Mitsubishi Heavy Industries SRK09CI, SRK10CIV-4, SRK012CI, SRK13CIV-4 Technical Manual

ROOM AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

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

SRK09CI, 12CI SRK10CIV-4, 13CIV-4

TECHNICAL MANUAL

1. SRK09CI, 12CI ............................................................. 1

2. SRK10CIV-4, 13CIV-4.................................................. 33

( )

1. SRK09CI, 12CI

WALL MOUNTED TYPE ROOM AIR-CONDITIONER

Split system, air cooled cooling only type

CONTENTS

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

1.4.6 TIMER operation ................................................................................... 14

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

1.4.8 Outline of dry operation ....................................................................... 16

1.4.9 Outline of auto operation ..................................................................... 17

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

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

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

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

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

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

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

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

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

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

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

1.5.8 Precautions for wireless remote control installation and

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

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

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

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

1.1 GENERAL INFORMATION

1.1.1 Specific features

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

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

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

(1) Remote control flap

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

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

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

the next time.

(2) Auto operation

When the remote control is set on “auto(

) ”, 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.

TIMER lightRUN light

Room temperature sensor error

Indoor fan motor error

Heat exchanger sensor error

2 time flash

6 time flash

TIMER light

Trouble of outdoor unit

2 time flash

RUN light

1 time flash

1.1.2 How to read the model name

Example : SR K 09 C I

Series No.

Cooling only type

Product capacity

Wall mounted type

Split type room air-conditioner

1.2 SELECTION DATA

1.2.1 Specifications

Model SRK09CI (Indoor unit)

SRC09CI (Outdoor unit)

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

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

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

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

(4) Expressed in sound pressure level.

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

Item

Model

SRK09CI SRC09CI

kW 2.64

Cooling capacity

(1)

BTU/h 9000

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

Cooling input kW 0.90

Running current (Cooling) A 4.2

Inrush current A 18

COP (In cooling) 2.93

Noise level

(4)

dB 41 49

Exterior dimensions

mm 268 × 790 × 224 540 × 645 × 245

Height × Width × Depth

Color Fine snow Polar white

Net weight kg 8.0 27 Refrigerant equipment

–

RSA201A034

Compressor types & Q’ty

Motor kW – 0.68

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant

(3)

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

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

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 22

Air flow (at High) CMM 9.0 24

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

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater –– Operation control

Wireless-Remote control –

Operation switch

Room temperature control Microcomputer thermostat –

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

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Thermostat (for compressor)

Fan motor error protection

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

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

–

Gas line : 0.33 m

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Recommended breaker size A 20

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

Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

Connection wiring

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27°C 19°C 35°C 24°C ISO-T1, JIS C9612

(220/230V)

Operation

data

(1)

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

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

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

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

(4) Expressed in sound pressure level.

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

Item

Model

SRK12CI SRC12CI

kW 3.37

Cooling capacity

(1)

BTU/h 11500

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

Cooling input kW 1.10

Running current (Cooling) A 5.1

Inrush current A 29

COP (In cooling) 3.06

Noise level

(4)

dB 42 49

Exterior dimensions

mm 268 × 790 × 224 540 × 780 × 290

Height × Width × Depth

Color Fine snow Stucco white

Net weight kg 8.5 33 Refrigerant equipment

–

RSA201A035

Compressor types & Q’ty

Motor kW – 1.0

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant

(3)

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

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

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 22

Air flow (at High) CMM 10.0 32

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

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater –– Operation control

Wireless-Remote control –

Operation switch

Room temperature control Microcomputer thermostat –

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

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Thermostat (for compressor)

Fan motor error protection

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

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

–

Gas line : 0.33 m

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Recommended breaker size A 20

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

Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

Connection wiring

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27°C 19°C 35°C 24°C ISO-T1, JIS C9612

Model SRK12CI (Indoor unit)

SRC12CI (Outdoor unit)

(220/230V)

Operation

data

(1)

1.2.2 Range of usage & limitations

1.2.3 Exterior dimensions

Indoor return air temperature (Upper, lower limits)

Refrigerant line (one way) length Max. 15m

All models

Refer to the selection chart

Power source voltage Rating ± 10%

Voltage at starting Min. 85% of rating

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

ON and OFF interval Max. 3 minutes

Outdoor air temperature (Upper, lower limits)

Vertical height difference between outdoor unit and indoor unit

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

Item

Models

(1) Indoor unit

Models SRK09CI, 12CI

Unit: mm

Piping hole (ø65)

( )

Piping hole (ø65)

53.5

09 :ø9.52 12 :ø12.7

Piping for Gas

53.5

44.5

7.5

44.5

43.2

39.3

202450138

133.5450206.5

102.5

585

102.5

252.2

8.3

200

380.6

Piping for Liquid 448.6 (ø6.35)

Drain hose 520 (ø16)

17.5

788

VIEW A

2.1

960

124

224

Terminal block

Piping hole right(left)

268

790

→

Model SRC12CI

Unit: mm

Terminal block

ø12.7 (1/2")

ø6.35 (1/4")

Flare connecting

Service valve (Gas)

Service valve (Liquid) Flare connecting

Drain holes

2-16×12

138.4

40°

61.9

18.9165.1510104.9

439.1

111.4

99.4

349.5

313.1

43.1

290

350

23.5312.514

33.5

40°

42.595.9

540

780

Unit: mm

(2) Outdoor unit

Model SRC09CI

192.5

372.5

82.5

480

82.5

61.5

2-ø12

Terminal block

127.7

33.3

40˚

645

Drain holes

Service valve (Gas) Flare connecting ø9.52 (3/8˝)

Service valve (Liquid) Flare connecting ø6.35 (1/4˝)

13.5

274.5

300

245

540

100.3 39.7

14.4

1.2.4 Piping system

Model SRK09CI

Model SRK12CI

Outdoor unitIndoor unit

Room temp. sensor

Heat exchanger

Flare connecting

Heat exchanger sensor

Piping (Liquid) ø6.35

Check joint

Service valve (Liquid)

Flare connecting

Cooling cycle

Heat exchanger

Compressor

Accumulator

Service valve (Gas)

Capillary tube

Piping (Gas) ø9.52

Outdoor unitIndoor unit

Room temp. sensor

Heat exchanger

Flare connecting

Heat exchanger sensor

Piping (Liquid) ø6.35

Check joint

Service valve (Liquid)

Flare connecting

Cooling cycle

Heat exchanger

Compressor

Capillary tube

Accumulator

Service valve (Gas)

Capillary tube

Piping (Gas) ø12.7

1.2.5 Selection chart

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

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

(1) Coefficient of cooling capacity in relation to temperatures

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

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

14 16 18 20 22

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

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

1.0

0.99

0.975

How to obtain the cooling capacity

Example : The net cooling capacity of the model SRK12CI 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 =

SRK12CI

(11213 BTU/h)

Length 15m

Factor by air temperatures

(11500 BTU/h)

3370W 0.975

1.0

3286 W

✕✕

1.3 ELECTRICAL DATA

1.3.1 Electrical wiring

Models SRK09CI, 12CI

51C

Y/G

CFo

Outdoor unit

Indoor unit

BK Black

BL Blue

BR Brown

LB Light blue

YE Yellow

RD Red

OR Orange

WH White

Y/G Yellow/Green

Color symbol

Symbol Parts name Symbol Parts name

Capacitor for CM

FM Flap motor

Capacitor for FM

,Th

Sensor

Capacitor for FM

T Terminal block

CM Compressor motor

ZNR Varistor

F Fuse

51C Motor protector for CM

Fan motor (Indoor unit)

52C Magnetic contactor for CM

Fan motor (Outdoor unit)

Meaning of marks

Notes (1) : denotes magnetized relay

: denotes demagnetized relay

(2) Th

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

Operation

Cooling

Relay symbol Control part

52C CM

Table of relay operations

Power source 220/230V 50Hz

Printed circuit board

WH BK

Th1

Th2

Wireless R-Amp

Display

CNE

CNG

YE WH RD

CNW

IC15

ZNR

1 5 3

CNU

52C-4 52C-3

52C

F 250V 3.15A

CONTROL BOX

Back up Sw

CNM

t˚

FMI

FMo CM

1.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

1.4.1 Operation control function by remote control

Remote control

Models SRK09CI, 12CI

◆ Operation selection

◆ Indication selection

FAN SPEED button

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

•

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

OPERATION MODE select button

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

ON/OFF (luminous) button

Press for starting operation, press again for stopping.

HI POWER/ECONO button

This button changes the HIGH POWER/ ECONOMY mode.

AIR FLOW (UP/DOWN) button

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

SLEEP button

This button selects SLEEP operation.

CLEAN switch

This switch changes the CLEAN mode.

ON TIMER button

This button selects ON TIMER operation.

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

CANCEL button

RESET switch

Switch for resetting microcomputer and setting time.

SLEEP indicator

Indicates during SLEEP operation.

TEMPERATURE indicator

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

FAN SPEED indicator

Indicates set air flow rate with lamp.

CLEAN indicator

Indicates during CLEAN operation.

ON/OFF TIMER indicator

Indicates during ON/OFF TIMER operation.

AIR FLOW indicator

Shows selected flap mode.

HI POWER/ECONO MODE indicator

Indicates during HIGH POWER/ECONOMY mode operation.

[

OPERATION MODE indicator

Indicates selected operation with lamp.

(Auto)•(Cool)• (Fan) •(Dry)]

OFF TIMER button

This button selects OFF TIMER operation.

TEMPERATURE button

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

TIME indicator

Indicates present time or TIMER setting time.

Unit indication selection

Models SRK09CI, 12CI

Unit ON/OFF button

1.4.2 Unit ON/OFF button

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

unit on and off.

(1) Operation

Push the button once to place the unit in the 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 23ºC

Dry About 24ºC

Auto Auto

Continuous

1.4.3 Power blackout auto restart function

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

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

(2) The following settings will be cancelled:

(a) TIMER settings

(b) HIGH POWER operations

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

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

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

TIMER.

(3)

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

Jumper wire (J7)

RUN light (green)

Illuminates during operation and ‘CLEAN operation’.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HIGH POWER operation.

ECONO light (orange)

Illuminates during ECONOMY operation.

1.4.4 Custom cord switching procedure

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

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

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

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

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

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

using wire cutters.

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

wires, etc.

(2) Modifying the wireless remote control

(a) Remove the battery.

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

Jumper wire (J6)

1.4.5 Flap control

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

(1) Swing flap

Flap moves in upward and downward directions continuously.

(2) When not operating

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

(3) Memory flap (Flap stopped)

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

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

¡ Recommendable stopping angle of the flap

Horizontal blowing

COOL•DRY

Cut

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

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

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

↑↑

Current operation

Correction value

start time

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

(Example) Cooling

Room temperature

Setting temperature

Operation starting time

Time

Setting time

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

Start

TIMER operation (time)

Temperature setting (˚C)

Cooling

(2) SLEEP operation

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

ture.

1.0

-1.0

0 1.0 2.0

1.4.6 TIMER operation

(1) Comfortable TIMER setting (ON TIMER)

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

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

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

(Max. 60 minutes)

Operation mode Operation start time correction value (Min.)

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

< =

3 Room temp. – Setting temp.

< =

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.

(3) OFF TIMER operation

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

1.4.7 Outline of cooling operation

(1) Operation of major fanctional components

(2) Fan speed switching

(a) Auto fan control

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

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

(3) Thermostat operation

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

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

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

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

The set temperature changes as shown at right, and the

indoor unit fan speed is set on speed 2.

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

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

operation.

Indoor fan motor

Flap

Display

52C

Outdoor fan motor

ON or OFF

Lights up

OFF

ON or OFF

Lights up

OFF

Stop position control

Lights up or flashes

OFF

When the compressor

command is OFF

When the compressor

command is ON

When the compressor goes

OFF due to an anomalous stop.

Functional components

Item

Swing flap

Swing stop

Auto fan control

Speed 5

Speed 3

AUTO HIGH MED

Speed 2

LOW

Flow control

Fan speed switching

Speed 4

Speed 3

Speed 2

Thermostat setting point

Speed 5

+1 +2 +3 +4

OFF

Set temp.

-1

Room temp.

Compressor Outdoor fan

Indoor unit fan

Outdoor unit fan

Compressor

Speed 6 fixed

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

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

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

(3) Dry operation

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

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

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

1.4.8 Outline of 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) Start up operation

OFF

912

OFF

Compressor and outdoor fan

Speed 2

Indoor fan

Start Temperature check

Start

Temperature check

Compressor and outdoor fan

Indoor fan

Operation block decision

C.D block

A.B block

minutes

Speed 2

Speed 1

20 seconds

OFF

Compressor and outdoor fan

Indoor fan

D block

Compressor and outdoor fan

Indoor fan

C block

Compressor and outdoor fan

Indoor fan

B block

Compressor and outdoor fan

Indoor fan

A block

20 seconds

minutes

Start Temperature check Start Temperature check

Operation block decision

20 seconds

minutes

Start Temperature check Temperature check

Operation block decision

Start

Speed 1

OFF

Speed 1

Speed 2

Running time

Running start ~ 1 hour

1~2 hours

2 hours ~

Set temperature compensation

Set temperature +0.5

Set temperature +1.0

Set temperature +1.5

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

The set temperature changes as shown at right, and the

indoor unit fan speed is set on speed 2.

D block C block B block A block

–2 0 +3

Room temp. – Setting temp.(deg)

Speed 2

1.4.9 Outline of auto operation

(1) Determination of operation mode

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

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

1.4.10 Outline of fan operation

(1) Operation of major fanctional components

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

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

52C

Indoor fan motor

Outdoor fan motor

Flap

Speed 6 Speed 5 Speed 4

OFF

ON or OFF

Speed 3 Speed 2 Speed 1

HIGH

POWER

AUTO HIGH MED LOW ECONOMY

Functional components

Fan speed switching

Indoor unit fan

Outdoor unit fan

Compressor

Speed 6 fixed

OFF

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

Room temperature<26°C 26°C

< =

Room temperature

Operation mode Dry Cooling

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

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

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

mode, the operation mode changes.

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

wireless remote control and the setting temperature.

Signals of wireless remote control (Display)

–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6

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

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

1.4.11 Outline of clean operation

Cooling, Dry, Auto (Cooling, Dry); after operation has stopped, the moisture inside the dryer air conditioner, controls the production of

fungus etc.

(1) Operating condition

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

(2) Detail of operation

(3) Reset condition

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

Compressor OFF

Indoor fan motor Speed 1

Outdoor fan motor OFF

Flap Fully closed

1.4.12 Protective control function

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

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

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

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

2) and

timer (built into microcomputer circuit) functions.

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

CM, FM

O stoppage condition

1 Temperature of heat exchanger is

2.5˚C or lower.

2 As least 3 minutes has passed since

the compressor started.

Indoor heat exchanger temperature (˚C)

CM, FMO re-starting condition

1 Temperature of heat exchanger is

8˚C or higher.

Set fan speed

Protects the fan tap just before frost prevention control

(2) 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.

(3) Self diagnosis function

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

it will be indicated by flashing lights.

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

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

occurs. (The TIMER light flashes 2 times.)

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

RUN light will flash.

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

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

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

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

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

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

2.5 8

1.5 APPLICATION DATA SAFETY PRECAUTIONS

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

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

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

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

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

that is mentioned.

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

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

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

WARNING

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

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

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

ment such as engineering shop could cause equipment malfunction.

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

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

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

result in water leakage, electric shocks and fires.

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

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

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

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

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

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

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

can also result heat generation or fire.

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

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

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

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

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

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

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

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

CAUTION

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

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

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

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

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

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

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

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

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

observe this may result in injury.

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

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

1.5.1 Selection of location for installation

(1) Indoor unit

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

air can be evenly distributed.

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

space mentioned right can be secured)

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

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

the sun or the strong rays of the street lighting.

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

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

(To prevent interference to images and sounds.)

(2) Outdoor unit

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

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

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

* Avoid installing in the following places.

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

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

•A place exposed to strong wind.

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

Model

All models

Item One way piping length (R) 15 m

Outdoor unit is lower

5 m

Outdoor unit is higher

5 m

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

installed at a distance of 10cm from walls.

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

sufficient space between the unit and wall shall be secured.

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

above shall be secured.

(3) Limitations for one way piping length and vertical

height difference.

(

)

Vertical height difference (h)

6.5 cm

5 cm

10 cm

60 cm MIN (09 type: 30 cm MIN)

Air intake

10 cm MIN

Air outlet

Air intake

No obstacles (Service space for electrical parts)

Right side

Left side

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

1.5.2 Installation of indoor unit

(1) Installation of installation board

(a) Fixing of installation board

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

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

(a) Drill a hole with ø65

whole core drill

(b) Adjusting sleeve length

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

Standard hole

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

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

indoor side to outdoor side.

Indoor side Outdoor side

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

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

Wall thickness

+ 1.5 cm

Indoor side Outdoor side

Turn to tighten

Paste

View of sleeve when installed

Inclined flange

Sealing plate

Sleeve

Indoor side Outdoor side

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

Mating mark for level surface

450

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit : mm

Piping hole( 65) Piping hole( 65)

Installation board

Indoor unit

53.5

Piping for Gas 380.6

Piping for Liquid 448.6

Drain hose 520( 16)

53.5

Space *

for service

Space

for service

44.5

252.2

7.5

8.3

Space for

service

Space for service 100

102.5

585

102.5

133.5

450206.5

202450138

44.5

43.2

39.3

200

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

(3) Preparation of indoor unit

(a) Mounting of connecting wires

1) Remove the lid.

2) Remove the wiring clamp.

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

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

H05RNR3G1.5 (Example) or 245IEC57

H Harmonized cable type

05 300/500 volts

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

3 Number of conductors

G One conductor of the cables is the earth conductor

(yellow/green)

1.5 Section of copper wire (mm

)

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

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

• Affix the connection wire using the wiring clamp.

4) Fix the connecting wire by wiring clamp.

5) Attach the lid.

Pipe

Drain hose

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

For power supply, indoor outdoor

1 Brown

2 Blue

(b) Shaping the pipe

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

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

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

[ Top View ]

• Loosen and remove the spring-type clamp.

• Remove with your hand or a pair of pliers.

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

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

Left Side Piping Right Side Piping

Right rear piping

Left rear piping

Left side piping Right side piping

Lid

Screw *

Clamp

Terminal block

[ Procedure for exchanging the drain hose ]

Left downward

Right

Rear

Downward

Left rear

Left

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

Wall

Gutter

Pipes storage area

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

• Do not make traps in the drain hose line.

Inverted slipe

Trap

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

Declining slope

(e) Securing the indoor unit to the installation board

•

How to remove the indoor unit from the installation board

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

latch, and slightly pull it toward you.

(both right and left hand sides)

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

stallation board)

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

removed from the installation board.

(4) Removal and installation of the front panel

(a) Removing

• Remove the 2 set screws.

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

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

(b) Fitting

• Do remove the air filter.

• Cover the body with the front panel.

• Push the circled portion at the front.

• Tighten the 2 set screws.

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

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

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

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

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

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

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

the center portion slightly.

illustration and pull it toward you.

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

panel from the position shown in right illustration, hold the

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

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

center portion slightly.

Set screws

Installation Steps

1 Pass the pipe through the hole

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

2 Gently push the lower part to

secure the unit.

The marked portion of the indoor unit bese lower latch

Lid

1 2

For power supply, indoor outdoor

1 Brown

2 Blue

Terminal block

Interconnecting wire

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

• Use one more spanner to fix the valve.

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Install the removed flared nuts to the pipes to be

connected, then flare the pipes.

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

Press

Remove

(Do not turn)

Spanner for fixing

the piping)

Torque wrench

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

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

Manifold Valve

-76 cm Hg

Handle Lo (pressure)

Charge hose

Service valve (Two-way valve)

Service port

Service valve (Three-way

valve)

Compound (Gauge)

Pressure gauge

Handle Hi (pressure)

Charge hose

Vacuum pump

1.5.3 Installation of outdoor unit

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

stable base.

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

minal numbers of indoor unit terminal block.

1.5.4 Connection of refrigerant pipings

(1) Preparation

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

(a) Indoor unit side

(b) Outdoor unit side

(2) Connection of refrigerant piping

(a) Indoor unit side

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

(b) Outdoor unit side

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

(3) Air purge

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

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

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

(– 76 cmHg).

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

(e) Detach the charge hoses.

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

♦ Additional refrigerant charge

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

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

[Example]

How much amount of additional charge for 15m piping?

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

(4) Insulation of connecting portion

Vinyl tape

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

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

Insulation

Refrigerant piping Electrical wiring

Covering tape Drain hose

Tapping screw

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

pipe cover and seal them.

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

will drip out.

(b) Finishing and fixing

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

conforms to which the pipe is attached.

2) Fix them with clamps as right figure.

1.5.5 Installation of remote control

(1) Mounting method of battery

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

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

(2) Fixing to pillar or wall

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

• Avoid installing it on a clay wall etc.

Battery

Cover

Screws

1.5.6 Earthing work

• Earth work shall be carried out without fail in order to prevent electric shock and noise generation.

• The connection of the earth cable to the following substances causes dangerous failures, therefore it shall never be done.

City water pipe, Town gas pipe, TV antenna, lightning conductor, telephone line, etc.

1.5.7 Test run

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

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

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

in order to protect the compressor.

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

(4) Make sure that drain flows properly.

(5) Standard operation data

Note (1) The data are measured at following conditions

Ambient air temperature

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

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

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

(220/230V)

Model

SRK09CI SRK12CI

Item

Low pressure (MPa) 0.40~0.60 0.39~0.59

13~16 12~15

Running current (A) 4.2 5.1

(b) When manipulating the remote control mounted on a

wall:

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

signal is audible) before mounting.

Notes (1) The remote control is correctly facing the

sensing element of the air conditioner when being manipulated.

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

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

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

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

or less

7 m or less

Wireless remote control

7 m or less

or less

1.5.8 Precautions for wireless remote control installation and operation

(1) Wireless remote control covers the following distances:

(a) When operating facing the air conditioner:

or less

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

the receiver status.

Remote control available in this area.

Receiver

1.6 MAINTENANCE DATA

1.6.1 Trouble shooting

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

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

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

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

ing printed circuit board.

Before exchanging Printed circuit board

Claim call from the user

Ascertain the nature of the claim.

Ascertain the operation status.

Does the trouble occur again?

Is this nonsense claim?

Operate the unit.

Does the trouble occur again?

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

YES

Does the trouble occur again?

Disconnect connectors and connect them again.

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

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

Unit did not cool, etc.

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

(Not too high?)

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

etc.

¡ Explain the function of the unit to user.

No need for PCB change

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

No need for PCB change

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

No need for PCB change

The cause is defective connector contact.

YES

(2) Indication of Self Diagnosis (Indoor unit)

TIMER light is lights continuously.

RUN light is flashing. (1 Time flash.)

RUN light is flashing. (2 Time flash.)

RUN light is flashing. (6 Time flash.)

TIMER light is flashing. (2 Time flash.)

Connect of Defect

Abnormality of heat exchanger sensor.

Abnormality of room temperature sensor.

Abnormality of indoor fan motor.

Abnormality of outdoor unit.

Place of defect

¡ Disconnection of heat exchanger sensor.

¡ Disconnection of room temperature

sensor.

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

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

RUN light is lights continuously.

Abnormality of sensor Disconnection of sensor and defective connection of connector

(Disconnection)

(Short circuit)

Resistance value

(kΩ)

Temperature (°C)

Is connection to connector good?

Is sensor resistance value normal?

Replace PCB.

Repair connector.

Replace sensor.

Ye s

Chart for sensor temperature resistance characteristics

(3) Troubleshooting

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

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

Ye s

Yes

Replace protective device.

Replace capacitor.

Is capacitor normal?

Insufficient gas.

Replace compressor.

Is protective device normal?

Does compressor operate?

Clogging of capillary tube. etc.

Is abnormality the same after gas charging?

Is refrigerant circulation volume normal?

Ye s

The fan motor is defective.

Repair the connector.

Is voltage being applied to the fan motor?

The indoor circuit board is defective.

Is the connector connection good?

+ 70 hidden pages

Mitsubishi Heavy Industries SRK09CI, SRK10CIV-4, SRK012CI, SRK13CIV-4 Technical Manual

Specifications and Main Features

Frequently Asked Questions

User Manual