Mitsubishi Heavy Industries SRK20MA-S, SRC20MA-S, SRK25MA-S, SRC25MA-S, SRK35MA-S Technical 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 GENERAL INFORMATION

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.

Indoor inlet air (room temp.) sensor error

2 times/8 sec.

Others

Indoor fan motor error

6 times/8 sec.

Display communication error

Outdoor unit

Sensors

Outdoor temp. sensor error

Continuous

flashing

1 time/8 sec.

Outdoor heat exchanger (liquid pipe) sensor error

2 times/8 sec.

Vent-pipe sensor error

4 times/8 sec.

Others

Power cut for current protection

1 time/8 sec.

Failure of outdoor unit

2 times/8 sec.

Current safety

3 times/8 sec.

Failure of power module

4 times/8 sec.

Compressor over heat protection

5 times/8 sec.

Serial signal transmission error

6 times/8 sec.

Outdoor fan motor error

7 times/8 sec.

Cool room high pressure protection control

Continuous

flashing

Controllable silicon voltage error

5 times/8 sec.

Cooling circulation system protection

7 times/8 sec.

Locked-rotor/rotor lock

2 times/8 sec.

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

Machine

dimension

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)

Power of electric

control

W (reference

value)

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

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

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

2000

2700

Power

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

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

Machine

dimension

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)

Power of electric

control

W (reference

value)

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

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

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

2500

3200

Power

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

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃ — 2℃

1℃

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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

10.5

Machine

dimension

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)

Power of electric

control

W (reference

value)

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

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

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

3500

4000

Power

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

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃ — 2℃

1℃

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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

10.5

Machine

dimension

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)

Power of electric

control

W (reference

value)

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

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

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

5000

5800

Power

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

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃ — 2℃

1℃

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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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- 8 -

(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

Gas pipe Note (1)

model

Air heat

exchanger

Inlet air temp.

sensor

Air heat exchanger

sensor

Liquid pepe

Flare connecting

Filter

Electronic expansion valve

Hush pipe

Operation valve (Liquid)

Refrigerant inlet pipe

Refrigerant outlet

pipe

model

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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

⑵ Capacity 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)

Cooling

1.0

0.99

0.975

Heating

1.0

⑶ Capacity 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

⑷ Example 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

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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

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3 ELECTRICAL WIRING DIAGRAM

3.1 Circuit diagram: 20, 25, 35MA-S

- 13 -

3.2 Circuit diagram: 50MA-S

- 14 -

4 NAME OF EACH PART AND ITS FUNCTION

4.1 Name of each part

Indoor unit

Suctions air in the room

Wireless remote controller

Air filter

Page 19

Filter

Indoor fan

Power switch

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

- 15 -

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

Put your hands on the indentations on both sides, raise the grille towards yourself, and stop at the opening 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.

- 16 -

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.

- 17 -

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

- 18 -

4.6 SLEEP operation:

(1) SLEEP operation: This function prevents the temperature in the cooling operation from

becoming too low and the temperature in the heating operation from

becoming too high; regulates the room temperature automatically as

time goes by; and stops automatically after the time set. (2) Operation method: ① If the SLEEP button is pressed during the operation of the air

conditioner, and the run time, such as , will appear. There are 11 options, including 1-10 hours (interval of 10 hours) and OFF.

② If the SLEEP button is pressed when the air conditioner is in the

stop mode, the air conditioner will execute the previous operation settings and stop after the time set.

(3) Making correction based on the set temperature and regulating the

room temperature automatically: ① During cooling operation: Beginning (-1℃), 1 hour later (±0℃), 2 hours later (+1℃); ② During heating operation: Beginning (-1℃), 30 minutes later (-2℃), 1 hour later (-1℃), 2 hours later (-6℃); 4 hours

later (-3℃)

(4) The set time of SLEEP operation can be changed with the SLEEP button at any time. Since

the remote controller receives the change signal, the air conditioner continues to run

according to the changed set time. (5) When the operation switch change signal is received during the SLEEP operation, the air

conditioner will control the sleep setting according to the operation switching and the

temperature correction value in the elapsed time will be retained.

(6) When the set temperature change signal is received during the SLEEP operation, the

temperature correction value will be recalculated.

(7) When the air conditioner is set to automatic control (fuzzy automatic) and the indoor

operating mode (cool room · drying · warm room) is set, the SLEEP operation begins. The

change of cool room · drying · warm room state arising from the automatic control (fuzzy

automatic) is made only when the set temperature is changed. (In other words, the operating

mode judgment according to the operation judgment timing is not executed.)

(8) Priority of sleep timing operation ① Set temperature correction: HI POWER operation > Setting correction temperature ② Timing: Sleep timing run > HI POWER run

4.7 Timing OFF:

(1) Timing OFF: The timing OFF operation begins when the Timing OFF

signal is received from the remote controller and stops after the set time. (2) Operation method: ① When the air conditioner is in the stop mode, press the ON/OFF

button;

② When the air conditioner is running, press the TIMER OFF button

and the Timing OFF indicator will flash;

③ Press the or button to set the OFF time (unit: 10

minutes);

④ Within 60 seconds, press the TIMER OFF button and the indicator

will change from flashing to a fixed state. The setting is finished;

⑤ The TIMER lamp (yellow) of the indoor unit lights up. (3) Use the TIMER OFF button to set a new Timing OFF time at any time. (4) During the Timing OFF operation, all setting change signals from the remote controller are

accepted.

(5) During the Timing OFF operation, when the Timing ON signal is received, the operation will

become the programmed timing operation and the remaining Timing OFF time will be retained.

(6) During the Timing OFF operation, when the Sleep signal is received, the Timing OFF

operation will be canceled (and the remaining time will be canceled too) and the operation will be switched to the SLEEP operation. (In other words, the SLEEP operation can’t be used with the Timing OFF function.)

(7) To cancel the Timing OFF function, press the Cancel button and the TIMER lamp will go

off.

Sleep timing

Timing OFF

- 19 -

4.8 Timing ON:

(1) Timing ON: The air conditioner begins to detect the room temperature 60 minutes before

the set time and commences operation 5-60 minutes in advance according to the difference between the room temperature and the set temperature to make the room temperature reach the best value at the set time.

(2) Operation method:

① To set the Timing ON operation, whether the air conditioner is running is not considered.

② Press the TIMER ON button and the Timing ON lamp will flash;

③ Press the or button to set the ON time (unit: 10 minutes);

④ Within 60 seconds, press the TIMER ON button and the lamp will change from flashing

to a fixed state. The setting is finished;

⑤ The TIMER lamp (yellow) of the indoor unit lights up.

(3) Composition of Timing ON operation:

(4) Notes: ① The air conditioner commences operation 5-60 minutes before the set time. ② When the time reaches the set time, the TIMER lamp (yellow) will go off; ③ During the Timing ON operation, the current time is not displayed. (5) Use the TIMER ON button to set a new Timing ON time at any time and the air conditioner

will enter the stand-by state or warm-up running state after the changed set time.

(6) When the Timing OFF signal is received, the air conditioner will run in the timing mode with

an earlier set time.

(7) During the Timing ON operation and stand-by, when the operation switching, mode

switching or set temperature change signal is received from the remote controller, only the changed content will be accepted.

4.9 Programmed timer:

(1) Timing operations include Timing ON and Timing OFF. Once the function is enabled, the

operation begins. As long as the ON/OFF button is not pressed, the air conditioner will begin

operation at the same time everyday till the stop time. (2) Operation method: For example, to set the air conditioner to turn on at 8:00 and turn off at 22:30,

① Step 1: By referring to “4.9 Timing ON”, set it to ; ② Step 2: By referring to “4.8 Timing OFF”, set it to ;

③ When the TIMER lamp (yellow) lights up, the setting is finished; ④ The time will be displayed on the remote controller; ⑤ The displaying will change with the operation state: Stop( ),

Run.( )

(3) Repeated running:

(4) Notes:

① The operation becomes programmed running only when both the Timing On and Timing

OFF signals are received;

② The Timing ON and Sleep combined operation is executed once only and will not

become programmed operation.

(5) Use the TIMER ON or OFF button to set new ON time.

Timing ON

RUN Lamp

TIMER Lamp

Running state of compressor

Lamp lights up

Stop

△Timing ON signal

Timing ON stand-by

Warm-up running

(MAX 1 hour)

△Timing ON set time

Timing ON running

Timing ON run

Timing OFF run

Timing OFF

setting

Timing OFF

set time

Timing ON

set time

24 hours

Timing ON

set time

24 hours

Timing OFF

set time

24 hours

Timing OFF

set time

- 20 -

4.10 Current time setting:

(1) After inserting the batteries, the current time is set to 13:00

automatically.

In time setting, all contents displayed on the remote controller

are reset. (2) Operation method:

For example, to set to 11:30,

① Step 1: Use the pen point to press the ACL switch and the

TIMER lamp will flash. Here you can set the current time;

② Step 2: Press the or button to set the current time to 11:30;

③ Within 60 seconds, press the ON/OFF button and the lamp will change from flashing to a

fixed state, thus the setting is finished.

(3) Notes:

① Timing operation is set according to the current time;

② The time on the remote controller changes according to the setting of current time.

4.11 HI POWER operation

(1) HI POWER operation: Press the HI POWER button to enable the HI POWER operation, that

is, the cooling or heating function runs continuously for 15 minutes with the fan speed set to

High.

(2) Operation method:

① Step 1: In the Automatic, Cooling or Heating mode, press

the ON/OFF button;

② Step 2: Press the HI POWER button to switch to the HI

POWER mode, and the indoor unit will commence HI POWER or JET operation 5 seconds after receiving the signal.

(3) The HI POWER mode is canceled in one of the following

cases:

① The HI POWER button is pressed again; ② The operating mode is changed; ③ After 15 minutes; ④ The FAN SPEED button is pressed; ⑤ The system enters the Timing operation.

(4) Notes: ① During the HI POWER operation, the room temperature is not controlled. ② The HI POWER operation is not supported during the drying and programmed timer

operation. ③ The Shower and Warm Feet modes can’t be used with the HI POWER mode. ④ During the Timing ON operation, the HI POWER operation commences only after the

time reaches the ON time. ⑤ During the timing operation, the HI POWER operation can be set only after the timing

setting is finished. (5) Setting difference between HI POWER and JET operations: “O” means the option can be set; “X” means the option can’t be set.

Operating mode

Settings

Auto Cooling Heating Drying

Air flow

Temp.

Fan

speed

Air

direction

HI POWER

X X X O JET O X O

4.12 JET operation:

(1) JET operation: The system runs at the maximum fan speed to rapidly

achieve cooling or heating.

(2) Operation method: Press the FAN SPEED button to switch to the JET

mode.

(3) Note: JET operation has no time limit.

★ In the Cooling or Heating mode, the fan speeds corresponding to the

various modes are as follows:

Mode

Auto

JET

HI POWER

Standard

Econo

Fan Speed

Auto

Ultra high

ON/OFF

ACL

ON/OFF

HI POWER

FAN SPEED

- 21 -

4.13 POWER SAVE operation:

(1) The Power Save function regulates the frequency of the compressor, etc. and

reduces the current value during operation, thus reduces the cooling/heating capacity to save energy.

(2) Operation method: Point the remote controller at the air conditioner and use the

pen point to press the POWER SAVE button to make point at Power Save

. The Power Save operation is enabled. (3) Notes: ① The Power Save operation is set to disabled by default; ② When Power Save is enabled, other operations following it (except reset and CLEAN

operation) are valid.

4.14 Air direction regulation:

(1) Operation method:

● Step 1: Press the ON/OFF button to run the air conditioner; ② Step 2: Press the Up/Down AIR FLOW button, as shown in the figure

below, to regulate the up/down direction of the vertical flap;

(Up/down swing) (Warm Feet)

③ Step 3: Press the Left/Right AIR FLOW button, as shown in the figure below, to regulate

the left/right air direction of the horizontal flap:

(2) Notes:

① Cool Air Shower (for cooling only): Through air direction regulation, cool air can be

blown everywhere in the room;

② Warm Feet (for heating only): Through air direction regulation, warm air can be even

blown to the bottom of feet; (3) Use suggestions: ① Avoid directly blowing to the body for a long time;

② During cooling and drying, the up/down air direction is set to to prevent too

much cool air from going down;

③ During heating, the up/down air direction is set to to prevent too much warm

air from going up.

(4) Notes:

① When the Heating mode is enabled (that is, the heating operation begins), in order to

prevent cool air from blowing, the flap will move to the level position, in which case, the air direction can’t be set. When warm air begins to blow, the air flap will be restored to the set position, in which case, the air direction can be set.

② During the heating operation, when the room temperature is higher than the set

temperature, or during the defrosting operation, when the flap is at the level position, the air direction can’t be set. The air direction can be set only when warm air begins to blow.

③ In the Cool Air Shower or Warm Feet mode, the horizontal flap will be at the level

position.

④ In the Cooling or Drying mode, avoid blowing downwards for a long time, otherwise,

condensation may appear on the air outlet grille and drip down;

⑤ Never attempt to regulate the air flap or regulating port manually, otherwise, the control

angle may change and the flap can’t be fully closed.

⑥ Flap memorizing function (stop of flap): When the flap is swinging, press the AIR

FLOW (Up/Down or Left/Right) button once, it will stop at that angle. As this angle is memorized in the microcomputer, the flap will automatically operate at the same angle next time the machine is started.

Power

Save

Up/Down

Left/Right

(Swing stops) (Cool Air Shower)

(Swing stops) (Leftmost) (Left) (Level) (Right)

(Left/right swing) (Fixed point) (Wide-angle) (Rightmost)

- 22 -

4.15 Area setting:

(1) The area setting function is used to regulate the indoor air and the air in the specific area in

the room.

(2) Operation method: When the air conditioner is running, press the AREA

button, as needed, to switch to the desired area.

(3) The area indications are as follows:

(Bottom left) (Top left) (Top right) (Bottom right)

(4) Cancelation: Press the Up/Down or Left/Right button to regulate the air direction. (5) Notes:

① In the AUTO mode, the HI POWER and JET modes are not supported; ② After the Area setting is canceled, when the air conditioner is started again, the air

direction before the Area setting will be displayed.

4.16 Installation location setting:

(1) The installation location setting function is used to consider the installation location of air

conditioner and regulate the maximum space of the left/right air flow. (2) Operation method: ① Switch on the air conditioner and let it stay in the stop mode; If it is running, press the ON/OFF button to stop; ② Press and hold both the Up/Down and Left/Right buttons for over 5 seconds, and the

installation location will flash on the display;

③ Press the Left/Right button to regulate to the desired position;

whenever the Left/Right button is pressed, the displaying changes in the following order:

④ Within 1 minute, press the ON/OFF button again to send a signal to

the air conditioner and the air conditioner will memorize the installation location.

(3) The installation location and air direction range of the air conditioner are as follows:

(4) Notes: ① After the installation location is set again, even when the plug is unplugged, the air

conditioner will also memorize the installation location;

② During operation, the installation location can’t be set; ③ After the installation location is set, if the air conditioner is reset or the batteries are

replaced, the remote controller will display , i.e. the installation location memorized by the air conditioner.

4.17 Outline of automatic operation:

(1) Determination of operating mode:

After the indoor and outdoor fans operate at the 2nd speed

and 4th speed respectively for 20 seconds, the system will

check the room temperature, humidity and outdoor

temperature to automatically select the cooling, heating or

drying mode and the room temperature compensation

value, and operate automatically. (Note: Here, the vertical

flap stops at the level position and the horizontal flap

stops at the central position.) (2) The system checks the temperature every hour after the

operation begins. When the operating mode is judged to be different from the previous one,

the operating mode will be changed;

Area

setting

(Central)

(Full)

Area

setting

Press and hold both

buttons

for 5 sec.

Central

Rightmost

Lefttmost

(About 30° from front

direction)

(About 30° from front

direction)

Central

Left

Right

Left

Air direction

range

Cooling

Drying

Heating

Area A

Room

temp

Judgement

conditon

forArea A

Heating

Cooling

Air inlet temp. – set temp.

Outdoor temp.

- 23 -

(3) If the air conditioner is started again within 1 hour after the automatic operation stops, or it is

converted to automatic operation in the heating, cooling or drying mode, it will operate in the

previous mode. (4) The temperature can be set in the following range. The relationship between the signals of

the wireless remote controller and the set temperature is as follows:

Signals of wireless remote controller (displaying)

-6

-5

-4

-3

-2

-1 0 +1

Set temp Cooling

Drying

Heating

(5) Operation of remote controller: ① In the AUTO mode, press the or button to regulate 6 levels of temperature; ② Each time the or button is pressed, the temperature will be switched in the

following order: -6 ~ -5 ~ -4 ~ -3 ~ -2 ~ -1 ~ ±0 ~ +1 ~ +2 ~ +3 ~ +4 ~ +5 ~ +6

③ When -6 or +6 is displayed, press the or button and the displaying will not

change;

④ The set temperature of ±0 in AUTO mode is: Cooling 24℃, Heating 26 ℃, Drying

24℃.

4.18 Outline of drying operation:

(1) Judgment of operation state: ① After the indoor and outdoor fans run at the 2nd speed and 3rd speed respectively for 20

minutes. the system checks the room temperature (Tai) and outdoor temperature (Th0-A) to determine the operation state. (Note: Here, the vertical flap stops at the level position and the horizontal flap stops at the central position.)

② The system checks the temperature every hour after the operation begins. When the

operating mode is judged to be different from the previous one, the operating mode will be changed.

③ Judgment of operating mode:

Tai and TS (setting correction temperature), Th0-A relationship

Operating mode

Tai > TS-3 or Th0-A ≥ 19℃

Slightly cool heating & drying

Tai ≤ TS-3 or Th0-A < 19℃

Slightly warm heating & drying

(2) Notes: ① After the operating mode is judged, the system decides the running range according to

the room temperature and setting correction temperature every 5 minutes;

② Slightly cool heating & drying includes four running ranges, all of which are cooling

operations;

③ Slightly warm heating & drying includes four running ranges, in which three are cooling

operations and one is heating operation.

4.19 Outline of defrosting operation:

(1) Beginning conditions: Case 1 (The defrosting running begins when all of the following conditions are met): ① After the heating begins and the defrosting ends, the accumulated running time of the

compressor exceeds 45 minutes; ② The outdoor heat exchanger sensor (Th0-R) meets one of the following conditions: A) Accumulated running time of compressor < 150 minutes, Th0-R ≤ -5℃; B) Accumulated running time of compressor ≥ 150 minutes, Th0-R ≤ -3.5℃; ③ The outdoor heat exchanger sensor (Th0-R) and the outdoor air temp. sensor (Th0-A)

meet one of the following conditions: A) When outdoor air temp. sensor Th0-A ≥ 0℃: Accumulated running time of compressor < 150 minutes, (Th0-A) - (Th0-R) ≥ 7.0; B) When outdoor air temp. sensor Th0-A ≥ 0℃: Accumulated running time of compressor ≥ 150 minutes, (Th0-A) - (Th0-R) ≥ 4.0; C) When outdoor air temp. sensor -15℃ ≤Th0-A < 0℃: Accumulated running time of compressor < 150 minutes, (Th0-A) - (Th0-R) ≥ 4/15 *

(Th0-A) + 7; D) When outdoor air temp. sensor -15℃ ≤ Th0-A < 0℃: Accumulated running time of compressor ≥ 150 minutes, (Th0-A) - (Th0-R) ≥ 4/15 *

(Th0-A) + 6; E) When outdoor air temp. sensor Th0-A < -15℃: (Th0-A) - (Th0-R) ≥ -5.0; ④ The compressor runs for over 7 minutes continuously.

Case 2: Low load running (The defrosting running begins when all of the following conditions

are met):

① After the heating begins and the defrosting ends, the accumulated running time of the

compressor is 45 minutes with air flow controlled;

- 24 -

② The outdoor heat exchanger sensor (Th0-R) meets one of the following conditions: A) When the actual rotate speed of the compressor N ≥ 62 rps: Th0-R ≤ -5℃; B) When the actual rotate speed of the compressor N < 62 rps: Th0-R ≤ -4℃; ③ Outdoor air temp. sensor (Th0-A): Th0-A ≤ 3℃; ④ The compressor runs for over 7 minutes continuously. (2) Ending conditions: 135 seconds after the system is switched to the defrosting mode, the defrosting running is

canceled when one of the following conditions is met: ① Outdoor heat exchanger sensor (Th0-R): Th0-R ≥ 13℃; ② The elapsed time of defrosting running is 15±0.5 min. (3) Operation time pattern of various functional parts in defrosting control:

Defrosting

Compressor 4-way valve

Outdoor fan

Operation of outdoor

functional parts

5 sec.

speed

Usual control

Enter

EEV openng

EEV control

EEV openng

EEV control

End running EEV openng

Usual heating

Defrosting

running state

Beginning

conditions met

Enter defrosting

running

Ending

conditions

met

End defrosting

running

Heat-retaining

ineffective

Indoor fan

RUN lamp

Operation of indoor

functional parts

Indoor → outdoor

communication

Verhical/horizontal flap

Response

Flahsing

(heat-retaining)

Control

Set position

In the defrosting control, even when the compressor

displays OFF, the heat-retaining displaying is effective.

Singnal of

compressor

Defrosting

singnal

- 25 -

4.20 Outline of vertical and horizontal flaps control:

(1) Overview: Sm1: Vertical flap (mounted on the right side when you face the appliance); Sm2: Left horizontal flap (mounted on the left side when you face the appliance); Sm3: Right horizontal flap (mounted on the right side when you face the appliance);

(2) Vertical flap Sm1:

The level set is 0℃.

(3) Horizontal flaps Sm2 and Sm3:

(4) Reference position control: ① Beginning condition: This control is executed only when the air conditioner begins to run.

It is not executed when the operating mode is switched and the flap mode is changed.

② Control: This control ends when the vertical flap Sm1 moves to position ① and the

horizontal flaps Sm2 and Sm3 move to position . The flaps stop at the position set with the remote controller or the preset position memorized.

(4) Control of vertical flap and horizontal flaps at the start of heating, stop of heating and for

defrosting:

To avoid blowing cool air during heating before the indoor heat exchanger is fully warmed. ① Beginning condition (when one of the following conditions is met): A) The indoor running mode is switched from a mode other than Heating to the Heating

mode, and the temperature measured by the indoor heat exchanger sensor is < 28℃; B) During the Heating mode, the compressor displays OFF; C) During the Heating mode, the defrosting signal is received. ② Control: This control ends when the vertical flap Sm1 moves to position and the

horizontal flaps Sm2 and Sm3 move to position ⑧. ③ Ending conditions (when one of the following conditions is met): A) The indoor running mode is switched from a mode other than Heating to the Heating

mode, and the temperature measured by the indoor heat exchanger sensor is ≥ 28℃;

B) In the Heating mode, the compressor is changed from OFF to ON, and the

temperature measured by the indoor heat exchanger sensor is ≥ 28℃;

C) In the Heating mode, the defrosting signal is canceled, and the temperature measured

by the indoor heat exchanger sensor is ≥ 28℃; D) When this control is canceled, the flap position before the control is restored. ④ Notes: A) This control is not executed in the JIS mode; B) This control is not executed when the temperature measured by the indoor heat

exchanger sensor is approximately below -28℃ (disconnection of sensor).

Position

Angle

Relationship between rotation direction of motor and state of vertical flap Vertical flap closed → CCW of motor Vertical flap opened → CW of motor

Position

Angle

For left flap

For right flap

Wide-angle

Fixed point direction

- 26 -

4.21 Outline of electronic expansion valve (EEV) control:

(1) Overview: ① Initial control: When the power is ON and the reference position is determined, the EEV opening is

widened within 5 minutes to let the refrigerant return, thus makes the low pressure rise easily and avoid misdiagnosis of insufficient refrigerant and poor EEV operation as the low pressure can’t rise after decline;

② Open loop control: After the initial control, when the temperature measured by the sensor, etc. are

unstable, the EEV opening is set according to the balance of the compressor;

③ Area control: During quasi-steady running and steady running, the EEV opening is set according to

the extent of over heat of exhaust, mainly aiming at the measure for the deviation due to open loop

control; ④ Stop control: The EEV opening is set according to the stop control; ⑤ Negative pressure countermeasure control: When the mode is switched from a mode other than

Heating to the Heating mode, the compressor is changed from OFF to ON, and the outdoor

temperature is too low (temperature measured by discharge pipe sensor (Th0-D) - temperature

measured by outdoor air temp. sensor (Th0-A) < 10℃), this control is executed for 8 minutes to

avoid negative pressure risk; ⑥ Throttle correction control of cooling & drying: Five minutes after the area control, when the actual

rotate speed of the compressor is below 24 rps and the temperature measured by the outdoor air

temp. sensor (Th0-A) meets the condition 25℃≤ Th0-A < 38℃ and the temperature measured by

the indoor heat exchanger sensor (Th1-RX) is above 10℃, this control is executed to increase the

latent heat capacity in cooling; ⑦ Condensation prevention control: When the actual rotate speed of the compressor is above 32 rps

and the value measured by the humidity sensor (HS) is above 68% for 30 minutes continuously, this

control is executed to make the actual rotate speed of the compressor reduce to below 32 rps or

make the value measured by HS reduce to below 63%. (2) Priority of various EEV controls: Stop control > Defrosting control > Indoor issued fixed opening control > Initial control > Protective

control > Open loop control and area control

(3) Except the special situations such as reference position control, etc., others are controlled within the

pulse range of 41-47.

4.22 Outline of compressor control:

(1) Overview of ON/OFF of cooling and heating running: ① When the outdoor running mode is Cooling or Heating, the compressor has stopped for over 3

minutes, and the compressor running signal from the indoor unit is received, the compressor will be

turned on; ② When the compressor is ON, the rotate speed of the compressor is fuzzily calculated using the

temperature of the indoor inlet air, the temperature set with the remote controller, the setting

correction temperature, etc., and the outdoor unit sends the compressor ON signal, the value of

fuzzy calculation, the actual rotate speed, etc. to the indoor unit; ③ When the outdoor running mode is Cooling or Heating, the compressor has run for over 5 minutes,

and the compressor stop signal from the indoor unit is received, the compressor will be turned off; ④ When the compressor is OFF, the outdoor unit sends the compressor OFF signal, the value of fuzzy

calculation, the actual rotate speed, etc. to the indoor unit; ⑤ In defrosting control, the compressor OFF conditions are not judged. (2) Running range: 20-120 rps (varying depending on the model). (3) In order to prevent the oil level of the compressor from falling and ensure that oil is supplied to the

pump of the compressor normally, enable the protection against temporary rise of rotate speed of compressor.

(4) In order to guarantee the pressure difference for switching the 4-way valve, enable the low load for

temporary rise of rotate speed of compressor.

(5) With respect to the change rate of the actual rotate speed of the compressor, the instructed rotate speed

from the outdoor inverter to the compressor and the temperature measured by the outdoor heat exchanger sensor (during cooling) or the temperature measured by the indoor heat exchanger sensor (during heating) should be observed to decide the rise/fall speed of the compressor (2 rps, 1/2 rps) and finally make the compressor operate in the appropriate working state.

4.23 Outline of outdoor fan control:

(1) The settings of rotate speed of the outdoor fan are as follows:

Speed position

① ② ③ ④ ⑤ ⑥ ⑦

⑧

Rotate speed

(rpm) 20MA-S

150

240

570

630

720

780

840

920

25 MA-S

150

240

570

630

720

780

840

920

35 MA-S

150

240

570

640

750

840

900

950

50 MA-S

150

290

520

650

700

750

800

850

- 27 -

(2) Priority of rotate speed control:

Error response control > Outdoor fan control in compressor soft start control > Outdoor fan

control in defrosting control > Outdoor fan control/indoor forcing outdoor fan running control in stop mode > Outdoor fan control at start > Outdoor fan control at the low outdoor temperature in cooling > Outdoor fan control under overload in cooling > Delayed speed

position switching > Outdoor fan control under overload in heating > Speed position control (3) Error response control: When the outdoor fan runs at a speed below 75 rpm for over 30 seconds, the inverter will

immediately stop output to the fan and indicate results of self-diagnosis; if this occurs 3

times, it will send the error code to the indoor unit; if the speed exceeds 75 rpm once before

the 3 times, recount will be conducted. (4) The minimum rotate speed of the outdoor fan in the compressor soft start control is speed

④. (5) In the defrosting control, the rotate speed of the outdoor fan is OFF or speed ⑥. (6) Outdoor fan control in the stop mode: When the actual rotate speed of the compressor is 0, the outdoor fan continues to run at speed

③ for 1 minute or 2 minutes and 55 seconds and then stop. (7) Indoor forced running control: When the outdoor fan running start signal is received from the indoor unit, the operation at

the fan speed received will begin, and this control is unrelated to the running mode,

compressor instruction and protection stop (except outdoor fan error, low voltage). This

control is canceled when the outdoor fan running cancel signal is received from the indoor

unit. (8) At start, the outdoor fan operates according to the speed position control; when the

compressor is started and in the ON state in the cooling mode and the outdoor temperature is

below 22℃, it will run at speed ② or ① for 30 seconds. (9) Outdoor fan control of low outdoor temperature in cooling, overload in cooling, low outdoor

temperature in heating and overload in heating: ① In the cooling or heating mode, when the compressor is in the ON state and the

temperature measured by the outdoor air temp. sensor meets the control conditions, this

control will begin. ② This control is canceled when either of the above conditions is not met. ③ According to the temperature measured by the outdoor heat exchanger liquid pipe sensor

and the temperature measured by the outdoor air temp. sensor, the rotate speed of the

outdoor fan is decreased (to as low as speed ② or ①) or increased (up to speed ⑧). (10) Delayed speed position switching control: When the outdoor fan is changed from a high speed position to a low one, the switching is

generally delayed for 60 seconds. If it is changed to a high speed position within 60 seconds, the delay will be canceled and it is converted to the high speed position immediately. If the outdoor fan is changed to OFF, there will be no delay and it will stop immediately.

(11) The speed position control is generally between speed ③ and ⑧.

4.24 Outline of indoor fan control:

(1) The settings of rotate speed of the indoor fan are as follows:

(2) Priority of rotate speed switching: HI POWER > AUTO/HI/ME/LO

(3) Error response control:

When the indoor fan runs at a speed below 75 rpm for over 30 seconds, the air conditioner

will fully stop to indicate the results of self-diagnosis.

(4) When the indoor fan is started and runs for 1 second under the initial voltage at the speed of

300 rpm, the system will compare with the signal from the fan to correct the rotate speed to

the determined one. (5) Rate of rotate speed adjustment: 80 rpm for increase and 10 rpm for decrease. (6) The speed positions corresponding to the fan speeds are as follows:

Air flow switching

AUTO

HI POWER

Speed position of indoor fan

⑤ ⑥ ⑤ ④ ⑦

Speed position

Rotate

speed (rpm)

- 28 -

(7) The relationship between the rotate speed of heat-retaining during heating and the

temperature measured by the indoor heat exchanger sensor Th1-R1 is as follows:

Speed position of indoor fan

Temperature measured by the

indoor heat exchanger sensor

When the compressor displays ON

When the compressor displays OFF

- 29 -

5 Installation

○ Use this system only for household and

residence.

○ This appliance must be installed according to the national wiring regulation. ○ A 2-level switch must be used for the fixed wiring of the power supply and its disconnection

clearance must be at least 3mm.

○ If the outdoor unit may tip over or move and drop from the original installation location, use

trip bolts or string to secure it in place.

○ The liquid pipe and gas pipe in the piping should be insulated with thermal insulation.

SAFETY PRECAUTIONS

• Please read this “SAFETY PRECAUTIONS” carefully before the installation work in order to ensure correct installation.

• The precautions described below are divided into WARNING and CAUTION. The matters with possibilities leading to

serious consequences such as death or serious personal injury due to erroneous handling are listed in the WARNING, however the matters listed in CAUTION may sometimes lead to serious accidents. These are very important precautions for safety. Be sure to observe all of them without fail.

• For qualified installing personnel, take precautions in respect to themselves by using suitable protective clothing, groves, etc., and then perform the installation works.

• Please pay attention not to fall down the tools, etc. when installing the unit at the high position.

• If unusual noise can be heard during operation, consult the local dealer.

• Be sure to confirm no anomaly on the equipment by commissioning after completed installation and explain the operating methods as well as the maintenance methods of this equipment to the user according to the owner’s manual.

• Symbols which appear frequently in the text have the following meaning:

Strictly prohibited

Observe instructions

Provide proper earthing

• Keep the installation manual together with owner’s manual properly. Moreover if necessary, ask to hand them to a new user.

WARNING

• Installation must be carried out by the qualified

installer and only the specified optional components should be used.

If you install the system by yourself, it may cause serious trouble such as water leaks, electric shocks, fire and personal injury, as a result of a system malfunction.

• Install the system in full accordance with the

instruction manual.

Incorrect installation may cause bursts, personal injury, water leaks, electric shocks and fire.

• Be sure to use only for household and residence.

If this appliance is installed in inferior environment such as machine shop etc., it can cause malfunction.

• Use the original accessories and the specified

components for installation.

If parts other than those prescribed by us are used, it may cause drop of machine, water leaks, electric shocks, fire, refrigerant leakage, insufficient performance, poor control, and personal injury.

• Install the unit in a location with good support and

ensure the unit is stable when installed, so that it can withstand earthquakes and strong winds.

Unsuitable installation locations can cause the unit to fall and cause material damage and personal injury.

• Ventilate the working area well in the event of

refrigerant leakage during installation.

If the refrigerant comes into contact with naked flames, poisonous gas is produced.

• When the equipment is to be installed in a small room,

take preventive measures to avoid refrigerant leakage exceeding the density limit.

Consult with the installation professionals about the preventive measures. If the density is greater than the limit of refrigerant, it may cause serious accidents such as refrigerant leakage, shortage of oxygen, etc.

• Confirm there is no refrigerant leakage after the

installation.

If the refrigerant leaked comes into contact with the fire of an air blowing type heater, oven, etc., poisonous gas is produced.

• Use the prescribed pipes, flare nuts and tools for

R410A.

Using conventional parts (for R22) can cause the unit failure and serious accidents due to burst of the refrigerant circuit.

• Tighten the flare nut by torque wrench with specified

method.

If the flare nuts were tightened with excess torque, this may cause burst and refrigerant leakage after a long period.

• Do not open the operation valves for liquid line and

gas line until completed refrigerant piping work, air tightness test and evacuation.

If the compressor is operated when operation valves are open before the connection of refrigerant piping work is completed, it can cause frostbite or injury due to rapid refrigerant leakage, and burst or personal injury due to anomalously high pressure in the refrigerant circuit into which air is sucked.

• The electrical installation must be carried out by the

qualified electrician in accordance with “the norm for electrical work” and “national wiring regulation”, and

the system must be connected to the dedicated circuit.

Power supply with insufficient capacity and incorrect function done by improper work can cause electric shocks and fire.

• Be sure to shut off the power before starting electrical

work.

Failure to shut off the power can cause electric shocks, unit failure or incorrect function of equipment.

• Be sure to use the cables conformed to safety standard

and cable ampacity for power distribution work.

Unconformable cables can cause electric leak, anomalous heat production or fire.

• This appliance must be connected to main power

supply by means of a circuit breaker or switch (fuse:16A) with a contact separation of at least 3mm.

• If the appliance has a plug, the plug must comply with

IEC 60884-1.

• Use the prescribed cables for electrical connection,

tighten the cables securely in terminal block and relieve the cables correctly to prevent overloading the terminal block.

Loose connections or cable mountings can cause anomalous heat production or fire.

• Arrange the wiring in the control box so that it cannot

be pushed up further into the box. Install the case and service panel correctly.

Incorrect installation may result in overheating and fire.

• Be sure to mount the service panel.

Incorrect mounting can cause electric shocks or fire due to intrusion of dust or water.

• Be sure to switch off the power supply before

installation, inspection or servicing.

If the power supply is not shut off, there is a risk of electric shocks, unit failure or personal injury due to the unexpected start of fan.

Precautions for installation

- 30 -

WARNING

• To recover refrigerant, stop the compressor before closing the valve and disconnecting the refrigerant piping.

If the refrigerant piping is disconnected before the compressor stops and when the service valve is opened, it can cause frostbite or injury due to rapid refrigerant leakage, and burst or personal injury due to anomalously high pressure in the refrigerant circuit into which air is sucked

• Do not put the drainage pipe directly into drainage

channels where poisonous gases such as sulphide gas can occur.

Poisonous gases will flow into the room through drainage pipe and seriously affect the user’s health and safety.

• Never connect the power cord to the central socket.

Never use extended wires or share a socket with other electrical appliances.

This may cause fire or electric shocks due to defective contact, poor insulation and over-current etc.

• Do not discharge R410A to the atmosphere. R410A is a

fluoride greenhouse gas and can cause global warming if it is discharged to the atmosphere.

• Ensure that no air enters in the refrigerant circuit

when the unit is installed and removed.

If air enters in the refrigerant circuit, the pressure in the refrigerant circuit becomes too high, which can cause burst and personal injury.

• Do not bundle or wind the power cord. Or, do not

deform the power plug by treading it.

This may cause electric shocks, heating or fire.

• Do not run the unit with removed panels or

protections.

Touching rotating equipments, hot surfaces or high voltage parts can cause personal injury due to entrapment, burn or electric shocks.

• Do not perform any change of protective device itself

or its setup condition.

The forced operation by short-circuiting protective device of pressure switch and temperature controller or the use of non specified component can cause fire or burst.

• Carry out the electrical work for ground lead with care.

Do not connect the ground lead to the gas line, liquid line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause unit faults such as electric shocks due to short-circuiting. Never connect the ground lead to the gas line as gas leakage can cause explosion or fire.

CAUTION

• Use the circuit breaker with correct breaking capacity

at all electrodes.

If a wrong breaker is used, it can cause the unit malfunction and fire.

• Earth leakage breaker must be installed.

If the earth leakage breaker is not installed, it can cause fire or electric shocks.

• Secure a space for installation, inspection and

maintenance specified in the manual.

Insufficient space can result in accident such as personal injury due to falling from the installation place.

• After maintenance, all wiring, wiring ties and the like,

should be returned to their original state and wiring route, and the necessary clearance from all metal parts should be secured.

• Take care when carrying the unit by hand.

If the unit weighs more than 20kg, it must be carried by two or more persons. Do not carry by the plastic straps, always use the carry handle when carrying the unit by hand. Use gloves to minimize the risk of cuts by the aluminum fins.

• Dispose of any packing materials correctly.

Any remaining packing materials can cause personal injury as it contains nails and wood. And to avoid danger of suffocation, be sure to keep the plastic wrapper away from children and to dispose after tearing it up.

• Be sure to insulate the refrigerant pipes so as not to

condense the ambient air moisture on them.

Insufficient insulation can cause condensation, which can lead to moisture damage on the ceiling, floor, furniture and any other valuables.

• When the air conditioner is operating (cooling &

drying operation) and the ventilator installed in the room is also running, there is the possibility that drain water may backflow as the room enters the negative pressure state. Therefore, set up the opening port to let air enter the room to provide appropriate ventilation (for example, open the door a little). In addition, just as above, set up the opening port if the room enters the negative pressure state due to the aerator for the high rise apartment etc.

• Install isolator or disconnect switch on the power

supply wiring in accordance with the local codes and regulations.

• Do not install the unit in the locations listed below.

• Locations where carbon fiber, metal powder or any

powder is floating.

• Locations where any substances that can affect the unit

such as sulphide gas, chloride gas, acid and alkaline can occur.

• Vehicles and ships.

• Locations where cosmetic or special sprays are often

used.

• Locations with direct exposure to oil mist and steam such as kitchen and machine plant.

• Locations where any machines which generate high

frequency harmonics.

• Locations with salty atmospheres such as coastlines.

• Locations with heavy snow.

• Locations where the unit is exposed to chimney smoke.

• Locations at high altitude (more than 1000m high).

• Locations with ammonic atmospheres.

• Locations where heat radiation from other heat source

can affect the unit.

• Locations without good air circulation.

• Locations with any obstacles which can prevent inlet and

outlet air of the unit.

• Locations where short circuit of air can occur (in case of

multiple units installation).

• Locations where strong air blows against the vent of outdoor unit. It can cause remarkable decrease in performance, corrosion and damage of components, malfunction and fire.

- 31 -

CAUTION

• Do not install the outdoor unit in the locations listed

below.

• Locations where discharged hot air or operating sound of

the outdoor unit can bother neighborhood.

• Locations where outlet air of the outdoor unit blows directly to animals or plants. The outlet air may cause adverse impact on plants, etc.

• Locations where vibration and operation sound generated

by the outdoor unit can affect seriously (on the wall or at the place near bed room).

• Locations where vibration can be amplified and

transmitted due to insufficient strength of structure.

• Locations where an equipment affected by high

harmonics is placed (TV set or radio receiver is placed within 5m).

• Locations where drainage cannot run off safely. It can affect surrounding environment and cause a complaint.

• Do not install the unit where corrosive gas (such as sulfurous acid gas etc.) or combustible gas (such as thinner and petroleum gases) can accumulate or collect, or where volatile combustible substances are handled.

Corrosive gas can cause corrosion of heat exchanger, breakage of plastic parts and etc. And combustible gas can cause fire.

• Do not use the base flame for outdoor unit which is

corroded or damaged due to long periods of operation.

Using an old and damaged base flame can cause the unit falling down and cause personal injury.

• Do not touch the suction or aluminum fin on the

outdoor unit.

This may cause injury.

• Do not install the outdoor unit in a location where insects and small animals can inhabit.

Insects and small animals can enter the electric parts and cause damage or fire. Instruct the user to keep the surroundings clean.

• Do not install nor use the system close to the

equipment that generates electromagnetic fields or high frequency harmonics.

Equipment such as inverters, standby generators, medical high frequency equipments and telecommunication equipments can affect the system, and cause malfunctions and breakdowns. The system can also affect medical equipment and telecommunication equipment, and obstruct its function or cause jamming.

• Do not use any materials other than a fuse with the

correct rating in the location where fuses are to be used.

Connecting the circuit with copper wire or other metal thread can cause unit failure and fire.

• Do not touch any buttons with wet hands.

It can cause electric shocks.

• Do not touch any refrigerant pipes with your hands

when the system is in operation.

During operation the refrigerant pipes become extremely hot or extremely cold depending on the operating condition, and it can cause burn injury or frost injury.

• Do not put anything on the outdoor unit and operating

unit.

This may cause damage of the object or injury due to the fall of the object.

5.1 Selection of installation location

Indoor unit

○ Where there are no obstructions and

where cool air and warm air can blow in the room.

○ Where the indoor unit or wall does not

vibrate and where is strong.

○ Where there is adequate space for

servicing. (The space mentioned below is safe.)

○ Where wire and pipe mounting is

convenient.

○ Where direct sunlight and strong light do

not hit the unit.

○ Where water from the unit can drain

easily.

○ Where there is at least 1 meter distance

from the TV set or radio. (Otherwise, it may interfere with TV reception or produce noise.)

Outdoor unit

○ Where rain, snow and sunlight do not

directly hit the unit, and where there is enough air circulation.

○ Where blasts of cold or hot air and noise

do not bother the neighbors.

○ Where there are installation and servicing

conditions. ○ A location where vibrations are not enhanced and where is strong. ※ Please avoid the following locations.

○ A location near the room, etc. to prevent the operating noise from causing trouble. ○ Where there are possibilities of flammable gas leaks. ○ Where there is constant exposure to harsh winds.

At least 6.5 cm from ceiling

Mounting plate

At least 10 cm from wall

At least 5 cm from wall

Wall hole sleeve

Wall hole sleeve cover

Electric component service panel

- 32 -

Selection of installation location

○ The appliance must be installed at a location with the vents and air intake being 10cm away from

walls.

(In case the fence is 1.2m or above in height, or is overhead, the sufficient space between the unit and wall shall be secured.)

○ When the unit is installed, the space of the following dimension shall be secured.

○ Removal

① Remove the air inlet grille.

② Remove the 2 screws

securing the front panel.

③ Remove the 3 latches on

the upper part of the front panel and remove the front panel from the unit.

○ Installation ① Remove the air filter.

② Cover the unit with the

front panel.

③ Tighten the 2 screws to

secure the front panel.

④ Mount the air filter. ⑤ Mount the air inlet grille.

5.2 Installation of indoor unit

How to remove and install the front panel

Mountng of mounting plate

Air intake

10cm MIN

No obstacles (Service space for electrical parts)

10cm MIN

Air

intake

Air outlet

60cm MIN

Caution

If the wall is 1.2m or above in height or there is a ceiling, the sizes should be greater than those indicated above.

Latches

Front panel

Air inlet grille

Screw

Fixing the mounting plate

Firstly find the position of support or columella in the wall. Check that the mounting

location is level and then fix the

unit more securely.

Plane mating mark

○ In the loose state, use

four screws to adjust the mounting plate

horizontally.

Standard

hole

○ Turn the mounting

plate with the standard hole as the center to make it level.

Setting the relationship between plate and indoor unit

Installation space

(Indoor unit) (Front view)

Service space

Indoor unit

Service

space

Mounting plate

Pipe hole

Gas piping

Liquid piping

Drainage pipe

Pipe hole

Service space

Fixing on the concrete wall

Using nut retainer

Using screw retainer

Mounting plate

Mounting

plate

Nut

Max.

- 33 -

Installation of indoor unit

Drilling holes and securing sleeve (optional)

Drilling a hole with Φ65 whole core drill

Indoor

Outdoor

Adjusting the length of the sleeve

Top

Thickness of wall

Use the whole core drill to drill a hole.

Mounting the sleeve.

○ If the rear pipe is pulled out, cut the

lower part and right side of the axle collar

Sleeve Declined plate Sealing ring

Turn to tighten

Indoor

Outdoor

Putty

Insert the sleeve.

Sketch of state after mounting

Sleeve

Indoor

Outdoor

Declined flange

Sealing ring

Caution

Drill a hole at an angle of 5°

Preparation for installation of indoor unit

Preparation for mounting of electric wire

① Open the air inlet grille. ② Remove the cover. ③ Open the wire clamp. ④ Connect the electric wire to the connection board

securely.

1) Connect the electric wire to the connection board securely. If the electric wire is not fixed completely, the contacting will be poor, thus causes risk, as the connection board may heat which causes fire.

2) Please note that the number of terminals of the indoor and outdoor connections should not be confused.

3) Use the wire clamp to connect the electric wire.

⑤ Connect the electric wire through the wire clamp. ⑥Secure the cover. ⑦ Close the air inlet grille.

Connection board

Terminal cover

Inlayed piece of the base

Wire clamp

Screw

● Some space shall

be left to unload screw after installation.

Caution

In case of failure of wiring connection, the indoor unit will stop running, the RUN lamp will light up, and the TIMER lamp will flash.

- 34 -

Mounting pipe support

● Precautions for connection to the left and to

center/rear [Top view]

Pipe shaping

Pipe

Drainage pipe

○ Hold the root segment of

the pipe, pull out the pipe, and shape the extended section.

Insulation tape winding

Connecting the pipe to the left

Connecting the pipe to the right

Connecting the pipe to the left rear

Connecting the pipe to the right rear

Connecting the pipe to the right

Connecting the pipe to the left

The pipe can be connected to the rear, left, left rear, bottom left, right or bottom right. [Steps for drainage pipe displacement]

1. Removing the drainage pipe

2. Removing the drain cover

○ Turn the drainage pipe to

remove it.

○ Remove it by hand or with

pliers.

To the right

To rear

Downward

To the left

To left rear

To bottom left

3. Inserting the drain cover

○ Use the hexagon wrench to securely insert the

drain cover removed in Step 2.

Note: If it is not inserted securely enough, water

leakage may occur.

4. Connecting the drainage pipe

○ Securely insert the drainage pipe and make it

rotate.

Note: If it is not inserted securely enough, water

leakage may occur.

○ Wind the section

extending to outdoor with exterior insulation tape.

○ Be sure to wind the

wiring and the piping together with exterior insulation tape.

○ To apply the exterior

insulation tape, be sure to begin from the lower part of the piping to avoid intrusion of rain.

Securing the indoor unit

Indoor unit

Mounting

plate

Wall

Mounting plate

Lower latch on base

of indoor unit

Mounting steps

① Pull the pipe through the

hole in the wall, and hang the upper section of the indoor unit on the mounting plate.

② Gently push the lower

section and secure the unit.

● How to remove the indoor unit from the

mounting plate

① Push the lower latch on the base of the indoor

unit upwards on the mark. (The lower latch can be removed from the mounting plate.)

② Push the indoor unit upwards to remove the

indoor unit from the mounting plate.

Inlayed piece of the base

(Right)

Latches (2)

Mark on lower latch on

base of indoor unit

The air conditioner has a drain pan collecting dew mounted on the back. Never put power cord on the drain pan.

Drain pan

Pipe collection section

- 35 -

Drainage pipe

○ Mount the drainage pipe at a downward angle. ○ Avoid the following drainage pipe connections.

Caution

After all mounting steps, check whether the drain is proper. Otherwise, water leakage may occur.

Higher than as required

End of drainage pipe

in water

Undulating

Less than 5cm away

from ground

Odor

from sink

End of drainage

pipe in sink

Shielded-plate

tube

Drainage pipe

When exposed in

the room

Extended drainage pipe

○ Pour the water into the drain pan under the heat

exchanger and ensure the water is drained to outdoor

○ When the extended drainage pipe is in the room, be

sure to use a shielded-plate tube (to be mounted by the user) to ensure thermal insulation.

Installation of outdoor unit

○ Make sure that the unit is stable in installation. Fix

the unit to stable base.

○ When installing the unit at higher place or where

it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire, etc.

○ Perform wiring, making wire terminal numbers

conform to terminal numbers of indoor unit terminal block.

○ Connect using ground screw located near

mark.

○ Never install the water elbow when the

temperature is below 0℃ for several days in a row.

Water elbow

Groundwater-

preventing

piston

Ethylene hose (Ethylene hose available on the market) (For heat pump type only)

Pipe connection

Preparation

Before pipe connection, cover the pipes with tape, etc. to prevent dust, sand, etc. from entering.

Indoor

Outdoor

Size A

Caution

Do not apply refrigerating machine oil to the ﬂared surface.

(Do not turn)

Press

Liquid: side

Gas side:

Models 20-35:

○ Screw off the flare

nut (liquid and gas sides)

○ Screw off the flare

nut (liquid and gas sides)

○ Mount the flare nut screwed off

onto the pipe to be connected to form a trumpet shape.

- 36 -

Flaring

Measurement B

Flaring block

Copper pipe

Model

Copper pipe

diameter

Measurement B

Clutch type flare tool

for R410A

Conventional (R22) flare tool

Clutch type

Wing nut type

Use a flare tool designed for R410A or a conventional flare tool. Please note that measurement B (protrusion from the flaring block) will vary depending on the type of flare tool in use. If a conventional flare tool is used, please use a copper pipe gauge or a similar instrument to check protrusion so that you can keep measurement B to a correct value.

Caution

Do not apply excess torque to the flared nuts. Otherwise, the flared nuts may crack depending on the conditions and refrigerant leak may occur.

Connection

Indoor

Outdoor

Liquid side Gas side

(Do not turn)

Liquid side Gas side

○ Connect the pipes on both liquid and gas sides. ○ Tighten the nuts to the following torque.

Liquid side Gas side

○ Connect the pipes on both liquid and gas sides. ○ All torques are the same as on the indoor liquid

side.

Air purging

① Secure all flare nuts on both indoor and outdoor sides

to prevent leaks from the pipes.

② Connect the operation valves, charge hose, manifold

valve and vacuum pump as shown in the right figure.

③Fully open Handle Lo for the manifold valve, and

pump a vacuum for over 15 minutes. Ensure that the meter is indicating -76cmHg (-0.1MPa).

④ After vacuuming, fully open the operation valve (both

liquid and gas sides) with a hexagon wrench.

⑤ Ensure that there are no gas leaks from the joints in

the indoor and outdoor units.

Compound pressure gauge

Operation valve (2-way valve)

Gauge manifold (Designed specifically for R410A)

Pressure gauge

Operation valve (3-way valve)

Service port

Charge hose (Designed specifically for R410A)

Vacuum pump adapter (Anti-reverse flow type) (Designed specifically for R410A)

Handle Hi Charge hose (Designed specifically for R410A)

Handle Lo

● Since the system uses service ports differing in diameter from those found on the conventional models, a

charge hose (for R22) presently in use is not applicable. Please use one designed specifically for R410A.

● Please use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from

running back into the system. Oil running back into an air-conditioning system may cause the refrigerant cycle to break down.

Heat insulation for joints

Finish and fixing

Cover the joint with insulation material for the indoor unit and tape it.

Vinyl tape

Position so the slit comes on top.

Apply exterior tape and shape along the place where the pipes will be routed. Secure to the wall with a pipe clamp.

Pipe clamp

Pipes

Exterior tape

Drainage pipe

Tapping screw

Ground wire

Crossover wires

Earthing Work

○ Earth work shall be carried out without fail in order to prevent electric shock

and noise generation.

○ The connection of the earth cable to the following substances causes

dangerous failures, therefore it shall never be done. (City water pipe, Town gas pipe, TV antenna, lightning conductor, telephone line, etc.)

- 37 -

5.5 Precautions for wireless remote controller operation:

(1) Effective distance of wireless remote controller:

(2) Precautions: ① The remote controller should be correctly facing the receiver of the air conditioner for

manipulation.

② The typical coverage is indicated in the left illustration. It may be increased or decreased

depending on the installation.

③ The coverage may be decreased or even nil, if the receiver is exposed to strong light, such as

direct sunlight, illumination, etc., or covered by dust or used behind a curtain, etc.

Moving or removing the appliance

○ In order to meet the requirement of environmental protection, pump down (recovering

refrigerant) is required.

○ The effect of pump down is to return the refrigerant from the indoor unit to the outdoor unit

when the pipes are removed from the main frame. (Pump down method)

① Connect the charge hose to the service port. ② Liquid side: Close the liquid valve with a hexagon wrench.

Gas side: Fully open the gas valve Cooling operation (If the room temperature is too low, run the HI POWER cooling.) ③ When the pressure gauge indicates 0.01Mpa, stop cooling and close the gas valve.

Safe disposal of product after the useful life

● The safe, comfortable useful life of the product is 10 years.

● Some products may be used even after the normal useful life is expired.

● For the destruction or disposal of the product and waste after the useful life has expired, the

impact on safety and environment must be considered.

Installation test check points

Check the following points after completion of the installation, and before turning on the power. Conduct a test run and ensure that the unit operates properly. At the same time, explain to the customer how to use the unit and how to take care of the unit following the installation manual.

After installation

□ The power supply voltage is correct as the rating. □ No gas leaks from the joints of the operation

valve.

□ Power cables and crossover wires are securely

fixed to the terminal block.

□ Operation valve is fully open. □ The pipe joints for indoor and outdoor pipes

have been insulated.

When the air conditioner is restarted or when changing the operation, the unit will not start operating for approximately 3minutes. This is to protect the unit and it is not a malfunction.

Test run

□ Air conditioning and heating are normal. □ No abnormal noise. □ Water drains smoothly. □ Protective functions are not working. □ The remote control is normal. □ Operation of the unit has been explained to the

customer.

(Three-minute restart preventive timer)

Wireless remote

controller

5 m or less

60° or less

30° or

less

30° or

less

Receiver

6 m or less

Remote control is

possible within this range

- 38 -

5.6 Standard running data:

SRK20MA-S

SRK25MA-S

SRK35MA-S

SRK50MA-S

High pressure (MPa)

Cooling - - - -

Heating

2.2~2.9

2.0~3.2

2.4~3.6

Low pressure (MPa) Cooling

1.0~1.2

0.9~1.2

0.8~1.2

Heating - - - -

Temp. difference

between inlet and

outlet air of indoor

unit (℃)

Cooling

9~10

9~11

8~14

10~16

Heating

9~15

9~16

10~21

10~22

Operating current (A)

Cooling

1.4~4.1

1.4~6.0

1.3~6.6

2.0~10.8

Heating

1.7~5.6

1.7~6.1

1.7~6.6

2.0~13.8

Notes: ① The above data complies with the standard:

and is measured at the following ambient temperature:

indoor side: cooling……27℃DB, 19℃WB; heating……20℃DB

outdoor side: cooling……35℃DB, 24℃WB; heating……7℃DB, 6℃WB

② The length of the pipe between the indoor and outdoor units is 5 meters in the test. The

length of the pipe supplied with the appliance may vary.

- 39 -

6. MAINTENANCE

6.1 Electrical parts failure diagnosis method (1) Precautions:

① Be sure to switch off the power before disassembling and checking the air conditioner.

Maintenance of the indoor unit should commence 1 minute after the power is switched off. With respect to maintenance of the outdoor unit, the major circuit (electrolytic capacitor), which may be charged, should be fully discharged before the maintenance.

② When removing the circuit board, do not vigorously press the circuit board or the bonded

parts.

③ When unplugging the plug connector, do not drag the electric wire and be sure to hold the plug

frame.

(2) Matters to be confirmed before diagnosis:

① Have you asked the user about the details of the failure?

② Does the air conditioner run? Does the self-diagnosis have any indication?

③ Is the voltage of the power socket correct?

④ Is the connection between the indoor and outdoor units wrong?

⑤ Is the outdoor refrigerant disconnecting valve opened?

(3) Procedure of diagnosis (when the air conditioner can’t run at all). When the air conditioner runs

but malfunctions, follow the procedure described in (4).

Important The air conditioner does not run at all when all of the following are met.

① The RUN lamp does not light up;

② The flap does not open;

③ The motor of the indoor fan does not rotate;

④ The self-diagnosis does not have indication.

- 40 -

Procedure of diagnosis (when the air

conditioner does not run at all)

* Correct voltage refers to the voltage between

198-242V.

Has the cable been

inserted into the power

supply with correct

voltage?

Check that the cable is inserted

into the correct power supply. Check the operation situation.

Yes

Switch off the power supply and open the flap manually.

Is the flap closed when the

cable is inserted into the

power supply?

Yes

Is the current protective tube

on the circuit board of the

indoor unit broken?

To “Check method for

circuit board”

If the bonded parts are

not damaged, replace the

protective tube and check

the operation situation.

Does the system issue

the sound for receiving

signals when the remote

controller operates?

Yes

Replace the indoor

circuit and check the

operation situation.

To “Remote controller

failure diagnosis method”

- 41 -

(4) Procedure of failure diagnosis (when the air conditioner can run)

Note: (1) When only stop data is indicated, the air conditioner is normal. However, when the same

protection is triggered repeatedly (more than 3 times), which becomes the user’s complaint, it should be judged according to the content of failure.

Confirm the content of failure of the user’s air conditioner.

Is the cause of error

confirmed?

Yes

Confirm the displaying of self-diagnosis.

Eliminate the cause of error and check the

operation situation.

Has the self-diagnosis been

conducted?

Use the maintenance mode to read the past

indication of self-diagnosis

Is there any history of

indication of self-diagnosis?

Use the maintenance mode to read the history

of stop due to the past protection control.

Is there any history of stop

due to protection control?

(1)

Specifically check the defective part against the content of failure according to the check

method.

Replace the defective part and check the

operation situation.

The air conditioner is normal.

- 42 -

(5) Indication of self-diagnosis

When the air conditioner stops abnormally, the cause is indicated with lamps. Three minutes after abnormal stop, use the remote controller to start the appliance. The error indication will disappear and the appliance will commence operation

(2)

Note: (2) It can’t be restarted with the remote controller 3 minutes after abnormal stop. The abnormal stop disappears when the power of the air conditioner is switched off.

Indoor indication

Content of error

Main cause

Indication (flash, light up) conditions

RUN lamp

TIMER lamp

Temp.

indication

Indoor unit

Sensors

Flash 1 time

Light up

Indoor heat exchanger sensor error

Wire break of indoor heat exchanger sensor, poor plug contacting

When the appliance does not operate after the power is switched on, the temperature measured is below -28℃ for over 15 min. No indication during operation.

During operation, the temperature measured is below -28℃ for over 40 min. The air conditioner stops and the error is indicated.

Flash 2 times

Light up

Room temperature sensor error

Wire break of room temperature sensor, poor joint contacting

When the appliance does not operate after the power is switched on, the temperature measured is below -45℃ for over 15 sec. No indication during operation.

Others

Flash 5 times

Light up

Input voltage error

Input voltage is too high or too low.

Flash 6 times

Light up

Indoor fan motor error

Defective indoor fan motor, poor plug contacting, defective indoor circuit board

When the indoor fan is operating, the rotate speed measured is below 300 rpm for over 30 sec. The air conditioner stops and the error is indicated.

- - 01

Display communication error

Break of display connecting wire, failure, poor joint contacting

Outdoor unit

Sensors

Continuous

flashing

Flash 1 time

Outdoor air temp. sensor error

Wire break of outdoor air temp. sensor, poor joint contacting

When the power is switched on , within 20 sec. during which the appliance does not operate or after the compressor runs for 2 min. ~ 2 min. and 20 sec., the temperature measured is below -55℃ for over 15 sec. No indication during operation.

Continuous

flashing

Flash 2 times

Outdoor heat exchanger liquid pipe sensor error

Wire break of outdoor heat exchanger liquid pipe sensor, poor joint connection

Continuous

flashing

Flash 4 times

Compressor vent-pipe sensor error

Wire break of vent-pipe sensor, poor joint contacting

When the rotational frequency of over 0 rps of outdoor unit lasts for 9 min.; the temperature measured by the vent-pipe sensor is below 7℃ for over 15 sec. After the compressor runs for 10 min. ~ 10 min. and 20 sec., the temperature measured is below -25 ℃ for over 15 sec. The air conditioner stops and the error is indicated.

Continuous

flashing

Flash 5 times

Air suction pipe sensor error (multi-split system)

Other s

Light up

Flash 1 time

Power cut for current protection

Missing phase, short circuit and lock of compressor, defective outdoor circuit board, defective EEV, disconnecting valve closed

When the compressor is started, the output current of the inverter (current of compressor) exceeds the setting The air conditioner stops and the error is indicated.

Light up

Flash 2 times

Outdoor unit error

No connection or wire break of compressor, disconnecting valve closed, over heat running of compressor, wire break of vent-pipe sensor, poor joint contacting, defective EEV, insufficient refrigerant

The current value of the motor in the initial excitation is lower than 1A; The compressor is forced to stop, which is caused by protection control of outdoor unit and which occurs over 3 times within 20 min. after power is switched on; Five sec. after the power is switched on, the DC voltage is abnormal (less than about DC210V); The voltage reduces when the compressor is running; The inverter stops immediately when the failure of outdoor unit is detected.

Light up

Flash 3 times

Current safety

Protection control of outdoor inverter

The input current value of the outdoor inverter exceeds the control value. The inverter stops immediately when the failure is detected.

Light up

Flash 4 times

Power module error

Short circuit of power transistor, Over current protection

Light up

Flash 5 times

Compressor over heat protection

To prevent over heat of compressor in running, deterioration of refrigerant, deterioration of refrigerating machine oil, winding damage of compressor motor, etc.

Temperature measured by vent-pipe sensor ≥ 110℃: the compressor stops; 100℃ ≤ Temperature measured by vent-pipe sensor < 110℃: the frequency of the compressor reduces; 90℃ ≤ Temperature measured by vent-pipe sensor < 100℃: the compressor keeps the frequency; Temperature measured by vent-pipe sensor <90℃: the inverter restores the regulation frequency.

Light up

Flash 6 times

Serial transfer error protection

Break of connecting wire, poor contacting, defective indoor and outdoor circuit boards, strong external interference

The indoor circuit board can’t receive signals from the

outdoor circuit board for 10 sec. after the power is switched on or for over 1 min. and 50 sec. at other times.

Light up

Flash 7 times

Outdoor fan error

Error of outdoor fan motor, poor joint contacting, defective outdoor circuit board

The rotational frequency of the outdoor fan motor is below 75 rpm for over 30 sec. and this occurs 3 times. The air conditioner stops and the error is indicated.

Light up

Continuous

flashing

Cool room high pressure protection control

When the temperature measured by the outdoor heat exchanger liquid pipe sensor is abnormal, the compressor stops or reduces to keep the frequency, etc.

Flash 5 times

Light up

Controllable silicon voltage error

Flash 7 times

Light up

Cooling cycle protection

Running with low refrigerant, running with disconnecting valve closed, poor 4-way valve switching, defective indoor sensor

Five min. after the compressor is started, the actual rotate

speed is ≥ 50 and the temperature measured by the indoor

sensor meets the following condition for 5 min.: Cooling (inlet air -4℃ < heat exchanger) or cooling (heat exchanger < inlet air +6℃).

Flash 2 times

Locked-rotor, rotor lock

Defective compressor, defective circuit board of outdoor unit

The state out of control is detected when the compressor is started. The inverter stops immediately after the detection.

- 43 -

(6) Service mode (failure mode reading function)

The air conditioner records the past error indication and protection stops (service data). If the indication of self-diagnosis can’t be confirmed, it can be confirmed through service data to grasp the condition when the error occurs.

(a) Terms

Term

Description

Service mode

Service mode refers to indicating service data with the lamp on the display board through the operation of the indoor controller described in (b).

Service data

Refers to the content of past error indication and protection stops of the air conditioner. The controller of the indoor unit uses nonvolatile memory (the data stored will not disappear even after the power is cut) to memorize the past error indication and protection stops of the air conditioner. Service data is composed of self-diagnosis data and stop data.

Self-diagnosis data

Refers to the indication data of causes of past stops of the indoor unit (self-diagnosis indication). Data of last 5 times can be memorized and the older data is deleted automatically. It also includes the temperatures measured by the various sensors (room temperature, indoor heat exchanger, outdoor liquid pipe, and outdoor temperature discharge pipe sensors) and information of the remote controller (operation switching and air flow changes). More detailed data can be confirmed.

Stop data

Data of causes of past stops due to protection control, etc. in the air conditioner. If only stop data is indicated, the system will be restored automatically. (The indication will be restored automatically after the appliance enters the stop mode normally). Data of last 10 times can be memorized and the older data is deleted automatically. (Important) If only stop data is indicated, the air conditioner is normal. However, when the same protection repeats (more than 3 times), it will become the cause of user’s complaint.

(b) Indication sequence of service modes

Begin

Temporarily switch off the power and wait over one

minute.

Press and hold the back-up switch and insert the cable

into the socket.

Yes

Does the buzzer on the indoor

unit sound?

*1: If the buzzer does not sound after several operations, the back-up switch may be defective.

Use the remote controller to send signals within one

minute after inserting the cable into the supply.

(*2)

*2: The settings of the remote

controller are “Cooling operation”, “Air flow: Me”, and “Set temperature:

21℃).

Count the flashing and going off of the RUN lamp and

TIMER lamp

(*3)

, and confirm the content of failure in the

list.

Is there any other data

Restart the appliance more than one

minute after the power is switched off

and the maintenance mode is ended.

Yes

Make changes according to the remote controller setting

list.

(*4)

- 44 -

*3: Counting of flashing in service mode: 1.5 sec. light-up (beginning signal) and number of

continuous flashes (Number of continuous flashes excluding the 1.5 sec. light-up (beginning signal)).

● Safe current (heating safety I) (for example, the stop code is “32”) RUN lamp (tens place) flashes 3 times and TIMER lamp (ones place) flashes 2 times: 3 x 10 + 2 x 1 = 32. The code 32 “Safe current (heating safety I)” can be read from the list.

*4: In the service mode, set the remote controller (operation switching, air flow setting, and temperature setting) according to the table below. When sending signals to the main frame of the air conditioner, the service data indication will change.

① Self-diagnosis data

What is self-diagnosis data? Refers to the indication data of causes of past stops of the indoor unit (self-diagnosis indication). Data of last 5 times can be memorized and the older data is deleted automatically. It also includes the temperatures measured by the various sensors (room temperature, indoor heat exchanger, outdoor liquid pipe, and outdoor temperature discharge pipe sensors) and information of the remote controller (operation switching and air flow changes). More detailed data can be confirmed. As shown in the table below, for different operating modes, temperature settings and air flow settings of the remote controller, different contents are indicated.

Settings of remote controller

Content of output data

Operation

switching

Air flow

switching

Cooling

Indicates the causes of past stops (error code) indicated in the past

Indicates the temperature measured by the room temperature sensor when the error code was indicated

Auto

Indicates the temperature measured by the indoor heat exchanger sensor when the error code was indicated

Heating

Indicates the information on the remote controller when the error code was indicated

Indicates the temperature measured by the outdoor air temp. sensor when the error code was indicated

Indicates the temperature measured by the outdoor heat exchanger sensor when the error code was indicated

Auto

Indicates the temperature measured by the discharge pipe sensor when the error code was indicated

Setting of remote

controller

Indicates the time number

of indication data of

previous errors

Temperature setting

21℃

Last time

22℃

Second to last time

23℃

Third to last time

24℃

Fourth to last time

25℃

Fifth to last time

(Example)

Settings of remote controller

Indication data

Operation

switching

Air flow

switching

Temperature

setting

Cooling

21℃

Indicates the cause of stop indicated last time (error code)

22℃

Indicates the cause of stop indicated second to last time (error code)

23℃

Indicates the cause of stop indicated third to last time (error code)

24℃

Indicates the cause of stop indicated fourth to last time (error code)

25℃

Indicates the cause of stop indicated fifth to last time (error code)

RUN lamp

(tens place)

TIMER lamp

(ones place)

1.5 sec.

0.5 sec.

11 sec. cycle

- 45 -

② Stop data

Settings of remote controller

Indication data

Operation

switching

Air flow

switching

Temperature

setting

Cooling

21℃

Indicates the cause of the last stop due to protection control, etc. (stop code)

22℃

Indicates the cause of second to last stop due to protection control, etc. (stop code)

23℃

Indicates the cause of third to last stop due to protection control, etc. (stop code)

24℃

Indicates the cause of fourth to last stop due to protection control, etc. (stop code)

25℃

Indicates the cause of fifth to last stop due to protection control, etc. (stop code)

26℃

Indicates the cause of sixth to last stop due to protection control, etc. (stop code)

27℃

Indicates the cause of seventh to last stop due to protection control, etc. (stop code)

28℃

Indicates the cause of eighth last stop due to protection control, etc. (stop code)

29℃

Indicates the cause of ninth to last stop due to protection control, etc. (stop code)

30℃

Indicates the cause of tenth to last stop due to protection control, etc. (stop code)

No. of flashes in

service mode

Stop

code or

error

code

Content of

failure

Cause

Conditions

Error

indication

Automatic

restoration

RUN lamp (tens

place)

TIMER

lamp (ones

place)

Category

Class

Flash 4 times

Flash 1 time

Safe current

Cooling overload 1 (outdoor temp. 36~40℃)