Mitsubishi MUZ-GB50VA User Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

OUTDOOR UNIT

HFC

utilized

R410A

SERVICE MANUAL

Wireless type Models

Revision A:

• Compressor has been Changed.

Please void OB455.

No. OB455

REVISED EDITION-A

MUZ-GB50VA -

Indoor unit service manual MSZ-GB·VA Series (OB454) Refrigerant service manual

R410A REFRIGERANT (OBR01)

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES·······························5

5. OUTLINES AND DIMENSIONS·························6

6. WIRING DIAGRAM ············································7

7. REFRIGERANT SYSTEM DIAGRAM················8

8. PERFORMANCE CURVES································9

9. ACTUA TOR CONTROL····································14

10. TROUBLESHOOTING ······································15

11. DISASSEMBLY INSTRUCTIONS·····················34

12. RoHS PARTS LIST···········································38

NOTE:

• This service manual describes technical data of the outdoor units.

Revision A:

• Compressor has been changed.

Model Previous New

SNB130FLDH

SNB130FLDH1

RoHS PARTS LIST number E12 851 900 E12 939 900

MUZ-GA50VA - ➔ MUZ- GB50VA -

1. Refrigerant filling capacity has been changed.

2. Outdoor electronic control P.C. board has been changed.

TECHNICAL CHANGES

E1E1

Air inlet

Piping

Air outlet

(back and side)

Drain hose

Drain outlet

Outdoor model

Function

Power supply

Capacity Rated frequency(Min.-Max.) Dehumidification Air flow ✽1

(High/Low) Power outlet Running current ✽1 Power input ✽1 Power factor ✽1 Starting current ✽1 Compressor motor current ✽1 Fan motor current ✽1

Model Output Winding resistance(at 20:) Model

Winding resistance(at 20:)

Dimensions WOHOD Weight Sound level ✽1

(High/Low) Fan speed (High/Low) Fan speed regulator Refrigerant filling capacity(R410A) Refrigeration oil (Model)

r/h

K /h

A W %

✽1

dB(A)

rpm

Compressor

Fan

motor

Special

remarks

Capacity

Electrical

data

Coefficient of performance(C.O.P)

Single phase

230V,50Hz

7.46

0.32

SNB130FLDH or SNB130FLDH1

850

U-V 0.45 W-U 0.45

V-W 0.45

RC0J60-AA

BLK-WHT 15.2

WHT-RED 15.2

RED-BLK 15.2

840o850o330

1.50

NEO22

Cooling

5.0(0.9-5.8)

2.5

2,940/1,650

7.23

1,610

6.91

3.03

52/51

800/480

Heating

5.8(0.9-7.8) —

2,940/2,210

7.43

1,660

7.11

3.41

55/53

800/620

MUZ-GB50VA

Drain socket Drain cap [33

1 2

MUZ-GB50VA

PART NAMES AND FUNCTIONS

MUZ-GB50VA

ACCESSORIES

NOTE : Test conditions are based on ISO 5151.

SPECIFICATION

Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19: Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15: Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency

Outdoor Dry-bulb temperature 35:Wet-bulb temperature 24: Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6:

Specifications and rating conditions of main electric parts

Model

Item

Current transformer Current transformer Smoothing capacitor Fuse Fuse Fuse Expansion valve coil Intelligent power module Intelligent power module Reactor Power factor controller Resistor Resistor Resistor Solenoid coil relay Terminal block Terminal block Relay R.V. coil

MUZ-GB50VA

(CT1,2)

(CT61)

(CB1,2,3)

(F64) (F801) (F911)

(LEV)

(IPM)

(HC930)

(L)

(PFC)

(R64A,B)

(R937A,B)

(RS1~4)

(SSR61)

(TB1) (TB2)

(X64)

(21S4)

ETQ19Z68AY ETQ19Z53AY

560+ 450V

250V 2A

250V 3.15A

250V 1A

CAM-MD12ME

PS21244-A

PS21661-RZ

340µH 20A

PS51259-A

10" 10W

1.1" 2W 2%

0.04" 7W TLP3506

3P 3P

G4A

LD30013

OUTDOOR UNIT

MICROPHONE

COOLING

FUNCTION

SPL(dB(A)) LINE

High

FAN SPEED

HEATING

52 55

63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

BAND CENTER FREQUENCIES, Hz

Test conditions, Cooling : Dry-bulb temperature 35: Wet-bulb temperature 24:

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

Heating : Dry-bulb temperature 7: Wet-bulb temperature 6:

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB=20µPa

NOISE CRITERIA CURVES

MUZ-GB50VA

30-

35-

155

198

515

299

330

360

850

430

500

121

840

Open as a rule 500mm or more if the front and both sides are open

100mm or more 200mm or more if there are obstacles to both sides

Open as a rule 500mm or more if the back, both sides and top are open

350mm or more

100mm or more

Service panel

Gas refrigerant pipe joint Refrigerant pipe (flared) [12.7

Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35

REQUIRED SPACE

OUTLINES AND DIMENSIONS

MUZ-GB50VA

OUTDOOR UNIT

Unit: mm

R64B

YLW

230V~

12-24V

CN912

CN663

WHT

BLU

NOISE

FILTER

P.C.BOARD

BRN

TO INDOOR

UNIT

CONNECTING

RED

RT65

CN61

GRN/YLW

PFC

GRN

LD9

POWER

BOARD

RT64

CN3

RED

WHT

RS2

RS1

R64A

RS3

RS4

F801

CN901

NR64

ELECTRONIC

CONTROL

P.C.BOARD

CB1

CB2

CB3

HC930

IPM

BLK

WHT

RED

YLW

BLU

ORN

PNK

GRY

BLU

WHT

GRN

BLU BLU

BLK

BLK BLK

BLK

RED

BLU

CT2

CT1

SSR61

CN7954123 78

CN661

CN4

TB2

CN601

1567

CN702

5321

CN781

CN701

CN931

LD1LD2

T801

R937A

R937B

CN801

23134512

CN932

3X64

5123

LDE2

CT61

TAB1

F64

F911

LDE1

21S4

POWER SUPPLY

~/N 230V 50Hz

TAB2

TB1

CIRCUIT

BREAKER

RED

YLW

RED

CN903

CN902

CN5

6543 1

CN2

TAB4

WHT

RT61 RT62 RT68

LEV

WIRING DIAGRAM

MUZ-GB50VA

OUTDOOR UNIT

diagram for servicing.

refer to the indoor unit electric wiring

1.About the indoor side electric wiringNOTES:

NAME

FIN TEMPERATURE THERMISTOR

RT64

SYMBOL

NAME

COMPRESSOR

SYMBOL

NAME

SMOOTHING CAPACITOR

CB1~3

SYMBOL

:Terminal block :Connector

3.Symbols below indicate.

2.Use copper conductors only (for field wiring).

TRANSFORMER

TERMINAL BLOCK

SOLENOID COIL RELAY

AMBIENT TEMPERATURE THERMISTOR

OUTDOOR HEAT EXCHANGER

TEMPERATURE THERMISTOR

T801

RT68

RT65

SSR61

VARISTOR

OUTDOOR FAN MOTOR

NOISE FILTER

RESISTOR

POWER FACTOR CONTROLLER

PFC

NR64

R64A,B

CURRENT TRANSFORMER

FUSE (T2AL 250V)

CURRENT TRANSFORMER

CT1, 2

FUSE (T1AL 250V)

FUSE (T3.15AL 250V)

F64

F911

F801

CT61

R.V. COIL

RELAY

X64

TB1

TB2

21S4

DEFROST THERMISTOR

DISCHARGE TEMPERATURE THERMISTOR

RESISTOR

RT62

RT61

RS1~4

R937A, B

EXPANSION VALVE COIL

REACTOR

INTELLIGENT POWER MODULE

IPM

LEV

HC930

Outdoor heat exchanger

Flared connection

Defrost thermistor RT61

Discharge temperature thermistor RT62

Flared connection

Stop valve

Stop valve (with service port)

Capillary tube [3.6✕[2.4✕50

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe [12.7 (with heat insulator)

Refrigerant pipe [6.35 (with heat insulator)

LEV

R.V. coil OFF ON

Muffler

#100

Strainer

#100

Receiver

Outdoor heat exchanger temperature thermistor RT68

Ambient temperature thermistor RT65

Strainer

#100

Max. length A

Max. Height

difference

Indoor unit

Outdoor unit

Max. length

Max. Height difference

Model

Gas

12.7

Liquid

6.35

Piping size O.D : mm

Refrigerant piping : m

MUZ-GB50VA

Model

MUZ-GB50VA

Refrigerant piping length (one way)

Outdoor unit

precharged

1,500

15m

160

20m

260

25m

360

30m

460

10m

REFRIGERANT SYSTEM DIAGRAM

MUZ-GB50VA

OUTDOOR UNIT

Unit:mm

MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE

ADDITIONAL REFRIGERANT CHARGE (R410A:g)

NOTE : Refrigerant piping exceeding 7m requires additional refrigerant charge according to the calculation.

Calculation : Xg=20g/m ✕ (Refrigerant piping length (m)–7)

PERFORMANCE CURVES8

MUZ-GB50VA

The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

207 ~ 253V, 50Hz

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature : °C [WB] (2) Indoor outlet air wet-bulb temperature : °C [WB] (3) Outdoor intake air dry-bulb temperature : °C [DB] (4) Total input: W (5) Indoor intake air dry-bulb temperature : °C [DB] (6) Outdoor intake air wet-bulb temperature : °C [WB] (7) Total input : W Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

How to measure the indoor air wet-bulb / dry-bulb temperature difference

1. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL (HEAT) MODE.

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

}

Cooling

Heating

INDOOR UNIT

Wet and dry-bulb thermometers

8-1. Capacity and input curves

8.7

8.0

7.3

6.6

difference (:)

5.9

5.3

Indoor air Wet-bulb temperature

r in

ir W

t-b

Outdoor intake air Dry-bulb temperature (:)

OUTDOOR UNIT

Wet and dry-bulb thermometers

)

(

)

Indoor intake air W

Outdoor intake air Dry-bulb temperature (:)

et-bulb tem

perature (

MUZ-GB50VA

MSZ-GB50VA

Rated frequency 79Hz

Indoor air Dry-bulb temperature

difference (

r in

-b

(

)

Outdoor intake air Wet-bulb temperature (:)

ir D

-b

(

)

24.1

22.3

20.4

18.5

16.7

14.8

13.0

11.1

Rated frequency 82Hz

MUZ-GB50VA

MSZ-GB50VA

NOTE:The above broken lines are for the heating operation without any

Capacity correction factors

Input correction factors

Capacity correction factors

Correction of Cooling capacity

The operational frequency of compressor

Correction of Cooling total input

The operational frequency of compressor

Correction of Heating total input

The operational frequency of compressor

Correction of Heating capacity

The operational frequency of compressor

MUZ-GB50VA

(Hz)

0 50 100 150

0.0

0.5

1.0

1.5

(Hz)

0 50 100 150

0.0

0.5

1.0

1.5

0 50 100 150

0.0

0.5

1.0

1.5

0 50 100 150

0.0

0.5

1.0

1.5

0 50 100 150

0.0

0.5

1.0

1.5

2.0

frost and defrost operation.

8-2. Capacity and input correction by operational frequency of compressor

8-3. TEST RUN OPERATION (How to operate fixed-frequency operation)

1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT : Press twice).

2. Test run operation starts and continues to operate for 30 minutes.

3. Compressor operates at rated frequency in COOL mode or 58Hz in HEAT mode.

4. Indoor fan operates at High speed.

5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor varies).

6. To cancel test run operation (EMERGENCY OPERATION), press EMERGENCY OPERATION switch or any button on remote controller.

8-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

Ambient temperature(˚C) Ambient humidity(%)

18 32

15 2050256030

70 (%)

35(˚C)

Ambient temperature(˚C) Ambient humidity(%)

18 32

15 2050256030

70 (%)

35(˚C)

79Hz

MUZ-GB50VA

(MPa [Gauge])

(kgf/F [Gauge])

79Hz

Outdoor low pressure

Outdoor unit current(A)

0.5

0.6

0.7

0.8

0.9

1.0

Dry bulb temperature (°C)

Indoor

20.0

14.521

Outdoor 7 6

151220.0

14.5

Wet bulb temperature (°C)

0 5 10 15 20 25(˚C)

Outdoor unit current (A)

Ambient temperature(˚C)

MUZ-GB50VA

58 Hz

NOTE: The unit of pressure has been changed to MPa based on the international system of units (SI unit system). The conversion factor is: 1(MPa [Gauge] = 10.2 (Kgf/

[Gauge])

COOL operation

1 Both indoor and outdoor unit are under the

same temperature/humidity condition.

2 Operation : TEST RUN OPERATION (refer to 8-3.)

HEAT operation

1 Condition :

Dry-bulb temperature(:)

20 25 30 70

Relative humidity(%)

50 60

2 Operation : TEST RUN OPERATION (refer to 8-3.)

21 18 5.88 3.00 0.51 1320 5.63 2.87 0.51 1386 5.40 2.75 0.51 1452 5.20 2.65 0.51 1518 21 20 6.13 2.39 0.39 1386 5.88 2.29 0.39 1469 5.70 2.22 0.39 1502 5.50 2.15 0.39 1568 22 18 5.88 3.23 0.55 1320 5.63 3.09 0.55 1386 5.40 2.97 0.55 1452 5.20 2.86 0.55 1518 22 20 6.13 2.63 0.43 1386 5.88 2.53 0.43 1469 5.70 2.45 0.43 1502 5.50 2.37 0.43 1568 22 22 6.38 1.98 0.31 1436 6.15 1.91 0.31 1526 6.00 1.86 0.31 1568 5.75 1.78 0.31 1634 23 18 5.88 3.47 0.59 1320 5.63 3.32 0.59 1386 5.40 3.19 0.59 1452 5.20 3.07 0.59 1518 23 20 6.13 2.88 0.47 1386 5.88 2.76 0.47 1469 5.70 2.68 0.47 1502 5.50 2.59 0.47 1568 23 22 6.38 2.23 0.35 1436 6.15 2.15 0.35 1526 6.00 2.10 0.35 1568 5.75 2.01 0.35 1634 24 18 5.88 3.70 0.63 1320 5.63 3.54 0.63 1386 5.40 3.40 0.63 1452 5.20 3.28 0.63 1518 24 20 6.13 3.12 0.51 1386 5.88 3.00 0.51 1469 5.70 2.91 0.51 1502 5.50 2.81 0.51 1568 24 22 6.38 2.49 0.39 1436 6.15 2.40 0.39 1526 6.00 2.34 0.39 1568 5.75 2.24 0.39 1634 24 24 6.70 1.81 0.27 1502 6.45 1.74 0.27 1584 6.30 1.70 0.27 1634 6.10 1.65 0.27 1716 25 18 5.88 3.94 0.67 1320 5.63 3.77 0.67 1386 5.40 3.62 0.67 1452 5.20 3.48 0.67 1518 25 20 6.13 3.37 0.55 1386 5.88 3.23 0.55 1469 5.70 3.14 0.55 1502 5.50 3.03 0.55 1568 25 22 6.38 2.74 0.43 1436 6.15 2.64 0.43 1526 6.00 2.58 0.43 1568 5.75 2.47 0.43 1634 25 24 6.70 2.08 0.31 1502 6.45 2.00 0.31 1584 6.30 1.95 0.31 1634 6.10 1.89 0.31 1716 26 18 5.88 4.17 0.71 1320 5.63 3.99 0.71 1386 5.40 3.83 0.71 1452 5.20 3.69 0.71 1518 26 20 6.13 3.61 0.59 1386 5.88 3.47 0.59 1469 5.70 3.36 0.59 1502 5.50 3.25 0.59 1568 26 22 6.38 3.00 0.47 1436 6.15 2.89 0.47 1526 6.00 2.82 0.47 1568 5.75 2.70 0.47 1634 26 24 6.70 2.35 0.35 1502 6.45 2.26 0.35 1584 6.30 2.21 0.35 1634 6.10 2.14 0.35 1716 26 26 6.90 1.59 0.23 1584 6.70 1.54 0.23 1667 6.60 1.52 0.23 1716 6.40 1.47 0.23 1766 27 18 5.88 4.41 0.75 1320 5.63 4.22 0.75 1386 5.40 4.05 0.75 1452 5.20 3.90 0.75 1518 27 20 6.13 3.86 0.63 1386 5.88 3.70 0.63 1469 5.70 3.59 0.63 1502 5.50 3.47 0.63 1568 27 22 6.38 3.25 0.51 1436 6.15 3.14 0.51 1526 6.00 3.06 0.51 1568 5.75 2.93 0.51 1634 27 24 6.70 2.61 0.39 1502 6.45 2.52 0.39 1584 6.30 2.46 0.39 1634 6.10 2.38 0.39 1716 27 26 6.90 1.86 0.27 1584 6.70 1.81 0.27 1667 6.60 1.78 0.27 1716 6.40 1.73 0.27 1766 28 18 5.88 4.64 0.79 1320 5.63 4.44 0.79 1386 5.40 4.27 0.79 1452 5.20 4.11 0.79 1518 28 20 6.13 4.10 0.67 1386 5.88 3.94 0.67 1469 5.70 3.82 0.67 1502 5.50 3.69 0.67 1568 28 22 6.38 3.51 0.55 1436 6.15 3.38 0.55 1526 6.00 3.30 0.55 1568 5.75 3.16 0.55 1634 28 24 6.70 2.88 0.43 1502 6.45 2.77 0.43 1584 6.30 2.71 0.43 1634 6.10 2.62 0.43 1716 28 26 6.90 2.14 0.31 1584 6.70 2.08 0.31 1667 6.60 2.05 0.31 1716 6.40 1.98 0.31 1766 29 18 5.88 4.88 0.83 1320 5.63 4.67 0.83 1386 5.40 4.48 0.83 1452 5.20 4.32 0.83 1518 29 20 6.13 4.35 0.71 1386 5.88 4.17 0.71 1469 5.70 4.05 0.71 1502 5.50 3.91 0.71 1568 29 22 6.38 3.76 0.59 1436 6.15 3.63 0.59 1526 6.00 3.54 0.59 1568 5.75 3.39 0.59 1634 29 24 6.70 3.15 0.47 1502 6.45 3.03 0.47 1584 6.30 2.96 0.47 1634 6.10 2.87 0.47 1716 29 26 6.90 2.42 0.35 1584 6.70 2.35 0.35 1667 6.60 2.31 0.35 1716 6.40 2.24 0.35 1766 30 18 5.88 5.11 0.87 1320 5.63 4.89 0.87 1386 5.40 4.70 0.87 1452 5.20 4.52 0.87 1518 30 20 6.13 4.59 0.75 1386 5.88 4.41 0.75 1469 5.70 4.28 0.75 1502 5.50 4.13 0.75 1568 30 22 6.38 4.02 0.63 1436 6.15 3.87 0.63 1526 6.00 3.78 0.63 1568 5.75 3.62 0.63 1634 30 24 6.70 3.42 0.51 1502 6.45 3.29 0.51 1584 6.30 3.21 0.51 1634 6.10 3.11 0.51 1716 30 26 6.90 2.69 0.39 1584 6.70 2.61 0.39 1667 6.60 2.57 0.39 1716 6.40 2.50 0.39 1766 31 18 5.88 5.35 0.91 1320 5.63 5.12 0.91 1386 5.40 4.91 0.91 1452 5.20 4.73 0.91 1518 31 20 6.13 4.84 0.79 1386 5.88 4.64 0.79 1469 5.70 4.50 0.79 1502 5.50 4.35 0.79 1568 31 22 6.38 4.27 0.67 1436 6.15 4.12 0.67 1526 6.00 4.02 0.67 1568 5.75 3.85 0.67 1634 31 24 6.70 3.69 0.55 1502 6.45 3.55 0.55 1584 6.30 3.47 0.55 1634 6.10 3.36 0.55 1716 31 26 6.90 2.97 0.43 1584 6.70 2.88 0.43 1667 6.60 2.84 0.43 1716 6.40 2.75 0.43 1766 32 18 5.88 5.58 0.95 1320 5.63 5.34 0.95 1386 5.40 5.13 0.95 1452 5.20 4.94 0.95 1518 32 20 6.13 5.08 0.83 1386 5.88 4.88 0.83 1469 5.70 4.73 0.83 1502 5.50 4.57 0.83 1568 32 22 6.38 4.53 0.71 1436 6.15 4.37 0.71 1526 6.00 4.26 0.71 1568 5.75 4.08 0.71 1634 32 24 6.70 3.95 0.59 1502 6.45 3.81 0.59 1584 6.30 3.72 0.59 1634 6.10 3.60 0.59 1716 32 26 6.90 3.24 0.47 1584 6.70 3.15 0.47 1667 6.60 3.10 0.47 1716 6.40 3.01 0.47 1766

INDOOR INDOOR

CAPACITY:5.0(kW)

INPUT:1650(W)SHF:0.69

OUTDOOR DB(:)

25 27 30

WB(:)

Q SHC SHF Q SHC SHF Q SHC SHF Q SHC SHFINPUT INPUT INPUT INPUT

DB(:)

PERFORMANCE DATA COOL operation Rated frequency 79Hz

MSZ-GB50VA : MUZ-GB50VA

NOTE Q : Total capacity (kW) SHF : Sensible heat factor DB : Dry-bulb temperature

SHC : Sensible heat capacity (kW) INPUT : Total power input (W) WB : Wet-bulb temperature

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Mitsubishi MUZ-GB50VA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual