Mitsubishi Electric M-Series User manual

SERVICE MANUAL

Model name

Model name

Series MVZ

MVZ-A12AA4

MVZ-A18AA4

MVZ

-

A24AA4

Air-Conditioners

M-SERIES

MVZ-A12, 18, 24, 30, 36AA7

Multi-Position Air Handler

INDOOR UNIT

Contents

1. SAFETY PRECAUTION .....................................................................................................................................................2

1-1. Always observe for safety .........................................................................................................................................2

1-2. Cautions related to new refrigerant ...........................................................................................................................2

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

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

4. FAN PERFORMANCE AND CORRECTED AIR FLOW .....................................................................................................6

MVZ-A12AA7 ...................................................................................................................................................................6

MVZ-A18AA7 ...................................................................................................................................................................7

MVZ-A24AA7 ...................................................................................................................................................................8

MVZ-A30AA7 ...................................................................................................................................................................9

MVZ-A36AA7 .................................................................................................................................................................10

MVZ-A12, 18, 24, 30, 36AA7 .........................................................................................................................................11

5. SOUND PRESSURE LEVELS .........................................................................................................................................12

5-1. Sound pressure level ..............................................................................................................................................12

5-2. NC curves ...............................................................................................................................................................12

6. OUTLINES & DIMENSIONS ............................................................................................................................................15

7. WIRING DIAGRAM ..........................................................................................................................................................17

8. REFRIGERANT SYSTEM DIAGRAM ..............................................................................................................................18

9. HEATER CONTROL .........................................................................................................................................................19

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9-2. Fan control ..............................................................................................................................................................21

9-3. CN24RELAY-KIT-CM3 (Optional Parts) installation ................................................................................................22

10. HUMIDIFIER CONTROL ................................................................................................................................................24

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10-2. Installation .............................................................................................................................................................24

11.

ERV (ENERGY RECOVERY VENTILATION) CONTROL .......................................................................................................................25

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12. TROUBLESHOOTING ...................................................................................................................................................26

12-1. Cautions on troubleshooting .................................................................................................................................26

12-2. Self-check function ................................................................................................................................................27

12-3. Self-diagnosis action table ....................................................................................................................................29

12-4. Troubleshooting by inferior phenomena ...............................................................................................................33

12-5. Test point diagram .................................................................................................................................................34

12-6. Trouble criterion of main parts...............................................................................................................................36

12-7. Thermistor .............................................................................................................................................................36

12-8. DC Fan motor (FAN MOTOR/INDOOR CONTROLLER BOARD) .......................................................................37

12-9. Functions of DIP switch and jumper wire ..............................................................................................................38

13. DISASSEMBLY PROCEDURE ......................................................................................................................................39

13-1. Control box ............................................................................................................................................................39

13-2. Thermistor (Return Air) ..........................................................................................................................................40

13-3. Coil Assembly........................................................................................................................................................41

13-4. Blower/Fan Assembly............................................................................................................................................43

Cautions for units utilising refrigerant R410A

Use new refrigerant pipes.

Make sure that the inside and outside of refrige-

rant piping is clean and it has no contamination

such as sulfur hazardous for use, oxides, dirt,

shaving particles, etc.

In addition, use pipes with specified thickness.

Store the piping to be used indoors during

installation and both ends of the piping sealed

until just before brazing. (Leave elbow joints, etc.

in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small

amount) as the refrigerant oil applied to flares

and flange connections.

In case of using the existing pipes for R22, be careful with

the followings.

· For A36 and A42, be sure to perform replacement oper-

ation before test run.

· Change flare nut to the one provided with this product.

Use a newly flared pipe.

· Avoid using thin pipes.

Charge refrigerant from liquid phase of gas

cylinder.

If the refrigerant is charged from gas phase, composition

change may occur in refrigerant and the efficiency will be

lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrige-

rant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check

valve.

Vacuum pump oil may flow back into refrigerant cycle and

that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for

use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Handle tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigera-

nt will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant

charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterio-

ration of refrigerant oil etc.

If dirt, dust or moisture enters into refrigerant cycle, that can

cause deterioration of refrigerant oil or malfunction of com-

pressor.

If large amount of mineral oil enters, that can cause deterio-

ration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during

operation. If refrigerant comes into contact with

a flame, poisonous gases will be released.

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely.

(2) Do not release refrigerant in the air.

(3) After completing service, charge the cycle with specified amount of refrigerant.

(4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Before obtaining access to terminal, all supply

circuits must be disconnected.

1-2. CAUTIONS RELATED TO NEW REFRIGERANT

2

SAFETY PRECAUTION1

1-1. Always observe for safety

1-2. Cautions related to new refrigerant

3

Gravimeter

Unit

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

1Gauge manifold · Only for R410A

· Use the existing fitting specifications. (UNF1/2)

· Use high-tension side pressure of 5.3MPa·G or over.

2Charge hose · Only for R410A

· Use pressure performance of 5.09MPa·G or over.

3 Electronic scale

4Gas leak detector · Use the detector for R134a, R407C or R410A.

5Adaptor for reverse flow check · Attach on vacuum pump.

6Refrigerant charge base

7Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

8Refrigerant recovery equipment

PART NAMES AND FUNCTIONS2

• Indoor Unit

Air

inlet Air

outlet

(1)Vertical (2)Horizontal Right

4

Ser vi ce Ref .

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity A

A

kW

F.L.A

m

3

/min (CFM)

Pa (in.WG)

External ﬁnish

Heat exchanger

Fan

Fan (drive) x No.

Fan motor output

Fan mot or

Airﬂow (Low-Mid-High)

External static pressure

Operation control & Thermostat

Sound pressure level

(Low-Mid-High) dB (A)

Drain pipe mm (in.)

Dimensions W mm (in.)

D mm (in.)

H mm (in.)

kg (lbs)

INDOOR UNIT

Weight

75Pa (0.30 in.WG)

125Pa (0.50 in.WG)

200Pa (0.80 in.WG)

1 phase, 60Hz, 208/230V

15

3.00

MVZ-A12AA7

Galvanized steel cabinet - Powder coated Slate Gray

Plate n coil

Sirocco fan

x 1

0.121

2.4

7.9-9.6-11.3 (280-340-400)

75-125-200 (0.30-0.50-0.80)

Remote controller & built-in

24-28-32

27-31-35

32-36-41

19.05 (3/4) FPT

432 (17)

548 (21-5/8)

1275 (50-1/4)

51 (113)

Ser vi ce Ref .

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity A

A

kW

F.L.A

m

3

/min (CFM)

Pa (in.WG)

Sound pressure level

(Low-Mid-High) dB (A)

Drain pipe mm (in.)

Dimensions W mm (in.)

D mm (in.)

H mm (in.)

kg (lbs)

INDOOR UNIT

Weight

75Pa (0.30 in.WG)

125Pa (0.50 in.WG)

200Pa (0.80 in.WG)

1 phase, 60Hz, 208/230V

15

3.00

MVZ-A18AA7

Galvanized Steel Cabinet - Powder coated Slate Gray

Plate n coil

Sirocco fan

x 1

0.121

2.4

11.6-14.1-16.6 (410-497-585)

75-125-200 (0.30-0.50-0.80)

Remote controller & built-in

26-30-34

28-32-36

33-37-41

19.05 (3/4) FPT

432 (17)

548 (21-5/8)

1275 (50-1/4)

51 (113)

External ﬁnish

Heat exchanger

Fan

Fan (drive) x No.

Fan motor output

Fan mot or

Airﬂow (Low-Mid-High)

External static pressure

Operation control & Thermostat

SPECIFICATION3

Air

inlet

Air

outlet

Air inlet

Air outlet

(3)Horizontal left (4)Down flow

5

Ser vi ce Ref .

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity A

A

kW

F.L.A

m3/min (CFM)

Pa (in.WG)

Sound pressure level

(Low-Mid-High) dB (A)

Drain pipe mm (in.)

Dimensions W mm (in.)

D mm (in.)

H mm (in.)

kg (lbs)

INDOOR UNIT

Weight

75Pa (0.30 in.WG)

125Pa (0.50 in.WG)

200Pa (0.80 in.WG)

Ser vi ce Ref .

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity A

A

kW

F.L.A

m3/min (CFM)

Pa (in.WG)

Sound pressure level

(Low-Mid-High) dB (A)

Drain pipe mm (in.)

Dimensions W mm (in.)

D mm (in.)

H mm (in.)

kg (lbs)

INDOOR UNIT

Weight

75Pa (0.30 in.WG)

125Pa (0.50 in.WG)

200Pa (0.80 in.WG)

Ser vi ce Ref .

Power supply (phase, cycle, voltage)

Max. Fuse Size

Min. Circuit Ampacity A

A

kW

F.L.A

m3/min (CFM)

Pa (in.WG)

Sound pressure level

(Low-Mid-High) dB (A)

Drain pipe mm (in.)

Dimensions W mm (in.)

D mm (in.)

H mm (in.)

kg (lbs)

INDOOR UNIT

Weight

75Pa (0.30 in.WG)

125Pa (0.50 in.WG)

200Pa (0.80 in.WG)

External ﬁnish

Heat exchanger

Fan Fan (drive) x No.

Fan motor output

Fan mot or

Airﬂow (Low-Mid-High)

External static pressure

Operation control & Thermostat

External ﬁnish

Heat exchanger

Fan Fan (drive) x No.

Fan motor output

Fan mot or

Airﬂow (Low-Mid-High)

External static pressure

Operation control & Thermostat

External ﬁnish

Heat exchanger

Fan Fan (drive) x No.

Fan motor output

Fan mot or

Airﬂow (Low-Mid-High)

External static pressure

Operation control & Thermostat

MVZ-A24AA7

1 phase, 60Hz, 208/230V

15

3.00

Galvanized Steel Cabinet - Powder coated Slate Gray

Plate n coil

Sirocco fan x 1

0.121

2.4

14.6-17.7-20.8 (515-625-735)

75-125-200 (0.30-0.50-0.80)

Remote controller & built-in

28-33-36

30-34-38

34-38-42

19.05 (3/4) FPT

432 (17)

548 (21-5/8)

1275 (50-1/4)

51 (113)

MVZ-A30AA7

1 phase, 60Hz, 208/230V

15

4.13

Galvanized Steel Cabinet - Powder coated Slate Gray

Plate n coil

Sirocco fan x 1

0.244

3.3

17.3-21.1-24.8 (613-744-875)

75-125-200 (0.30-0.50-0.80)

Remote controller & built-in

30-34-38

32-36-40

35-39-43

19.05 (3/4) FPT

534 (21)

548 (21-5/8)

1378 (54-1/4)

64 (141)

MVZ-A36AA7

1 phase, 60Hz, 208/230V

15

4.13

Galvanized Steel Cabinet - Powder coated Slate Gray

Plat e fin coil

Sirocco fan 1

0.244

3.3

21.7-26.4-31.0 (767-931-1095)

75-125-200 (0.30-0.50-0.80)

Remote controller & built-in

33-37-41

35-39-43

37-41-45

19.05 (3/4) FPT

534 (21)

548 (21-5/8)

1378 (54-1/4)

64 (141)

6

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

7

[247]

10

[353]

14

[494]

7

[247]

10

[353]

14

[494]

7

[247]

10

[353]

14

[494]

7

[247]

10

[353]

14

[494]

50

[0.20]

75

[0.30]

125

[0.50]

100

[0.40]

150

[0.60]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

7

[247]

10

[353]

14

[494]

7

[247]

10

[353]

14

[494]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

25

[0.10]

50

[0.20]

100

[0.40]

75

[0.30]

125

[0.50]

150

[0.60]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

Low Low

Low

Middle

High High

High

Low

Low Low

Middle

Middle Middle

High

High High

MVZ-A12AA4

• Vertical, Horizontal Right, Horizontal Left • Downflow

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

FAN PERFORMANCE AND CORRECTED AIR FLOW4

MVZ-A12AA7

7

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

10

[353]

15

[530]

20

[706]

10

[353]

15

[530]

20

[706]

10

[353]

15

[530]

20

[706]

10

[353]

15

[530]

20

[706]

Airflow rate (m3/min)[cfm]

10

[353]

15

[530]

20

[706]

10

[353]

15

[530]

20

[706]

50

[0.20]

75

[0.30]

125

[0.50]

100

[0.40]

150

[0.60]

Static pressure (Pa)[in.WG]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

25

[0.10]

50

[0.20]

100

[0.40]

75

[0.30]

125

[0.50]

150

[0.60]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

Low

Middle

High

Low

Middle

Middle Middle

High

High High

MVZ-A18AA4

• Vertical, Horizontal Right, Horizontal Left • Downflow

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

MVZ-A18AA7

8

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

13

[459]

15

[530]

24

[847]

20

[706]

13

[459]

15

[530]

24

[847]

20

[706]

13

[459]

15

[530]

24

[847]

20

[706]

13

[459]

15

[530]

22

[777]

20

[706]

Airflow rate (m3/min)[cfm]

13

[459]

15

[530]

24

[847]

20

[706]

50

[0.20]

75

[0.30]

125

[0.50]

100

[0.40]

150

[0.60]

Static pressure (Pa)[in.WG]

13

[459]

15

[530]

22

[777]

20

[706]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

25

[0.10]

50

[0.20]

100

[0.40]

75

[0.30]

125

[0.50]

150

[0.60]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

Low

Middle Middle

Middle

High High

High

Low

Low Low

Middle

Middle Middle

High

High High

MVZ-A24AA4

• Vertical, Horizontal Right, Horizontal Left • Downflow

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

MVZ-A24AA7

9

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

15

[530]

20

[706]

29

[1024]

25

[883]

15

[530]

20

[706]

29

[1024]

25

[883]

15

[530]

20

[706]

28

[989]

25

[883]

15

[530]

20

[706]

27

[953]

25

[883]

15

[530]

20

[706]

29

[1024]

25

[883]

15

[530]

20

[706]

29

[1024]

25

[883]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

25

[0.10]

50

[0.20]

100

[0.40]

75

[0.30]

125

[0.50]

150

[0.60]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

25

[0.10]

50

[0.20]

100

[0.40]

75

[0.30]

125

[0.50]

150

[0.60]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

Low Low

Low

Middle

High

Low

Low Low

Middle

High

MVZ-A30AA4

• Vertical, Horizontal Right, Horizontal Left • Downflow

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

MVZ-A30AA7

10

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

19

[671]

25

[883]

20

[706]

33

[1165]

30

[1059]

19

[671]

25

[883]

20

[706]

32

[1130]

30

[1059]

19

[671]

25

[883]

20

[706]

32

[1130]

30

[1059]

Airflow rate (m3/min)[cfm]

19

[671]

25

[883]

20

[706]

32

[1130]

30

[1059]

19

[671]

25

[883]

20

[706]

32

[1130]

30

[1059]

50

[0.20]

75

[0.30]

125

[0.50]

100

[0.40]

150

[0.60]

Static pressure (Pa)[in.WG]

75

[0.30]

100

[0.40]

150

[0.60]

125

[0.50]

175

[0.70]

200

[0.80]

225

[0.90]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

25

[0.10]

50

[0.20]

100

[0.40]

75

[0.30]

125

[0.50]

175

[0.70]

150

[0.60]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

19

[671]

25

[883]

20

[706]

32

[1130]

30

[1059]

0

[0]

25

[0.10]

75

[0.30]

50

[0.20]

100

[0.40]

125

[0.50]

50

[0.20]

75

[0.30]

125

[0.50]

100

[0.40]

150

[0.60]

175

[0.70]

200

[0.80]

Airflow rate (m3/min)[cfm]

Static pressure (Pa)[in.WG]

Low

Middle

High

Low

Low Low

Middle

Middle Middle

High

MVZ-A36AA4

• Vertical, Horizontal Right, Horizontal Left • Downflow

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.60 [in.WG] (150Pa) 208/230V 60Hz

External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz

External static pressure 0.50 [in.WG] (125Pa) 208/230V 60Hz

External static pressure 0.80 [in.WG] (200Pa) 208/230V 60Hz

MVZ-A36AA7

11

Airflow rate (m3/min)[cfm]

External static pressure (Pa)[in.WG]

0

[0]

10

[353]

20

[706]

30

[1059]

40

[1412]

50

[1766]

MVZ-A12, 18, 24, 30, 36AA4

0

[0]

5

[0.020]

10

[0.040]

15

[0.060]

20

[0.080]

25

[0.100]

Power source:208/230V 60Hz

A

ir filter

A12,18,24A12,18,24

A30,36

MVZ-A12, 18, 24, 30, 36AA7

12

SOUND PRESSURE LEVELS5

5-1. Sound pressure level

Multi-Position

5-2. NC curves

MVZ-A12AA7 MVZ-A18AA7

13

MVZ-A24AA7 MVZ-A30AA7

14

MVZ-A36AA7

15

6OUTLINES & DIMENSIONS

INDOOR UNIT

MVZ-A12, 18, 24, 30, 36AA7

Control box

Air filter

Air outlet

Air inlet

(Duct)

(Gravity drain)

Secondary drain pipe

(Emergency draining)

ø19.05(3/4) 3/4"FPT

(Gravity drain)

(Horizontal left)

(Horizontal Right)

Secondary drain pipe

(Emergency draining)

Primary drain pipe

(Gravity drain)

ø19.05(3/4) 3/4"FPT

Secondary drain pipe Primary drain pipe

ø19.05(3/4) 3/4"FPT

Primary drain pipe

ø19.05(3/4) 3/4"FPT

(Emergency draining)

ø19.05(3/4) 3/4"FPT

Refrigerant piping

flare connection(gas)

Refrigerant piping

flare connection(liquid)

Terminal block

(Indoor / Outdoor unit connection)

Terminal block

(Remote controller transmission)

2-ø4.6 Burring Holes

for electric heat installation

ø26 Knockout Hole

(Remote controller transmission)

ø26 Knockout Hole

(Indoor / Outdoor unit

connection)

(Indoor / Outdoor

unit connection)

(Remote controller

transmission)

Unit:mm(in.)

Model A B C D E F G H J Gas pipe Liquid pipe

MVZ-A12AA7 432

(17) 376

(14-13/16)

281

(11-1/8)

224

(8-7/8)

1275

(50-1/4)

680

(26-13/16)

823

(32-7/16)

735.5

(29) 360

(14-3/16)

ø

12.7

(1/2)

ø

6.35

(1/4)

MVZ-A18AA7

MVZ-A24AA7

ø

15.88

(5/8)

ø

9.52

(3/8)

MVZ-A30AA7 534

(21) 477

(18-13/16)

382.6

(15-1/8)

266.5

(10-1/2)

1378

(54-1/4)

737

(29-1/16)

953.5

(37-9/16)

792

(31-3/16)

461

(18-3/16)

MVZ-A36AA7

Top

view

Front

Bottom

view

Left side

view

Right side

view

Model

Nominal Filter Size Duct Connection

MVZ-A12AA7 508X406.4X25.4

(20X16X1) 376X402

(14-13/16X15-7/8)

MVZ-A18AA7

MVZ-A24AA7

MVZ-A30AA7 508X508X25.4

(20X20X1) 477X402

(18-13/16X15-7/8)

MVZ-A36AA7

J

77.8(3-1/8)

66(2-5/8)

525.5(20-3/4)

36.8(1-1/2)

50.8(2)

470(18-9/16)

H55(2-3/16)

G70(2-13/16)

43(1-3/4) 8(3/8)

92(3-5/8) 30(1-3/16)

8(3/8)

F

55(2-3/16)

43(1-3/4)

8(3/8)

D

55(2-3/16)

548(21-5/8)

117.4 (4-5/8)

402(15-7/8)

B(Duct) 28.8(1-3/16)

76(3)

C

E

A

24(15/16)

13.2(9/16)

Note 1.Keep the service space for maintenance at the front.

1

3

2

1 2

16

609.6(24)

Width of Unit

609.6(24)

Length of Unit

Clearance Area

Vertical Installation Horizontal Installation

Unit:mm(in.)

609.6(24)

TO OUTDOOR UNIT

S3

S1

S2

RFI

11

2

CNXB1

CN2A

U

(BLUE)

TB15

CNXA2

t˚

TH2 TH5

TB4

CN2L

(BLUE)

CN22

t˚

TH1

CN3C

2

LED3

(RED)

(BLUE)

CNXA1 CNMFCNXC1

ON

OFF

LED2

LED1

DC280-340V

RECTIFIER CIRCUIT

(BLACK)

CN44

(RED)

ZNR01

CND

ZNR02

DSA

F01

CNXC2

CNXB2

CN51

CN41

CN105

CN90

CN20

SWE

X10

(RED)

U

FAN MOTOR

P. B .

I.B.

INSIDE SECTION OF CONTROL BOX

4

4123

3

2

4

51

2

1

3

4

1

5

3

1

2

1

153

2

1

4

3

1

2

12 321 17654

3~

MS

CNF

(GREEN)

CN24-1

(YELLOW)

CN24-2

(BLUE)

CN2C

(BLACK)

CNER

(RED) CN25

W.B.

1

2

3

4

5

6

7

8

9

t˚

OPTIONAL PARTS

TRANSMISSION

WIRES DC 12V

SW2

SW1

REMOTE CONTROLLER

R.B.

SW5

TB6

OPTIONAL PARTS

4

3

1

2

CN4F

CN32

4

5

3

2

1

ON

12345

SW2 SW2 SW2

ON

5

4

3

2

1

SW1

54321

SW1

ON

54321

SW1

ON

54321

54321687

SW5

ON

54321687

ON

54321687

SW5 SW5

Note1.Since the outdoor side electric wiring may change

be sure

to check the outdoor unit electric wiring for

servicing.

2.Indoor and outdoor connecting wires are made with

polarities,make wiring matching terminal numbers

(S1,S2,S3).

3.Symbols used in wiring diagram above are as

follows.

:CONNECTOR

:TERMINAL

(HEAVY DOTTED LINE):FIELD WIRING

(THIN DOTTED LINE):OPTIONAL PARTS

4.Use copper supply wire.

UTILISER DES FILS D'ALIMENTATION EN CUIVRE.

SWITCH (FOR MODE SELECTION)

SW5

CONNECTOR (HEATER CONTROL 1ST)

CN2A

CONNECTOR (RADIO FREQUENCY INTERFACE)

INDOOR CONTROLLER BOARD

I.B.

CN105

SYMBOL EXPLANATION

CONNECTOR (WIRELESS)

FUSE AC250V 6.3A

CONNECTOR (CENTRALLY CONTROL)

CONNECTOR (HA TERMINAL-A)

LED(REMOTE CONTROLLER SUPPLY)

INDOOR CONTROLLER BOARD

CONNECTOR (REMOTE SWITCH)

LED(TRANSMISSION INDOOR-OUTDOOR)

F01

CN41

CN51

CN2L

NAME

SW1

SW2

CN32

I.B.

SYMBOL

SYMBOL NAME

SWE

TH1 INTAKE AIR TEMP. THERMISTOR

TH2 PIPE TEMP

.

THERMISTOR/LIQUID

TH5 COND

.

/EVA

.

TEMP

.

THERMISTOR

LED1

LED2

LED3

CONNECTOR (LOSSNAY)

LED(POWER SUPPLY)

NAMESYMBOL

TERMINAL BLOCK

(REMOTE CONTROLLER TRANSMISSION LINE)

TERMINAL BLOCK

(INDOOR/OUTDOOR CONNECTING LINE)

TB4

TB15

P. B .

POWER SUPPLY BOARD

VARISTOR

ZNR01,02

CN90

SWITCH (FOR MODEL SELECTION)

SWITCH (FOR CAPACITY CODE)

CONNECTOR (EMERGENCY OPERATION)

RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT

RFI

TERMINAL BLOCK

(REMOTE CONTROLLER TRANSMISSION LINE)

TB6

WIRED REMOTE CONTROLLER BOARD

R.B.

SW2

SWITCH(COOLING ON/OFF)

SWITCH(HEATING ON/OFF)

SW1

IR WIRELESS REMOTE CONTROLLER BOARD

LED(RUN INDICATOR)

BUZZER

OPTIONAL PARTS

LED1

BZ1

RECEIVING UNIT

RU

W.B.

CN24-1

CN24-2

CONNECTOR (HEATER CONTROL 2ND)

CONNECTOR (0-10V ANALOG INPUT)

CN25

CONNECTOR (HUMIDITY OUTPUT)

CN2C

CONNECTOR (ERV OUTPUT)

CONNECTOR (ERV INPUT)

CNER

CNF

CONNECTOR (HUMIDITY INPUT)

ON

SW2 SW2

ON

5

4

3

2

1

SW1

ON

54321

MODEL

MVZ-A12AA4

MVZ-A18AA4

MVZ-A24AA4

MVZ-A30AA4

MVZ-A36AA4

SW1

ON

54321

ON

54321687

SW5

ON

54321687

ON

SW5

SWITCH

DSA

X10

ARRESTOR

AUX.RELAY

RU

BZ1

CN1

123456789

SW2SW1

LED1

17

7WIRING DIAGRAM

MVZ-A12, 18, 24, 30, 36AA7

ON

12345

SW2 SW2 SW2

ON

5

4

3

2

1

SW1

54321

SW1

ON

54321

SW1

ON

54321

54321687

SW5

ON

54321687

ON

54321687

SW5 SW5

ON

SW2 SW2

ON

5

4

3

2

1

SW1

ON

54321

MODEL

MVZ-A12AA7

MVZ

-

A

18

AA4

MVZ-A18AA7

M

VZ-A24AA

4

MVZ-A24AA7

MVZ

-

A

30

AA4

MVZ-A30AA7

MVZ

-

A

36

AA4

MVZ-A36AA7

SW1

ON

54321

ON

54321687

SW5

ON

54321687

ON

SW5

SWITCH

SWITCH (FOR MODE SELECTION)

SW5

CONNECTOR (HEATER CONTROL 1ST)

CN2A

CONNECTOR (RADIO FREQUENCY INTERFACE)

INDOOR CONTROLLER BOARD

I.B.

CN105

CONNECTOR (WIRELESS)

FUSE AC250V 6.3A

CONNECTOR (CENTRALLY CONTROL)

CONNECTOR (HA TERMINAL-A)

LED(REMOTE CONTROLLER SUPPLY)

INDOOR CONTROLLER BOARD

CONNECTOR (REMOTE SWITCH)

LED(TRANSMISSION INDOOR-OUTDOOR)

F01

CN41

CN51

CN2L

NAME

SW1

SW2

CN32

I.B.

SYMBOL

SYMBOL NAME

SWE

TH1 INTAKE AIR TEMP. THERMISTOR

TH2 PIPE TEMP. THERMISTOR/LIQUID

TH5 COND./EVA.TEMP. THERMISTOR

LED1

LED2

LED3

CONNECTOR (LOSSNAY)

LED(POWER SUPPLY)

NAMESYMBOL

TERMINAL BLOCK

(REMOTE CONTROLLER TRANSMISSION LINE)

TERMINAL BLOCK

(INDOOR/OUTDOOR CONNECTING LINE)

TB4

TB15

P. B . POWER SUPPLY BOARD

VARISTOR

ZNR01,02

CN90

SWITCH (FOR MODEL SELECTION)

SWITCH (FOR CAPACITY CODE)

CONNECTOR (EMERGENCY OPERATION)

RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT

RFI

TERMINAL BLOCK

(REMOTE CONTROLLER TRANSMISSION LINE)

TB6

WIRED REMOTE CONTROLLER BOARD

R.B.

SW2 SWITCH(COOLING ON/OFF)

SWITCH(HEATING ON/OFF)

SW1

IR WIRELESS REMOTE CONTROLLER BOARD

LED(RUN INDICATOR)

BUZZER

OPTIONAL PARTS

LED1

BZ1

RECEIVING UNIT

RU

W.B.

CN24-1

CN24-2

CONNECTOR (HEATER CONTROL 2ND)

CONNECTOR (0-10V ANALOG INPUT)

CN25 CONNECTOR (HUMIDITY OUTPUT)

CN2C CONNECTOR (ERV OUTPUT)

CONNECTOR (ERV INPUT)

CNER

CNF CONNECTOR (HUMIDITY INPUT)

DSA

X10

ARRESTOR

AUX.RELAY

18

8REFRIGERANT SYSTEM DIAGRAM

MVZ-A12, 18, 24, 30, 36AA7

Thermistor TH2

Pipe temperature(Liquid)

Distributor

with strainer (#50)

Thermistor TH5

(Cond./ Eva.temperature)

Thermistor TH1

(Room temperature)

Refrigerant flow in cooling

Refrigerant flow in heating

Strainer (#50)

Heat exchanger

Refrigerant GAS pipe connection

(Flare)

Refrigerant LIQUID pipe connection

(Flare)

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Mitsubishi Electric M-Series User manual

Mitsubishi Electric M-Series User manual

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