Mitsubishi Heavy Industries SRK20HG Bedienungsanleitung

WALL MOUNTED TYPE

ROOM AIR-CONDITIONER

TECHNICAL MANUAL

Collection data

Manual No. ’07

SRK-T

064

(Split system, air to air heat pump type)

SRK20HG

SRK28HG

SRK40HG

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 .................................................................. 5

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

2.4 Piping system ........................................................................................... 7

2.5 Selection chart .......................................................................................... 8

3. ELECTRICAL DATA ........................................................................................ 9

3.1 Electrical wiring ........................................................................................ 9

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

4.1 Operation control function by remote control switch ........................... 11

4.2 Unit ON/OFF button .................................................................................. 12

4.3 Power blackout auto restart function ..................................................... 12

4.4 Custom cord switching procedure ......................................................... 13

4.5 Flap control ............................................................................................... 13

4.6 Timer operation ......................................................................................... 14

4.7 Outline of heating operation .................................................................... 15

4.8 Outline of cooling operation .................................................................... 18

4.9 Outline of dehumidifying operation ........................................................ 19

4.10 Outline of automatic operation................................................................ 20

4.11 Outline of clean operation ....................................................................... 20

4.12 Protective control function ...................................................................... 21

5. APPLICATION DATA ....................................................................................... 23

5.1 Selection of location for installation ....................................................... 24

5.2 Installation of indoor unit......................................................................... 25

5.3 Installation of outdoor unit ...................................................................... 28

5.4 Connection of refrigerant piping ............................................................. 28

5.5 Test run ...................................................................................................... 30

5.6 Precautions for wireless remote control installation and

operation ................................................................................................... 30

6. MAINTENANCE DATA .................................................................................... 31

6.1 Trouble shooting....................................................................................... 31

6.2 Servicing.................................................................................................... 36

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 or

heating 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 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 G

Room temperature sensor error

Indoor fan motor error

Heat exchanger sensor error

2 time flash

6 time flash

TIMER light

1 time flash

RUN light

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

TIMER light Outdoor (LED)

Error of signal transmission

Trouble of outdoor unit

Over heat of compressor

2 time flash

5 time flash

RUN light

2 time flash

5 time flash

6 time flash 6 time flash

Item

Model SRK20HG SRC20HG

Cooling capacity(1) W 2070

Heating capacity(1) W 2360

Power source 1 Phase, 220/230/240V, 50Hz

Cooling input kW 0.655

Running current (Cooling) A 2.9/3.1/3.3

Heating input kW 0.64

Running current (Heating) A 2.9/3.1/3.3

Inrush current A 15.5

COP Cooling: 3.16 Heating: 3.69

Cooling Sound level Hi: 35 , Me: 28 , Lo: 26 44

Noise level Power level dB 53 59

Heating Sound level Hi: 34 , Me: 31 , Lo: 27 45

Power level 53 59

Exterior dimensions

Height ×Width ×Depth mm 268 ×790 ×199 540 ×780 ×290

Color Fine snow Stucco white

Net weight kg 8.5 28

Refrigerant equipment

Compressor type & Q’ty –2RS127D5AA04 (Rotary type) ×1

Motor kW –0.6

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant(3) kg R22 0.73 (Pre-Charged up to the piping length of 7m)

Refrigerant oil R0.29 (ATMOS NM56M or SUNISO 4GDID)

Deice control Microcomputer control

Air handling equipment

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

Motor W 14 14

(Cooling) 7.5 27

Air flow (at High) (Heating) CMM 7.5 27

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

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––

Operation control

Operation switch Wireless-Remote control –

Room temperature control Microcomputer 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 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)

Optional parts –

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

2 SELECTION DATA

2.1 Specifications

Model SRK20HG (Indoor unit)

SRC20HG (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 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 m.

Compressor overheat protection, High pressure

control, Serial signal error protection

(220/230/240V)

Model SRK28HG (Indoor unit)

SRC28HG (Outdoor unit)

Item

Model SRK28HG SRC28HG

Cooling capacity(1) W 2530

Heating capacity(1) W 2670

Power source 1 Phase, 220/230/240V, 50Hz

Cooling input kW 0.77

Running current (Cooling) A 3.6/3.4/3.2

Heating input kW 0.685

Running current (Heating) A 3.2/3.0/2.8

Inrush current A 16.4

COP Cooling: 3.29 Heating: 3.90

Cooling Sound level Hi: 39, Me: 33, Lo: 30 45

Noise level Power level dB 55 60

Heating Sound level Hi: 39, Me: 33, Lo: 29 44

Power level 56 60

Exterior dimensions

Height ×Width ×Depth mm 268 ×790 ×199 540 ×780 ×290

Color Fine snow Stucco white

Net weight kg 8.5 31

Refrigerant equipment

Compressor type & Q’ty –2PS146D5BC04 (Rotary type) ×1

Motor kW –0.7

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant(3) kg R22 0.89 (Pre-Charged up to the piping length of 7m)

Refrigerant oil R0.32 (ATMOS NM56M or SUNISO 4GDID)

Deice control Microcomputer control

Air handling equipment

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

Motor W 14 15

(Cooling) 8.5 29

Air flow (at High) (Heating) CMM 9.5 29

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

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––

Operation control

Operation switch Wireless-Remote control –

Room temperature control Microcomputer 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 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)

Optional parts –

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

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 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 m.

Compressor overheat protection, High pressure

control, Serial signal error protection

(220/230/240V)

Model SRK40HG (Indoor unit)

SRC40HG (Outdoor unit)

Item

Model SRK40HG SRC40HG

Cooling capacity(1) W 3500

Heating capacity(1) W 3700

Power source 1 Phase, 220/230/240V, 50Hz

Cooling input kW 1.09

Running current (Cooling) A 5.0/4.8/4.6

Heating input kW 1.09

Running current (Heating) A 5.0/4.8/4.6

Inrush current A 27.0

COP Cooling: 3.21 Heating: 3.39

Cooling Sound level Hi: 40, Me: 38, Lo: 34 48

Noise level Power level dB 56 63

Heating Sound level Hi: 40, Me: 38, Lo: 34 50

Power level 57 64

Exterior dimensions

Height ×Width ×Depth mm 268 ×790 ×199 540 ×780 ×290

Color Fine snow Stucco white

Net weight kg 8.5 38

Refrigerant equipment

Compressor type & Q’ty –2KS206D3AC04 (Rotary type) ×1

Motor kW –0.95

Starting method – Line starting

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

Refrigerant control Capillary tubes

Refrigerant(3) kg R22 1.1 (Pre-Charged up to the piping length of 7m)

Refrigerant oil R0.41 (ATMOS NM56M or SUNISO 4GDID)

Deice control Microcomputer control

Air handling equipment

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

Motor W 14 22

(Cooling) 9.0 32

Air flow (at High) (Heating) CMM 10.0 32

Air filter, Q’ty

Polypropylene net (washable)

–

Shock & vibration absorber – Cushion rubber (for compressor)

Electric heater ––

Operation control

Operation switch Wireless-Remote control –

Room temperature control Microcomputer 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: φ12.7 (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 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, Clean filter (Natural enzyme filter ×1, Photocatalytic washable deodorizing filter ×1)

Optional parts –

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

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 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

The piping length is 7 m.

Frost protection, Serial signal error protection

Fan motor error protection

Compressor overheat protection, High pressure

control, Serial signal error protection

(220/230/240V)

2.2 Range of usage & limitations

Indoor return air temperature

(Upper, lower limits)

Refrigerant line (one way) length Max. 15m

All models

Power source voltage Rating ±10%

Voltage at starting Min. 85% of rating

Frequency of ON-OFF cycle

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

Max. 10 times/h

(Inching prevention 3 minutes)

Cooling operation : Approximately 21 to 32˚C

Heating operation : Approximately 15 to 30˚C

Cooling operation : Approximately 21 to 43˚C

Heating operation : Approximately -5 to 21˚C

2.3 Exterior dimensions

(1) Indoor unit

Models All models

Piping hole (ø65)

( )

Piping hole (ø65)

53.5

380.6

Pipng for Liquid 448.6 (ø6.35)

20, 28 : ø9.52

40 : 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

17.5 60 27

788

199 3

Terminal block

Piping hole right(left)

268

790

VIEW A

Unit: mm

(2) Outdoor unit

Models All models

2-16×12

Drain holes (ø20)

138.4

40˚

61.9

18.9165.1510104.9

439.1

111.4

99.4

349.5

313.1

43.1

290

350

23.5312.5

33.5

40˚

42.595.9

540

780

Service valve (Liquid)

Flare connection ø6.35 (1/4'')

Service valve (Gas)

Flare connection

20, 28: ø9.52 (3/8'')

40: ø12.7 (1/2'')

Terminal block

2.4 Piping system

Model SRK40HG

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

Muffler

Heat exchanger

sensor

Heat

exchanger

Outdoor air

temp. sensor

Cooling cycle

Heating cycle

Models SRK20HG, 28HG

Outdoor unitIndoor unit

Flare connecting

Room temp.

sensor

Heat

exchanger

Flare connecting

Piping

(Liquid)

ø6.35

Heat

exchanger

sensor

Piping

(Gas)

ø12.7

Service valve

(Gas)

Check joint

4 way valve

Service valve (Liquid)

Strainer

Capillary tube

Compressor

Accumulator

Discharge temp.

sensor

Heat exchanger

sensor

Heat

exchanger

Outdoor air

temp. sensor

Cooling cycle

Heating cycle

Check valve

Muffler

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 SRK20HG 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 = 2070 ✕0.975 ✕1.0 =2018 W

SRK20HG Length 15m Factor by air

temperatures

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

1005-5

16 18 20 22 24

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

Heating

Applicable range

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

Cooling

Heating operation

Indoor air D.B.

temperature

˚C D.B.

Cooling operation

Outdoor air D.B.

temperature

˚C D.B.

Coefficient of cooling &

Heating capacity in

relation to temperature

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

-5

0.91

-3

0.88

-1

0.86

0.87

0.92

1.00

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