Mitsubishi Heavy Industries SRK20MA-S Bedienungsanleitung

- 1 -

Mitsubishi Heavy Industries Air Conditioners

Technical Manual

Manual Number: 2011 No. W2-01

Variable Frequency Wall Mounted Type

Room Air Conditioners

(Split system, heat pump type)

SRK20MA-S/SRC20MA-S

SRK25MA-S/SRC25MA-S

SRK35MA-S/SRC35MA-S

SRK50MA-S/SRC50MA-S

(R410A Refrigerant Used)

MITSUBISHI HEAVY INDUSTRIES, LTD.

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Table of Contents

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

1.1 Features……………………………………..……………………..…1

1.2 Model identification………………………………………………1

2 MODEL SELECTION…………………………………………………2

2.1 Model function..…………..…….……..………………………..……2

2.2 Range of usage……………………………………………..………6

2.3 Outline drawing……………………………..……………………..…6

2.4 Cooling cycle system diagram…….………………..…………...…8

2.5 Performance curve……………………………………………………9

3 ELECTRICAL WIRING DIAGRAM……………………………….10

4 NAME OF EACH PART AND ITS FUNCTION………….12

4.1 Name of each part………………………….......…………………....15

4.2 Emergency switch………………………….......…………………....15

4.3 Automatic restart……………..…………..………………………..15

4.4 Key lock………….…………..……..……………………………..15

4.5 CLEAN operation………………...……..…………………………..15

4.6 SLEEP operation……..……..…………………………….……..16

4.7 Timing off………...............................................................16

4.8 Timing on ...........................................................................17

4.9 Programmed timer........................................................................17

4.10 Current time setting.....................................................................18

4.11 HI POWER operation....................................................................18

4.12 JET operation.........................................................................18

4.13 POWER SAVE operation.................................................................19

4.14 Air direction adjustment..............................................................19

4.15 Area setting…......................................................................20

4.16 Installation location setting.............................................................20

4.17 Outline of automatic operation..................................................20

- 3 -

4.18 Outline of drying operation..................................................21

4.19 Outline of defrosting operation.................................................21

4.20 Outline of vertical and horizontal flaps control................................23

4.21 Outline of electronic expansion valve (EEV) control.....................24

4.22 Outline of compressor control.........................................24

4.23 Outline of outdoor fan control.........................................24

4.24 Outline of indoor fan control.........................................25

5 INSTALLATION................................................................................27

5.1 Selection of installation location.................................................29

5.2 Installation of indoor unit..................................................................30

5.3 Installation of outdoor unit...............................................................33

5.4 Pipe connection.................................................................................33

5.5 Precautions for wireless remote controller operation.........................35

5.6 Standard running data........................................................................36

6 MAINTENANCE................................................................................37

6.1 Electrical parts failure diagnosis method.....................................37

6.2 Servicing.............................................................................................58

7 SERVICING MANUAL.......................................................................59

8 MOUNT ASSEMBLY…………………………...........................74

8.1 Indoor unit.........................................................................................74

8.2 Outdoor unit......................................................................................90

- 1 -

1 GENERALINFORMATION

1.1 Features

(1) Inverter

● Heating/cooling

The rotate speed of the compressor is changed steplessly in relation to varying load, and is linked

with the fans of indoor and outdoor units controlled by the changes of frequency, thus controls

the power.

● Allowing quick heating/cooling operation during start-up period.

The room temperature is kept constant through fine-tuned control after the machine is stabilized.

(2) Fuzzy control: According to the fuzzy control technology, the indoor temperature and humidity,

etc. are obtained through dynamic analysis to accurately regulate the rotate speeds

of the compressor and the fan to realize precise temperature control.

(3) Comfort: 3D air blowing, sleep mode, and other air blowing modes.

(4) Humanization: Room temperature displaying, key lock, concentrated/area air blowing.

(5) Life: Actual service life: over 20,000 hours; Working life: over 100,000 hours; On/off of relay:

over 50,000 times; Continuous on of LED: over 50,000 hours; On/off of emergency switch:

over 10,000 times.

(4) Self diagnosis function: We will continuously provide the best services for our customers through

devices judging abnormal operation, as follows:

Indoor indication

Error

RUN lamp

TIMER lamp

Temp.

indication

Indoor

unit

Sensors

Indoor heat exchanger sensor error

1 time/8 sec.

Indoor inlet air (room temp.) sensor error

2 times/8 sec.

Others

Indoor fan motor error

6 times/8 sec.

Display communication error

Outdoor unit

Sensors

Outdoor temp. sensor error

Continuous

flashing

1 time/8 sec.

Outdoor heat exchanger (liquid pipe)

sensor error

2 times/8 sec.

Vent-pipe sensor error

4 times/8 sec.

Others

Power cut for current protection

1 time/8 sec.

Failure of outdoor unit

2 times/8 sec.

Current safety

3 times/8 sec.

Failure of power module

4 times/8 sec.

Compressor over heat protection

5 times/8 sec.

Serial signal transmission error

6 times/8 sec.

Outdoor fan motor error

7 times/8 sec.

Cool room high pressure protection

control

Continuous

flashing

Controllable silicon voltage error

5 times/8 sec.

Cooling circulation system protection

7 times/8 sec.

Locked-rotor/rotor lock

2 times/8 sec.

The air conditioner indicates the error of the indoor and outdoor sensors (thermistors) only when it is

in the stop mode. Error indication is removed after restart.

1.2 Model identification

For example:

R410A Refrigerant used

Master pattern change code

Master pattern

Capacity

Wall mounted type (C is the code for outdoor unit.)

Split type room air conditioner

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2 MODEL SELECTION

2.1 Model function

2.1.1 Model: SRK20MA–S (Indoor unit)

SRC20MA–S (Outdoor unit)

Item

Unit

Indoor unit SRK20MA–S

Outdoor unit SRC20MA–S

Net weight

Machine

dimension

798×230×294

780×290×540

Package

dimension

Length×

Width ×Height

850×365×310

920×380×590

Color

White

Ash-colored

Fan

Through-flow type, AS resin +

glass fiber

Axial flow type, AS resin + glass

fiber (embedded damping spindle

sleeve)

Air flow

m3/h

600

1800

Noise in cool

room

dB(A)

Hi/Me/Lo: 37/27/21(completely

mute, SPL)

43(completely mute, SPL)

Noise in warm

room

dB(A)

Hi/Me/Lo: 37/28/24(completely

mute, SPL)

45(completely mute, SPL)

Fan motor

Nominal value

33W, DC motor, insulation grade E

24W, DC motor, insulation grade E

Power of motor

W (reference

value)

Power of electric

control

W (reference

value)

7.5

Power supply and

power cord

Single-phase, 220V, 50Hz and 3-core, 1.0mm2, 250V, 10A, 2m, w/o plug

Heat exchanger

Spiral, hydrophilic, 4-folded,

15-section, 2-row, 528-fin, 1-2

circuit

Spiral, hydrophilic, 20-section,

1-row, 621-fin, 2-1 circuit

Compressor

Nominal value

THACOM RM-B5077MDE2, 527W, DC frequency conversion

compressor, insulation grade E

Refrigerating

machine oil

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

R-410A, 900g, addition/reduction not needed within the use range of 15m

Operating

pressure limit

Mpa

Max.: 4.15, Min.: 1.47

Air filters

Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter

Accessories and

quantity

Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and

installation manual 1, remote controller 1, filter components 2, outdoor unit

1, Drain elbow 1, Water shutoff plug 1

Operation control

devices

Wireless remote controller, electronic thermostat controlling room

temperature, microcomputer controlling defrosting

Safety devices

Serial signal protection, fan error protection, compressor over heat

protection, high voltage protection, over current protection, etc.

* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead

room.

Item

Unit

Rating cooling

Rating heating

Capacity

2000

2700

Power

450

600

Energy efficiency ratio

4.44

4.50

Energy efficiency grade

Grade A (European norm)

Note (1) The data are measured at the following conditions. The pipe length is 5m.

Item

Operation

Indoor air temperature

Outdoor air temperature

Standards

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃

—

2℃

1℃

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

(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.

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

- 3 -

2.1.2 Model: SRK25MA–S (Indoor unit)

SRC25MA–S (Outdoor unit)

Item

Unit

Indoor unit SRK25MA–S

Outdoor unit SRC25MA–S

Net weight

Machine

dimension

798×230×294

780×290×540

Package

dimension

Length×

Width ×Height

850×365×310

920×380×590

Color

White

Ash-colored

Fan

Through-flow type, AS resin +

glass fiber

Axial flow type, AS resin + glass

fiber (embedded damping spindle

sleeve)

Air flow

m3/h

600

1800

Noise in cool

room

dB(A)

Hi/Me/Lo: 37/27/22(completely

mute, SPL)

44(completely mute, SPL)

Noise in warm

room

dB(A)

Hi/Me/Lo: 38/29/23(completely

mute, SPL)

45(completely mute, SPL)

Fan motor

Nominal value

33W, DC motor, insulation grade E

24W, DC motor, insulation grade E

Power of motor

W (reference

value)

Power of electric

control

W (reference

value)

7.5

Power supply and

power cord

Single-phase, 220V, 50Hz and 3-core, 1.0mm2, 250V, 10A, 2m, w/o plug

Heat exchanger

Spiral, hydrophilic, 4-folded,

15-section, 2-row, 528-fin, 1-2

circuit

Spiral, hydrophilic, 20-section,

1-row, 621-fin, 2-1 circuit

Compressor

Nominal value

THACOM RM - B5077MDE2, 527W, DC frequency conversion

compressor, insulation grade E

Refrigerating

machine oil

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

R-410A, 900g, addition/reduction not needed within the use range of 15m

Operating

pressure limit

Mpa

Max.: 4.15, Min.: 1.47

Air filters

Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter

Accessories and

quantity

Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and

installation manual 1, remote controller 1, filter components 2, outdoor unit

1, water elbow 1, Water shutoff plug 1

Operation control

devices

Wireless remote controller, electronic thermostat controlling room

temperature, microcomputer controlling defrosting

Safety devices

Serial signal protection, fan error protection, compressor over heat

protection, high voltage protection, over current protection, etc.

* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead

room.

Item

Unit

Rating cooling

Rating heating

Capacity

2500

3200

Power

680

790

Energy efficiency ratio

3.68

4.05

Energy efficiency grade

Grade A (European norm)

Note (1) The data are measured at the following conditions. The pipe length is 5m.

Item

Operation

Indoor air temperature

Outdoor air temperature

Standards

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃

—

2℃

1℃

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

(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.

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

- 4 -

2.1.2 Model: SRK35MA–S (Indoor unit)

SRC35MA–S (Outdoor unit)

Item

Unit

Indoor unit SRK35MA–S

Outdoor unit SRC35MA–S

Net weight

10.5

Machine

dimension

798×230×294

780×290×540

Package

dimension

Length×

Width ×Height

850×365×310

920×380×590

Color

White

Ash-colored

Fan

Through-flow type, AS resin +

glass fiber

Axial flow type, AS resin + glass

fiber (embedded damping spindle

sleeve)

Air flow

m3/h

600

1870

Noise in cool

room

dB(A)

Hi/Me/Lo: 39/31/23(completely

mute, SPL)

46(completely mute, SPL)

Noise in warm

room

dB(A)

Hi/Me/Lo: 41/34/23(completely

mute, SPL)

50(completely mute, SPL)

Fan motor

Nominal value

33W, DC motor, insulation grade E

24W, DC motor, insulation grade E

Power of motor

W (reference

value)

Power of electric

control

W (reference

value)

7.5

Power supply and

power cord

Single-phase, 220V, 50Hz and 3-core, 1.0mm2, 250V, 10A, 2m, w/o plug

Heat exchanger

Parent: Spiral, hydrophilic,

4-folded, 15-section, 2-row,

528-fin, Pf1.2

Child: Spiral, hydrophilic,

4-section, 1-row, 452-fin, Pf1.4

Spiral, hydrophilic, 20-section,

2-row, 1221-fin, 2-1 circuit, Pf1.4

Compressor

Nominal value

THACOM RM - B5077MDE2, 527W, DC frequency conversion

compressor, insulation grade E

Refrigerating

machine oil

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

R-410A, 900g, addition/reduction not needed within the use range of 15m

Operating

pressure limit

Mpa

Max.: 4.15, Min.: 1.47

Air filters

Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter

Accessories and

quantity

Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and

installation manual 1, remote controller 1, filter components 2, outdoor unit

1, Drain elbow 1, Water shutoff plug 1

Operation control

devices

Wireless remote controller, electronic thermostat controlling room

temperature, microcomputer controlling defrosting

Safety devices

Serial signal protection, fan error protection, compressor over heat

protection, high voltage protection, over current protection, etc.

* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead

room.

Item

Unit

Rating cooling

Rating heating

Capacity

3500

4000

Power

960

1100

Energy efficiency ratio

3.65

3.64

Energy efficiency grade

Grade A (European norm)

Note (1) The data are measured at the following conditions. The pipe length is 5m.

Item

Operation

Indoor air temperature

Outdoor air temperature

Standards

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃

—

2℃

1℃

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

(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.

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

- 5 -

2.1.2 Model: SRK50MA–S (Indoor unit)

SRC50MA–S (Outdoor unit)

Item

Unit

Indoor unit SRK50MA–S

Outdoor unit SRC50MA–S

Net weight

10.5

Machine

dimension

798×230×294

850×290×640

Package

dimension

Length×

Width ×Height

850×365×310

990×395×700

Color

White

Ash-colored

Fan

Through-flow type, AS resin +

glass fiber

Axial flow type, AS resin + glass

fiber (embedded damping spindle

sleeve)

Air flow

m3/h

720

2400

Noise in cool

room

dB(A)

Hi/Me/Lo: 44/34/25(completely

mute, SPL)

50(completely mute, SPL)

Noise in warm

room

dB(A)

Hi/Me/Lo: 48/34/25(completely

mute, SPL)

50(completely mute, SPL)

Fan motor

Nominal value

33W, DC motor, insulation grade E

24W, DC motor, insulation grade E

Power of motor

W (reference

value)

Power of electric

control

W (reference

value)

7.5

Power supply and

power cord

Single-phase, 220V, 50Hz and 3-core, 1.5mm2, 250V, 16A, 2m, w/o plug

Heat exchanger

Parent: Spiral, hydrophilic,

4-folded, 15-section, 2-row,

528-fin, Pf1.2

Child: Spiral, hydrophilic,

4-section, 1-row, 452-fin, Pf1.4

Spiral, hydrophilic, 24-section,

2-row, 1334-fin, 4-1 circuit, Pf1.2

Compressor

Nominal value

THACOM RM - B5077MDE2, 527W, DC frequency conversion

compressor, insulation grade E

Refrigerating

machine oil

300, DIAMOND FREEZE MA68

Refrigerant

controller

Electronic expansion valve (Φ1.5mm) + hush pipe

Refrigerant

R-410A, 1250g, addition/reduction not needed within the use range of 15m

Operating

pressure limit

Mpa

Max.: 4.15, Min.: 1.47

Air filters

Lysozyme filter + Antibacterial deodorizing filter + Mould-proof air filter

Accessories and

quantity

Indoor unit 1, mounting plate 1, tapping screw 5, battery 2, use and

installation manual 1, remote controller 1, filter components 2, outdoor unit

1, Drain elbow 1, Water shutoff plug 1

Operation control

devices

Wireless remote controller, electronic thermostat controlling room

temperature, microcomputer controlling defrosting

Safety devices

Serial signal protection, fan error protection, compressor over heat

protection, high voltage protection, over current protection, etc.

* The nominal values of “Noise in cool room” and “Noise in warm room” in the above table are tested in a dead

room.

Item

Unit

Rating cooling

Rating heating

Capacity

5000

5800

Power

1560

1600

Energy efficiency ratio

3.21

3.63

Energy efficiency grade

Grade A (European norm)

Note (1) The data are measured at the following conditions. The pipe length is 5m.

Item

Operation

Indoor air temperature

Outdoor air temperature

Standards

Cooling

27℃

19℃

35℃

24℃

Heating

20℃

—

7℃

6℃

Low temperature Heating

20℃

—

2℃

1℃

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

(3) The refrigerant quantity to be charged includes the refrigerant in 15m connecting piping.

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

- 6 -

2.2 Range of usage

Please use the air conditioners within the following range of usage, otherwise the protector will be

triggered.

Cooling Operation

Heating Operation

Outdoor temperature

About 18℃~43℃

About -15~24℃

Indoor temperature

About18℃~32℃

About below 30℃

Indoor humidity

About below 80%

20~50 Models

Max. piping one-way length

Within 15 m

Vertical height difference

Within 5 m

Additional R410A Refrigerant

Not required

Voltage

Rating ±10%

Starting voltage

At least 85% of rating

Switching frequency

Max. 10 times per hour

Time interval between stop and start

Min. 3 min

2.3 Outline drawing

(1) Indoor unit: MA-S Series Unit: mm

- 7 -

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