Mitsubishi Heavy Industries SRK20HD Bedienungsanleitung

WALL MOUNTED TYPE

ROOM AIR-CONDITIONER

Collection data

Manual No. ’05

SRK-T

045

(Split system, air to air heat pump type)

SRK20HD

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CONTENTS

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

1.1 Specific features ....................................................................................... 1

1.2 How to read the model name ................................................................... 1

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

2.1 Specifications ........................................................................................... 2

2.2 Range of usage & limitations .................................................................. 3

2.3 Exterior dimensions ................................................................................. 3

2.4 Piping system ........................................................................................... 4

2.5 Selection chart .......................................................................................... 5

3. ELECTRICAL DATA ........................................................................................ 6

3.1 Electrical wiring ........................................................................................ 6

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

4.1 Operation control function by remote control switch ........................... 7

4.2 Unit ON/OFF button .................................................................................. 8

4.3 Power blackout auto restart function ..................................................... 8

4.4 Flap control ............................................................................................... 9

4.5 Comfortable timer setting ........................................................................ 9

4.6 Outline of heating operation .................................................................... 10

4.7 Outline of cooling operation .................................................................... 13

4.8 Outline of dehumidifying operation ........................................................ 14

4.9 Automatic operation ................................................................................. 15

4.10 Protective control function ...................................................................... 15

5. APPLICATION DATA ....................................................................................... 17

5.1 Selection of location for installation ....................................................... 18

5.2 Installation of indoor unit......................................................................... 19

5.3 Installation of outdoor unit ...................................................................... 21

5.4 Refrigerant piping ..................................................................................... 21

5.5 Test run ...................................................................................................... 23

5.6 Precautions for wireless remote controller installation and

operation ................................................................................................... 23

6. MAINTENANCE DATA .................................................................................... 24

6.1 Trouble shooting....................................................................................... 24

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

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Serial signal transmission error

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 or heating equipment with opera-

tion 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, heating

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.

Series No.

Heat pump type

Product capacity

Wall mounted type

Split type room air-conditioner

1.2 How to read the model name

Example : SR K 20 H D

Room temperature sensor error

Indoor fan motor error

Heat exchanger sensor error

2 time flash

6 time flash

TIMER light

1 time flash

Outdoor unit heat exchanger

sensor error

Discharge pipe sensor error

Outdoor temperature sensor error

2 time flash

4 time flash

RUN light

keeps flashing

1 time flash

OFF

Outdoor unit error

Compressor overheat

Current cut

2 time flash

5 time flash

RUN light

1 time flash

2 time flash

5 time flash

1 time flash

6 time flash 6 time flash

RUN light TIMER light Outdoor (LED)

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Item

Model SRK20HD SRC20HD

Cooling capacity(1) W 2000

Heating capacity(1) W 2200

Power source 1 Phase, 220-240V, 50Hz

Cooling input kW 0.635

Running current (Cooling) A 3.1/3.0/2.9

Heating input kW 0.605

Running current (Heating) A 3.0/2.9/2.8

Inrush current A 18

COP Cooling: 3.15 Heating: 3.64

Cooling sound level Hi: 35 , Me: 28 , Lo: 26 45

Noise level Power level dB 53 59

Heating sound level Hi: 35 , Me: 31 , Lo: 27 45

Power level 53 59

Exterior dimensions

Height ×Width ×Depth mm 250 ×815 ×249 540 ×720 ×290

Color Cool white Stucco white

Net weight kg 9.0 32

Refrigerant equipment

Compressor type & Q’ty –RM5485GNE95 (Rotary type) ×1

Motor kW –0.75

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant(3) kg R22 0.77 (Pre-Charged up to the piping length of 7.5m)

Refrigerant oil R0.35 (BARREL FREEZE 32SAM)

Deice control MC control

Air handling equipment

Fan type & Q’ty Tangential fan ×1 Propeller fan ×1

Motor W 14 12

(Cooling) 7.5 26

Air flow (at High) (Heating) CMM 7.5 26

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

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––

Operation control

Operation switch Wireless-Remote controller –

Room temperature control MC. Thermostat –

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

Safety equipment

O.D mm (in) Liquid line: φ6.35 (1/4″) Gas line: φ9.52 (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 mm2×4 cores (Including earth cable)

Connection wiring Connecting method Terminal block (Screw fixing type)

Accessories (included) Mounting kit

Optional parts –

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

2 SELECTION DATA

2.1 Specifications

Model SRK20HD (Indoor unit)

SRC20HD (Outdoor unit)

Item Indoor air temperature Outdoor air temperature Standards

Operation DB WB DB WB

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

Heating 20ºC – 7ºC 6ºC ISO-T1, JIS C9612

(2) The operation data are applied to the 220/230/240V districts respectively.

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

If the piping length is longer, when it is less than 10 m, add 20 g refrigerant per meter and when it is 10 to 15 m, add 30 g refrigerant per meter.

Operation data

(1)

Refrigerant

piping

Frost protection, Serial signal error protection

Fan motor error protection

The piping length is 7.5m.

Compressor overheat protection, Overcurrent pro-

tection, Serial signal error protection

(220/230/240V)

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2.2 Range of usage & limitations

Indoor return air temperature

(Upper, lower limits)

Refrigerant line (one way) length Max. 15m

SRK20HD

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

Model

2.3 Exterior dimensions

(1) Indoor unit

Model SRK20HD

VIEW A

117.5 580 117.5

148.5

216.5

8.2

44.5

236.1

5.7

450

67.5

42.7

47.2

175

44.5

216.5

148.5

53.5

Piping for Gas 397.1 (ø9.52)

Drain hose 540 (ø16)

Piping for Liquid 465.1 (ø6.35)

Piping hole (ø65) Piping hole (ø65)

14.5

788

560

815

250

Unit: mm

Piping hole right(left)

Terminal block

960

249

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(2) Outdoor unit

Model SRC20HD Unit: mm

290540

14.4 47.4 42.6

264.5

404.5

510

720

17.8

Drain holes

39.799.9

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

Outdoor unitIndoor unit

Flare connecting

Room temp.

sensor

Heat

exchanger

Flare connecting

Piping

(Liquid)

ø6.35

Heat

exchanger

sensor

Piping

(Gas)

ø9.52

Service valve

(Gas)

Check joint

4 way valve

Service valve (Liquid)

Strainer

Capillary tube Capillary tubeCapillary tube

Compressor

Accumulator

Discharge temp.

sensor

Heat exchanger

sensor

Heat

exchanger

Outdoor air

temp. sensor

Cooling cycle

Heating cycle

Model SRK20HD

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2.5 Selection chart

Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be

obtained in the following way.

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

(1) Coefficient of cooling and heating capacity in relation to temperatures

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

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

units.

(3) Correction relative to frosting on outdoor heat exchanger during heating

In additions to the foregoing corrections (1), (2) the heating capacity needs to be adjusted also with respect to the frosting on the

outdoor heat exchanger.

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model SRK20HD 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 = 2000 ✕0.975 ✕1.0 =1950 w

SRK20HD Length 15m Factor by air

temperatures

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

0 10-10 -5 5

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.

Heating

Cooling

Applicable range

Coefficient of cooling &

Heating capacity in

relation to temperature

Cooling operation

Outdoor air D.B.

temperature

°C D.B.

Heating operation

Indoor air D.B.

temperature

°C D.B.

Piping length [m]

Cooling

Heating

1.0

0.99

1.0

0.975

1.0

Air inlet temperature of

outdoor unit in ˚CWB

Adjustment coefficient

-10

0.95

-9

0.94

-7

0.93

-5

0.91

-3

0.88

-1

0.86

0.87

0.92

1.00

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3 ELECTRICAL DATA

3.1 Electrical wiring

Model SRK20HD

Power source

1 Phase

220/230/240V 50Hz Outdoor unit

Indoor unit

CNW

HEAT

EXCHANGER

CNM

CNU

CNC

(250V 3.15A)

52C-3

52C

Printed circuit

board

Printed circuit

board

52X1

CFO

52X2

52X3

52X2

52X1

52C-4

ZNR

IC8

2/N

Y/GN

FMo

20S

Y/GN

TB TB

Y/GN

LN J

(250V 3.15A)

ZNR

2 51C

CM1

CM2

Y/GN

D.S

CNB

CNE CNG

Th1 Th2

CNG

Th4

Th5

Th6

CNB

CNU

Display

Wireless

R-Amp

Black

Brown

Red

Light blue

White

Yellow/Green

Y/GN

Color symbol

Meaning of marks

Symbol Parts name

Symbol Parts name Symbol Parts name

CFI

FMI

FMo

Th1

Th2

Th4

Th5

Th6

Capacitor for FMI

Compressor motor

Fuse

Fan motor (Indoor)

Fan motor (Outdoor)

Flap motor

Room temp. sensor

Heat exchanger sensor (Indoor unit)

Heat exchanger sensor (Outdoor unit)

Outdoor air temp. sensor

Discharge temp. sensor

Transformer

ZNR

20S

52C

52X1-3

51C

Varistor

4 way valve (coil)

Magnetic contactor

Diode stack

Auxiliary relay

Motor Protector for CM

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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 indi-

cator 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 indi-

cator 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.

SIndication section

OPERATION MODE indicator

Indicates selected operation with lamp.

[ (Auto) • (Cool) • (Heat) • (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.

Model SRK20HD

Remote controller

SOperation section

4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

4.1 Operation control function by remote control switch

(Air scroll) (Swing)

(Flap stopped)

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Unit indication section

Model SRK20HD

4.2 Unit ON/OFF button

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

the unit on and off.

(a) Operation

Push the button 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, thermal dry or heating modes.

Function Room temperature

Operation mode

setting Fan speed Flap Timer switch

Cooling About 25ºC

Thermal dry About 25ºC Auto Auto Continuous

Heating About 26ºC

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

Unit ON/OFF button

ECONOMY light (orange)

Illuminates during ECONOMY operation.

TIMER light (yellow)

Illuminates during TIMER operation.

HI POWER light (green)

Illuminates during HI POWER operation.

RUN (HOT KEEP) light (green)

•Illuminates during operation.

•Flashes at air flow stop due to the ‘HOT KEEP’.

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