Mitsubishi Heavy Industries SRC10CDV-1, SRK13CDV-1, SRK10CDV-4, SRC10CDV-4, SRC13CDV-1 Technical Handbook

...

2004 ROOM AIR-CONDITIONING

TECHNICAL HANDBOOK

TABLE OF CONTENTS

SRK10CDV-1 SRC10CDV-1 SRK10CDV-4 SRC10CDV-4 SRK13CDV-1 SRC13CDV-1 SRK13CDV-4 SRC13CDV-4 SRK06CC-1 SRC06CC-1 SRK06CC-4 SRC06CC-4 SRK07CC-1 SRC07CC-1 SRK07CC-4 SRC07CC-4 SRK09CC-1 SRC09CC-1 SRK09CC-4 SRC09CC-4 SRK12CC-1 SRC12CC-1 SRK12CC-4 SRC12CC-4 SRK50A SRC50CA SRK56A SRC56CA SRK56A-4 SRC56CA-4

108

116

124

132

142

150

Technical manual

Item

Models

Parts list

Recommendable

spare parts price list

Models with “-4” have the “HEAVY DUTY” logo added on the front lower rightside.

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

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

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

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

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

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

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

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 ...................................................................... 23

5.4 Refrigerant piping ..................................................................................... 23

5.5 Test run ...................................................................................................... 25

5.6 Precautions for wireless remote controller installation and

operation ................................................................................................... 25

6. MAINTENANCE DATA .................................................................................... 26

6.1 Trouble shooting ....................................................................................... 26

6.2 Servicing.................................................................................................... 29

TECHNICAL MANUAL

MODELS SRK10CDV-1 SRK10CDV-4 SRK13CDV-1 SRK13CDV-4

1 GENERAL INFORMATION

1.1 Specific features

The “Mitsubishi Daiya” 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 equipment 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 controller.

¡ Air scroll: Flap operation is automatically control.

¡ Swing: This will swing the flap up and down.

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

the next time.

(2) Automatic Operation

When the remote control switch is set on “auto( ) ”, it will either automatically decide operation mode such as cooling and thermal

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

(3) Self diagnosis function

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

follows.

1.2 How to read the model name

Example : SR K 10 C DV - 1

Series No.

Cooling only type

Product capacity

Wall mounted type

Split type room air conditioner

Abnormality of room temperature thermistor.

TIMER lamp is light up.

RUN lamp is flashing. (1 Times/ 8sec.)

RUN lamp is flashing. (2 Times/ 8sec.)

Abnormality of heat exchanger thermistor.

Abnormality of indoor fan motor.

RUN lamp is flashing. (6 Times/ 8sec.)

Abnormality of outdoor unit.

RUN lamp is light up.

TIMER lamp is flashing. (2 Times/ 8sec.)

No lamps will flashing when the unit is operating.

}

2 SELECTION DATA

2.1 Specifications

Model SRK10CDV-1, -4 (Indoor unit)

SRC10CDV-1, -4 (Outdoor unit)

(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 less than 10 m, add 10 g refrigerant per meter and when it is 10 to 15 m, add 30 g refrigerant per meter.

(4) Expressed in sound pressure level.

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

Item

Model

SRK10CDV-1, -4 SRC10CDV-1, -4

Cooling capacity

(1)

W 2638

Power source 1 Phase, 220V, 50Hz

Cooling input kW 0.803

Running current (Cooling) A 4.2

Inrush current A 18.1

COP (In cooling) 3.29

Noise level

(4)

dB (A) 39 46

Exterior dimensions

mm 250 × 815 × 247 540 × 720 × 290

Height × Width × Depth

Color Cool white Stucco white

Net weight kg 9.0 32 Refrigerant equipment

–

RMC201A002

Compressor types & Q’ty

Motor kW – 0.75

Starting method – Line starting

Heat exchanger Louver fins & tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

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

Refrigerant oil R 0.35 (ATMOS M60 or SUNISO 4GDID) Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 15

Air flow (at High) CMM 8.5 30.0 Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater –– Operation control

Wireless-Remote controller –

Operation switch Room temperature control MC. Thermostat –

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

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Compressor overheat protection

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)

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

Operation

data

(1)

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

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

(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 less than 10 m, add 10 g refrigerant per meter and when it is 10 to 15 m, add 30 g refrigerant per meter.

(4) Expressed in sound pressure level.

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

Item

Model

SRK13CDV-1 SRC13CDV-1

Cooling capacity

(1)

W 3500

Power source 1 Phase, 220V, 50Hz

Cooling input kW 1.16

Running current (Cooling) A 6.1

Inrush current A 33.2

COP (In cooling) 3.28

Noise level

(4)

dB (A) 41 49

Exterior dimensions

mm 250 × 815 × 247 640 × 850 × 290

Height × Width × Depth

Color Cool white Stucco white

Net weight kg 9.0 40 Refrigerant equipment

–

RMC201A001

Compressor types & Q’ty

Motor kW – 1.3

Starting method – Line starting

Heat exchanger Louver fins & tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

kg R22 1.2 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R 0.48 (SUNISO 4GSD) Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 35

Air flow (at High) CMM 9.0 39.5 Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater –– Operation control

Wireless-Remote controller –

Operation switch Room temperature control MC. Thermostat –

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

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Internal 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)

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

Operation

data

(1)

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

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

Model SRK13CDV-1 (Indoor unit)

SRC13CDV-1 (Outdoor unit)

(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 less than 10 m, add 10 g refrigerant per meter and when it is 10 to 15 m, add 30 g refrigerant per meter.

(4) Expressed in sound pressure level.

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

Item

Model

SRK13CDV-4 SRC13CDV-4

Cooling capacity

(1)

W 3810

Power source 1 Phase, 220V, 50Hz

Cooling input kW 1.16

Running current (Cooling) A 6.1

Inrush current A 33.2

COP (In cooling) 3.28

Noise level

(4)

dB (A) 41 49

Exterior dimensions

mm 250 × 815 × 247 640 × 850 × 290

Height × Width × Depth

Color Cool white Stucco white

Net weight kg 9.0 40 Refrigerant equipment

–

RMC201A001

Compressor types & Q’ty

Motor kW – 1.3

Starting method – Line starting

Heat exchanger Louver fins & tubing

Refrigerant control Capillary tubes

Refrigerant

(3)

kg R22 1.2 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R 0.48 (SUNISO 4GSD) Air handling equipment

Tangential fan × 1 Propeller fan × 1

Fan type & Q’ty

Motor W 14 35

Air flow (at High) CMM 9.0 39.5 Air filter, Q’ty Polypropylene net (washable) × 2–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater –– Operation control

Wireless-Remote controller –

Operation switch Room temperature control MC. Thermostat –

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

–

HI POWER (Green), ECONO (Orange)

Safety equipment Frost protection,

Internal 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)

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

Operation

data

(1)

Refrigerant

piping

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

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

Model SRK13CDV-4 (Indoor unit)

SRC13CDV-4 (Outdoor unit)

2.2 Range of usage & limitations

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 SRK10CDV-1, 10CDV-4, 13CDV-1, 13CDV-4

Unit: mm

VIEW A

815

117.5

580 117.5

247

4.5

560

788

60 14.5

148.5

216.5216.5

8.2

44.5

236.1

5.7

450

67.5

42.7

47.2

175

44.5

216.5216.5

148.5

53.5

250

Piping for Gas

Terminal block

Piping hole right (left)

Drain hose 540 (ø16)

Piping for Liquid 465.1 (ø6.35)

Piping hole (ø65)

( )

10: ø9.52 13: ø12.7

397.1

(2) Outdoor unit

Models SRC10CDV-1, 10CDV-4

Drain hole

286.4

290

49.6

43.5

850

203.1

510 136.9

476

Elogated hole (2-12 x16)

314

328

Terminal block

Service valve (Liquid)

ø6.35 (1/4'')

Service valve (Gas)

ø12.7 (1/2'')

Ground terminal

124

34.6

20˚

42.7

100.3

640

Unit: mm

Model SRC13CDV-1, 13CDV-4

Unit: mm

290

540

14.4

47.4 42.6

264.5

404.5

510

720

17.8

Drain holes

39.7

99.9

340

312.5

13.5

139

2-16 x12

61.9

139.3 33.3

Flare connecting ø6.35 (1/4")

Service valve (Liquid)

40°

Flare connecting ø9.52 (3/8")

Service valve (Gas)

Terminal block

2.4 Piping system

Models SRK10CDV-1, 10CDV-4, 13CDV-1, 13CDV-4

Outdoor unitIndoor unit

Room temp. thermistor

Heat exchanger

Flare connecting

Heat exchanger thermistor

Piping (Liquid) ø6.35

Check joint

Service valve (Liquid)

Flare connecting

Cooling cycle

Heat exchanger

Compressor

Capillary tube

Accumulator

Service valve (Gas)

Capillary tube

( )

Piping

(Gas) 10 : ø9.52 13 : ø12.7

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 SRK13CDV-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 = 3810 ✕ 0.975 ✕ 1.0 = 3715 w

SRK13CDV-4

Length 15m

Factor by air temperatures

3 ELECTRICAL DATA

3.1 Electrical wiring

Models SRK10CDV-1, 10CDV-4

Power source 1 Phase 220V 50Hz

52C

Printed circuit board

51C

FMo

BKWH

CNC

CNE

CNM CNW

CNU

CNC

Sh1

52C352C4

52C

CNB

Y/GN

5 3

L1ShCFO

ZNR

F (3.15A)

CFI

Wireless

Display

R-Amp

HEAT EXCHANGER

Indoor unit Outdoor unit

Notes (1) : denotes magentized relay × : denotes demagnetized relay

(2) Th

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

Operation

Cooling

Relay symbol Control part

52C CM

Tab le of relay operations

Symbol Parts name Symbol Parts name

Capacitor for CM SM Flap motor

Capacitor for FM

Th1,

Thermistor

Capacitor for FM

Tr Transformer

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

BK Black

BL Blue

BR Brown

LB Light blue

YYellow

RD Red

OR Orange

WH White

Y/G Yellow/Green

Color symbol

Model SRK13CDV-1, 13CDV-4

Power source 1 Phase 220V 50Hz

52C

Printed circuit board

FMo

BKWH

CNC

CNE

CNM CNW

CNU

CNC

Sh1

52C352C4

52C

CNB

Y/GN

5 3

L1ShCFO

ZNR

F (3.15A)

CFI

Wireless

Display

R-Amp

HEAT EXCHANGER

Indoor unit Outdoor unit

Symbol Parts name Symbol Parts name

Capacitor for CM SM Flap motor

Capacitor for FM

Th1,

Thermistor

Capacitor for FM

Tr Transformer

CM Compressor motor ZNR Varistor

F Fuse 52C Magnetic contactor for CM

Fan motor (Indoor unit)

Fan motor (Outdoor unit)

Meaning of marks

BK Black

BL Blue

BR Brown

LB Light blue

YYellow

RD Red

OR Orange

WH White

Y/G Yellow/Green

Color symbol

Notes (1) : denotes magentized relay × : denotes demagnetized relay

(2) Th

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

Operation

Cooling

Relay symbol Control part

52C CM

Table of relay operations

MED

AUTO

HI POWER

ECONO

ON OFF

AM PM

HI POWER

TEMP

ECONO

AIR FLOW

CANCEL

ON OFF

RESERVE

TIMER

TIME

ACL

FAN SPEED

MODE

MED

AUTO

TIME

OFF

HI POWER

ECONO

ON OFF

AM PM

FAN SPEED button

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

• The above illustration shows all controls, but in practice

only the relevant parts are shown.

OPERATION MODE select button

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

AIR FLOW button

This button changes the flap mode. When pressed, this button changes the mode in the following order:

ON/OFF button

Press for starting operation, press again for stopping.

HI POWER button

This button changes the HI POWER mode.

ECONOMY button

This button changes the ECONOMY mode.

RESET switch

Switch for resetting microcomputer.

ON TIMER button

This button selects ON TIMER operation.

Clock switch

This switch for setting the clock.

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.)

CANCEL button

This button cancels the ON timer and OFF timer.

RESERVE button

This button sets the present time and TIMER time.

S Indication section

OPERATION MODE Indicator

Indicates selected operation with lamp.

[

(Auto) • (Cool) • (Fan) • (Dry)]

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.

AIR FLOW Indicator

Shows selected flap mode.

HI POWER MODE indicator

Indicates during Hi power mode operation.

ECONOMY MODE indicator

Indicates during economy mode operation.

ON TIMER Indicator

Indicates during ON TIMER operation.

Clock Indicator

Indicates present time or timer setting time.

OFF TIMER Indicator

Indicates during OFF TIMER operation.

Models All models

Remote controller

S Operation section

(Air scroll) (SWING)

4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Operation control function by remote controller

Unit indication section

Models All models

RUN HIPOWER ECONO TIMER

RUN light (green)

• Illuminates during operation.

TIMER light (yellow)

Illuminates during TIMER operation.

ECONOMY light (orange)

Illuminates during ECONOMY operation.

HI POWER light (green)

Illuminates during HI POWER operation.

(2) Back-up switch

When the remote controller batteries become weak, or if the remote controller is lost or malfunctioning, this switch may be used

to turn the unit on and off.

(a) Operation

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

(b) 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.

(3) Power blackout auto restart function

(a) Power blackout auto restart function is 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.

(b) The following settings will be cancelled:

1) Timer settings

2) 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) “REMOTE/AUTORESTART” is cut, auto restart is disabled. (See the diagram at right)

Function

Room temperature

Operation mode

setting

Fan speed Flap Timer switch

Cooling About 25ºC

Thermal dry About 25ºC

Auto Auto Continuous

ON/OFF button

(5) Comfort timer setting

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

comfort 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 thermistor) 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 timer ON time, operation starts regardless of the temperature of the room temperature thermistor (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 pleasant reservation operation, both the operation lamp and timer lamp illuminate and the timer lamp goes off after expiration of the timer, ON setting

time.

(4) Flap control

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

(a) Air scroll

The flap will be automatically set to the angle of air flow best to operation.

1) Starting time of operation

2) When not operating

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

(b) Memory flap

While the flap is operating if the AIRFLOW button is pushed once, it stops swinging at an angle.

As this angle is memorized in the microcomputer, the flap will be automatically set to the angle when next operation is

started.

¡ Recommendable stopping angle of the flap

Flap moves in upward and downward directions continuously.

Horizontal blowing

COOL•DRY

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

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

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

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

↑↑

Current operation Correction value start time

During cooling and

dry operation

Thick line : Rapid movement

Thin line : Slow movement

Stops for approximately 5 seconds in the horizontal position.

(6) Outline of cooling operation

(a) Operation of major fanctinal components

(b) Fan speed switching

1) Auto fan control

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

by the room temperature thermistor) and the termostat setting as shown below.

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

(d) High Power operation ( “HI POWER” button on the remote controller : ON)

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

(e) ECONO Operation ( “ECONO” button on the remote controller : 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 HI POWER operation.

(2) Protective functions will actuate with priority even during the HI POWER operation.

Indoor fan motor

Flaps

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 abnormal stop.

Functional components

Item

Air scroll

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.

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

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

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

(7) Outline of dehumidifying operation

(a) Choose the appropriate operation block area by the difference between room temperature and thermo-

stat setting temperature as shown below. ¡ Operation block area

(b) Start up operation

OFF

912

OFF

Compressor and outdoor fan

Set fan speed

Indoor fan

Start Temperature check

Start

Temperature check

Compressor and outdoor fan

Set fan speed

Indoor fan

Operation block decision

C.D Block

A.B Block

minutes

Speed 1Speed 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

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

(d) ECONO Operation ( “ECONO” button on the remote controlle : 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)

(8) Automatic operation

(a) 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.)

(9) Outline of fan operation

(a) Operation of major fanctional components

(b) High Power operation (“HI POWER” button on the remote controller : ON)

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

52C

Indoor fan motor

Outdoor fan motor

Flaps

Speed 6 Speed 5 Speed 5

OFF

ON or OFF

Speed 3 Speed 2 Speed 1

High power AUTO HIGH MED LOW ECONO

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 HI POWER operation.

Room temperature<26ºC 26ºC

Room temperature

Operation mode Dry Cooling

(b) 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.

(c) 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.

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

of the wireless remote controller and the setting temperature.

Signals of wireless remote controller (Display)

–6 –5 –4 –3 –2 –1 ±0+1+2+3+4+5+6

Setting Cooling 19 20 21 22 23 24 25 26 27 28 29 30 31

temperature Dehumidifying 19 20 21 22 23 24 25 26 27 28 29 30 31

(10) Protective control function

(a) Dew condensation prevention control for cooling operation

This prevents dew condensation, in the indoor unit, from occurring.

1) Operating condition: when 52C is kept ON for 30 min. after the unit starts operation.

2) Operation content: forces the indoor fan to change from Speed 1 to Speed 2.

3) Resetting condition: When 52C is off, or when dew condensation prevention control has been operating continu-

ously for 30 minutes.

(b) 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 conse-

quently 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

and timer (built into micro computer circuit) functions.

Also indoor fan is changed over to speed 1.

CM, FMO stoppage condition

1 Temperature of heat exchanger is

2.5˚C or lower.

2 As least 3 minutes has passed since

the compressor started.

Indoor heat exchanger temperature (˚C)

CM, FMO re-starting condition

1 Te mperature of heat exchanger is

8˚C or higher.

2 As least 3 minutes has passed since

the compressor stopped.

Set fan speed

speed 1

(d) Self diagnosis function

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

temperature, ) it will be indicated by flashing lamps.

1) Abnormality of outdoor unit: When the indoor heat exchanger temperature does not fall to 25ºC or below for 40

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

abnormality stop occurs. (The timer lamp flashes 2 times.)

2) Abnormality of indoor fan motor: The indoor fan motor revolves at a rate under 300 rpm for 30 seconds or

longer, the RUN lamp will flash.

3) Abnormality of heat exchanger thermistor: RUN lamp will flashing when the input temperature of the heat

exchanger thermistor measures less than –20ºC for more than 15

seconds with the airconditioner “OFF”. (will not flashing during

operation)

4) Abnormality room temperature thermistor: RUN lamp will flashing when the input temperature of the room

temperature thermistor measures less than –20ºC for more than

15 seconds with the airconditioner “OFF”. (will not flashing during

operation)

Note (1) If the above abnormalities happen concurrently, the lamp will flashing in the order of item number 1) through 4) above.

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.

2.5 8

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 16A) 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.

¡ Ta ke 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.

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 below 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.

(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.

Model

All models

Item One way piping length (R) 15 m

Outdoor unit is lower

5 m

Outdoor unit is higher

5 m

Left side

Right side

5 cm

10 cm

1.5 cm

6.5 cm

Air inlet

Air Outlet

100

600

No obstacles (Service space for electrical parts)

Unit : mm

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

installed at a distance of 10cm from walls.

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

sufficient space between the unit and wall shall be secured.

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

above shall be secured.

(3) Limitations for one way piping length and vertical

height difference.

()

Vertical height difference (H)

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

5.2 Installation of indoor unit

(1) Installation of installation board

(a) Fixing of installation board

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

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

(a) Drill a hole with ø65

whole core drill

(b) Adjusting sleeve length

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

Standard hole

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

Note (1) Drill a hall 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

580

450

117.5

148.5

216.5

117.5

42.7175

65 Speace

for service

15Speace

for service

8.2236.1

44.5

5.7

47.244.5

Speace for

service

Speace for service 100

216.5

148.5

67.553.5

Piping hole (ø65)Piping hole (ø65)

Piping for Gas 397.1

Piping for Liquid 465.1

Drain hose 540(ø16)

INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW)

Unit : mm

(3) Preparation of indoor unit

(a) Mounting of connecting wires

1) Remove the lid (R).

2) Remove the terminal cover.

3) Remove the wiring clamp.

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

(b) Protective taping (Protect the cable with tape at the section where the cable passes through the hole opened on the wall.)

circumstance.)

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

(Drain pipe relocation procedure)

Remove the drain pipe.

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

Connect the drain pipe.

¡ Loosen the spring

clamp and securely insert the drain pipe.

Note: If it is inserted in-

sufficiently, water leakage could result.

¡ Loosen the spring

clamp to remove.

¡ Remove by hand or

use cutting pliers, etc.

¡ Securely insert the

drain cap removed in the step 2.

Note: If it is inserted in

sufficiently, water leakage could result.

Since this air conditioner has been designed to collect dew

drops on the rear surface to the drain pan, do not attach the

power cord above the gutter.

Gutter

Wall

Pipe accommodation section

1 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.

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

3 Affix the connection wire using the wiring clamp.

5) Fix the connecting wire by wiring clamp.

6) Attach the lid.

7) Close the suction grille.

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

H05 RNR3G1.5 (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

4or5 Number of conductors

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

green)

1.5 Section of copper wire (mm2)

Clamp

Terminal cover

Lid (R)

Terminal block

(4) Installation on indoor unit

(a) Install the indoor unit on the mounting plate.

Hook the upper part of the indoor unit on the stoppers disposed at the upper part of the mounting plate and lightly push the lower part of the indoor unit so that the unit is fixed in position. ¡ When removing the indoor unit

1) Disconnect the lid at right and left.

2) Pull down the stoppers (right and left) provided at the bottom of the indoor unit base. (See the detail view shown at right.)

(b) Be sure not to leave any trap on the drain pipe.

5.3 Installation of outdoor unit

(1) Installation of outdoor unit

(a) Make sure that sufficient space for installation and service is secured. (b) Fix the leg sections of the unit on a firm base which will not play.

Attach cushion pads, etc. between the unit and the mounting fixtures not to transmit vibration to the building.

(Drain elbow should not be used where days when temperature drops below 0°C continue for several days. Draining may be disturbed by frozen water.)

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

bolts, wire, etc.

(2) Connection of indoor and outdoor connecting wiring

(a) Connect the wiring according to the number of the indoor terminal block. (Mis-wiring may cause the burning damage, and

make sure to connect correctly.)

Notes (1) To prevent the mis-operation by noise, when the connecting wire too long for indoor and outdoor. Please hide the fixed wire in the pipe or

use vinyl tape to set. Do not put wire into the unit.

(2) Please let the anchorized personal to decide by indoor wiring code whether connect the leakage breaker or not.

Indoor unit base bottom stopper (2 places at right, left)

Light push

Mounting plate

Wall

Declining slope

Inverted slope

Trap

Terminal block









Interconnecting wire

5.4 Refrigerant piping

(1) Preparation

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

Indoor unit side

Outdoor unit side

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Remove the flared nuts.

(on both liquid and gas sides)

¡ Install the removed flared nuts to the pipes to be connected,

then flare the pipes.

Dimension A Liquid side (φ6.35): 9-9.5 dia Gas side (φ9.52): 13.2-14 dia (φ12.7): 16.2-17 dia

Press

Remove

(Do not

turn)

Brown

For power supply, indoor outdoor

2 Blue

For power supply, indoor outdoor

Yellow/Green

Earth wiring terminal

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

(3) Air purge

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

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

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

(2) Connection of refrigerant piping

Indoor unit side

¡ Connect firmly gas and liquid side

pipings by Torque wrench.

Outdoor unit side

¡ Connect firmly gas and liquid side

pipings by Torque wrench.

¡ Specified torquing value:

Liquid side (ø6.35) : 15.7~19.6N·m (1.6~2.0kgf·m) Gas side (ø9.52) : 29.4~39.2N·m (3.0~4.0kgf·m) (ø12.7) : 39.2~49.0N·m (4.0~5.0kgf·m)

¡ Use one more spanner to fix the valve.

Spanner

(for fixing the piping)

Torque wrench

¡ Specified torquing value:

Liquid side (ø6.35) : 15.7~19.6N·m (1.6~2.0kgf·m) Gas side (ø9.52) : 29.4~39.2N·m (3.0~4.0kgf·m) (ø12.7) : 39.2~49.0N·m (4.0~5.0kgf·m)

Manifold Valve

-76 cm Hg

Handle Lo (pressure)

Charge hose

Stop valve (Two-way valve)

Service port

Stop valve (Three-way

valve)

Compound (Gauge)

Pressure gauge

Handle Hi (pressure)

Charge hose

Vacuum pump

♦ Additional refrigerant charge

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

7.5m over 10m:Additional charge amount per meter = 10g/m 10m over 15m:Additional charge amount per meter=30g/m

[Example]

How much amount of additional charge for 15m piping?

(10 – 7.5)m × 10g/m+(15-10)m×30g/m=175g 175g for additional charge

¡ All models

(4) Insulation of connecting portion

(a) Cover the connecting portion of the refrigerant piping with the pipe cover and seal them.

If neglecting to do so, moisture occurs on the piping and water will drip out.

Vinyl tape

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

(b) Finishing and fixing

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

that it conforms to which the pipe is attached.

(ii) Fix them with clamps as right figure.

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

Insulation

Refrigerant piping

Electrical wiring

Covering tape

Drain hose

Tapping screw

5.5 Test run

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

(2) When conducting trial run set the remote controller 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) Insert in electric plug into the electric outlet and make sure that it is not loose.

(a) When there is something wrong with the electric outlet and if the insertion of the electric plug is insufficient, there may occur

a burn out.

(b) It is very important to be careful of above when plugging in the unit to an already furnished electrical outlet.

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

(5) Make sure that drain flows properly.

(6) 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)

(220V)

Item

Model

SRK10CDV-1, 10CDV-4 SRK13CDV-4

Low pressure MPa (kgf/cm2)0.45~0.55 (0.52MPa) 0.45~0.55 (0.51MPa)

11~15 12~16

Running current (A) 4.2 6.1

(b) When manipulating the remote controller mounted on

a wall:

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

signal is audible) before mounting.

Notes (1) The remote controller 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

6 m or less

Wireless remote controller

5 m or less

Remote controller available in this area.

Receiver

or less

5.6 Precautions for wireless remote controller installation and operation

(1) Wireless remote controller covers the following distances:

(a) When operating facing the air conditioner:

or less

6 MAINTENANCE DATA

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 micro computer 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 lamp is lights continuously.

RUN lamp is flashing. (1 Time flash.)

RUN lamp is flashing. (2 Time flash.)

RUN lamp is flashing. (6 Time flash.)

TIMER lamp is flashing. (2 Time flash.)

Connect of Defect

Abnormality of heat exchanger thermistor.

Abnormality of room temperature thermistor.

Abnormality of indoor fan motor.

Abnormality of outdoor unit.

Place of defect

¡ Disconnection of heat exchanger thermistor.

¡ Disconnection of room temperature

thermistor.

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

¡ Compressor is defective. ¡ Capacitor is defective.

¡ Gas is short.

RUN lamp is lights continuously.

Abnormality of thermistor Disconnection of thermistor and defective connection of connector

(Disconnection)

(Short circuit)

Resistance value

(kΩ)

Temperature (°C)

Is connection to connector good?

Is thermistor resistance value normal?

Replace PCB.

Repair connector.

Replace thermistor.

Ye s

Chart for thermistor 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

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?

(4) Trouble Diagnostic Procedures

Unit malfunctions or does not stop.

Replace PCB.

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

Runaway of micro-

computer

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

No change.

Normal operation.

Indoor lamp of indoor unit does not illuminate.

Check receptacle voltage.

Check if PCB fuse is blown.

Check varistor.

Check transformer secondary voltage

Replace PCB.

Replace fuse.

Replace varistor.

Replace transformer

Outdoor fan does not operate.

Check voltage with fan connector.

Replace PCB.

Check capacitor.

Replace fan motor.

Replace capacitor.

Abnormal

Ye s

Normal

Unit Thermistor Operation

Function

Short circuit Broken connection

Cooling

Indoor unit

Room temperature thermistor

(1)

(Th1) except for “continuous” thermal setting.

Cooling will not operate

¡ FM

I : continuous operation

¡ CM,FM

o: stopped

Cooling will operate

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

minutes.

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

Continuous Cooling operation

¡ Cannot be turned ON/OFF by thermostat ¡ When FMI is on. “AUTO” is continuously

Heat exchanger thermistor (Th

Cooling will not operate.

Note (1) When the room temperature thermistor (Th

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

“CONTINUOUS”

+ 130 hidden pages

Mitsubishi Heavy Industries SRC10CDV-1, SRK13CDV-1, SRK10CDV-4, SRC10CDV-4, SRC13CDV-1 Technical Handbook

Specifications and Main Features

Frequently Asked Questions

User Manual