others
GS01 C_2_01A_M Saranet Filter Negative Ionizer Nano Technology Air Filtration CE Auto Restart
HEATPUMP
15ER ACAA X X X X X
20ER ACAA X X X X X
25ER ACAA X X X X X

9
Product Line-Up A5MSY-2010
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
20BR ACDOA XX XXX
25BR ACDOA XX XXX
30BR ACDOA XX XXX

10
A5MSY-2010 Features
Features
Self Diagnosis
The microprocessor provides the possibility to detect and diagnose any fault or malfunction that occurs in the
system. The error will be reflected by the blinking of the LED lights.
Advance Technology
Incorporating fuzzy logic control enables greater flexibility in system control handling to achieve
Powerful, efficient and economical operation.
Even room temperature control.
Constant and quiet compressor operation.
Enhanced system reliability and reduced maintenance costs.
On / Off Button on Indoor Unit
On/Off button is provided on the front panel of the unit. It can be used when the remote controller is missing or
if its battery has run out. (Note: This button can also be used for forced operation mode)
Wireless Remote Controller
The compact LCD transmitter is able to operate the air conditioner unit within the distance of 8 meters.
Fan speed can be set at high / medium / low / super low or automatic.
Sleep mode auto control will gradually increase or decrease the setting temperature to provide a
comfortable surrounding for sleeping.
Air flow direction can be controlled automatically.
Room temperature is controlled by electronic thermostat.
The real time timer allows the air conditioner to be switched On and Off automatically based on user
settings.
Turbo mode function is available to enables the required set temperature to be achieved in a short time.
Personalized Setting allows user to preset and store 2 groups of personal settings (including timer setting)
in the handset.
Higher Energy Savings
The inverter compressor is programmed to run at the optimum speed. This is controlled by input frequency that
varies according to the indoor load requirements.
Once the indoor set temperature is achieved, the input frequency supply to the compressor will be reduced.
Hence, less power is required to maintain the unit operation and this will consume less energy.
Improved Compressor Life Span
For this multi-split inverter system, once the unit is started, the compressor rotation speed is steadily ramp up
or down based on load requirement throughout the operation. This control method gives the compressor motor
a smooth operation. It helps to reduce the wear and tear of the compressor motor. In the long run, the life span
of compressor is increased.
Overheating Protection (for heat pump unit only)
In case the internal and/or the external temperature are too high, or the filter is dirty and clogged up, the
refrigerant may be overheated. The compressor will reduce its running speed in order to lower the temperature
of heat exchanger. If the temperature is still very high, the compressor will stop.
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Application Information A5MSY-2010
Application Information
Operating Range
Ensure the operating temperature is in allowable range.
Heatpump
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

12
A5MSY-2010 Application Information
Refrigerant Circuit Diagram
Model: A5MSY20BR

13
Application Information A5MSY-2010
Refrigerant Circuit Diagram
Model: A5MSY25BR
A5MSY30BR

14
A5MSY-2010 Application Information
Controller
GS01
SWING
TURBO
QUIET SLEEP
ON
CANCEL CANCEL
OFF
TIMER
CLOCK
MODE
FAN
8
6
7
9
11
1
2
3
4
5
13
12
10

15
Application Information A5MSY-2010
1 Transmission source
The source where the signal will be transmitted.•
2 Signal transmission indication
Blink to confirm that the last setting has been transmitted
to the unit.
•
3 “ON/OFF” Button
Press once to start the air conditioner unit.
Press again to stop the unit.
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4 Fan Speed Selection
Press the button continuously will toggle the fan speed
in the following order:
Low pMed pHigh pAuto
Stop pressing when the desired fan speed appears on the
display screen.
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5 Operation mode
Press the MODE button to select the type of operating
mode.
For cooling only unit, the available modes are: COOL (7),
DRY (6) and FAN ( ).
For heat pump unit, the available modes are: AUTO (U),
COOL (7), DRY (6), FAN ( ) and HEAT ( ).
The AUTO (U) mode is unavailable for chilled water
system.
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6 Automatic air swing
Press the SWING button to activate the automatic air
swing function.
To distribute the air to a specific direction, press the
SWING button and wait until the louver move to the
desired direction and press the button once again.
Swing mode selection method (for CK-E model)
Press SWING ( ) button for 4 seconds to enter field
setting mode. While in field setting mode, it will only show
SWING MODE ( ).
Press temperature and button to select SWING MODE ( )
rotation from Swing Mode 1 to Swing Mode 3.
There are 3 different SWING MODE, which are:
Swing mode 1 Swing mode 2 Swing mode 3
SWING MODE will not activate unless SWING is activated.
Swing is indicated by the logo:
If no mode changes within 4 seconds, unit will operate
according to the selected SWING MODE ( ).
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7 Turbo function (model dependent)
Press for fast cooling or heating operation.
Fan speed turn to maximum speed.
Press again to deactivate the function.
Available under HEAT, COOL and DRY modes only.
Any change of fan speed will deactivate this function.
The Turbo function ( ) is unavailable for chilled water
system and remote control with SWING MODE ( )
function.
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8 OFF timer setting
Press the TIMER OFF button will activate the off timer
function.
Set the desired off time by pressing the TIMER OFF button
continuously.
Press the CANCEL button to cancel the off timer setting.
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9 Quiet function (model dependant)
Press for quiet operation.
Fan speed turn to minimum speed.
Press again to deactivate the function.
Any change of fan speed will deactivate this function.
The Silent function ( ) is unavailable for chiller water
system.
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10 Clock time setting
Press and hold button to set the clock time.•
11 ON timer setting
Press the TIMER ON button will activate the on timer
function.
Set the desired on time by pressing the TIMER ON
button continuously. If the timer is set to 7.30am, the air
conditioner will turn on at 7.30am sharp.
Press the CANCEL button to cancel the on timer setting.
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12 Sleep mode setting
Press the button will activate the sleep mode function.
This is an energy
saving option. When
the unit is operating
under cooling mode,
the set temperature is
increased by 0.5°C
after the first half an
hour, another 0.5°C
after the second half an
hour and 1°C after the
following 1 hour.
When the unit is
operating under
heating mode, the set
temperature is decreased by 1°C after the first half an
hour, another 1°C after the second half an hour and 1°C
after the following 1 hour.
This function is available under COOL, HEAT and AUTO
mode.
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13 Temperature setting
To set the desired room temperature, press the * or *
button to increase or decrease the set temperature.
The temperature setting range is from 16°C to 30°C
(Optional setting 20°C to 30°C).
Press both buttons Sand Tsimultaneously to toggle from
°C to °F setting.
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+2 C
+1 C
-1C
-2C
00.51 1.52
-3C
Operation Guide

16
A5MSY-2010 Application Information
Controller
Netware 3C
1 ON/OFF Button
Starting Operation:
When the unit is turned off, press the ON/OFF button.
The operation LED lights and the unit is turned on.
Stopping Operation:
When the unit is turned on, press the ON/OFF button. The
operation LED is extinguished and control are turned off.
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2 SLEEP Button
Press SLEEP button to activate the sleep mode or energy
saving mode.
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3 FAN Button
Press FAN button to select AUTO, HIGH, MEDIUM or LOW
fan speed.
•
4 MODE Button
Press the MODE button to switch operation from COOL,
HEAT, DRY, FAN.
Check the display to see in which mode the control is set.
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5,6 ‘▲’ or ‘▼’ Set Temperature Button
Press the temperature button and set the temperature
of your choice. By pressing the ‘▲’ or ‘▼’ button once,
temperature changes by 1°C [or 1°F].
Temperature can be set within the range 16°C~30°C
(61°F~86°F)
During fan mode, temperature cannot be set.
If pressing ‘▲’ and ‘▼’ together, the unit of temperature will
change from °C to °F and vice-versa.
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7 SWING button
Press SWING button to activate the air sweep function.•
8 ON TIMER Button
Enable/disable the Event 1, 2 and 3 ON TIMER setting
mode
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9 OFF TIMER Button
Enable/disable the Event 1, 2 and 3 OFF TIMER setting
mode
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10 Timer Active Button
These timers will not triggered if the timer is not active.
To activate the timers, press the TIMER ACTIVE key
unit “TIMER ACTIVE” appears on LCD. This symbol is to
indicate Event 1, Event 2 and/or Event 3 timers are active.
Pressing the same steps will deactivate the timers and
“TIMER ACTIVE” symbol will disappear.
Another method to cancel the timers setting is changed all
the hour setting of the timers to null one by one. When the
setting is null, the LCD display --:--, then this respective
timer will be disable.
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11 CLOCK Button
Enable/disable the Real Time Clock (RTC) setting mode•
12 DAY Button
a) Select the day for RTC or timer setting
b) Enable/disable FAN Key lock
13 HOUR Button
a) Select the hour for RTC or timer settings
b) Set Override function for 1, 2 or 4 hours
14 MINUTE Button
a) Select the minute for RTC or timer settings
b) Enable/disable key lock

17
Application Information A5MSY-2010
Installation Guideline
Safety Precautions
WARNING CAUTION
Installation and maintenance should be performed by qualified
persons who are familiar with local code and regulation, and
experienced with this type of appliance.
All field wiring must be installed in accordance with the national
wiring regulation.
Ensure that the rated voltage of the unit corresponds to that of the
name plate before commencing wiring work according to the wiring
diagram.
The unit must be GROUNDED to prevent possible hazard due to
insulation failure.
All electrical wiring must not touch the refrigerant piping or any
moving parts of the fan motors.
Confirm that the unit has been switched OFF before installing or
servicing the unit.
Disconnect from the main power supply before servicing the air
conditioner unit.
DO NOT pull out the power cord when the power is ON. This may
cause serious electrical shocks which may result in fire hazards.
Keep the indoor and outdoor units, power cable and transmission
wiring, at least 1m from TVs and radios, to prevent distorted
pictures and static. {Depending on the type and source of the
electrical waves, static may be heard even when more than 1m
away}.
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Please take note of the following important points
when installing.
Do not install the unit where leakage of ammable
gas may occur.
If gas leaks and accumulates around the unit, it
may cause reignition.
Ensure that drainage piping is connected properly.
If the drainage piping is not connected properly,
it may cause water leakage which will dampen
the furniture.
Do not overcharge the unit.
This unit is factory pre-charged. Overcharge will
cause over-current or damage to the compressor.
Ensure that the unit’s panel is closed after service
or installation.
Unsecured panels will cause the unit to operate
noisily.
Sharp edges and coil surfaces are potential
locations which may cause injury hazards. Avoid
from being in contact with these places.
Before turning off the power supply, set the remote
controller’s ON/OFF switch to the “OFF” position
to prevent the nuisance tripping of the unit. If this is
not done, the unit’s fans will start turning automatically
when power resumes, posing a hazard to service
personnel or the user.
Do not operate any heating apparatus too close to the
air conditioner unit. This may cause the plastic panel to
melt or deform as a result of the excessive heat.
Ensure the color of wires of the outdoor unit and
the terminal markings are same to the indoors
respectively.
IMPORTANT : DO NOT INSTALL OR USE THE
AIR CONDITIONER UNIT IN A LAUNDRY ROOM.
Do not use joined and twisted wires for incoming
power supply.
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NOTICE
Disposal requirements
Your air conditioning product is marked with this symbol. This means that electrical and electronic products
shall not be mixed with unsorted household waste.
Do not try to dismantle the system yourself: the dismantling of the air conditioning system, treatment of
the refrigerant, of oil and of other parts must be done by a qualied installer in accordance with relevant
local and national legislation. Air conditioners must be treated at a specialized treatment facility for re-use,
recycling and recovery. By ensuring this product is disposed of correctly, you will help to prevent potential
negative consequences for the environment and human health. Please contact the installer or local authority
for more information.
Batteries must be removed from the remote controller and disposed of separately in accordance with relevant
local and national legislation.