Mitsubishi Electric Mr. Slim MXZ-2B20NA Manuale utente

Models

SERVICE MANUAL

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES ······························ 8

5. OUTLINES AND DIMENSIONS ························ 9

6. WIRING DIAGRAM·········································· 12

7. REFRIGERANT SYSTEM DIAGRAM ············· 15

8. DATA································································ 21

9. ACTUATOR CONTROL··································· 39

10. SERVICE FUNCTIONS···································· 39

11. TROUBLESHOOTING ····································· 41

12. DISASSEMBLY INSTRUCTIONS···················· 59

INDOOR UNITS COMBINATION SHEETS

No. OBH560

REVISED EDITION-D

The Slim Line.

From Mitsubishi Electric.

OUTDOOR UNIT

MXZ-2B20NA, - 1

MXZ-3B24NA, - 1

MXZ-3B30NA, - 1

MXZ-4B36NA, - 1

MXZ-2B20NA

Indoor unit service manual

MSZ-A·NA Series (OB450)

MSZ-FD·NA Series (OBH497)

MSZ-FE·NA Series (OBH542)

MSZ-GE·NA Series (OBH548)

MFZ-KA·NA Series(OBH568)

SEZ-KD·NA.TH Series

SPLIT-TYPE AIR CONDITIONERS

HFC

utilized

R410A

33223

9700058

Revision D:

•

MXZ-3B24NA-

, MXZ-3B30NA-

,and MXZ-

4B36NA-

have been added.

Please void OBH560

REVISED EDITION-C.

PARTS CATALOG (OBB560)

TECHNICAL CHANGES

Revision B:

• MXZ-3B24NA and MXZ-4B36NA have been added.

MXZ-2B20NA

New model

MXZ-2B20NA MXZ-2B20NA - 1

1. Outdoor fan motor has been changed.

2. Outdoor electronic control P.C. board has been changed.

3. LEV coil has been changed.

MXZ-3B24NA

New model

MXZ-3B30NA

New model

MXZ-3B24NA MXZ-3B24NA - 1

1. Outdoor fan motor has been changed.

2. Outdoor electronic control P.C. board has been changed.

MXZ-3B30NA MXZ-3B30NA - 1

1. Outdoor fan motor has been changed.

2. Outdoor electronic control P.C. board has been changed.

MXZ-4B36NA MXZ-4B36NA - 1

1. Outdoor fan motor has been changed.

2. Outdoor electronic control P.C. board has been changed.

Revision A:

• MXZ-2B20NA- 1 has been added.

Revision C:

• MXZ-3B30NA has been added.

Revision D:

• MXZ-3B24NA- 1, MXZ-3B30NA- 1, and MXZ-4B36NA- 1have been added.

PART NAMES AND FUNCTIONS

MXZ-2B20NA

Air outlet

Drain outlet

Air inlet

(Back and side)

MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA

Air outlet

Drain outlet

Air inlet

(Back and side)

SPECIFICATION

Item

Outdoor model

Indoor type Non-Duct (09+09) Duct (09+12)

Capacity

Power

consumption

EER

SEER

HSPF IV (V)

COP

External finish

Power supply

Max. fuse size (time delay)

Min. circuit ampacity

Fan motor

Compressor

Refrigerant control

Sound level

Defrost method

Dimensions

Weight

Remote controller

Control voltage (by built-in transformer)

Refrigerant piping

Valve size

Connection method

Refrigerant charge (R410A)

Refrigeration oil (Model)

Model

Winding resistance (at 68°F) Ω

Liquid

Gas

Indoor

Outdoor

Btu/h

V, phase, Hz

F.L.A

R.L.A

L.R.A

dB(A)

in.

lb.

in.

lb.

oz.

Cooling

Heating 47

Heating 17

Cooling

Heating 47

Heating 17

Cooling

Heating

MXZ-2B20NA, -

Munsell 3.0Y 7.8/1.1

208/230, 1, 60

0.96

SNB130FQBH1

U-V 0.98 V-W 0.98 W-U 0.98

10.1

LEV

49/51

Reverse cycle

33-1/16

27-15/16

130

Wireless type

12-24 V DC

Not supplied (optional parts)

1/4

A,B: 3/8

Flared

5 lb. 15 oz.

23.7 (NEO22)

18,000

22,000

14,500

1,440

1,650

1,500

12.50

18.0

8.9 (7.0)

3.91

20,000

22,000

12,500

2,190

1,780

1,430

9.10

15.5

8.5 (6.9)

3.62

Cooling

Heating

Mode

1: "A" Cooling steady state at rated compressor speed

"B-2" Cooling steady state at rated compressor speed

"B-1" Cooling steady state at minimum compressor speed

Low ambient cooling steady state at minimum compressor speed

Intermediate cooling steady state at intermediate compressor speed

1: Standard rating-heating at rated compressor speed

2: Low temperature heating at maximum compressor speed

Maximum temperature heating at minimum compressor speed

High temperature heating at minimum compressor speed

Frost accumulation at rated compressor speed

Frost accumulation at intermediate compressor speed

Test Indoor air condition Outdoor air condition

Dry bulb Wet bulb Dry bulb Wet bulb

(75)

(65)

(53.5)

(69)

56.5

Unit: °F

NOTE : Test conditions are based on ARI 210/240.

Item

Outdoor model

Indoor type Non-Duct (06+06+09)

MXZ-3B24NA

MXZ-3B24NA -

Duct (09+09+09)

Capacity

Power

consumption

EER

SEER

HSPF IV (V)

COP

External finish

Power supply

Max. fuse size (time delay)

Min. circuit ampacity

Fan motor

Compressor

Refrigerant control

Sound level

Defrost method

Dimensions

Weight

Remote controller

Control voltage (by built-in transformer)

Refrigerant piping

Valve size

Connection method

Refrigerant charge (R410A)

Refrigeration oil (Model)

Model

Winding resistance (at 68°F) Ω

Liquid

Gas

Indoor

Outdoor

Btu/h

V, phase, Hz

F.L.A

R.L.A

L.R.A

dB(A)

in.

lb.

in.

lb.

oz.

22,000

25,000

18,800

1,760

1,750

2,120

12.50

17.5

9.3 (7.0)

4.20

23,600

24,600

17,000

2,460

1,900

2,230

9.60

15.0

8.5 (6.9)

3.80

Munsell 3.0Y 7.8/1.1

208/230, 1, 60

0.93

TNB220FMCH

U-V 0.61 V-W 0.61 W-U 0.61

LEV

54/49

Reverse cycle

35-7/16

12-19/32

35-7/16

150

Wireless type

12-24 V DC

Not supplied (optional parts)

1/4

A: 1/2 B,C: 3/8

Flared

7 lb. 11 oz.

29.4 (NEO22)

Cooling

Heating 47

Heating 17

Cooling

Heating 47

Heating 17

Cooling

Heating

MXZ-3B24NA, -

Cooling

Heating

Mode

1: "A" Cooling steady state at rated compressor speed

"B-2" Cooling steady state at rated compressor speed

"B-1" Cooling steady state at minimum compressor speed

Low ambient cooling steady state at minimum compressor speed

Intermediate cooling steady state at intermediate compressor speed

1: Standard rating-heating at rated compressor speed

2: Low temperature heating at maximum compressor speed

Maximum temperature heating at minimum compressor speed

High temperature heating at minimum compressor speed

Frost accumulation at rated compressor speed

Frost accumulation at intermediate compressor speed

Test Indoor air condition Outdoor air condition

Dry bulb Wet bulb Dry bulb Wet bulb

(75)

(65)

(53.5)

(69)

56.5

Unit: °F

NOTE : Test conditions are based on ARI 210/240.

Item

Outdoor model

Indoor type Non-Duct (09+09+12)

MXZ-3B30NA

MXZ-3B30NA -

Duct (09+09+12)

Capacity

Power

consumption

EER

SEER

HSPF IV (V)

COP

External finish

Power supply

Max. fuse size (time delay)

Min. circuit ampacity

Fan motor

Compressor

Refrigerant control

Sound level

Defrost method

Dimensions

Weight

Remote controller

Control voltage (by built-in transformer)

Refrigerant piping

Valve size

Connection method

Refrigerant charge (R410A)

Refrigeration oil (Model)

Model

Winding resistance (at 68°F) Ω

Liquid

Gas

Indoor

Outdoor

Btu/h

V, phase, Hz

F.L.A

R.L.A

L.R.A

dB(A)

in.

lb.

in.

lb.

oz.

28,400

28,600

18,800

3,120

2,150

2,120

9.10

17.5

10.5 (7.2)

3.90

27,400

27,600

18,000

3,330

2,220

2,140

8.23

14.5

9.5 (7.0)

3.64

Munsell 3.0Y 7.8/1.1

208/230, 1, 60

0.93

TNB220FMCH

U-V 0.61 V-W 0.61 W-U 0.61

LEV

49/49

Reverse cycle

35-7/16

12-19/32

35-7/16

150

Wireless type

12-24 V DC

Not supplied (optional parts)

1/4

A: 1/2 B,C: 3/8

Flared

7 lb. 11 oz.

29.4 (NEO22)

Cooling

Heating 47

Heating 17

Cooling

Heating 47

Heating 17

Cooling

Heating

MXZ-3B30NA, -

Cooling

Heating

Mode

1: "A" Cooling steady state at rated compressor speed

"B-2" Cooling steady state at rated compressor speed

"B-1" Cooling steady state at minimum compressor speed

Low ambient cooling steady state at minimum compressor speed

Intermediate cooling steady state at intermediate compressor speed

1: Standard rating-heating at rated compressor speed

2: Low temperature heating at maximum compressor speed

Maximum temperature heating at minimum compressor speed

High temperature heating at minimum compressor speed

Frost accumulation at rated compressor speed

Frost accumulation at intermediate compressor speed

Test Indoor air condition Outdoor air condition

Dry bulb Wet bulb Dry bulb Wet bulb

(75)

(65)

(53.5)

(69)

56.5

Unit: °F

NOTE : Test conditions are based on ARI 210/240.

Item

Outdoor model

Indoor type Non-Duct (09+09+09+09)

MXZ-4B36NA

MXZ-4B36NA -

Duct (09+09+09+09)

Capacity

Power

consumption

EER

SEER

HSPF IV (V)

COP

External finish

Power supply

Max. fuse size (time delay)

Min. circuit ampacity

Fan motor

Compressor

Refrigerant control

Sound level

Defrost method

Dimensions

Weight

Remote controller

Control voltage (by built-in transformer)

Refrigerant piping

Valve size

Connection method

Refrigerant charge (R410A)

Refrigeration oil (Model)

Model

Winding resistance (at 68°F) Ω

Liquid

Gas

Indoor

Outdoor

Btu/h

V, phase, Hz

F.L.A

R.L.A

L.R.A

dB(A)

in.

lb.

in.

lb.

oz.

35,400

36,000

24,600

3,760

3,020

3,340

9.40

18.0

9.3 (7.2)

3.50

34,400

25,400

3,940

3,100

3,450

8.70

15.0

9.0(7.0)

3.25

Munsell 3.0Y 7.8/1.1

208/230, 1, 60

0.93

TNB220FMCH

U-V 0.61 V-W 0.61 W-U 0.61

14.4

LEV

54/57

Reverse cycle

35-7/16

12-19/32

35-7/16

153

Wireless type

12-24 V DC

Not supplied (optional parts)

1/4

A: 1/2 B,C,D: 3/8

Flared

8 lb. 13 oz.

29.4 (NEO22)

Cooling

Heating 47

Heating 17

Cooling

Heating 47

Heating 17

Cooling

Heating

MXZ-4B36NA, -

MXZ-4B36NA

MXZ-4B36NA -

208 V

230 V

208 V

230 V

208 V

230 V

208 V

230 V

Cooling

Heating

Mode

1: "A" Cooling steady state at rated compressor speed

"B-2" Cooling steady state at rated compressor speed

"B-1" Cooling steady state at minimum compressor speed

Low ambient cooling steady state at minimum compressor speed

Intermediate cooling steady state at intermediate compressor speed

1: Standard rating-heating at rated compressor speed

2: Low temperature heating at maximum compressor speed

Maximum temperature heating at minimum compressor speed

High temperature heating at minimum compressor speed

Frost accumulation at rated compressor speed

Frost accumulation at intermediate compressor speed

Test Indoor air condition Outdoor air condition

Dry bulb Wet bulb Dry bulb Wet bulb

(75)

(65)

(53.5)

(69)

56.5

Unit: °F

NOTE : Test conditions are based on ARI 210/240.

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, 0dB = 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

NOISE CRITERIA CURVES

MXZ-2B20NA

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, 0dB = 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

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, 0dB = 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

MXZ-4B36NA

MXZ-3B24NA

MXZ-3B30NA

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, 0dB = 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

OUTLINES AND DIMENSIONS

MXZ-2B20NA Unit: inch

Lock nut Connector

Grounding terminal

Conduit

cover

Note : Leave front and both sides

free of obstruction.

Note : Leave front and overhead

free of obstruction.

Note : Leave rear, overhead and both sides

free of obstruction.

1.Installation space

2.Service space

MXZ-3B24NA

MXZ-3B30NA

Unit: inch

15/16" 7/16"

5/8" 5/8"

1-1/16"

1-9/16"

14"

15-1/4"

10-5/8"

9-27/32"

1-3/8"

19-11/16" 7-7/8"

7-7/8"

2-29/32"

1-3/8"

(Bolt pitch)

Air in

Air out

Air in

2-(15/32" x 1-13/32") Oval hole

2-U Shaped notched hole

(Base bolt M10)

3- 7/8"Punched hole

(Connect wiring hole)

35-7/16"

(Connect wiring hole)

2- 7/8"Knockout

Handle

8-27/32"

1-25/32"

19-1/8"

12-1/2"

18-1/8"

29/32"

13/32"12-19/32"1-3/16"

3-15/32"

Gas pipe

3/8 (B,C unit)

1/2 (A unit)

More than 3-15/16"

More than 19-11/16"

More than 7-7/8"

More than13-25/32"

More than 3-15/16"

More than 19-11/16"

More than 13-25/32"

More than 3-15/16"

SERVICE SPACE

More than 3-15/16"

More than 19-11/16"

5-3/16"

Liquid pipe

1/4 flared

35-7/16"

1-3/16"

4-3/4"

(Base bolt M10)

Drain hole 3- 1-5/16"

Note : Leave front and both sides

free of obstruction.

Note : Leave front and overhead

free of obstruction.

Note : Leave rear, overhead and both sides

free of obstruction.

1.Installation space

2.Service space

C unit connection

B unit connection

A unit connection

Conduit cover

Lock nut Connector

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