Mitsubishi Electric Mr. Slim MSZ-A09NA Manuale utente

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ··································· 3

2. PART NAMES AND FUNCTIONS····················· 4

3. SPECIFICATION················································ 5

4. OUTLINES AND DIMENSIONS ························ 7

5. WIRING DIAGRAM············································ 8

6. REFRIGERANT SYSTEM DIAGRAM ··············· 9

7. SERVICE FUNCTIONS ··································· 10

8. TROUBLESHOOTING······································11

9. DISASSEMBLY INSTRUCTIONS···················· 25

10. PARTS LIST····················································· 30

10-1. PARTS LIST············································ 30

10-2. RoHS PARTS LIST································· 36

11. MICROPROCESSOR CONTROL···················· 42

No. OB450

REVISED EDITION-D

SPLIT-TYPE AIR CONDITIONERS

MSZ-A09/12/15/17NA

MSY-A15/17NA

INDOOR UNIT

Outdoor unit service manual

MUZ-A·NA, GA·NA Series (OB451)

MUY-A·NA, GA·NA Series (OB451)

MXZ-A·NA Series (OB444)

NOTE:

RoHS compliant products have <G> mark on the spec name plate.

For servicing of RoHS compliant products, refer to the PARTS

LIST (RoHS compliant).

Revision D:

• MSZ-GA•NA and MSY-GA•NA have been added.

Please void OB450 REVISED EDITION-C.

Models

MSZ-A09NA, - 1

MSZ-A12NA, - 1

MSZ-A15NA, - 1

MSZ-A17NA, - 1

MSZ-A24NA, - 1

MSY-A15NA, - 1

MSY-A17NA, - 1

MSY-A24NA, - 1

MSZ-GA24NA

MSY-GA24NA

Revision A:

• PARTS LIST has been revised. (10-1.8, 10-2.8)

Revision B:

• MSZ-A•NA-1and MSY-A•NA-1

Remote controller has been changed.

Revision C:

• SPECIFICATION has been corrected.

Powerful has been added. (Airflow , Sound level)

Revision D:

• MSZ-GA•NA and MSY-GA•NA have been added.

1. Remote controller has been changed.

• Temperature indication function (°F/°C) has been added. (Refer to 11-10.)

• Timer indication has been changed. (AM/PM indication)

2. Conduit plate has been removed. (MSZ-A09/12/15/17, MSY-A15/17)

3. Conduit cover, terminal block cover and terminal block holder have been changed. (MSZ-A09/12/15/17, MSY-A15/17)

MSZ09UN →MSZ-A09NA

MSZ12UN →MSZ-A12NA

MSH15TN →MSZ-A15NA

MSH17TN →MSZ-A17NA

1. Control method between indoor and outdoor has been changed.

2. Indoor fan motor has been changed.

3. Signal of remote controller has been changed. (It is not available for conventional models.)

MSZ-A09NA →MSZ-A09NA-1

MSZ-A12NA →MSZ-A12NA-1

MSZ-A15NA →MSZ-A15NA-1

MSZ-A17NA →MSZ-A17NA-1

MSH24WN →MSZ-A24NA

MS15TN →MSY-A15NA

MS17TN →MSY-A17NA

MS24WN →MSY-A24NA

MSZ-A24NA →MSZ-A24NA-1

MSY-A15NA →MSY-A15NA-1

MSY-A17NA →MSY-A17NA-1

MSY-A24NA →MSY-A24NA-1

Models Remote controller Temperature indication

MSZ-A09/12/15/17NA KM06A °F

MSZ-A09/12/15/17NA- 1KM07J °F/°C

MSZ-A24NA KM06B °F

MSZ-A24NA - 1KM07K °F/°C

MSY-A15/17NA KM06C °F

MSY-A15/17NA - 1KM07L °F/°C

MSY-A24NA KM06D °F

MSY-A24NA - 1KM07M °F/°C

TECHNICAL CHANGES

MSZ-A24NA-1→MSZ-GA24NA

MSY-A24NA-1→MSY-GA24NA

1. Indoor electronic control P.C. board has been changed.

Line flow fan

Air outlet

Vertical vane

Air inlet

Display section

Front panel

Panel Heat exchanger

Horizontal vane

Operation section

(When the front panel is opened)

Remote controller

Remote control

receiving section

Catechin air filter

Air cleaning filter

(Anti-Allergy Enzyme

Filter, Blue bellows

type)

Emergency operation switch

Operation indicator lamp

Remote control

receiving section

Operation Indicator

lamp

PART NAMES AND FUNCTIONS

MSZ-A09NA MSY-A15NA

MSZ-A12NA MSY-A17NA

MSZ-A15NA

MSZ-A17NA

MSZ-A24NA MSY-A24NA

MSZ-GA24NA MSY-GA24NA

MSZ-A09NA

MSZ-A12NA

MSZ-A15NA

MSZ-A17NA

MSY-A15NA

MSY-A17NA

MSZ-A24NA MSY-A24NA

MSZ-GA24NA MSY-GA24NA

ACCESSORIES

MSZ-A09/12/15/17NA

MSY-A15/17NA

MSZ-A09/12/15/17NA- 1

MSY-A15/17NA- 1

MSZ-A24NA MSY-A24NA

MSZ-GA24NA MSY-GA24NA

Installation plate 1 1 1

Installation plate ﬁxing screw 4 × 25 mm 8 5 7

Remote controller holder 1 1 1

Fixing screw for 3.5 × 1.6 mm (Black) 2 2 2

Battery (AAA) for remote controller 2 2 2

Wireless remote controller 1 1 1

Felt tape (Used for left or left-rear piping) 1 1 1

Conduit plate 1 – –

3SPECIFICATION

Indoor unit model MSZ-A09NA MSZ-A12NA

External ﬁnish White

Power supply V, phase, Hz 208/230, 1, 60

Max.-fuse size (time delay) / Disconnect switch A 15

Min. circuit ampacity A 1.0

Fan motor F.L.A 0.76

Airﬂow

Low–Med.–High–Powerful

COOL Dry (Wet) CFM

152-229-307-338

(134-205-275-303) 152-240-353-388

(134-215-318-349)

HEAT 159-222-307-321 159-240-353-353

Moisture removal pt./h 2.3 3.2

Sound level

Low–Med.–High–Powerful

COOL dB(A) 22-33-38-41 22-34-42-44

HEAT 22-33-38-39 22-34-42-42

Cond. drain connection O.D. in. 5/8

Dimensions

in.

30-11/16

D8-1/4

H11-3/4

Weight Ib. 23

Remote controller Wireless type

Control voltage (by built-in transformer) 12-24 VDC

Indoor unit model MSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NA

External ﬁnish White

Power supply V, phase, Hz 208/230, 1, 60

Max.-fuse size (time delay) / Disconnect switch A 15

Min. circuit ampacity A 1.0

Fan motor F.L.A 0.76

Airﬂow

Low–Med.–High–Powerful

COOL Dry (Wet) CFM 268-328-381-419 (240-293-342-376)

HEAT 254-314-381-381 — 254-314-381-381 —

Moisture removal pt./h 4.7 5.2

Sound level

Low–Med.–High–Powerful

COOL dB(A) 34-40-45-47 34-40-46-48

HEAT 34-38-44-44 — 34-38-44-44 —

Cond. drain connection O.D. in. 5/8

Dimensions

in.

30-11/16

D8-1/4

H11-3/4

Weight Ib. 23

Remote controller Wireless type

Control voltage (by built-in transformer) 12-24 VDC

Indoor unit model MSZ-A24NA MSZ-GA24NA MSY-A24NA MSY-GA24NA

External ﬁnish White

Power supply V, phase, Hz 208/230, 1, 60

Max.-fuse size (time delay) / Disconnect switch A 15

Min. circuit ampacity A 1.0

Fan motor F.L.A 0.76

Airﬂow

Low–Med.–High–Powerful

COOL Dry (Wet) CFM 296-431-568-624 (265-385-508-558)

HEAT 296-486-568-590 350-486-568-590 —

Moisture removal pt./h 7.3

Sound level

Low–Med.–High–Powerful

COOL dB(A) 34-40-49-51

HEAT 34-40-48-49 —

Cond. drain connection O.D. in. 5/8

Dimensions

in.

43-5/16

D10-1/4

H12-13/16

Weight Ib. 37

Remote controller Wireless type

Control voltage (by built-in transformer) 12-24 VDC

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

Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB) Rated frequency

(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB Rated frequency

(Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB Maximum frequency

3-1. OPERATING RANGE

(1) POWER SUPPLY

Rated voltage Guaranteed Voltage (V)

Indoor unit

208/230 V

1 phase

60 Hz

Min.187 208 230 Max.253

3-2. OUTLET AIR SPEED AND COVERAGE RANGE

Model Mode Function Air ﬂow (CFM) Air speed

(ft./sec.)

Coverage

range (ft.)

MSZ-A09NA

HEAT Dry 307 16.8 23.4

COOL Dry 307 16.8 23.4

Wet 275 15.1 21.0

MSZ-A12NA

HEAT Dry 353 19.3 26.7

COOL Dry 353 19.3 26.7

Wet 318 17.4 24.1

MSZ-A15NA HEAT Dry 381 20.9 28.8

MSZ-A15NA

MSY-A15NA COOL Dry 381 20.9 28.8

Wet 342 18.8 26.0

MSZ-A17NA HEAT Dry 381 20.9 28.8

MSZ-A17NA

MSY-A17NA COOL Dry 381 20.9 28.8

Wet 342 18.8 26.0

MSZ-A24NA

MSZ-GA24NA HEAT Dry 568 20.2 34.4

MSZ-A24NA

MSY-A24NA

MSZ-GA24NA

MSY-GA24NA

COOL

Dry 568 20.2 34.4

Wet 508 18.1 30.9

●The air coverage range is the ﬁg-

ure up to the position where the

air speed is 1 ft./sec., when air is

blown out horizontally from the

unit properly at the High speed

position.

The coverage range should be

used only as a general guideline

since it varies according to the

size of the room and furniture ar-

ranged inside the room.

(2) OPERATION

Mode Condition

Intake air temperature (°F)

Indoor Outdoor

DB WB DB WB

Cooling

Standard temperature 80 67 95 —

Maximum temperature 90 73 115 —

Minimum temperature 67 57 14 —

Maximum humidity 78% —

Heating

Standard temperature 70 60 47 43

Maximum temperature 80 67 75 65

Minimum temperature 70 60 14

5 (MUZ-GA24)

4 (MUZ-GA24)

Except - Umodel

4OUTLINES AND DIMENSIONS

Unit: inch

11-3/4

424-9/16

30-11/16

8-1/4 3/16

2-1/8

3/4

6-1/4

2-5/16

Air in

Air out

Installation plate

Insulation ø1-1/8

Drain hose ø5/8

(Connected part O.D)

Liquid line ø1/4 19-11/16

Gas line ø3/8 16-15/16

Insulation ø1-3/8 O.D

ø3/4 I.D

{

6-1/8 6-1/8

7/8

1-3/4

13-3/16 12-5/8

1-5/8 8-7/16

10-1/8

1-11/16

8-7/16

1/8 11-5/16

2-3/4

2-3/16

2-3/16 2-3/16

8-7/8 8-7/8

9/1610-3/4

9-3/16

Wall hole ø2-9/16

Indoor unit

Installation plate

7/16x13/16

Oblong hole

7/16x1 Oblong hole

7/8

hole

Conduit plate(MSZ-A•NA- and MSY-A•NA- are excluded.)

MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA

10-1/4

6-1/4

3/4

2-5/16

1-7/8

5/16

12-3/8

10-1/161-7/8

1/8

3-7/8

6-13/16

3-7/8 6-13/16

16-5/16 16-5/16

3/16

9-15/16

31-1/8

2-3/16

42-1/16

43-5/16

12-13/16

Air out

Air in

Insulation ø1-1/8

Drain hose ø5/8

(Connected part O.D)

Installation plate

Wall hole ø3

Wireless remote controller

Installation plate Indoor unit

{

Liquid line ø1/4 19-11/16

Gas line ø5/8 16-15/16

Insulation ø1-15/16 O.D

ø1-1/4 I.D

MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA

5WIRING DIAGRAM

MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA

MSZ-A24NA MSY-A24NA

MSZ-GA24NA MSY-GA24NA

REFRIGERANT SYSTEM DIAGRAM

MSZ-A09NA

MSZ-A12NA

Refrigerant flow in cooling

Refrigerant flow in heating

MSZ-A15NA MSY-A15NA

MSZ-A17NA MSY-A17NA

MSZ-A24NA MSY-A24NA

MSZ-GA24NA MSY-GA24NA

Unit: inch

Indoor

heat

exchanger

Room temperature

thermistor

RT11

Refrigerant pipe ø1/2

(with heat insulator)

Flared connection

Indoor coil

thermistor

RT12(main)

Refrigerant pipe ø1/4

(with heat insulator)

Distributor

Indoor coil

thermistor

RT13(sub)

Indoor

heat

exchanger

Room temperature

thermistor

RT11

Refrigerant pipe ø5/8

(with heat insulator)

Flared connection

Indoor coil

thermistor

RT12(main)

Refrigerant pipe ø1/4

(with heat insulator)

Distributor

Indoor coil

thermistor

RT13(sub)

Indoor

heat

exchanger

Room temperature

thermistor

RT11

Indoor coil

thermistor

RT13(sub)

Indoor coil

thermistor

RT12(main)

Refrigerant pipe ø3/8

(with heat insulator)

Flared connection

Refrigerant pipe ø1/4

(with heat insulator)

7SERVICE FUNCTIONS

7-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the indoor electronic control P.C. board.

The time will be shortened as follows. (Refer to 8-7.)

Set time: 1-minute →1-second

Set time: 3-minute →3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is

shortened by short circuit-of JPG and JPS.)

7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.

In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be

modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification.

The board has a print as shown below:

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote

controller for the indoor unit.

The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are

set.

The setting will be cancelled if the breaker has turned OFF, or the power supply has shut down.

Please conduct the above setting once again after the power has restored.

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.

After modification, press the RESET button.

NOTE: For modification, take out

the batteries and press the

OPERATE/STOP (ON/OFF)

button twice or 3 times at

first.

After finish modification,

put back the batteries then

press the RESET button.

MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA

MSY-A17NA MSY-A24NA MSZ-GA24NA MSY-GA24NA

Table 1

1 unit operation 2 units operation 3 units operation 4 units operation

No. 1 unit No modiﬁcation Same as at left Same as at left Same as at left

No. 2 unit — Solder J1 Same as at left Same as at left

No. 3 unit — — Solder J2 Same as at left

No. 4 unit — — — Solder both J1 and J2

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