Mitsubishi SRK09CH, SRK10CHV-4, 12CH, 13CHV-4 Technical Manual

ROOM AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

WALL MOUNTED TYPE
ROOM AIR-CONDITIONER
(Split system, air cooled cooling only type)

SRK09CH, 12CH
SRK10CHV-4, 13CHV-4

TECHNICAL MANUAL

1. SRK09CH, 12CH ........................................................... 1

2. SRK10CHV-4, 13CHV-4 .............................................. 33

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( )

1. SRK09CH, 12CH

WALL MOUNTED TYPE
ROOM AIR-CONDITIONER

Split system, air cooled
cooling only type

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CONTENTS

1.1 GENERAL INFORMATION ......................................................................... 3

1.1.1 Specific features ..................................................................................... 3

1.1.2 How to read the model name ................................................................. 3

1.2 SELECTION DATA ...................................................................................... 4

1.2.1 Specifications ......................................................................................... 4

1.2.2 Range of usage & limitations ................................................................ 6

1.2.3 Exterior dimensions ................................................................................ 6

1.2.4 Piping system ......................................................................................... 8

1.2.5 Selection chart ........................................................................................ 9

1.3 ELECTRICAL DATA .................................................................................. 10

1.3.1 Electrical wiring ..................................................................................... 10

1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............. 11

1.4.1 Operation control function by remote control switch ....................... 11

1.4.2 Unit ON/OFF button .............................................................................. 12

1.4.3 Power blackout auto restart function ................................................. 12

1.4.4 Custom cord switching procedure ..................................................... 13

1.4.5 Flap control ........................................................................................... 13

1.4.6 Timer operation..................................................................................... 14

1.4.7 Outline of cooling operation ................................................................ 15

1.4.8 Outline of dehumidifying operation .................................................... 16

1.4.9 Outline of automatic operation ........................................................... 17

1.4.10 Outline of fan operation ....................................................................... 17

1.4.11 Outline of clean operation ................................................................... 17

1.4.12 Protective control function .................................................................. 18

1.5 APPLICATION DATA ................................................................................. 19

1.5.1 Selection of location for installation ................................................... 20

1.5.2 Installation of indoor unit .................................................................... 21

1.5.3 Installation of outdoor unit .................................................................. 24

1.5.4 Connection of refrigerant pipings ....................................................... 24

1.5.5 Installation of remote control switch .................................................. 25

1.5.6 Earthing work ........................................................................................ 25

1.5.7 Test run ................................................................................................... 26

1.5.8 Precautions for wireless remote control installation and

operation ............................................................................................... 26

1.6 MAINTENANCE DATA .............................................................................. 27

1.6.1 Trouble shooting .................................................................................. 27

1.6.2 Servicing ................................................................................................ 31

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1.1 GENERAL INFORMATION

1.1.1 Specific features

The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit

consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling equip-

ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.

(1) Remote control flap

The flap can be automatically controlled by operating wireless remote control.

¡ Flap swing : The flaps swing up and down successively.

¡ Memory flap : Once the flap position is set, the unit memorizes the position and continues to operate at the same position from

the next time.

(2) Automatic operation

When the remote control switch is set on “auto(

) ”, it will either automatically decide operation mode such as cooling and

thermal dry, or operate in the operation mode before it has been turned to automatic control.

(3) Self diagnosis function

¡ We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as

follows.

TIMER lightRUN light

Room temperature sensor error

Indoor fan motor error

Heat exchanger sensor error

2 time flash

6 time flash

TIMER light

ON

Trouble of outdoor unit

2 time flash

RUN light

ON

1 time flash

1.1.2 How to read the model name

Example : SR K 09 C H

Series No.

Cooling only type

Product capacity

Wall mounted type

Split type room air-conditioner

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1.2 SELECTION DATA

1.2.1 Specifications

Model SRK09CH (Indoor unit)

SRC09CH (Outdoor unit)

(2) The operation data are applied to the 220 V or 230 V districts respectively.

(3) The refrigerant quantity to be charged includes the refrigerant in 7.5 m connecting piping.

(Purging is not required even in the short piping.)

If the piping length is longer, when it is 7.5 to 15 m, add 10 g refrigerant per meter.

(4) Expressed in sound pressure level.

Notes (1) The data are measured at the following conditions.

Item

Model

SRK09CH SRC09CH

kW 2.64

Cooling capacity

(1)

BTU/h 9000

Power source 1 Phase, 220/230V, 50Hz

Cooling input kW 0.90

Running current (Cooling) A 4.2

Inrush current A 18

COP (In cooling) 2.93

Noise level

(4)

dB 41 49

Exterior dimensions

mm 268 × 790 × 224 540 × 645 × 245

Height × Width × Depth

Color Fine snow Polar white

Net weight kg 8.0 27

Refrigerant equipment

–

RSA201A034

Compressor types & Q’ty

Motor kW – 0.68

Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Louver fins & grooved tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

kg R22 0.43 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R 0.28 (SUNISO 4GSI or ATMOS NM56)
Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 22

Air flow (at High) CMM 9.0 24

Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––
Operation control

Wireless-Remote control –

Operation switch

Room temperature control Microcomputer thermostat –

Pilot lamp RUN (Green), TIMER (Yellow),

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Thermostat (for compressor)

Fan motor error protection

O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø9.52 (3/8")

Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m

–

Gas line : 0.33 m

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Recommended breaker size A 20

Size × Core number 1.5 mm2 × 3 cores (Including earth cable)

Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

Connection
wiring

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27°C19°C35°C24°C ISO-T1, JIS C9612

(220/230V)

Operation

data

(1)

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(2) The operation data are applied to the 220 V or 230 V districts respectively.

(3) The refrigerant quantity to be charged includes the refrigerant in 7.5 m connecting piping.

(Purging is not required even in the short piping.)

If the piping length is longer, when it is 7.5 to 15 m, add 10 g refrigerant per meter.

(4) Expressed in sound pressure level.

Notes (1) The data are measured at the following conditions.

Item

Model

SRK12CH SRC12CH

kW 3.37

Cooling capacity

(1)

BTU/h 11500

Power source 1 Phase, 220/230V, 50Hz

Cooling input kW 1.10

Running current (Cooling) A 5.1

Inrush current A 29

COP (In cooling) 3.06

Noise level

(4)

dB 42 49

Exterior dimensions

mm 268 × 790 × 224 540 × 780 × 290

Height × Width × Depth

Color Fine snow Stucco white

Net weight kg 8.5 33

Refrigerant equipment

–

RSA201A035

Compressor types & Q’ty

Motor kW – 1.0

Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

kg R22 0.63 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R 0.41 (SUNISO 4GSI or NM56M)
Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 22

Air flow (at High) CMM 10.0 32

Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––
Operation control

Wireless-Remote control –

Operation switch

Room temperature control Microcomputer thermostat –

Pilot lamp RUN (Green), TIMER (Yellow),

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Thermostat (for compressor)

Fan motor error protection

O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")

Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m

–

Gas line : 0.33 m

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Recommended breaker size A 20

Size × Core number 1.5 mm2 × 3 cores (Including earth cable)

Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

Connection
wiring

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27°C19°C35°C24°C ISO-T1, JIS C9612

Model SRK12CH (Indoor unit)

SRC12CH (Outdoor unit)

(220/230V)

Operation

data

(1)

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1.2.2 Range of usage & limitations

1.2.3 Exterior dimensions

Indoor return air temperature
(Upper, lower limits)

Refrigerant line (one way) length Max. 15m

All models

Refer to the selection chart

Power source voltage Rating ± 10%

Voltage at starting Min. 85% of rating

Frequency of ON-OFF cycle Max. 10 times/h

ON and OFF interval Max. 3 minutes

Outdoor air temperature
(Upper, lower limits)

Vertical height difference between
outdoor unit and indoor unit

Max. 5m (Outdoor unit is higher)
Max. 5m (Outdoor unit is lower)

Item

Models

(1) Indoor unit

Models SRK09CH, 12CH

Unit: mm

Piping hole (ø65)

( )

Piping hole (ø65)

53.5

09 :ø9.52
12 :ø12.7

Piping for Gas

53.5

44.5

7.5

44.5

43.2

39.3

202450138

133.5450206.5

102.5

585

102.5

252.2

8.3

200

380.6

Piping for Liquid 448.6 (ø6.35)

Drain hose 520 (ø16)

45

45

60

17.5

60

27

788

VIEW A

45

2.1

960

124

224 

3

Terminal block

Piping hole right(left)

268

790

A

→

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Model SRC12CH

Unit: mm

Terminal block

ø12.7 (1/2")

ø6.35 (1/4")

Flare connecting

Service valve (Gas)

Service valve (Liquid)
Flare connecting

Drain holes

2-16×12

138.4

40°

61.9

18.9165.1510104.9

439.1

111.4

99.4

349.5

313.1

43.1

290

12

50

350

23.5312.514

33.5

40°

42.595.9

14

540

780

Unit: mm

(2) Outdoor unit

Model SRC09CH

192.5

372.5

82.5

480

82.5

61.5

2

-

Ø

12

Terminal
block

127.7

33.3

40˚

40˚

645

Drain holes

Service valve (Gas)
Flare connecting

Ø

9.52 (3/8˝)

Service valve (Liquid)
Flare connecting

Ø

6.35 (1/4˝)

50

12

42

13.5

274.5

300

12

23

44

245

540

100.3 39.7

14.4

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1.2.4 Piping system

Model SRK09CH

Model SRK12CH

Outdoor unitIndoor unit

Room temp.
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Piping
(Liquid)
ø6.35

Check joint

Service valve (Liquid)

Flare connecting

Cooling cycle

Heat
exchanger

Compressor

Accumulator

Service valve
(Gas)

Capillary tube

Piping
(Gas)
ø9.52

Outdoor unitIndoor unit

Room temp.
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Piping
(Liquid)
ø6.35

Check joint

Service valve (Liquid)

Flare connecting

Cooling cycle

Heat
exchanger

Compressor

Capillary tube

Accumulator

Service valve
(Gas)

Capillary tube

Piping
(Gas)
ø12.7

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1.2.5 Selection chart

Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way.

Net capacity = Capacity shown on specification ✕ Correction factors as follows.

(1) Coefficient of cooling capacity in relation to temperatures

(2) Correction of cooling capacity in relation to one way length of refrigerant piping

It is necessary to correct the cooling capacity in relation to the one way piping length between the indoor and outdoor units.

14 16 18 20 22

15

20

25

30

35

40

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

43

24

ISO-T1 Standard ConditionIndoor air W.B. temperature °C W.B.

Cooling

Applicable range

Coefficient of cooling

capacity in relation

to temperature

Cooling operation

Outdoor air D.B.

temperature

°C D.B.

Piping length [m]

Cooling

7

1.0

10

0.99

15

0.975

How to obtain the cooling capacity

Example : The net cooling capacity of the model SRK12CH with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C and

outdoor dry-bulb temperature 35˚C is Net cooling capacity =

SRK12CH

(11213 BTU/h)

Length 15m

Factor by air
temperatures

(11500 BTU/h)

3370W 0.975

1.0

3286 W

✕✕

=

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1.3 ELECTRICAL DATA

1.3.1 Electrical wiring

Models SRK09CH, 12CH

51C

BK

BK

BL

Y/G

T

BK

BK

WH

WH

BR

OR

WH

WH

RD

WH

BK

2

09CH

only

3

1

Sh

CFo

Cc

OR

Outdoor unit

Indoor unit

1

2

BK Black

BL Blue

BR Brown

LB Light blue

YE Yellow

RD Red

OR Orange

WH White

Y/G Yellow/Green

Color symbol

Symbol Parts name Symbol Parts name

C

C

Capacitor for CM

FM Flap motor

CF

I

Capacitor for FM

I

,Th

12

Sensor

CF

O

Capacitor for FM

O

T Terminal block

CM Compressor motor

ZNR Varistor

F Fuse

51C Motor protector for CM

FM

I

Fan motor (Indoor unit)

52C Magnetic contactor for CM

FM

O

Fan motor (Outdoor unit)

Meaning of marks

Notes (1) : denotes magnetized relay

×

: denotes demagnetized relay

(2) Th

1

is room temperature sensor. Th2 (the heat exchanger sensor) is frost prevention sensor.

Operation

Cooling

Relay symbol Control part

52C CM

Table of relay operations

M

1〜

M

3〜

U

M

FM

Power source
220/230V 50Hz

YG

LB

BR

Printed circuit board

T

WH
BK

Th1

Th2

Wireless
R-Amp

Display

CNE

CNG

YE
WH
RD

M

CNW

IC15

ZNR

1
5
3

CNU

CF

I

52C-3 52C-4

52C

F
250V 3.15A

CONTROL BOX

1

2

Back up Sw

CNM

N

t°

t°

1〜

FMI

FMo CM

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1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

1.4.1 Operation control function by remote control switch

Remote control

Models SRK09CH, 12CH

◆ Operation selection

◆ Indication selection

FAN SPEED button

Each time the button is pushed, the
indicator is switched over in turn.

•

The above illustration shows all controls, but in practice
only the relevant parts are shown.

OPERATION MODE select button

Each time the button pushed, the
indicator is switched over in turn.

ON/OFF (luminous) button

Press for starting operation, press again
for stopping.

HI POWER/ECONO button

This button changes the HIGH POWER/
ECONOMY mode.

AIR FLOW (UP/DOWN) button

This button changes the air flow (up/down) mode.

SLEEP button

This button selects SLEEP operation.

CLEAN switch

This switch changes the CLEAN mode.

ON TIMER button

This button selects ON TIMER operation.

This button cancels the ON timer, OFF
timer, and SLEEP operation.

CANCEL button

RESET switch

Switch for resetting microcomputer and
setting time.

SLEEP indicator

Indicates during SLEEP operation.

TEMPERATURE indicator

Indicates set temperature.
(Does not indicate temperature when operation
mode is on AUTO)

FAN SPEED indicator

Indicates set air flow rate with lamp.

CLEAN indicator

Indicates during CLEAN operation.

ON/OFF TIMER indicator

Indicates during ON/OFF TIMER operation.

AIR FLOW indicator

Shows selected flap mode.

HI POWER/ECONO MODE indicator

Indicates during HIGH POWER/ECONOMY
mode operation.

[

OPERATION MODE indicator

Indicates selected operation with lamp.

(Auto)•(Cool)• (Fan) •(Dry)]

OFF TIMER button

This button selects OFF TIMER operation.

TEMPERATURE button

This button sets the room temperature.
(This button changes the present time and
TIMER time.)

TIME indicator

Indicates present time or timer setting time.

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Unit indication selection

Models SRK09CH, 12CH

Unit ON/OFF button

1.4.2 Unit ON/OFF button

When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the

unit on and off.

(1) Operation

Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off.

(2) Details of operation

The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor),

whether to go into the cooling or thermal dry modes.

Function

Room temperature

Operation mode

setting

Fan speed Flap

Timer switch

Cooling About 23ºC

Thermal dry About 24ºC

Auto Auto

Continuous

1.4.3 Power blackout auto restart function

(1) Power blackout auto restart function is a function that records the operational status of the air-conditioner immediately prior to it

being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored.

(2) The following settings will be cancelled:

(a) Timer settings

(b) High-power operations

Notes (1) The power blackout auto restart function is set at on when the air-conditioner is shipped from the

factory. Consult with your dealer if this function needs to be switched off.

(2) When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.

(3)

If the jumper wire (J7) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right)

Jumper wire (J7)

RUN light (green)

Illuminates during operation
and ‘CLEAN operation’.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HIGH POWER operation.

ECONO light (orange)

Illuminates during ECONOMY operation.

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1.4.4 Custom cord switching procedure

If two wireless remote controls are installed in one room, in order to prevent wrong operation

due to mixed signals, please modify the printed circuit board in the indoor unit’s control box

and the remote control using the following procedure. Be sure to modify both boards. If only

one board is modified, receiving (and operation) cannot be done.

(1) Modifying the indoor unit’s printed circuit board

Take out the printed circuit board from the control box and cut off jumper wire (J6)

using wire cutters.

After cutting of the jumper wire, take measures to prevent contact with the other the lead

wires, etc.

(2) Modifying the wireless remote control

(a) Remove the battery.

(b) Cut the jumper wire shown in the figure at right.

Jumper wire (J6)

1.4.5 Flap control

Control the flap by AIRFLOW button on the wireless remote control.

(1) Swing flap

Flap moves in upward and downward directions continuously.

(2) When not operating

The flap returns to the position of air flow directly below, when operation has stopped.

(3) Memory flap (Flap stopped)

When you press the AIRFLOW button once while the flap is operating, it stops swinging at an angle. Since this angle is memorized

in the microcomputer, the flap will automatically be set at this angle when the next operation is started.

¡ Recommendable stopping angle of the flap

Horizontal
blowing

COOL•DRY

Cut

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14

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¡ If the difference (= Room temperature – Setting tempera-

ture) is 4°C, the correction value is found to be +5 min­utes from the table shown above so that the starting time
of next operation is determined as follows:

15 min. earlier + 5 min. = 20 min. earlier

↑↑

Current operation

Correction value

start time

Corrects the starting time of next operation by
calculating the temperature difference.

(Example) Cooling

Room temperature

Setting temperature

Operation starting time

Time

Setting time

15 min. 10 min. 5 min.
earlier earlier earlier

Start

Timer operation
(time)

Temperature
setting (˚C)

Cooling

(2) Sleep timer operation

Pressing the SLEEP button causes the temperature to be controlled as shown in the following chart with respect to the set tempera-

ture.

+

1.0

0

-1.0

0 1.0 2.0

1.4.6 Timer operation

(1) Comfortable timer setting (ON timer)

If the timer is set at ON when the operation select switch is set at the cooling, or the cooling in auto mode operation is selected, the

comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the

relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.

(Max. 60 minutes)

Operation mode Operation start time correction value (Min.)

3 < Room temp. – Setting temp. 1 < Room temp. – Setting temp.

<
=

3 Room temp. – Setting temp.

<
=

1

At cooling

+5 No change –5

Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th1).

(2) This function does not actuate when the operation select switch is set at the dehumidifying as well as the dehumidifying in the auto mode.

However, the operation of item (1) above is performed during the dehumidifying in the auto mode.

(3) During the comfortable timer operation, both the run light and timer light illuminate and the timer light goes off after expiration of the timer, ON setting time.

(3) OFF timer operation

The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period.

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15

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1.4.7 Outline of cooling operation

(1) Operation of major fanctional components

(2) Fan speed switching

(a) Auto fan control

The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the

room temperature sensor) and the thermostat setting as shown below.

(3) Thermostat operation

The compressor and outdoor fan and turned on and off as shown below according to the temperature setting.

(4) HIGH POWER operation ( “HI POWER” button on the remote control : ON)

The following operation is performed for 15 minutes without relation to the set temperature or fan speed setting.

(5) ECONOMY operation ( “ECONO” button on the remote control : ON)

The set temperature changes as shown at right, and the

indoor unit fan speed is set on speed 2.

Notes (1) Room temperature is not adjusted during the HIGH POWER operation.

(2) Protective functions will actuate with priority even during the HIGH POWER

operation.

Indoor fan motor

Flap

Display

52C

Outdoor fan motor

ON

ON or OFF

Lights up

OFF

OFF

ON

ON or OFF

Lights up

ON

ON

OFF

Stop position control

Lights up or flashes

OFF

OFF

When the compressor

command is OFF

When the compressor

command is ON

When the compressor goes

OFF due to an anomalous stop.

Functional
components

Item

Swing flap

Swing stop

Auto fan control

Speed 5

Speed 5

Speed 3

Speed 3

AUTO HIGH MED

Speed 2

Speed 2

LOW

Flow control

Fan speed switching

Speed 4

Speed 3

Speed 2

Thermostat setting point

Speed 5

+1 +2 +3 +4

OFF

ON

Set temp.

-1

Room temp.

Compressor
Outdoor fan

Indoor unit fan

Outdoor unit fan

Compressor

Speed 6 fixed

ON

ON

Running time

Running start ~ 1 hour

1~2 hours

2 hours ~

Set temperature compensation

Set temperature +0.5

Set temperature +1.0

Set temperature +1.5

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16

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Note (1) Thermostat operation is performed in A, B Block. When compressor and indoor fan stop by thermostat operation within 12 minutes from start, temperature

check is performed by operating indoor fan at speed 1 for 20 seconds before finishing 12 minutes and allowing decision of next operation block.

(3) DRY operation

After finishing start up operation described in (2) above, thermal dry operation is performed at 8 minutes intervals, according to the

difference between room temperature and thermostat setting temperature as shown below.

Beside, 1 cycle of this operating time consists of 8 minutes, 7 cycle operation is performed then.

1.4.8 Outline of dehumidifying operation

(1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as

shown below.

¡ Operation block area

(2) Start up operation

ON

OFF

OFF

0

3

6

912

ON

OFF

OFF

0

12

Compressor
and
outdoor fan

Speed 2

Indoor fan

Start Temperature check

Start

Temperature check

Compressor
and
outdoor fan

Indoor fan

Operation block decision

C.D Block

A.B Block

minutes

minutes

Speed 2

Speed 1

20
seconds

ON

OFF

OFF

0

4

8

ON

OFF

OFF

0

8

Compressor
and
outdoor fan

Indoor fan

D Block

Compressor
and
outdoor fan

Indoor fan

C Block

Compressor
and
outdoor fan

Indoor fan

B Block

Compressor
and
outdoor fan

Indoor fan

A Block

20 seconds

20 seconds

minutes

minutes

Start Temperature check Start Temperature check

Operation block decision

20 seconds

minutes

minutes

Start Temperature check Temperature check

Operation block decision

Start

Speed 1

Speed 1

OFF

OFF

0

8

ON

OFF

OFF

0

3

8

Speed 1

Speed 2

Running time

Running start ~ 1 hour

1~2 hours

2 hours ~

Set temperature compensation

Set temperature +0.5

Set temperature +1.0

Set temperature +1.5

(4) ECONOMY operation ( “ECONO” button on the remote control : ON)

The set temperature changes as shown at right, and the

indoor unit fan speed is set on speed 2.

D Block C Block B Block A Block

–2 0 +3

Room temp. – Setting temp.(deg)

Speed 2

Speed 2

-

17

-

1.4.9 Outline of automatic operation

(1) Determination of operation mode

The blow operation of the indoor fan is carried out at the 1st speed for 20 seconds and the room temperature is checked to

determine the operation mode automatically. (When the unit is operated by the turn-on timer, the blow operation is not carried out.)

1.4.10 Outline of fan operation

(1) Operation of major fanctional components

(2) HIGH POWER operation (“HI POWER” button on the remote control : ON)

The following operation is performed for 15 minutes without relation to the set fan speed.

52C

Indoor fan motor

Outdoor fan motor

Flap

Speed 6 Speed 5 Speed 4

OFF

OFF

ON or OFF

Speed 3 Speed 2 Speed 1

HIGH

POWER

AUTO HIGH MED LOW ECONOMY

Functional
components

Fan speed switching

Indoor unit fan

Outdoor unit fan

Compressor

Speed 6 fixed

OFF

OFF

Note (1) Protective functions will actuate with priority even during the HIGH POWER operation.

Room temperature<26°C26°C

<
=

Room temperature

Operation mode Dry Cooling

(2) Within 30 minutes after either auto or manual operation stops, if auto operation is started, or if you switch to auto operation during

manual operation, the system runs in the previous operation mode.

(3) The temperature is checked 1 time in 30 minutes after the start of operation, and if the judgment differs from the previous operation

mode, the operation mode changes.

(4) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of the

wireless remote control and the setting temperature.

Signals of wireless remote control (Display)

–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6

Setting Cooling 17 18 19 20 21 22 23 24 25 26 27 28 29

temperature Dehumidifying 18 19 20 21 22 23 24 25 26 27 28 29 30

1.4.11 Outline of clean operation

COOL,DRY,AUTO (COOL,DRY); after operation has stopped, the moisture inside the dryer air conditioner, controls the production of

fungus etc.

(1) Operating condition

‘Clean’ is switched ON, when the air conditioner receives a STOP signal.

(2) Detail of operation

(3) Reset condition

When control finishes 120 minutes after the Clean operation starts. When the stop signal is received from the remote control.

Compressor OFF

Indoor fan motor Speed 1

Outdoor fan motor OFF

Flap Fully closed

-

18

-

1.4.12 Protective control function

(1) Frost prevention for indoor heat exchanger [Preventing frost accumulation on the indoor heat exchanger]

During the Cooling or Dry operation in low room air temp. condition, evaporating temperature will decrease and consequently

indoor heat exchanger sometimes gets clogged with frost (or ice).

In order to prevent this trouble, compressor is stopped by under mentioned condition by indoor heat exchanger sensor (Th

2) and

timer (built into microcomputer circuit) functions.

Also indoor fan is changed over to protects the fan tap just before frost prevention control.

CM, FM

O stoppage condition

1 Temperature of heat exchanger is

2.5˚C or lower.

2 As least 3 minutes has passed since

the compressor started.

Indoor heat exchanger
temperature (˚C)

CM, FMO re-starting condition

1 Te mperature of heat exchanger is

8˚C or higher.

Set fan
speed

Protects
the fan
tap just
before
frost
prevention
control

(2) Three-minute forced operation

When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the

operation mode. (After 3 minutes has passed the thermal operation is effective.)

However, stopping the compressor via a stop signal or protection control has priority.

(3) Self diagnosis function

When something abnormal happens on the outdoor unit, indoor unit fan motor and each sensor (heat exchanger, room temperature),

it will be indicated by flashing lights.

(a) Abnormality of outdoor unit: When the indoor heat exchanger temperature does not fall to 25°C or below for 40 minutes

after 5 minutes have elapsed since the compressor operation start, the abnormality stop

occurs. (The timer light flashes 2 times.)

(b) Abnormality of indoor fan motor: The indoor fan motor revolves at a rate under 300 rpm for 30 seconds or longer, the

RUN light will flash.

(c) Abnormality of heat exchanger sensor: RUN light will flashing when the input temperature of the heat exchanger

sensor measures less than –20°C for more than 15 seconds with the air

conditioner “OFF”. (will not flashing during operation)

(d) Abnormality room temperature sensor: RUN light will flashing when the input temperature of the room temperature

sensor measures less than –20°C for more than 15 seconds with the air

conditioner “OFF”. (will not flashing during operation)

Note (1) If the above abnormalities happen concurrently, the light will flashing in the order of item number (a) through (d) above.

2.5 8

-

19

-

1.5 APPLICATION DATA
SAFETY PRECAUTIONS

¡ Please read these “Safety Precautions” first then accurately execute the installation work.

¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points

which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the

WARNING section. However, there is also a possibility of serious consequences in relationship to the points listed in the

CAUTION section as well. In either case, important safety related information is indicated, so by all means, properly observe all

that is mentioned.

¡ After completing the installation, along with confirming that no abnormalities were seen from the operation tests, please explain

operating methods as well as maintenance methods to the user (customer) of this equipment, based on the owner’s manual.

Moreover, ask the customer to keep this sheet together with the owner’s manual.

WARNING

¡ To disconnect the appliance from the mains supply this appliance must be connected to the mains by means of

a circuit breaker or a switch (use a recognized 20A) with a contact separation of at least 3mm.

¡ The appliance shall be installed in accordance with national wiring regulations.
¡ This system should be applied to places as households, residences and the like. Application to inferior environ-

ment such as engineering shop could cause equipment malfunction.

¡ Please entrust installation to either the company which sold you the equipment or to a professional contractor.

Defects from improper installations can be the cause of water leakage, electric shocks and fires.

¡ Execute the installation accurately, based on following the installation manual. Again, improper installations can

result in water leakage, electric shocks and fires.

¡ For installation, confirm that the installation site can sufficiently support heavy weight. When strength is insuffi-

cient, injury can result from a falling of the unit.

¡ For electrical work, please see that a licensed electrician executes the work while following the safety standards

related to electrical equipment, and local regulations as well as the installation instructions, and that only exclu­sive use circuits are used.
Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks
and fires.

¡ Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted

to the terminal connection part, through properly securing it improper connection or securing can result in heat
generation or fire.

¡ Take care that wiring does not rise upward, and accurately install the lid/service panel.It’s improper installation

can also result heat generation or fire.

¡ When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the

designated refrigerant (R22) within the refrigeration cycle.
Rupture and injury caused by abnormal high pressure can result from such mixing.

¡ Always use accessory parts and authorized parts for installation construction. Using parts not authorized by this

company can result in water leakage, electric shock, fire and refrigerant leakage.

¡ Ventilate the work area when refrigerant leaks during the operation.

Coming in contact with fire, refrigerant could generate toxic gas.

¡ Confirm after the foundation construction work that refrigerant does not leak.

If coming in contact with fire of a fan heater, a stove or movable cooking stove, etc., refrigerant leaking in the
room could generate toxic gas.

CAUTION

¡ Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a telephone

ground wire.
Improper placement of ground wires can result in electric shock.

¡ The installation of an earth leakage breaker is necessary depending on the established location of the unit.

No installing an earth leakage breaker may result in electric shock.

¡ Do not install the unit where there is a concern about leakage of combustible gas.

The rare even of leaked gas collecting around the unit could result in an outbreak of fire.

¡ For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it

to prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items.

¡ Install the outdoor unit so that the aluminum fins on the air heat exchanger cannot be touched. Failure to

observe this may result in injury.

¡ Do not place objects near the outdoor unit or allow leaves to gather around the unit. If there are objects or leaves

around the outdoor unit, small animals may enter unit and contact electrical parts resulting in break down,
emission of smoke or flame.

-

20

-

1.5.1 Selection of location for installation

(1) Indoor unit

(a) Where there is no obstructions to the air flow and where the cooled

air can be evenly distributed.

(b) A solid place where the unit or the wall will not vibrate.

(c) A place where there will be enough space for servicing. (Where

space mentioned right can be secured)

(d) Where wiring and the piping work will be easy to conduct.

(e) The place where receiving part is not exposed to the direct rays of

the sun or the strong rays of the street lighting.

(f) A place where it can be easily drained.

(g) A place separated at least 1m away from the television or the radio.

(To prevent interference to images and sounds.)

(2) Outdoor unit

(a) A place where good air circulation can be obtained and where rain, snow or sunshine will not directly strike the unit.

(b) A place where discharged hot air or unit’s operating sound will not be a nuisance to the neighborhood.

(c) A place where servicing space can be secured.

(d) A place where vibration will not be enlarged.

* Avoid installing in the following places.

•A place near the bedroom and the like, so that the operation noise will cause no trouble.

•A place where there is possibility of flammable gas leakage.

•A place exposed to strong wind.

(e) Do not install the unit near the seaside, or where there is possibility of chlorine gas generation.

Model

All models

Item
One way piping length (R) 15 m

Outdoor
unit is lower

5 m

Outdoor unit
is higher

5 m

Notes (1) Blowing out port and suction port on the back side of the unit can be

installed at a distance of 10cm from walls.

In case the barrier is 1.2m or above in height, or is overhead, the

sufficient space between the unit and wall shall be secured.

(2) When the unit is installed, the space of the following dimension and

above shall be secured.

(3) Limitations for one way piping length and vertical

height difference.

(

)

Vertical height
difference (h)

6.5 cm

5 cm

10 cm

60 cm MIN
(09 type: 30 cm MIN)

Air intake

10 cm MIN

10 cm
MIN

Air outlet

Air
intake

No obstacles
(Service
space for
electrical
parts)

r

h

Right
side

Left
side

-

21

-

Adjustment of the installation board in the horizontal
direction is to be conducted with four screws in a
temporary tightened state.

1.5.2 Installation of indoor unit

(1) Installation of installation board

(a) Fixing of installation board

(2) Drilling of holes and fixture sleeve (Option Parts)

When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use pipe hole sleeve sold separately.

(a) Drill a hole with ø65

whole core drill

(b) Adjusting sleeve length

Adjust so that board will be level by turning the board
with the standard hole as the center.

Standard hole

(c) Install the sleeve

(Inserting sleeve) (*Sleeve + *Inclined + *Sealing plate)

Note (1) Drill a hole with incline of 5 degree from

indoor side to outdoor side.

Indoor side Outdoor side

Cut off the sleeve
collar in case of
drawing piping out
to rear.

Cut off the sleeve
collar that can be
seen from beneath
the unit.

Wall thickness

+ 1.5 cm

Indoor side Outdoor side

Turn to
tighten

Paste

View of sleeve when installed

Inclined
flange

Sealing
plate

Sleeve

Indoor side Outdoor side

Look for the inside wall structures (Intersediate support or
pillar and firaly install the unit after level surface has been
checked.)

Mating mark for level surface

450

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit : mm

Piping hole( 65) Piping hole( 65)

Installation board

Indoor unit

53.5

Piping for Gas 380.6

Piping for Liquid 448.6

Drain hose 520( 16)

53.5

Space *

for service

Space

for service

44.5

252.2

7.5

8.3

Space for

service

50

Space for
service
100

102.5

585

102.5

133.5

450206.5

202450138

44.5

43.2

39.3

200

65

15

* Leave extra space on the right side to enable removal of the lid screw.

-

22

-

(3) Preparation of indoor unit

(a) Mounting of connecting wires

1) Remove the lid.

2) Remove the wiring clamp.

3) Connect the connecting wire securely to the terminal block.

Use cable for interconnection wiring to avoid loosening
of the wires.
CENELEC code for cables Required field cables.

H05RNR3G1.5 (Example) or 245IEC57

H Harmonized cable type

05 300/500 volts

R Natural-and/or synth. rubber wire insulation
N Polychloroprene rubber conductors insulation
R Standed core

3 Number of conductors

G One conductor of the cables is the earth conductor

(yellow/green)

1.5 Section of copper wire (mm

2

)

• Connect the connection wire securely to the terminal
block. If the wire is not affixed completely, contact will
be poor, and it is dangerous as the terminal block may
heat up and catch fire.

• Take care not to confuse the terminal numbers for indoor
and outdoor connections.

• Affix the connection wire using the wiring clamp.

4) Fix the connecting wire by wiring clamp.

5) Attach the lid.

Pipe

Drain hose

1. Remove the drain hose. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain hose.

For power supply, indoor outdoor

For power supply, indoor outdoor

1 Brown

2 Blue

(b) Shaping the pipe

(c) Taping of the exterior

• Hold the bottom of the pipe and change its direction
before stretching it and shaping it.

• Tape only the portion that runs through the wall.
Always tape the crossover wires with the pipe.

(d) Cautions when piping from the left and the rear center of the unit

[ Top View ]

• Loosen and remove the
spring-type clamp.

• Remove with your hand or
a pair of pliers.

• Use a hexagonal wrench to
correctly insert the drain cap
which was removed in 2.
Caution: Be careful because
if the cap is not inserted
property, water leak may
occur.

• Loosen the spring-type clamp
and securely insert the drain
hose.
Caution: Be careful because if
the cap is not inserted properly,
water leak may occur.

Left Side Piping Right Side Piping

Right rear piping

Left rear piping

Left side piping Right side piping

Lid

Screw *

Clamp

Terminal block

[ Procedure for exchanging the drain hose ]

Left downward

Right

Rear

Downward

Left rear

Left

Piping is possible in the rear, left,
left rear, left downward, right or
downward direction.

Wall

Gutter

Pipes storage area

• Do not place the power supply cords above the gutter, because the
air conditioner is structured in a way where condensation on the
back side is collected in to the drain pan before drainage.

• Do not make traps in the drain hose line.

Inverted slipe

Trap

*Leave space to allow removal of this screw after installation.

Declining slope

-

23

-

(e) Securing the indoor unit to the installation board

•

How to remove the indoor unit from the installation board

1) Push up at the marked portion of the indoor unit base lower

latch, and slightly pull it toward you.

(both right and left hand sides)

(The indoor unit base lower latch can be removed from the in-

stallation board)

2) Push up the indoor unit upward. So the indoor unit will be

removed from the installation board.

(4) Removal and installation of the front panel

(a) Removing

• Remove the 2 set screws.

• Move the lower part of the panel forward and push upwards to

remove. (Remove the 3 latches in the upper section.)

(b) Fitting

• Do remove the air filter.

• Cover the body with the front panel.

• Push the circled portion at the front.

• Tighten the 2 set screws.

• Fit the air filter. Carry out in the above order.

(5) Open/close and detachment/attachment of air inlet panel

(a) To open, pull the panel at both ends of lower part and release

latches, then pull up the panel until you feel resistance. (The

air inlet panel stops at approx. 60˚ open position.)

(b) To close, hold the panel at both ends of lower part to lower

downward and push it slightly until the latch works, then push

the center portion slightly.

(c) To remove, pull up the panel to the position shown in right

illustration and pull it toward you.

(d) To install, insert the air inlet panel arm into the slot on the front

panel from the position shown in right illustration, hold the

panel at both ends of lower part, lower it downward slowly,

then push it slightly until the latch works and further push the

center portion slightly.

Set screws

Installation Steps

1 Pass the pipe through the hole

in the wall, and hook the up­per part of the indoor unit to
the installation board.

2 Gently push the lower part to

secure the unit.

The marked portion of the
Indoor unit bese lower latch

Lid

-

24

-

1 2

For power supply, indoor outdoor

For power supply, indoor outdoor

1 Brown

2 Blue

Terminal block

Interconnecting wire

• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø9.52) : 34~42N·m (3.4~4.2kgf·m)
Gas side (ø12.7) : 49~61N·m (4.9~6.1kgf·m)

• Use one more spanner to fix the valve.

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Install the removed flared nuts to the pipes to be

connected, then flare the pipes.

Dimension A
Liquid side
(ø6.35): 9.0 dia
Gas side
(ø9.52): 13.0 dia
(ø12.7): 16.2 dia

Press

Remove

Remove

(Do not
turn)

Spanner
for fixing

the piping)

Torque
wrench

• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø9.52) : 34~42N·m (3.4~4.2kgf·m)
Gas side (ø12.7) : 49~61N·m (4.9~6.1kgf·m)

• Always use a Torque wrench and back up spanner to tighten the flare nut.

Manifold
Valve

-76 cm Hg

Handle Lo
(pressure)

Charge hose

Stop valve
(Two-way valve)

Service port

Stop value
(Three-way

value)

Compound
(Gauge)

Pressure
gauge

Handle Hi
(pressure)

Charge hose

Vacuum pump

1.5.3 Installation of outdoor unit

(1) Make sure that the unit is stable in installation. Fix the unit to

stable base.

(2) Perfrom wiring, making wire terminal numbers conform to ter-

minal numbers of indoor unit terminal block.

1.5.4 Connection of refrigerant pipings

(1) Preparation

Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.

(a) Indoor unit side

(b) Outdoor unit side

(2) Connection of refrigerant piping

(a) Indoor unit side

• Connect firmly gas and liquid side
pipings by Torque wrench.

(b) Outdoor unit side

• Connect firmly gas and liquid side
pipings by Torque wrench.

(3) Air purge

(a) Tighten all flare nuts in the pipings both indoor and outside wall so as not to cause leak.

(b) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below.

(c) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation.

Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa

(– 76 cmHg).

(d) After completing vacuum operation, fully open service valve (Both gas and liquid sides) with hexagon headed wrench.

(e) Detach the charge hoses.

(f) Check for possible leakage of gas in the connection parts of both indoor and outdoor.

-

25

-

♦ Additional refrigerant charge

When refrigerant piping exceeds 7.5m conduct additional refrigerant charge after refrigerant sweeping.

7.5m over 15m:Additional charge amount per meter = 10g/m

[Example]

How much amount of additional charge for 15m piping?

(15 – 7.5)m × 10g/m=75g 75g for additional charge

(4) Insulation of connecting portion

Vinyl tape

To cover the connecting portion with insula­tion materials, cut upper portion and then seal
it with insulation materials.

Cover the exterior portion with cov­ering tape and shape the piping so it
will match the contours of the route
that the piping to take. Also fix the
wiring and pipings to the wall with
clamps.

Insulation

Refrigerant piping
Electrical wiring

Covering tape
Drain hose

Tapping screw

(a) Cover the connection portion of the refrigerant piping with the

pipe cover and seal them.

If neglecting to do so, moisture occurs on the piping and water

will drip out.

(b) Finishing and fixing

1) Tie up the piping with wrapping tape, and shape it so that it

conforms to which the pipe is attached.

2) Fix them with clamps as right figure.

1.5.5 Installation of remote control switch

(1) Mounting method of battery

• Uncover the remote control switch, and mount the bat­teries [R03(AAA, Micro)×2 pieces] in the body regu­larly.

(Fit the poles with the indication marks, , & . with­out fail)

(b) Fixing to pillar or wall

• Conventionally, operate the wireless remote control by
holding in your hand.

• Avoid installing it on a clay wall etc.

-

-

+

+

Battery

Cover

Screws

1.5.6 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.

-

26

-

1.5.7 Test run

(1) Conduct trial run after confirming that there is no gas leaks.

(2) When conducting trial run set the remote control thermostat to continuous operation position. However when the power source is

cut off or when the unit’s operation switch is turned off or was turned to fan operation position, the unit will not go into operation

in order to protect the compressor.

(3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms.

(4) Make sure that drain flows properly.

(5) Standard operation data

Note (1) The data are measured at following conditions

Ambient air temperature

Indoor side: Cooling ... 27˚C DB, 19˚C WB

Outdoor side: Cooling ... 35˚C DB, 24˚C WB

Temp. difference between
return air and supply air (°C)

(220/230V)

Model

SRK09CH SRK12CH

Item
Low pressure (MPa) 0.40~0.60 0.39~0.59

13~16 12~15

Running current (A) 4.2 5.1

(b) When manipulating the remote control mounted on a

wall:

Make sure that it works normally (i.e., transmission/reception

signal is audible) before mounting.

Notes (1) The remote control is correctly facing the

sensing element of the air conditioner when being
manipulated.

(2) The typical coverage is indicated (in the left

illustration). It may be more or less depending on
the installation.

(3) The coverage may be less or even nil. If the sensing

element is exposed to strong light, such as direct
sunlight, illumination, etc., or dust is deposited on
it or it is used behind a curtain, etc.

or less

7 m or less

Wireless remote
control

7 m or less

or less

1.5.8 Precautions for wireless remote control installation and operation

(1) Wireless remote control covers the following distances:

(a) When operating facing the air conditioner:

or less

If the distances exceed the area indicated above, be sure to check

the receiver status.

Remote control
available in this area.

Receiver

-

27

-

1.6 MAINTENANCE DATA

1.6.1 Trouble shooting

(1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models]

All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it

is necessary to understand the function controlled by a microcomputer thoroughly, so as not to mistakenly identify correct opera-

tions as mis-operations. It is also necessary to perform the following simple checks before conducting detailed checks or exchang-

ing printed circuit board.

Before exchanging Printed circuit board

Claim call from the user

Ascertain the nature of the claim.

Ascertain the operation status.

Does the trouble occur again?

Is this nonsense claim?

Operate the unit.

Does the trouble occur again?

Temporarily turn off the power source and
turn it on again in about 1 min. and turn the
unit on again.

YES

No

YES

YES

Does the trouble occur again?

Disconnect connectors and connect them
again.

Operate the unit again after confirming that the fuse
and the varistor equipped on PCB does not burn out.

Carry out checks according to detailed
check process (See later page)

Unit did not cool, etc.

¡ Is the power on?
¡ Is the thermostat setting correct?

(Not too high?)

¡ Is the unit in a timer operation?
¡ Does user understand function?

etc.

¡ Explain the function of the unit to user.

No need for PCB change

Check further the status when the trouble occured
(such as the timer of occurence, power failures, thun­der, use status of other electrical appliances, etc).
Clarify the reason for the problem and explain it thor­oughly to the user.

No need for PCB change

Microcomputer runaway due to power source
conditions is a possible cause.

No need for PCB change

The cause is defective connector contact.

YES

No

No

No

-

28

-

(2) Indication of Self Diagnosis (Indoor unit)

TIMER light is
lights
continuously.

RUN light is flashing.
(1 Time flash.)

RUN light is flashing.
(2 Time flash.)

RUN light is flashing.
(6 Time flash.)

TIMER light is flashing.
(2 Time flash.)

Connect of Defect

Abnormality of heat
exchanger sensor.

Abnormality of room
temperature sensor.

Abnormality of indoor
fan motor.

Abnormality of outdoor
unit.

Place of defect

¡ Disconnection of heat exchanger sensor.

¡ Disconnection of room temperature

sensor.

¡ Fan motor is defective.
¡ Printed circuit board is defective.

¡ Compressor is defective.
¡ Capacitor is defective.
¡ Gas is short.

RUN light is
lights
continuously.

Abnormality of sensor Disconnection of sensor and defective connection of connector

(Disconnection)

(Short circuit)

Resistance value

(kΩ)

Temperature (°C)

Is connection to connector
good?

Is sensor resistance value
normal?

Replace PCB.

Repair connector.

Replace sensor.

No

No

Ye s

Ye s

Chart for sensor temperature
resistance characteristics

(3) Troubleshooting

Abnormality of outdoor unit [Compressor malfunction of insufficient gas (refrigerant)]

Abnormality of indoor fan motor (Fan motor defective, printed circuit board defective)

No

No

Yes

Yes

Yes

Ye s

Ye s

No

No

Replace protective device.

Replace capacitor.

Is capacitor normal?

Insufficient gas.

Replace compressor.

Is protective device normal?

Does compressor operate?

Clogging of capillary tube. etc.

Is abnormality the same after
gas charging?

Is refrigerant circulation
volume normal?

No

No

Yes

Yes

The fan motor is defective.

Repair the connector.

Is voltage being applied to the
fan motor?

The indoor circuit board
is defective.

Is the connector connection
good?

-

29

-

(4) Trouble Diagnostic Procedures

Unit malfunctions or
does not stop.

Replace PCB.

Microcomputer rarely
mis-starts even during
times or power supply
or power failure, but, it
can sometimes occur
during those times. If it
occurs, check the opera­tion, when the result is
positive then proceed as
normal.

Runaway of micro-

computer

Remove receptacle.
Insert it after 3 min.
and operate.

No change.

Normal operation.

Indoor light of
indoor unit does not
illuminate.

Check receptacle voltage.

Check if PCB fuse is blown.

Check varistor

Replace PCB.

Replace fuse.

Replace varistor.

No

Outdoor fan does not
operate.

Check voltage with fan
connector.

Replace PCB.

Check capacitor.

Replace fan motor.

Replace capacitor.

Abnormal

Ye s

Normal

Unit sensor Operation

Function

Short circuit Broken connection

Cooling

Cooling

Indoor unit

Room temperature
sensor

(1)

(Th1) except for
“continuous” thermal
setting.

Cooling will not operate

¡ FM

I : continuous operation

¡ CM,FMo: stopped

Cooling will operate

¡ Heat exchanger frost preventer begins to operate
¡ Cools alternately for 10 minutes, stopping for 3

minutes.

(5) Trouble shooting chart for the room temperature sensor (Th1), heat exchanger sensor (Th2)

Continuous Cooling operation

¡ Cannot be turned ON/OFF by thermostat
¡ When FM

I is on. “AUTO” is continuously

Hi

Heat exchanger
sensor (Th

2)

Cooling will not operate.

Note (1) When the room temperature sensor (Th

1) will not operate normally. Cooling operation may be run continuously by putting the thermostat setting on “CONTINUOUS”

-

30

-

(6) How to make sure of remote control

(1)

Is remote

control

normal?

YES

Again pushing
operating switch

Operating the
unit?

NO

Does operating Unit
ON/OFF button

YES

Replace the

display

Remote control
defects

Abnormal is not
fount

It is normal

Remote control
defects

NO

NO

YES

NO

Note (1) How to check the remote control.

(a) Press the reset switch of remote control.
(b) If the almost normal if entire display of remote control is shown after 1

indication.

Operating the unit?

Control unit defects

YES

Operating the
unit by remote
control?

-

31

-

(2) Refrigerant charge

(a) Discharge refrigerant entirely from the unit and evacuate the unit.

Note: Addition of refrigerant without evacuation is unreasonable, because it will result in low charge or overcharge.

(b) Keep the gauge manifold and connect a refrigerant cylinder to the unit.

(c) Record the weight of the refrigerant cylinder on the balance. This is necessary for making sure of the charged refrigerant

amount.

(d) Purge air from the charge hose A .

Firstly loose the connecting portion of the charge hose A at the gauge manihold side and open the valve 3 for a few

seconds, and then immediately retighten it after observing that gas is blow out from the loosened portion.

(e) Open the valve 1 and 3 after discharging air from the charge hose A , then the gas refrigerant begins flowing from the

cylinder into the unit. Be sure to erect the refrigerant cylinder upright to let gas refrigerant flow into the unit.

(f) When refrigerant has been charged into the system to some extent, refrigerant flow becomes stagnant, when that happens,

start the compressor in cooling cycle until the unit is filled with gas to the specified weight.

(g) Making sure of the refrigerant amount, close the valve 3.

(h) Disconnect the charge hose from the unit. Cover the valve ports of the refrigerant piping with caps and tighten them securely.

(i) Check for gas leakage applying a gas leak detector along the piping line.

(j) Start the air conditioner and make sure of its operating condition ...... high side and low side pressures and temperature

difference between return air and supply air.

1.6.2 Servicing

(1) Evacuation

The evacuation is an procedure to purge impurities ...... noncondensable gas, air, moisture from the refrigerant equipment by using

a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant

equipment will freeze, causing what is called water clogging.

¡ Evacuation procedure

(a) Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it

should be relieved through the check joint.

(b) Connect the service hoses of the gauge manifold to the check joint of the gas & liquid piping.
(c) Connect a vacuum pump to the charge hose A. Repeat evacuation in the following sequence.

Liquid side

Gas side

Check joint

Service hose

Charge hose

Vacuum
pump

Refrigerant
cylinder

Gauge
manifold

Stop the vacuum pump.

Notes (1) Do not use the refrigerant pressure to expel air.

(2) Do not use the compressor for evacuation.
(3) Do not operate the compressor in the vacuum condition.

Start the vacuum pump

Operate the vacuum pump for more than 15 minutes after –0.1MPa
(–76 cmHg) is indicated.

Close low pressure valve 1 of gauge manifold.

-

32

-

MEMO

-

33

-

( )

2. SRK10CHV-4, 13CHV-4

WALL MOUNTED TYPE
ROOM AIR-CONDITIONER

Split system, air cooled
cooling only type

-

34

-

CONTENTS

2.1 GENERAL INFORMATION ....................................................................... 35

2.1.1 Specific features ................................................................................... 35

2.1.2 How to read the model name ............................................................... 35

2.2 SELECTION DATA .................................................................................... 36

2.2.1 Specifications ....................................................................................... 36

2.2.2 Range of usage & limitations .............................................................. 38

2.2.3 Exterior dimensions ............................................................................. 38

2.2.4 Piping system ....................................................................................... 39

2.2.5 Selection chart ...................................................................................... 40

2.3 ELECTRICAL DATA .................................................................................. 41

2.3.1 Electrical wiring ..................................................................................... 41

2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ............. 42

2.4.1 Operation control function by remote control switch ....................... 42

2.4.2 Unit ON/OFF button .............................................................................. 43

2.4.3 Power blackout auto restart function ................................................. 44

2.4.4 Custom cord switching procedure ..................................................... 44

2.4.5 Flap and louver control ........................................................................ 45

2.4.6 3D auto operation ................................................................................. 45

2.4.7 Timer operation ..................................................................................... 46

2.4.8 Installation location setting ................................................................. 47

2.4.9 Outline of cooling operation ................................................................ 48

2.4.10 Outline of dehumidifying operation .................................................... 49

2.4.11 Outline of automatic operation ........................................................... 50

2.4.12 Outline of fan operation ....................................................................... 50

2.4.13 Outline of clean operation ................................................................... 50

2.4.14 Protective control function .................................................................. 51

2.5 APPLICATION DATA ................................................................................. 52

2.5.1 Selection of location for installation .................................................... 53

2.5.2 Installation of indoor unit .................................................................... 54

2.5.3 Installation of outdoor unit .................................................................. 57

2.5.4 Connection of refrigerant pipings ....................................................... 57

2.5.5 Installation of remote control switch .................................................. 58

2.5.6 Earthing work ........................................................................................ 58

2.5.7 Test run ................................................................................................... 59

2.5.8 Precautions for wireless remote control installation and

operation ............................................................................................... 59

2.6 MAINTENANCE DATA .............................................................................. 60

2.6.1 Trouble shooting .................................................................................. 60

2.6.2 Servicing ............................................................................................... 64

-

35

-

2.1.2 How to read the model name

Example : SR K 10 C HV -4

2.1 GENERAL INFORMATION

2.1.1 Specific features

The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit

consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling equip-

ment with operation control switch and the outdoor unit is composed of condensing unit with compressor.

(1) Remote control flap & louver

The flap & louver can be automatically controlled by operating wireless remote control.

¡Flap swing : The flaps swing up and down successively.

¡Louver swing : The louvers swing left and right successively.

¡3D auto operation : Fan speed and air flow direction are automatically controlled, allowing the entire room to be efficiently

conditioned.

¡Memory flap : Once the flap & louver position is set, the unit memorizes the position and continues to operate at the

same position from the next time.

(2) Automatic operation

When the remote control switch is set on “auto(

) ”, it will either automatically decide operation mode such as cooling and

thermal dry, or operate in the operation mode before it has been turned to automatic control.

(3) Self diagnosis function

¡ We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as

follows.

For Asia

Series No.

Cooling only type

Product capacity

Wall mounted type

Split type room air-conditioner

TIMER lightRUN light

Room temperature sensor error

Indoor fan motor error

Heat exchanger sensor error

2 time flash

6 time flash

TIMER light

ON

Trouble of outdoor unit

2 time flash

RUN light

ON

1 time flash

-

36

-

2.2 SELECTION DATA

2.2.1 Specifications

Model SRK10CHV-4 (Indoor unit)

SRC10CHV-4 (Outdoor unit)

Item

Model

SRK10CHV-4 SRC10CHV-4

kW 2.64

Cooling capacity

(1)

BTU/h 9000

Power source 1 Phase, 220/230V, 50Hz

Cooling input kW 0.73

Running current (Cooling) A 3.4

Inrush current A 18

COP (In cooling) 3.62

Noise level

(4)

dB 38 45

Exterior dimensions

mm 268 × 790 × 224 540 × 780 × 290

Height × Width × Depth

Color Fine snow Stucco white

Net weight kg 8.5 30
Refrigerant equipment

–

RSA201A018

Compressor types & Q’ty

Motor kW – 0.69

Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

kg R22 0.75 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R 0.35 (SUNISO 4GSI or ATMOS NM56)

Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 14

Air flow (at High) CMM 10.0 26.5

Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––
Operation control

Wireless-Remote control –

Operation switch

Room temperature control Microcomputer thermostat –

Pilot lamp RUN (Green), TIMER (Yellow),

–

HI POWER (Green), 3D AUTO (Green)

Safety equipment Frost protection,

Thermostat (for compressor)

Fan motor error protection

O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø9.52 (3/8")

Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m

–

Gas line : 0.33 m

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Recommended breaker size A 20

Size × Core number 1.5 mm2 × 3 cores (Including earth cable)

Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

Connection
wiring

Refrigerant

piping

(220/230V)

Operation

data

(1)

(2) The operation data are applied to the 220 V or 230 V districts respectively.

(3) The refrigerant quantity to be charged includes the refrigerant in 7.5 m connecting piping.

(Purging is not required even in the short piping.)

If the piping length is longer, when it is 7.5 to 15 m, add 10 g refrigerant per meter.

(4) Expressed in sound pressure level.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27°C19°C35°C24°C ISO-T1, JIS C9612

-

37

-

Item

Model

SRK13CHV-4 SRC13CHV-4

kW 3.66

Cooling capacity

(1)

BTU/h 12500

Power source 1 Phase, 220/230V, 50Hz

Cooling input kW 1.095

Running current (Cooling) A 5.1

Inrush current A 29

COP (In cooling) 3.34

Noise level

(4)

dB 40 49

Exterior dimensions

mm 268 × 790 × 224 540 × 780 × 290

Height × Width × Depth

Color Fine snow Stucco white

Net weight kg 8.5 39

Refrigerant equipment

–

RSA201A017

Compressor types & Q’ty

Motor kW – 1.09

Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing M fins & inner grooved tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

kg R22 0.85 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R 0.41 (SUNISO 4GSI or ATMOS NM56)
Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 22

Air flow (at High) CMM 10.0 29.5

Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––
Operation control

Wireless-Remote control –

Operation switch

Room temperature control Microcomputer thermostat –

Pilot lamp RUN (Green), TIMER (Yellow),

–

HI POWER (Green), 3D AUTO (Green)

Safety equipment Frost protection,

Thermostat (for compressor)

Fan motor error protection

O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø12.7 (1/2")

Connecting method Flare connecting
Attached length of piping Liquid line: 0.4 m

–

Gas line : 0.33 m

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Recommended breaker size A 20

Size × Core number 1.5 mm2 × 3 cores (Including earth cable)

Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

Connection
wiring

Refrigerant

piping

Model SRK13CHV-4 (Indoor unit)

SRC13CHV-4 (Outdoor unit)

(220/230V)

Operation

data

(1)

(2) The operation data are applied to the 220 V or 230 V districts respectively.

(3) The refrigerant quantity to be charged includes the refrigerant in 7.5 m connecting piping.

(Purging is not required even in the short piping.)

If the piping length is longer, when it is 7.5 to 15 m, add 10 g refrigerant per meter.

(4) Expressed in sound pressure level.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27°C19°C35°C24°C ISO-T1, JIS C9612

-

38

-

2.2.2 Range of usage & limitations

2.2.3 Exterior dimensions

Indoor return air temperature
(Upper, lower limits)

Refrigerant line (one way) length Max. 15m

All models

Refer to the selection chart

Power source voltage Rating ± 10%

Voltage at starting Min. 85% of rating

Frequency of ON-OFF cycle Max. 10 times/h

ON and OFF interval Max. 3 minutes

Outdoor air temperature
(Upper, lower limits)

Vertical height difference between
outdoor unit and indoor unit

Max. 5m (Outdoor unit is higher)
Max. 5m (Outdoor unit is lower)

Item

Models

(1) Indoor unit

Models SRK10CHV-4, 13CHV-4

Unit: mm

Piping hole (ø65)

( )

Piping hole (ø65)

53.5

380.6

Piping for Liquid 448.6 (ø6.35)

10 :ø9.52
13 :ø12.7

Piping for Gas

Drain hose 520 (ø16)

53.5

44.5

252.2

7.5

8.3

102.5

585

102.5

133.5450206.5

202450138

44.5

43.2

39.3

200

45

45

60

17.5

60

27

788

45

2.1

960

124

224 

3

Terminal block

Piping hole right(left)

268

790

A

VIEW A

→

-

39

-

(2) Outdoor unit

Models SRC10CHV-4, 13CHV-4

2.2.4 Piping system

Models All models

Outdoor unitIndoor unit

Room temp.
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Piping
(Liquid)
ø6.35

Check joint

Service valve (Liquid)

Flare connecting

Cooling cycle

Heat
exchanger

Compressor

Capillary tube

Accumulator

Service valve
(Gas)

Capillary tube

( )

Piping

(Gas)
10 : ø9.52
13 : ø12.7

Unit: mm

Terminal block

10: ø9.52 (3/8")
13: ø12.7 (1/2")

ø6.35 (1/4")

Flare connecting

Service valve (Gas)

Service valve (Liquid)
Flare connecting

Drain holes

2-16×12

138.4

40°

61.9

18.9165.1510104.9

439.1

111.4

99.4

349.5

313.1

43.1

290

12

50

350

23.5312.514

33.5

40°

42.595.9

14

540

780

-

40

-

2.2.5 Selection chart

Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way.

Net capacity = Capacity shown on specification ✕ Correction factors as follows.

(1) Coefficient of cooling capacity in relation to temperatures

(2) Correction of cooling capacity in relation to one way length of refrigerant piping

It is necessary to correct the cooling capacity in relation to the one way piping length between the indoor and outdoor units.

14 16 18 20 22

15

20

25

30

35

40

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

43

24

ISO-T1 Standard ConditionIndoor air W.B. temperature °C W.B.

Cooling

Applicable range

Coefficient of cooling

capacity in relation

to temperature

Cooling operation

Outdoor air D.B.

temperature

°C D.B.

Piping length [m]

Cooling

7

1.0

10

0.99

15

0.975

How to obtain the cooling capacity

Example : The net cooling capacity of the model SRK13CHV-4 with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C

and outdoor dry-bulb temperature 35˚C is Net cooling capacity =

SRK13CHV-4

(12187 BTU/h)

Length 15m

Factor by air
temperatures

(12500 BTU/h)

3360W

0.975

1.0

3569 W✕✕

=

-

41

-

51C

BK

BK

BL

Y/G

T

BK

BK

WH

WH

BR

OR

WH

WH

RD

WH

BK

2

3

1

Sh

CFo

Cc

OR

Outdoor unit

Indoor unit

1

2

BK Black

BL Blue

BR Brown

LB Light blue

YE Yellow

RD Red

OR Orange

WH White

Y/G Yellow/Green

Color symbol

Symbol Parts name Symbol Parts name

C

C

Capacitor for CM

FM Flap motor

CF

I

Capacitor for FM

I

,Th

12

Sensor

CF

O

Capacitor for FM

O

T Terminal block

Louver motor (RIGHT)

CM Compressor motor

ZNR Varistor

F Fuse

51C Motor protector for CM

FM

I

Fan motor (Indoor unit)

52C Magnetic contactor for CM

FM

O

LM

R

Louver motor (LEFT)

LM

L

Fan motor (Outdoor unit)

Meaning of marks

Notes (1) : denotes magnetized relay

×

: denotes demagnetized relay

(2) Th

1

is room temperature sensor. Th2 (the heat exchanger sensor) is frost prevention sensor.

Operation

Cooling

Relay symbol Control part

52C CM

Table of relay operations

M

1〜

M

3〜

U

M

FM

Power source
220/230V 50Hz

YG

LB

BR

Printed circuit board

T

WH
BK

Th1

Th2

Wireless
R-Amp

Display

CNE

CNG

YE
WH
RD

M

CNW

IC15

ZNR

1
5
3

CNU

52C-3 52C-4

52C

F

250V 3.15A

CONTROL BOX

1

2

Back up Sw

CNM

N

t°

t°

1〜

FMI

M

CNX

M

CNY

FMo CM

CF

I

LM

R

LM

L

2.3 ELECTRICAL DATA

2.3.1 Electrical wiring

Models SRK10CHV-4, 13CHV-4

-

42

-

2.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

2.4.1 Operation control function by remote control switch

Remote control

Models SRK10CHV-4, 13CHV-4

◆ Operation selection

FAN SPEED button

Each time the button is pushed, the
indicator is switched over in turn.

•

The above illustration shows all controls, but in practice
only the relevant parts are shown.

OPERATION MODE select button

Each time the button pushed, the
indicator is switched over in turn.

ON/OFF (luminous) button

Press for starting operation, press again
for stopping.

HI POWER/ECONO button

This button changes the HIGH POWER/
ECONOMY mode.

AIR FLOW (UP/DOWN) button

This button changes the air flow (up/down) mode.

This button changes the air flow (left/right) mode.

SLEEP button

This button selects SLEEP operation.

CLEAN switch

This switch changes the CLEAN mode.

ON TIMER button

This button selects ON TIMER operation.

AIR FLOW (LEFT/RIGHT) button

3D AUTO button

This button sets 3D AUTO operation.

This button cancels the ON timer, OFF
timer, and SLEEP operation.

CANCEL button

RESET switch

Switch for resetting microcomputer and
setting time.

SLEEP indicator

Indicates during SLEEP operation.

TEMPERATURE indicator

Indicates set temperature.
(Does not indicate temperature when operation
mode is on AUTO)

FAN SPEED indicator

Indicates set air flow rate with lamp.

CLEAN indicator

Indicates during CLEAN operation.

ON/OFF TIMER indicator

Indicates during ON/OFF TIMER operation.

AIR FLOW indicator

Shows selected flap and louver mode.

3D AUTO indicator

Indicates during 3D AUTO operation.

HI POWER/ECONO MODE indicator

Indicates during HIGH POWER/ECONOMY
mode operation.

[

OPERATION MODE indicator

Indicates selected operation with lamp.

(Auto)•(Cool)• (Fan) •(Dry)]

OFF TIMER button

This button selects OFF TIMER operation.

TEMPERATURE button

This button sets the room temperature.
(This button changes the present time and
TIMER time.)

TIME indicator

Indicates present time or timer setting time.

◆ Indication selection

-

43

-

Unit indication selection

Models SRK10CHV-4, 13CHV-4

3D AUTO light (green)

Illuminates during 3D AUTO operation.

RUN light (green)

Illuminates during operation
and CLEAN operation.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HIGH POWER operation.

Unit ON/OFF button

2.4.2 Unit ON/OFF button

When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the

unit on and off.

(1) Operation

Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off.

(2) Details of operation

The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor),

whether to go into the cooling or thermal dry modes.

Function

Room temperature

Operation mode

setting

Fan speed Flap

Timer switch

Cooling About 23ºC

Thermal dry About 24ºC

Auto Auto

Continuous

-

44

-

2.4.3 Power blackout auto restart function

(1) Power blackout auto restart function is a function that records the operational status of the air-conditioner immediately prior to it

being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored.

(2) The following settings will be cancelled:

(a) Timer settings

(b) High-power operations

Notes (1) The power blackout auto restart function is set at on when the air-conditioner is shipped from the

factory. Consult with your dealer if this function needs to be switched off.

(2) When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer.

(3)

If the jumper wire (J7) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right)

Jumper wire (J7)

2.4.4 Custom cord switching procedure

If two wireless remote controls are installed in one room, in order to prevent wrong operation

due to mixed signals, please modify the printed circuit board in the indoor unit’s control box

and the remote control using the following procedure. Be sure to modify both boards. If only

one board is modified, receiving (and operation) cannot be done.

(1) Modifying the indoor unit’s printed circuit board

Take out the printed circuit board from the control box and cut off jumper wire (J6)

using wire cutters.

After cutting of the jumper wire, take measures to prevent contact with the other the lead

wires, etc.

(2) Modifying the wireless remote control

(a) Remove the battery.

(b) Cut the jumper wire shown in the figure at right.

Jumper wire (J6)

Cut

-

45

-

2.4.5 Flap and louver control

Control the flap and louver by AIRFLOW




(UP/DOWN) and



(LEFT/RIGHT) button on the wireless remote control.

(1) Swing flap

Flap moves in upward and downward directions continuously.

(2) Swing louver

Louver moves in left and right directions continuously.

(3) When not operating

The flap returns to the position of air flow directly below, when operation has stopped.

(4) Memory flap (Flap or Louver stopped)

When you press the AIRFLOW (UP/DOWN or LEFT/RIGHT) button once while the flap or louver is operating, it stops swinging

at an angle. Since this angle is memorized in the microcomputer, the flap or louver will automatically be set at this angle when the

next operation is started.

¡ Recommendable stopping angle of the flap

Horizontal
blowing

COOL•DRY

Operation step

Flap

Louver

Conditions for
jumping to next STEP

Fan speed Setting fan speed

_

20 cycle 60 cycle 60 cycle

Auto : HIGH POWER
Other than Auto: Setting fan speed

Setting fan speed

STEP1 STEP2 STEP3 STEP4

Left louver

The left louver and right louver
operate in the same direction
left and right.

The left louver and right louver
operate in opposite directions to
each other on the left and right sides.

The left louver and right louver operate in opposite directions to
each other on the left and right sides.

Right louver

Left louver Right louver

Left louver Right louver

2.4.6 3D auto operation

Control the flap and louver by 3D AUTO button on the wireless remote control.

Fan speed and air flow direction are automatically controlled, allowing the entire room to efficiently conditioned.

(1) Detail of operation

(a) Perform STEP1 → STEP2 → STEP3 → STEP4 one time.

(b) After performing STEP4 in (a) above, the next steps to be carried out are determined by the difference between the room

temperature and the setting temperature.

1) Room temperature – Setting temperature > 5ºC: STEP2 → STEP3 → STEP4 are performed.

2) Room temperature – Setting temperature

<
=

5ºC: STEP3 → STEP4 are performed.

-

46

-

¡ If the difference (= Room temperature – Setting tempera-

ture) is 4°C, the correction value is found to be +5 min­utes from the table shown above so that the starting time
of next operation is determined as follows:

15 min. earlier + 5 min. = 20 min. earlier

↑↑

Current operation

Correction value

start time

Corrects the starting time of next operation by
calculating the temperature difference.

(Example) Cooling

Room temperature

Setting temperature

Operation starting time

Time

Setting time

15 min. 10 min. 5 min.
earlier earlier earlier

Start

Timer operation
(time)

Temperature
setting (˚C)

Cooling

(2) Sleep timer operation

Pressing the SLEEP button causes the temperature to be controlled as shown in the following chart with respect to the set tempera-

ture.

+

1.0

0

-1.0

0 1.0 2.0

2.4.7 Timer operation

(1) Comfortable timer setting (ON timer)

If the timer is set at ON when the operation select switch is set at the cooling, or the cooling in auto mode operation is selected, the

comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the

relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.

(Max. 60 minutes)

Operation mode Operation start time correction value (Min.)

3 < Room temp. – Setting temp. 1 < Room temp. – Setting temp.

<
=

3 Room temp. – Setting temp.

<

=

1

At cooling

+5 No change –5

Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th1).

(2) This function does not actuate when the operation select switch is set at the dehumidifying as well as the dehumidifying in the auto mode.

However, the operation of item (1) above is performed during the dehumidifying in the auto mode.

(3) During the comfortable timer operation, both the run light and timer light illuminate and the timer light goes off after expiration of the timer, ON setting time.

(3) OFF timer operation

The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period.

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47

-

2.4.8 Installation location setting

When the indoor unit is installed at the end of a room, control the air flow direction so that it is not toward the side walls. If you set the

remote control’s installation position, keep it so that the air flow is within the range shown in the following figure.

(1) Setting

1 If the air conditioning unit is running, press the ON/OFF button to stop.

The installation location setting cannot be made while the unit is running.

2 Press the AIR FLOW




(UP/DOWN) button and the

AIRFLOW



(LEFT/RIGHT) button together for 5 seconds

or more.

The installation location display illuminates.

3 Setting the air-conditioning installation location.

Press the AIR FLOW



(LEFT/RIGHT) button and adjust to the desired

location.

Each time the AIR FLOW



(LEFT/RIGHT) button is pressed, the

indicator is switched in the order of:

4 Press the ON/OFF button.

The air-conditioner's installation location is set.

Press within 60 seconds of setting the installation location (while the

installation location setting display illuminates).

Airflow range Airflow range Airflow range

(Left End Installation) (Center Installation) (Right End Installation)

1, 4

2
3

(Center Installation) (Right End Installation) (Left End Installation)

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48

-

2.4.9 Outline of cooling operation

(1) Operation of major fanctional components

(2) Fan speed switching

(a) Auto fan control

The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the

room temperature sensor) and the thermostat setting as shown below.

(3) Thermostat operation

The compressor and outdoor fan and turned on and off as shown below according to the temperature setting.

(4) HIGH POWER operation ( “HI POWER” button on the remote control : ON)

The following operation is performed for 15 minutes without relation to the set temperature or fan speed setting.

(5) ECONOMY operation ( “ECONO” button on the remote control : ON)

The set temperature changes as shown at right, and the

indoor unit fan speed is set on speed 2.

Notes (1) Room temperature is not adjusted during the HIGH POWER operation.

(2) Protective functions will actuate with priority even during the HIGH POWER

operation.

Indoor fan motor

Flap and louver

Display

52C

Outdoor fan motor

ON

ON or OFF

Lights up

OFF

OFF

ON

ON or OFF

Lights up

ON

ON

OFF

Stop position control

Lights up or flashes

OFF

OFF

When the compressor

command is OFF

When the compressor

command is ON

When the compressor goes

OFF due to an anomalous stop.

Functional
components

Item

Swing flap or louver

Swing stop

Auto fan control

Speed 5

Speed 5

Speed 3

Speed 3

AUTO HIGH MED

Speed 2

Speed 2

LOW

Flow control

Fan speed switching

Speed 4

Speed 3

Speed 2

Thermostat setting point

Speed 5

+1 +2 +3 +4

OFF

ON

Set temp.

-1

Room temp.

Compressor
Outdoor fan

Indoor unit fan

Outdoor unit fan

Compressor

Speed 6 fixed

ON

ON

Running time

Running start ~ 1 hour

1~2 hours

2 hours ~

Set temperature compensation

Set temperature +0.5

Set temperature +1.0

Set temperature +1.5

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49

-

Note (1) Thermostat operation is performed in A, B Block. When compressor and indoor fan stop by thermostat operation within 12 minutes from start, temperature

check is performed by operating indoor fan at speed 1 for 20 seconds before finishing 12 minutes and allowing decision of next operation block.

(3) DRY operation

After finishing start up operation described in (2) above, thermal dry operation is performed at 8 minutes intervals, according to the

difference between room temperature and thermostat setting temperature as shown below.

Beside, 1 cycle of this operating time consists of 8 minutes, 7 cycle operation is performed then.

2.4.10 Outline of dehumidifying operation

(1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as

shown below.

¡ Operation block area

(2) Start up operation

ON

OFF

OFF

0

3

6

912

ON

OFF

OFF

0

12

Compressor
and
outdoor fan

Speed 2

Indoor fan

Start Temperature check

Start

Temperature check

Compressor
and
outdoor fan

Indoor fan

Operation block decision

C.D Block

A.B Block

minutes

minutes

Speed 2

Speed 1

20
seconds

ON

OFF

OFF

0

4

8

ON

OFF

OFF

0

8

Compressor
and
outdoor fan

Indoor fan

D Block

Compressor
and
outdoor fan

Indoor fan

C Block

Compressor
and
outdoor fan

Indoor fan

B Block

Compressor
and
outdoor fan

Indoor fan

A Block

20 seconds

20 seconds

minutes

minutes

Start Temperature check Start Temperature check

Operation block decision

20 seconds

minutes

minutes

Start Temperature check Temperature check

Operation block decision

Start

Speed 1

Speed 1

OFF

OFF

0

8

ON

OFF

OFF

0

3

8

Speed 1

Speed 2

Running time

Running start ~ 1 hour

1~2 hours

2 hours ~

Set temperature compensation

Set temperature +0.5

Set temperature +1.0

Set temperature +1.5

(4) ECONOMY operation ( “ECONO” button on the remote control : ON)

The set temperature changes as shown at right, and the

indoor unit fan speed is set on speed 2.

D Block C Block B Block A Block

–2 0 +3

Room temp. – Setting temp.(deg)

Speed 2

Speed 2

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50

-

2.4.11 Outline of automatic operation

(1) Determination of operation mode

The blow operation of the indoor fan is carried out at the 1st speed for 20 seconds and the room temperature is checked to

determine the operation mode automatically. (When the unit is operated by the turn-on timer, the blow operation is not carried out.)

2.4.12 Outline of fan operation

(1) Operation of major fanctional components

(2) HIGH POWER operation (“HI POWER” button on the remote control : ON)

The following operation is performed for 15 minutes without relation to the set fan speed.

52C

Indoor fan motor

Outdoor fan motor

Flap and louver

Speed 6 Speed 5 Speed 4

OFF

OFF

ON or OFF

Speed 3 Speed 2 Speed 1

HIGH

POWER

AUTO HIGH MED LOW ECONOMY

Functional
components

Fan speed switching

Indoor unit fan

Outdoor unit fan

Compressor

Speed 6 fixed

OFF

OFF

Note (1) Protective functions will actuate with priority even during the HIGH POWER operation.

Room temperature<26°C26°C

<
=

Room temperature

Operation mode Dry Cooling

(2) Within 30 minutes after either auto or manual operation stops, if auto operation is started, or if you switch to auto operation during

manual operation, the system runs in the previous operation mode.

(3) The temperature is checked 1 time in 30 minutes after the start of operation, and if the judgment differs from the previous operation

mode, the operation mode changes.

(4) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of the

wireless remote control and the setting temperature.

Signals of wireless remote control (Display)

–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6

Setting Cooling 17 18 19 20 21 22 23 24 25 26 27 28 29

temperature Dehumidifying 18 19 20 21 22 23 24 25 26 27 28 29 30

2.4.13 Outline of clean operation

COOL,DRY,AUTO (COOL,DRY); after operation has stopped, the moisture inside the dryer air conditioner, controls the production of

fungus etc.

(1) Operating condition

‘Clean’ is switched ON, when the air conditioner receives a STOP signal.

(2) Detail of operation

(3) Reset condition

When control finishes 120 minutes after the Clean operation starts. When the stop signal is received from the remote control.

Compressor OFF

Indoor fan motor Speed 1

Outdoor fan motor OFF

Flap and louver Fully closed

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51

-

2.4.14 Protective control function

(1) Frost prevention for indoor heat exchanger [Preventing frost accumulation on the indoor heat exchanger]

During the Cooling or Dry operation in low room air temp. condition, evaporating temperature will decrease and consequently

indoor heat exchanger sometimes gets clogged with frost (or ice).

In order to prevent this trouble, compressor is stopped by under mentioned condition by indoor heat exchanger sensor (Th

2) and

timer (built into microcomputer circuit) functions.

Also indoor fan is changed over to protects the fan tap just before frost prevention control.

CM, FM

O stoppage condition

1 Temperature of heat exchanger is

2.5˚C or lower.

2 As least 3 minutes has passed since

the compressor started.

Indoor heat exchanger
temperature (˚C)

CM, FMO re-starting condition

1 Temperature of heat exchanger is

8˚C or higher.

Set fan
speed

Protects
the fan
tap just
before
frost
prevention
control

(2) Three-minute forced operation

When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the

operation mode. (After 3 minutes has passed the thermal operation is effective.)

However, stopping the compressor via a stop signal or protection control has priority.

(3) Self diagnosis function

When something abnormal happens on the outdoor unit, indoor unit fan motor and each sensor (heat exchanger, room temperature),

it will be indicated by flashing lights.

(a) Abnormality of outdoor unit: When the indoor heat exchanger temperature does not fall to 25°C or below for 40 minutes

after 5 minutes have elapsed since the compressor operation start, the abnormality stop

occurs. (The timer light flashes 2 times.)

(b) Abnormality of indoor fan motor: The indoor fan motor revolves at a rate under 300 rpm for 30 seconds or longer, the

RUN light will flash.

(c) Abnormality of heat exchanger sensor: RUN light will flashing when the input temperature of the heat exchanger

sensor measures less than –20°C for more than 15 seconds with the air

conditioner “OFF”. (will not flashing during operation)

(d) Abnormality room temperature sensor: RUN light will flashing when the input temperature of the room temperature

sensor measures less than –20°C for more than 15 seconds with the air

conditioner “OFF”. (will not flashing during operation)

Note (1) If the above abnormalities happen concurrently, the light will flashing in the order of item number (a) through (d) above.

2.5 8

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52

-

2.5 APPLICATION DATA
SAFETY PRECAUTIONS

¡ Please read these “Safety Precautions” first then accurately execute the installation work.
¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points

which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the

WARNING section. However, there is also a possibility of serious consequences in relationship to the points listed in the
CAUTION section as well. In either case, important safety related information is indicated, so by all means, properly observe all

that is mentioned.

¡ After completing the installation, along with confirming that no abnormalities were seen from the operation tests, please explain

operating methods as well as maintenance methods to the user (customer) of this equipment, based on the owner’s manual.

Moreover, ask the customer to keep this sheet together with the owner’s manual.

WARNING

¡ To disconnect the appliance from the mains supply this appliance must be connected to the mains by means of

a circuit breaker or a switch (use a recognized 20A) with a contact separation of at least 3mm.

¡ The appliance shall be installed in accordance with national wiring regulations.
¡ This system should be applied to places as households, residences and the like. Application to inferior environ-

ment such as engineering shop could cause equipment malfunction.

¡ Please entrust installation to either the company which sold you the equipment or to a professional contractor.

Defects from improper installations can be the cause of water leakage, electric shocks and fires.

¡ Execute the installation accurately, based on following the installation manual. Again, improper installations can

result in water leakage, electric shocks and fires.

¡ For installation, confirm that the installation site can sufficiently support heavy weight. When strength is insuffi-

cient, injury can result from a falling of the unit.

¡ For electrical work, please see that a licensed electrician executes the work while following the safety standards

related to electrical equipment, and local regulations as well as the installation instructions, and that only exclu­sive use circuits are used.
Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks
and fires.

¡ Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted

to the terminal connection part, through properly securing it improper connection or securing can result in heat
generation or fire.

¡ Take care that wiring does not rise upward, and accurately install the lid/service panel.It’s improper installation

can also result heat generation or fire.

¡ When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the

designated refrigerant (R22) within the refrigeration cycle.
Rupture and injury caused by abnormal high pressure can result from such mixing.

¡ Always use accessory parts and authorized parts for installation construction. Using parts not authorized by this

company can result in water leakage, electric shock, fire and refrigerant leakage.

¡ Ventilate the work area when refrigerant leaks during the operation.

Coming in contact with fire, refrigerant could generate toxic gas.

¡ Confirm after the foundation construction work that refrigerant does not leak.

If coming in contact with fire of a fan heater, a stove or movable cooking stove, etc., refrigerant leaking in the
room could generate toxic gas.

CAUTION

¡ Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a telephone

ground wire.
Improper placement of ground wires can result in electric shock.

¡ The installation of an earth leakage breaker is necessary depending on the established location of the unit.

No installing an earth leakage breaker may result in electric shock.

¡ Do not install the unit where there is a concern about leakage of combustible gas.

The rare even of leaked gas collecting around the unit could result in an outbreak of fire.

¡ For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it

to prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items.

¡ Install the outdoor unit so that the aluminum fins on the air heat exchanger cannot be touched. Failure to

observe this may result in injury.

¡ Do not place objects near the outdoor unit or allow leaves to gather around the unit. If there are objects or leaves

around the outdoor unit, small animals may enter unit and contact electrical parts resulting in break down,
emission of smoke or flame.

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53

-

2.5.1 Selection of location for installation

(1) Indoor unit

(a) Where there is no obstructions to the air flow and where the cooled

air can be evenly distributed.

(b) A solid place where the unit or the wall will not vibrate.

(c) A place where there will be enough space for servicing. (Where

space mentioned right can be secured)

(d) Where wiring and the piping work will be easy to conduct.

(e) The place where receiving part is not exposed to the direct rays of

the sun or the strong rays of the street lighting.

(f) A place where it can be easily drained.

(g) A place separated at least 1m away from the television or the radio.

(To prevent interference to images and sounds.)

(2) Outdoor unit

(a) A place where good air circulation can be obtained and where rain, snow or sunshine will not directly strike the unit.

(b) A place where discharged hot air or unit’s operating sound will not be a nuisance to the neighborhood.

(c) A place where servicing space can be secured.

(d) A place where vibration will not be enlarged.

* Avoid installing in the following places.

•A place near the bedroom and the like, so that the operation noise will cause no trouble.

•A place where there is possibility of flammable gas leakage.

•A place exposed to strong wind.

(e) Do not install the unit near the seaside, or where there is possibility of chlorine gas generation.

Model

All models

Item
One way piping length (R) 15 m

Outdoor
unit is lower

5 m

Outdoor unit
is higher

5 m

Notes (1) Blowing out port and suction port on the back side of the unit can be

installed at a distance of 10cm from walls.

In case the barrier is 1.2m or above in height, or is overhead, the

sufficient space between the unit and wall shall be secured.

(2) When the unit is installed, the space of the following dimension and

above shall be secured.

(3) Limitations for one way piping length and vertical

height difference.

(

)

Vertical height
difference (h)

6.5 cm

5 cm

10 cm

60 cm MIN

Air intake

10 cm MIN

10 cm
MIN

Air outlet

Air
intake

No obstacles
(Service
space for
electrical
parts)

r

h

Right
side

Left
side

-

54

-

Adjustment of the installation board in the horizontal
direction is to be conducted with four screws in a
temporary tightened state.

2.5.2 Installation of indoor unit

(1) Installation of installation board

(a) Fixing of installation board

(2) Drilling of holes and fixture sleeve (Option Parts)

When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use pipe hole sleeve sold separately.

(a) Drill a hole with ø65

whole core drill

(b) Adjusting sleeve length

Adjust so that board will be level by turning the board
with the standard hole as the center.

Standard hole

(c) Install the sleeve

(Inserting sleeve) (*Sleeve + *Inclined + *Sealing plate)

Note (1) Drill a hole with incline of 5 degree from

indoor side to outdoor side.

Indoor side Outdoor side

Cut off the sleeve
collar in case of
drawing piping out
to rear.

Cut off the sleeve
collar that can be
seen from beneath
the unit.

Wall thickness

+ 1.5 cm

Indoor side Outdoor side

Turn to
tighten

Paste

View of sleeve when installed

Inclined
flange

Sealing
plate

Sleeve

Indoor side Outdoor side

Look for the inside wall structures (Intersediate support or
pillar and firaly install the unit after level surface has been
checked.)

Mating mark for level surface

450

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit : mm

Piping hole( 65) Piping hole( 65)

Installation board

Indoor unit

53.5

Piping for Gas 380.6

Piping for Liquid 448.6

Drain hose 520( 16)

53.5

Space *

for service

Space

for service

44.5

252.2

7.5

8.3

Space for

service

50

Space for
service
100

102.5

585

102.5

133.5

450206.5

202450138

44.5

43.2

39.3

200

65

15

* Leave extra space on the right side to enable removal of the lid screw.

-

55

-

(3) Preparation of indoor unit

(a) Mounting of connecting wires

1) Remove the lid.

2) Remove the wiring clamp.

3) Connect the connecting wire securely to the terminal block.

Use cable for interconnection wiring to avoid loosening
of the wires.
CENELEC code for cables Required field cables.

H05RNR3G1.5 (Example) or 245IEC57

H Harmonized cable type

05 300/500 volts

R Natural-and/or synth. rubber wire insulation
N Polychloroprene rubber conductors insulation
R Standed core

3 Number of conductors

G One conductor of the cables is the earth conductor

(yellow/green)

1.5 Section of copper wire (mm

2

)

• Connect the connection wire securely to the terminal

block. If the wire is not affixed completely, contact will
be poor, and it is dangerous as the terminal block may
heat up and catch fire.

• Take care not to confuse the terminal numbers for indoor

and outdoor connections.

• Affix the connection wire using the wiring clamp.

4) Fix the connecting wire by wiring clamp.

5) Attach the lid.

Pipe

Drain hose

1. Remove the drain hose. 2. Remove the drain cap. 3. Insert the drain cap. 4. Connect the drain hose.

(b) Shaping the pipe

(c) Taping of the exterior

• Hold the bottom of the pipe and change its direction

before stretching it and shaping it.

• Tape only the portion that runs through the wall.

Always tape the crossover wires with the pipe.

(d) Cautions when piping from the left and the rear center of the unit

[ Top View ]

• Loosen and remove the

spring-type clamp.

• Remove with your hand or

a pair of pliers.

• Use a hexagonal wrench to

correctly insert the drain cap
which was removed in 2.
Caution: Be careful because
if the cap is not inserted
property, water leak may
occur.

• Loosen the spring-type clamp

and securely insert the drain
hose.
Caution: Be careful because if
the cap is not inserted properly,
water leak may occur.

Left Side Piping Right Side Piping

Right rear piping

Left rear piping

Left side piping Right side piping

Lid

Screw *

Clamp

Terminal block

[ Procedure for exchanging the drain hose ]

Left downward

Right

Rear

Downward

Left rear

Left

Piping is possible in the rear, left,
left rear, left downward, right or
downward direction.

Wall

Gutter

Pipes storage area

• Do not place the power supply cords above the gutter, because the

air conditioner is structured in a way where condensation on the
back side is collected in to the drain pan before drainage.

• Do not make traps in the drain hose line.

Declining slope

Inverted slipe

Trap

*Leave space to allow removal of this screw after installation.

For power supply, indoor outdoor

2 Blue

For power supply, indoor outdoor

1 Brown

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56

-

(e) Securing the indoor unit to the installation board

•

How to remove the indoor unit from the installation board

1) Push up at the marked portion of the indoor unit base lower

latch, and slightly pull it toward you.

(both right and left hand sides)

(The indoor unit base lower latch can be removed from the in-

stallation board)

2) Push up the indoor unit upward. So the indoor unit will be

removed from the installation board.

(4) Removal and installation of the front panel

(a) Removing

• Remove the 2 set screws.

• Move the lower part of the panel forward and push upwards to

remove. (Remove the 3 latches in the upper section.)

(b) Fitting

• Do remove the air filter.

• Cover the body with the front panel.

• Push the circled portion at the front.

• Tighten the 2 set screws.

• Fit the air filter. Carry out in the above order.

(5) Open/close and detachment/attachment of air inlet panel

(a) To open, pull the panel at both ends of lower part and release

latches, then pull up the panel until you feel resistance. (The

air inlet panel stops at approx. 60˚ open position.)

(b) To close, hold the panel at both ends of lower part to lower

downward and push it slightly until the latch works, then push

the center portion slightly.

(c) To remove, pull up the panel to the position shown in right

illustration and pull it toward you.

(d) To install, insert the air inlet panel arm into the slot on the front

panel from the position shown in right illustration, hold the

panel at both ends of lower part, lower it downward slowly,

then push it slightly until the latch works and further push the

center portion slightly.

Installation Steps

1 Pass the pipe through the hole

in the wall, and hook the up­per part of the indoor unit to
the installation board.

2 Gently push the lower part to

secure the unit.

Lid

The marked portion of the
indoor unit base lower latch

Set screws

-

57

-

1 Brown

2 Blue

For power supply, indoor outdoor

For power supply, indoor outdoor

1 2

Terminal block

Interconnecting wire

• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø9.52) : 34~42N·m (3.4~4.2kgf·m)
Gas side (ø12.7) : 49~61N·m (4.9~6.1kgf·m)

• Use one more spanner to fix the valve.

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Install the removed flared nuts to the pipes to be

connected, then flare the pipes.

Dimension A
Liquid side
(ø6.35): 9.0 dia
Gas side
(ø9.52): 13.0 dia
(ø12.7): 16.2 dia

Press

Remove

Remove

(Do not
turn)

Spanner
for fixing

the piping)

Torque
wrench

• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø9.52) : 34~42N·m (3.4~4.2kgf·m)
Gas side (ø12.7) : 49~61N·m (4.9~6.1kgf·m)

• Always use a Torque wrench and back up spanner to tighten the flare nut.

Manifold
Valve

-76 cm Hg

Handle Lo
(pressure)

Charge hose

Stop valve
(Two-way valve)

Service port

Stop value
(Three-way
value)

Compound
(Gauge)

Pressure
gauge

Handle Hi
(pressure)

Charge hose

Vacuum pump

2.5.3 Installation of outdoor unit

(1) Make sure that the unit is stable in installation. Fix the unit to

stable base.

(2) Perfrom wiring, making wire terminal numbers conform to ter-

minal numbers of indoor unit terminal block.

2.5.4 Connection of refrigerant pipings

(1) Preparation

Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.

(a) Indoor unit side

(b) Outdoor unit side

(2) Connection of refrigerant piping

(a) Indoor unit side

• Connect firmly gas and liquid side
pipings by Torque wrench.

(b) Outdoor unit side

• Connect firmly gas and liquid side
pipings by Torque wrench.

(3) Air purge

(a) Tighten all flare nuts in the pipings both indoor and outside wall so as not to cause leak.

(b) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below.

(c) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation.

Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa

(– 76 cmHg).

(d) After completing vacuum operation, fully open service valve (Both gas and liquid sides) with hexagon headed wrench.

(e) Detach the charge hoses.

(f) Check for possible leakage of gas in the connection parts of both indoor and outdoor.

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♦ Additional refrigerant charge

When refrigerant piping exceeds 7.5m conduct additional refrigerant charge after refrigerant sweeping.

7.5m over 15m:Additional charge amount per meter = 10g/m

[Example]

How much amount of additional charge for 15m piping?

(15 – 7.5)m × 10g/m=75g 75g for additional charge

(4) Insulation of connecting portion

Vinyl tape

To cover the connecting portion with insula­tion materials, cut upper portion and then seal
it with insulation materials.

Cover the exterior portion with cov­ering tape and shape the piping so it
will match the contours of the route
that the piping to take. Also fix the
wiring and pipings to the wall with
clamps.

Insulation

Refrigerant piping
Electrical wiring

Covering tape
Drain hose

Tapping screw

(a) Cover the connection portion of the refrigerant piping with

the pipe cover and seal them.

If neglecting to do so, moisture occurs on the piping and

water will drip out.

(b) Finishing and fixing

1) Tie up the piping with wrapping tape, and shape it so

that it conforms to which the pipe is attached.

2) Fix them with clamps as right figure.

2.5.5 Installation of remote control switch

(1) Mounting method of battery

• Uncover the remote control switch, and mount the bat­teries [R03(AAA, Micro)×2 pieces] in the body regu­larly.

(Fit the poles with the indication marks, , & . with­out fail)

(b) Fixing to pillar or wall

• Conventionally, operate the wireless remote control by
holding in your hand.

• Avoid installing it on a clay wall etc.

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+

+

Battery

Cover

Screws

2.5.6 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.

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2.5.7 Test run

(1) Conduct trial run after confirming that there is no gas leaks.

(2) When conducting trial run set the remote control thermostat to continuous operation position. However when the power source is

cut off or when the unit’s operation switch is turned off or was turned to fan operation position, the unit will not go into operation

in order to protect the compressor.

(3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms.

(4) Make sure that drain flows properly.

(5) Standard operation data

Note (1) The data are measured at following conditions

Ambient air temperature

Indoor side: Cooling ... 27˚C DB, 19˚C WB

Outdoor side: Cooling ... 35˚C DB, 24˚C WB

Temp. difference between
return air and supply air (°C)

(220/230V)

Model

Item

SRK10CHV-4 SRK13CHV-4

Low pressure (MPa) 0.43~0.63 0.38~0.58

12~15 11~14

Running current (A) 3.4 5.1

(b) When manipulating the remote control mounted on a

wall:

Make sure that it works normally (i.e., transmission/reception

signal is audible) before mounting.

Notes (1) The remote control is correctly facing the

sensing element of the air conditioner when being
manipulated.

(2) The typical coverage is indicated (in the left

illustration). It may be more or less depending on
the installation.

(3) The coverage may be less or even nil. If the sensing

element is exposed to strong light, such as direct
sunlight, illumination, etc., or dust is deposited on
it or it is used behind a curtain, etc.

or less

7 m or less

Wireless remote
control

7 m or less

or less

2.5.8 Precautions for wireless remote control installation and operation

(1) Wireless remote control covers the following distances:

(a) When operating facing the air conditioner:

or less

If the distances exceed the area indicated above, be sure to check

the receiver status.

Remote control
available in this area.

Receiver

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2.6 MAINTENANCE DATA

2.6.1 Trouble shooting

(1) Trouble shooting to be performed prior to exchanging PCB, (Printed circuit board) [Common to all models]

All the models described in this chapter are controlled by a microcomputer. When providing maintenance service to customers it

is necessary to understand the function controlled by a microcomputer thoroughly, so as not to mistakenly identify correct opera-

tions as mis-operations. It is also necessary to perform the following simple checks before conducting detailed checks or exchang-

ing printed circuit board.

Before exchanging Printed circuit board

Claim call from the user

Ascertain the nature of the claim.

Ascertain the operation status.

Does the trouble occur again?

Is this nonsense claim?

Operate the unit.

Does the trouble occur again?

Temporarily turn off the power source and
turn it on again in about 1 min. and turn the
unit on again.

YES

No

YES

YES

Does the trouble occur again?

Disconnect connectors and connect them
again.

Operate the unit again after confirming that the fuse
and the varistor equipped on PCB does not burn out.

Carry out checks according to detailed
check process (See later page)

Unit did not cool, etc.

¡ Is the power on?
¡ Is the thermostat setting correct?

(Not too high?)

¡ Is the unit in a timer operation?
¡ Does user understand function?

etc.

¡ Explain the function of the unit to user.

No need for PCB change

Check further the status when the trouble occured
(such as the timer of occurence, power failures, thun­der, use status of other electrical appliances, etc).
Clarify the reason for the problem and explain it thor­oughly to the user.

No need for PCB change

Microcomputer runaway due to power source
conditions is a possible cause.

No need for PCB change

The cause is defective connector contact.

YES

No

No

No

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(2) Indication of Self Diagnosis (Indoor unit)

TIMER light is
lights
continuously.

RUN light is flashing.
(1 Time flash.)

RUN light is flashing.
(2 Time flash.)

RUN light is flashing.
(6 Time flash.)

TIMER light is flashing.
(2 Time flash.)

Connect of Defect

Abnormality of heat
exchanger sensor.

Abnormality of room
temperature sensor.

Abnormality of indoor
fan motor.

Abnormality of outdoor
unit.

Place of defect

¡ Disconnection of heat exchanger sensor.

¡ Disconnection of room temperature

sensor.

¡ Fan motor is defective.
¡ Printed circuit board is defective.

¡ Compressor is defective.
¡ Capacitor is defective.
¡ Gas is short.

RUN light is
lights
continuously.

Abnormality of sensor Disconnection of sensor and defective connection of connector

(Disconnection)

(Short circuit)

Resistance value

(kΩ)

Temperature (°C)

Is connection to connector
good?

Is sensor resistance value
normal?

Replace PCB.

Repair connector.

Replace sensor.

No

No

Yes

Yes

Chart for sensor temperature
resistance characteristics

(3) Troubleshooting

Abnormality of outdoor unit [Compressor malfunction of insufficient gas (refrigerant)]

Abnormality of indoor fan motor (Fan motor defective, printed circuit board defective)

No

No

Ye s

Ye s

Ye s

Yes

Yes

No

No

Replace protective device.

Replace capacitor.

Is capacitor normal?

Insufficient gas.

Replace compressor.

Is protective device normal?

Does compressor operate?

Clogging of capillary tube. etc.

Is abnormality the same after
gas charging?

Is refrigerant circulation
volume normal?

No

No

Ye s

Ye s

The fan motor is defective.

Repair the connector.

Is voltage being applied to the
fan motor?

The indoor circuit board
is defective.

Is the connector connection
good?

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(4) Trouble Diagnostic Procedures

Unit malfunctions or
does not stop.

Replace PCB.

Microcomputer rarely
mis-starts even during
times or power supply
or power failure, but, it
can sometimes occur
during those times. If it
occurs, check the opera­tion, when the result is
positive then proceed as
normal.

Runaway of micro-

computer

Remove receptacle.
Insert it after 3 min.
and operate.

No change.

Normal operation.

Indoor light of
indoor unit does not
illuminate.

Check receptacle voltage.

Check if PCB fuse is blown.

Check varistor

Replace PCB.

Replace fuse.

Replace varistor.

No

Outdoor fan does not
operate.

Check voltage with fan
connector.

Replace PCB.

Check capacitor.

Replace fan motor.

Replace capacitor.

Abnormal

Yes

Normal

Unit sensor Operation

Function

Short circuit Broken connection

Cooling

Cooling

Indoor unit

Room temperature
sensor

(1)

(Th1) except for
“continuous” thermal
setting.

Cooling will not operate

¡ FM

I : continuous operation

¡ CM,FMo: stopped

Cooling will operate

¡ Heat exchanger frost preventer begins to operate
¡ Cools alternately for 10 minutes, stopping for 3

minutes.

(5) Trouble shooting chart for the room temperature sensor (Th1), heat exchanger sensor (Th2)

Continuous Cooling operation

¡ Cannot be turned ON/OFF by thermostat
¡ When FM

I is on. “AUTO” is continuously

Hi

Heat exchanger
sensor (Th

2)

Cooling will not operate.

Note (1) When the room temperature sensor (Th

1) will not operate normally. Cooling operation may be run continuously by putting the thermostat setting on “CONTINUOUS”

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(6) How to make sure of remote control

(1)

Is remote

control

normal?

YES

Again pushing
operating switch

Operating the
unit?

NO

Does operating Unit
ON/OFF button

YES

Replace the

display

Remote control
defects

Abnormal is not
fount

It is normal

Remote control
defects

NO

NO

YES

NO

Note (1) How to check the remote control.

(a) Press the reset switch of remote control.
(b) If the almost normal if entire display of remote control is shown after 1

indication.

Operating the unit?

Control unit defects

YES

Operating the
unit by remote
control?

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(2) Refrigerant charge

(a) Discharge refrigerant entirely from the unit and evacuate the unit.

Note: Addition of refrigerant without evacuation is unreasonable, because it will result in low charge or overcharge.

(b) Keep the gauge manifold and connect a refrigerant cylinder to the unit.

(c) Record the weight of the refrigerant cylinder on the balance. This is necessary for making sure of the charged refrigerant

amount.

(d) Purge air from the charge hose A .

Firstly loose the connecting portion of the charge hose A at the gauge manihold side and open the valve 3 for a few

seconds, and then immediately retighten it after observing that gas is blow out from the loosened portion.

(e) Open the valve 1 and 3 after discharging air from the charge hose A , then the gas refrigerant begins flowing from the

cylinder into the unit. Be sure to erect the refrigerant cylinder upright to let gas refrigerant flow into the unit.

(f) When refrigerant has been charged into the system to some extent, refrigerant flow becomes stagnant, when that happens,

start the compressor in cooling cycle until the unit is filled with gas to the specified weight.

(g) Making sure of the refrigerant amount, close the valve 3.

(h) Disconnect the charge hose from the unit. Cover the valve ports of the refrigerant piping with caps and tighten them securely.

(i) Check for gas leakage applying a gas leak detector along the piping line.

(j) Start the air conditioner and make sure of its operating condition ...... high side and low side pressures and temperature

difference between return air and supply air.

2.6.2 Servicing

(1) Evacuation

The evacuation is an procedure to purge impurities ...... noncondensable gas, air, moisture from the refrigerant equipment by using

a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant

equipment will freeze, causing what is called water clogging.

¡ Evacuation procedure

(a) Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it

should be relieved through the check joint.

(b) Connect the service hoses of the gauge manifold to the check joint of the gas & liquid piping.
(c) Connect a vacuum pump to the charge hose A. Repeat evacuation in the following sequence.

Liquid side

Gas side

Check joint

Service hose

Charge hose

Vacuum
pump

Refrigerant
cylinder

Gauge
manifold

Stop the vacuum pump.

Notes (1) Do not use the refrigerant pressure to expel air.

(2) Do not use the compressor for evacuation.
(3) Do not operate the compressor in the vacuum condition.

Start the vacuum pump

Operate the vacuum pump for more than 15 minutes after –0.1MPa
(–76 cmHg) is indicated.

Close low pressure valve 1 of gauge manifold.

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PARTS LIST

INDOOR UNIT

SRK09CH, SRK12CH
SRK10CHV-4, SRK13CHV-4

OUTDOOR UNIT

SRC09CH, SRC12CH
SRC10CHV-4, SRC13CHV-4

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ROOM AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

Manual No. '08·SRK-T·077