Acson A5CK20A User manual

Ceiling Cassette
Split Systems
ACK-A_B_C-2006
A5CK20A/AR
A5CK25A/AR
A5CK30A/AR
A5CK40A/AR
A5CK50A/AR
A5CK1 0C/CR
A5CK15C/CR
A5CK2 0C/CR
Models:
ISO 9002
REGISTERED

1. NOMENCLATURE
INDOOR
B BFA
-
Model T
yp
e
R : Heatpump
Omitted if Cooling Only
Series
A : A Series
B : B Series
C : C Series
Capacit
y
20 : 20,000 Btu/h
Model Name
CK : Ceiling Cassette
Refrigerant
5 : R410A
Omitted if R22
Brand
A : Acson
Electrical Characteristic
F : For Flare
T
yp
e of Connection
Product Specification Variation
A
A
: Revision
A : 220 – 240V/1Ph/50Hz
K : 208 – 230V/1Ph/60Hz
CK 20 A R
5A
1

O APCA
-
Model T
y
pe
R : Heatpump
Omitted if Coolin
g
Onl
y
Series
C : C series
Capacit
y
20 : 20,000 Btu/h
Model Name
LC : Single Split Condensing Unit
Refri
g
erant
5 : R410A
Omitted if R22 Model
Brand
A : Acson
Electrical
A : 220-240V/1Ph/50Hz
Market Re
g
ion
P : Matsushita Rotary
M : Mitsubis
hi Rotary
Compressor
Specifications Variation
O : Standard Unit
B : with Contactor
G : Low Ambient Unit
H : High Ambient Unit
Others
A
: First issue
C : Export with CE marking
E : Export without marking
U : ETL spec
LC 20 C R5A
T : Toshiba Rotary
I : Gold Fins
L : Long Piping Unit
S : With H/L Pressure Switch
X : Oxygen Unit
OUTDOOR
2

2. FEATURES
ULTRA SLIM NEW STYLISH DESIGN PROFILE
This unit is contemporary in design and match even the most up to date interior decor. The slim, (only
20mm for C-series, 22 mm for B-series and only 28 mm for A-series) and round profile front panel of this
unit adds a touch of elegance to every decor.
TURBO MIXED FLOW FAN
Innovative design of highly efficient turbo fan produces an even air circulation in all direction.
BUILT-IN HIGH HEAD DRAIN PUMP
The unit has a built-in high head drain pump (with 700 mm drain head) to provide and ensure smoothness
drainage of condensate water.
STRONG AND ROBUST
The unit is built from strong casing material and robust parts to ensure long lasting reliable service. The
drain pan is made from the POLYSTYRENE with a plastic coating on the surface to ensure no leaking and
condensation occur.
FRIENDLY SERVICEABILITY
The air filter, electrical parts, fan, fan motor and drain pump can all be inspected and replaced from the
bottom of the unit by simply removing the air intake grille. The POLYSTYRENE drain pan and the heat
exchanger coils can be removed from the unit easily by removing the front panel.
MICROCOMPUTER REMOTE CONTROLLER
The incorporated microprocessor offers more accurate control and with the following extra features:
• Fan motor speed can be set at high/medium/low or automatic.
• Timer on/off - the unit can be pre-set to switch on and off automatically.
• Electronic thermostat - room temperature is precisely controlled, resulting in energy saving and increase
comfort.
WIRELESS REMOTE CONTROLLER
The compact wireless remote controller makes it possible to operate the air conditioner anywhere within the
room.
3

11. CONTROLLER
G12 REMOTE CONTROLLER
Temperature Setting
•To set the desired room
temperature, press the button to
increase or decrease the set
temperature.
•The temperature setting range is
from 16°C to 30°C
•Press both buttons simultaneously
to toggle the temperature setting
between °C and °F
Turbo Mode
•Press the TURBO button to
achieve the required set
temperature in a short time.
ON Timer Setting
•Press the SET button will activate
the on timer function.
•Set the desired on time by pressing
the SET button continuously.
•Press the CLR button to cancel the
off timer setting
Sleep Mode
•Press the button to activate sleep
mode. This function is available
under COOL, HEAT & AUTO
mode.
•When it is activated in COOL
mode, the set temperature will be
increased 0.5°C after 30mins, 1°C
after 1 hour and 2°C after 2 hours.
•When it is activated in HEAT
mode, the set temperature will be
decreased 1°C after 30mins, 2°C
after 1 hour and 3°C after 2 hours.
Personalised Setting
•Press and hold the button for 3s to
initiate personalized setting.
•Set the individual setting e.g.
MODE, SET TEMP or FAN SPEED
and leave for 4s to save
•2 groups of settings are allowed to
stored in the handset
Fan Speed Selection
•Press the button until the desired
fan speed is achieved.
Operating Mode
•Press the MODE button to select
the type of operating mode.
•For Cooling only unit, the available
modes are: COOL, DRY & FAN.
•For Heatpump unit, the available
modes are: AUTO, COOL, DRY,
FAN & HEAT.
OFF Timer Setting
•Press the SET button will activate
the off timer function.
•Set the desired off time by
pressing the SET button
continuously.
•Press the CLR button to cancel the
off timer setting
Automatic Air Awing
•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.
On/Off Button
•Press Once to start the air
conditioner
•Press again to stop the unit
Clock Time Setting
•Press button + or - to increase or
decrease the clock time.
Ionizer
•Press the button to activate the
negative Ion function, which will
refresh the indoor air effectively.
4

COOL
DRY
HEATMED
HIGH
AUTO
MODE
TEMP
SENSOR
ON/OFF
SLEEP
LOW
TIMER
8
2
5
9
3
6
4
1
FAN
FA
N
ON/OFF
T
EM
P
SLEEP
TIMER MODE
7
1
2
3
4
5
6
10
7
SWING
SWING
FAN
SLM AC-5300 (OPTIONAL)
1. “ON/OFF” switch 6. “Sleep” mode
• Press to start the air conditioner unit. • Press button to activate the sleep
• Press again to stop the unit. function can only be activated under
“cool” or heating mode operation.
2. Temperature setting activated under “cool” mode operation, the
• Set the desired room temperature. set temperature will increase 0.5°C after 30
• Press button to increase or decrease the minutes, 1°C after 1 hour and 2°C after 2
set temperature. Setting range are between hours. If it is actiaved under “HEAT” mode
16°C to 30°C (60°F to 80°F). operation, the set temperature will be
descreased 0.5°C after 30 minutes, 1°C
3. Operation Modes after 1 hour and 2°C after 2 hours.
• Press the “mode” button for select the type
of operating mode. 7. Air Swing
- Cooling Only : • Press button to activate the automatic air
COOL, DRY, FAN swing function.
- Heat Pump :
AUTO, COOL, DRY, HEAT, FAN 8. Sensor
(AUTO mode is represented by both • Infra red sensor to receive signals from
COOL and HEAT LED light on) wireless controller.
4. Fan Speed selection. 9. LED Display
• Press the button until the desired fan speed • To display the set temperature (in °C) and
is achieved. timer delay setting (in hours).
5. Timer. 10. Transmission source
• Press the set button to select the switch • To transmit signals to the air conditioner.
timer of the air conditioner unit (the setting
range is between 1 to 10 hours).
5

OPERATING STATE AND FAULT TABLE
WIRELESS REMOTE CONTROL (UNIVERSAL BOARD)
COOLING : LED INDICATOR LIGHT DISPLAY HEATPUMP : LED INDICATOR LIGHT DISPLAY
{ON {/ zON or OFF  BLINKING
WIRED REMOTE CONTROL (UNIVERSAL BOARD)
Cooling / Heatpump Model
Error Code at 7 Segment Display Operation / Faulty Indication
Blink E1 Room sensor contact loose / short
Blink E2 Indoor coil sensor contact loose / short
Blink E3 Outdoor coil sensor contact loose / short
Blink E4 Compressor overload
Blink E5 Gas leak
Blink E6 Pump faulty
Blink Heat LED Outdoor defrost (for Heatpump only)
6
POWER TIMER SLEEP POWER TIMER HEAT
Operation / Faulty Indication
{Cool Mode
{{ Timer On
{{
Sleep Mode On
{{
Heat Mode
{Auto Mode - Cool
{{
Auto Mode - Heat

Continuously
{/ zFrost Prevention Mode

Once every 3 sec
Compressor Overload

Twice every 3
sec
Pump Fault

3 times every
3 sec
Gas Leak

4 times every
3 sec
Room / Indoor / Outdoor Coil
Sensor Contact Loose / Short
POWER TIMER SLEEP HEAT

7
WATER PUMP
The water pump will on if compressor is on during cooling cycle. The pump will remain on for at least 5
minutes after the compressor is off.
During mode change from cooling to non-cooling mode, the pump will on for minimum 5 minutes. During
defrost cycle, the pump will on and will on for another 5 minutes once the defrost cycle is terminated.
WATER LEVEL SWITCH
This normally close switch is to detect faults in water pump system. It will confirm for 30 seconds for switch
open and 60 seconds for switch close.
Once switch is confirmed open, it will force compressor to cut off. If the switch is closed within 5 minutes,
the compressor is allowed to cut in. If the switch does not close for more than 5 minutes, the system will
warn user regarding the fault, the compressor is not allowed to cut in. If the switch is confirmed opened
twice within 30 minutes, the system assumes there are faults.
PHASE SEQUENCER
The unit with Scroll Compressor can only rotate in one direction. For this reason, a protective device
(phase sequencer) is fitted to prevent incorrect wiring of the electrical phases. When the three phases are
not connected correctly, the phase sequencer operates, and the unit will not start. This devise is located in
the control box of the outdoor unit.
The following table shows the LED indicator light for phase sequencer under normal operation and fault conditions.
LED_P
(Red)
LED_R
(Yellow)
LED_S
(Yellow)
LED_T
(Yellow)
Normal Operation On - - -
Reverse Phase Blink Blink Blink Blink
S & T Phase Missing Blink - Blink Blink
T Phase Missing Blink - - Blink
S Phase Missing Blink - Blink -
R Phase Missing - - - -
Overload Blink - - -
Sensor Missing Blink On On On
Notes: 1. “-” means LED off.
2. When R phase missing, no LED or buzzer will indicate the error, but relay 71 (Common) and 81 (NO)
will cut off.
3. The unit will check the discharge sensor availability only during power up.
4. All errors can only recover through manual reset.

13. SERVICING AND MAINTENANCE
Warning: Disconnect from main supply before servicing the air conditioner
The unit is designed to give long life operation with minimum maintenance required. However, it should be
regularly checked and the following items should be given due attention.
Components Maintenance Procedures Recommended Schedule
Air Filter
(Indoor Unit)
1. Remove any dust adhering to the filter by using a
vacuum cleaner or wash in lukewarm water (below
40 C) with a neutral cleaning detergent.
2. Rinse the filter well and dry before placing it back onto
the unit.
3. Note: Never use gasoline, volatile substances or
chemicals to clean the filter.
At least once every 2 weeks.
More frequently if necessary.
Indoor Unit 1. Clean any dirt or dust on the grille or panel by wiping it
with a soft cloth soaked in lukewarm water (below
40 C) and a neutral detergent solution.
2. Note: Never use gasoline, volatile substances or
chemicals to clean the indoor unit.
At least once every 2 weeks.
More frequently if necessary.
Condense Drain
Pan & Pipe
1. Check the cleanliness and clean it if necessary.
2. Check the condensate water flow.
Every 3 months.
Indoor Fan Check if there is any abnormal noise. If necessary.
Indoor / Outdoor
Coil
1. Check and remove the dirt between the fins.
2. Check and remove any obstacles which hinder air flow
through the indoor or outdoor.
Every month.
Power Supply 1. Check the running current and voltage for indoor and
outdoor unit.
2. Check the electrical wiring and tighten the wire onto the
terminal block if necessary.
Every 2 months.
Every year.
Compressor No maintenance needed if refrigerant circuit remains
sealed. However, check for refrigerant leak at joint and
fitting.
Every 6 months.
Compressor Oil Oil is factory charged. Not necessary to add oil if circuit
remains sealed.
No maintenance required.
Fan Motor Oil All motors are pre-lubricated and sealed at factory. No maintenance required.
Pre Start Up Maintenance
(After Extended Shutdown)
- Inspect thoroughly and clean indoor and outdoor units.
- Clean or replace air filters.
- Clean condensates drain line.
- Clean clogged indoor and outdoor coils.
- Check fan imbalance before operation.
- Tighten all wiring connections and panels.
- Check for refrigerant leakage.
8

14. TROUBLESHOOTING
9
When a malfunction of the air conditioner unit is detected, immediately switch off the main power supply before
proceeding with the following troubleshooting procedures.
The following are common fault conditions and simple troubleshooting tips. If any other fault conditions which
are not listed occur, contact your nearest local dealer. DO NOT attempt to troubleshoot the unit by yourself.
No Fault conditions Possible causes / corrective actions
1 The air conditioner unit will not resume after
power failure.
xThe auto restart function is not functioning. Please
turn on the unit with the wireless / wired controller.
2 The compressor does not operate 3 minutes
after the air conditioner unit is started.
xProtection against frequent starting.
xWait for 3 or 4 minutes for the compressor to start
operating by it self.
3 The airflow is too slow or room cannot be
cooled sufficiently.
xThe air filter is dirty.
xThe doors and windows are opened.
xThe air suction and discharge of both indoor and
outdoor units are clogged or blocked.
xThe regulated temperature or temperature setting
is not low enough.
4 Discharge airflow has bad odor. xCigarettes, smoke particles, perfume and others,
which might have adhered onto the coil, may
cause odor.
xContact your nearest dealer.
5 Condensation on the front air grille of the indoor
unit.
xThis is caused by air humidity after an extended
period of operation.
xThe set temperature is too low. Increase the
temperature setting and operate the unit at high
fan speed.
6 Water flowing out from the air conditioner. xSwitch off the unit and contact your nearest
dealer. This might be due to tilted installation.
7 Hissing airflow sound from the air conditioner
unit during operation.
xLiquid refrigerant flowing into the evaporator coil.
8 The wireless controller display is dim. xThe batteries are discharged.
xThe batteries are not correctly inserted.
xThe assembly is not good.
9 Compressor operates continuously. xDirty air filter. Clean the air filter.
xTemperature setting too low (cooling). Use higher
temperature setting.
xTemperature setting too high (heating), Use lower
temperature setting.
10 No cool air comes out during cooling cycle, or
no hot air comes out during heating cycle.
xTemperature setting too high (cooling). Use lower
temperature setting.
xTemperature setting too low (heating). Use higher
temperature setting.
11 On heating cycle, warm air does not come out. xUnit is in defrost mode. Heating operation will
resume after defrost cycle ends.

15. EXPLODED VIEW AND PARTS LIST
UNIT - ACK - A/AR
NO. PARTS DESCRIPTION NO. PARTS DESCRIPTION
1 BASE PAN 18 HEXAGON BOLT
2 FAN MOTOR 19 DRAIN HOSE
3 FAN MOTOR BUSH 20 LEVEL SWITCH
4 PLAIN WASHER 21 COIL SUPPORT
5 FAN MOTOR WASHER 22 PARTITION
6 BUTTON COUPLING 23 SIDE PANEL FRONT
7 TURBO FAN 24 VALVE PLATE
8 TOP COUPLING 25 DRAIN CONNECTOR
9 FLAT WASHER 26 SIDE PANEL BACK
10 PLAIN WASHER 27 AIR GUIDE
11 SPRING WASHER 28 DRAIN PAN
12 HEXAGON BOLT 29 FIX BRACKET FRONT
13 HEXAGON BOLT 30 FIX BRACKET BACK
14 EVAPORATOR COIL 31 FAN COVER
15 DRAIN PUMP BRACKET 32 TERMINAL BOX
16 DRAIN PUMP 33 DRAIN PIPE
17 DRAIN PUMP BUSH 34 HANGER BRACKET A,B & C
10

PANEL ( WIRELESS REMOTE CONTROL ) - ACK – A/AR
NO PART DESCRIPTION NO. PART DESCRITION
1 FRONT PANEL 13 SWING MOTOR BRACKET
2 RECEIVER BRACKET 14 PANEL COVER
3 DISCHARGE HOUSING A 15 FIX PLATE
4 METAL LOUVER A 16 AIR INTAKE GRILLE
5 DISCHARGE HOUSING B 17 GRILLE LOCK
6 METAL LOUVER B 18 GRILLE LOCK BRACKET
7 DISCHARGE HOUSING D 19 IONIZER FILTER FRAME
8 LOUVER BRACKET 20 IONIZER FILTER
9 CRANK SHARF 21 AIR FILTER
10 CRANK CONNECTOR 22 AIR SWING CAP
11 CRANK CROSS 23 REMOTE CONTROL
12 SWING MOTOR
11

NO PART DESCRIPTION NO. PART DESCRITION
1 FRON PANEL 12 SWING MOTOR
2 AIR FILTER 13 SWING MOTOR BRACKET
3 DISCHARGE HOUSING A 14 PANEL COVER
4 METAL LOUVER A 15 FIX PLATE
5 DISCHARGE HOUSING C 16 AIR INTAKE GRILLE
6 AIR SWING CAP 17 GRILLE LOCK
7 DISCHARGE HOUSING D 18 GRILLE LOCK BRACKET
8 LOUVER BRACKET 19 IONIZER FILTER FRAME
9 CRANK SHARF 20 IONIZER FILTER
10 CRANK CONNECTOR 21 REMOTE CONTROL
11 CRANK CROSS 22 CARD REMOTE CONTROL
12
PANEL ( WIRELESS REMOTE CONTROL ) - ACK – A/AR

MODEL : A5CK 10C/CR
A5CK 15C/CR
A5CK 20C/CR
NO PART DESCRIPTION NO. PART DESCRITION
1 ASSY. BASE 14 BUSH, DRAIN PUMP
2 ASSY. CASING 15 ASSY. DRAIN PUMP SUPPORT BUCKET
3 ASSY. COIL 16 ASSY., ENDPLATE SUPPORT
4 COVER, FAN 17 CLIP, COIL SENSOR (6mm)
5BLOWER WHEEL, TURBO FAN FX330 TU
YAMAHA 18 TUBE, COIL SENSOR
6 PLATE, WIRE 19 BRACKET, COIL
7 MOTOR, ACK20C-501 HONG LU 20 COVER, TERMINAL
8 BUSH, FAN MOTOR 21 COVER, WIRE
9 BUSH, FAN MOTOR RING 22 CONNECTOR, DRAIN CK
10 ASSY., CONTROL BOX 23 HOSE, DRAIN CK
11 DRAIN PUMP PJV-0732 24 ASSY., COVER VALVE
12 LEVEL SWITCH/ FLOAT SWITCH FS-06122A 25 ASSY., DRAIN PAN
13 BUSH, WIRE NRID22XOD 36XT10.0-MODEL
CE/SB 26 BUSH, WIRE
13

PANEL : A5CK 10/15/20C/CR
NO PART DESCRIPTION NO. PART DESCRITION
1 FRAME 11 LINKAGE, COVER MOTOR
2 INTAKE GRILLE 12 ASSY, BRACKET RECEIVER (LED/SLM)
3 FILTER 13 AIR SWING MOTOR ASSY
4 GRILLE LOCK 14 CRANK CONNECTOR
5 DISCHARGE, FOAM 15 LOUVER HOLDER
6 DISCHARGE, FOAM LED 16 CRANK CROSS
7 DISCHARGE, FOAM SHORT 17 INSULATION LONG
8 LOUVER 18 INSULATION SHORT
9 LED LOUVER 19 INSULATION CORNER
10 LINKAGE, COVER
14

MODEL: A5LC 20C
No Description No Description
1 Assy, Base Pan 11 Front Panel, Left
2 Assy, Outdoor Coil 12 Service Panel
3 Motor Bracket 13 Terminal Cover Panel
4 Fan Motor 14 Assy, Control Panel
5 Fan Blade 15 Top Panel
6 Valve Bracket 16 Assy, Front Grille
7 Assy, Flare Valve 3 Ways 17 Plastic Handle
8 Assy, Flare Valve 2 Ways 18 Assy, Valve Cover
9 Back Panel, Right 19 Assy, Cap Tube
10 Compressor 20 Partition
15

MODEL: A5LC 25/28C
No Description No Description
1 Assy, Base Pan 11 Front Panel, Left
2 Assy, Outdoor Coil 12 Service Panel
3 Motor Bracket 13 Terminal Cover Panel
4 Fan Motor 14 Assy, Control Panel
5 Fan Blade 15 Top Panel
6 Valve Bracket 16 Assy, Front Grille
7 Assy, Flare Valve 3 Ways 17 Plastic Handle, Side
8 Assy, Flare Valve 2 Ways (ALC/A5LC25C) 18 Assy, Valve Cover
Assy, Flare Valve 3 Ways (ALC/A5LC28C) 19 Assy, Cap Tube
9 Back Panel, Right 20 Partition
10 Compressor 21 Plastic, Handle, Front
16

17
MODEL: A5LC 20CR
No Description No Description
1 Assy, Base Pan 12 Service Panel
2 Assy, Outdoor Coil 13 Terminal Cover Panel
3 Motor Bracket 14 Assy, Control Panel
4 Fan Motor 15 Top Panel
5 Fan Blade 16 Assy, Front Grille
6 Valve Bracket 17 Plastic Handle
7 Assy, Flare Valve 3 Ways 18 Assy, Valve Cover
8 Assy, Flare Valve 2 Ways 19 Assy, Cap Tube
9 Back Panel, Right 20 Assy, 4 Way Valve
10 Compressor 21 Partition
11 Front Panel, Left

18
MODEL: A5LC 25/28CR
No Description No Description
1 Assy, Base Pan 12 Service Panel
2 Assy, Outdoor Coil 13 Terminal Cover Panel
3 Motor Bracket 14 Assy, Control Panel
4 Fan Motor 15 Top Panel
5 Fan Blade 16 Assy, Front Grille
6 Valve Bracket 17 Plastic Handle, Side
7 Assy, Flare Valve 3 Ways 18 Assy, Valve Cover
8 Assy, Flare Valve 2 Ways (ALC/A5LC25CR) 19 Assy, Cap Tube
Assy, Flare Valve 3 Ways (ALC/A5LC28CR) 20 Assy, 4 Way Valve
9 Back Panel, Right 21 Partition
10 Compressor 22 Plastic Handle, Front
11 Front Panel, Left

19
MODEL: A5LC 35/40/50C/CR
No Description No Description
1 Assy, Base Pan 9 Top Panel
2 Assy, Flare Valve 10 Assy, Coil
3 Assy, Flare Valve 11 Bracket, Fan Motor
4 Panel, Partition 12 Side Panel, Left
5 Compressor 13 Fan Motor
6 Service Panel 14 Fan Blade
7 Accumulator 15 Assy, Front Pnel
8 Back Panel 16 Plate, Flare Valve