Mitsubishi Heavy Industries SRK20MA-S User manual

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Mitsubishi Heavy Industries Air Conditioners
Technical Manual
Manual Number: 2011 No. W2-01
Variable Frequency Wall Mounted Type
Room Air Conditioners
(Split system, heat pump type)
SRK20MA-S/SRC20MA-S
SRK25MA-S/SRC25MA-S
SRK35MA-S/SRC35MA-S
SRK50MA-S/SRC50MA-S
(R410A Refrigerant Used)
MITSUBISHI HEAVY INDUSTRIES, LTD.

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Table of Contents
1. GENERAL INFORMATION…………..……………………….……1
1.1 Features……………………………………..……………………..…1
1.2 Model identification………………………………………………1
2 MODEL SELECTION…………………………………………………2
2.1 Model function..…………..…….……..………………………..……2
2.2 Range of usage……………………………………………..………6
2.3 Outline drawing……………………………..……………………..…6
2.4 Cooling cycle system diagram…….………………..…………...…8
2.5 Performance curve……………………………………………………9
3 ELECTRICAL WIRING DIAGRAM……………………………….10
4 NAME OF EACH PART AND ITS FUNCTION………….12
4.1 Name of each part………………………….......…………………....15
4.2 Emergency switch………………………….......…………………....15
4.3 Automatic restart……………..…………..………………………..15
4.4 Key lock………….…………..……..……………………………..15
4.5 CLEAN operation………………...……..…………………………..15
4.6 SLEEP operation……..……..…………………………….……..16
4.7 Timing off………...............................................................16
4.8 Timing on ...........................................................................17
4.9 Programmed timer........................................................................17
4.10 Current time setting.....................................................................18
4.11 HI POWER operation....................................................................18
4.12 JET operation.........................................................................18
4.13 POWER SAVE operation.................................................................19
4.14 Air direction adjustment..............................................................19
4.15 Area setting…......................................................................20
4.16 Installation location setting.............................................................20
4.17 Outline of automatic operation..................................................20

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4.18 Outline of drying operation..................................................21
4.19 Outline of defrosting operation.................................................21
4.20 Outline of vertical and horizontal flaps control................................23
4.21 Outline of electronic expansion valve (EEV) control.....................24
4.22 Outline of compressor control.........................................24
4.23 Outline of outdoor fan control.........................................24
4.24 Outline of indoor fan control.........................................25
5 INSTALLATION................................................................................27
5.1 Selection of installation location.................................................29
5.2 Installation of indoor unit..................................................................30
5.3 Installation of outdoor unit...............................................................33
5.4 Pipe connection.................................................................................33
5.5 Precautions for wireless remote controller operation.........................35
5.6 Standard running data........................................................................36
6 MAINTENANCE................................................................................37
6.1 Electrical parts failure diagnosis method.....................................37
6.2 Servicing.............................................................................................58
7 SERVICING MANUAL.......................................................................59
8 MOUNT ASSEMBLY…………………………...........................74
8.1 Indoor unit.........................................................................................74
8.2 Outdoor unit......................................................................................90

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1 GENERALINFORMATION
1.1 Features
(1) Inverter
● Heating/cooling
The rotate speed of the compressor is changed steplessly in relation to varying load, and is linked
with the fans of indoor and outdoor units controlled by the changes of frequency, thus controls
the power.
● Allowing quick heating/cooling operation during start-up period.
The room temperature is kept constant through fine-tuned control after the machine is stabilized.
(2) Fuzzy control: According to the fuzzy control technology, the indoor temperature and humidity,
etc. are obtained through dynamic analysis to accurately regulate the rotate speeds
of the compressor and the fan to realize precise temperature control.
(3) Comfort: 3D air blowing, sleep mode, and other air blowing modes.
(4) Humanization: Room temperature displaying, key lock, concentrated/area air blowing.
(5) Life: Actual service life: over 20,000 hours; Working life: over 100,000 hours; On/off of relay:
over 50,000 times; Continuous on of LED: over 50,000 hours; On/off of emergency switch:
over 10,000 times.
(4) Self diagnosis function: We will continuously provide the best services for our customers through
devices judging abnormal operation, as follows:
Indoor indication
Error
RUN lamp
TIMER lamp
Temp.
indication
Indoor
unit
Sensors
Indoor heat exchanger sensor error
1 time/8 sec.
ON
06
Indoor inlet air (room temp.) sensor error
2 times/8 sec.
--
Others
Indoor fan motor error
6 times/8 sec.
16
Display communication error
--
--
00
Outdoor unit
Sensors
Outdoor temp. sensor error
Continuous
flashing
1 time/8 sec.
38
Outdoor heat exchanger (liquid pipe)
sensor error
2 times/8 sec.
37
Vent-pipe sensor error
4 times/8 sec.
39
Others
Power cut for current protection
ON
1 time/8 sec.
42
Failure of outdoor unit
2 times/8 sec.
59
Current safety
3 times/8 sec.
58
Failure of power module
4 times/8 sec.
51
Compressor over heat protection
5 times/8 sec.
36
Serial signal transmission error
6 times/8 sec.
05
Outdoor fan motor error
7 times/8 sec.
48
Cool room high pressure protection
control
Continuous
flashing
35
Controllable silicon voltage error
5 times/8 sec.
ON
47
Cooling circulation system protection
7 times/8 sec.
57
Locked-rotor/rotor lock
2 times/8 sec.
2 times/8 sec.
60
The air conditioner indicates the error of the indoor and outdoor sensors (thermistors) only when it is
in the stop mode. Error indication is removed after restart.
1.2 Model identification
For example:
R410A Refrigerant used
Master pattern change code
Master pattern
Capacity
Wall mounted type (C is the code for outdoor unit.)
Split type room air conditioner

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2 MODEL SELECTION
2.1 Model function
2.1.1 Model: SRK20MA–S (Indoor unit)
SRC20MA–S (Outdoor unit)
Item
Unit
Indoor unit SRK20MA–S
Outdoor unit SRC20MA–S
Net weight
kg
10
32
Machine
dimension
mm
798×230×294
780×290×540
Package
dimension
Length×
Width ×Height
850×365×310
920×380×590
Color
White
Ash-colored
Fan
Through-flow type, AS resin +
glass fiber
Axial flow type, AS resin + glass
fiber (embedded damping spindle
sleeve)
Air flow
m3/h
600
1800
Noise in cool
room
dB(A)
Hi/Me/Lo: 37/27/21(completely
mute, SPL)
43(completely mute, SPL)
Noise in warm
room
dB(A)
Hi/Me/Lo: 37/28/24(completely
mute, SPL)
45(completely mute, SPL)
Fan motor
Nominal value
33W, DC motor, insulation grade E
24W, DC motor, insulation grade E
Power of motor
W (reference
value)
19
20
Power of electric
control
W (reference
value)
2
7.5
Power supply and
power cord
Single-phase, 220V, 50Hz and 3-core, 1.0mm2, 250V, 10A, 2m, w/o plug
Heat exchanger
Spiral, hydrophilic, 4-folded,
15-section, 2-row, 528-fin, 1-2
circuit
Spiral, hydrophilic, 20-section,
1-row, 621-fin, 2-1 circuit
Compressor
Nominal value
THACOM RM-B5077MDE2, 527W, DC frequency conversion
compressor, insulation grade E
Refrigerating
machine oil
ml
300, DIAMOND FREEZE MA68
Refrigerant
controller
Electronic expansion valve (Φ1.5mm) + hush pipe
Refrigerant
g
R-410A, 900g, addition/reduction not needed within the use range of 15m
Operating
pressure limit
Mpa
Max.: 4.15, Min.: 1.47
Air filters
Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter
Accessories and
quantity
Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and
installation manual 1, remote controller 1, filter components 2, outdoor unit
1, Drain elbow 1, Water shutoff plug 1
Operation control
devices
Wireless remote controller, electronic thermostat controlling room
temperature, microcomputer controlling defrosting
Safety devices
Serial signal protection, fan error protection, compressor over heat
protection, high voltage protection, over current protection, etc.
* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead
room.
Item
Unit
Rating cooling
Rating heating
Capacity
W
2000
2700
Power
W
450
600
Energy efficiency ratio
4.44
4.50
Energy efficiency grade
Grade A (European norm)
Note (1) The data are measured at the following conditions. The pipe length is 5m.
Item
Operation
Indoor air temperature
Outdoor air temperature
Standards
DB
WB
DB
WB
Cooling
27℃
19℃
35℃
24℃
Heating
20℃
—
7℃
6℃
Low temperature Heating
20℃
—
2℃
1℃
(2) The operation data are applied to the 220Vdistricts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)

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2.1.2 Model: SRK25MA–S (Indoor unit)
SRC25MA–S (Outdoor unit)
Item
Unit
Indoor unit SRK25MA–S
Outdoor unit SRC25MA–S
Net weight
kg
10
32
Machine
dimension
mm
798×230×294
780×290×540
Package
dimension
Length×
Width ×Height
850×365×310
920×380×590
Color
White
Ash-colored
Fan
Through-flow type, AS resin +
glass fiber
Axial flow type, AS resin + glass
fiber (embedded damping spindle
sleeve)
Air flow
m3/h
600
1800
Noise in cool
room
dB(A)
Hi/Me/Lo: 37/27/22(completely
mute, SPL)
44(completely mute, SPL)
Noise in warm
room
dB(A)
Hi/Me/Lo: 38/29/23(completely
mute, SPL)
45(completely mute, SPL)
Fan motor
Nominal value
33W, DC motor, insulation grade E
24W, DC motor, insulation grade E
Power of motor
W (reference
value)
19
20
Power of electric
control
W (reference
value)
2
7.5
Power supply and
power cord
Single-phase, 220V, 50Hz and 3-core, 1.0mm2, 250V, 10A, 2m, w/o plug
Heat exchanger
Spiral, hydrophilic, 4-folded,
15-section, 2-row, 528-fin, 1-2
circuit
Spiral, hydrophilic, 20-section,
1-row, 621-fin, 2-1 circuit
Compressor
Nominal value
THACOM RM - B5077MDE2, 527W, DC frequency conversion
compressor, insulation grade E
Refrigerating
machine oil
ml
300, DIAMOND FREEZE MA68
Refrigerant
controller
Electronic expansion valve (Φ1.5mm) + hush pipe
Refrigerant
g
R-410A, 900g, addition/reduction not needed within the use range of 15m
Operating
pressure limit
Mpa
Max.: 4.15, Min.: 1.47
Air filters
Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter
Accessories and
quantity
Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and
installation manual 1, remote controller 1, filter components 2, outdoor unit
1, water elbow 1, Water shutoff plug 1
Operation control
devices
Wireless remote controller, electronic thermostat controlling room
temperature, microcomputer controlling defrosting
Safety devices
Serial signal protection, fan error protection, compressor over heat
protection, high voltage protection, over current protection, etc.
* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead
room.
Item
Unit
Rating cooling
Rating heating
Capacity
W
2500
3200
Power
W
680
790
Energy efficiency ratio
3.68
4.05
Energy efficiency grade
Grade A (European norm)
Note (1) The data are measured at the following conditions. The pipe length is 5m.
Item
Operation
Indoor air temperature
Outdoor air temperature
Standards
DB
WB
DB
WB
Cooling
27℃
19℃
35℃
24℃
Heating
20℃
—
7℃
6℃
Low temperature Heating
20℃
—
2℃
1℃
(2) The operation data are applied to the 220Vdistricts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)

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2.1.2 Model: SRK35MA–S (Indoor unit)
SRC35MA–S (Outdoor unit)
Item
Unit
Indoor unit SRK35MA–S
Outdoor unit SRC35MA–S
Net weight
kg
10.5
35
Machine
dimension
mm
798×230×294
780×290×540
Package
dimension
Length×
Width ×Height
850×365×310
920×380×590
Color
White
Ash-colored
Fan
Through-flow type, AS resin +
glass fiber
Axial flow type, AS resin + glass
fiber (embedded damping spindle
sleeve)
Air flow
m3/h
600
1870
Noise in cool
room
dB(A)
Hi/Me/Lo: 39/31/23(completely
mute, SPL)
46(completely mute, SPL)
Noise in warm
room
dB(A)
Hi/Me/Lo: 41/34/23(completely
mute, SPL)
50(completely mute, SPL)
Fan motor
Nominal value
33W, DC motor, insulation grade E
24W, DC motor, insulation grade E
Power of motor
W (reference
value)
19
20
Power of electric
control
W (reference
value)
2
7.5
Power supply and
power cord
Single-phase, 220V, 50Hz and 3-core, 1.0mm2, 250V, 10A, 2m, w/o plug
Heat exchanger
Parent: Spiral, hydrophilic,
4-folded, 15-section, 2-row,
528-fin, Pf1.2
Child: Spiral, hydrophilic,
4-section, 1-row, 452-fin, Pf1.4
Spiral, hydrophilic, 20-section,
2-row, 1221-fin, 2-1 circuit, Pf1.4
Compressor
Nominal value
THACOM RM - B5077MDE2, 527W, DC frequency conversion
compressor, insulation grade E
Refrigerating
machine oil
ml
300, DIAMOND FREEZE MA68
Refrigerant
controller
Electronic expansion valve (Φ1.5mm) + hush pipe
Refrigerant
g
R-410A, 900g, addition/reduction not needed within the use range of 15m
Operating
pressure limit
Mpa
Max.: 4.15, Min.: 1.47
Air filters
Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter
Accessories and
quantity
Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and
installation manual 1, remote controller 1, filter components 2, outdoor unit
1, Drain elbow 1, Water shutoff plug 1
Operation control
devices
Wireless remote controller, electronic thermostat controlling room
temperature, microcomputer controlling defrosting
Safety devices
Serial signal protection, fan error protection, compressor over heat
protection, high voltage protection, over current protection, etc.
* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead
room.
Item
Unit
Rating cooling
Rating heating
Capacity
W
3500
4000
Power
W
960
1100
Energy efficiency ratio
3.65
3.64
Energy efficiency grade
Grade A (European norm)
Note (1) The data are measured at the following conditions. The pipe length is 5m.
Item
Operation
Indoor air temperature
Outdoor air temperature
Standards
DB
WB
DB
WB
Cooling
27℃
19℃
35℃
24℃
Heating
20℃
—
7℃
6℃
Low temperature Heating
20℃
—
2℃
1℃
(2) The operation data are applied to the 220Vdistricts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)

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2.1.2 Model: SRK50MA–S (Indoor unit)
SRC50MA–S (Outdoor unit)
Item
Unit
Indoor unit SRK50MA–S
Outdoor unit SRC50MA–S
Net weight
kg
10.5
43
Machine
dimension
mm
798×230×294
850×290×640
Package
dimension
Length×
Width ×Height
850×365×310
990×395×700
Color
White
Ash-colored
Fan
Through-flow type, AS resin +
glass fiber
Axial flow type, AS resin + glass
fiber (embedded damping spindle
sleeve)
Air flow
m3/h
720
2400
Noise in cool
room
dB(A)
Hi/Me/Lo: 44/34/25(completely
mute, SPL)
50(completely mute, SPL)
Noise in warm
room
dB(A)
Hi/Me/Lo: 48/34/25(completely
mute, SPL)
50(completely mute, SPL)
Fan motor
Nominal value
33W, DC motor, insulation grade E
24W, DC motor, insulation grade E
Power of motor
W (reference
value)
19
20
Power of electric
control
W (reference
value)
2
7.5
Power supply and
power cord
Single-phase, 220V, 50Hz and 3-core, 1.5mm2, 250V, 16A, 2m, w/o plug
Heat exchanger
Parent: Spiral, hydrophilic,
4-folded, 15-section, 2-row,
528-fin, Pf1.2
Child: Spiral, hydrophilic,
4-section, 1-row, 452-fin, Pf1.4
Spiral, hydrophilic, 24-section,
2-row, 1334-fin, 4-1 circuit, Pf1.2
Compressor
Nominal value
THACOM RM - B5077MDE2, 527W, DC frequency conversion
compressor, insulation grade E
Refrigerating
machine oil
ml
300, DIAMOND FREEZE MA68
Refrigerant
controller
Electronic expansion valve (Φ1.5mm) + hush pipe
Refrigerant
g
R-410A, 1250g, addition/reduction not needed within the use range of 15m
Operating
pressure limit
Mpa
Max.: 4.15, Min.: 1.47
Air filters
Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter
Accessories and
quantity
Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and
installation manual 1, remote controller 1, filter components 2, outdoor unit
1, Drain elbow 1, Water shutoff plug 1
Operation control
devices
Wireless remote controller, electronic thermostat controlling room
temperature, microcomputer controlling defrosting
Safety devices
Serial signal protection, fan error protection, compressor over heat
protection, high voltage protection, over current protection, etc.
* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead
room.
Item
Unit
Rating cooling
Rating heating
Capacity
W
5000
5800
Power
W
1560
1600
Energy efficiency ratio
3.21
3.63
Energy efficiency grade
Grade A (European norm)
Note (1) The data are measured at the following conditions. The pipe length is 5m.
Item
Operation
Indoor air temperature
Outdoor air temperature
Standards
DB
WB
DB
WB
Cooling
27℃
19℃
35℃
24℃
Heating
20℃
—
7℃
6℃
Low temperature Heating
20℃
—
2℃
1℃
(2) The operation data are applied to the 220Vdistricts respectively.
(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.
(Purging is not required even for the short piping.)

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2.2 Range of usage
Please use the air conditioners within the following range of usage, otherwise the protector will be
triggered.
Cooling Operation
Heating Operation
Outdoor temperature
About 18℃~43℃
About -15~24℃
Indoor temperature
About18℃~32℃
About below 30℃
Indoor humidity
About below 80%
20~50 Models
Max. piping one-way length
Within 15 m
Vertical height difference
Within 5 m
Additional R410A Refrigerant
Not required
Voltage
Rating ±10%
Starting voltage
At least 85% of rating
Switching frequency
Max. 10 times per hour
Time interval between stop and start
Min. 3 min
2.3 Outline drawing
(1) Indoor unit: MA-S Series Unit: mm

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(2) Outdoor unit: SRC20MA-S/ SRC25MA-S/ SRC35MA-S Unit: mm
(3) Outdoor unit: SRC50-MA-S Unit: mm
Drainage pipes
Junction box
Operation valve (Liquid)
Flare connecting
Operation valve (Gas)
Flare connecting
Drain holes
Terminal block
Operation valve (Liquid)
Flare connecting
Operation valve (Gas)
Flare connecting

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2.4 Cooling cycle system diagram
Models: MA-S Series
Note (1)……line is piping for site construction.
Indoor unit
Outdoor unit
Circulation of cooling
Circulation of heating
Flare connecting
Operation valve (Gas)
Outdoor air
temp. sensor
Air heat
exchanger
Heat exchanger
sensor
Gas liquid
separator
Compressor
Discharge pipe sensor
4-way valve
Check joint
GaspipeNote(1)
model
Air heat
exchanger
Inlet air temp.
sensor
Air heat exchanger
sensor
Liquid pepe
Flare connecting
Filter
Electronic expansion valve
Hush pipe
Hush pipe
Operation valve (Liquid)
Refrigerant inlet pipe
Refrigerant outlet
pipe
model

- 10 -
2.5 Performance curve
The cooling and heating capacities are measured in the following conditions. The actual capacity can
be obtained with the following formula.
Actual capacity = Rating capacity x Correction factor
(1) Capacity correction according to indoor and outdoor temperatures:
Outdoor air W.B. temperature (°C W.B.) ISO-T1 Standard
⑵Capacity correction according to one way length of refrigerant piping:
It is necessary to correct the cooling and heating capacity according to the one way length of refrigerant
piping.
Piping length (m)
7
10
15
Cooling
1.0
0.99
0.975
Heating
1.0
1.0
1.0
⑶Capacity correction according to frosting on outdoor heat exchanger during heating:
In additions to the foregoing corrections (1) and (2), the heating capacity also needs to be corrected
according to the frosting on the outdoor heat exchanger.
Air inlet temperature
of outdoor unit
-10
-9
-7
-5
-3
-1
1
3
5
Frosting correction
factor
0.95
0.94
0.93
0.91
0.88
0.86
0.87
0.92
1.00
⑷Example of cooling and heating capacity calculation:
The actual cooling capacity of model SRK50MA-S with the one way piping length of 25m at the
indoor wet-bulb temperature of 19℃and outdoor dry-bulb temperature of 35℃in summer or indoor
dry-bulb temperature of 20℃, outdoor dry-bulb temperature of 1℃and indoor wet-bulb temperature of
-1℃in winter is
Actual cooling capacity = 5000 x 1.0 x 0.95 ≈ 4750W
Cooling
Heating
Accommodation
Correction factor of cooling & heating
capacity in relation to temperature
Cooling operation
Heating operation
Indoor air D.B.
temperature
Outdoor air D.B.
temperature
Indoor air W.B. temperature (°C W.B) ISO-T1 Standard

- 11 -
Nominal cooling Temp. correction Piping length
capacity factor correction factor
Actual heating capacity = 5800 x 0.81 x 0.95 x 0.86 ≈ 3838W
Nominal heating Temp. correction Piping length Frosting
capacity factor correction factor correction factor

- 12 -
3 ELECTRICALWIRING DIAGRAM
3.1 Circuit diagram: 20, 25, 35MA-S

- 13 -
3.2 Circuit diagram: 50MA-S

- 14 -
4 NAME OF EACH PARTAND ITS FUNCTION
4.1 Name of each part
Indoor unit
Suctions air in the room
Wireless remote controller
Air filter
filtere
Page 19
Filter
filtere
Indoor fan
filtere
Power switch
filtere
Vent
Air blows from here.
Up/down air direction flap
Page 11
Left/right air direction flap
Page 11
Drainage pipe
Drains water removed from air
Refrigerant pipe joint and electric wire
Outdoor unit
Accessories
Air inlet
Vent
(on the side and back)
Batteries
Wireless remote controller
Filter retainer (2 pcs)
Lysozyme filter and
antibacterial deodorizing filter
Indication section of A/C and signal receiver of remote controller
Air inlet panel
Draws in the indoor air.
Removes dust or dirt from the inlet air
Room temperature detector
filtere

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Indication section of air conditioner
RUN lamp (green)
ON during running
Heat-retaining
Running
Stop
1.5 sec.
0.5 sec.
ON during HI POWER/JET running
TIMER lamp (yellow)
ON during timing operation
HI POWER/JET lamp (green)
Receiving part of remote controller
Receives signals from remote controller
ON/OFF button
Press this button to begin
running; press it again to stop
running.
POWER SAVE lamp (green)
ON during Power Save running
Temp. displaying lamp (olivine)
It displays the room temperature or
set temperature. (Each time the
remote controller is pressed, the
temperature set with the remote
controller flashes for 10 seconds,
and then the room temperature is
displayed.
Opening the air inlet grille
Putyourhands on theindentationsonbothsides,raise thegrilletowardsyourself, and stopattheopening position of
about 60°.
Closing the air inlet grille
Gently push both sides and then gently push the central portion.
Removing and mounting the air inlet grille
To remove the air inlet grille to clean the inside, open it
at the position of about 65°and pull it towards yourself
to remove the grille.
To mount the air inlet grille, insert the mounting arm
onto the pin roll and close the grille.

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Operation and indication section for remote control
Operation section
FAN SPEED button
Each time this button is pressed,
■displaying changes in order.
HI POWER button
This button is used to change
the HI POWER mode.
TEMP button
This button is used to set the room
temp. (or select the current time
and set time for timing operation.)
TIMER ON button
This button is used to select
the Timing ON operation.
SLEEP button
Press this button to switch to
the SLEEP operation.
CLEAN button
Press this button to switch to
the CLEAN mode.
POWER SAVE button
Press this button to switch to the
POWER SAVE mode.
Displaying section
SLEEP indicator
Appears in the SLEEP mode
HI POWER indicator
■is used to indicate the HI POWER mode
TEMP indicator
Displays the set temperature
(No temperature is displayed in
the AUTO mode.
FAN SPEED indicator
■is used to indicate the fan speed set.
CLEAN indicator
Appears in the CLEAN mode
KEY LOCK indicator
Appears in the CLEAN mode
Transmission method
MODE button
Each time this button is pressed, ■
displaying changes in order.
ON/OFF (luminous) button
Press this button to begin running;
press it again to stop running.
Up/Down air direction button
Press this button and the air flap begins
to swing upwards and downwards.
Left/Right air direction button
Press this button and the air flap begins to
swing to the left and the right.
AREA button
Press this button to set the air
regulation area in the room.
TIMER OFF button
This button is used to select the
Timing OFF operation.
ACL switch
Used to reset the microcomputer
CANCEL/KEY LOCK button
Press this button to cancel Timing ON/OFF
and SLEEP operations; press and hold it for 3
seconds to lock the functional keys.
Timing ON/ Timing OFF indicator
Appears in the Timing ON/ Timing OFF mode
Power Save indicator
Indicates the POWER SAVE mode
MODE indicator
■is used to indicate the mode selected:
[AUTO/ COOLING/ HEATING/ DRYING/ BLOW]
TIME indicator
Displays the current time or the set time of the timer
AIR FLOW indicator
Displays the swinging mode of the flap
AREA indicator
Displays the air regulation area in the room
When the remote controller is pointed at the air conditioner, press a button on the remote controller and the signal will be
transmitted to the air conditioner. When the signal is received correctly, the air conditioner will issue the receiving sound. The
effective linear distance of transmission of the remote controller is 5 meters. The transmission head of the remote controller
should be pointed at the receiving head, otherwise, the receiving may be impacted.
●The above figure shows all
control contents for convenient
explanation. However, in actual
use, only related contents are
displayed.

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4.2 Emergency switch:
(1) When the remote controller is not used, the emergency operation switch “ON/OFF” button
can be used to turn on/off the machine.
(2) Press the “ON/OFF” button to begin operation. Press it
again to stop.
(3) Operation items:
● Operating mode: Automatic
● Fan speed: Automatic
● Air direction: Automatic
(4) Note:
Press and hold it for over 5 seconds to set to the cooling mode automatically.
4.3 Automatic restart due to power cut:
(1) This function can rapidly record the operation state immediately before the air conditioner is
switched off due to power failure, and will resume operation automatically after the power
supply is restored.
(2) This function is set to Active by default.
(3) Operation state memorized immediately before power cut includes:
● Indoor operation switching (cool room · warm room · drying · automatic · air flow, stop)
● Air flow
● Power Save
● Set temperature
● Air direction
(4) After automatic restart due to power cut, the following settings will be canceled:
Timing operation, HI POWER operation, CLEAN operation
(5) Priority of start:
Compressor 3 min. delayed start control > Automatic restart due to power cut
4.4 Key lock:
(1) The key lock setting prevents misoperation.
(2) Press and hold the KEY LOCK button for over 3 seconds and will appear
on the remote controller, which means the function is enabled; press and hold
the KEY LOCK button for over 3 seconds and on the remote controller
will disappear, which means the function is disabled
(3) When the function is enabled, only the ON/OFF button can be operated, and
the settings of temperature, air flow, air direction, etc. can’t be changed.
(4) When the function is enabled in the JET/ HI POWER operating mode, the
operation and action are valid before the air conditioner stops and become
invalid when the air conditioner operates again.
(5) The key lock function can’t be set in the CLEAN operation and various timing operations.
4.5 CLEAN operation:
(1) CLEAN operation: In the automatic, cooling and drying operating modes, when the
air conditioner is turned off, the fan of the indoor unit will continue to run for 30
minutes to dry the moisture in the indoor unit and inhibit the growth of mould and
bacteria. However, mould, bacteria, stain, etc. attached can’t be removed.
(2) Press the CLEAN button on the remote controller and will appear, which
means the CLEAN function is enabled; press it again and will disappear,
which means the CLEAN operation is disabled.
(3) After the CLEAN function is enabled, in the automatic/cooling/drying mode, press
the ON/OFF button to stop the operation of the air conditioner. In such case, the
RUN lamp will go off; the CLEAN indicator on the remote controller will light up; and the
CLEAN operation will run for about 30 minutes.
(4) During the CLEAN operation, press the ON/OFF button and the CLEAN operation will stop.
(5) According to the relative humidity, the rotate speed of the fan will be selected automatically
(including 3 rotate speeds) and will not be changed during the operation.
(6) When Air Flow, Timing On and SLEEP Operation stop, the CLEAN operation can’t run.
(7) During the CLEAN operation, press the SLEEP button and the CLEAN operation will be
switched to the SLEEP operation.
(8) The CLEAN function is disabled by default. Users need to set it according to the above steps.
ON/OFF button of the equipment
CLEAN