Toshiba MXZ-2DM40VA User manual

HFC

utilized

R410A

NOTE:

RoHS compliant products have <G> mark

on the spec name plate.

PARTS CATALOG (OBB739)

Models

MXZ-2DM40VA -E1 ,ET1 ,ER1

MXZ-3DM50VA -E1 ,ET1 ,ER1

CONTENTS

1. TECHNICAL CHANGES ··································· 2

2. PART NAMES AND FUNCTIONS····················· 3

3. SPECIFICATION················································ 4

4. NOISE CRITERIA CURVES······························ 6

5. OUTLINES AND DIMENSIONS ························ 7

6. WIRING DIAGRAM············································ 9

7. REFRIGERANT SYSTEM DIAGRAM············· 10

8. PERFORMANCE CURVES····························· 13

9. ACTUATOR CONTROL··································· 19

10. SERVICE FUNCTIONS···································· 20

11. TROUBLESHOOTING····································· 24

12. DISASSEMBLY INSTRUCTIONS···················· 50

INDOOR UNITS COMBINATION SHEETS

Indoor unit service manual

MSZ-DM•VA Series (OBH750)

MSZ-HJ•VA Series (OBH647)

MXZ-2DM40VA

SERVICE MANUAL No. OBH739

REVISED EDITION-A

OUTDOOR UNIT

Revision A:

• MXZ-2DM40VA - ER1 and MXZ-

3DM50VA - ER1 have been added.

Please void OBH739.

Prepare the proper tools.

Prepare the proper protectors.

Provide adequate ventilation.

After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.

Discharge the capacitor before the work involving the electric parts.

Do not perform the work involving the electric parts with wet hands.

Do not pour water into the electric parts.

Do not touch the refrigerant.

Do not touch the hot or cold areas in the refrigeration cycle.

When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to

touch the live parts.

Use the speciﬁed refrigerant only

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.

Correct refrigerant is specified in the manuals and on the spec labels provided with our products.

We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by

failure to follow the instructions.

TECHNICAL CHANGES

MXZ-2DM40VA - E1 , ET1 , ER1

MXZ-3DM50VA - E1 , ET1 , ER1

1. New model

Revision A:

• MXZ-2DM40VA - ER1 and MXZ-3DM50VA - ER1 have been added.

OBH739A

PART NAMES AND FUNCTIONS

ACCESSORIES

MXZ-2DM40VA

Air inlet

Air outlet

Drain outlet

Piping

Drain hose

(Back and side)

Model MXZ-2DM40VA MXZ-3DM50VA

Drain socket 1 1

Drain cap 2

Air outlet

Drain outlet

Air inlet

(Back and side)

MXZ-3DM50VA

OBH739A

SPECIFICATION

Outdoor model MXZ-2DM40VA

Outdoor unit power supply Single phase

230 V, 50 Hz

System

Indoor units number 2

Piping total length m Max. 30

Connecting pipe length m Max. 20

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.) 2 kW 4.0 (1.1 - 4.3) 4.3 (1.0 - 4.7)

Breaker capacity A 15

Electrical

data

Power input (Total) 1, 2 W 1,050 1,160

Running current (Total) 1, 2 A 5.1 5.6

Power factor (Total) 1, 2% 90

Starting current (Total) 1, 2 A 5.6

Coefﬁcient of performance (C.O.P) (Total) 1, 2 3.81 3.71

Compressor

Model KNB092FFDHC

Output W 1,100

Current 1, 2 A 4.7 5.2

Refrigeration oil (Model) L 0.32 (NEO22)

Fan

motor

Model RC0J50-FA

Current 1, 2 A 0.19 0.23

Dimensions W x H x D mm 800 x 550 x 285

Weight kg 32

Special

remarks

Air ﬂow (Rated) m3/h 1,752 1,914

Sound level (Rated) dB(A) 48 52

Fan speed (Rated) rpm 840 910

Refrigerant ﬁlling capacity (R410A) kg 0.95

1 Measured under rated operating frequency.

2 When connected with below indoor units.

MSZ-DM25VA + MSZ-DM25VA

NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)

COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C

OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C

HEATING INDOOR Dry-bulb temperature 20.0 °C

OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH739A

Outdoor model MXZ-3DM50VA

Outdoor unit power supply Single phase

230 V, 50 Hz

System

Indoor units number 2 to 3

Piping total length m Max. 50

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.) 2 kW 5.0 (2.7 - 6.5) 6.0 (2.4 - 7.5)

Breaker capacity A 25

Electrical

data

Power input (Total) 1, 2 W 1,130 1,310

Running current (Total) 1, 2 A 5.0 5.8

Power factor (Total) 1, 2% 99

Starting current (Total) 1, 2 A 5.8

Coefﬁcient of performance (C.O.P) (Total) 1, 2 4.42 4.58

Compressor

Model SNB130FGBH1T

Output W 1,300

Current 1, 2 A 4.5 5.3

Refrigeration oil (Model) L 0.7 (NEO22)

Fan

motor

Model SIC-71FW-F764-1

Current 1, 2 A 0.20 0.23

Dimensions W x H x D mm 840 x 710 x 330

Weight kg 57

Special

remarks

Air ﬂow (Rated) m3/h 2,252 2,379

Sound level (Rated) dB(A) 50 53

Fan speed (Rated) rpm 630 660

Refrigerant ﬁlling capacity (R410A) kg 2.7

1 Measured under rated operating frequency.

2 When connected with below indoor units.

MSZ-DM25VA + MSZ-DM25VA + MSZ-DM25VA

NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)

COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C

OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C

HEATING INDOOR Dry-bulb temperature 20.0 °C

OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH739A

10 63 125 250 500 1000 2000 4000 8000

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

NOISE CRITERIA CURVES

MXZ-2DM40VA

10 63 125 250 500 1000 2000 4000 8000

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

MXZ-3DM50VA

OUTDOOR UNIT

MICROPHONE

Test conditions

Cooling :Dry-bulb temperature 35°C Wet-bulb temperature 24°C

Heating :Dry-bulb temperature 7°C Wet-bulb temperature 6°C

OBH739A

OUTLINES AND DIMENSIONS

MXZ-2DM40VA

Unit: mm

OBH739A

1.Installation space

Note : Leave front and both sides

free of obstruction.

Note : Leave rear, overhead and

both sides free of obstruction.

500 or more

100 or more

Note : Leave front and overhead

free of obstruction.

100 or more 350 or more

200 or more

500 or more

2.Service space

100 or more

500 or more

350 or more

100 or more Service space

Liquid pipe : Ø6.35(flared)1/4 C unit connection

B unit connection

A unit connection

Gas pipe : Ø9.52(flared)3/8

Liquid pipe : Ø6.35(flared)1/4

Gas pipe : Ø9.52(flared)3/8

Liquid pipe : Ø6.35(flared)1/4

Gas pipe : Ø9.52(flared)3/8

MXZ-3DM50VA

Unit: mm

OBH739A

WIRING DIAGRAM

MXZ-2DM40VA - E1 , ET1 , ER1

21S4

NAME

t°

12-24V

~ 230V

12-24V

~ 230V

ACL, ACL2

C61~63

DB61

F701, 801, 901

IC700, 820, 932

IC802

LED1, 2

SYMBOL

NOTES:

RT68

TB1~3

T801

X63, 64, 66

21S4

SYMBOLNAME

LEV A, B

PTC64, 65

RT61

RT62

RT64

RT65

SYMBOLNAME

:Terminal block

1.About the indoor side electric wiring refer to the

indoor unit electric wiring diagram for servicing.

2.Use copper conductors only.

(For field wiring).

3.Symbols below indicate.

:Connector

t°t°

LEV A

X64

PTC64

1CN644

CN641

RT68RT62

t° RT61

CN935 7

CN725

LEV B

F701

LD61

61CN724 6

PTC65

X63

CN721 2

X66

CN722

TO INDOOR

UNIT No. B

TO INDOOR

UNIT No. A

POWER SUPPLY

~/N

230V 50Hz

BLK

BLU

BLK

BLU

RED

ORN

ACL2

TB3

TB2

BLK

BLU

BREAKER

CIRCUIT

GRN/YLW TB1

LD66B

LD62

CN602

CN601

LD-E1

LD-E2

BLK

BLU

BLK

BRN

BLK

BLU

RED

ORN

LED1 LED2

CN936

OUTDOOR

DISPLAY

P.C. BOARD

WVU

RED WHT

F901

T801

F801 IC802

C62

C61C63

ACL

CN642

BRNORN

1CN931

1CN643

RT65RT64

INVERTER P.C. BOARD

IC700

CNMC

IC932

DB61

IC820

CN932

LD66A

LD70

LDW

LDV

LDU

RED

BLK

WHT

RED

BLK WHT

BLK

REACTOR

SMOOTHING CAPACITOR

DIODE MODULE

FUSE (T3.15AL250V)

POWER MODULE

POWER DEVICE

LED

EXPANSION VALVE COIL

COMPRESSOR

FAN MOTOR

CIRCUIT PROTECTOR

DEFROST THERMISTOR

DISCHARGE TEMP. THERMISTOR

FIN TEMP. THERMISTOR

AMBIENT TEMP. THERMISTOR

OUTDOOR HEAT EXCHANGER

TEMP. THERMISTOR

TERMINAL BLOCK

SWITCHING TRANS

RELAY

REVERSING VALVE COIL

MXZ-3DM50VA - E1 , ET1 , ER1

X712 X714

OUTDOOR

POWER P.C.

BOARD

CB1

CB2

CB3

BLK

CN661

CN665

RT65

t°

RT62

t°

RT68RT61

t°t°

(WHT) (WHT)(RED) CN791CN793

(BLU) CN792

LEV C

LEV B

LEV A

CN621

CN611

CN601

YLW

ORN

BLK

BLU

RED

TO INDOOR

UNIT No.C S3

NYLW

BLU

BLK

TO INDOOR

UNIT No.B S3

NBLU

ORN

BLK

TO INDOOR

UNIT No.A

BLK

RED

BLU

BLK

BLU

TB2

TB3

TB4

BLK

F66

CN3

F930

5MS

CN7

CN904

F711

CN712

12 CN714

CN62 31

CN711

12-24V

LED1

IC801

~ 230V

HPS

CN681

CN5

CN931

CN702

CN795

CN2

CN701 1

CN801

CN9

LD9

F801

CN4

IPM

LED2

T801

PFC

LED3

LD2

t°

7 LD1

LDE1

CN903

TAB4

X64

CN61

CN901

F64

POWER SUPPLY

~/N 230V 50Hz BLK

WHT

RED

YLW

BLK

RED

WHT

21S4

BLK

RT64

LEV E

BLK

WHT

RED

BLK

BLU

CIRCUIT

BREAKER TB1

TAB2

TAB1

F65

GRN/YLW

NOISE FILTER P.C.BOARD

OUTDOOR CONTROL P.C.BOARD

PTC65

PTC64

RELAY

REVERSING VALVE SOLENOID COIL

X712,714

21S4

SYMBOL SYMBOL SYMBOL SYMBOL

SYMBOL

NAME

NAMENAMENAMENAME

CB1~3

F64

F65, 66

F711, 801,

930

HPS

SMOOTHING CAPACITOR

FUSE (T2AL250V)

FUSE (T6.3AL250V)

FUSE (T3.15AL250V)

HIGH PRESSURE SWITCH

RT64

RT65

RT68

T801

TB1~4

X64

FIN TEMP. THERMISTOR

AMBIENT TEMP. THERMISTOR

OUTDOOR HEAT EXCHANGER TEMP. THERMISTOR

TRANSFORMER

TERMINAL BLOCK

RELAY

PFC

PTC64, 65

RT61

RT62

COMPRESSOR

FAN MOTOR

POWER FACTOR CONTROLLER

CIRCUIT PROTECTION

DEFROST THERMISTOR

DISCHARGE TEMP. THERMISTOR

IC801

IPM

LED1, 2, 3

LEV A~C

LEV E

POWER DEVICE

POWER MODULE

REACTOR

LED

EXPANSION VALVE COIL

NOTES:1. About the indoor side electric wiring refer to

the indoor unit electric wiring diagram for servicing.

2. Use copper conductors only (For field wiring).

3. Symbols below indicate.

:Terminal block :Connector

OBH739A

UNIT: mm (inch)

MXZ-2DM40VA

Outdoor

unit

Indoor

units

15 m

10 m

15 m

Max.

Height

difference

Outdoor unit union diameter

For

Indoor unit A Liquid 6.35(1/4)

Gas 9.52(3/8)

Indoor unit B Liquid 6.35(1/4)

Gas 9.52(3/8)

Stop valve

(with strainer #100) LEV A

LEV B

Compressor

Muffler

4-way valve

Indoor unit

Capillary tube

Stop valve

(with strainer #100)

Refrigerant flow in cooling

Refrigerant flow in heating

Discharge

temperature

thermistor RT62

Stop valve

(with service port)

Stop valve

(with service port)

Strainer

#100

Sub muffler

Defrost

thermistor

RT61

Ambient

temperature

thermistor

RT65

Outdoor heat

exchanger

temperature

thermistor

RT68 FAN-OUT

HEX-OUT

UNIT: mm

REFRIGERANT SYSTEM DIAGRAM

MAX REFRIGERANT PIPING LENGTH

Piping length each indoor unit (a, b) 20 m

Total piping length (a+b) 30 m

Bending point for each unit 20

Total bending point 30

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

Outdoor unit

precharged

(g)

Refrigerant piping length (one way, 2 unit total)

20 m 30 m

950 0 200

Calculation: Xg = 20 g/m x (Refrigerant piping length (m) - 20)

Refrigerant pipe diameter is different according to indoor unit to be

connected. When using extension pipes, refer to the right table.

When diameter of refrigerant pipe is different from that of outdoor

unit union, use optional Different-diameter pipe.

For further information on Different-diameter pipe, refer to "PARTS

CATALOG".

OBH739A

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