Mitsubishi MUZ-A09NA, MUZ-A12NA, MUZ-A15NA, MUZ-A17NA, MUZ-A24NA Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

OUTDOOR UNIT

HFC

utilized

R410A

SERVICE MANUAL

Wireless type
Models

No. OB451

MUZ-A09NA MUZ-A09NA­MUZ-A12NA MUZ-A12NA­MUZ-A15NA MUZ-A15NA­MUZ-A17NA MUZ-A17NA­MUZ-A24NA MUZ-A24NA­MUY-A15NA
MUY-A17NA
MUY-A24NA

MUZ-A09NA MUY-A15NA
MUZ-A12NA MUY-A17NA
MUZ-A15NA

CONTENTS

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

2. PART NAMES AND FUNCTIONS······················5

3. SPECIFICATION·················································6

4. OUTLINES AND DIMENSIONS·······················10

5. WIRING DIAGRAM···········································11

6. REFRIGERANT SYSTEM DIAGRAM··············15

7. DATA·································································17

8. ACTUA TOR CONTROL····································30

9. SERVICE FUNCTIONS ····································31

10. TROUBLESHOOTING ······································31

11. DISASSEMBLY INSTRUCTIONS·····················59

12. PARTS LIST······················································66
12-1. PARTS LIST ·············································66
12-2. RoHS PARTS LIST··································72

13. OPTIONAL PARTS ·························BACK PAGE

Indoor unit service manual

MSZ-A•NA Series (OB450)

U1

U1

U1

U1

U1

NOTE:

This service manual describes technical data of the outdoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the PARTS

LIST (RoHS compliant).

TM

1

Refrigeration

oil

Refrigerant

New refrigerant

R410A

HFC-32: HFC-125 (50%:50%)

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-60.5

225.82

3.995

Non combustible

0

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non
Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

A1

86.5

-41.4

136.34

2.772

Non combustible

0.055
1700

Gas phase

Possible

Compatible oil

Light yellow

Non

Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (°F)
Steam pressure [77°F](PSIG)
Saturated steam density [77°F](lb/ft

3

)
Combustibility
ODP w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell

w1:Ozone Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter : based on CO

2

TECHNICAL CHANGES

MUZ09UN ➔ MUZ-A09NA
MUZ12UN ➔ MUZ-A12NA
MUH15TN ➔ MUZ-A15NA
MUH17TN ➔ MUZ-A17NA
MUH24WN ➔ MUZ-A24NA
MU15TN ➔ MUY-A15NA
MU17TN ➔ MUY-A17NA
MU24WN ➔ MUY-A24NA

1. Outdoor unit model has been changed.

2. Control method between indoor and outdoor unit has been changed.

3. Refrigerant has been changed. (R22 ➔ R410A)

4. Fan motor has been changed. (AC ➔ DC)

5. Compressor has been changed. (AC ➔ DC)

INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT

• This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer.

• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 air

conditioners.

1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/

materials are required. Refer to the table below.

2 Take sufficient care not to allow water and other contaminations to enter the R410Arefrigerant during storage and

installation, since it is more susceptible to contaminations than R22.

3 For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant

piping.)

4 Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent

composition change.

2

1.Tools dedicated for the air conditioner with R410A refrigerant

New Specification Current Specification

The incompatible refrigeration oil easily separates from
refrigerant and is in the upper layer inside the suction muffler.
Raising position of the oil back hole enables to back the
refrigeration oil of the upper layer to flow back to the
compressor.

Since refrigerant and refrigeration oil are compatible each,
refrigeration oil goes back to the compressor through the
lower position oil back hole.

Compressor

Suction muffler

Oil back hole

refrigeration oil

Refrigerant

Compressor

Suction muffler

Oil back hole

refrigeration oil /Refrigerant

Compressor

-22 -4 14 32 50 68

86

104 122 140

-73

0

73

145

218

290

363

435

508

580

(PSIG)

R410A
R22

Conversion chart of refrigerant temperature and pressure

Saturated liquid pressure

(°F)

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.

R410A tools

Gauge manifold
Charge hose

Gas leak detector
Torque wrench

Can R22 tools be used?

No
No

No

Yes

No 1/2in. and 5/8in.
Flare tool
Flare gauge

Vacuum pump
adapter

Electronic scale for
refrigerant charging

No : Not Substitutable for R410A Yes : Substitutable for R410A

Yes

New
New

New

Description

R410A has high pressures beyond the measurement range of existing
gauges.

Hose material have been changed to improve the pressure resistance.
Dedicated for HFC refrigerant.
1/4in. and 3/8in.

Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).

Provided to prevent the back flow of oil. This adapter enables you to use
vacuum pumps.

It is difficult to measure R410A with a charging cylinder because the
refrigerant bubbles due to high pressure and high-speed vaporization

3

R410A

Pipe diameter

inch

1/4
3/8
1/2
5/8

17 (11/16)

22 (7/8)
26 (1-1/32)
29 (1-5/32)

Dimension of flare nut

R22

mm(in)

17 (11/16)

22 (7/8)

24 (15/16)

27 (1-1/16)

2.Refrigerant piping

Wall thickness (in)

Outside diameter(in)

1/4
3/8
1/2
5/8

0.0315

0.0315

0.0315

0.0394

Heat resisting foam plastic
Specific gravity 0.045 Thickness 0.315 in

Insulation material

Electronic scale for refrigerant charging

Outdoor unit

Refrigerant gas
cylinder
operating valve

Refrigerant gas cylinder
for R410A with siphon

Refrigerant (liquid)

Service port

Gauge manifold
valve (for R410A)

Union

Liquid pipe
Gas pipe

Stop valve

Indoor unit

Charge hose (for R410A)

1 Specifications

Use the copper or copper-alloy seamless pipes for refrigerant that meet the following specifications.

2 Flaring work and flare nut

Flaring work for R410A pipe differs from that for R22 pipe.
For details of flaring work, refer to Installation manual “FLARING WORK”.

3.Refrigerant oil

Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces.

4.Air purge

• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installation, reinstallation, or repairs to the refrigerant

circuit.

• Use the vacuum pump for air purging for the purpose of environmental protection.

5.Additional charge

For additional charging, charge the refrigerant from liquid phase of the gas cylinder.
If the refrigerant is charged from the gas phase, composition change may occur in the refrigerant inside the cylinder and the
outdoor unit. In this case, ability of the refrigeration cycle decreases or normal operation can be impossible. However,
charging the liquid refrigerant all at once may cause the compressor to be locked. Thus, charge the refrigerant slowly.

4

2

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

Piping

Air outlet

Drain hose

Drain outlet

Air inlet

(back and side)

PART NAMES AND FUNCTIONS

MUZ-A09NA MUZ-A15NA MUY-A15NA
MUZ-A12NA MUZ-A17NA MUY-A17NA

MUZ-A24NA
MUY-A24NA

5

3

Item

Model

MSZ-A12NA

Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
OUTDOOR UNIT MODEL
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
Refrigerant pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units
Refrigerant charge (R410A)
Refrigerating oil (Model)

Btu/h
Btu/h
Btu/h

W
W
W

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

dB(A)

in.
in.
in.

Ib.

in.
in.

ft.
ft.

cc.

Munsell 3Y 7.8/1.1

208/230, 1, 60

15
12

0.52

KNB092FPAH

0.49

7.8

9.2

Liner expansion valve

48

Reverse cycle

31-1/2
11-1/4
21-5/8

82

Wireless type

12-24V DC

Not supplied

1/4 (0.0315)
3/8 (0.0315)

Flared
Flared

40
65

2lb.5oz.

320 (NE022)

9,000 (5,500~9,000)

10,900 (5,200~12,600)

7,700

690 (390~690)

860 (350~1,100)

880

13.0 [17.0]

8.2 (6.7)

3.71

12,000 (5,700~12,000)
13,600 (5,200~13,600)

8,300
1,170 (395~1,170)
1,160 (350~1,160)

930

10.3 [17.0]

8.2 (6.7)

3.44

MUZ-A09NA MUZ-A12NA

❈1 ❈3

❈1

❈1
❈2

❈1

❈1
❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating

MSZ-A09NA

Model
Winding resistance (at 68˚F) Ω

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

❈1

❈1

❈4

SPECIFICATION

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

❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: A09:50Hz A12:76Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: A09:71Hz A12:76Hz

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: A09:61Hz A12:76Hz

6

Item

Model

Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
OUTDOOR UNIT MODEL
External finish
Power supply
Max. fuse size (time delay)
Min. circuit ampacity
Fan motor

Compressor

Refrigerant control
Sound level dB(A)
Defrost method

Dimensions
Weight

REMOTE CONTROLLER
Control voltage (by built-in transformer)
REFRIGERANT PIPING
Refrigerant pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units
Refrigerant charge (R410A)
Refrigerating oil (Model)

Btu/h
Btu/h
Btu/h

W
W
W

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

in.
in.
in.

Ib.

in.
in.

ft.
ft.

cc.

16,200 (3,100~16,200)

–
–

2,070 (210~2,070)

–
–

7.8 [16.0]
–
–

16,200 (3,100~16,200)
20,100 (3,400~20,900)

13,000
2,070 (210~2,070)
2,150 (250~2,330)

1,740

7.8 [16.0]

8.2 (6.7)

2.74

15,000 (3,100~15,000)
18,000 (3,400~20,900)

13,000
1,690 (210~1,690)
1,790 (250~2,330)

1,740

8.9 [16.0]

8.2 (6.7)

2.95

50
51

50
—

52
53

52
—

15,000 (3,100~15,000)

–
–

1,690 (210~1,690)

–
–

8.9 [16.0]
–
–

❈1 ❈3

❈1

❈1
❈2

❈1

❈1
❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating

Model
Winding resistance (at 68°F) "

Cooling
Heating

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

MSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NA

MUZ-A15NA MUY-A15NA MUZ-A17NA MUY-A17NA

❈1

❈1 ❈1

❈4

Munsell 3Y 7.8/1.1

208/230, 1, 60

15
14

0.52

SNB130FPDH

0.45

10.1

12.0

Liner expansion valve

Reverse cycle

31-1/2
11-1/4
21-5/8

88

Wireless type

12-24V DC

Not supplied

1/4 (0.0315)
1/2 (0.0315)

Flared
Flared

40
65

2lb.7oz.

450 (NE022)

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

❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: A15:77Hz A17:89Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: A15:93Hz A17:93Hz

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: A15:78Hz A17:88Hz

7

Item

Model

MSY-A24NA

Capacity
Rated(Minimum~Maximum)
Capacity Rated
Power consumption
Rated(Minimum~Maximum)
Power consumption Rated
EER [SEER]
HSPF IV(V)
COP
OUTDOOR UNIT MODEL
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
Refrigerant pipe size
(Min. wall thickness)

Connection method
Between the indoor

& outdoor units
Refrigerant charge (R410A)
Refrigerating oil (Model)

Btu/h
Btu/h
Btu/h

W
W
W

V, phase, Hz

A
A

F.L.A

R.L.A
L.R.A

dB(A)

in.
in.
in.

Ib.

in.
in.

ft.
ft.

cc.

Munsell 3Y 7.8 1.1

208/230, 1, 60

20
17

0.93

SNB130FPDH

0.45

10.1

16.0

Liner expansion valve

55

Reverse cycle

33-1/16

13

33-7/16

128

Wireless type

12-24VDC

Not supplied

1/4 (0.0315)
5/8 (0.0394)

Flared
Flared

50
100
4lb.

450 (NE022)

22,000 (4,400~22,000)
23,200 (3,600~24,400)

15,200
2,880 (290~2,880)
2,350 (260~2,570)

1,960

7.6 [16.0]

8.2 (6.7)

2.89

22,000 (4,400~22,000)

—
—

2,880 (290~2,880)

—
—

7.6 [16.0]
—
—

❈1 ❈3

❈1

❈1
❈2

❈1

❈1
❈2

Cooling
Heating 47
Heating 17
Cooling
Heating 47
Heating 17
Cooling
Heating
Heating

MSZ-A24NA

MUZ-A24NA MUY-A24NA

Model
Winding resistance (at 68˚F) Ω

W
D
H

Liquid
Gas
Indoor
Outdoor
Height difference
Piping length

❈1

❈1

❈4

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

❈1 : Rating conditions (cooling) — Indoor : 80˚FDB, 67˚FWB, Outdoor : 95˚FDB, (75˚FWB) Rated frequency: 110Hz
❈2 : (heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 17˚FDB, 15˚FWB Maximum frequency: 108Hz

(heating) — Indoor : 70˚FDB, 60˚FWB, Outdoor : 47˚FDB, 43˚FWB Rated frequency: 101Hz

8

Test condition

SEER

(Cooling)

HSPF

(Heating)

ARI

Mode

"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

❈5

Standard Rating-Heating
at rated compressor Speed

Low temperature Heating
at rated compressor Speed

Max temperature Heating
at minimum compressor Speed

High temperature Heating
at minimum compressor Speed

Frost Accumulation
at rated compressor Speed

Test

Indoor air condition Outdoor air condition

Dry bulb

Wet bulb

Dry bulb

Wet bulb

80

80

80

80

80

70

70

70

70

70

70

67

67

67

67

67

60

60

60

60

60

60

Frost Accumulation
at Intermediate compressor Speed

❈5

95

82

82

67

87

47

17

62

47

35

35

(75)

(65)

(65)

(53.5)

(69)

43

15

56.5

43

33

33

❈5 : At Intermediate compressor Speed
=("Cooling rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

(Unit : [˚F])

❈3, ❈4

9

4

Liquid pipe :1/4 (flared)
Gas pipe :3/8 (flared) · · · MUZ-A09/12NA

:1/2 (flared) · · · MUZ-A15/17NA, MUY-A15/17NA

6-23/32

2

5-7/8

2-23/32

1-3/4

15-3/4

12 ~ 12-3/4

13-9/16

11/16

1-9/16

7/8

21-5/8

11-1/32

13/32

31-1/2

19-11/16

5-15/16

11-29/32

17/3229/32 11-1/4

Air in

handle

Air in

Air out

2- 3/8 o 13/16 Oval hole

Drainage hole [ 1-5/8

{

REQUIRED SPACE

Basically open 4inch or more
without any obstruction in front
and on both sides of the unit.

14 in.

or m

ore

8 in

. o

r m

o

re

4 in.

or more

4

in

. o

r m

o

re

Open two sides of left,
right, or rear side.

30-

3

5-

6-1/28

3-17/32

7-25/32

1-9/16

20-9/32

11-25/32

2-19/32

2

14-3/16

33-7/16

16-15/16

19-11/16

3-3/16

4-25/32

33-1/16

Open as a rule
20inch or more if
the front and both
sides are open

4inch or more
8inch or more if
there are obstacles
to both sides

Open as a rule
20inch or more if the back,
both sides and top are open

1

4

in

. o

r m

o

re

4

in

. o

r m

o

re

Air in

Air out

13

Service panel

Gas refrigerant
pipe joint
Refrigerant pipe
(flared) [5/8

Liquid refrigerant
pipe joint
Refrigerant pipe
(flared) [1/4

Drainage hole [ 1-5/8

4-3/8 o 13/16 Oval hole

REQUIRED SPACE

Air in

OUTLINES AND DIMENSIONS

MUZ-A09NA MUZ-A12NA MUZ-A15NA
MUZ-A17NA MUY-A15NA MUY-A17NA

Unit: inch

MUZ-A24NA MUY-A24NA

10

5

MUZ-A09NA MUZ-A12NA MUZ-A15NA MUZ-A17NA

WIRING DIAGRAM

11

MUY-A15NA MUY-A17NA

12

MUZ-A24NA

13

MUY-A24NA

14

6

Outdoor
heat
exchanger

Flared connection

Defrost
thermistor
RT61

Discharge
temperature
thermistor
RT62

Service
port

Service
port

Flared connection

Stop valve
(with strainer)

Stop valve
(with service port)

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating (MUZ)

Refrigerant pipe [3/8 (MUZ-A09/12)
[1/2 (MUZ-A15/17,MUY-A15/17)
(with heat insulator)

Refrigerant pipe [1/4
(with heat insulator)

R.V. coil
heating ON
cooling OFF

Strainer
#100

Capillary tube

O.D. 0.118 o I.D. 0.071
o 23-5/8
(

[3.0 o [1.8 o 600

)

Expansion
valve

Ambient
temperature
thermistor
RT65

Muffler

Muffler

Muffler

Outdoor
heat
exchanger

Flared connection

Defrost
thermistor
RT61

Service
port

Service
port

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve

Stop valve
(with service port)

Capillary tube

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe [5/8
(with heat insulator)

Refrigerant pipe [1/4
(with heat insulator)

LEV

R.V. coil
heating ON
cooling OFF

Muffler

#100

Strainer

#100

Receiver

Outdoor heat
exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Strainer

#100

O.D. 0.142 o I.D. 0.094
o 1-31/32
(

[3.6 o [2.4 o 50

)

REFRIGERANT SYSTEM DIAGRAM

MUZ-A09NA MUZ-A15NA MUY-A15NA
MUZ-A12NA MUZ-A17NA MUY-A17NA

Unit:inch

MUZ-A24NA

15

Max. length
A

Max. Height

difference

B

Indoor
unit

Outdoor unit

Max. length

A

Max. Height difference

B

Model

Gas

Liquid

3/8

1/4

1/2

1/4

5/8

40

50

65

100

1/4

Piping size O.D : in

Refrigerant piping : ft

MUZ-A09NA
MUZ-A12NA
MUZ-A15NA
MUY-A15NA
MUZ-A17NA
MUY-A17NA
MUZ-A24NA
MUY-A24NA

MUY-A24NA

Outdoor
heat
exchanger

Flared connection

Discharge
temperature
thermistor
RT62

Flared connection

Stop valve

Stop valve
(with service port)

Capillary tube

Refrigerant flow in cooling

Compressor

Service
port

Service
port

4-way valve

Refrigerant pipe [5/8
(with heat insulator)

Refrigerant pipe [1/4
(with heat insulator)

LEV

Muffler

#100

Strainer

#100

Receiver

Outdoor heat
exchanger
temperature
thermistor
RT68

Ambient
temperature
thermistor
RT65

Strainer

#100

O.D. 0.142 o I.D. 0.094
o 1-31/32
(

[3.6 o [2.4 o 50

)

Outdoor unit

precharged

3025 50

Model

Refrigerant piping length (one way) : ft

40

60 65

2lb.5oz.

2lb.7oz.

0 1.62 4.86 11.34 12.968.10

MUZ-A09NA
MUZ-A12NA
MUZ-A15NA
MUY-A15NA
MUZ-A17NA
MUY-A17NA

Calculation : Xoz. = 1.62/ 5oz./ ft o (Refrigerant piping length (ft)-25)

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Unit:inch

ADDITIONAL REFRIGERANT CHARGE (R410A:oz.)

Refrigerant piping exceeding 25ft. requires additional refrigterant charge according to the calculation.

16

7DATA

Model

Indoor air Outdoor intake air DB temperature(˚F

)

71
67
63
71
67
63
71
67
63
71
67
63
71
67
63

11.0

10.4

9.8

14.7

13.9

13.1

18.4

17.4

16.4

19.8

18.8

17.7

27.0

25.5

24.0

6.4

7.4

8.3

8.5

9.9

11.0

9.5

11.3

12.8

10.3

12.2

13.8

13.4

16.1

18.3

0.61

0.58

0.55

1.04

0.98

0.94

1.50

1.42

1.35

1.84

1.74

1.66

2.56

2.42

2.30

10.3

9.7

9.1

13.7

13.0

12.1

17.2

16.2

15.2

18.5

17.5

16.4

25.2

23.8

22.2

5.9

6.9

7.7

7.9

9.2

10.2

8.9

10.5

11.9

9.6

11.4

12.8

12.5

15.0

17.0

0.67

0.64

0.61

1.14

1.08

1.04

1.65

1.56

1.50

2.02

1.91

1.83

2.81

2.66

2.55

9.7

9.0

8.5

12.9

12.0

11.3

16.1

15.0

14.1

17.4

16.2

15.2

23.7

22.0

20.7

5.6

6.4

7.1

7.4

8.5

9.5

8.3

9.8

11.0

9.0

10.5

11.9

11.7

13.9

15.8

0.72

0.69

0.66

1.23

1.17

1.12

1.77

1.69

1.61

2.17

2.07

1.98

3.02

2.88

2.75

9.0

8.4

7.7

12.0

11.2

10.3

15.0

14.0

12.8

16.2

15.1

13.9

22.0

20.5

18.8

5.2

5.9

6.5

6.9

7.9

8.7

7.8

9.1

10.0

8.4

9.8

10.8

10.9

12.9

14.4

0.76

0.73

0.70

1.29

1.24

1.19

1.87

1.79

1.72

2.29

2.19

2.11

3.18

3.05

2.94

8.3

7.7

7.0

11.0

10.3

9.4

13.8

12.8

11.7

14.9

13.9

12.6

20.2

18.8

17.2

4.8

5.5

5.9

6.4

7.3

7.9

7.1

8.3

9.2

7.7

9.0

9.9

10.1

11.9

13.1

0.79

0.77

0.73

1.35

1.30

1.24

1.94

1.88

1.79

2.38

2.30

2.19

3.31

3.20

3.05

IWB

(˚F)

75 85 95 105 115

NOTE 1. IWB : Intake air wet-bulb temperature
TC : Total Capacity (x10

3

Btu/h), SHC : Sensible Heat Capacity (x10

3

Btu/h)

TPC : Total Power Consumption (kW)

2. SHC is based on 80˚F of indoor intake air DB temperature.

TC SHC

TPC TC SHC

TPC

TC SHC

TPC

TC SHC TPC

TC SHC

TPC

MSZ-A09NA

MSZ-A12NA

MSY-A15NA

MSY-A17NA

MSY-A24NA

MSZ-A15NA

MSZ-A17NA

MSZ-A24NA

Refrigerant piping length (one way : ft.)

1.0

25 (std.)

40

65

1.0

MSZ-A09/12/15/17NA
MSY-A15/17NA

MSZ-A24NA
MSY-A24NA

Model

0.954

0.95

0.878

0.878

100

0.713

50 60 70 80 90 100

Model

MUZ-A24NA
MUY-A24NA

Refrigerant piping length (one way) : ft

Outdoor unit

precharged

4lb. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20

25 30 40

Calculation : Xoz. = 1.08/ 5oz./ ft o (Refrigerant piping length (ft)-25)

NOTE : Refrigerant piping exceeding 25ft. requies additional refrigerant charge according to the calculation.

MUZ-A09NA MUZ-A12NA MUZ-A15NA
MUZ-A17NA MUZ-A24NA
MUY-A15NA MUY-A17NA MUY-A24NA

7-1. PERFORMANCE DATA

1) COOLING CAPACITY

2) COOLING CAPACITY CORRECTIONS

17

3) HEATING CAPACITY

Model

Indoor air Outdoor intake air WB temperature(˚F

)

75
70
65
75
70
65
75
70
65
75
70
65
75
70
65

6.3

6.7

6.9

7.9

8.4

8.6

10.4

11.1

11.3

11.7

12.4

12.7

13.5

14.3

14.6

0.64

0.62

0.59

0.86

0.84

0.80

1.33

1.29

1.24

1.60

1.55

1.48

1.75

1.69

1.62

7.9

8.2

8.6

9.9

10.2

10.7

13.1

13.5

14.1

14.6

15.1

15.8

16.8

17.4

18.2

0.75

0.74

0.71

1.02

0.99

0.96

1.57

1.53

1.48

1.88

1.84

1.77

2.06

2.01

1.94

9.4

9.6

10.0

11.8

12.0

12.4

15.6

15.9

16.5

17.4

17.8

18.4

20.1

20.5

21.2

0.84

0.82

0.80

1.13

1.10

1.07

1.75

1.70

1.66

2.10

2.04

1.99

2.29

2.23

2.17

10.6

10.9

11.2

13.3

13.6

14.0

17.6

18.0

18.5

19.6

20.1

20.7

22.6

23.2

23.9

0.88

0.86

0.84

1.19

1.16

1.13

1.83

1.79

1.75

2.20

2.15

2.10

2.41

2.35

2.29

11.0

11.2

11.6

13.7

14.0

14.4

18.1

18.5

19.1

20.2

20.7

21.3

23.3

23.9

24.6

0.89

0.88

0.85

1.21

1.18

1.15

1.86

1.83

1.77

2.24

2.19

2.13

2.44

2.40

2.33

12.4

12.7

13.0

15.5

15.8

16.2

20.5

21.0

21.4

22.9

23.4

23.9

26.4

27.0

27.6

0.93

0.91

0.89

1.25

1.23

1.21

1.93

1.90

1.86

2.32

2.28

2.24

2.54

2.49

2.44

IDB
(˚F)

15 25 35 43 45 55

MSZ-A09NA

MSZ-A12NA

MSZ-A15NA

MSZ-A17NA

MSZ-A24NA

NOTE: 1. IDB : Intake air dry-bulb temperature

TC : Total Capacity (x10

3

Btu/h)

TPC : Total Power Consumption (kW)

2. Above data is for heating operation without any frost.

TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC

How to operate with fixed operational frequency of the compressor.

1. Press the EMERGENCY OPERATION switch on the front of the indoor unit, and select either EMERGENCY COOL mode
or EMERGENCY HEAT mode before starting to operate the air conditioner.

2. The compressor starts up.
The operational frequency of the compressor.

3. The fan speed of the indoor unit is High.

4. This operation continues for 30minutes.

5. In order to release this operation, press the EMERGENCY OPERATION switch twice or once, or press any button on the
remote controller.

18

7-2. PERFORMANCE CURVE

65
70
75

75
70
65

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

Outdoor intake air WB temperature (°F)

= 307CFM

Airflow

12

14

10

8

9

11

13

15

7

1.0

15 25 35 45 55

0.8

0.6

0.7

0.9

In

d

o

o

r in

ta

k

e

a

ir D

B

te

m

p

e

ra

tu

re

(

°F

)

In

d

o

o

r in

ta

ke

a

ir D

B

te

m

p

e

ra

tu

re

(

°F

)

65
70
75

75
70
65

20

12

8

16

22

18

10

14

In

d

o

o

r in

ta

k

e

a

ir D

B

te

m

p

e

ra

tu

re

(

°F

)

= 318CFM

Airflow

15 25 35 45 55

Outdoor intake air WB temperature (°F)

1.3

0.8

0.9

1.0

1.1

1.2

Indoor intake air DB temperature (

°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

65
70
75

75
70
65

Outdoor intake air WB temperature (°F)

= 381CFM

Airflow

18

22

24

14

10

1.8

1.9

1.7

15 25 35 45 55

1.5

1.3

1.4

1.6

I

n

d

o

o

r

in

t

a

k

e

a

ir

D

B

t

e

m

p

e

r

a

t

u

r

e

(

°

F

)

Indoor intake air D

B tem

perature (

°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

65
70
75

75
70
65

24

20

12

16

I

n

d

o

o

r

in

t

a

k

e

a

ir

D

B

t

e

m

p

e

r

a

t

u

r

e

(

°

F

)

= 381CFM

Airflow

15 25 35 45 55

Outdoor intake air WB temperature (°F)

2.4

1.4

1.6

1.8

2.0

2.2

Indoor intake air DB temperature (

°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

65
70
75

75
70
65

28
26
24
22

16
14

20
18

2.6

1.6

Indoor intake air DB temperature (

°F)

= 431CFM

Airflow

15 25 35 45 55

Outdoor intake air WB temperature (°F)

1.8

2.0

2.2

2.4

Indoor intake air DB temperature (°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

71
67
63

71
67
63

Outdoor intake air DB temperature (°F)

SHF at rating condition = 0.71

= 275CFM

Airflow

6

8
7

9

10

11

12

0.9

65 75 85 95 105 115

0.7

0.6

0.8

In

d

o

o

r

in

ta

k

e

a

ir W

B

te

m

p

e

r

a

tu

r

e

(

°

F

)

Indoor intake air WB temperature (

°F)

0.5

0.4

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

71
67
63

71
67
63

24
22
20
18

12

16
14

2.5

2.3

2.1

1.9

1.7

1.5

In

d

o

o

r in

ta

k

e

a

ir W

B

te

m

p

e

ra

tu

re

(

°F

)

In

do

or in

ta

ke air W

B

te

m

pe

ra

tu

re (

°F

)

SHF at rating condition = 0.65

= 342CFM

Airflow

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

71
63

67

71
63

67

27

29

23

19

25

21

17

3.1

2.9

2.7

2.5

2.3

2.1

Indoor intake air W

B

tem

perature (

°F)

Indoor intake air WB temperature (

°F)

SHF at rating condition = 0.63

= 385CFM

Airflow

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

71

67

63

71
67
63

15

13

9

11

1.4

1.3

1.2

1.1

1.0

0.9

Indoor intake air WB temperature (

°F)

In

d

oo

r in

ta

k

e

a

ir W

B

te

m

pe

ra

tu

re

(

°F

)

SHF at rating condition = 0.70

= 318CFM

Airflow

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

71
67
63

71
67
63

22

18

10

14

2.2

2.0

1.8

1.6

1.4

1.2

In

d

o

o

r in

ta

k

e

a

ir W

B

te

m

p

e

ra

tu

re

(

°

F

)

In

d

o

or in

ta

ke

a

ir W

B

te

m

p

e

ra

tu

re (

°F

)

SHF at rating condition = 0.65

= 342CFM

Airflow

65 75 85 95 105 115

Outdoor intake air DB temperature (°F)

Total power consumption

(kW)

Total capacity

( ✕10

3

Btu/h)

Cooling

MSZ-A09NA MSZ-A12NA

MSZ-A15NA MSY-A15NA

Heating

MSZ-A17NA MSY-A17NA

MSZ-A09NA

MSZ-A24NA MSY-A24NA

MSZ-A12NA

MSZ-A15NA

MSZ-A17NA

This value of frequency is not the same as the actual frequency in operating. Refer to 7-6 and 7-7 for the relationships
between frequency and capacity.

MSZ-A24NA

19

7-3. Condensing pressure

68 70 75 80 85 90 95 100 105

(°F)

110

115

120

125

130

135

140

145

150

155

160

165

170

(PSIG)

Condensing pressure

86
80
75
70

Suction pressure

Outdoor ambient temperature

Indoor DB temperature (

°F)

(PSIG)

86

80
75

70

68 70 75 80 85 90 95 100 105

(°F)

260

280

300

320

340

360

380

400

420

Indoor DB temperature (

°F)

Outdoor ambient temperature

68 70 75 80 85 90 95 100 105

(°F)

90

95

100

105

110

115

120

125

130

135

140

145

150

(PSIG)

Condensing pressure

86
80
75
70

Suction pressure

Outdoor ambient temperature

Indoor DB temperature (

°F)

(PSIG)

86

80
75

70

68 70 75 80 85 90 95 100 105

(°F)

180

220

260

300

340

380

420

460

500

Indoor D

B

tem

perature (

°F

)

Outdoor ambient temperature

68 70 75 80 85 90 95 100 105(°F)

80

85

90

95

100

105

110

115

120

125

130

135

140

(PSIG)

Condensing pressure

86
80
75
70

Suction pressure

Outdoor ambient temperature

Indoor DB temperature (°F)

(PSIG)

86

80
75

70

68 70 75 80 85 90 95 100 105(°F)

260

300

340

380

420

460

500

540

580

Indoor DB temperature (

°F)

Outdoor ambient temperature

Cooling

Data is based on the condition of indoor humidity 50%.
Air flow should be set to High speed.

MSZ-A09NA

MSZ-A12NA

MSZ-A15NA
MSY-A15NA

20

68 70 75 80 85 90 95 100 105(°F)

70

75

80

85

90

95

100

105

110

115

120

125

130

(PSIG)

Condensing pressure

86
80
75
70

Suction pressure

Outdoor ambient temperature

Indoor DB temperature (

°F)

(PSIG)

86
80

75
70

68 70 75 80 85 90 95 100 105(°F)

260

300

340

380

420

460

500

540

580

Indoor D

B tem

perature (

°F

)

Outdoor ambient temperature

MSZ-A17NA

(PSIG)

Condensing pressure

86
80
75
70

68 70 75 80 85 90 95 100 105(°F)

80

85

90

95

100

105

110

115

120

125

130

135

140

Suction pressure

Outdoor ambient temperature

Indoor DB temperature (

°F)

(PSIG)

86
80

75
70

68 70 75 80 85 90 95 100 105(°F)

260

300

340

380

420

460

500

540

580

Indoor DB temperature (

°F)

Outdoor ambient temperature

MSY-A17NA

MSZ-A24NA
MSY-A24NA

21

Heating

75
70

65

(PSIG) (PSIG)

Condensing pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55 60 65 70(°F)

340
320
300
280
260
240

360

380

400

440
420

460

480

Indoor DB temperature(

°F)

75
70
65

Suction pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55

58Hz

58Hz

60 65 70(°F)

70
60

80

90

100

110

120

130

140

150

160

170

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(

°

F

)

75
70
65

(PSIG) (PSIG)

Condensing pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55 60 65 70(°F)

260
220
180
140
100

300

340

380

460
420

500

540

580

620

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(°

F

)

75
70
65

Suction pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55

58Hz

58Hz

60 65 70(°F)

70
60
50

80

90

100

110

120

130

140

150

160

In

d

o

o

r

D

B

te

m

p

e

ra

tu

re

(

°

F

)

75

70
65

(PSIG) (PSIG)

Condensing pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55 60 65 70(°F)

340
320
300
280
260
240

360

380

400

440
420

460

480

Indoor DB temperature(

°F)

75
70
65

Suction pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55

58Hz

58Hz

60 65 70(°F)

70
60

80

90

100

110

120

130

140

150

160

170

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(

°

F

)

Data is based on the condition of outdoor humidity 75%.
Air flow should be set to High speed.
Data is for heating operation without any frost.

MSZ-A09NA

MSZ-A12NA

MSZ-A15NA

22

MSZ-A17NA

75

70
65

(PSIG) (PSIG)

Condensing pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55 60 65 70(°F)

260
220
180
140
100

300

340

380

460
420

500

540

580

620

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(°

F

)

75
70
65

Suction pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55

58Hz

58Hz

60 65 70(°F)

70
60
50

80

90

100

110

120

130

140

150

160

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(

°

F

)

75
70

65

(PSIG) (PSIG)

Condensing pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55 60 65 70(°F)

280
260
240
220
200

300

320

340

380
360

400

420

440

460

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(°

F

)

75
70
65

Suction pressure

Outdoor ambient temperature

14 20 25 30 35 40 45 50 55

58Hz

60 65 70(°F)

70
60
50

80

90

100

110

120

130

140

150

160

In

d

o

o

r D

B

te

m

p

e

ra

tu

re

(

°

F

)

58Hz

MSZ-A24NA

23

7-4. STANDARD OPERATION DATA

Capacity
SHF
Input
Rated frequency
Indoor unit
Power supply (V, phase, Hz)
Input
Fan motor current
Aux. heater current
Outdoor unit
Power supply (V, phase, Hz)
Input
Comp. current
Fan motor current
Condensing pressure
Suction pressure
Discharge temperature
Condensing temperature
Suction temperature
Comp. shell bottom temp
Ref. pipe length
Refrigerant charge (R410A)

Intake air temperature

Discharge air temperature

Fan speed (High)
Airflow (High)

Intake air temperature

Fan speed
Airflow

Unit

Btu / h

—

kW

Hz

kW

A
A

kW

A

A
PSIG
PSIG

˚F
˚F
˚F
˚F
ft.
—
˚F
˚F
˚F
˚F

rpm

CFM

˚F
˚F

rpm

CFM

Cooling

9,000

0.71

0.690
50

0.674

2.80 / 2.53

363
144
145
107

55

140

80
67
57
56

1,080

275 (Wet)

95

–

840

1,094

Cooling

12,000

0.70

1,170

76

1.149

5.08 / 4.59

395
124
169
112

54

163

80
67
56
54

1,220

318 (Wet)

95

–

840

1,094

Heating

10,900

–

0.860
61

0.844

3.63 / 3.28

368
109
153
108

37

147

70
60

105

71

1,080

307

47
43

840

1,094

Heating

13,600

–

1,160

76

1.139

5.03 / 4.54

393
103
164
113

35

158

70
60

108

72

1,220

353

47
43

840

1,094

DB

WB

DB

WB

DB

WB

Item

Model

Total

Electrical
circuit

Refrigerant
circuit

Indoor
unit

Outdoor
unit

MSZ-A09NA

MSZ-A09NA

208/230, 1, 60

0.016

0.18 / 0.16
–

MUZ-A09NA

208/230, 1, 60

0.37 / 0.34

25

2lb.5oz.

MSZ-A12NA

MSZ-A12NA

208/230, 1, 60

0.021

0.23 / 0.21
–

MUZ-A12NA

208/230, 1, 60

0.37 / 0.34

25

2lb.5oz.

24