Mitsubishi Electric MUFZ-KJ25VE-E1 Manual de usuario

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ··································· 3

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

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

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

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

6. WIRING DIAGRAM············································ 8

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

8. PERFORMANCE CURVES····························· 12

9. ACTUATOR CONTROL··································· 23

10. SERVICE FUNCTIONS···································· 24

11. TROUBLESHOOTING····································· 25

12. DISASSEMBLY INSTRUCTIONS···················· 46

Models

SPLIT-TYPE AIR CONDITIONERS

NOTE:

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

HFC

utilized

R410A

No. OBH667

REVISED EDITION-B

OUTDOOR UNIT

Indoor unit service manual

MFZ-KJ•VE Series (OBH666)

PARTS CATALOG (OBB667)

MUFZ-KJ25VE-E1 , ER1

MUFZ-KJ35VE-E1 , ER1

MUFZ-KJ50VE-E1 , ER1

MUFZ-KJ25VE

MUFZ-KJ35VE

Please void OBH667 REVISED EDITION-A.

Revision B:

•

MUFZ-KJ25VE -

ER1

, MUFZ-KJ35VE -

ER1

and

MUFZ-KJ50VE -

ER1

have been added.

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.

Revision A:

•

MUFZ-KJ50VE -

has been added.

Revision B:

•

MUFZ-KJ25VE -

ER1

, MUFZ-KJ35VE -

ER1

and MUFZ-KJ50VE -

ER1

have been added.

OBH667B

MUFZ-KJ25VE - E1 ,ER1

MUFZ-KJ35VE - E1 ,ER1

MUFZ-KJ50VE - E1 ,ER1

1. New model

TECHNICAL CHANGES

Air outlet

Drain outlet

Piping

Drain hose

Air inlet

(back and side)

MUFZ-KJ25VE

MUFZ-KJ35VE

PART NAMES AND FUNCTIONS

ACCESSORIES

Model MUFZ-KJ25VE

MUFZ-KJ35VE

MUFZ-KJ50VE

Drain socket 1

Piping

Air outlet

Drain outlet

Air inlet

(back and side)

Drain hose

MUFZ-KJ50VE

OBH667B

Outdoor model MUFZ-KJ25VE MUFZ-KJ35VE MUFZ-KJ50VE

Power supply Single phase, 230 V, 50 Hz

Capacity

Rated frequency (Min.-Max.)

Cooling kW 2.5 (0.5 - 3.4) 3.5 (0.5 - 3.7) 5.0 (1.6 - 5.7)

Heating 3.4 (1.2 - 4.6) 4.3 (1.2 - 5.5) 6.0 (2.2 - 8.2)

Breaker Capacity A 10 16

Electrical data

Power input 1 (Total) Cooling W540 940 1,410

Heating 770 1,110 1,610

Running current 1

(Total)

Cooling A2.7 4.2 6.2

Heating 3.6 5.1 7.1

Power factor 1 (Total) Cooling %87 98

Heating 91 93 98

Starting current 1 (Total) A 3.6 5.1 7.1

Coefﬁcient of performance

(COP) 1 (Total)

Cooling 4.63 3.72 3.55

Heating 4.42 3.91 3.73

Compressor

Model SNB140FRUMT SNB172FEKMT

Output W 950 1,200

Current 1Cooling A2.19 3.69 5.18

Heating 3.16 4.61 5.94

Refrigeration oil (Model) L 0.35 (FV50S) 0.40 (FV50S)

Fan motor

Model RC0J50-CI RC0J60-BC

Current 1Cooling A0.28 0.82

Heating 0.31 0.82

Dimensions W × H × D mm 800 × 550 × 285 840 × 880 × 330

Weight kg 37 55

Special remarks

Dehumidiﬁcation Cooling L/h 0.6 1.4 2.0

Air ﬂow 1

Cooling Med.

m3/h

1,806 2,748

Low 1,038 1,632

Heating

High 2,016 2,856

Med. 1,710 2,748

Low 1,326 2,274

Sound level

Cooling dB(A) 46 47 49

Heating 51

Fan speed

Cooling Med.

rpm

810 780

Low 490 480

Heating

High 900 810

Med. 770 780

Low 610 650

Fan speed regulator 3

Refrigerant ﬁlling capacity (R410A) kg 1.10 1.50

NOTE: Test conditions are based on ISO 5151.

Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C

Outdoor Dry-bulb temperature 35°C

Heating: Indoor Dry-bulb temperature 20°C

Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

Refrigerant piping length (one way): 5 m

1 Measured under rated operating frequency.

SPECIFICATION

OBH667B

Speciﬁcations and rated conditions of main electric parts

Model

Item MUFZ-KJ25VE MUFZ-KJ35VE

Smoothing

capacitor (C61, C62) 600 μF/ 620 μF 420 V

Diode module (DB61) 15 A 600 V

Fuse (F61) T20AL250V

(F701, F801, F901)

T3.15AL250V

Power module (IC700) 15 A 600 V

(IC932) 8A600V

Expansion valve

coil (LEV) 12 V DC

Reactor (L61) 23 mH

Power factor

controller (IC820) 20A 600V

Circuit

protection (PTC64, PTC65) 33 Ω

Terminal block (TB) 5 P

Relay

(X63) 3 A 250 V

(X64) 20 A 250 V

(X69) 10A 250V

R.V.coil (21S4) 220 - 240 V AC

Speciﬁcations and rated conditions of main electric parts

Model

Item MUZ-KJ50VE

Smoothing

capacitor

(CB1, CB2, CB3)

560 μF 450 V

Fuse

(F601, F880, F901)

T3.15AL250 V

IGBT module (IC932) 5 A 600 V

(IC700) 20 A 600 V

Expansion valve

coil (LEV) 12 V DC

Reactor (L) 340 μH

Diode module (IC820) 20 A 600 V

Circuit

protection (PTC64, PTC65) 33 Ω

Terminal block (TB1, TB2) 3 P

Relay

(X64) 20 A 250 V

(X65) 20 A 250 V

(X69) 10 A 250 V

(X601) 3 A 250 V

(X602) 3 A 250 V

R.V. coil (21S4) 220 - 240 V AC

OBH667B

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION SPL(dB(A)) LINE

HEATING

NC-10

MUFZ-KJ25VE

10 63 125 250 500 1000 2000 4000 8000

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

COOLING

FUNCTION SPL(dB(A)) LINE

HEATING

NC-10

MUFZ-KJ35VE

NOISE CRITERIA CURVES

Test conditions

Cooling: Dry-bulb temperature 35°C

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

OUTDOOR UNIT

MICROPHONE

1 m

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

NC-10

COOLING

FUNCTION SPL(dB(A)) LINE

HEATING

MUFZ-KJ50VE

OBH667B

800

302.5

500 Bolt pitch for installation

150

22.3

Handle

550

280

164.5

99.5

170.5

23 Service panel

Service port

285

344.5

400

Air in

Air out

Air in

17.5

Bolt pitch for

installation

304~325

Liquid refrigerant pipe joint

Refrigerant pipe (flared) ø6.35

Gas refrigerant pipe joint

Refrigerant pipe (flared) ø9.52

2 holes 10 X 21

Drain hole ø42

REQUIRED SPACE

350 mm or more

100 mm or more

*1 100 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

Clear *1

200 mm or

more *2

Unit: mm

MUFZ-KJ25VE

MUFZ-KJ35VE

OUTLINES AND DIMENSIONS

MUFZ-KJ50VE

417.5

Drain hole

175 500

330

Air in

Air out 2-holes 10 21

360

840

109 81

880

452

Service panel

99.5

164.5

195

Liquid refrigerant pipe joint

Refrigerant pipe (flared) Ø6.35

Gas refrigerant pipe joint

Refrigerant pipe (flared) Ø12.7

350 mm or more

100 mm or more

REQUIRED SPACE

100 mm or more

500 mm

or more *2

*1 500 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

Clear *1

OBH667B

WIRING DIAGRAM

MUFZ-KJ25VE

MUFZ-KJ35VE

OBH667B

MUFZ-KJ50VE

OBH667B

Unit: mm

MUFZ-KJ25VE

MUFZ-KJ35VE

Outdoor

heat

exchanger

Flared connection

Defrost

thermistor

RT61

Discharge

temperature

thermistor

RT62

Flared connection

Stop valve

(with strainar)

Stop valve

Refrigerant flow in cooling

Compressor

4-way valve

Refrigerant flow in heating

Refrigerant pipe ø9.52

(with heat insulator)

Refrigerant pipe ø6.35

(with heat insulator)

R.V. coil

heating ON

cooling OFF

Strainer

#100

LEV

Ambient

temperature

thermistor

RT65

Muffler

Capillary tube

ø4.0×ø2.4×240

Outdoor heat

exchanger

temperature

thermistor

RT68

Capillary tube

ø3.0×ø2.0×210

Muffler

REFRIGERANT SYSTEM DIAGRAM

MUFZ-KJ50VE

Outdoor

heat

exchanger

Flared connection

Defrost

thermistor

RT61

Discharge

temperature

thermistor

RT62

Flared connection

Stop valve

Capillary tube

4.0

2.4

100 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

Muffler R.V. coil

heating ON

cooling OFF

Muffler

#100

Strainer

#100

Outdoor heat

exchanger

temperature

thermistor

RT68

Ambient

temperature

thermistor

RT65

Strainer

#100

OBH667B

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