Mitsubishi MUZ-GL09NA-U8, MUZ-GL09NAH-U8, MUY-GL09NA-U1, MUZ-GL09NAH-U1, MUZ-GL12NA-U1 Service Manual

HFC

utilized

R410A

INDOOR UNIT

OUTDOOR UNIT

SERVICE MANUAL

Models

Revision D:

• MUZ-GL24NAH-U1 has been added.

OBH733 REVISED EDITION-C is void.

No. OBH733

REVISED EDITION-D

MUZ-GL09NA MUZ-GL09NA MUZ-GL12NA MUZ-GL15NA MUZ-GL18NA MUZ-GL24NA -

U1

MUZ-GL09NAH -

U8

MUZ-GL09NAH -

U1

MUZ-GL12NAH -

U1

MUZ-GL15NAH -

U1

MUZ-GL18NAH -

U1

MUZ-GL24NAH -

CONTENTS

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

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

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

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

5. WIRING DIAGRAM ············································ 9

6. REFRIGERANT SYSTEM DIAGRAM ············· 21

7. DATA ································································ 25

8. ACTUA TOR CONTROL ··································· 39

9. SERVICE FUNCTIONS ··································· 40

10. TROUBLESHOOTING ····································· 41

11. DISASSEMBLY INSTRUCTIONS ···················· 64

U1

MUY-GL09NA -

U8

U1

MUY-GL12NA -

U1

MUY-GL15NA -

U1

MUY-GL18NA -

U1

MUY-GL24NA -

Indoor unit service manual MSZ-GL•NA, MSY-GL•NA Series (OBH732)

U1

MUZ-GL18/24NA MUZ-GL18/24NAH MUY-GL18/24NA

NOTE:

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

PARTS CATALOG (OBB733)

Use the speciﬁ ed refrigerant only

OBH733D

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.

Revision A:

• MUZ-GL12/15NA-U1, MUZ-GL12/15NAH-U1 and MUY-GL09/12/15NA-U1 have been added.

Revision B:

• MUZ-GL09NA-U8 and MUZ-GL09NAH-U8 have been added.

Revision C:

U1

and

• MUZ-GL09NA-

MUZ-GL09NAH-

Revision D:

• MUZ-GL24NAH-U1 has been added.

1

MUZ-GL09NA MUZ-GL09NA MUZ-GL12NA MUZ-GL15NA

MUZ-GL18NA MUZ-GL24NA

1. New model

TECHNICAL CHANGES

U1

-

MUZ-GL09NAH

U8

MUZ-GL09NAH

U1

MUZ-GL12NAH

U1

MUZ-GL15NAH

U1

MUZ-GL18NAH

U1

MUZ-GL24NAH

U1

have been added.

U1

-

U8

-

U1

-

U1

-

U1

-

U1

-

MUY-GL09NA MUY-GL12NA

MUY-GL15NA MUY-GL18NA MUY-GL24NA

U1

-

U1

-

U1

-

U1

-

U1

-

2

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

2

OBH733D

PART NAMES AND FUNCTIONS

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

Air inlet

(back and side)

Piping

Air outlet

Drain hose

Drain outlet

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA

3

OBH733D

SPECIFICATION

Outdoor unit model

Capacity

Rated (Minimum~Maximum)

1

[SEER]

4

Capacity

Rated (Maximum)

Power consumption

Rated (Minimum~Maximum)

Power consumption

Rated (Maximum)

EER

HSPF IV

Cooling 1

Heating 47 1 (MUZ)

Heating 17 2 (MUZ)

Cooling 1

Heating 47 1 (MUZ)

Heating 17 2 (MUZ)

3

Cooling 15.4 [24.6] 13.0 [23.1]

Heating

(MUZ)

COP Heating 1

Power factor

Cooling (208/230)

(MUZ) (208/230)

Heating

(MUZ)

MUZ-

GL09NA-

MUZ-

GL09NAH-

U1

MUZ-

GL09NA-

MUZ-

GL09NAH-

U8

MUY-

GL09NA

U8

Btu/h 9,000 (3,600 - 12,200)

Btu/h

10,900

(4,500 - 15,900)

6,700

(10,200)

10,900

(4,500 - 14,100)

7,000

(9,400)

-

W 585 (240 - 1,050) 920 (100 - 1,300)

W

720

(230 - 1,250)

630

(1,060)

NA: 12.8

NAH: 11.8

4.44

720

(230 - 1,070)

620

(790)

-

% 86/86 92/92 87/87 95/95 % 90/90 95/95

-

MUZ-

GL12NA

MUZ-

MUY-

GL12NA

GL12NAH

12,000 (1,500 - 13,600)

14,400

(2,000 - 18,100)

9,200

(12,000)

1,100

(110 - 1,620)

870

(1,240)

NA: 12.5

NAH: 11.5

3.84

96/96 Power supply V , phase , Hz 208/230, 1 , 60 Max. fuse size (time delay) A 15 Min. circuit ampacity A 9 7 9 7 Fan motor F.L.A A 0.50

Compressor

Model R.L.A A 6.2 4.9 6.6 4.9 L.R.A A 7.7 6.1 8.2 6.1 Refrigeration oil

ﬂ oz. (L) (Model)

KNB073FRVMC SNB092FQAMT KNB073FRVMC

9.1 (0.27)/(FV50S)

11.8 (0.35)/(FV50S)

9.1 (0.27)/(FV50S)

SNB092FQAMT

11.8 (0.35)/(FV50S)

Refrigerant control Linear expansion valve

Sound level 1

Airﬂ ow High - Med. - Low

Fan speed High - Med. - Low

Cooling dB(A) 48 49 49 Heating

(MUZ)

dB(A) 50

-

51 Cooling CFM 1,102 - 639 Heating

(MUZ)

CFM

1,186 - 1,116 - 1,045

-

1,186 - 1,116 - 1,045

Cooling rpm 810 - 490

Heating (MUZ) rpm

870 - 820 - 770

-

870 - 820 - 770

Defrost method Reverse cycle

W in. 31-1/2

Dimensions

D in. 11-1/4 H in. 21-5/8

Weight Ib. 81 External ﬁ nish Munsell 3Y 7.8/1.1 Remote controller Wireless type Control voltage

(by built-in transformer)

VDC 12 - 24 Refrigerant piping Not supplied Refrigerant pipe size

(Min. wall thickness)

Connection method

Between the indoor & outdoor units

Liquid in. 1/4 (0.0315) Gas in. 3/8 (0.0315) Indoor Flared Outdoor Flared Height difference ft. 40 Piping length ft. 65

Refrigerant charge (R410A) 2 lb. 5 oz. 2 lb. 9 oz.

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

1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB) (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB

2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB 3: Test condition (Refer to page 6.) 4: Test condition (Refer to page 6.)

4

-

Outdoor unit model

OBH733D

Capacity

Rated (Minimum~Maximum)

Capacity

Rated (Maximum)

Power consumption

Rated (Minimum~Maximum)

Power consumption

Rated (Maximum)

EER

HSPF IV

1

[SEER] 3 Cooling 13.0 [21.6] 13.4 [20.5] 12.5 [20.5]

4

Cooling 1 Heating 47 1 (MUZ)

Heating 17 2 (MUZ)

Cooling 1 Heating 47 1 (MUZ)

Heating 17 2 (MUZ)

Heating

(MUZ)

COP Heating 1

Power factor

Cooling (208/230)

(MUZ) (208/230)

Heating

(MUZ)

MUZ-

GL18NA

MUZ-

MUY-

GL18NA

GL18NAH

18,000 (5,800 ~ 22,000) 22,500 (8,200 ~ 31,400)

21,600

(5,400 ~ 25,000)

-

Btu/h

MUZ-

GL15NA

MUZ-

MUY-

GL15NA

GL15NAH

14,000 (3,100 - 18,200)

18,000

(4,800 - 20,900)

12,200

(16,400)

-

- 13,800 (18,200) - 16,000 (24,600)

W 1,080 (210 - 2,000) 1,295 (285 ~ 2,105) 1,742 (560 ~ 3,522)

W

1,600

(2,010)

1,190

(1,850)

NA: 11.7

NAH: 10.8

3.30

-

1,635 (275 ~ 2,455) 2,282 (508 ~ 3,592)

1,435

(2,105)

NA: 11.2

NAH: 10.2

3.77

-

% 97/97 99/99 99/99 % 98/98 99/99

-

MUZ-

GL24NA

MUZ-

GL24NAH

27,600

(7,500 ~ 36,900)

1,712

(3,232)

NA: 10.0

NAH: 10.0

3.46

99/99 Power supply V , phase , Hz 208/230, 1 , 60 Max. fuse size (time delay) A 15 20 Min. circuit ampacity A 10 9 14 17.1 Fan motor F.L.A 0.50 0.93 0.93

Model SNB130FQBMT SNB130FQBMT SNB172FQKMT

Compressor

R.L.A A 7.4 6.8 10 12.9 L.R.A A 9.3 8.5 12.5 16.1 Refrigeration oil

ﬂ oz. (L) (Model)

11.8 (0.35)/(FV50S)

11.8 (0.35)/(FV50S) 11.8 (0.35)/(FV50S) 13.5 (0.40)/(FV50S)

Refrigerant control Linear expansion valve

Sound level 1

Airﬂ ow High - Med. - Low

Fan speed High - Med. - Low

Cooling dB(A) 49 49 54 55 Heating

(MUZ)

dB(A) 51

-

55

-

55 COOL CFM 1,102-639 1,742 - 922 2,016 - 1,769 - 890 HEAT CFM

1,186 - 1,045 - 1,045

-

1,691 - 1,691 - 1,372

-

1,701 - 1,701 - 1,341

Cooling rpm 810 - 490 840 - 450 950 - 840 - 450

Heating (MUZ) rpm

870 - 770 - 770

-

810 - 810 - 650

-

810 - 810 - 650

Defrost method Reverse cycle

W in. 31-1/2 33-1/16

Dimensions

D in. 11-1/4 13 H in. 21-5/8 34-5/8

Weight Ib. 81 121 119 External ﬁ nish Munsell 3Y 7.8/1.1 Remote controller Wireless type Control voltage

(by built-in transformer)

VDC 12 - 24

Refrigerant piping Not supplied

Refrigerant pipe size (Min. wall thickness)

Connection method

Between the indoor & outdoor units

Liquid in. 1/4 (0.0315) 3/8 (0.0315) Gas in. 1/2 (0.0315) 5/8 (0.0315) Indoor Flared Outdoor Flared Height difference ft. 40 50 Piping length ft. 65 100

Refrigerant charge (R410A) 2 lb. 9 oz. 3 lb. 9 oz. 4 lb. 3 oz.

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

1: Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB) (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB 2: (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB

5

MUY-

GL24NA

-

Test condition

OBH733D

3, 4

Mode Test

ARI

"A-2" Cooling Steady State at rated compressor Speed

"B-2" Cooling Steady State at rated compressor Speed

SEER

(Cooling)

HSPF

(Heating)

NOTE:

5

: At Intermediate compressor Speed

"B-1" Cooling Steady State at minimum compressor Speed

"F-1" Cooling Steady State at minimum compressor Speed

"E-V" Cooling Steady State at Intermediate compressor Speed

"H1-2" Heating Steady State at rated compressor Speed

"H3-2" Heating at rated compressor Speed

"H0-1" Heating Steady State at minimum compressor Speed

"H1-1" Heating Steady State at minimum compressor Speed

"H2-V" Heating at Intermediate compressor Speed

5

= ("Rated compressor speed" - "minimum compressor speed") / 3 + "minimum compressor speed".

Indoor air condition (°F) Outdoor air condition (°F)

Dry bulb Wet bulb Dry bulb Wet bulb

80 67 95 (75)

80 67 82 (65)

80 67 67 (53.5)

80 67 87 (69)

70 60 47 43

70 60 17 15

70 60 62 56.5

70 60 47 43

70 60 35 33

OPERATING RANGE

(1) POWER SUPPLY

Outdoor unit

(2) OPERATION

Mode Condition

Standard temperature 80 67 95 —

Cooling

Heating

Maximum temperature 90 73 115 — Minimum temperature 67 57 14 — Maximum humidity 78 % — Standard temperature 70 60 47 43 Maximum temperature 80 67 75 65 Minimum temperature 70 60 -4 -5

Rated voltage Guaranteed voltage (V)

208/230 V

1 phase

60 Hz

Min. 187

Indoor Outdoor

DB WB DB WB

208 230 Max. 253

Intake air temperature (°F)

6

4

clear *1

*1

4 in. (100 mm) or more when

front and sides of the unit are clear

*2

When any 2 sides of left, right

and rear of the unit are clear

holes

(GL09/12/15NA)

(GL09/12/15NAH)

REQUIRED SPACE

Liquid refrigerant pipe joint Refrigerant pipe (flared)

Ø 1/4

Gas refrigerant pipe joint Refrigerant pipe (flared)

Ø 3/8 (GL09/12) Ø 1/2 (GL15)

4 in. (100 mm)

or more

14 in. (350 mm)

or more

8 in. (200 mm)

or more *2

4 in. (100 mm)

or more

OBH733D

OUTLINES AND DIMENSIONS

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

Unit: inch

7

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA

OBH733D

MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA

REQUIRED SPACE

Unit: inch

Air in

13

34-5/8

2

17-25/32

6-7/8

16-7/16

Air in

19-11/16

4-5/16

Air out

33-1/16

*1 20 in. (500 mm) or more when front and sides of the unit are clear

Drain hole

1-9/16

1-5/8

14-3/16

2-holes 13/32 13/16

3-3/16

6-1/2

3-29/32

4 in. (100 mm)

or more

7-11/16

Clear *1

20 in. (500 mm)

or more *2

*2 When any 2 sides of left, right and rear of the unit are clear

Service panel

Liquid refrigerant pipe joint Refrigerant pipe (flared) Refrigerant pipe (flared)

35

44

Gas refrigerant pipe joint Refrigerant pipe (flared) Refrigerant pipe (flared)

4 in. (100 mm)

or more

14 in. (350 mm)

or more

Ø 1/4 (GL18) Ø 3/8 (GL24)

Ø 1/2 (GL18) Ø 5/8 (GL24)

8

5

OBH733D

MUZ-GL09NA MUZ-GL12NA

WIRING DIAGRAM

9

MUZ-GL09NAH MUZ-GL12NAH

OBH733D

10

MUY-GL09NA MUY-GL12NA

OBH733D

11

MUZ-GL15NA

OBH733D

12

MUZ-GL15NAH

OBH733D

13

MUY-GL15NA

OBH733D

14

MUZ-GL18NA

OBH733D

15

MUZ-GL18NAH

OBH733D

16

MUY-GL18NA

OBH733D

17

MUZ-GL24NA

OBH733D

18

MUZ-GL24NAH

OBH733D

19

MUY-GL24NA

OBH733D

20

6

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61 (MUZ)

Discharge temperature thermistor RT62

Flared connection

Stop valve (with strainar)

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating (MUZ)

Refrigerant pipe ø1/4 (ø6.35) (with heat insulator)

R.V. coil (MUZ) heating ON cooling OFF

Strainer #100

LEV

Ambient temperature thermistor RT65

Muffler

Capillary tube O.D. 0.118 × I.D. 0.079 × 9-7/16 (ø3.0 × ø2.0 × 240)

(MUZ-GL09NA/H -

U1 )

Outdoor heat exchanger temperature thermistor RT68

Capillary tube O.D. 0.118 × I.D. 0.079 × 8-9/32 (ø3.0 × ø2.0 × 210)

Service port

Refrigerant pipe ø3/8 (ø9.52) (GL09/12)

(with heat insulator)

ø1/2 (ø12.7) (GL15)

Stop valve (with service port)

Capillary tube O.D. 0.157 × I.D. 0.094 × 9-7/16 (ø4.0 × ø2.4 × 240)

(Other models

)

Muffler

OBH733D

REFRIGERANT SYSTEM DIAGRAM

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

Unit: Inch (mm)

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA

ø1/2 (ø

ø1/4 (ø

12.7)

Stop valve

6.35)

Stop valve (with service port)

Strainer

Refrigerant pipe (with heat insulator)

Flared connection

Refrigerant pipe (with heat insulator)

#100

4-way valve

Discharge

Service port

Muffler

temperature thermistor RT62

Compressor

Capillary tube

O.D. 0.157× I.D. 0.094× 3-15/16

(ø

4.0×ø

2.4×100)

Muffler with #100 mesh strainer

Service port

Capillary tube

O.D. 0.118× I.D. 0.079× 7-7/8

(ø3.0×ø2.0×200(×4))

LEV

Capillary tube

O.D. 0.157× I.D. 0.094×7-7/8

(ø

4.0×ø

Strainer

2.4×200)

21

#100

Outdoor

Defrost thermistor RT61 (MUZ)

Refrigerant flow in cooling Refrigerant flow in heating (MUZ)

heat exchanger

Outdoor heat exchanger temperature thermistor RT68

R.V. coil (MUZ) heating ON cooling OFF

MUZ-GL24NA MUY-GL24NA

OBH733D

Refrigerant pipe (with heat insulator)

Flared connection

Refrigerant pipe ø3/8 ( (with heat insulator)

ø

5/8 (

ø15.88)

Stop valve (with service port)

Stop valve

ø9.52)

4-way valve

Strainer

#100

Service port

Muffler with #100 mesh strainer

Discharge temperature thermistor RT62

Compressor

LEV

Capillary tube O.D.0.157

×

3-15/16

(ø

4.0

×

ø

2.4×100)

×

I.D.0.094

Service port

Defrost thermistor RT61 (MUZ)

Strainer

#100

Outdoor heat exchanger

Outdoor heat exchanger temperature thermistor RT68

R.V. coil (MUZ) heating ON cooling OFF

Refrigerant flow in cooling Refrigerant flow in heating (MUZ)

Ambient temperature thermistor RT65

MUZ-GL24NAH

Refrigerant pipe (with heat insulator)

Flared connection

Refrigerant pipe ø3/8 (with heat insulator)

ø

5/8 (

ø15.88)

Stop valve (with service port)

Stop valve

(

ø9.52)

Strainer #100

Capillary tube O.D.0.118

×

21-21/32

(ø

3.0

×

ø

1.8×550)

×

4-way valve

Service port

CHECK VALVE

I.D.0.071

Muffler

#100

Discharge temperature thermistor RT62

Compressor

Capillary tube O.D.0.157

×

3-15/16

(ø

4.0

×

ø

2.4×100)

×

Service port

LEV

I.D.0.094

Defrost thermistor RT61

Strainer

#100

Outdoor heat exchanger

Outdoor heat exchanger temperature thermistor RT68

R.V. coil heating ON cooling OFF

Refrigerant flow in cooling Refrigerant flow in heating

Ambient temperature thermistor RT65

22

Max. Length A

Max. Height

difference

B

Indoor unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

OBH733D

Refrigerant piping: ft. Piping size O.D: in.

Model

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA

MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA

MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA

Max. Length

Max. Height difference

A

65 40

100 50

B

Gas Liquid

3/8

1/2

5/8 3/8

1/4

ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)

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

U1

U8

Outdoor unit

precharged

2 lb. 5 oz.

2 lb. 9 oz.

Model

MUZ-GL09NA MUZ-GL09NAH -

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

Refrigerant piping length (one way): ft.

25 30 40 50 60 65

0 1.08 3.24 5.40 7.56 8.64

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

23

Mitsubishi MUZ-GL09NA-U8, MUZ-GL09NAH-U8, MUY-GL09NA-U1, MUZ-GL09NAH-U1, MUZ-GL12NA-U1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual