Mitsubishi SRK10CFV-4, SRK13CFV-4 Technical Manual

ROOM AIR-CONDITIONING

TECHNICAL MANUAL & PARTS LIST

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

SRK10CFV-4, 13CFV-4

TECHNICAL MANUAL

CONTENTS

1. GENERAL INFORMATION ............................................................................... 2

1.1 Specific features ........................................................................................ 2

1.2 How to read the model name .................................................................... 2

2. SELECTION DATA............................................................................................ 3

2.1 Specifications............................................................................................. 3

2.2 Range of usage & limitations.................................................................... 5

2.3 Exterior dimensions .................................................................................. 5

2.4 Piping system............................................................................................. 6

2.5 Selection chart ........................................................................................... 7

3. ELECTRICAL DATA ......................................................................................... 8

3.1 Electrical wiring ......................................................................................... 8

4. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .................... 9

4.1 Operation control function by remote control switch ............................ 9

4.2 Unit ON/OFF button ................................................................................. 10

4.3 Power blackout auto restart function .................................................... 11

4.4 Custom cord switching procedure......................................................... 11

4.5 Flap and louver control ........................................................................... 12

4.6 3D auto operation .................................................................................... 12

4.7 Timer operation ........................................................................................ 13

4.8 Installation location setting .................................................................... 14

4.9 Outline of cooling operation ................................................................... 15

4.10 Outline of dehumidifying operation ....................................................... 16

4.11 Outline of automatic operation ............................................................... 17

4.12 Outline of fan operation .......................................................................... 17

4.13 Outline of clean operation....................................................................... 17

4.14 Protective control function ..................................................................... 18

5. APPLICATION DATA ...................................................................................... 19

5.1 Selection of location for installation ...................................................... 20

5.2 Installation of indoor unit ........................................................................ 21

5.3 Installation of outdoor unit ..................................................................... 24

5.4 Connection of refrigerant pipings .......................................................... 24

5.5 Installation of remote control switch ..................................................... 25

5.6 Earthing work ........................................................................................... 25

5.7 Test run ...................................................................................................... 26

5.8 Precautions for wireless remote control installation and

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

6. MAINTENANCE DATA.................................................................................... 27

6.1 Trouble shooting ...................................................................................... 27

6.2 Servicing ................................................................................................... 30

-

-

1

1 GENERAL INFORMATION

1.1 Specific features

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

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

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

(1) Remote control flap & louver

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

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

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

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

efficiently conditioned.

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

at the same position from the next time.

(2) Automatic operation

When the remote control switch is set on “auto(

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

(3) Self diagnosis function

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

follows.

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

TIMER light

ON

1 time flash

2 time flash

6 time flash

Heat exchanger sensor error

Room temperature sensor error

Indoor fan motor error

1.2 How to read the model name

Example : SR K 10 C FV -4

RUN light

ON

TIMER lightRUN light

2 time flash

Trouble of outdoor unit

For Asia

Series No.

Cooling only type

Product capacity

Wall mounted type

Split type room air-conditioner

-

-

2

2 SELECTION DATA

2.1 Specifications

Model SRK10CFV-4 (Indoor unit)

Item

Cooling capacity

Power source 1 Phase, 220V, 50Hz

(1)

Operation

data

Exterior dimensions

Color Fine snow Stucco white

Net weight kg 8.5 30
Refrigerant equipment

Compressor types & Q’ty

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

Refrigerant control Capillary tubes

Refrigerant

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

Fan type & Q’ty

Air flow (at High) CMM 9.0 26.5
Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––
Operation control

Operation switch
Room temperature control Microcomputer thermostat –

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

Safety equipment Frost protection,

Refrigerant

piping

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Connection
wiring

Accessories (included) Mounting kit

Optional parts –

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

SRC10CFV-4 (Outdoor unit)

Model

(1)

Cooling input kW 0.73

Running current (Cooling) A 3.4

Inrush current A 18

COP (In cooling) 3.62

Noise level

Height × Width × Depth

Motor kW – 0.69

Starting method – Line starting

Motor W 16 14

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

Insulation Necessary (Both sides)

(4)

(3)

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

Connecting method Terminal block (Screw fixing type)

Item Indoor air temperature Outdoor air temperature

Operation DB WB DB WB

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

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

BTU 9000

dB 39 45

mm 268 × 790 × 199 540 × 780 × 290

kg R22 0.9 (Pre-Charged up to the piping length of 7.5m)

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

SRK10CFV-4 SRC10CFV-4

–

Tangential fan × 1 Propeller fan × 1

Wireless-Remote control –

Fan motor error protection

Gas line : 0.33 m

RSA201A018

Internal thermostat (for compressor)

(220V)

–

–

Standards

-

-

3

Model SRK13CFV-4 (Indoor unit)

SRC13CFV-4 (Outdoor unit)

(220V)

Item

Cooling capacity

Power source 1 Phase, 220V, 50Hz

Cooling input kW 1.06

Running current (Cooling) A 4.9

(1)

Inrush current A 29

COP (In cooling) 3.45

Operation

data

Noise level

Exterior dimensions

Height × Width × Depth

Color Fine snow Stucco white

Net weight kg 8.5 37
Refrigerant equipment

Compressor types & Q’ty

Motor kW – 1.09

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant

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

Fan type & Q’ty

Motor W 16 22

Air flow (at High) CMM 9.5 29.5
Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––
Operation control

Operation switch
Room temperature control Microcomputer thermostat –

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

Safety equipment Frost 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

Refrigerant

piping

Insulation Necessary (Both sides)

Drain hose Connectable

Power source cord 2.5 m (3 cores with Earth)

Connection
wiring

Accessories (included) Mounting kit

Optional parts –

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

(1)

(4)

(3)

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

Connecting method Terminal block (Screw fixing type)

Item Indoor air temperature Outdoor air temperature

Operation DB WB DB WB

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

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

Model

BTU 12500

dB 40 49

mm 268 × 790 × 199 540 × 780 × 290

kg R22 0.93 (Pre-Charged up to the piping length of 7.5m)

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

SRK13CFV-4 SRC13CFV-4

–

Tangential fan × 1 Propeller fan × 1

Wireless-Remote control –

Fan motor error protection

Gas line : 0.33 m

RSA201A017

Internal thermostat (for compressor)

–

–

Standards

-

-

4

2.2 Range of usage & limitations

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

Piping hole (ø65)

( )

Piping hole (ø65)

53.5

380.6

Pipng for Liquid 448.6 (ø6.35)

10 :ø9.52
13 :ø12.7

Pipng for Gas

Drain hose 520 (ø16)

53.5

44.5

252.2

7.5

8.3

102.5

585

102.5

133.5450206.5

202450138

44.5

43.2

39.3

200

45

45

60

17.5

60

27

788

60

9

45

199

3

Terminal block

Piping hole right(left)

268

790

A

VIEW A

→

2.3 Exterior dimensions

(1) Indoor unit

Models SRK10CFV-4, 13CFV-4

Unit: mm

-

-

5

(2) Outdoor unit

Outdoor unitIndoor unit

Terminal block

10: ø9.52 (3/8")
13: ø12.7 (1/2")

ø6.35 (1/4")

Flare connecting

Service valve (Gas)

Service valve (Liquid)
Flare connecting

Drain holes

2-16×12

138.4

40°

61.9

18.9165.1510104.9

439.1

111.4

99.4

349.5

313.1

43.1

290

12

50

350

23.5312.514

33.5

40°

42.595.9

14

540

780

Models SRC10CFV-4, 13CFV-S

Unit: mm

2.4 Piping system

Models All models

Room temp.
sensor

Heat
exchanger

Flare connecting

Flare connecting

10 : ø9.52

( )

13 : ø12.7

Heat
exchanger
sensor

Piping
(Gas)

Piping
(Liquid)
ø6.35

Service valve
(Gas)

Check joint

Service valve (Liquid)

-

6

Capillary tube

-

Compressor

Capillary tube

Cooling cycle

Accumulator

Heat
exchanger

2.5 Selection chart

14 16 18 20 22

15

20

25

30

35

40

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

43

24

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

Cooling

Applicable range

Coefficient of cooling

capacity in relation

to temperature

Cooling operation

Outdoor air D.B.

temperature

°C D.B.

Piping length [m]

Cooling

7

1.0

10

0.99

15

0.975

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.

How to obtain the cooling capacity

Example : The net cooling capacity of the model SRK13CFV-4 with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C

and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 12500 ✕ 0.975 ✕ 1.0 = 12187 BTU

SRK13CFV-4 Length 15m

Factor by air
temperatures

-

-

7

-

8

-

CM

51C

FMo

FM

I

SM

LM1

LM2

BK

BK

Th1

Th2

BKBLLB

Y/GN

Y/GN

TT

BK

BKWH

WH

WHWH BRBR

RD

WH

Y

WH

WH

WH

RD

WH

BK

L2

2

3

1

L3

L1

Sh

CFo

CF

I

ZNR

CONTROL BOX

Printed circuit board

Power source
220V 50Hz

F
(250V 3.15A)

Cc

OR

OR

Outdoor unit

Indoor unit

1

2

~

~

1

2

Wireless

Display

CNE

CNY

CNX

CNM

CNW

52C3N

52C

52C4

1

5
3

CNU

CNG

Back up Sw

R-Amp

BK Black

BL Blue

BR Brown

LB Light blue

Y Yellow

RD Red

OR Orange

WH White

Y/G Yellow/Green

Color symbol

Symbol

Parts name Symbol Parts name

C

C

Capacitor for CM

SM Flap motor

CF

I

Capacitor for FM

I

Th

1

,

2

Sensor

LM

1

,

2

Louver motor

CF

O

Capacitor for FM

O

T Terminal block

CM Compressor motor

ZNR Varistor

F Fuse

51C Motor protector for CM

FM

I

Fan motor (Indoor unit)

52C Magnetic contactor for CM

FM

O

Fan motor (Outdoor unit)

Meaning of marks

Notes (1) : denotes magnetized relay

×

: denotes demagnetized relay

(2) Th

1

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

Operation

Cooling

Relay symbol Control part

52C CM

Table of relay operations

3 ELECTRICAL DATA

3.1 Electrical wiring

Models SRK10CFV-4, 13CFV-4

4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

FAN SPEED button

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

•

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

OPERATION MODE select button

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

ON/OFF (luminous) button

Press for starting operation, press again
for stopping.

HI POWER/ECONO button

This button changes the HIGH POWER/
ECONOMY mode.

AIR FLOW (UP/DOWN) button

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

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

SLEEP button

This button changes to SLEEP operation.

CLEAN switch

This switch changes the CLEAN mode.

ON TIMER button

This button selects ON TIMER operation.

AIR FLOW (LEFT/RIGHT) button

3D AUTO button

This button sets 3D AUTO operation.

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

CANCEL button

RESET switch

Switch for resetting microcomputer and
setting time.

SLEEP indicator

Indicates during SLEEP operation.

TEMPERATURE indicator

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

FAN SPEED indicator

Indicates set air flow rate with lamp.

CLEAN indicator

Indicates during CLEAN operation.

ON/OFF TIMER indicator

Indicates during ON/OFF TIMER operation.

AIR FLOW indicator

Shows selected flap and louver mode.

3D AUTO indicator

Indicates during 3D AUTO operation.

HI POWER/ECONO MODE indicator

Indicates during HIGH POWER/ECONOMY
mode operation.

[

OPERATION MODE indicator

Indicates selected operation with lamp.

(Auto)•(Cool)• (Fan) •(Dry)]

OFF TIMER button

This button selects OFF TIMER operation.

TEMPERATURE button

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

TIME indicator

Indicates present time or timer setting time.

4.1 Operation control function by remote control switch

Remote control

Models SRK10CFV-4, 13CFV-4

◆ Operation selection

◆ Indication selection

-

-

9

Unit indication selection

3D AUTO light (green)

Illuminates during 3D AUTO operation.

HI POWER light (green)

Illuminates during HIGH POWER operation.

RUN light (green)

Illuminates during operation
and CLEAN operation.

TIMER light (yellow)

Illuminates during TIMER operation.

ECONO light (orange)

Illuminates during ECONOMY operation.

RUN light (green)

Illuminates during operation
and CLEAN operation.

TIMER light (yellow)

Illuminates during TIMER operation.

RUN TIMER

ON / OFF

HI POWER 3D AUTO

RUN TIMER

ON / OFF

HI POWER ECONO

HI POWER light (green)

Illuminates during HIGH POWER operation.

Unit ON/OFF button

Models SRK10CFV-4, 13CFV-4

Models SRK10CFV, 13CFV

4.2 Unit ON/OFF button

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

unit on and off.

(1) Operation

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

(2) Details of operation

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

whether to go into the cooling or thermal dry modes.

Function

Operation mode

Room temperature

setting

Fan speed Flap

Timer switch

Cooling About 24ºC

Thermal dry About 24ºC

Auto Auto

Continuous

-

10

-

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

Jumper wire (J7)

(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)

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.

Jumper wire (J6)

(2) Modifying the wireless remote control

(a) Remove the battery.

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

-

11

Cut

-

4.5 Flap and louver control

Operation step

Flap

Louver

Conditions for
jumping to next STEP

Fan speed Setting fan speed

_

20 cycle 60 cycle 60 cycle

Auto : HIGH POWER
Other than Auto: Setting fan speed

Setting fan speed

STEP1 STEP2 STEP3 STEP4

Left louver

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

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

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

Right louver

Left louver Right louver

Left louver Right louver

Control the flap and louver by AIRFLOW

(1) Swing flap

Flap moves in upward and downward directions continuously.

(2) Swing louver

Louver moves in left and right directions continuously.

(3) When not operating

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

(4) Memory flap (Flap or Louver stopped)

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

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

next operation is started.

¡ Recommendable stopping angle of the flap



(UP/DOWN) and



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



COOL•DRY

4.6 3D auto operation

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

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

(1) Detail of operation

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

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

temperature and the setting temperature.

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

2) Room temperature – Setting temperature

Horizontal
blowing

<

5ºC: STEP3 → STEP4 are performed.

=

-

-

12

4.7 Timer operation

(1) Comfortable timer setting (ON timer)

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

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

between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature. (Max. 60

minutes)

Operation mode Operation start time correction value (Min.)

At cooling

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

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

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

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

(Example) Cooling

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

+5 No change –5

<

3 Room temp. – Setting temp.

=

<

1

=

Room temperature

Setting temperature

Operation starting time

Time

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

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

¡ 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

Setting time

start time

Correction value

(2) Sleep timer operation

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

Cooling, DRY

+

1.0

Temperature
setting (˚C)

Timer operation
(time)

0

-1.0

0 1.0 2.0

Start

(3) OFF timer operation

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

-

13

-

4.8 Installation location setting

Airflow range Airflow range Airflow range

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

1, 4

2
3

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

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

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

(1) Setting

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

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

2 Press the AIR FLOW

AIRFLOW

or more.

The installation location display illuminates.

3 Setting the air-conditioning installation location.

Press the AIR FLOW

location.

Each time the AIR FLOW

indicator is switched in the order of:

4 Press the ON/OFF button.

The air-conditioner's installation location is set.

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

installation location setting display illuminates).

(LEFT/RIGHT) button together for 5 seconds





(UP/DOWN) button and the



(LEFT/RIGHT) button and adjust to the desired



(LEFT/RIGHT) button is pressed, the



-

14

-