Mitsubishi Electric MUZ-GL09NA-U8 Manuale utente

HFC

utilized

R410A

INDOOR UNIT

SERVICE MANUAL

No. OBH733

REVISED EDITION-G

Indoor unit service manual

MSZ-GL•NA, MSY-GL•NA Series (OBH732)

MUZ-GL18/24NA

MUZ-GL18/24NAH

MUY-GL18/24NA

PARTS CATALOG (OBB733)

OBH733 REVISED EDITION-F is void.

Revision G:

• MUZ-GL09/12/15NA(H)- U2 and

MUY-GL09/12/15NA- U2 have been added.

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································································ 24

8. ACTUATOR CONTROL··································· 39

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

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

11. DISASSEMBLY INSTRUCTIONS ···················· 65

OUTDOOR UNIT

Models

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

1TECHNICAL CHANGES

Use the specied refrigerant only

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.

MUZ-GL09NA - U1 MUZ-GL09NAH - U1 MUY-GL09NA - U1

MUZ-GL09NA - U8 MUZ-GL09NAH - U8

MUZ-GL12NA - U1 MUZ-GL12NAH - U1 MUY-GL12NA - U1

MUZ-GL15NA - U1 MUZ-GL15NAH - U1 MUY-GL15NA - U1

MUZ-GL18NA - U1 MUZ-GL18NAH - U1 MUY-GL18NA - U1

MUZ-GL24NA - U1 ,U2 MUZ-GL24NAH - U1 MUY-GL24NA - U1

1. New model

Revision B:

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

Revision C:

• MUZ-GL09NA- U1 and MUZ-GL09NAH- U1 have been added.

Revision D:

• MUZ-GL24NAH- U1 has been added.

Revision E:

• Capacity corrections have been corrected [7-1. 2), 3)].

Revision F:

• MUZ-GL24NA- U2 has been added.

Revision G:

• MUZ-GL09/12/15NA(H)- U2 and MUY-GL09/12/15NA- U2 have been added.

MUZ-GL09NA - U1 MUZ-GL09NA - U2

MUZ-GL09NAH - U1 MUZ-GL09NAH - U2

1. Fan motor has been changed.

2. INVERTER P.C.BOARD has been changed.

3. EXPANSION VALVE has been changed.

4. 4-WAY VALVE has been changed.

5. R.V. COIL has been changed.

6. Compressor has been changed.

MUZ-GL12NA - U1 MUZ-GL12NA - U2

MUZ-GL12NAH - U1 MUZ-GL12NAH - U2

1. Fan motor has been changed.

2. INVERTER P.C.BOARD has been changed.

3. EXPANSION VALVE has been changed.

4. 4-WAY VALVE has been changed.

5. R.V. COIL has been changed.

MUY-GL09NA - U1 MUY-GL09NA - U2

1. Fan motor has been changed.

2. INVERTER P.C.BOARD has been changed.

3. EXPANSION VALVE has been changed.

4. 4-WAY VALVE has been changed.

5. Compressor has been changed.

6. Refrigerant charge has been changed.

MUY-GL12NA - U1 MUY-GL12NA - U2

1. Fan motor has been changed.

2. INVERTER P.C.BOARD has been changed.

3. EXPANSION VALVE has been changed.

4. 4-WAY VALVE has been changed.

MUZ-GL15NA - U1 MUZ-GL15NA - U2

MUZ-GL15NAH - U1 MUZ-GL15NAH - U2

MUY-GL15NA - U1 MUY-GL15NA - U2

1. Fan motor has been changed.

2. INVERTER P.C.BOARD has been changed.

3. EXPANSION VALVE has been changed.

OBH733G

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA

MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

PART NAMES AND FUNCTIONS

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA

MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA

MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

OBH733G

Unit: inch

16-7/16

1-9/16

1-5/8

Drain hole

6-7/8 19-11/16

Air in

Air out

2-holes 13/32 13/16

14-3/16

33-1/16

4-5/16

3-3/16

34-5/8

17-25/32

Service panel

3-29/32

6-1/2

7-11/16

Liquid refrigerant pipe joint

Refrigerant pipe (flared) Ø 1/4 (GL18)

Refrigerant pipe (flared) Ø 3/8 (GL24)

Gas refrigerant pipe joint

Refrigerant pipe (flared) Ø 1/2 (GL18)

Refrigerant pipe (flared) Ø 5/8 (GL24)

*1 20 in. (500 mm) or more when front

and sides of the unit are clear

14 in. (350 mm)

or more

4 in. (100 mm)

or more

REQUIRED SPACE

Clear *1

4 in. (100 mm)

or more

20 in. (500 mm)

or more *2

*2 When any 2 sides of left, right

and rear of the unit are clear

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA

MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA

OBH733G

MUZ-GL18NA

OBH733G

MUZ-GL18NAH

OBH733G

6REFRIGERANT SYSTEM DIAGRAM

Unit: Inch (mm)

MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA

Outdoor

heat

exchanger

Flared connection

Defrost

thermistor

RT61

(MUZ)

Discharge

temperature

thermistor

RT62

Flared connection

Stop valve

Capillary tube

O.D. 0.157×

I.D. 0.094×

3-15/16

(ø

4.0

2.4

100)

Capillary tube

O.D. 0.157×

I.D. 0.094×7-7/8

(ø

4.0

2.4

200)

Refrigerant flow in cooling

Compressor

4-way

valve

Refrigerant flow in heating (MUZ)

Refrigerant pipe

ø1/2

(

12.7)

(with heat insulator)

Refrigerant pipe

ø1/4

(

6.35)

(with heat insulator)

LEV

R.V. coil (MUZ)

heating ON

cooling OFF

Muffler

with #100 mesh strainer

Strainer

#100

Outdoor heat

exchanger

temperature

thermistor

RT68

Strainer

#100

Muffler

Capillary tube

O.D. 0.118×

I.D. 0.079× 7-7/8

(ø3.0×ø2.0×200(×4))

Stop valve

(with service port)

Service

port

Service port

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 , U2

MUY-GL09NA- U2 )

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

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

MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA

MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA

MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA

OBH733G

Max. Length

Max. Height

difference

Indoor

unit

Outdoor unit

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

Model

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

Max. Length

Max. Height difference

B Gas Liquid

MUZ-GL09NA

MUZ-GL09NAH

MUY-GL09NA

MUZ-GL12NA

MUZ-GL12NAH

MUY-GL12NA

65 40 3/8 1/4

MUZ-GL15NA

MUZ-GL15NAH

MUY-GL15NA

65 40 1/2 1/4

MUZ-GL18NA

MUZ-GL18NAH

MUY-GL18NA

100 50 1/2 1/4

MUZ-GL24NA

MUZ-GL24NAH

MUY-GL24NA

100 50 5/8 3/8

ADDITIONAL REFRIGERANT CHARGE (R410A: oz.)

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

Model Outdoor unit

precharged

Refrigerant piping length (one way): ft.

25 30 40 50 60 65

MUZ-GL09NA

MUZ-GL09NAH

MUY-GL09NA

2 lb. 5 oz.

0 1.08 3.24 5.40 7.56 8.64

MUZ-GL09NA

MUZ-GL09NAH

MUY-GL09NA

MUZ-GL12NA

MUZ-GL12NAH

MUY-GL12NA

MUZ-GL15NA

MUZ-GL15NAH

MUY-GL15NA

2 lb. 9 oz.

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

OBH733G

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

Model Outdoor unit

precharged

Refrigerant piping length (one way): ft.

25 30 40 50 60 70 80 90 100

MUZ-GL18NA

MUZ-GL18NAH

MUY-GL18NA

3 lb. 9 oz. 0 1.08 3.24 5.40 7.56 9.72 11.88 14.04 16.20

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

NOTE: Refrigerant piping exceeding 33 ft. requires additional refrigerant charge according to the calculation.

Model Outdoor unit

precharged

Refrigerant piping length (one way): ft.

33 40 50 60 70 80 90 100

MUZ-GL24NA

MUZ-GL24NAH

MUY-GL24NA

4 lb. 3 oz. 0 4.14 10.06 15.98 21.90 27.82 33.74 39.66

Calculation: X oz. = 2.96/5 oz./ft. × (Refrigerant piping length (ft.) - 33)

DATA7

7-1. PERFORMANCE DATA

1) COOLING CAPACITY

Model

Indoor air

Outdoor intake air DB temperature (˚F)

IWB (˚F) 75 85 95 105 115

TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC

MUZ-GL09NA

MUZ-GL09NAH

MUY-GL09NA

71 11.0 7.6 0.52 10.3 7.1 0.57 9.7 6.6 0.61 9.0 6.2 0.65 8.3 5.7 0.67

67 10.4 8.6 0.49 9.7 8.0 0.54 9.0 7.4 0.59 8.4 6.9 0.62 7.7 6.3 0.65

63 9.8 9.4 0.47 9.1 8.7 0.52 8.5 8.1 0.56 7.7 7.3 0.60 7.0 6.7 0.62

MUZ-GL12NA

MUZ-GL12NAH

MUY-GL12NA

71 14.7 9.4 0.82 13.7 8.7 0.90 12.9 8.2 0.97 12.0 7.6 1.02 11.0 7.0 1.06

67 13.9 10.7 0.77 13.0 10.0 0.85 12.0 9.2 0.92 11.2 8.6 0.98 10.3 7.9 1.02

63 13.1 11.8 0.74 12.1 10.9 0.81 11.3 10.2 0.88 10.3 9.3 0.94 9.4 8.5 0.98

MUZ-GL15NA

MUZ-GL15NAH

MUY-GL15NA

71 17.2 9.7 0.96 16.0 9.1 1.05 15.1 8.5 1.13 14.0 7.9 1.19 12.9 7.3 1.24

67 16.2 11.4 0.91 15.1 10.6 1.00 14.0 9.8 1.08 13.0 9.1 1.14 12.0 8.4 1.20

63 15.3 12.7 0.86 14.1 11.8 0.96 13.2 11.0 1.03 12.0 10.0 1.10 10.9 9.1 1.14

MUZ-GL18NA

MUZ-GL18NAH

MUY-GL18NA

71 22.1 16.2 1.19 20.6 15.2 1.31 19.4 14.3 1.41 18.0 13.3 1.48 16.6 12.2 1.54

67 20.9 18.2 1.13 19.4 16.9 1.24 18.0 15.7 1.34 16.7 14.6 1.42 15.4 13.4 1.49

63 19.6 19.7 1.07 18.2 18.2 1.19 16.9 17.0 1.28 15.4 15.4 1.37 14.0 14.1 1.42

MUZ-GL24NA

MUZ-GL24NAH

MUY-GL24NA

71 27.6 17.0 1.60 25.8 15.9 1.76 24.2 14.9 1.89 22.5 13.9 1.99 20.7 12.8 2.07

67 26.1 19.6 1.51 24.3 18.2 1.67 22.5 16.9 1.80 20.9 15.7 1.91 19.2 14.4 2.00

63 24.5 21.7 1.44 22.7 20.1 1.59 21.2 18.7 1.72 19.2 17.0 1.84 17.6 15.5 1.91

NOTE: 1. IWB : Intake air wet-bulb temperature TC : Total Capacity (x103Btu/h)

SHC : Sensible Heat Capacity (x103Btu/h) TPC : Total Power Consumption (kW)

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

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

OBH733G

2) COOLING CAPACITY CORRECTIONS

Refrigerant piping length (one way: ft.)

25 (std.) 40 65 100

MUZ-GL09NA

MUZ-GL09NAH

MUY-GL09NA

MUZ-GL12NA

MUZ-GL12NAH

MUY-GL12NA

MUZ-GL15NA

MUZ-GL15NAH

MUY-GL15NA

1.0 0.988 0.967 -

MUZ-GL18NA

MUZ-GL18NAH

MUY-GL18NA

1.0 0.985 0.963 0.933

MUZ-GL24NA

MUZ-GL24NAH

MUY-GL24NA

1.0 0.983 0.956 0.921

3) HEATING CAPACITY CORRECTIONS

Refrigerant piping length (one way: ft.)

25 (std.) 40 65 100

MUZ-GL09NA

MUZ-GL09NAH

MUZ-GL12NA

MUZ-GL12NAH

MUZ-GL15NA

MUZ-GL15NAH

1.0 0.997 0.993 -

MUZ-GL18NA

MUZ-GL18NAH

MUZ-GL24NA

MUZ-GL24NAH

1.0 0.997 0.993 0.987

OBH733G

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