Mitsubishi Electric MFZ-KA25VA Manuale utente

CONTENTS

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

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

3. SPECIFICATION················································ 5

4. NOISE CRITERIA CURVES ······························ 8

5. OUTLINES AND DIMENSIONS ························ 9

6. WIRING DIAGRAM·········································· 10

7. REFRIGERANT SYSTEM DIAGRAM ··············11

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

9. SERVICE FUNCTIONS ··································· 23

10. TROUBLESHOOTING····································· 25

11. DISASSEMBLY INSTRUCTIONS ···················· 39

12. PARTS LIST····················································· 43

13. RoHS PARTS LIST·········································· 47

14. OPTIONAL PARTS·········································· 51

SPLIT-TYPE AIR 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

Models

No. OB409

REVISED EDITION-E

INDOOR UNIT

Revision E:

MFZ-KA25VA- E5 , MFZ-KA35VA- E5 and

MFZ-KA50VA- E5 have been added.

Please void OB409 REVISED EDITION-D.

MFZ-KA25VA -E1

MFZ-KA25VA -E2

MFZ-KA25VA -E3

MFZ-KA25VA -E4

MFZ-KA25VA -E5

MFZ-KA35VA -E1

MFZ-KA35VA -E2

MFZ-KA35VA -E3

MFZ-KA35VA -E4

MFZ-KA35VA -E5

MFZ-KA50VA -E1

MFZ-KA50VA -E2

MFZ-KA50VA -E3

MFZ-KA50VA -E4

MFZ-KA50VA -E5

Outdoor unit service manual

SUZ-KA•VA(H) Series (OC322)

MXZ-A•VA Series (OB377, OC316)

MXZ-8B•VA Series (OCH480)

MXZ-D•VA Series (OBH626)

1TECHNICAL CHANGES

MFZ-KA25VA- E1 MFZ-KA25VA- E2

MFZ-KA35VA- E1 MFZ-KA35VA- E2

MFZ-KA50VA- E1 MFZ-KA50VA- E2

1. 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.)

< E1 > Indoor fan operates with very Low speed or stops.

< E2 > Indoor fan operates intermittently with very Low speed or stops.

MFZ-KA25VA- E2 MFZ-KA25VA- E3

MFZ-KA35VA- E2 MFZ-KA35VA- E3

MFZ-KA50VA- E2 MFZ-KA50VA- E3

1. Control of auto fan speed has been changed. (When indoor units are connected with a multi type outdoor

unit, and operated in heat mode.)

Air flow in auto fan speed is changed depending on air outlet temperature of indoor unit.

MFZ-KA25VA- E3 MFZ-KA25VA- E4

MFZ-KA35VA- E3 MFZ-KA35VA- E4

MFZ-KA50VA- E3 MFZ-KA50VA- E4

1. Fan motor has been changed.

MFZ-KA25VA- E4 MFZ-KA25VA- E5

MFZ-KA35VA- E4 MFZ-KA35VA- E5

MFZ-KA50VA- E4 MFZ-KA50VA- E5

1. Software has been changed for ERP.

(MFZ-KA25/35/50VA- E5 are the ERP models for Multi-series.)

Revision A:

• MFZ-KA25VA- E2 , MFZ-KA35VA- E2 and MFZ-KA50VA- E2 have been added.

• “Failure mode recall function” has been corrected.

• RoHS PARTS LIST has been added.

Revision B:

• MFZ-KA25VA- E3 , MFZ-KA35VA- E3 and MFZ-KA50VA- E3 have been added.

Revision C:

• Information for SUZ-KA25VA(H)R1.TH and SUZ-KA35VA(H)R1.TH has been added.

Revision E:

• MFZ-KA25VA- E5 , MFZ-KA35VA- E5 and MFZ-KA50VA- E5 have been added.

Revision D:

• MFZ-KA25VA- E4 , MFZ-KA35VA- E4 and MFZ-KA50VA- E4 have been added.

OB409E

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

OB409E

ACCESSORIES

REMOTE CONTROLLER

Drain hose

Remote controller holder

Fixing screw for 3.5 x 16 mm (Black)

Pipe cover

Band

Battery (AAA) for remote controller

Indoor unit mounting bracket

Fixing screw for 4 x 25 mm

Wood screw for the indoor unit fixation

Washer of

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

(This diagram shows an overall view.)

ra verall view.)

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

OB409E

3SPECIFICATION

Indoor model MFZ-KA25VA MFZ-KA35VA MFZ-KA50VA

Function Cooling Heating Cooling Heating Cooling Heating

Power supply Single phase

230 V, 50 Hz

Single phase

230 V, 50 Hz

Single phase

230 V, 50 Hz

Air ﬂow (Super High) m3/h

E3 522 E1

E3 546 546 570

E3 642 E1

E3 708

E4 ,E5 534 E4 ,E5 564 E4 ,E5 672 E4 ,E5 738

Air ﬂow (High/Med./Low) m3/h 426/348/288 456/372/300 444/366/300 468/372/312 552/474/426 588/528/444

Electrical

data

Breaker capacity A 10 10 10

Running current 1 A 0.2 0.2 0.2

Power input 1 W 25 25 25

Auxiliary heater A(kW) — — —

Power factor 1 % 54 54 54

Fan motor current 1 A 0.2 0.2 0.2

Fan

motor

Model (Upper)

E3 RC0J30-GA RC0J30-GA RC0J30-GA

E4 ,E5 RC0J30-KL RC0J30-KL RC0J30-KL

Model (Lower)

E3 RC0J30-HA RC0J30-HA RC0J30-HA

E4 ,E5 RC0J30-HC RC0J30-HC RC0J30-HC

Dimensions W x H x D mm 700 x 600 x 200 700 x 600 x 200 700 x 600 x 200

Weight kg 14 14 14

Special

remarks

Air direction 5 5 5

Sound level (Super High) dB(A) 37 38 43 44

Sound level (High/Med./Low) dB(A) 32/27/22 33/28/23 38/28/25 39/35/32

Upper

Fan speed (Super High) rpm

1,080

1,010

1,130

1,030

1,280

1,260

E4 ,E5

1,110

E4 ,E5

1,030

E4 ,E5

1,050

E4 ,E5

1,320

E4 ,E5

1,310

Fan speed (High/Med./Low) rpm 940/800/700 870/740/630 970/830/720 890/740/650

1,140/1,020/940

1,070/930/850

Lower

Fan speed (Super High) rpm

880

1,010

930

1,030

1,080

1,260

E4 ,E5

910

E4 ,E5

1,030

E4 ,E5

1,050

E4 ,E5

1,120

E4 ,E5

1,310

Fan speed (High/Med./Low) rpm 740/650/550 870/740/630 770/680/570 890/740/650

940/820/740 1,070/930/850

Fan speed regulator 4 4 4

Remote controller model KM05G KM05G KM05G

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): 5 m

1 Measured under rated operating frequency.

OB409E

Outdoor model

SUZ-KA25VA(H).TH

SUZ-KA25VA(H)R1.TH

SUZ-KA25VA2.TH

Indoor model

MFZ-KA25VA

SUZ-KA35VA(H).TH

SUZ-KA35VA(H)R1.TH

SUZ-KA35VA2.TH

Indoor model

MFZ-KA35VA

SUZ-KA50VA.TH

SUZ-KA50VA1.TH

Indoor model

MFZ-KA50VA

SUZ-KA50VAR2.TH

SUZ-KA50VA2.TH

Indoor model

MFZ-KA50VA

Function Cooling Heating Cooling Heating Cooling Heating Cooling Heating

Power supply Single phase

230 V, 50 Hz

Single phase

230 V, 50 Hz

Single phase

230 V, 50 Hz

Single phase

230 V, 50 Hz

Capacity Rated frequency(Min.~Max.)

2.5 (0.9 - 3.4) 3.4 (0.9 - 5.1) 3.5 (0.9 - 3.9) 4.0 (0.9 - 6.2) 4.8 (0.9 - 5.4) 6.0(0.9 - 7.9) 4.8 (0.9 - 5.4) 6.0(0.9 - 7.9)

Dehumidiﬁcation /h 1.2 1.7 2.5 2.5

Air ﬂow(High/Low) m3/h

25VA(H).TH 35VA(H).TH

2,940/1,650 2,940/2,210 2,940/1,650 2,940/2,210

1,890/1,746 2,058/1,506 1,896/1,668 1,956/1,356

25VA(H)R1.TH

25VA2.TH

35VA(H)R1.TH

35VA2.TH

1,806/1,806 2,106/1,452 1,872/1,086 2,016/1,386

Electrical

data

Starting current 1 A 4.0 5.0 8.5 8.5

Compressor motor current 1 A 2.3 3.5 4.5 4.5 6.5 8.0 6.5 8.0

Fan motor current 1 A 0.33 0.33 0.30 0.30

Coefﬁcient of performance (C.O.P) 1 4.31 4.07 3.21 3.64 3.10 3.23 3.10 3.23

Compressor

Model

25VA(H).TH

KNB073FDVH

35VA(H).TH

KNB092FCAH SNB130FLDH or

SNB130FLDH1 SNB130FGBH

25VA(H)R1.TH

25VA2.TH

KNB073FFDHC

35VA(H)R1.TH

35VA2.TH

KNB092FFAHC

Output W 550 650 850 900

Winding

resistance (at 20 ºC) Ω

25VA(H).TH

U-V 1.53

UW 1.53

V-W 1.53

35VA(H).TH

U-V 0.49

U-W 0.49

V-W 0.49 U-V 0.45

U-W 0.45

V-W 0.45

U-V 0.45

U-W 0.45

V-W 0.45

25VA(H)R1.TH

25VA2.TH

U-V 1.70

U-W 1.70

V-W 1.70

35VA(H)R1.TH

35VA2.TH

U-V 1.91

U-W 1.91

V-W 1.91

Fan

motor

Model RC0J50-AL RC0J50-AL RC0J60-AA RC0J60-AA

Winding

resistance (at 20 ºC) Ω

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

WHT-BLK 37.5

BLK-RED 37.5

RED-WHT 37.5

WHT-BLK 15.2

BLK-RED 15.2

RED-WHT 15.2

WHT-BLK 15.2

BLK-RED 15.2

RED-WHT 15.2

Dimensions W x H x D mm 800 x 550 x 285 800 x 550 x 285 840 x 850 x 330 840 x 850 x 330

Weight kg

25VA(H).TH

35VA(H).TH

53 53

25VA(H)R1.TH

25VA2.TH

35VA(H)R1.TH

35VA2.TH

Special

remarks

Sound level 1 dB 46 47 48 53 55 53 55

Fan speed

(High/Low, High/Med./Low) rpm

25VA(H).TH 35VA(H).TH

800/480 800/650 780/480 780/620

810/750 880/810/650 840/760 880/800/630

25VA(H)R1.TH

25VA2.TH

35VA(H)R1.TH

35VA2.TH

740/740 860/740/600 810/490 870/770/610

Fan speed regulator 2 3 2 3 2 2

Refrigerant ﬁlling

capacity (R410A) kg 0.90 1.05 1.60 1.60

Refrigerating oil (Model) L

0.32 (NEO22) 0.32 (NEO22) FLDH: 0.45 (NEO22)

FLDH1: 0.60 (NEO22) 0.45 (NEO22)

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): 5 m

1 Measured under rated operating frequency.

OB409E

T3.15AL 250 V

12 V 250 Ω

12 V 250 Ωor 12 V 300 Ω

12 V 300 Ω

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 rated conditions of main electric parts

OB409E

4NOISE CRITERIA CURVES

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

Test conditions,

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

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

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

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

Test conditions,

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

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

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

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

Test conditions,

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

COOLING

FUNCTION

SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

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

NC-10

MFZ-KA25VA

INDOOR UNIT

WALL

1m 1m

MICROPHONE

MFZ-KA35VA

MFZ-KA50VA

OB409E

Wireless remote controller

162

19 60

125

147

454155

110

337 337

363

333210

593

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

54 506 140

607

100mm or more

OUTLINES AND DIMENSIONS

Unit: mm

INDOOR UNIT

MFZ-KA25VA

MFZ-KA35VA

MFZ-KA50VA

OB409E

6WIRING DIAGRAM

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- E1 ,E2

MFZ-KA35VA- E1 ,E2

MFZ-KA50VA- E1 ,E2

: Terminal block, : Connector

MFZ-KA25VA- E3 ,E4

MFZ-KA35VA- E3 ,E4

MFZ-KA50VA- E3 ,E4

OB409E

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