Mitsubishi Electric MFZ-KA25VA Manuale utente

CONTENTS

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

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

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

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

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

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

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

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

9. SERVICE FUNCTIONS ····································19

10. TROUBLESHOOTING······································21

11. DISASSEMBLY INSTRUCTIONS·····················35

12. PARTS LIST······················································39

13. RoHS PARTS LIST···········································43

14. OPTIONAL PARTS···········································47

MFZ-KA25VA -

MFZ-KA35VA -

MFZ-KA50VA -

MFZ-KA50VA - A2

FLOOR-TYPE, HEAT PUMPAIR CONDITIONERS

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

NOTE:

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

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

For servicing of RoHS compliant products, refer to the RoHS Parts List.

SERVICE MANUAL

Wireless type

Models

No. OB410

REVISED EDITION-A

INDOOR UNIT

Revision A:

●MFZ-KA25VA- , MFZ-KA35VA- and

MFZ-KA50VA- have been added.

●“Failure mode recall function” has been corrected.

●RoHS PARTS LIST has been added.

A2A2

Please void OB410.

Outdoor unit service manual

SUZ-KA•VA Series (OC323)

MXZ-A•VA Series (OB447, OC316)

OB410A--1qxp 06.6.2 4:25 PM Page 1

1TECHNICAL CHANGES

2PART NAMES AND FUNCTIONS

INDOOR UNIT

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

Vertical vane

Air outlet

Horizontal vane

Catechin air filter

Display and operation section (When the front grille is opened)

Remote controller

Operation indicator lamp

Emergency operation switch

Air outlet selection switch

Remote control

receiving section

Front grille

Fan guard

Air cleaning filter

(Anti-Allergy Enzyme

Filter, blue bellows type)

Damper

Air outlet

Air inlet

Panel

Vertical vane

MFZ-KA25VA- ➔MFZ-KA25VA-

MFZ-KA35VA- ➔MFZ-KA35VA-

MFZ-KA50VA- ➔MFZ-KA50VA-

1. The operation of thermo-off-unit has been changed. (When 2 or more indoor units are connected with a multi type outdoor

unit, and operated in heat mode.)

< > Indoor fan operates with very Low speed or stops.

< > Indoor fan operates intermittently with very Low speed or stops.

A2A1

Revision A:

• MFZ-KA25VA- , MFZ-KA35VA- and MFZ-KA50VA- have been added.

• “Failure mode recall function” has been corrected.

• RoHS PARTS LIST has been added.

A2A2A2

OB410A--1qxp 06.6.2 4:25 PM Page 2

ACCESSORIES

REMOTE CONTROLLER

Drain hose

Remote controller holder

Fixing screw for 23.5 o1.6 mm (Black)

Pipe cover

Band

Battery (AAA) for remote controller

Indoor unit mounting bracket

Fixing screw for 74 o25 mm

Wood screw for the indoor unit fixation

Washer of 9

Felt tape (Used for left or left-rear piping)

Wireless remote controller

Air cleaning filter

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

Open the front lid.

ON-TIMER button

CLOCK SET button

TIME SET buttons

FORWARD button

BACKWARD button

OFF-TIMER button

i save button

RESET button VANE CONTROL button

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

Signal transmitting section

Operation display section

Temperature buttons

OPERATE/STOP

(ON/OFF) button

Indication of

remote controller

model is on back

OB410A--1qxp 06.6.2 4:25 PM Page 3

3SPECIFICATION

Cooling

522

426/ 348/ 288

1,080

940/ 800/ 700

880

740/ 650/ 550

MFZ-KA35VAMFZ-KA25VA MFZ-KA50VA

Indoor model

Function

Power supply Single phase

230V,50Hz

0.2

—

0.2

RC0J30-GA

RC0J30-HA

700O600O200

32/ 27/ 22

KM05G

Heating

546

456/ 372/ 300

1,010

870/ 740/ 630

1,010

870/ 740/ 630

Air flow(Super High)

Air flow(High/Med./Low)

Power outlet

Running current ✽1

Power input ✽1

Auxiliary heater

Power factor ✽1

Fan motor current ✽1

Model (Upper)

Model (Lower)

Dimensions WOHOD

Weight

Air direction

Sound level(Super High)

Sound level(High/Med./Low)

Fan speed(Super High)

Fan speed(High/Med./Low)

Fan speed(Super High)

Fan speed(High/Med./Low)

Fan speed regulator

Thermistor RT11(at 25:)

Thermistor RT12(at 25:)

Thermistor RT13(at 25:)

Thermistor RT14(at 25:)

Thermistor RT15(at 25:)

Remote controller model

K/h

A(kW)

dB(A)

rpm

Electrical

data

Capacity

Fan

motor

Special

remarks

Cooling

546

444/ 366/ 300

33/ 28/ 23

1,130

970/ 830/ 720

930

770/ 680/ 570

Single phase

230V,50Hz

0.2

—

0.2

RC0J30-GA

RC0J30-HA

700O600O200

KM05G

Heating

570

468/ 372/ 312

38/ 28/ 25

1,030

890/ 740/ 650

1,030

890/ 740/ 650

Cooling

642

552/ 474/ 426

1,280

1,140/ 1,020/ 940

1,080

940/ 820/ 740

Single phase

230V,50Hz

0.2

—

0.2

RC0J30-GA

RC0J30-HA

700O600O200

39/ 35 / 32

KM05G

Heating

708

588/ 528/ 444

1,260

1,070/ 930/ 850

1,260

1,070/ 930/ 850

UpperLower

NOTE : Test conditions are based on ISO 5151.

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

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

Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:

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

Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency.

OB410A--1qxp 06.6.2 4:25 PM Page 4

T3.15AL 250V

12V 300"

ERZV14D471

Item Model

Fuse

Damper lock motor Right

Damper lock motor Left

Horizontal vane motor

Damper motor

Varistor

MFZ-KA25VA MFZ-KA35VA MFZ-KA50VA

(F11)

(ML1)

(ML2)

(MV1)

(MV2)

(NR11)

Specifications and rating conditions of main electric parts

Function

Power supply

Outdoor model

Capacity Rated frequency(Min.~Max.)

Dehumidification

Air flow(High/Low)

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

Fan speed(High/Low, High/Med/Low)

Fan speed regulator

Refrigerant filling

capacity(R410A)

Refrigerating oil (Model)

Thermistor RT61 (at 0:)

Thermistor RT62 (at 100:)

Thermistor RT64 (at 50:)

Thermistor RT65 (at 25:)

Thermistor RT61 (at 25:)

Thermistor RT62 (at 100:)

Thermistor RT64 (at 50:)

Thermistor RT65 (at 25:)

Thermistor RT68 (at 25:)

L/h

K/h

rpm

Single phase

230V,50Hz

1.2

4.0

0.33

KNB073FDVH

550

U-V 1.53 U-W 1.53

V-W 1.53

RC0J50-AL

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

800o550o285

0.90

0.32 (NEO22)

32.6

13.4

—

Cooling

2.5 (0.9 - 3.4)

1,890 / 1,746

2.3

4.31

810/750

880/810/650

3840/760

880/800/630

Heating

3.4 (0.9 - 5.1)

2,058 / 1,506

3.5

4.07

SUZ-KA25VA.TH

Indoor model

MFZ-KA25VA Indoor model

MFZ-KA35VA

Compressor

Fan

motor

Special

remarks

Coefficient of performance (C.O.P) ✽1

Capacity

Electrical

data

SUZ-KA35VA.TH

Single phase

230V,50Hz

1.7

5.0

0.33

KNB092FCAH

650

U-V 0.49 U-W 0.49

V-W 0.49

RC0J50-AL

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

800o550o285

1.05

0.32 (NEO22)

32.6

13.4

—

Cooling

3.5 (0.9 - 3.9)

1,896 / 1,668

4.5

3.21

Heating

4.0 (0.9 - 6.2)

1,956 / 1,356

4.5

3.64

Indoor model

MFZ-KA50VA

SUZ-KA50VA.TH

Single phase

230V,50Hz

2.5

8.5

0.30

SNB130FLDH

850

U-V 0.45 U-W 0.45

V-W 0.45

RC0J60-AA

WHT-BLK 15.2

BLK-RED 15.2

RED-WHT 15.2

840o850o330

1.60

0.45 (NEO22)

—

10.0

13.4

17.0

10.0

Cooling

4.8 (0.9 - 5.4)

2,940 / 1,650

6.5

3.10

800/480

Heating

6.0(0.9 - 7.9)

2,940 / 2,210

8.0

3.23

800/650

NOTE : Test conditions are based on ISO 5151.

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

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

Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:

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

Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency.

OB410A--1qxp 06.6.2 4:25 PM Page 5

4NOISE CRITERIA CURVES

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 20 µPa

OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 20 µPaOCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 20 µPa

10 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 27: Wet-bulb temperature 19:

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:

10 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 27: Wet-bulb temperature 19:

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:90

10 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 27: Wet-bulb temperature 19:

APPROXIMATE

THRESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:

MFZ-KA25VA

INDOOR UNIT

WALL

1m 1m

MICROPHONE

MFZ-KA35VA

MFZ-KA50VA

OB410A--1qxp 06.6.2 4:25 PM Page 6

OUTLINES AND DIMENSIONS

Unit : mm

INDOOR UNIT

19 60

125

147

454155

110

337 337

363

333210 593 7

131131

4-[6 Hole

Indoor unit

Installation plate

123

125

6019

128

118

165

205

20012

Gas pipe

25, 35:[9.52(flared)3/8

50:[12.7(flared)1/2

Liquid pipe

[6.35(flared)1/4

drain

Air in

Air out

46.5 46.5

600

700

54 508 137

607

More than

100mm

More than

100mm More than

100mm

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

OB410A--1qxp 06.6.2 4:25 PM Page 7

6WIRING DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Indoor coil

thermistor

RT12, RT14,

RT15 (main)

RT13 (sub)

Flared connection

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant pipe [9.52 (MFZ-KA25/35VA)

Refrigerant pipe [12.7 (MFZ-KA50VA)

(with heat insulator)

Refrigerant pipe [6.35

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Distributor

INDOOR UNIT

Unit : mm

INDOOR UNIT MODELS WIRING DIAGRAM

SYMBOL

DB111

F11

LS1

LS2

MF1

MF2

ML1

SYMBOL

ML2

MV1

MV2

NR11

RT11

RT12

RT13

NAME

DIODE STACK

FUSE (T3.15AL250V)

DAMPER LIMIT SWITCH (OPEN)

DAMPER LIMIT SWITCH (CLOSE)

UPPER INDOOR FAN MOTOR

LOWER INDOOR FAN MOTOR

DAMPER LOCK MOTOR (RIGHT)

NAME

DAMPER LOCK MOTOR (LEFT)

HORIZONTAL VANE MOTOR

DAMPER MOTOR

VARISTOR

ROOM TEMPERATURE THERMISTOR

INDOOR COIL THERMISTOR (MAIN 1)

INDOOR COIL THERMISTOR (SUB)

SYMBOL

RT14

TR15

T11

NAME

INDOOR COIL THERMISTOR (MAIN 2)

INDOOR COIL THERMISTOR (MAIN 3)

TRANSFORMER

NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

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

3. Symbols below indicate.

/: Terminal block, : Connector

POWER MONITOR

RECEIVER P.C.BOARD

230V~

BLU

INDOOR ELECTRONIC

CONTROL P.C. BOARD

SW P.C.

BOARD

INTERLOCK

SWITCH(FAN)

TO OUTDOOR

UNIT

CONNECTING

BLK

RED

TB TAB3

DB111

NR11

F11

105(T)

101(A)

12-24V

RT13

1R1

GRN

LD104

CN201

151

T111

RED

WHT

111

112

CN211 BLU

YLW

BLK

RT11

RT12

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

GRN

CN202

12-24V

S3 RED

BLK

TO OUTDOOR

UNIT

CONNECTING

INDOOR ELECTRONIC

CONTROL P.C. BOARD

WHT

230V~

S2 WHT CN201

LD103

CN112

CN113

111

RT11

RT15

RT12

RT13

RT14

1Y1

1X1

LS1

LS2

CN212

T11

F11

NR11

DB111

ML1

MV1

151

MF2

MF1

ML2

152

MV2

106

CN CN

125

CN211

DISP REC

P.C.BOARD

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

OB410A--1qxp 06.6.2 4:25 PM Page 8

PERFORMANCE CURVES

Wet-and dry-bulb

thermometers

BACK VIEW

OUTDOOR UNIT

FRONT VIEW

Wet and dry-bulb

thermometers

Indoor air Wet-bulb temperature

difference (:)

Indoor intake air Wet-bulb temperature (:)

Outdoor intake air Dry-bulb temperature (:)

Indoor intake air Wet-bulb temperature (:)

Outdoor intake air Dry-bulb temperature (:)

SUZ-KA25VA.TH

7.4

6.8

6.2

5.6

5.0

4.5

10.4

9.5

8.6

7.8

7.0

6.2

Rated frequency 57Hz

SUZ-KA35VA.TH

Rated frequency 77Hz

12.5

11.4

10.4

9.3

8.3

7.4

SUZ-KA50VA.TH

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50

Rated frequency 75Hz

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

INDOOR UNIT

The standard data contained in these specifications apply only to the operation of the air conditioner under normal condition.

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

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

COOLING

(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

Indoor air wet/dry-bulb temperature difference on the 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 inlet 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 inlet.

Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of the room.

5. Press the EMERGENCY OPERATION switch once to start the 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.

HEATING

(1) Indoor intake air dry-bulb temperature : ˚C [DB]

(2) Indoor outlet air dry-bulb temperature : ˚C [DB]

(3) Outdoor intake air wet-bulb temperature : ˚C [WB]

(4) Total input : W

OB410A--1qxp 06.6.2 4:25 PM Page 9

OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT

24.4

22.6

20.7

18.8

16.9

15.0

13.2

11.3

27.5

25.4

23.3

21.2

19.1

16.9

14.8

12.7

Indoor air Dry-bulb temperature

difference (:)

Indoor intake air Dry-bulb temperature (:)

Outdoor intake air Wet-bulb temperature (:) Outdoor intake air Wet-bulb temperature (:)

Indoor intake air Dry-bulb temperature (:)

SUZ-KA25VA.TH

Rated frequency 80Hz

SUZ-KA35VA.TH

Rated frequency 74Hz

33.0

30.4

27.9

25.4

22.8

20.3

17.8

15.2

SUZ-KA50VA.TH

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

Rated frequency 79Hz

NOTE:The above curves are for the heating operation without any frost.

Correction of Cooling capacity

Capacity correction factors