Mitsubishi Electric KA60VA Service manual

OC321A.qxp 06.8.28 3:45 PM Page 1

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

September 2006

No.OC321

REVISED EDITION-B

Indoor unit

[Model names]

SEZ-KA35VA

SEZ-KA50VA

SEZ-KA60VA

SEZ-KA71VA

[Service Ref.]

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

Revision:

•RoHS PARTS LIST is added in REVISED EDITION-B.

•Some descriptions have been modified.

•Please void OC321

REVISED EDITION-A.

Note:

• This manual describes only service data of the indoor units.When servicing outdoor units, please refer to the service manual

No.OC322, OC323 together with this manual.

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

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

INDOOR UNIT

Model name indication

CONTENTS

1. PART NAMES AND FUNCTIONS ········2

2. SPECIFICATIONS·································4

3. OUTLINES AND DIMENSIONS············9

4. WIRING DIAGRAM·····························10

5. REFRIGERANT SYSTEM DIAGRAM·······11

6. TROUBLESHOOTING ························12

7. DISASSEMBLY PROCEDURE···········22

8. PARTS LIST········································25

9. RoHS PARTS LIST·····························27

10. OPTIONAL PARTS ·····························29

TEMP.

ON/OFF

WIRED REMOTE

CONTROLLER

OC321A.qxp 06.8.28 3:45 PM Page 2

1 PART NAMES AND FUNCTIONS

Indoor Unit

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

Air outlet

Air outlet duct flange

Air inlet

(Selecting the either back side or bottom side)

Wired remote controller

Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button.

●

Operation buttons

Start/Stop button

Fan Speed button

Set Temperature buttons

Down

Up

Timer Menu button

(Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button

(Set Day button)

Opening the door

TEMP.

ON/OFF

MENU

BACK MONITOR/SET

PAR-21MAA

ON/OFF

DAY

CLOCK OPERATION

FILTER

CHECK TEST

CLEAR

Filter button

(<return sign> button)

Test Run button

Service button (Clear button)

Airflow Up/Down button

Louver button

( Operation button)

To preceding operation number

Ventilation button

( Operation button)

To next operation number

2

OC321A.qxp 06.8.28 3:45 PM Page 3

● Display

For purposes of this explanation, all parts of the display are shown as lit. During actual operation, only the relevant items will be lit.

Identifies the current operation

Shows the operating mode, etc.

* Multilanguage display is supported.

“Centrally Controlled” indicator

Indicates that operation of the remote controller has been prohibited by a master controller.

“Timer Is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

˚F˚C

TIME SUN MON TUE WED THU FRI SAT

TIMER Hr ON

AFTER AFTER OFF

ERROR CODE

˚F˚C

ONLY1Hr.

FUNCTION

FILTER

WEEKLY

SIMPLE

AUTO OFF

“Sensor” indication

Displayed when the remote controller sensor is used.

Day-of-Week

Shows the current day of the week.

Time/Timer Display

Shows the current time, unless the simple or Auto Off timer is set.

If the simple or Auto Off timer is set, shows the time remaining.

Up/Down Air Direction indicator

The indicator shows the direction of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to

Low and downward during COOL or DRY mode. (Operation varies according to model.)

The indicator goes off after one hour, at which time the airflow direction also changes.

Room Temperature display

Shows the room temperature.

Louver display

Indicates the action of the swing louver. Does not appear if the louver is stationary.

(Power On indicator)

Indicates that the power is on.

“Locked” indicator

Indicates that remote controller buttons have been locked.

“Clean The Filter” indicator

Comes on when it is time to clean the filter.

Timer indicators

The indicator comes on if the corresponding timer is set.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in

Ventilation mode.

Caution

● Only the Power on indicator lights when the unit is stopped and power supplied to the unit.

● If you press a button for a feature that is not installed in the indoor unit, the remote controller will display the “Not Available” message.

If you are using the remote controller to operate multiple indoor units, this message will appear only if the feature is not present at the parent unit.

● When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indication (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappears then start the operation.

3

OC321A.qxp 06.8.28 3:45 PM Page 4

2 SPECIFICATIONS

Indoor model

Function

Power supply

Capacity Air flow (High/Low)

Power outlet

Running current ✽ 1

Power input Rated frequency

Auxiliary heater

Fan motor current ✽ 1

Model

Winding resistance (at20 : )

Dimensions W o H o D

Weight

Air direction

Sound level (High/Low)

Fan speed (High/Low)

Fan speed regulator

External satatic pressure

Thermistor TH1 (at 25 : )



K /h

A

A

W

A(kW)

A

" mm kg dB(A) rpm

Pa k k k

"

"

"

SEZ-KA35VA.TH

Cooling

Single phase

230V, 50Hz

780/600

10

0.40

Heating

60

—

0.22

PK6V19-EF

WHT-BLK : 257 BLK-BLU : 20

BLU-YLW : 27 YLW-BRN : 14

BRN-RED : 51(at 26 : )

1100 o 270 o 700

33.5

1

35/30

770/630

3

Std : 30 Max : 50

10

10

10

NOTE : Test conditions are based on ISO 5151

Cooling : Indoor D.B. 27 : W.B. 19 :

Outdoor D.B. 35 : W.B. 24 :

Heating : Indoor D.B. 20 : W.B. 15 :


Refrigerant piping length (one way): 5m

✽ 1 Measured under rated operating frequency.

SEZ-KA50VA.TH

Cooling Heating

Single phase

230V, 50Hz

1020/720

20

0.55

80

—

0.27

PK6V32-EF



BRN-RED : 40(at 26 : )

1100 o 270 o 700

33.5

1

39/31

840/640

3

Std : 30 Max : 50

10

10

10

Specifications and rating conditions of main electric parts

INDOOR UNIT

Model

Item

Indoor fan capacitor

Fuse

Varistor

(C1)

(FUSE)

(ZNR)

Terminal block

Indoor fan motor thermal fuse

(TB)

SEZ-KA35VA.TH SEZ-KA50VA.TH SEZ-KA60VA.TH SEZ-KA71VA.TH

SEZ-KA35/50VA.TH : 2.5

+ 440V SEZ-KA60VA.TH : 3.0

+ 440V SEZ-KA71VA.TH : 4.0

+ 440V

250V 6.3A

ERZV10D471

TO OUTDOOR UNIT : 3P TO WIRED REMOTE CONTROLLER : 2P

141 : i

3 :

4

OC321A.qxp 06.8.28 3:45 PM Page 5

Indoor model

Function

Power supply

Capacity Air flow (High/Low)

Power outlet

Running current ✽ 1

Power input Rated frequency

Auxiliary heater

Fan motor current ✽ 1

Model

Winding resistance

Dimensions W o H o D

Weight

Air direction

Sound level(High/Low)

Fan speed(High/Low)

Fan speed regulator

External satatic pressure




K /h

A

A

W

A(kW)

A

" mm kg dB(A) rpm

Pa k k k

"

"

"

SEZ-KA60VA.TH

Cooling

Single phase

230V, 50Hz

1200/720

20

0.65

Heating

100

—

0.39

PK6V50-EF



BRN-RED : 29 (at 26 : )

1100 o 270 o 700

33.5

1

43/32

890/660

3

Std : 30 Max : 50

10

10

10

NOTE : Test conditions are based on ISO 5151

Cooling : Indoor D.B. 27 : W.B. 19 :


Heating : Indoor D.B. 20 : W.B. 15 :


Refrigerant piping length (one way): 5m

✽ 1 Measured under rated operating frequency.

SEZ-KA71VA.TH

Cooling

Single phase

230V, 50Hz

1200/720

20

0.60

Heating

130

—

0.51

PK4V60-EA



BRN-RED : 34 (at 26 : )

1100 o 270 o 700

35

1

43/32

1050/690

3

Std : 30 Max : 50

10

10

10

5

OC321A.qxp 06.8.28 3:45 PM Page 6

NOISE CRITERION CURVES

SEZ-KA35VA.TH

NOTCH

High

Low

<50Hz>

SPL(dB)

35

30

LINE

90

80

SEZ-KA50VA.TH

90

80

NOTCH

High

Low

<50Hz>

SPL(dB)

39

31

LINE

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

TERESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000

BAND CENTER FREQUENCIES, Hz

4000 8000

SEZ-KA60VA.TH

SEZ-KA71VA.TH

NOTCH

High

Low

<50Hz>

SPL(dB)

43

32

LINE

90

70

NC-70

60

NC-60

50

NC-50

40

NC-40

30

20

10

NC-30

APPROXIMATE

TERESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125 250 500 1000 2000


4000

NC-20

8000

80

UNIT

70

NC-70

60

NC-60

External static

pressure 30Pa

1.5m

50

NC-50

40

MICROPHONE

NC-40

30

NC-30

20

10

APPROXIMATE

TERESHOLD OF

HEARING FOR

CONTINUOUS

NOISE

63 125

NC-20

250 500 1000 2000


4000 8000

NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level can be higher by about 2 dB than the displayed level during cooling and heating operation.

6

OC321A.qxp 06.8.28 3:45 PM Page 7

INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW

SEZ-KA35VA.TH

Corrected Air flow

Cooling

1.1

Fan Performance

Recommended range 1.0

80

0.9

0.8

60 5

Heating

10 15

Air flow ( K / X )

20

40

1.3

20

1.2

1.1

1.0

0

5 7 10 15

Air flow ( K / X )

20 25

0.9

0.8

5 10 15

Air flow ( K / X )

20

SEZ-KA50VA.TH

Corrected Airflow

Cooling

Fan Performance

Recommended range

1.1

80

60

1.0

0.9

0.8

5

Capacity

Input

25

25

Capacity

Input

10 15

Air flow ( K / X )

20 25

40

Heating

20

1.2

1.1

0

5 10 15 20

Air flow ( K / X )

25

1.0

0.9

0.8

5 10 15

Air flow ( K / X )

20 25

7

OC321A.qxp 06.8.28 3:45 PM Page 8

INDOOR FAN PERFORMANCE AND CORRECTED AIR FLOW

SEZ-KA60VA.TH

80

60

40

Fan Performance

Recommended range

20

0

5 10 15

Air flow ( K / X )

20 25

1.3

1.2

1.1

1.0

0.9

1.1

1.0

0.9

0.8


Cooling

Capacity

Input

10 15 20

Air flow ( K / X )

Heating

25 30

10 15 20

Air flow ( K / X )

25 30

SEZ-KA71VA.TH

Fan Performance

Recommended range

80

60

40

20

0

5 10 15

Air flow ( K / X )

20 25

1.3

1.2

1.1

1.0

0.9

1.1

1.0

0.9

0.8


Cooling

Capacity

Input

10 15 20

Air flow ( K / X )

Heating

25 30

10 15 20

Air flow ( K / X )

25 30

8

OC321A.qxp 06.8.28 3:45 PM Page 9

3 OUTLINES AND DIMENSIONS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

Air inlet (rear side) dimensions

42 930

(Inlet size)

In case of bottom side suction, mount the PLATE (A) on the rear side.

After installation, remove the transportation support PLATE (B).

Unit : mm

Air inlet (bottom side) dimensions

PLATE (A)

29

77.5

100

50

27

7 x 100=700

955

24{ 2.9 holes

1016

Air inlet

(rear side) w Select the either back side or bottom side.

PLATE (B) x 2

150

77

450

Electrical parts box

51 930

(Inlet size)

39 77.5

100 7 x

100=700

955

24{ 2.9 holes

Access door

Service space

(It is necessary to maintain a working

service area from the ceiling.)

Suspension bolt

M10 or 3/8

(procure locally)

40

50

100 7 x

100=700

9 x 2{ 2.9 holes

880

Air outlet

1070

Suspension bolt pitch

(1070)

(Suspension bolt pitch)


(10) 50

Refrigerent pipe (gas)

Refrigerent pipe (liquid)

Wiring entry

Terminal block


1100

Air inlet

(bottom side)

Access door w Select the either back side or bottom side.

2 x 2holes

{ 2.9


94 80

350


Drain plug R1 (male)

Models

SEZ-KA35VA

SEZ-KA50VA

SEZ-KA60VA

SEZ-KA71VA

Refrigerent pipe

(liquid)

{ 6.35mm

flared connection

1/4F

{ 6.35mm

flared connection

1/4F

{ 6.35mm

flared connection

1/4F

{ 9.52mm

flared connection

3/8F

Refrigerent pipe

(gas)

{ 9.52mm

flared connection

3/8F

{ 12.7mm

flared connection

1/2F

{ 15.88mm

flared connection

5/8F

{ 15.88mm

flared connection

5/8F

9

OC321A.qxp 06.8.28 3:45 PM Page 10

4 WIRING DIAGRAM

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

MF

TB4

S1

S2

S3

TO OUTDOOR

UNIT

C1

ORN

RED

1 2 3 4 5 6

1 2 3 4 5 6

7

7

8

8

<fig: w

1>

MODELS

KA35

KA50

KA60

KA71

SW2

ON

OFF

1 2 3 4 5

ON

OFF

1 2 3 4 5

ON

OFF

1 2 3 4 5

ON

OFF

1 2 3 4 5

1 2 3 4 5 6 7

WHT

(FAN)

FAN

X6 X5 X4

X6 X5 X4

SWE

ON

OFF

SW2

ON

OFF

1 2 3 4 5

SW3

ON

OFF

1 2 3 4 5

CN32

CN2L

CN51 CN41

See fig: w

1

[LEGEND]

SYMBOL

P.B

I.B

CN2L

CN32

CN41

SWE

X4

X5

X6

ZNR

CN51

CN90

FUSE

LED1

LED2

LED3

SW2

SW3

NAME

INDOOR POWER BOARD

INDOOR CONTROLLER BOARD

CONNECTOR(LOSSNAY)

CONNECTOR(REMOTE SWITCH)

CONNECTOR(HA TERMINAL-A)

CENTRALLY CONTROL

CONNECTOR(WIRELESS)

FUSE(T6.3AL250V)

POWER SUPPLY(I.B)

POWER SUPPLY(I.B)

TRANSMISSION(INDOOR-OUTDOOR)

SWITCH(CAPACITY CODE)

SWITCH(MODE SELECTION)

SWITCH(EMERGENCY OPERATION)

RELAY(FAN MOTOR LL)

RELAY(FAN MOTOR Lo)

RELAY(FAN MOTOR Hi)

VARISTOR

SYMBOL

C1

MF

TB4

TB15

TH1

TH2

TH5

NAME

CAPACITOR(FAN MOTOR)

FAN MOTOR

TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE)

TERMINAL BLOCK(REMOTE CONTROLLER

TRANSMISSION LINE)

ROOM TEMP.THERMISTOR

(0 ° C/15k Ω ,25 ° C/5.4k

Ω DETECT)

PIPE TEMP.THERMISTOR/LIQUID

(0

°

C/15k

Ω

,25

°

C/5.4k

Ω

DETECT)

COND./EVA.TEMP.THERMISTOR

(0

°

C/15k

Ω

,25

°

C/5.4k

Ω

DETECT)

NOTES: 1.Since the outdoor side electric wiring may change be sure to

check the outdoor unit electric wiring for servicing.

2.Indoor and outdoor connecting wires are made with polarities,make

wiring matching terminal numbers(S1,S2,S3).

3.Symbols used in wiring diagram above are, :Connector, :Terminal(block).

4.Since the indoor fan motor(MF) is connected with 50Hz power,

if 60Hz power is used, change the wiring connection shown in

fig: w 2.

<fig: w 2>

50

Indoor Fan Motor(MF) for 60Hz

BLUE 60

YELLOW

BLUE w For details on how to operate self-diagnosis,

refer to the technical manuals etc.

10

CN90

P.B

1 2 3 AC220-240V

CNSK(RED)

1 3

RED

(POWER

BOARD)

CNDK

FUSE

1 3

ORN

(POWER)

CND

LED3

1 3

BLU

(CONTROL)

CN3C

I.B

TRANS

ZNR

WHT

(POWER

BOARD)

CN2D

1

2

BLK

WHT

LED1

BLK

CN29

RED

(2 PHASE) (INTAKE)

CN20

1 2 1 2

LED2

WHT

(LIQUID)

CN21

1 2

BLU

(REMOCON)

CN22

1 2

1 2

DC13.1V

CN2S(WHT)

TH5 TH1 TH2

TB15

1

2

} TO MA-REMOTE

CONTROLLER

DC8.7-13V

OC321A.qxp 06.8.28 3:45 PM Page 11

5 REFRIGERANT SYSTEM DIAGRAM

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

Heat exchanger

Condenser/evaporator temperature thermistor

(TH5)

Strainer

#50

Refrigerant GAS pipe connection

(Flare)

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant LIQUID pipe connection

(Flare)

Room temperature thermistor (TH1)

Distributor with strainer

#50

Pipe temperature thermistor/liquid

(TH2)

Strainer

#50

11

OC321A.qxp 06.8.28 3:45 PM Page 19

6-5. TEST POINT DIAGRAM

6-5-1. Indoor power board

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

CN2S

Connect to the indoor controller board (CN2D) between 1 to 3 12.6-13.7V DC (Pin 1 (+))

CNSK

Connect to the indoor controller board

(CNDK) between 1 to 3 220-240V AC

19

OC321A.qxp 06.8.28 3:45 PM Page 20

6-5-2. Indoor controller board

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

CN3C

Transmission

(Indoor/outdoor)

(0~24V DC)

Non polarity

CND

Power supply input

(220~240V AC)

CN2D

Connector to the indoor power board (CN2S)

(12.5~13.7V DC)

LED1

Power supply

(I.B)

LED2

Power supply

(R.B)

LED3

Transmission

(Indoor/outdoor)

–

–

CN22

}

Remote controller connecting wire

(10.4~14.6V DC)

CN20


CN21

Pipe temperature thermistor/Liquid

(TH2)

FUSE

(6.3A 250V)

CNDK

Connect to the indoor power board (CNSK)

(220~240V AC)

CN29


(TH5)

CN41

Connector

(HA terminal-A)

FAN

Fan motor output

CN51

Centrally control

CN2L

Connector

(LOSSNAY)

Jumper connector

J11~J15

Unit setting

SW3

Mode selection

SWE

Emergency operation

SW2

Capacity setting

20

OC321A.qxp 06.8.28 3:45 PM Page 21

6-6. TROUBLE CRITERION OF MAIN PARTS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

Part name

Room temperature thermistor

(TH1)

Pipe temperature thermistor/liquid

(TH2)


(TH5)

Indoor fan motor

(MF)

Check method and criterion

Measure the resistance with a tester.

(Part temperature 10

°

C ~ 30

°

C)

Normal

8k

Ω

~20k

Ω

Abnormal

Opened or short-circuited

P

BLK BLU YLW BRN RED ORN

WHT

P : Thermal fuse

141

±

3˚C

GRN

YLW

Measure the resistance between the terminals with a tester.

(Coil wiring temperature 10

°

C ~ 30

°

C)

WHT-BLK

BLK-BLU

BLU-YLW

YLW-BRN

BRN-RED

KA35VA

270~244

Ω

19~21

Ω

25~29

Ω

13~15

Ω

48~54

Ω

Normal

KA50VA

157~175

Ω

49~55

Ω

18~20

Ω

7~9

Ω

38~42

Ω

KA60VA

97~109

Ω

54~60

Ω

14~16

Ω

6~8

Ω

27~31

Ω

KA71VA

103~113

Ω

28~30

Ω

25~27

Ω

13~15

Ω

32~36

Ω

Abnormal

Opened or short-circuited

21

OC321A.qxp 06.8.28 3:45 PM Page 22

7 DISASSEMBLY PROCEDURE

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

OPERATING PROCEDURE

1. Removing the electrical parts

(1) Remove 2 screws of electrical cover and electrical parts cover.

(See Photo 1)

● Indoor controller board (I.B)

● Terminal block (TB4,TB15)

● Indoor power board (P.B)

● Fan motor capacitor (C1)

(See Photo 2)

Photo 1

PHOTOS

Service panel

(Pipe temperature thermistor / liquid)

Electrical parts cover

Drain pan Set screws

2. Removing the pipe temperature thermistor (TH2)

(1) Remove the electrical parts cover. (Refer to 1)

(2) Remove 2 screws of service panel and service panel.

(See Photo 3)

(3) Remove the thermistor (TH2) from the holder.

(See Photo 4)

(4) Remove the connector (CN21) from the indoor controller board and pull the white wire of thermistor

(TH2) out.

Service panel

(Condenser / evaporator temperature thermistor)

Set screws

(for drain pan)

Front panel

Photo 2

Terminal block (TB15)

Terminal block (TB4)

Indoor controller box

Fan motor capacitor

3. Removing the condenser / evaporator temperature thermistor (TH5)


(2) Remove the service panel. (See Photo 3)


(See Photo 4)

(4) Remove the connector (CN29) from the indoor controller board and pull the black wire of thermistor

(TH5) out.

Indoor controller board Indoor power board

Photo 3

Screws

Photo 4

Pipe temperature thermistor / liquid

(TH2)

Service panel

22

Screws Condenser / evaporator temperature thermistor (TH5)

OC321A.qxp 06.8.28 3:45 PM Page 23


4. Removing the room temperature thermistor (TH1)


(2) Remove 12 screws of front panel and the front panel at fan side.

(See Photo 1)

(3) Remove the thermistor (TH1) from the separator panel.

(See Photo 6)

(4) Disconnect the connector (CN20)from the indoor controller board and pull the lead wire of thermistor (TH1) out.

Photo 5

Claws

PHOTOS

Motor bands

Photo 6

Claws

Screws

Fan casing

Fan casing

Fan motor

Separator panel

Fan motor

5. Removing the sirocco fan and the fan motor (MF).


(2) Remove 12 screws of front panel and the front panel at fan side. (See Photo 1)

(3) Disconnect the connector of the fan motor lead wire.

(See Photo 2)

(4) Undo the 4 claws and remove the fan claws.(down side)

<Either left or right> (See Photo 5)

(5) Remove the motor bands.

<A screw each on left and right.> (See Photo 5)

(6) Disconnect the earth wire from the fan motor leg.

(See Photo 7)

(7) Remove the fan motor and the sirocco fan by assembly.

(See Photo 7)

(8) Unscrew set screw and remove the sirocco fan.

<Either left or right> (See Photo 7)

Photo 7


Set screw

Earth wire

23

OC321A.qxp 06.8.28 3:45 PM Page 24


6. Removing the drain pan

(1) Unscrew each set screw on the right and left, and remove the drain pan pushing it toward the the back.

(See Photo 1)

Photo 8

PHOTOS

Screws

7. Removing the heat exchanger

(1) Remove the drain pan. (Refer to 6)

(2) Remove the 16 screws and the Under flange at heat exchanger side. (See Photo 8)

(3) Remove the 4 screws of heat exchanger.( 2 screws each on left and right) (See Photo 9)


(Refer to 2)


(Refer to 3)

(6) Remove the 3 screws and the service panel.

(See Photo 9)

(7) Put the heat exchanger down to the fan motor and pull it toward you.

(See Photo 9)

Under flange

Photo 9

Screws for heat exchanger

Service panel

Screws for service panel

24

Heat exchanger

OC321A.qxp 06.8.28 3:45 PM Page 25

8 PARTS LIST (non-RoHS compliant)

INDOOR UNIT

STRUCTURAL PARTS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

1

15 14 13 12

2

3

11

10

9

8

7

4 5 6

No.

Parts No.

Parts name Specification

1 E07 039 086 LEFT SIDE PANEL

2 E07 039 500 SIROCCO FAN

3 E02 179 505 FAN MOTOR RUBBER MOUNT

E07 039 300 FAN MOTOR PK6V19-EF

4

E07 040 300 FAN MOTOR

E07 041 300 FAN MOTOR

PK6V32-EF

PK6V50-EF

E07 223 300 FAN MOTOR

5 E07 159 308 ROOM TEMPERATURE THERMISTOR

PK4V60-EA

6 E07 039 000 FRONT PANEL

7

8

9

E07 039 700 DRAIN PAN

E07 154 309

CONDENSER / EVAPORATOR

TEMPERATURE THERMISTOR

E07 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID

E07 143 620 INDOOR HEAT EXCHANGER

10

E07 144 620

E07 145 620

INDOOR HEAT EXCHANGER

INDOOR HEAT EXCHANGER


11 E07 039 808 RIGHT LEG

12 E07 143 085 RIGHT SIDE PANEL

13 E07 143 293 SEPARATOR ASSY

14 E07 039 809 LEFT LEG

15 E07 039 290 BASE

1

2

1

2

1

1

1

1

1

1

1

2

2

1

Q'ty/set

35

SEZ-KA · VA.TH

50 60 71

1 1 1 1

2

2

2

2

2

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

1

1

2

1

2

1

1

2

1

1

2

1

1

2

1

Remarks

(Drawing No.)

<2PCS/SET>

Wiring

Diagram

Recommended

Symbol Q'ty

Price

Unit Amount

MF

MF

MF

MF

TH1

TH5

TH2

25

OC321A.qxp 06.8.28 3:45 PM Page 26

INDOOR UNIT

ELECTRICAL PARTS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

6

7

5

4

TEMP.

ON/OFF

8

9

3

1

2

Part numbers that is circled is not shown in the figure.

No.

Parts No.


1

E07 159 447 INDOOR CONTROLLER BOARD




2

3

E02 661 385 VARISTOR

E07 006 382 FUSE

4 E07 154 440 INDOOR POWER BOARD

250V/6.3A

5

E02 063 351 FAN MOTOR CAPACITOR 2.5

+ /440VAC


+ /440VAC

6

7


+ /440VAC

E07 156 375 TERMINAL BLOCK 2P

E07 162 375 TERMINAL BLOCK 3P

8

9

E07 159 426 REMOTE CONTROLLER

E07 018 089 REMOTE CONTROLLER CABLE

10 E07 039 449 CONTROLLER COVER

1

1

1

1

1

1

1

1

1

35

1

Q'ty/set

SEZ-KA ·VA.TH

50 60 71

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

(Drawing No.)

Wiring Recom-

Diagram mended

Symbol Q'ty

Price

Unit Amount

P.B

C1

C1

C1

TB15

TB4

R.B

I.B

I.B

I.B

I.B

ZNR

FUSE

26

OC321A.qxp 06.8.28 3:45 PM Page 27

9 RoHS PARTS LIST

INDOOR UNIT

STRUCTURAL PARTS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

1

15 14 13 12

11

2

3

10

9

8

7

4 5 6

No.

Parts No.


1

2

3

4

5

6

7

8

9

G E17 039 086 LEFT SIDE PANEL

G E17 039 500 SIROCCO FAN

G E12 179 505 FAN MOTOR RUBBER MOUNT

G E17 039 300 FAN MOTOR PK6V19-EF



G E17 223 300 FAN MOTOR PK4V60-EA

G E17 159 308 ROOM TEMPERATURE THERMISTOR

G E17 039 000 FRONT PANEL

G

G

G

E17 039 700 DRAIN PAN

E17 154 309

CONDENSER / EVAPORATOR

TEMPERATURE THERMISTOR

E17 159 307 PIPE TEMPERATURE THERMISTOR / LIQUID

G E17 143 620 INDOOR HEAT EXCHANGER

10

G

G



G E17 223 620 INDOOR HEAT EXCHANGER

11 G E17 039 808 RIGHT LEG

12 G E17 143 085 RIGHT SIDE PANEL

13 G E17 143 293 SEPARATOR ASSY

14 G E17 039 809 LEFT LEG

15 G E17 039 290 BASE

1

2

1

2

1

1

1

1

1

1

1

2

2

1

Q'ty/set

35

SEZ-KA · VA.TH

50 60 71

1 1 1 1

2

2

2

2

2

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

1

1

2

1

2

1

1

2

1

1

2

1

1

2

1

Remarks

(Drawing No.)

<2PCS/SET>

Wiring Recom-

Diagram mended

Symbol Q'ty

Price

Unit Amount

MF

MF

MF

MF

TH1

TH5

TH2

27

OC321A.qxp 06.8.28 3:45 PM Page 28

INDOOR UNIT

ELECTRICAL PARTS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

6

7

5

4

TEMP.

ON/OFF

8

9

3

1

2

Part numbers that is circled is not shown in the figure.

No.

Parts No.


G E17 159 447 INDOOR CONTROLLER BOARD


1



2

3

4

5

G E12 661 385 VARISTOR

G E17 006 382 FUSE 250V/6.3A

G E17 154 440 INDOOR POWER BOARD

G E12 063 351 FAN MOTOR CAPACITOR 2.5

+ /440VAC


+ /440VAC

6


+ /440VAC

G E17 156 375 TERMINAL BLOCK 2P

7 G E17 162 375 TERMINAL BLOCK

8 G E17 159 426 REMOTE CONTROLLER

9 G E17 018 089 REMOTE CONTROLLER CABLE

10 G E17 039 449 CONTROLLER COVER

3P

1

1

1

1

1

1

1

1

1

Q'ty/set

SEZ-KA ·VA.TH

35 50 60 71

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

(Drawing No.)

Wiring Recom-

Diagram mended

Symbol Q'ty

Price

Unit Amount

I.B

I.B

I.B

I.B

ZNR

FUSE

P.B

C1

C1

C1

TB15

TB4

R.B

28

OC321A.qxp 06.8.28 3:45 PM Page 29

10 OPTIONAL PARTS

AIR FILTER

Applied unit

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

Models

PAC - 1000 FT

29

OC321A.qxp 06.8.28 3:45 PM Page 30

30

OC321A.qxp 06.8.28 3:45 PM Page 31

31

OC321A.qxp 06.8.28 3:45 PM Page 32

TM

HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.

Distributed in Sep. 2006 No.OC321 REVISED EDITION-B PDF 7

Distributed in Oct. 2005 No.OC321 REVISED EDITION-A PDF 8

Distributed in Feb. 2005 No.OC321 PDF 8

Made in Japan

New publication, effective Sep. 2006

Specifications subject to change without notice.

Mitsubishi Electric KA60VA Service manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

September 2006

No.OC321

REVISED EDITION-B

1 PART NAMES AND FUNCTIONS

Wired remote controller

Operation buttons

2 SPECIFICATIONS

NOISE CRITERION CURVES

3 OUTLINES AND DIMENSIONS

4 WIRING DIAGRAM

5 REFRIGERANT SYSTEM DIAGRAM

–

–

7 DISASSEMBLY PROCEDURE

Photo 1

Photo 2

Photo 3

Photo 4

Photo 5

Photo 6

Photo 7

Photo 8

Photo 9

8 PARTS LIST (non-RoHS compliant)

INDOOR UNIT

ELECTRICAL PARTS

SEZ-KA35VA.TH

SEZ-KA50VA.TH

SEZ-KA60VA.TH

SEZ-KA71VA.TH

9 RoHS PARTS LIST

10 OPTIONAL PARTS

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