Mitsubishi SRK21CNS-S6, SRK26CNS-S6, SRK19CNS-S, SRK25CNS-S Technical Manual

RESIDENTIAL AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

WALL MOUNTED TYPE
RESIDENTIAL AIR-CONDITIONERS
(Split system, air cooled cooling only type)

SRK21CNS-S6
SRK26CNS-S6

Manual No.'14•SRK-T-164

-

1

-

'14•SRK-T-164

TECHNICAL MANUAL

-

2

-

'14•SRK-T-164

gs32+4

CONTENTS

1. SPECIFICATIONS .................................................................................... 4

(2) Outdoor units ...................................................................................... 8

(3) Wireless remote control

...................................................................... 10

........................................................................ 6

(1) Indoor units ......................................................................................... 6

2. EXTERIOR DIMENSIONS

3. ELECTRICAL WIRING ............................................................................. 11

(1) Indoor units ......................................................................................... 11

(2) Outdoor units ...................................................................................... 13

....................................................... 15

5. RANGE OF USAGE & LIMITATIONS

4. PIPING SYSTEM ..................................................................................... 14

............................................................................... 17

6. APPLICATION DATA

7. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ........... 28

(6) 3D auto operation

............................................................................. 32

4IMEROPERATION

................................................................................. 33

(5) Flap and louver control ..................................................................... 31

...................................................... 30(4) Custom cord switching procedure

........................................................................ 30(3) Auto restart function

(2) Unit ON/OFF button



(1) Operation control function by remote control ..................................... 28

(8) Installation location setting ................................................................. 33

(10) Outline of automatic operation .......................................................... 34

/UTLINEOFCOOLINGOPERATION .............................................................. 34

(11) Protective control function

.................................................................. 35

.............................................................................. 37

.................... 38

4ROUBLESHOOTINGPROCEDURE)FTHEAIRCONDITIONERRUNS

4ROUBLESHOOTINGPROCEDURE

(If the air conditioner does not run at all)

....... 37

(1) Cautions

............................................................................................ 37

(2) Items to check before troubleshooting ................................................ 37

3ELFDIAGNOSISTABLE 

(6) Inspection procedures corresponding to detail of trouble ................... 40

8. MAINTENANCE DATA

-

3

-

'14•SRK-T-164

gs32+4

(OWTOMAKESUREOFWIRELESSREMOTECONTROL ..................................... 45



0HENOMENONOBSERVEDAFTERSHORTCIRCUITWIREBREAKAGEONSENSOR

........ 43

#HECKINGTHEINDOORELECTRICALEQUIPMENT

.......................................... 44

■How to read the model name

Example: SRK 21 C

Series code

Cooling only type

Product capacity

Model name SRK : Wall mounted type

SRC : Outdoor unit

NS-S6

-

4

-

'14•SRK-T-164

1. SPECIFICATIONS

Model

Item

SRK21CNS-S6

Indoor unit SRK21CNS-S6 Outdoor unit SRC21CNS-S6
Cooling capacity (1) W 5300
Power supply 1 Phase, 220-240V, 50Hz

Operation
data (1)

Power
consumption

Cooling kW 1.46

Running
current

Cooling

A

6.4

Inrush current 3.6
COP Cooling 3.63
Noise
level

Cooling

Sound level dB(A) Hi : 47 Me : 42 Lo : 39 50

Power level dB 60 65
Exterior dimensions (Height x Width x Depth) mm 309 x 890 x 251 640 x 850 (+65) x 290
Exterior appearance

(Munsell color)

Fine snow

(8.0Y 9.3/0.1) near equivalent

Stucco white

(4.2Y 7.5/1.1) near equivalent

Net weight kg 12 44.5

Refrigerant
equipment

Compressor type & Q'ty — PA190M2AS-4KTL1 (Rotary type) x 1
Motor (Starting method) kW — PSC
Refrigerant oil 0.62 (ESTER OIL VG74)
Refrigerant (4) kg R410A 1.34 (Pre-Charged up to the piping length of 7.5m)
Heat exchanger Louver fins & inner grooved tubing Louver fins & inner grooved tubing
Refrigerant control Capillary tubes + Electronic expansion valve
Deice control Microcomputer control

Air handling
equipment

Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Motor W 30 40
Air flow Cooling m3/min 15 38
Fresh air intake Not possible —
Air filter, Quality / Quantity Polypropylene net (washable) x 2 —

Shock & vibration absorber — Cushion rubber (for compressor)

Operation
control

Operation switch Wireless remote control —
Room temperature control Microcomputer thermostat —

Operation Display

RUN : Green, TIMER : Yellow, HI POWER : Green,

3D AUTO : Green

Safety devices

Compressor overheat protection,

Frost protection, Serial signal error protection, Fan motor error protection,

Installation
data

Refrigerant piping size (O.D) mm Liquid line: φ6.35 (1/4") Gas line: φ15.88 (5/8")
Connecting method Flare connecting

Attached length of piping m

Liquid line : 0.55
Gas line : 0.49

—

Insulation for piping Necessary (Both sides), independent
Refrigerant line (one way) length

m

Max. 25

Vertical height difference between
outdoor unit and indoor unit

Max.15 (Outdoor unit is higher)

Max.15 (Outdoor unit is lower)
Drain hose Connectable (VP 16) —
Power cable 2m (3 Cores wih Earth)
Recommended breaker size A 20

Connection wiring

Size x Core number 1.5mm2 x 4 cores (Including earth cable)
Connecting method Terminal block (Screw fixing type)

Accessories (included)

Mounting kit

Option parts —

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

Item

Operation

Indoor air temperature Outdoor air temperature

Standards

DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C ISO-T1, JIS C 9612

(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) The operation data are applied to the 230V districts respectively.
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is 7.5m to 15m, additional refrigerant is not required.

The pipe length is 7.5m.

-

5

-

'14•SRK-T-164

Model

Item

SRK26CNS-S6

Indoor unit SRK26CNS-S6 Outdoor unit SRC26CNS-S6
Cooling capacity (1) W 7400
Power supply 1 Phase, 220-240V, 50Hz

Operation
data (1)

Power
consumption

Cooling kW 2.065

Running
current

Cooling

A

9.2

Inrush current 43.7
COP Cooling 3.58
Noise
level

Cooling

Sound level dB(A) Hi : 50 Me : 46 Lo : 43 55

Power level dB 60 67
Exterior dimensions (Height x Width x Depth) mm 318 x 1098 x 248 750 x 880 (+88) x 340
Exterior appearance

(Munsell color)

Fine snow

(8.0Y 9.3/0.1) near equivalent

Stucco white

(4.2Y 7.5/1.1) near equivalent

Net weight kg 14.5 53

Refrigerant
equipment

Compressor type & Q'ty — PA270G2CS-4MUL1 (Rotary type) x 1
Motor (Starting method) kW — PSC
Refrigerant oil 0.85 (ESTER OIL VG74)
Refrigerant (4) kg R410A 1.05 (Pre-Charged up to the piping length of 7m)
Heat exchanger Louver & inner grooved tubing Aluminium heat-exchanger
Refrigerant control Capillary tubes + Electronic expansion valve
Deice control Microcomputer control

Air handling
equipment

Fan type & Q'ty Tangential fan x 1 Propeller fan x 1
Motor W 56 90
Air flow Cooling m3/min Hi : 20.0 Me : 17.0 Lo : 14.0 60
Fresh air intake Not possible —
Air filter, Quality / Quantity Polypropylene net (washable) x 2 —

Shock & vibration absorber — Cushion rubber (for compressor)

Operation
control

Operation switch Wireless remote control —
Room temperature control Microcomputer thermostat —

Operation Display

RUN : Green, TIMER : Yellow, HI POWER : Green,

3D AUTO : Green

Safety devices

Compressor overheat protection,

Frost protection, Serial signal error protection, Fan motor error protection,

Installation
data

Refrigerant piping size (O.D) mm Liquid line :φ6.35 (1/4") Gas line :φ15.88 (5/8")
Connecting method Flare connecting

Attached length of piping m

Liquid line : 0.70
Gas line : 0.63

—

Insulation for piping Necessary (Both sides), independent
Refrigerant line (one way) length

m

Max. 25

Vertical height difference between
outdoor unit and indoor unit

Max.15 (Outdoor unit is higher)

Max.15 (Outdoor unit is lower)
Drain hose Connectable (VP 16) —
Power cable 2m (3 Cores wih Earth)
Recommended breaker size A 20

Connection wiring

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

Connecting method Terminal block (Screw fixing type)
Accessories (included) Mounting kit
Option parts —

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

Item

Operation

Indoor air temperature Outdoor air temperature

Standards

DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C ISO-T1, JIS C 9612

(2) This air-conditioner is manufactured and tested in conformity with the ISO.
(3) The operation data are applied to the 230V districts respectively.
(4) The refrigerant quantity to be charged includes the refrigerant in 7.5m connecting piping.
(Purging is not required even for the short piping.)
If the piping length is 7.5m to 15m, additional refrigerant is not required.

The pipe length is 7.5m.

-

6

-

'14•SRK-T-164

G

F

Space for installation and service when viewing from the front

Outlet for down piping

（Refer to the above view）

D C

A

E

B

Terminal block

881.9

59.926 20.9

59.9

46.5

61.5

46.5

61.5

890

309

9 61.5

3251

50 120 650 120 100

220 450 220

35 35

48.9222.5

48

48

5.7

295.4 7.9

15

（Service space）

100

Unit

54

46.5

（Service space）

（Service space）

（Service space）

Installation plate

491.1

520.8

559.1

58

61.5

2. EXTERIOR DIMENSIONS

(1) Indoor units

Model SRK21CNS-S6

Hole on wall for right rear piping

Hole on wall for left rear piping

Gas piping

Outlet for piping（on both side）

Drain hose

Outlet for wiring

Liquid piping

F

G

E

CDB

Symbol

A

（ø65）

VP16

ø6.35（1/4"）（Flare）

Content

ø15.88（5/8"）（Flare）

（ø65）

Wireless remote control

Unit:mm

60

150

17.3

-

7

-

'14•SRK-T-164

Model SRK26CNS-S6

Outlet for down piping

（Refer to the above view）

Hole on wall for right rear piping

Hole on wall for left rear piping

Gas piping

Outlet for piping（on both side）

Drain hose

Outlet for wiring

Liquid piping

F

G

E

CDB

Symbol

A

（ø65）

VP16

ø6.35（1/4"）（Flare）

Content

ø15.88（5/8"）（Flare）

（ø65）

D

C

B

A

E

Wireless remote control

G

F

Unit:mm

7753.5

633.5

703.5
792

15

7.7

44.5

44.5

301.8 8.5

5050

450349 299

106886106

100

100

50

49.5

221.5

25

25

（Service space）

（Service space）

（Service space）

Unit

Installation plate

Space for installation and service when viewing from the front

6-5X17.5（Slot hole）

43

4－12X18（Slot hole）

（Service space）

244 610 244

225

46

1098

318

3

248

410904

60

55

19

55

55

43.564

9

60

150

17.3

-

8

-

'14•SRK-T-164

(2) Outdoor units

Model SRC21CNS-S6

φ15.88（5／8"）（Flare）

Content

C Pipe／cable draw-out hole

D

E Anchor bolt hole

Drain discharge hole

Symbol

B

A Service valve connection（gas side）

M10×4places

φ20×3places

Service valve connection（liquid side）

φ6.35（1／4"）（Flare）

Minimum installation space

Notes

.sedisruofehtnosllawybdednuorrusebtontsumtI）1（

　（2） The unit must be fixed with anchor bolts. An anchor bolt must not

protrude more than 15mm.

　（3） Where the unit is subject to strong winds, lay it in such

a direction that the blower outlet faces perpendicularly

to the dominant wind direction.

　（4） Leave 1m or more space above the unit.

　（5） A wall in front of the blower outlet must not exceed the units height.

　（6） The model name label is attached on the right side of the unit.

L2

L3

L4

L1 600

100

100

Examples of

Dimensions

installation

15

640

100.3 39.7

40



40

125.4 33.3

Terminal block

43.549.6

153

476.3

203.1 510 136.9

850 65

17.9

21.9

286.4

50

12

14 312.5

340

13.5

103.2

385.9

Outlet

Intake

L3

L1

L2

Intake

Service

space

( )

L4

Open

2-16x12

240

290

320

Center of gravity

A

C

B

D

E

Unit:mm

-

9

-

'14•SRK-T-164

Model SRC26CNS-S6

φ15.88（5／8"）（Flare）

Content

C Pipe／cable draw-out hole

D

E Anchor bolt hole

Drain discharge hole

Symbol

B

A Service valve connection（gas side）

M10×4places

φ20×3places

Service valve connection（liquid side）

φ6.35（1／4"）（Flare）

Unit:mm

Minimum installation space

Notes

.sedisruofehtnosllawybdednuorrusebtontsumtI）1（

　（2） The unit must be fixed with anchor bolts. An anchor bolt must not

protrude more than 15mm.

　（3） Where the unit is subject to strong winds, lay it in such

a direction that the blower outlet faces perpendicularly

to the dominant wind direction.

　（4） Leave 1m or more space above the unit.

　（5） A wall in front of the blower outlet must not exceed the units height.

　（6） The model name label is attached on the right side of the unit.

L2

L3

L4

L1 600

100

100

Examples of

Dimensions

installation

Outlet

Intake

L3

L1

L2

Intake

Service

space

( )

L4

Open

150 580 150

88

223

533

61

25.8

29.8

61

47.5

60

15

380 1919

2-φ15

742

30



30



Terminal block

165.5 25

418

375

Center of gravity

150

880

340

D

E

B

C

A

24

103.4 48.5

278

-

10

-

'14•SRK-T-164

(3) Wireless remote control

Unit: mm

60

17.3

150

Unit: mm

17.3

150

-

11

-

'14•SRK-T-164

3. ELECTRICAL WIRING

(1) Indoor units

Model SRK21CNS-S6

250V

FUSE

3.15A

S/N

VARISTOR

FAN MOTOR

CNU

CNS

J

U

M

1
3
4
5
6

TO OUTSIDE

T

TERMINAL

1

2/N

3

UNIT

BLOCK

L

HEAT

EXCHANGER

BOARD

CIRCUIT

PRINTED

CNR

CNX2

CNX1

RED

WHITE

RED

WHITE

BLACK

BLUE

YELLOW

BLACK

CNG

CNE

DISPLAY

WIRELESS RECEIVER

CNF

BACK-UP SW

2

9

HEAT EXCHANGER
SENSOR 1

ROOM TEMP.
SENSOR

HUMIDITY

SENSOR

FLAP

MOTOR

MOTOR

LEFT

LOUVER

LOUVER

RIGHT

MOTOR

5 5

3

5

INTERFACE KIT

SC-BIKN

5

3

2

7

M

M

M

-

12

-

'14•SRK-T-164

Model SRK26CNS-S6

250V

FUSE

3.15A

S/N

VARISTOR

FAN MOTOR

CNU

CNS

INTERFACE KIT

SC-BIKN

J

M

1
3
4
5
6

5

TO OUTSIDE

T

TERMINAL

1

2/N

3

UNIT

BLOCK

L

HEAT

EXCHANGER

BOARD

CIRCUIT

PRINTED

FLAP

LOUVER

RIGHT

MOTOR

LEFT

CNX2

CNX1

M

M

M

5

5

5

LOUVER

MOTOR

MOTOR

RED

WHITE

RED

WHITE

BLACK

BLUE

YELLOW

BLACK

CNG

CNE

DISPLAY

WIRELESS RECEIVER

CNF

BACK-UP SW

2

8

HUMIDITY
SENSOR

HEAT EXCHANGER
SENSOR 1

ROOM TEMP.
SENSOR

t

t

U

-

13

-

'14•SRK-T-164

PRINTED CIRCUIT

BOARD

PRINTED CIRCUIT

BOARD

ELECTRIC EXPANSION VALVE（COIL）
HEAT EXCHANGER SENSOR
OUTDOOR AIR TEMP. SENSOR
DISCHARGE PIPE TEMP. SENSOR

RUNNING CAPACITOR FOR FAN MOTOR

RUNNING CAPACITOR FOR COMPRESSOR

COMPRESSOR MOTOR

DIODE STACK

FAN MOTOR

CFO

Th3
D.S
CC

EEV

Th2

Th1

FMo

CM

TERMINAL BLOCKT

MEANING OF SYMBOLS

PARTS NAME

SYMBOL

Y/GN

T

ELECTRIC EXPANSION VALVE（COIL）
HEAT EXCHANGER SENSOR
OUTDOOR AIR TEMP. SENSOR
DISCHARGE PIPE TEMP. SENSOR

RUNNING CAPACITOR FOR FAN MOTOR

RUNNING CAPACITOR FOR COMPRESSOR

COMPRESSOR MOTOR

DIODE STACK

FAN MOTOR

CFO

Th3
D.S
CC

EEV

Th2

Th1

FMo

CM

TERMINAL BLOCKT1,T2

MEANING OF SYMBOLS

PARTS NAME

SYMBOL

Y/GN

Y/GN

WH

(2) Outdoor units

Model SRC21CNS-S6

Model SRC26CNS-S6

BL

RD

OR

SYMBOL

BK

BLUE

ORANGE

RED

BLACK

COLOR COLOR

WH

SYMBOL

WHITE

WH

RD

BK

N

J

L

D.S

VARISTOR

+

-

CNG

Th2

EEV

CNE

Th1

Th3

CC

WH

CM2

CM1

BK

R

WH

RD

C

N

3

2

L

1

INDOOR UNIT

POWER SOURCE
220-240V 50Hz

S

YELLOW/

GREEN

Y/GN

FMo

OR

BL

WH

CFO

OR

WH

52X1

CM

BL

RD

OR

SYMBOL

BK

BLUE

ORANGE

RED

BLACK

COLOR COLOR

WH

SYMBOL

WHITE

YELLOW/

GREEN

Y/GN

WH

RD

BK

N

J

L

D.S

VARISTOR

+

-

CNG

Th2

EEV

CNE

Th1

Th3

CC

WH

CM2

CM1

BK

R

WH

RD

C

S

250V 3.15A

FUSE

FMo

OR

BL

WH

CFO

OR

WH

52X1

CM

N

3

2

1

L

N

BK

T1

T2

INDOOR UNIT

POWER SOURCE
220-240V 50Hz

250V 3.15A

FUSE

4

4

（52X1）

（52X1）

-

14

-

'14•SRK-T-164

4. PIPING SYSTEM

Model SRK21CNS-S6

Model SRK26CNS-S6

Outdoor unitIndoor unit

Room temp.
sensor

Humidity
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Liquid
pipe

ø

6.35

Gas pipe

ø15.88

Check joint

Service valve (Liquid)

Flare connecting

Discharge pipe
temp. sensor

Outdoor air
temp. sensor

Heat
exchanger

Heat exchanger
sensor

Compressor

Capillary tube

Strainer

Accumulator

Service valve
(Gas)

Electronic
expansion valve

Outdoor unitIndoor unit

Room temp.
sensor

Humidity
sensor

Heat
exchanger

Flare connecting

Heat
exchanger
sensor

Liquid
pipe
ø

6.35

Gas pipe

Check joint

Service valve (Liquid)

Flare connecting

Discharge pipe
temp. sensor

Outdoor air
temp. sensor

Heat
exchanger

Heat exchanger
sensor

Compressor

Capillary tube

Strainer

Strainer

Accumulator

Service valve
(Gas)

Electronic
expansion valve

ø

15.88

Cooling cycle

Cooling cycle

-

15

-

'14•SRK-T-164

5. RANGE OF USAGE & LIMITATIONS

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

(1) Coefficient of cooling capacity in relation to temperatures

All models

Models

Item

Indoor return air temperature
(

Upper, lower limits

)

Outdoor air temperature
(

Upper, lower limits

)

Refer to the selection chart

Refrigerant line (one way) length

Max. 25m

Max. 15m (Outdoor unit is higher

)

Max. 15m (Outdoor unit is lower

)

Min. 3 minutes

Max. 10 times/h

Min. 85% of rating

Vertical height difference between
outdoor unit and indoor unit

Power source voltage

Voltage at starting

Frequency of ON−OFF cycle

ON and OFF interval

Rating 10%

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.

-

16

-

'14•SRK-T-164

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

How to obtain the cooling capacity

=

Piping length [m]

Cooling

7

1.0

10

0.99

15

0.975

20

0.965

25

0.95

SRK21CNS-S6

SRK21CNS-S6

5300 5168

-

17

-

'14•SRK-T-164

6. APPLICATION DATA

Safety precautions

WALL TYPE AIR CONDITIONER

R410A REFRIGERANT USED

Read the “Safety precautions” carefully first of all and strictly follow it during the installation work in order to protect yourself.v
The precautionary items mentioned below are distinguished into two levels,v

WARNING

and

CAUTION

.

WARNING

: Wrong installation would cause serious consequences such as injuries or death.

CAUTION

: Wrong installation might cause serious consequences depending on circumstances.

Both mentions the important items to protect your health and safety so strictly follow them by any means.
Be sure to confirm no anomaly on the equipment by commissioning after completed installation and explain the operating methods as v
well as the maintenance methods of this equipment to the user according to the user’s manual.
Keep the installation manual together with user’s manual at a place where any user can read at any time. Moreover if necessary, ask v
to hand them to a new user.
For installing qualified personnel, take precautions in respect to themselves by using suitable protective clothing, groves, etc., and then v
perform the installation works.
Please pay attention not to fall down the tools, etc. when installing the unit at the high position.v
If unusual noise can be heard during operation, consult the dealer.v
The meanings of “Marks” used here are shown as follows:v

Never do it under any
circumstances.

Always do it according to the
instruction.

WARNING

Installation must be carried out by the qualified installer.v

If you install the system by yourself, it may cause serious trouble
such as water leaks, electric shocks, fire and personal injury, as a
result of a system malfunction. Do not carry out the installation and
maintenance work except the by qualified installer.

Install the system in full accordance with the installation v
manual.

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

Be sure to use only for household and residence.v

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

Use the original accessories and the specified components forv
installation.

If parts other than those prescribed by us are used, it may cause
water leaks, electric shocks, fire and personal injury.

Install the unit in a location with good support.v

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

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

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

Ventilate the working area well in the event of refrigerantv
leakage during installation.

If the density of refrigerant exceeds the limit, please consult the
dealer and install the ventilation system, otherwise lack of oxygen
can occur, which can cause serious accident.

When installing in small rooms, take prevention measures not v
to exceed the density limit of refrigerant in the event of leakage,
referred by the formula (accordance with ISO5149).

If the density of refrigerant exceeds the limit, please consult the
dealer and install the ventilation system, otherwise lack of oxygen
can occur, which can cause serious accident.

After completed installation, check that no refrigerant leaks v
from the system.

If refrigerant leaks into the room and comes into contact with an
oven or other hot surface, poisonous gas is produced.

Use the prescribed pipes, flare nuts and tools for R410A.v

Using existing parts (for R22 or R407C) can cause the unit failure
and serious accidents due to burst of the refrigerant circuit.

Tighten the flare nut by torque wrench with specified method.v

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

Do not open the operation valves for liquid line and gas line v
until completed refrigerant piping work, air tightness test and
evacuation.

If the compressor is operated in state of opening operation valves
before completed connection of refrigerant piping work, air can be
sucked into refrigerant circuit, which can cause burst or personal
injury due to anomalously high pressure in the refrigerant.

The electrical installation must be carried out by the qualifiedv
electrician in accordance with “the norm for electrical work” and
“national wiring regulation”, and the system must be connected
to the dedicated circuit.

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

Be sure to shut off the power before starting electrical work.v

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

Be sure to use the cables conformed to safety standard and v
cable ampacity for power distribution work.

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

This appliance must be connected to main power supply byv
means of a circuit breaker or switch (fuse 21 series: 20A,
26 series: 25A) with a contact separation of at least 3mm.

When plugging this appliance, a plug conforming to the norm v
IEC60884-1 must be used.

Use the prescribed cables for electrical connection, tighten v
the cables securely in terminal block and relieve the cables
correctly to prevent overloading the terminal blocks.

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

Arrange the wiring in the control box so that it cannot be v
pushed up further into the box. Install the service panel
correctly.

Incorrect installation may result in overheating and fire.

Be sure to fix up the service panels.v

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

Be sure to switch off the power supply in the event of v
installation, inspection or servicing.

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

Stop the compressor before removing the pipe after shutting v
the service valve on pump down work.

If the pipe is removed when the compressor is in operation with the
service valve open, air would be mixed in the refrigeration circuit and
it could cause explosion and injuries due to abnormal high pressure
in the cooling cycle.

Only use prescribed option parts. The installation must be v
carried out by the qualified installer.

If you install the system by yourself, it can cause serious trouble
such as w

ater leaks, electric shocks, fire.

Be sure to wear pr

otective goggles and gloves while at work.v

Earth leakage breaker must be installed.v

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

Do not put the drainage pipe directly into drainage channelsv
where poisonous gases such as sulphide gas can occur.

Poisonous gases will flow into the room through drainage pipe and
seriously affect the user’s health and safety. This can also cause the
corrosion of the indoor unit and a resultant unit failure or refrigerant
leak.

Ensure that no air enters in the refrigerant circuit when the unit v
is installed and removed.

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

Do not bundling, winding or processing for the power cord. Or,v
do not deforming the power plug due to tread it.

This may cause fire or heating.

Do not processing, splice the power cord, or share a socketv
with other power plugs.

This may cause fire or electric shock due to defecting contact,
defecting insulation and over-current etc.

Do not vent R410A into the atmosphere : R410A is a fluorinatedv
greenhouse gas, covered by the Kyoto Protocol with Global
Warming Potential (GWP)=1975.

Do not run the unit with removed panels or protections.v

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

Do not perform any change of protective device itself or its v
setup condition.

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

When install the unit, be sure to check whether the selection of installation place, power supply
specifications, usage limitation (piping length, height differences between indoor and outdoor
units, power supply voltage and etc.) and installation spaces.

-

18

-

'14•SRK-T-164

Safety precautions❚

CAUTION

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

Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line’s ground lead. Incorrect grounding can cause
unit faults such as electric shocks due to short-circuiting.

Use the circuit breaker of correct capacity. Circuit breaker •
should be the one that disconnect all poles under over current.

Using the incorrect one could cause the system failure and fi re.

Install isolator or disconnect switch on the power supply wiring •
in accordance with the local codes and regulations.

The isolator should be locked in OFF state in accordance with
EN60204-1.

Be sure to install indoor unit properly according to the •
instruction manual in order to run off the drainage smoothly.

Improper installation of indoor unit can cause dropping water into the
room and damaging personal property.

Install the drainage pipe to run off drainage securely according •
to the installation manual.

Incorrect installation of the drainage pipe can cause dropping water
into the room and damaging personal property.

Be sure to install the drainage pipe with descending slope of •
1/100 or more, and not to make traps and air-bleedings.

Check if the drainage runs off securely during commissioning and
ensure the space for inspection and maintenance.

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

Secure a space for installation, inspection and maintenance •
specifi ed in the manual.

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

Take care when carrying the unit by hand.•

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

Dispose of any packing materials correctly.•

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

For installation work, be careful not to get injured with the heat •
exchanger, piping fl are portion or screws etc.

Be sure to insulate the refrigerant pipes so as not to condense •
the ambient air moisture on them.

Insuffi cient insulation can cause condensation, which can lead to
moisture damage on the ceiling, fl oor, furniture and any other valuables.

When perform the air conditioner operation (cooling or drying

•

operation) in which ventilator is installed in the room. In this case, using
the air conditioner in parallel with the ventilator, there is the possibility
that drain water may backfl ow in accordance with the room lapse into
the negative pressure status. Therefore, set up the opening port such
as incorporate the air into the room that may appropriate to ventilation
(For example; Open the door a little). In addition, just as above, so set
up the opening port if the room lapse into negative pressure status due
to register of the wind for the high rise apartment etc.

Be sure to perform air tightness test by pressurizing with •
nitrogen gas after completed refrigerant piping work.

If the density of refrigerant exceeds the limit in the event of
refrigerant leakage in the small room, lack of oxygen can occur,
which can cause serious accidents.

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

Locations where carbon fi ber, metal powder or any powder is fl oating.

•

Locations where any substances that can affect the unit such as •
sulphide gas, chloride gas, acid and alkaline can occur.
Vehicles and ships.•
Locations where cosmetic or special sprays are often used.•
Locations with direct exposure of oil mist and steam such as •
kitchen and machine plant.
Locations where any machines which generate high frequency •
harmonics are used.
Locations with salty atmospheres such as coastlines. •
Locations with heavy snow (If installed, be sure to provide base •
fl ame and snow hood mentioned in the manual).
Locations where the unit is exposed to chimney smoke.•
Locations at high altitude (more than 1000m high).•
Locations with ammonic atmospheres.•
Locations where heat radiation from other heat source can affect •
the unit.
Locations without good air circulation.•
Locations with any obstacles which can prevent inlet and outlet air •
of the unit.
Locations where short circuit of air can occur (in case of multiple •
units installation).
Locations where strong air blows against the air outlet of outdoor unit.

•

Locations where something located above the unit could fall.•
It can cause remarkable decrease in performance, corrosion and
damage of components, malfunction and fi re.

Do not install the indoor unit in the locations listed below (Be

•

sure to install the indoor unit according to the installation manual
for each model because each indoor unit has each limitation).

Locations with any obstacles which can prevent inlet and outlet air •

of the unit.

Locations where vibration can be amplifi ed due to insuffi cient •

strength of structure.

Locations where the infrared receiver is exposed to the direct •

sunlight or the strong light beam (in case of the infrared

specifi cation unit).

Locations where an equipment affected by high harmonics is placed •

(TV set or radio receiver is placed within 1m).

Locations where drainage cannot run off safely.•
It can affect performance or function and etc.

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

Locations where discharged hot air or operating sound of the •

outdoor unit can bother neighborhood.

Locations where outlet air of the outdoor unit blows directly to •

plants. The outlet air can affect adversely to the plant etc.

Locations where vibration can be amplifi ed and transmitted due to •

insuffi cient strength of structure.

Locations where vibration and operation sound generated by the outdoor

•

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

Locations where an equipment affected by high harmonics is placed •

(TV set or radio receiver is placed within 1m).

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

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

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

Do not install the unit near the location where leakage of •
combustible gases can occur.

If leaked gases accumulate around the unit, it can cause fi re.

Do not use the indoor unit at the place where water splashes •
may occur such as in laundries.

Since the indoor unit is not waterproof, it can cause electric shocks
and fi re.

Do not install nor use the system close to the equipment that •
generates electromagnetic fi elds or high frequency harmonics.

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

Do not place any variables which will be damaged by getting •
wet under the indoor unit.

When the relative humidity is higher than 80% or drainage pipe is
clogged, condensation or drainage water can drop and it can cause
the damage of valuables.

Do not install the remote control at the direct sunlight.•

It can cause malfunction or deformation of the remote control.

Do not use the unit for special purposes such as storing foods, •
cooling precision instruments and preservation of animals,
plants or art.

It can cause the damage of the items.

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

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

Do not use the base fl ame for outdoor unit which is corroded or •
damaged due to long periods of operation.

Using an old and damage base fl ame can cause the unit falling down
and cause personal injury.

Do not use any materials other than a fuse with the correct •
rating in the location where fuses are to be used.

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

Do not touch any buttons with wet hands.•

It can cause electric shocks.

Do not touch any refrigerant pipes with your hands when the •
system is in operation.

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

Do not touch the suction or aluminum fi n on the outdoor unit.•

This may cause injury.

Do not put anything on the outdoor unit and operating unit.•

This may cause damage the objects or injury due to falling to the
object.

Do not use the unit for special purposes such as storing foods, •
cooling precision instruments and preservation of animals,
plants or art.

Do not clean up the unit with water.•

-

19

-

'14•SRK-T-164

① A place where good air circulation can be obtained and where rain,

snow or sunshine will not directly strike the unit.

② A place where discharged hot air or unit’s operating sound will not be

a nuisance to the neighborhood.

③ A place where servicing space can be secured.
④ A place where vibration will not be enlarged.

*Avoid installing in the following places.

sA place near the bedroom and the like, so that the operation noise

will cause no trouble.

s

A place where there is possibility of flammable gas leakage.

sA place exposed to strong wind.
sIn a salt-laden atmosphere or a place where the generation of oil

mist, vapor or fume is expected.

⑤ 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.

⑥ When the unit is installed, the space of the following dimension and

above shall be secured.

OUTDOOR UNIT

Note (1) If the wall is higher than 1.2 m or a ceiling

is present, distances larger than indicated in
the above table must be provided.

Selection of installation location

① Where there is no obstructions to the air flow and where the cooled

air can be evenly distributed.

② A solid place where the unit or the wall will not vibrate.
③ A place where there will be enough space for servicing. (Where

space mentioned right can be secured)

④ Where wiring and the piping work will be easy to conduct.
⑤ The place where receiving part is not exposed to the direct rays of

the sun or the strong rays of the street lighting.

⑥ A place where it can be easily drained.
⑦

A place separated at least 1m away from the television or the radio.
(To prevent interfence to images and sounds.)

⑧ A place that home appliance and household goods, etc. aren’t below

unit.

INDOOR UNIT

10 cm

5 cm

10 cm

Left
side

60 cm MIN

Air intake

10 cm MIN

10 cm
MIN

Air outlet

Air
intake

No obstacles
(Service space
for electrical
parts)

Right
side

)(

Standard accessories

(Installation kit)

Accessories for indoor unit

Q'ty

①

Installation board
(Attached to the rear of the indoor unit)

1

②

Wireless remote control 1

③

Remote control holder

④

Tapping screws
(for installation board 4dia. by 25mm)

5 (21)

10 (26)

⑤

Wood screw
(for remote control switch holder 3.5dia. by 16mm)

2

⑥

Baterry [R03 (AAA, Micro) 1.5V] 2

⑦

Air-cleaning fi 2sretl

⑧

Filter holders
(Attached to the front panel of the indoor unit)

2

Option parts Q'ty

ⓐ

Sealing plate 1

ⓑ

Sleeve 1

ⓒ

Inclination plate 1

ⓓ

Putty 1

ⓔ

Drain hose (extention hose) 1

ⓕ

Piping cover
(for insulation of connection piping)

1

Necessary tools for the installation work

1 Plus headed driver (Phillips screwdriver)

2 Knife

3 Saw

4 Tape measure

5 Hammer

6 Spanner wrench

7 Torque wrench

(

14.0 ~ 82.0N · m
(1.4 ~ 8.2kgf · m)

)

8 Hole core drill (65mm in diameter)

9 Wrench key (Hexagon) [4m/m]

10 Vacuum pump

11

Vacuum pump adapter
(Anti-reverse flow type)

(

Designed specifically

for R410A

)

12 Gauge manifold

(

Designed specifically

for R410A

)

13 Change hose

(

Designed specifically

for R410A

)

14 Flaring tool set

(

Designed specifically

for R410A

)

15 Gas leak detector

(

Designed specifically

for R410A

)

16

Gauge for projection adjustment (Used when flare is
made by using conventional flare tool)

17 Pipe bender

1