Mitsubishi Electric MXZ-2HJ40VA Manual de usuario

Models

MXZ-2HJ40VA -E1 ,ER1 ,ET1

MXZ-3HJ50VA -E1 ,ER1 ,ET1

HFC

utilized

R410A

INDOOR UNIT

SERVICE MANUAL No. OBH709

REVISED EDITION-A

OUTDOOR UNIT

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES······························ 6

5. OUTLINES AND DIMENSIONS ························ 7

6. WIRING DIAGRAM············································ 9

7. REFRIGERANT SYSTEM DIAGRAM············· 10

8. PERFORMANCE CURVES····························· 13

9. ACTUATOR CONTROL··································· 19

10. SERVICE FUNCTIONS···································· 20

11. TROUBLESHOOTING····································· 24

12. DISASSEMBLY INSTRUCTIONS···················· 50

INDOOR UNITS COMBINATION SHEETS

NOTE:

RoHS compliant products have <G> mark

on the spec name plate.

PARTS CATALOG (OBB709)

MXZ-2HJ40VA

Indoor unit service manual

MSZ-HJ•VA Series (OBH647C)

Please void OBH709.

Revision A:

• Additional refrigerant charge for MXZ-

3HJ50- E1 ,ER1 ,ET1 has been corrected.

Prepare the proper tools.

Prepare the proper protectors.

Provide adequate ventilation.

After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.

Discharge the capacitor before the work involving the electric parts.

Do not perform the work involving the electric parts with wet hands.

Do not pour water into the electric parts.

Do not touch the refrigerant.

Do not touch the hot or cold areas in the refrigeration cycle.

When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to

touch the live parts.

Use the speciﬁed 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.

TECHNICAL CHANGES

MXZ-2HJ40VA - E1 , ER1 , ET1

MXZ-3HJ50VA - E1 , ER1 , ET1

1. New model

Revision A:

• Additional refrigerant charge for MXZ-3HJ50- E1 ,ER1 ,ET1 has been corrected.

(Refer to 7. REFRIGERANT SYSTEM DIAGRAM.)

OBH709A

PART NAMES AND FUNCTIONS

ACCESSORIES

MXZ-2HJ40VA

Air inlet

Air outlet

Drain outlet

Piping

Drain hose

(Back and side)

Model MXZ-2HJ40VA MXZ-3HJ50VA

Drain socket 1 1

Drain cap 2

Air outlet

Drain outlet

Air inlet

(Back and side)

MXZ-3HJ50VA

OBH709A

SPECIFICATION

Outdoor model MXZ-2HJ40VA

Outdoor unit power supply Single phase

230 V, 50 Hz

System

Indoor units number 2

Piping total length m Max. 30

Connecting pipe length m Max. 20

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.) 2 kW 4.0 (1.1 - 4.3) 4.3 (1.0 - 4.7)

Breaker capacity A 15

Electrical

data

Power input (Total) 1, 2 W 1,050 1,160

Running current (Total) 1, 2 A 5.1 5.6

Power factor (Total) 1, 2% 90

Starting current (Total) 1, 2 A 5.6

Coefﬁcient of performance (C.O.P) (Total) 1, 2 3.81 3.71

Compressor

Model KNB092FFDHC

Output W 1,100

Current 1, 2 A 4.7 5.2

Refrigeration oil (Model) L 0.32 (NEO22)

Fan

motor

Model RC0J50-FA

Current 1, 2 A 0.19 0.23

Dimensions W x H x D mm 800 x 550 x 285

Weight kg 32

Special

remarks

Air ﬂow (Rated) m3/h 1,752 1,914

Sound level (Rated) dB(A) 48 52

Fan speed (Rated) rpm 840 910

Refrigerant ﬁlling capacity (R410A) kg 0.95

1 Measured under rated operating frequency.

2 When connected with below indoor units.

MSZ-HJ25VA + MSZ-HJ25VA

NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)

COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C

OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C

HEATING INDOOR Dry-bulb temperature 20.0 °C

OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH709A

Outdoor model MXZ-3HJ50VA

Outdoor unit power supply Single phase

230 V, 50 Hz

System

Indoor units number 2 to 3

Piping total length m Max. 50

Connecting pipe length m Max. 25

Height difference (Indoor ~ Outdoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Height difference (Indoor ~ Indoor) m Refer to 7 REFRIGERANT SYSTEM DIAGRAM.

Function Cooling Heating

Capacity Rated frequency (Min.-Max.) 2 kW 5.0 (2.7 - 6.5) 6.0 (2.4 - 7.5)

Breaker capacity A 25

Electrical

data

Power input (Total) 1, 2 W 1,130 1,310

Running current (Total) 1, 2 A 5.0 5.8

Power factor (Total) 1, 2% 99

Starting current (Total) 1, 2 A 5.8

Coefﬁcient of performance (C.O.P) (Total) 1, 2 4.42 4.58

Compressor

Model SNB130FGBH1T

Output W 1,300

Current 1, 2 A 4.5 5.3

Refrigeration oil (Model) L 0.7 (NEO22)

Fan

motor

Model SIC-71FW-F764-1

Current 1, 2 A 0.20 0.23

Dimensions W x H x D mm 840 x 710 x 330

Weight kg 57

Special

remarks

Air ﬂow (Rated) m3/h 2,252 2,379

Sound level (Rated) dB(A) 50 53

Fan speed (Rated) rpm 630 660

Refrigerant ﬁlling capacity (R410A) kg 2.7

1 Measured under rated operating frequency.

2 When connected with below indoor units.

MSZ-HJ25VA + MSZ-HJ25VA + MSZ-HJ25VA

NOTE: Test conditions are based on ISO 5151. (Refrigerant piping length (one way): 5 m)

COOLING INDOOR Dry-bulb temperature 27.0 °C Wet-bulb temperature 19.0 °C

OUTDOOR Dry-bulb temperature 35.0 °C Wet-bulb temperature 24.0 °C

HEATING INDOOR Dry-bulb temperature 20.0 °C

OUTDOOR Dry-bulb temperature 7.0 °C Wet-bulb temperature 6.0 °C

OBH709A

10 63 125 250 500 1000 2000 4000 8000

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

NOISE CRITERIA CURVES

MXZ-2HJ40VA

10 63 125 250 500 1000 2000 4000 8000

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

CoolingHigh

FUNCTION

FAN SPEED

HeatingHigh

SPL(dB(A))

LINE

MXZ-3HJ50VA

OUTDOOR UNIT

MICROPHONE

Test conditions

Cooling :Dry-bulb temperature 35°C Wet-bulb temperature 24°C

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

OBH709A

OUTLINES AND DIMENSIONS

MXZ-2HJ40VA Unit: mm

OBH709A

1.Installation space

Note : Leave front and both sides

free of obstruction.

Note : Leave rear, overhead and

both sides free of obstruction.

500 or more

100 or more

Note : Leave front and overhead

free of obstruction.

100 or more 350 or more

200 or more

500 or more

2.Service space

100 or more

500 or more

350 or more

100 or more Service space

Liquid pipe : Ø6.35(flared)1/4 C unit connection

B unit connection

A unit connection

Gas pipe : Ø9.52(flared)3/8

Liquid pipe : Ø6.35(flared)1/4

Gas pipe : Ø9.52(flared)3/8

Liquid pipe : Ø6.35(flared)1/4

Gas pipe : Ø9.52(flared)3/8

MXZ-3HJ50VA Unit: mm

OBH709A

WIRING DIAGRAM

MXZ-2HJ40VA - E1 , ER1 , ET1

MXZ-3HJ50VA - E1 , ER1 , ET1

OBH709A

UNIT: mm (inch)

Piping length each indoor unit (a, b) 20 m

Total piping length (a+b) 30 m

Bending point for each unit 20

Total bending point 30

MXZ-2HJ40VA

MAX REFRIGERANT PIPING LENGTH

Outdoor

unit

Indoor

units

15 m

10 m

15 m

Refrigerant piping length (one way, 2 unit total)

Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 20)

Outdoor unit

precharged

(g) 30 m

200

20 m

950

Max.

Height

difference

Outdoor unit union diameter

For

Indoor unit A Liquid 6.35(1/4)

Gas 9.52(3/8)

Indoor unit B Liquid 6.35(1/4)

Gas 9.52(3/8)

Stop valve

(with strainer #100) LEV A

LEV B

Compressor

Muffler

4-way valve

Indoor unit

Capillary tube

Stop valve

(with strainer #100)

Refrigerant flow in cooling

Refrigerant flow in heating

Discharge

temperature

thermistor RT62

Stop valve

(with service port)

Stop valve

(with service port)

Strainer

#100

Sub muffler

Defrost

thermistor

RT61

Ambient

temperature

thermistor

RT65

Outdoor heat

exchanger

temperature

thermistor

RT68 FAN-OUT

HEX-OUT

It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

UNIT: mm

REFRIGERANT SYSTEM DIAGRAM

Refrigerant pipe diameter is different according to indoor unit to be

connected. When using extension pipes, refer to the right table.

When diameter of refrigerant pipe is different from that of outdoor

unit union, use optional Different-diameter pipe.

For further information on Different-diameter pipe, refer to "PARTS

CATALOG".

OBH709A

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