Mitsubishi Electric SRK19CIS, SRK25CIS Technical Manual

ROOM AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

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

SRK19CIS, 25CIS

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TECHNICAL MANUAL

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CONTENTS

1 GENERAL INFORMATION............................................................................... 3

1.1 Specific features ....................................................................................... 3

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

2 SELECTION DATA ........................................................................................... 4

2.1 Specifications............................................................................................ 4

2.2 Range of usage & limitations................................................................... 6

2.3 Exterior dimensions ................................................................................. 6

2.4 Piping system............................................................................................ 8

2.5 Selection chart .......................................................................................... 9

3 ELECTRICAL DATA ....................................................................................... 10

3.1 Electrical wiring ...................................................................................... 10

4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .................. 12

4.1 Operation control function by remote control ..................................... 12

4.2 Unit ON/OFF button ................................................................................ 13

4.3 Power blackout auto restart function ................................................... 13

4.4 Custom cord switching procedure........................................................ 14

4.5 Flap and louver control .......................................................................... 14

4.6 TIMER operation ..................................................................................... 15

4.7 Outline of cooling operation .................................................................. 16

4.8 Outline of dry operation ......................................................................... 17

4.9 Outline of auto operation ....................................................................... 18

4.10 Outline of fan operation ......................................................................... 18

4.11 Regulation of outdoor air flow ............................................................... 19

4.12 Stop mode ............................................................................................... 19

4.13 External control (remote display)/control of input signal ................... 20

4.14 Operation permission/prohibition control............................................ 21

4.15 Protective control function .................................................................... 21

4.16 List of indoor unit jumper selections .................................................... 24

5 APPLICATION DATA ...................................................................................... 25

5.1 Selection of location for installation ...................................................... 26

5.2 Installation of indoor unit ........................................................................ 27

5.3 Installation of outdoor unit ..................................................................... 30

5.4 Refrigerant piping .................................................................................... 30

5.5 Test run ..................................................................................................... 32

5.6

Precautions for wireless remote control installation and operation

........ 32

6 MAINTENANCE DATA ................................................................................... 33

6.1 Troubleshooting procedures for electrical equipment......................... 33

6.2 Servicing ................................................................................................... 41

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1.2 How to read the model name

Example : SR K 19 C IS

TIMER lightRUN light

Error of signal transmission

1 GENERAL INFORMATION

1.1 Specific features

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

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

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.

Multi-directional Air Flow : Activating both up/down air swing and left/right air swing at the same time results in a multi-

directional air flow.

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)Auto operation

When the remote control is set on “aut o(

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

Room temperature sensor error

Indoor fan motor error

Heat exchanger sensor error

2 time flash

6 time flash

TIMER light

ON

Outdoor heat exchanger sensor
error

Discharge pipe temp. sensor error

Outdoor temperature sensor error

2 time flash

4 time flash

RUN light
keeps flashing

1 time flash

Abnormality of outdoor unit

Over heat of compressor

2 time flash

5 time flash

RUN light

ON

6 time flash

Series No.

Cooling only type

Product capacity

Wall mounted type

Split type room air-conditioner

(up/down air scroll and
left/right air scroll)

1 time flash

·

·

·

·

·

consists of indoor unit and

equipment with operation control

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Item

Model

SRK19CIS SRC19CIS

Cooling capacity

(1)

W 5200

Power source 1 Phase, 220V, 50Hz

Cooling input kW 1.49

Running current (Cooling) A 7.4

Inrush current A 33

COP Cooling: 3.49

Cooling

Sound level Hi 45, Me 41, Lo 38 49

Noise level

Power level

dB

60 65

Exterior dimensions

Height Width Depth

mm

318 1098 248 640 850

⳯

⳯

⳯⳯⳯

⳯⳯

⳯⳯

⳯

⳯⳯

290

Color Yellowish white Stucco white

Net weight kg 15 46

Refrigerant equipment

Compressor type & Q’ty

– RH277VHST (Rotary type) 1

Motor kW – 1.3

Starting method – Line starting

Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing

Refrigerant control Capillary tubes + Electric expansion valve

Refrigerant

(3)

kg R22 1.3 (Pre-Charged up to the piping length of 7m)

Refrigerant oil

R

0.52 (DIAMOND MS56)

Deice control Microcomputer control

Air handling equipment

Fan type & Q’ty

Tangential fan 1 Propeller fan 1

Motor W 46 43

Air flow (at High) (Cooling)

CMM

20 38

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

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater – –

Operation control

Operation switch

Wir eless-Remote control –

Room temperature control Microcomputer thermostat –

Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)

Safety equipment

O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø15.88 (5/8")

Connecting method Flare connecting

Attached length of piping Liquid line: 0.70m

Gas line: 0.63m

–

–

Insulation Necessary (Both sides)

Drain hose Connectable

P

Recommended breaker size A 20

ower source supply Terminal block (Screw fixing type)

Size Core number 1.5 mm2 4 cores (Including earth cable)

Connection wiring

Connecting method Terminal block (Screw fixing type)

Accessories (included)

Mounting kit, Clean filter (Natural enzyme filter⳯1, Photocatalytic washable deodorizing filter⳯1)

Optional parts

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

2 SELECTION DATA

2.1 Specifications

Model SRK19CIS (Indoor unit)

SRC19CIS (Outdoor unit)

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612

(2) The operation data are applied to the 220V.

(3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping.

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

If the piping length is longer, when it is 7 to 25m, add 10g refrigerant per meter.

Operation data

(1) (2)

Refrigerant

piping

Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection

The piping length is 7.5m.

(220V)

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Item

Model

SRK25CIS SRC25CIS

Cooling capacity

(1)

W 7000

Power source 1 Phase, 220V, 50Hz

Cooling input kW 2.04

Running current (Cooling) A 10.2

Inrush current A 45

COP Cooling: 3.43

Noise level Cooling

Sound level

dB

Hi 46, Me 42, Lo 39 52

Power level 60 67

Exterior dimensions

Height Width Depth

mm

318 1098 248 750 880 340

Color Yellowish white Stucco white

Net weight kg 15 67

Refrigerant equipment

Compressor type & Q’ty

–

2JS386D5CA02 (Rotary type) 1

Motor kW – 1.8

Starting method – Line starting

Heat exchanger Slit fins & inner grooved tubing Straight fin & inner grooved tubing

Refrigerant control Capillary tubes + Electric expansion valve

Refrigerant

(3)

kg R22 1.75 (Pre-charged up to the piping length of 7m)

Refrigerant oil

R

0.7 (ATMOS NM56M or SUNISO 4GDID)

Deice control Microcomputer control

Air handling equipment

Fan type & Q’ty

Tangential fan 1 Propeller fan 1

Motor W 46 85

Air flow (at High) (Cooling) CMM 20.5 60

Air filter, Q’ty

Polypropylene net (washable) 2

–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater – –

Operation control

Operation switch

Wireless-Remote control –

Room temperature control Microcomputer thermostat –

Pilot lamp RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange)

Safety equipment

O.D mm (in) Liquid line: ø6.35 (1/4") Gas line: ø15.88 (5/8")

Connecting method Flare connecting

Attached length of piping Liquid line: 0.70m

Gas line : 0.63m

–

–

Insulation Necessary (Both sides)

Drain hose Connectable

Power source supply Terminal block (Screw fixing type)

Size Core number 1.5 mm2 4 cores (Including earth cable)

Connection wiring

Connecting method Terminal block (Screw fixing type)

Accessories (included)

Mounting kit, Clean filter (Natural enzyme filter⳯1, Photocatalytic washable deodorizing filter⳯1)

Optional parts

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

Model SRK25CIS (Indoor unit)

SRC25CIS (Outdoor unit)

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27ºC 19ºC 35ºC 24ºC ISO-T1, JIS C9612

(2) The operation data are applied to the 220V.

(3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping.

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

If the piping length is longer, when it is 7 to 25m, add 10g refrigerant per meter.

Operation data

(1) (2)

Refrigerant

piping

Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error
protection

The piping length is 7.5m.

(220V)

⳯

⳯⳯

⳯⳯⳯

⳯

⳯

⳯

⳯

⳯

⳯

Recommended breaker size A 20

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6

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2.2 Range of usage & limitations

2.3 Exterior dimensions

Indoor return air temperature
(Upper, lower limits)

Refrigerant line (one way) length

All models

Refer to the selection chart

Power source voltage Rating 10%

Voltage at starting Min. 85% of rating

Max. 25m

Max. 15m

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

Item

Models

(1) Indoor unit
Models SRK19CIS, 25CIS

VIEW A

A

17.360

150

4

43.5

55

64

489

Piping hole right (left)

3

248

55

4

19 51.2

55

Terminal block

1090

Unit: mm

318

77

44.5

7.7

299

106

8.5301.8

25

50

Installation board

450

50

25

Piping for Gas (ø15.88) 633.5

44.5

53.5

106

49.5

349

886

221.547

Indoor unit

1098

Piping for Liquid (ø6.35) 703.5

Drain hose 772 (ø16)

Piping hole (ø65)

Piping hole (ø65)

Ⳳ

-

7

-

Drain holes

286.4

12

50

290

49.6

43.5

850

203.1

510 136.9

476

Elogated hole
(2-12 x16)

314

12

328

Terminal block

Service valve (Liquid)
ø6.35 (1/4'')

Service valve (Gas)
ø15.88 (5/8'')

Ground
terminal

124

34.6

20˚

20˚

42.7

100.3

15

640

14

(2) Outdoor unit

Model SRC19CIS

Model SRC25CIS

Unit: mm

Terminal block

Service valve (Gas)
Flare fitting ø15.88 (5/8")

Service valve (Liquid)
Flare fitting ø6.35 (1/4")

25.1165.5

30˚

30˚

48.5103.3

750

24.1

Drain holes

2-ø15

25.8

29.8

87.9880

150580150

61

532

223

60

15

340

61 47.5

19 380 19

418

Unit: mm

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8

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2.4 Piping system

Model SRK19CIS

Model SRK25CIS

Outdoor unitIndoor unit

Room temp.
sensor

Humidity
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Piping
(Liquid)
ø

6.35

Piping
(Gas)

ø15.88

Check joint

Service valve (Liquid)

Flare connecting

Discharge pipe
temp. sensor

Muffler

Outdoor air
temp. sensor

Heat
exchanger

Heat exchanger
sensor

Compressor

Capillary tube

Strainer

accumulator

Sub

Accumulator

Service valve
(Gas)

Electronic
expansion valve

Outdoor unitIndoor unit

Room temp.
sensor

Humidity
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Piping
(Liquid)
ø

6.35

Piping

(Gas)

Check joint

Service valve (Liquid)

Flare connecting

Discharge pipe
temp. sensor

Muffler

Outdoor air
temp. sensor

Heat
exchanger

Heat exchanger
sensor

Compressor

Capillary tube

Strainer

Strainer

accumulator

Sub

Accumulator

Service valve
(Gas)

Electronic
expansion valve

ø

15.88

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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

20

0.965

25

0.95

How to obtain the cooling capacity

Example : The net cooling capacity of the model SRK25CIS 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 = 7000 0.975 1.0 = 6825 W

SRK25CIS

Length 15m

Factor by air
temperatures

⳯

⳯⳯

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10

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3 ELECTRICAL D ATA

3.1 Electrical wiring

Model SRK19CIS

DS

+~-

~

J

N L

CC

11

9

7

3

5

CNU

JEM-A

CNE

CNF

CNM

CNX

CNY

CNT

Option

XR1

XR2

XR3

XR4

XR5

CNG

SM

LM1

LM2

HA

J

RD

Y/G

G

Y/G

BK

2/N

1

WH

3

2/N

1

3

L

N

RD

Y/G

BK

R/LS/N

WH

WH

RD

BK

1

3

Y

BL

4

5

6

ZNR

ZNR

F
250V

3.15A

F
250V

3.15A

TB TB

BK

Color symbol

Meaning of marks

Symbol

CM
F
FM

I

FM

O

SM
LM

1,2

Th

1

Th

2

Th

3

Compressor motor
Fuse
Fan motor(Indoor)
Fan motor(Outdoor)
Flap motor
Louver motor
Room temp.sensor
Heat exch.sensor(Indoor unit)
Humidity sensor

Terminal block
Operation indication (DC12)
Heating indication (DC12)
ON indication for CM(DC12)
Check indication (DC12)
Distant operation

Heat exch.sensor(Outdoor unit)
Outdoor air temp.sensor
Discharge pipe temp.sensor
Varistor
Electronic expansion valve
Diode stack
Auxiliary relay
Capacitor for CM
Capacitor for FM

O

Th

4

Th

5

Th

6

ZNR
EEV
DS
52

X1~4

CC
CF

O

TB
XR1
XR2
XR3
XR4
XR5

Parts name

BL
OR

Y/G

Black
Blue
Orange

Yellow/Green

WH White

RD Red

GR

Green

Y Yellow

Parts name

Parts name

Symbol

Symbol

BK

WH

RD

WH

RD

WH

OR

Y

RD

BL

WH

BK

Y

Y

CM2

CM1

W

V

U

52X1

52X3

52X4

Heat
exchanger

Power Source
1 Phase
220V 50Hz

R-AMP

Wireless

Display

Printed circuit
board

Printed circuit

board

CNU

CNE

CNG

FM

I

CM

52X152X352X

4

EEV

FMo

CF

O

Th4

Th5

Th6

Outdoor unit

Indoor unit

Th3

Th2Th1

-

11

-

Model SRK25CIS

DS

+-

J

N L

CC

11

9

7

3

1

5

Option

XR1

XR2

XR3

XR4

XR5

CNE

CNF

CNM

CNX

CNY

CNT

CNG

SM

LM1

LM2

Heat

HA

J

RD

Y/G

G

Y/G

BK

2/N

1

WH

3

2/N

1

3

L

N

RD

Y/G

BK

R/LS/N

WH

WH

RD

BK

1

3

Y

BL

4

5

6

exchanger

ZNR

ZNR

F
250V

3.15A

F
250V

3.15A

TB TB

BK

Color symbol

Meaning of marks

Symbol

CM
F
FM

I

FM

O

SM
LM

1,2

Th

1

Th

2

Compressor motor
Fuse
Fan motor(Indoor)
Fan motor(Outdoor)
Flap motor
Louver motor
Room temp.sensor
Heat exch.sensor(Indoor unit)

Capacitor for CM
Capacitor for FM

O

Terminal block
Operation indication (DC12)
Heating indication (DC12)
ON indication for CM(DC12)
Check indication (DC12)
Distant operation

Humidity sensor
Heat exch.sensor(Outdoor unit)
Outdoor air temp.sensor
Discharge pipe temp.sensor
Varistor
Electronic expansion valve
Diode stack
Auxiliary relay

Th

3

Th

4

Th

5

Th

6

ZNR
EEV
DS
52

X1~5

CC
CF

O

TB
XR1
XR2
XR3
XR4
XR5

Parts name

BL
OR

Y/G

Black
Blue
Orange

Yellow/Green

WH White

RD Red

GR Green

Y

Yellow

Parts name

Parts name

Symbol

Symbol

BK

WH

RD

WH

RD

WH

OR

Y

RD

BL

BK

WH

BK

Y

Y

CM2

CM1

W

V

U

52X1

52X3

52X4

52X5

Power Source
1 Phase
220V 50Hz

R-AMP

Wireless

Display

board

Printed circuit

Printed circuit

board

CNU

JEM-A

CNU

CNE

CNG

FM

I

CM

EEV

FMo

CF

O

52X152X352X

4

52X

5

Th4

Th5

Th6

Outdoor unit

Indoor unit

Th3Th2

Th1

~~

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12

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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 is 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

ON TIMER button

This switch changes the CLEAN mode.

This button selects ON TIMER operation.

AIR FLOW (LEFT/RIGHT) button

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

CANCEL button

RESET switch

TIME SET UP switch

Switch for resetting microcomputer.

This switch for setting the time.

SLEEP indicator

Indication section

◆

Operation section

Models All models

Remote control

◆

Indicates during SLEEP operation.

TEMPERATURE indicator

Indicates set temperature.
(Does not indicate temperature when operation

mode is on AUTO)

Indicates set air flow rate with lamp.

Indicates during CLEAN operation.

ON/OFF TIMER indicator

Indicates during ON/OFF TIMER operation.

AIR FLOW indicator

Shows selected flap and louver 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.

FAN SPEED indicator

CLEAN indicator

4

OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

4.1 Operation control function by remote control

-

13

-

Models All models

RUN light (green)

• Illuminates during operation.

• Blinks at the ‘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.

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 auto mode. Push it once more to turn the unit off.

(2) Details of operation

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

whether to go into the cooling or dry modes.

Function

Room temperature

Operation mode

setting

Fan speed Flap

TIMER switch

Cooling About 24ºC

Dry About 24ºC

Auto Auto

Continuous

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)

Unit ON/OFF button

Jumper wire (J7)

EXTERNAL INPUT

WIRED REMOCON

OPE PERMISSION
CUSTOM

AUTO RESTART

LO TEMP

DIRT PREVENT

COOL ONLY

HI CEIL
PANEL

50/60

Unit indication section

CLEAN operation

ON

3 sec.

1 sec.

OFF

-

14

-

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 (J4) 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.

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) Multi-directional Air Flow (up/down air scroll and left/right air scroll)

Activating both up/down air swing and left/right air swing at the same time results in a multi-directional air flow.

Up/down air scroll

In COOL, DRY and FAN operation

(5) 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

Left/right air scroll

In COOL, DRY and FAN operation

Left louver Right louver

EXTERNAL INPUT

WIRED REMOCON

OPE PERMISSION
CUSTOM

AUTO RESTART

LO TEMP

DIRT PREVENT

COOL ONLY

HI CEIL
PANEL

50/60

Jumper wire (J4)

Stops at this position
for 5 seconds.

Thick line : moves quickly

Thin line : moves slowly

▲

▲

▲

▲

·

Jumper wire (J6)

Cut

-

15

-

(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 ON TIMER 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 dry as well as the dry in the auto mode.

However, the operation of item (1) above is performed during the dry 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.

If the difference (= Room temperature – Setting tempera­ture) is 4ºC, 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

(Example) Cooling

Room temperature

Setting temperature

Start

TIMER operation
(time)

Temperature
setting (˚C)

SLEEP operation

4.6 TIMER operation

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

+

1.0

0

-1.0

0 1.0 2.0

(2)

Operation starting time

Time

Cooling

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

·

Setting time

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

(3) OFF TIMER operation

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

-

16

-

4.7 Outline of cooling operation

(1) Operation of major functional 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 termostat setting as shown below.

Indoor fan motor

Flap and louver

Display

Outdoor fan motor

Electric expansion valve

ON

ON or OFF

Lights up

Depending on the stop mode

ON

ON or OFF

Lights up

ON

Depending on the EEV control

OFF

Stop position control

Lights up or flashes

Depending on the stop mode

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

Air scroll

Swing flap or louver

Swing stop

Auto fan control

Speed 8

Speed 8

Speed 8

Speed 6

Speed 6

Speed 6

AUTO HIGH MED

Speed 4

Speed 4

Speed 4

LOW

Flow control

Fan speed switching

Speed 6

Speed 4

Thermostat setting point

Speed 8

+1 +2 +3 +4

(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 4.

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.

OFF

ON

Set temp.

-1

Room temp.

Compressor
Outdoor fan

Indoor unit fan

Outdoor unit fan

Compressor

Speed 9 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

-

17

-

D block C block B block A block

4.8 Outline of dry 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 0 +3

Room temp. – Setting temp.(deg)

(2) Start up operation

Compressor
and
outdoor fan

ON

OFF

OFF

Indoor fan

Start Temperature check

Speed 4

369120

Speed 1

20
seconds

minutes

C.D block

Compressor
and
outdoor fan

ON

OFF

OFF

Indoor fan

Start Temperature check

Speed 4

120

minutes

A.B block

Operation block decision

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.

Compressor
and
outdoor fan

ON

OFF

OFF

Indoor fan

Start Temperature check

Speed 4

480

Speed 1

20
seconds

minutes

B block

Compressor
and
outdoor fan

ON

OFF

OFF

Indoor fan

Start Temperature check

Speed 4

80

minutes

A block

Compressor
and
outdoor fan

ON

OFF

OFF

Indoor fan

Start Temperature check

480

Speed 1

20
seconds

minutes

20
seconds

D block

Compressor
and
outdoor fan

ON

OFF

OFF

Indoor fan

Start Temperature check

Speed 4
Speed 1

830

minutes

C block

Operation block decision

Operation block decision

(3) Dry operation

After finishing start up operation described in (2) above, 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.

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 4 .

·

-

18

-

4.9 Outline of auto operation

(1) Determination of operation mode

The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20

seconds, determines the operation mode and the room temperature setting correction value, and then begins in the auto

operation.

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

temperature

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

4.10 Outline of fan operation

(1) Operation of major functional 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 temperature or fan speed setting.

52C

Indoor fan motor

Outdoor fan motor

Flap and louver

Speed 9 Speed 8 Speed 8

OFF

OFF

Depend on the flap and louver control

Speed 6 Speed 4 Speed 2

HIGH POWER

AUTO HIGH MED LOW ECONO

Functional
components

Fan speed switching

Indoor unit fan

Outdoor unit fan

Compressor

Speed 9 fixed

OFF

OFF

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

27.5

25.5

19.5

18

30

Room temperature (˚C)

Cooling

Dry

Outdoor temperature (˚C)

+
–

-

19

-

4.11 Regulation of outdoor air flow

The fan operates as follows according to the outdoor air temperature.

SRK19CIS

Cooling, dry

Outdoor air temp. (˚C)

32

2nd speed

1st speed

30

Functional

components

Compressor

EEV

control

Fully closed

OFF

OFF

Set location

ON

OFF

ON

ON

Outdoor unit fun

Indoor unit fun

Flap

EEV

Cooling, cooling oriented dry

Cooling, cooling oriented dry

Operation

Stop instructions All stop Stop instructions

Restart

When the complete stop command given, when

there is and abnormal stoppage command

When stoppage occurs due to thermostat operation,

switching operations and protective function operations

470 pulse

150 pulse

1 min.

1 min.

3 min.

2 min.55 sec.

2 min.55 sec.

470 pulse

4.12 Stop mode

SRK25CGS

Cooling, dry

Outdoor air temp. (˚C)

25

2nd speed

1st speed

23

3rd speed

3230

◆◆

-

20

-

CnT Input

Unit

(CASE A)

Unit

(CASE B)

OFF

OFF

*ON

ON

ON

ON

OFF

OFF

OFF

ON

ON

ON

OFF

OFF

OFF

Note (1) The ON with the * mark indicates an

ON operation using the remote control

unit switch, etc.

(b) Pulse input

When Jumper wire J1 on the PCB of indoor unit is cut at the field.

Input signal to CnT becomes valid at OFF → ON only and the motion of air conditioner [ON/OFF] is inverted.

CnT Input

Unit

(CASE A)

Unit

(CASE B)

OFF

OFF

ON

ON

OFF

ON

OFF

ON

ON

OFF

OFF

*ON

4.13 External control (remote display)/control of input signal

(1) External control (remote display) output

Following output connectors (CnT) are provided on the printed circuit board of indoor unit.

• Operation output: Power to engage DC 12V relay (provided by the customer) is outputted during operation.

• Heating output: Power to engage DC 12V relay (provided by the customer) is outputted during the heating operation.

• Compressor OPERATION output: Power to engage DC 12V relay (provided by the customer) is outputted while the com-

pressor is operating.

• MALFUNCTION output: When any error occurs, the power to engage DC 12V relay (provided by the customer) is outputted.

(2) Control of input signal

Control of input signal (switch input, timer input) connectors (CnT) are provided on the control circuit board of indoor unit.

(a) Level input

If the factory settings (Jumper wire J1 EXTERNAL INPUT on the PCB of indoor unit) are set.

1) Input signal to CnT OFF → ON Air conditioner ON

2) Input signal to CnT ON → OFF Air conditioner OFF

-

21

-

4.14 Operation permission/prohibition control

The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor control board and inputting the external signal

into the CnT.

(1) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3)

on the indoor control board.

(2) When the CnT input is set to ON (Operation permission)

(a) The air conditioner can be operated or stopped by the signal from the remote control signal.

(b) When the CnT input is changed from OFF to ON, the air conditioner operation mode is changed depending on the status of

the jumper wire (J1) on the indoor control board.

(c) When the CnT input is set to OFF (Prohibition)

(a) The air conditioner cannot be operated or stopped by the signal from the remote control signal.

(b) The air conditioner operation is stopped when the CnT input is changed from ON to OFF.

When the jumper wire (J3) is short circuited

Normal operation is enable (when shipping)

When CnT input is set to ON, the operation starts and

if the input is set to OFF, the operation stops.

For the CnT and remote control inputs, the input which

is activated later has priority and can start and stop the

operation.

When the jumper wire (J3) is released

Permission / Prohibition mode

When CnT input is set to ON, the operation mode is

changed to permission and if input is set to OFF the

operation is prohibited.

When the jumper wire (J1) is short circuited

The signal (a) above starts the air conditioner.

(Shipping status)

When the jumper wire (J1) is released

When the CnT input is set to ON, the air conditioner

starts operation. After that, the operation of the air

conditioner depends on (a) above. (Local status)

4.15 Protective control function

(1) Frost prevention for indoor heat exchanger (During cooling or dry)

(a) Operating conditions

1) Indoor heat exchanger temperature sensor (detected with Th2) is lower than 2.5ºC.

2) 3 minutes elapsed after the start of operation.

(b) Detail of frost prevention operation

Compressor OFF

Indoor fan Protects the fan tap just before frost prevention control.

Outdoor fan Depending on the stop mode

(c) Reset condition: Indoor heat exchanger temperature sensor (Th2) is higher than 15 ºC.

-

22

-

(2) Dew condensation prevention control [Cooling (including auto), cooling oriented dry operation]

(a) Operating condition: When the following conditions are met after 5 minutes or more of continuous operation after

operation starts.

• The humidity sensor value is 68% or higher

(b) Operation contents

1) Command of the electronic expansion valve.

2) When such a command is continued for 30 minutes or more, air direction

controls will be as listed below:

Humidity (%)

63 68

Reset

Prevention control

(3) Indoor fan motor protection

When the air-conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or

under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system.

TIMER light illuminates simultaneously and the RUN light flashing 6 times at each 8-second.

(4) 3 minutes 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.

(5) 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.)

(6) Compressor overheat protection

If the discharge pipe temperature (sensed by Th6) exceeds the set temperature value, the compressor stops. If the temperature is 95ººC

or lower after a 3-minute delay, it starts again, but if this function is reactivated again within 60 minutes, it results in an abnormal stop.

(RUN light : ON, TIMER light : 5 time flash)

(c) Reset condition: When the following condition is satisfied.

• The humidity sensor value is less than 63%.

UP/ DOWN air flow

Flap swing, UP/DOWN air scroll Executes the command to the left.

Situations besides the ones described above Controls the level of the UP/DOWN flap.

LEFT/ RIGHT air flow

Louver swing, LEFT/RIGHT air scroll, Executes the command to the left.

Multi-directional Air Flow

Situations besides the ones described above

Controls the front of the LEFT/RIGHT louver .

Discharge pipe temperature (˚C)

Operation possible

Abnormal stop

110

115

19 type: 95

25 type: 95

-

23

-

(7) Serial signal transmission error protection

(a) Purpose: Prevents malfunction resulting from error on the indoor outdoor signals.

(b) Detail of operation: If the compressor is operating and a serial signal cannot be received from the indoor control with

outdoor control having serial signals continuously for 1 minute and 55 seconds, the compressor is

stopped.

After the compressor has been stopped, it will be restarted after the compressor start delay if a serial

signal can be received again from the indoor control.

(RUN light: ON, TIMER light: 6 time flash)

(8) Sensor disconnection (room temperature, indoor heat exchanger, outdoor heat exchanger, outdoor tempera-

ture, discharge pipe)

(a) Room temperature sensor

If the temperature detected by the room temperature sensor is –20ºC or lower continuously for 15 seconds or longer while

operation is stopped, an error indication is displayed. (RUN light: 2 time flash, TIMER light: ON)

(b) Indoor heat exchanger temperature sensor

If the temperature detected by the indoor heat exchanger temperature sensor is –20ºC or lower continuously for 15 seconds

or longer while operation is stopped, an error indication is displayed.

(RUN light : 1 time flash, TIMER light : ON)

(c) Outdoor heat exchanger temperature sensor

If the temperature detected by the outdoor heat exchanger temperature sensor is –64ºC or lower continuously for 15 seconds

or longer while operation is stopped, an error indication is displayed.

(RUN light : keep flashing, TIMER light : 2 time flash)

(d) Outdoor air temperature sensor

If the temperature detected by the outdoor air temperature sensor is –64ºC or lower continuously for 15 seconds or longer

while operation is stopped, an error indication is displayed. (RUN light : keep flashing, TIMER light : 1 time flash)

(e) Discharge pipe temperature sensor

After the compressor has operated for 9 minutes continuously, if there is a disconnected signal for the discharge pipe tem-

perature sensor detected -64 for 15 seconds, the compressor stops. After a 3-minute delay, it restarts, but if an abnormality

is detected 4 times continuously, the air-conditioner is stopped fully and an error indication is displayed. (RUN light : keep

flashing, TIMER light : 4 time flash)

ºC

↔

-

24

-

4.16 List of indoor unit jumper selections

Jumper Indication on

Circuit Board

With Factory Jumper

Settings (short circuited)

Reference

Page

Function Name No Jumper (Open)

No.

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

J11

J12

J13

EXTERNAL INPUT

WIRED REMOCON

OPE PERMISSION

CUSTOM

BLANK

BLANK

AUTO RESTART

LO TEMP

DIRT PREVENT

COOL ONLY

HI CEIL

PANEL

50/60

External input switching

No function

Operation permission/prohibition

Custom cord switching

No function

Auto restart

No function

LEVEL INPUT

Normal operation

Normal

Enabled

PULSE INPUT

Enabled

Select

Disabled

Page 20

Page 21

Page 14

Page 13

EXTERNAL INPUT

WIRED REMOCON

OPE PERMISSION
CUSTOM

AUTO RESTART

LO TEMP

DIRT PREVENT

COOL ONLY

HI CEIL
PANEL

50/60

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

-

25

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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 environ­ment 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 insuffi­cient, 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.
Ta ke care that wiring does not rise upward, and accurately install the lid/service panel.It’s improper installation
can also result in 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.
Not 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 event 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.

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

-

26

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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)

(d)

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

space mentioned below can be secured)

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 se

(h) A place that home appliance and household goods, etc. are not below unit.

parated at least 1m away from the television or the radio.

(To prevent interference to images and sound.)

(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.

• A place where intake air temperature is over 46˚C , it is desirable to install a roof avoiding the sunlight.

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

(c)

(d)

A place where servicing space can be secured.

A place where vibration will not be enlarged.

(e) 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.

• In a salt-laden atmosphere or a place where the generation of oil mist, vapor or fume is expected..

Model

All models

Item
One way piping length (r) 25 m

Outdoor
unit is lower

15 m

Outdoor unit
is higher

15 m

Left
side

Right
side

5 cm

10 cm

1.5 cm

6.5 cm

Air inlet

Air inlet

Air
Outlet

100

100

600

No obstacles
(Service space
for electrical
parts)

Unit : mm

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)

h

r

-

27

-

Fixing on concrete wall

Use of nut anchor Use of bolt anchor

Bolt
(M6 12)

⳯

Mounting
board

Nut
(M6)

Mounting
board

Max. 10

Adjustment of the installation board in the horizontal

direction is to be conducted with four screws in a

temporary tightened state.

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

610
450

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit: mm

-

28

-

(3) Preparation of indoor unit

(a) Mounting of connecting wires

1) Open the air inlet panel.

2) Remove the lid.

3) Remove the wiring clamp.

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

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.

5) Fix the connecting wire by wiring clamp.

6) Attach the lid.

7) Close the air inlet panel.

(b) Installing the support of piping

Use cables for interconnection wiring to avoid loosening of the
wires.
CENELEC code for cables. Required field cables.
H05RNR4G1.5 (Example)

H Harmonized cable type

05 300/500 volts

R Natural-and/or synth, rubber wire insulation

N Polychloroprene rubber conductors insulation

R Standed core
4 Number of conductors

G One conductor of the cable is the earth conductor (yellow/

green)

1.5 Section of copper wire (mm

2

)

Wiring Clamp

Lid

Terminal block

[When the hose is extended to left and taken out from the rear center]

Piping

Drain hose

Tape only the portion that goes through the wall.
Always tape the crossover wiring with the piping.

Hold the bottom of the piping and fix direction before
stretching it and shaping it.

[Top View]

[Shaping the piping] [Taping of the exterior]

Left-hand-sided-piping

Piping in the left rear direction

Piping in the right rear direction

Right

Rear

Downward

Left rear

Left downward

Left

Piping in the left direction

Piping in the right direction

Right-hand-sided-piping

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

1

2

3

·

·

-

29

-

[Drain hose changing procedures]

1. Remove the drain hose.

Remove the drain hose,
making it rotate.

Since this air conditioner has been designed to collect dew drops
on the rear surface to the drain pan, do not attach the power
cord above the gutter.

Gutter

Pipe accommodation section

Drainage

Arrange the drain hose in a downward angle.

Avoid the following drain piping.

Higher than specified The drain hose

tip is in water.

Weavy The gap to the ground

is 5 cm or less.

The drain hose tip is in
the gutter.

Odor from
the gutter

Pour water to the drain pan located under the heat exchanger, and ensure that the water is discharged outdoor.

When the extended drain hose is indoor, always use a shield pipe (to be arranged by the user) and ensure it is thermally

insulated.

Shield pipe

Extended drain hose

When it is exposed indoor.Drain hose

(c) Fixing of indoor unit

How to remove the indoor unit from the installation board

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 installation board)
Push up the indoor unit upward. So the indoor unit will
be removed from the installation board.

Remove it with hand or
pliers.

Insert the drain cap which was removed at
procedure “2” securely using a hexagonal
wrench, etc.
Note: Be careful that if it is not inserted
securely, water leakage may occur.

Insert the drain hose
securely, makingit rotate.
Note: Be careful that if it is
not inserted securely, water
leakage may occur.

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

Installation Steps

1

2

Pass the pipe through the hole
in the wall, and hook the upper
part of the indoor unit to the
installation board.

Gently push the lower part to
secure the unit.

·

·

·

·

·

·

· ·

·

1

2

-

30

-

5.3 Installation of outdoor unit

(1) Installation of outdoor unit

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

(b) When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation

bolts, wire, etc.

(c)

(d)

Perform wiring, making wire terminal numbers conform to terminal numbers of indoor unit terminal block.

Connect using ground screw located near

mark.

5.4 Refrigerant piping

(1) Preparation

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

Indoor unit side

Outdoor unit side

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
( 6.35): 9.0 mm
Gas side
( 15.88): 19.4 mm

Press

Remove

Remove

(Do not

turn)

(2) Connection of refrigerant piping

Indoor unit side

Connect firmly gas and liquid side
pipings by Torque wrench.

Outdoor unit side

Connect firmly gas and liquid side
pipings by Torque wrench.

Specified torquing value:

Liquid side (ø6.35) : 14.0~18.0N·m (1.4~1.8kgf·m)
Gas side (ø15.88): 68.0~82.0N·m (6.8~8.2kgf·m)

Use one more spanner to fix the valve.

Spanner

(for fixing
the piping)

Tor que
wrench

Specified torquing value:

Liquid side (ø6.35) : 14.0~18.0N·m (1.4~1.8kgf·m)
Gas side (ø15.88): 68.0~82.0N·m (6.8~8.2kgf·m)

Always use a Torque wrench and back up spanner to tighten

the flare nut.

Press

Power supply code
CENELEC code for cables requiring field cables
H05RNR3G2.5

▪

▪

▪

▪

▪

▪

▪

▪

▪

φ

φ

-

31

-

Service Valve
(three-way valve)

Charge hose
(Designed specifically for R22)

Compound
pressure
gauge

Pressure
gauge

Gauge Manifold
(Designed specifically for R22)

Handle Hi.

Vacuum pump

Vacuum pump adapter
(Anti-reverse flow type)
(Designed specifically for R22)

Charge hose
(Designed specifically for R22)

Service Port

–0.1MPa
(–76cmHg)

Handle Lo

Service Valve
(two-way valve)

(3) Air purge

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

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

(c)

(d)

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).

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

(f) Check f

(e) Detach the charge hoses, from the service port.

or possible leakage of gas in the connection parts of both indoor and outdoor.

Please use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back into the system.

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

Additional refrigerant charge

When refrigerant piping exceeds 7m conduct additional refrigerant charge by weight after refrigerant piping completion.

Additional charge amount per meter = 10g/m

[Example]

How much amount of additional charge for 25m piping?

(25 – 7)m 10g/m = 180g 180g for additional charge

(4) Insulation of connecting portion

(a) Cover the connecting 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.

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

Vinyl tape

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

·

⳯

-

32

-

(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

(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) T he r emote 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

5 m or less

Wireless remote
control

5 m or less

or less

5.6 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

Model

Item

SRK19CIS SRK25CIS

Low pressure (MPa) Cooling 0.42 ~ 0.62 0.39 ~ 0.59

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

Cooling 11 ~ 13 12 ~ 14

Running current (A) Cooling 7.4 10.2

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

the receiver status.

5.5 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.

(220V)

Remote control
available in this area.

Receiver

-

33

-

6 MAINTENANCE DATA

6.1 Troubleshooting procedures for electrical equipment

(1) Cautions

If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on

indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor

unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharging

this electrical charge (to DC 10 V or lower).

When taking out printed circuit boards, be sure to do so without exerting force on the circuit boards or package components.

When disconnecting and connecting connectors, take hold of the connector housing and do not pull on the lead wires.

(2) Items to check before troubleshooting

Have you thoroughly investigated the details of the trouble which the customer is complaining about?

Is the air conditioner running? Is it displaying any self-diagnosis information?

Is a power supply with the correct voltage connected?

Are the control lines connecting the indoor and outdoor units wired correctly and connected securely?

Is the outdoor unit’s refrigerant service valve open?

(3) Troubleshooting procedure (If the air conditioner does not run at all)

If the air conditioner does not run at all, diagnose the trouble using the following troubleshooting procedure. If the air conditioner

is running but breaks down, proceed to troubleshooting step (4).

Important When all the following conditions are met, we say that the air conditioner will not run at all.

The RUN light does not light up.

The flaps do not open.

The indoor unit fan motors do not run.

The self-diagnosis display does not function.

YES

YES

YES

NO

NO

NO

NO

YES

Troubleshooting procedure (If the air conditioner does not run at all)

Is the correct voltage
connected for the power
supply?

With the power off, do
the flaps open manually,
then close again when
the power is turned on?

Is there a reception
sound emitted from the
unit when it is operated
by the remote control?

Replace the indoor unit’s
circuit board and perform an
operation check.

Make sure the correct
voltage is connected, then
perform an operation check.

Is the current fuse on the
indoor unit’s board blown?

Proceed to the indoor unit
circuit board check.

Proceed to the wireless remote
control troubleshooting
procedure.

If the package components
are not damaged, replace
the fuse and perform an
operation check again.

* If the voltage is correct, it will be

within the following voltage range.
198 ~ 242 V

1

1

2

2

3

3

4

1

2

3

4

5

-

34

-

(4) Troubleshooting procedure (If the air conditioner runs)

NO

YES

Note (1) Even in cases where only intermittent stop data are generated, the air conditioning system is normal. However, if the same protective operation recurs

repeatedly (3 or more times), it will lead to customer complaints. Judge the conditions in comparison with the contents of the complaints.

Confirm the contents of the customer complaint.

Check the self-diagnosis display.

Eliminate the cause of the trouble and perform an
operation check.

Replace the faulty component, then perform an
operation check.

Identify the faulty component by using the check
procedure corresponding to the content of the trouble.

The cause of the trouble can
be specifically identified.

See page 35.

-

35

-

(5) Self-diagnosis table

When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of

display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble

display stops and the air conditioner resumes operation.

(1)

Notes (1) The air conditioner cannot be restarted using the remote control for 3 minutes after operation stops.

Indoor unit

display panel

Description

of trouble

Cause Display (flashing) condition

RUN
light

TIMER

light

6 time

flash

ON

When there is no signal between the indoor unit’s board and outdoor
unit’s board for 10 seconds or longer (when the power is turned on), or
when there is no signal for 1 minute 50 seconds or longer (during
operation)(the compressor is stopped).

When a heat exchanger sensor wire disconnection is detected while
operation is stopped. (If a temperature of –20

o

C or lower is detected for
3 minutes, it is judged that the wire is disconnected.)
(Not displayed

during operation.)

When a room temperature sensor wire disconnection is detected while
operation is stopped. (If a temperature of –20

o

C or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed

during operation.)

Defective power supply,

Broken signal wire,
defective in/outdoor unit
boards

Broken heat exchanger

sensor wire, poor connector
connection

Broken room temperature

sensor wire, poor connector
connection

Error of signal
transmission

Heat exchanger
sensor error

Room
temperature
sensor error

When conditions for turning the indoor unit’s fan motor on exist during
air conditioner operation, an indoor unit fan motor speed of 300 rpm or
lower is measured for 30 seconds or longer. (The air conditioner stops.)

When the value of the discharge pipe sensor exceeds the set value.
(The air conditioner stops.)

Defective fan motor, poor

connector connection

Gas shortage, defective

discharge pipe sensor,
closed service valve

Indoor fan
motor error

Over heat of
compressor

When a sensor wire disconnection is detected while operation is
stopped. (If a temperature of –64

o

C or lower is detected for 15 seconds,
it is judged that the wire is disconnected.)
(Not displayed during

operation.)

Broken heat exchanger

sensor wire, poor connector
connection

Outdoor heat
exchanger
sensor error

When an outdoor air temperature sensor wire disconnection is detected
while operation is stopped. (If a temperature of –64

o

C or lower is
detected for 15 seconds, it is judged that the wire is disconnected.)
(Not

displayed during operation.)

Broken outdoor air temp.

sensor wire, poor connector
connection

Outdoor air
temperature
sensor error

After the compressor has operated for 9 minutes continuously, if there
is a disconnected signal for the discharge pipe temperature sensor
detected –64

o

C for 15 seconds.

Broken discharge pipe

sensor wire, poor connector
connection

Discharge pipe
sensor error

When the indoor heat exchanger temperature does not fall to 25

o

C or
below for 40 minutes after 5 minutes have elapsed since the compressor
operation start.

Broken compressor wire
Broken discharge pipe

sensor wire, poor connector
connection

Compressor blockage

Abnormality of
outdoor unit

ON

1 time

flash

ON

2 time

flash

ON

ON

6 time

flash

5 time

flash

2 time

flash

Keeps

flashing

4 time

flash

Keeps

flashing

1 time

flash

Keeps

flashing

2 time

flash

ON

·

·

·

·

·

·

·

·

·

·

·

-

36

-

(6) Inspection procedures corresponding to detail of trouble

Sensor error

[Broken sensor wire,
connector poor connection]

(Shortcircuit)

(Broken wire)

Is connector connection good?

YES

YES

NO

NO

Replace PCB.

Correct connection.

Replace sensor.Is sensor resistance value good?

Sensor temperature characteristics

(Room temp., indoor unit heat exchanger
temp., outdoor unit heat exchanger
temp., outdoor air temp.)

Temperature (˚C)

Resistance (kΩ

)

30

25

20

15

10

5

30

20

10

40 50 60

70

0

–10

Temperature (˚C)

ΩΩ

Resistance (k ) Temperature (˚C) Resistance (k )

0 164 70 8.7

5 127 75 7.3

10 99 80 6.2

15 78 85 5.3

20 62 90 4.5

25 50 95 3.9

30 40 100 3.3

35 32 105 2.9

40 26 110 2.5

45 21 115 2.2

50 17 120 1.9

55 14 125 1.6

60 12 130 1.4

65 10 135 1.3

Discharge pipe sensor temperature characteristics

Indoor fan motor error

[Defective fan motor, connector
poor connection, defective PCB]

Is connector connection good?

YES

NO

NO

Is the output of the indoor unit’s
printed circuit board normal?

Normal

NO

YES

YES

Correct connector connection

Is DC fan motor resistance value good?

Replace indoor PCB

Replace indoor fan motor

Notes (1) See pages 39 for the DC fan motor and indoor unit circuit

board check procedure.

(2) After making sure the DC fan motor and indoor unit circuit

board are normal, connect the connectors and confirm that
the fan motor is turning.
(If power is turned on while one or the other is broken down,
it could cause the other to break down also.)

* Disconnect the fan motor

connector, then investigate
the DC fan motor and indoor
unit circuit board separately.

⽧

⽧

-

37

-

Over heat of compressor

[Gas shortage, defective discharge
pipe sensor]

Is discharge pipe sensor
resistance value good?

(page 36)

Is sufficient quantity of refrigerant
circulated?

Defective outdoor unit PCB

YES

YES

NO

NO

YES

NO

Check if there are any
places where gas is leaking.

Connector connection check, resistance
value check, replacement of discharge pipe
sensor

Does trouble persist after
charging gas?

Clogged capillary tube or
strainer, defective EEV, etc.

Error of signal transmission

[Wiring error including power cable, defective indoor/
outdoor unit PCB]

Does error persist after power
reset?

Are the lines connecting the indoor
and outdoor units connected
normally?

Is DC 0~Approx. 12V detected
between ~ terminals on
indoor unit terminal block?

YES

YES

NO

NO

YES

NO

Trouble by transient cause, not unit trouble.

Correct improper wire connection on indoor/
outdoor unit.

Defective indoor unit PCB

YES

YES

NO

NO

Is DC 0~Approx. 12V detected
between ~ terminals on
outdoor unit terminal block?

Is AC 220V applied between

~ on the outdoor side terminal

block?

Defective indoor unit PCB. Check crossover wires.

Defective outdoor unit PCB

Check crossover wires.

23

23

12

-

38

-

Continuous compressor operation command is not released.

Continuous compressor operation command is not released.
(Anti-frosting)

Abnormality of outdoor unit

[Compressor malfunction of
insufficient gas (refrigerant)]

Does compressor operation? Is capacitor for compressor normal?

Replace compressor.

Replace heat exchanger sensor

Insufficient gas

Is refrigerant amount normal?

Is heat exchanger sensor resistance
value good?

Is connector for compressor connection
good?

Does trouble persist after charging gas?

Clogged capillary tube or strainer,
defective EEV, etc.

Replace capacitor for compressor.

Correct connection

Check if there are any places where
gas is leaking

YES

YES

NO NO

NO

NO

NO

NO

YES

YES

YES

YES

(b) Outdoor unit

Phenomenon

Sensor

Shortcircuit Broken wire

Cooling System can be operated normally.

Cooling System can be operated normally.

Cooling

Operation
mode

System can be operated normally.

System can be operated normally.

Compressor stop

Heat exchanger
sensor

Outdoor air
temperature sensor

Discharge pipe
sensor

Compressor overload protection is disabled.
(Can be operated.)

(7) Phenomenon observed after shortcircuit, wire breakage on sensor.

(a) Indoor unit

Phenomenon

Sensor

Shortcircuit Broken wire

Cooling

Release of continuous compressor operation command

Compressor stop.

Cooling

(Abnormality of outdoor unit)

Operation
mode

Room temperature
sensor

Heat exchanger
sensor

Humidity Sensor Cooling

in the table below.

in the table below.

Humidity sensor operation

Humidity sensor assembly

Failure mode Control input circuit reading

Air conditioning system operation

Disconnected wire Humidity reading is 0% Operates in the Dry region

Disconnected wire Humidity reading is 0% Operates in the Dry region

Disconnected wire Humidity reading is 0% Operates in the Dry region

and are short

Humidity reading is 100% Operates in the Cooling region.

circuited

Disconnected

wire

Short

Circuit

Remark: Do not perform a continuity check of the humidity sensor with a tester. If DC current is applied, it

could damage the sensor.

Humidity sensor
element

Connector
(CnF)

1

1

1

1

122

12

-

39

-

(8) Checking the indoor electrical equipment

(a) Indoor unit circuit board check procedure

1) Press the unit’s ON/OFF button for 5 seconds or longer (a beep which indicates receiving will be emitted). Then check

the following items.

The indoor unit’s fan motor runs.

The RUN light lights up.

2) There should be voltage (AC 220 V) between terminals and on the terminal block.

With the analog tester set in the DC 30 V range, if the voltage at (+) and (-) is measured, the needle oscillates at

about 12V.

3) It is possible to run and stop the unit using the remote control.

If operation is as described above, the indoor unit’s board is normal.

Note (1) Check the voltage on the terminal block.

Power supply : Between - (AC 220V)
Signal : Between - (Changing between DC 0-Approx. 12V)

(b) Indoor unit fan motor check procedure

This is a diagnostic procedure for determining if the indoor unit’s fan motor or the circuit board is broken down.

1)2)Indoor unit printed circuit board output check

a) Turn off the power.

b) Remove the front panel, then disconnect the fan motor lead wire connector.

c) Tu rn on the power. If the unit operates when the ON/OFF button is pressed, if trouble is detected after the voltages in

the following figure are output for approximately 30 seconds, it means that the circuit board is normal and the fan

motor is broken down.

If the voltages in the following figure are not output at connector pins No. , and , the indoor unit’s circuit

board has failed and the fan motor is normal.

DC Fan motor resistance check

Notes (1) Remove the fan motor and measure it without power connected to it.

Notes (2) If the measured value is below the value when the motor is normal, it means

that the fan motor is faulty.

Measuring Point Resistance when Normal

– (Red – Black)

25 M

Ω

Ω

or higher

– (White – Black)

30 k or higher

FM

I

DC15V

Indoor unit
circuit board

DC 308V

DC several V
(4~6 V)

CNU

(–)

GND

Blue

Yellow

White

Black

Red

654

45

31

1

1

1

2

2

23

12

23

13

43

2

6543 12

·

·

-

40

-

(9) How to make sure of remote control

Note (1) Check method of remote control
(a) Press the reset switch of the remote control.
(b) If all LCD are displayed after one (1) display, it is basically normal.

(1)

Is remote

control normal?

YES

Again pushing
operating switch

Operating the unit?

NO

Does unit ON/OFF
button operates?

Operating the unit.

NO

NO

YES

YES

Remote control
defects

Abnormality is not
found.

Replace the display.

Control problem on
main unit

Is the unit

operable with remote

control?

Defective remote
control

NO

YES

Normal

-

41

-

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.

(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)

(d)

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

amount.

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 for a few seconds,

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

(e)

Open the valve and 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 refrigerant to the specified weight.

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

(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.

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.

Service hose

Liquid side

Gas side

Check joint

Charge hose

Vacuum
pump

Refrigerant
cylinder

Gauge
manifold

Stop the vacuum pump.

Start the vacuum pump.

Compound pressure gauge indicates –0.1 MPa (–76 cmHg)

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

Close low pressure valve of gauge manifold.

3

3

31

1

·

-

42

-

MEMO

-

43

-

PARTS LIST

INDOOR UNIT

SRK19CIS, SRK25CIS

OUTDOOR UNIT

SRC19CIS, SRC25CIS

-

44

-

-

45

-

-

46

-

-

47

-

-

48

-

-

49

-

-

50

-

-

51

-

-

52

-

-

53

-

-

54

-

-

55

-

-

56

-

-

57

-

-

58

-

-

59

-

-

60

-

-

61

-

-

62

-

-

63

-

ROOM AIR-CONDITIONING
TECHNICAL MANUAL & PARTS LIST

Manual No. '09·SRK-T·086