Mitsubishi SLZ-KA25VA, SLZ-KA35VA, SLZ-KA50VA, SLZ-KA25VAL, SLZ-KA25VAL2 Technical & Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

ON/OFF

RESET

TOO

WARM

TOO
COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

TECHNICAL & SERVICE MANUAL

Indoor unit
[Model names] [Service Ref.]

SLZ-KA25VA SLZ-KA25VA.TH

SLZ-KA25VA

SLZ-KA35VA SLZ-KA35VA.TH

SLZ-KA35VA

SLZ-KA50VA SLZ-KA50VA.TH

SLZ-KA50VA

SLZ-KA25VAL SLZ-KA25VAL.TH

SLZ-KA25VAL

SLZ-KA35VAL SLZ-KA35VAL.TH

SLZ-KA35VAL

SLZ-KA50VAL SLZ-KA50VAL.TH

SLZ-KA50VAL

1.TH

1.TH

1.TH

1.TH

1.TH

1.TH

July 2007

No. OC320

REVISED EDITION-B

Revision:

• SLZ-KA25/35/50VA(L)1.TH
are added in REVISED
EDITION-B.

• Some descriptions have
been modified.

•Please void OC320 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 or OC323
together with this manual.

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

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

Model name
indication

SLZ-KA25,35,50VAL.TH

SLZ-KA25,35,50VAL1.TH

REMOTE CONTROLLER

INDOOR UNIT

TEMP.

SLZ-KA25,35,50VA.TH

SLZ-KA25,35,50VA1.TH

ON/OFF

CONTENTS

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

2. PART NAMES AND FUNCTIONS·······3

3. SPECIFICATIONS································6

4. OUTLINES AND DIMENSIONS ···········8

5. WIRING DIAGRAM ····························11

6.

REFRIGERANT SYSTEM DIAGRAM

7. TROUBLESHOOTING·······················13

8. 4-WAY AIR FLOW SYSTEM ··············25

9. DISASSEMBLY PROCEDURE··········27

10. PARTS LIST·······································30

11. RoHS PARTS LIST ····························34

······12

1

TECHNICAL CHANGES

SLZ-KA25VAL.TH ➔ SLZ-KA25VAL1.TH

SLZ-KA35VAL.TH ➔ SLZ-KA35VAL1.TH
SLZ-KA50VAL.TH ➔ SLZ-KA50VAL1.TH
SLZ-KA25VA.TH ➔ SLZ-KA25VA

1.TH

SLZ-KA35VA.TH ➔ SLZ-KA35VA1.TH
SLZ-KA50VA.TH ➔ SLZ-KA50VA1.TH

• PANELhas been changed.
SLP-2AL ➔ SLP-2ALW
SLP-2AA ➔ SLP-2AAW
(White : 0.70Y 8.59/0.97) ➔ (Pure white : 6.4Y 8.9/0.4)

2

2

Auto Air Swing Vane
Disperses airflow up and

down and adjusts the angle
of airflow direction.

Grille

Filter
Removes dust and pollutants

from inhaled air.

Horizontal Air Outlet
Sets horizontal airflow automatically

during cooling or dehumidifying.

Air Intake
Inhales air from room.

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

h

ON / OFF button

To start and to stop operation.

VANE CONTROL button

To change the airflow
direction.

FAN SPEED button

To set fan speed to Low,
Medium or High.

TIMER SELECT button

To set time to start or stop
unit operation.

TEMPERATURE
SETTING button

To set any

desired room

temperature.

MODE SELECT button

To change the operation
mode; Auto, Cooling ,
Heating and Drying . (SLZ)

PART NAMES AND FUNCTIONS

Indoor Unit
SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

Wireless remote comtroller
SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VAL1.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL1.TH

Attention:

• Avoid pushing buttons with fingernails and other sharp objects. Sharp objects may damage remote controller.

3

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Temperature setting 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
lid

ON/OFF button

Fan Speed button

Filter button
(<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button
( Operation button)

T o return operation
number

Ventilation button
( Operation button)

To go to next operation
number

Built-in temperature sensor

● Wired remote controller

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

SLZ-KA25VA.TH SLZ-KA25VA1.TH
SLZ-KA35VA.TH SLZ-KA35VA1.TH
SLZ-KA50VA.TH SLZ-KA50VA1.TH

4

●

●

˚F˚C

˚F˚C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

ON
OFF

Hr
AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

Note:

“PLEASE WAIT” message
This message is displayed for approximately 3 minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure.
“NOT AVAILABLE” message
This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have).
If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as
far as any of the indoor units is equipped with the function.

Display Section

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 available.

“Centrally Controlled” indicator

Indicates that operation from 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.

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, the time to be
switched off is shown.

“Sensor” indication

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but­tons have been locked.

“Clean The Filter” indicator

To be displayed on when it is time to
clean the filter.

Timer indicators

The indicator comes on if the corre­sponding timer is set.

Up/Down Air Direction indica­tor

Shows the direction of the
outcoming airflow.

“One Hour Only” indicator

Room Temperature display

Shows the room temperature. The room
temperature display range is 8~39:.
The display blinks if the temperature
is less than

8: or 39:

or more.

Louver display

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

(Power On indicator)

Indicates that the power is on.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in
Ventilation mode.

Displayed if the airflow is set to
low or downward during COOL
or DRY mode. (Operation varies
according to model.)
The indicator goes off in one hour,
when the airflow direction also
changes.

● Wired remote controller

5

3

SLZ-KA25VAL(1).TH

SLZ-KA25VA

(1).TH

SLZ-KA35VAL

(1).TH

SLZ-KA35VA

(1).TH

Indoor service ref.

Function

Power supply

Single phase

230V, 50Hz

600/540/480

10

0.35
75

0.014

0.19

PK6V15-LD

4

37/31/28

650/530/480

3
10
10
10

Cooling

90

Heating

93

Single phase

230V, 50Hz

660/540/480

10

0.40
85

0.014

0.26

PK6V20-LL

4

38/33/29

690/570/510

3
10
10
10

Cooling

94

Heating

94

Air flow

(High/Medium/Low)
Power outlet
Running current ✽1
Power input Rated frequency
Dew prevention heater
Power factor ✽1
Fan motor current ✽1
Model

Winding
resistance (at 26:)

Width
Height

Depth
Weight
Air direction
Sound level(High/Medium/Low)
Fan speed(High/Medium/Low)
Fan speed regulator
Thermistor TH1(at25:)
Thermistor TH2(at25:)
Thermistor TH5(at25:)

K /h

A
A

W

(kW)

%

A

"

mm(in)
mm(in)
mm(in)

kg

dB(A)

rpm

k"
k"
k"

Electrical

data

Fan

motor

Special

remarks

Capacity

Dimensions

WHT-BLK : 407 BLK-BLU : 86
BLU-YLW : 30 BRN-RED : 165

UNIT : 570(22-7/16) PANEL : 650(25-9/16)
UNIT : 208(8-3/16) PANEL : 20(13/16)
UNIT : 570(22-7/16) PANEL : 650(25-9/16)
UNIT : 16.5 PANEL : 3

WHT-BLK : 393 BLK-BLU : 164
BLU-YLW : 47 BRN-RED : 319

SLZ-KA50VAL(1).TH

SLZ-KA50VA

(1).TH

Single phase

230V, 50Hz

660/540/480

20

0.65
85

0.014

0.27

PK6V20-LM

4

39/34/30

710/590/530

3
10
10
10

Cooling

97

Heating

97

WHT-BLK : 325 BLK-BLU : 143
BLU-YLW : 47 BRN-RED : 309

1.5+ 440V
250V 6.3A

MSBPC20 12V 250"

TO OUTDOOR UNIT : 3P TO WIRED REMOTE CONTROLLER : 2P (SLZ-KA25/35/50VA)

141:i3:

240V AC 15W

INDOOR UNIT

Item

Service ref.

Indoor fan capacitor
Fuse
Vane motor
Terminal block
Indoor fan motor thermal fuse
Cord Heater

SLZ-KA25VAL

(1).TH SLZ-KA35VAL(1).TH SLZ-KA50VAL(1).TH

(C1)

(FUSE)

(MV)

(TB)

(H2)

SLZ-KA25VA

(1).TH SLZ-KA35VA(1).TH SLZ-KA50VA(1).TH

SPECIFICATIONS

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:

Specifications and rating conditions of main electric parts

Refrigerant piping length (one way): 5m
✽1 Measured under rated operating frequency

Outdoor D.B. 7: W.B. 6:

6

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

SLZ-KA35VAL.TH
SLZ-KA35VA.TH
SLZ-KA35VAL

1.TH

SLZ-KA35VA

1.TH

High

Medium

38

SPL(dB)33LINE

<50Hz>

NOTCH

Low

29

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

SLZ-KA25VAL.TH
SLZ-KA25VA.TH
SLZ-KA25VAL

1.TH

SLZ-KA25VA

1.TH

High

Medium

37

SPL(dB)31LINE

<50Hz>

NOTCH

Low

28

NOISE CRITERION CURVES

UNIT

1.5m

MICROPHONE

CEILING

90

80

70

60

50

40

30

20

10

63 125 250 500 1000 2000 4000 8000

APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

SLZ-KA50VAL.TH
SLZ-KA50VA.TH
SLZ-KA50VAL

1.TH

SLZ-KA50VA

1.TH

High

Medium

39

SPL(dB)34LINE

<50Hz>

NOTCH

Low

30

NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound

may be bigger than the indicated level in actual use due to surrounding echoes. The sound level can be high­er by about 2 dB than the indicated level during cooling and heating operation.

7

4

SLZ-KA50VA(L)

SLZ-KA35VA(L)

SLZ-KA25VA(L)

Brand label

(Case of Wired remote controller)

Terminal block

Terminal block

87

Suspension bolt

M10 or 3/8

(procure locally)

1/4 inch

flared connection

{ 6.35mm

1/4 inch

flared connection

{ 6.35mm

{ 9.52mm

flared connection

3/8 inch

1/2 inch

flared connection

Refrigerent pipe (liquid)

Refrigerent pipe (gas)

Models

{ 6.35mm

flared connection

1/4 inch

Refrigerent pipe

(liquid)

Refrigerent pipe

(gas)

{ 12.7mm

{ 9.52mm

flared connection

3/8 inch

15~37 15~37

576~620

570

530

Grille

Fresh air

intake

Drain pipe

VP-25 connection

(O.D. { 32)

Vane motor

Drain hole

V/M

Air intake grille

55 35

35 55

Auto vane

Grille

Air intake hole

Air intake hole

Air outlet hole

Air outlet hole

301

301

Emergency operation switch(cooling)

Emergency operation switch(heating)

Operation lamp

DEFROST/STAND BY lamp

(WIRELESS PANEL)

Receiver

Detail drawing of fresh air intake

Ceiling surface

Cut out hole

{ 73.4

Burring hole

3- { 2.8 hole

{ 100

118

25

120°

120°

377

377

650

650

Suspension bolt

lower edge

230

18248

Wiring entry

Ceiling surface

235
208

27

+5

0

193

20

93

38~58

66121

17 202

56
57

31

Ceiling hole

Suspension bolt pitch

15~37 15~37576~620

420

570
335

199

352

335

Suspension bolt

pitch

Ceiling hole

V/M

V/M

V/M

OUTLINES AND DIMENSIONS

SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH
SLZ-KA25VAL1.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL1.TH
SLZ-KA25VA1.TH
SLZ-KA35VA1.TH
SLZ-KA50VA1.TH

Unit : mm

8

WIRELESS REMOTE CONTROLLER

Installation area

• Area in which the remote controller is not exposed to direct sunshine

• Area in which there is no heating source nearby

• Area in which the remote controller is not exposed to cold (or hot) winds

• Area in which the remote controller can be operated easily

• Area in which the remote controller is beyond the reach of children

Installation method

1 Attach the remote controller holder to the desired location using 2 tapping screws.
2 Insert the lower end of the controller into the holder.

A Wireless remote controller (Accessory)
B Wall
C Remote controller holder (Accessory)
D Fixing screw (Accessory)

• The signal can travel up to approximately 7 meters (in a straight line) within 45
degrees to both right and left of the center line of the receiver.
In addition, the signal may not be received if there is interference of light of fluorescent
lights or strong sunlight.

A

C

B

D

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

h

57 17.5

140

Unit : mm

9

WIRED REMOTE CONTROLLER

130

120

19

43.5

Unit : mm

10

5

SWE

GRILLE

OFF

ON

SW3

OFF

54321

ON

SW2

OFF

54321

ON

WHT

RED

RED

CNDK

(POWER
BOARD)

ZNR

X1

RED

ORN

YLW

YLW

BLU

BLU

BLU

BLU

LED3

CN2L

CN32 CN51 CN41

(REMOCON)

BLU

TO OUTDOOR UNIT

S3

ORN

MF

MV

MV

MV

MV

5

5

5

5

H2

5

21

P.B

3

TB4

S1
S2

TB15

1
2

TO MA-REMOTE
CONTROLLER
DC8.7-13V

}

REMOTE
CONTROLLER

W.R

9

5

CN6V

(VANE)

GRN

BLU

WHT

ORN

RED

YLW

YLW

X5

X5 X4

X4X7X6

X6 X7

97531

C1

BLK

WHT

BLU

YLW

BRN

RED

I.B

CNB

BZ

LED2

LED1

SW1

SW2

RU

W.B

9

CN22

1

(2 PHASE)

CN29

BLK

WHT

RED

(INTAKE)

(LIQUID)

CN31

3

CN20

CN21

112

212

2

12

DS

TH5

TH1

TH2

X1

YLW

BLU

(D·U·M)

CNP

RED

(D·HEATER)

CNC

313131

CND

(POWER)

ORN

FUSE

(CONTROL)

CN3C

BLU

3131

LED1

12

12

TRANS

DC13.1V
CN2S(WHT)

AC220-240V
CNSK(RED)

WHT

BLK

2

1

(POWER
BOARD)

CN2D

WHT

LED2

* Case of wireress model

* Case of wired model

See fig:w1

MODELS

KA25

KA35

KA50

<fig:w1>

ON

OFF

12345

ON

OFF

12345

ON

OFF

12345

SW2

YLW

YLW

RED

ORN

YLW

WHT

BLU

17451089236

DP

GRY

VLT

BLU

YLW

ORN

RED

BRN

SKYBLU

PINK

WHT

(WIRELESS)

CN90

987654321

654321

(FAN)

FAN

WHT

BRN
RED
ORN
YLW
BLU

VLT

GRY

PINK

SKY BLU

123456789

(DRAIN)

WHT

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 have polarities, make sure to match terminal numbers(S1,S2,S3) for correct wiring.

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

w For details on how to operate self-diagnosis, refer to the technical manuals etc.

SWITCH(COOLING ON/OFF)

LED(RUN INDICATOR)

SWITCH(HEATING ON/OFF)

LED(HOT ADJUST)

BUZZER

RECEIVING UNIT

WIRELESS REMOTE CONTROLLER BOARD

SW2

SW1

LED2

RU

LED1

BZ

W.B

H2

DP
DS

MV

MF FAN MOTOR

VANE MOTOR

DRAIN PUMP
DRAIN SENSOR
DEW PREVENTION HEATER

C1 CAPACITOR(FAN MOTOR)

FUSE(T6.3AL250V)

X7

X6

X5

X4

X1

ZNR

RELAY(FAN MOTOR Me)

RELAY(FAN MOTOR Hi)

RELAY(FAN MOTOR LL)
RELAY(FAN MOTOR Lo)

DRAIN PUMP/DEW PREVENTION HEATER

VARISTOR

SYMBOL NAME

SWITCH(CAPACITY CODE)

SW3

SW2

SWE SWITCH(EMERGENCY OPERATION)

SWITCH(MODE SELECTION)

TRANSMISSION(INDOOR-OUTDOOR)

LED1
LED2
LED3

POWER SUPPLY(I.B)
POWER SUPPLY(I.B)

CN51

CENTRALLY CONTROL

FUSE

P.B

CONNECTOR(HA TERMINAL-A)

CONNECTOR(REMOTE SWITCH)

CONNECTOR(LOSSNAY)

CN41

CN32

CN2L

INDOOR CONTROLLER BOARD

INDOOR POWER BOARD

I.B

NAMESYMBOL

TB4

TB15

TH1

TH2

TH5

TERMINAL BLOCK(INDOOR/OUTDOOR CONNECTING LINE)
TERMINAL BLOCK(REMOTE CONTROLLER
TRANSMISSION LINE)
ROOM TEMP.THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
PIPE TEMP.THERMISTOR/LIQUID
(0°C/15kΩ, 25°C/5.4kΩ DETECT)
COND./EVA.TEMP.THERMISTOR
(0°C/15kΩ, 25°C/5.4kΩ DETECT)

[LEGEND]

WIRING DIAGRAM

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

11

6

Pipe temperature
thermistor/liquid
(TH2)

Distributor
with strainer
#50

Condenser/evaporator
temperature thermistor
(TH5)

Room temperature
thermistor (TH1)

Refrigerant flow in cooling
Refrigerant flow in heating

Strainer
#50

Strainer
#50

Heat exchanger

Refrigerant GAS pipe connection
(Flare)

Refrigerant LIQUID pipe connection
(Flare)

REFRIGERANT SYSTEM DIAGRAM

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

12

7

Lead wire

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

ERROR CODE

ERROR CODE

ERROR CODE

1 Turn on the power.
2 Press the [CHECK] button twice.
3 Set address with [TEMP] button if system control is used.
4 Press the [ON/OFF] button to stop the self-check.

A CHECK button
B Address
C TEMP. button
D IC : Indoor unit

OC: Outdoor unit
E Check code

F Unit No.
G Timer ON/OFF button

A

F

C

BBEED

G

<To delete check code>

1 Display the error code on the self-check result display screen.
2 The address for self-check will blink when the

G ON/OFF

button is pressed twice within 3 seconds.

– – – – : No trouble generated in the past.
F F F F : No corresponding unit.

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

h

24

23

56

24

[Procedure]

1 Turn ON the power.
2 While pressing both the MODE SELECT button and

TOO COOL button on the remote controller at the same
time, press the RESET button.

3 Firstly, release the RESET button.
4 And release the other 2 buttons since all LCD in

operation display section of the remote controller is
displayed after 3 seconds.
5 Transmit the signal of remote controller, pressing ON/ OFF
button on the remote controller.
(The above procedure allows OPERATION INDICATOR lamp

to indicate the failure-mode.)

6 Transmit the signal of remote controller, pressing ON/ OFF

button to stop the self-check.

OPERATION INDICATER

TROUBLESHOOTING

7-1. CAUTIONS ON TROUBLESHOOTING

(1) Before troubleshooting, check the followings:

1Check the power supply voltage.
2Check that the indoor/outdoor connecting wire is correct.

(2) Take care of the followings during servicing.

1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn

off the breaker.

2 When removing the indoor controller board, hold the edge of the board with care NOTto apply stress on the

components.

3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

7-2. SELF-CHECK

7-2-1. Wired remote controller

7-2-2. Wireless remote controller

13

[Output pattern A] Errors detected by indoor unit

[Output pattern B]

E9

*1If the beeper does not sound again after the initial

2 beeps to confirm the self-check start signal was received and

the OPERATION INDICATOR lamp does not come on,

there are no error records.

*2If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial 2 beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

OPERATION
INDICATOR
lamp blink
pattern

Beep Beep Beep Beep Beep Beep Beep

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

· · · Repeated

Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “U2”)

Number of blinks/beeps in pattern indicates
the check code in the following table

n

th

1st2nd3

rd

1st2

nd

Self-check
starts
(Start signal
received)

Beeper sounds

[Output pattern B]

OPERATION
INDICATOR
lamp blink
pattern

Beep

Beep Beep Beep Beep Beep Beep

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

On

0.5 sec.

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

· · · Repeated

Number of blinks/beeps in pattern indicates the check
code in the following table (i.e., n=5 for “P5”)

Number of blinks/beeps in pattern indicates
the check code in the following table

n

th

1st2nd3

rd

1st2

nd

Self-check
starts
(Start signal
received)

Beeper sounds

• Refer to the following tables for details on the check codes.
[Output pattern A]

Beeper sounds/OPERATION

INDICATOR lamp blinks 1 Check code

Symptom Remark

(Number of times)

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp blinks 1 Check code

(Number of times)

Wireless remote controller

Wired remote controller

1P1

Intake sensor error

P9 Pipe (TH5) sensor error

2

P2 Pipe (TH2) sensor error

3 E6,E7

Indoor/outdoor unit communication error

4 P4 Drain sensor error
5 P5 Drain pump error
6 P6 Freezing/Overheating protection operation
7 EE Communication error between indoor and outdoor units
8 P8 Pipe temperature error
9 E4, E5 Remote controller signal receiving error

10

–

11

–

–
–

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Symptom Remark

1

Indoor/outdoor unit communication error

2

(Transmitting error) (Outdoor unit)

3

Open/short of outdoor unit thermistors

4

Compressor overcurrent interruption (When compressor locked)

5

Abnormal high discharging temperature/49C worked/
insufficient refrigerant

6

Abnormal high pressure (63H worked)/Overheating
protection operation

7

Abnormal temperature of heatsink

8

Outdoor unit fan protection stop

9

Compressor overcurrent interruption/Abnormal of power module

10

Abnormality of superheat due to low discharge temperature

11

Abnormality such as overvoltage or voltage shortage and
abnormal synchronous signal to main circuit/Current sensor error

12
13

U2

U5

UP
U3,U4
UF

U1,Ud

U8
U6
U7

U9,UH

Others

–
–

–
–

14

Other errors (Refer to the technical manual for the outdoor unit.)

For details, check
the LED display
of the outdoor
controller board.
As for outdoor
unit, refer to
service manual
OC322 or
OC323.

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

– E1, E2 Remote controller control board error

Remote controller transmission error

Compressor overcurrent interruption

14

continued to the next page.

•

If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.

Symptom

Cause

Wired remote controller

On the wireless remote controller with condition above, following phenomena take place.

• No signals from the remote controller can be received.

• Operation lamp is blinking.

• The buzzer makes a short ping sound.

PLEASE WAIT

PLEASE WAIT → Error code

No messages appear even
when operation switch is turned
ON (operation lamp does not
light up).

For about 2 minutes after power-on

Subsequent to about 2 minutes
after power-on

•

For about 2 minutes after power-on,operation

of the
remote controller is not possible due to system start-up.
(Correct operation)

•Connector for the outdoor unit’s protection device is not
connected.

•Reverse or open phase wiring for the outdoor unit’s
power terminal block

•Incorrect wiring between indoor and outdoor units.
(incorrect polarity of S1, S2, S3)

•Remote controller wire short

Note:
Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation)

For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table.

LED1 (power for microcomputer)

Indicates whether control power is supplied. Make sure that this LED is
always lit.

LED2 (power for remote controller)

Indicates whether power is supplied to the remote controller.
This LED lights only in the case of the indoor unit which is connected to the
outdoor unit refrigerant address “0”.

LED3 (communication between indoor and
outdoor units)

Indicates state of communication between the indoor and outdoor units.
Make sure that this LED is always blinking.

• On wireless remote controller

2The continuous buzzer sounds from receiving section of indoor unit.
3Blink of operation lamp

• On wired remote controller

1Check code displayed on the LCD.

15

7-3. SELF-DIAGNOSIS ACTION TABLE

Error Code

P1

P2

Abnormal point and detection method

Room temperature thermistor (TH1)

1 The unit is in 3-minute resume

prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3 min­utes. (The unit returns to normal opera­tion, if it has been reset normally.)

2 Constantly detected during cooling,

drying and heating operation
Short: 90: or more
Open: -40: or less

Pipe temperature thermistor/Liquid
(TH2)

1 The unit is in 3-minute resume

prevention mode if short/open of
thermistor is detected. Abnormal if the
unit does not reset normally after 3 min­utes. (The unit returns to normal opera­tion, if it has been reset normally.)

2 Constantly detected during cooling,

drying, and heating (except defrosting)
operation.
Short: 90: or more
Open: -40: or less

Note: Refer to the manual of outdoor unit for the details of display

such as F, U, and other E.

Cause

1 Defective thermistor

characteristics

2 Contact failure of connector

(CN20) on the indoor controller
board (Insert failure)

3 Breaking of wire or contact

failure of thermistor wiring

4 Defective indoor controller

board

1 Defective thermistor

characteristics

2 Contact failure of connector

(CN21) on the indoor controller
board (Insert failure)

3 Breaking of wire or contact

failure of thermistor wiring

4 Defective refrigerant circuit is

causing thermistor temperature
of 90: or more or -40: or
less.

5 Defective indoor controller board

Countermeasure

1–3 Check resistance value of thermistor.

0: ····15.0k"
10: ······9.6k"
20: ······6.3k"
30: ······4.3k"
40: ······3.0k"

If you put force on (draw or bend) the lead wire
with measuring resistance value of thermistor,
breaking of wire or contact failure can be
detected.
2 Check contact failure of connector (CN20) on

the indoor controller board. Refer to 7-5.
Turn the power back on and check restart
after inserting connector again.

4 Check room temperature display on remote

controller.
Replace indoor controller board if there is
abnormal difference with actual room
temperature.

Turn the power off, and on again to operate
after checking.

1–3 Check resistance value of thermistor.
For characteristics, refer to (P1) above.
2 Check contact failure of connector (CN21) on

the indoor controller board. Refer to 7-5. Turn
the power on and check restart after inserting
connector again.

4 Check pipe <liquid> temperature with remote

controller in test run mode. If pipe <liquid>
temperature is extremely low (in cooling
mode) or high (in heating mode), refrigerant
circuit may have defect.

5 Check pipe <liquid> temperature with remote

controller in test run mode. If there is extreme
difference with actual pipe <liquid> temperature,
replace indoor controller board.

P4

P5

Drain sensor (DS)

1 Suspensive abnormality, if short/open of

thermistor is detected for 30 seconds
continuously.
Turn off compressor and indoor fan.

2 Short/open is detected for 30 seconds

continuously during suspensive
abnormality.
(The unit returns to normal operation,

if it has been reset normally.)

3 Detect the following condition.

• During cooling and drying operation

• In case that pipe <liquid> temperature

- room temperature <-10deg

(Except defrosting)

• When pipe <liquid> temperature or
room temperature is short/open
temperature.

• During drain pump operation

Malfunction of drain pump (DP)

1 Suspensive abnormality, if thermistor

of drain sensor heats itself and
temperature rises slightly. Turn off
compressor and indoor fan.

2 Drain pomp is abnormal if the condition

above is detected during suspensive
abnormality.

3 Constantly detected during drain pump

operation

1 Defective thermistor

characteristics

2 Contact failure of connector

(CN31) on the indoor controller
board (Insert failure)

3 Breaking of wire or contact

failure of drain sensor wiring

4 Defective indoor controller board

1 Malfunction of drain pump
2 Defective drain

Clogged drain pump
Clogged drain pipe

3 Attached drop of water at the

drain sensor

• Drops of drain trickles from
lead wire

• Clogged filter is causing
wave of drain.

4 Defective indoor controller board

Turn the power off, and on again to operate
after checking.

1–3 Check resistance value of thermistor.

0: ······6.0k"
10: ······3.9k"
20: ······2.6k"
30: ······1.8k"
40: ······1.3k"

2 Check contact failure of connector (CN31) on

the indoor controller board. Refer to 7-5. Turn
the power back on and check restart after
inserting connector again.

4 Replace indoor controller board if drain

pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited,
and abnormality reappears.

Turn the power off, and on again to operate
after checking.

1 Check if drain pump works.
2 Check drain function.
3 Check the setting of lead wire of drain sensor

and check clogs of the filter.

4 Replace indoor controller board if drain

pump operates with the line of drain sensor
connector CN31-1 and 2 is short-circuited
and abnormality reappears.
Refer to 7-5.

Turn the power off, and on again to operate
after checking.

16

Error Code

P6

Abnormal point and detection method

Freezing/overheating protection is
working

1 Freezing protection (Cooling mode)

The unit is in 6-minute resume prevention
mode if pipe <liquid or condenser/evap­orator> temperature stays under

-15: for 3 minutes after the compres­sor started. Abnormal if it stays under ­15: for 3 minutes again within 16 min-
utes after 6-minute resume prevention
mode.

2 Overheating protection (Heating mode)

The units is in 6-minute resume
prevention mode if pipe <condenser /
evaporator> temperature is detected as
over 70: after the compressor started.
Abnormal if the temperature of over
70: is detected again within 10 minutes
after 6-minute resume prevention mode.

Cause

(Cooling or drying mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Low-load (low temperature)

operation out of the tolerance
range

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is
defective.

5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit

(clogging)

(Heating mode)

1 Clogged filter (reduced airflow)
2 Short cycle of air path
3 Overload (high temperature)

operation out of the tolerance
range

4 Defective indoor fan motor

• Fan motor is defective.

• Indoor controller board is
defective.

5 Defective outdoor fan control
6 Overcharge of refrigerant
7 Defective refrigerant circuit

(clogging)

8 Bypass circuit of outdoor unit

is defective.

Countermeasure

(Cooling or drying mode)

1 Check clogging of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's winding.

Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be

normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 7-5.

5 Check outdoor fan motor.
67 Check operating condition of refrigerant

circuit.

(Heating mode)

1 Check clogs of the filter.
2 Remove shields.

4 Measure the resistance of fan motor's

winding.
Measure the output voltage of fan's connector
(FAN) on the indoor controller board.
WThe indoor controller board should be

normal when voltage of AC 220~240V is
detected while fan motor is connected.
Refer to 7-5.

5 Check outdoor fan motor.
6~8Check operating condition of refrigerant

circuit.

P8

Pipe temperature

<Cooling mode>
Detected as abnormal when the pipe tem­perature is not in the cooling range 3 min­utes after compressor start and 6 minutes
after the liquid or condenser/evaporator pipe
is out of cooling range.
Note 1) It takes at least 9 min. to detect.
Note 2) Abnormality P8 is not detected in

drying mode.
Cooling range : -3 deg ] (TH-TH1)
TH: Lower temperature between liquid pipe

temperature (TH2) and
condenser/evaporator temperature
(TH5)

TH1: Intake temperature
<Heating mode>

When 10 seconds have passed after the
compressor starts operation and the hot
adjustment mode has finished, the unit is
detected as abnormal when
condenser/evaporator pipe temperature is
not in heating range within 20 minutes.

Note 3) It takes at least 27 minutes to

detect abnormality.
Note 4) It excludes the period of defrosting

(Detection restarts when defrosting

mode is over)
Heating range : 3 deg [ (TH5-TH1)

1 Slight temperature difference

between indoor room
temperature and pipe <liquid
or condenser / evaporator>
temperature thermistor

• Shortage of refrigerant

• Disconnected holder of pipe
<liquid or condenser /

evaporator> thermistor

• Defective refrigerant circuit

2 Converse connection of

extension pipe (on plural units
connection)

3 Converse wiring of indoor/

outdoor unit connecting wire
(on plural units connection)

4 Defective detection of indoor

room temperature and pipe
<condenser / evaporator>
temperature thermistor

5 Stop valve is not opened

completely.

1~4Check pipe <liquid or condenser /

evaporator> temperature with room
temperature display on remote
controller and outdoor controller circuit
board.
Pipe <liquid or condenser / evaporator>
temperature display is indicated by
setting SW2 of outdoor controller circuit
board as follows.

Conduct temperature check with outdoor
controller circuit board after connecting

(

‘A-Control Service Tool(PAC-SK52ST)’.

23Check converse connection of extension

pipe or converse wiring of indoor/outdoor
unit connecting wire.

)

17

Error Code

P9

E0

or

E4

E3

or

E5

Abnormal point and detection method

Pipe temperature thermistor /
Condenser / Evaporator (TH5)

1 The unit is in 3-minute resume protec-

tion mode if short/open of thermistor is
detected. Abnormal if the unit does not
get back to normal within 3 minutes.
(The unit returns to normal operation, if
it has been reset normally.)

2 Constantly detected during cooling, dry-

ing, and heating operation (except
defrosting)
Short: 90: or more
Open: -40: or less

Remote controller transmission
error(E0)/signal receiving error(E4)

1 Abnormal if main or sub remote con-

troller cannot receive any transmission
normally from indoor unit of refrigerant
address “0” for 3 minutes.
(Error code : E0)

2 Abnormal if sub-remote controller could

not receive for any signal for 2 minutes.
(Error code: E0)

1 Abnormal if indoor controller board can-

not receive normally any data from
remote controller board or from other
indoor controller board for 3 minutes.
(Error code: E4)

2 Indoor controller board cannot receive

any signal from remote controller for 2
minutes. (Error code: E4)

Remote controller transmission
error(E3)/signal receiving error(E5)

1 Abnormal if remote controller could not

find blank of transmission path for 6 sec­onds and could not transmit.
(Error code: E3)

2 Remote controller receives transmitted

data at the same time, compares the
data, and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E3)

1 Abnormal if indoor controller board could

not find blank of transmission path.

(Error code: E5)

2 Indoor controller board receives trans-

mitted data at the same time, compares
the data,and when detecting it, judges
different data to be abnormal 30
continuous times. (Error code: E5)

Cause

1 Defective thermistor

characteristics

2 Contact failure of connector

(CN29) on the indoor controller
board (Insert failure)

3 Breaking of wire or contact

failure of thermistor wiring

4 Temperature of thermistor is

90: or more or -40: or less
caused by defective refrigerant
circuit.

5 Defective indoor controller

board

1 Contact failure at transmission

wire of remote controller

2 All remote controllers are set

as “sub” remote controller. In
this case, E0 is displayed on
remote controller, and E4 is
displayed at LED (LED1, LED2)
on the outdoor controller circuit
board.

3 Miswiring of remote controller
4 Defective transmitting/receiving

circuit of remote controller

5 Defective transmitting/receiving

circuit of indoor controller board
of refrigerant address “0”

6 Noise has entered into the

transmission wire of remote
controller.

1 2 remote controllers are set as

“main.”

(In case of 2 remote con-

trollers)

2 Remote controller is connected

with 2 indoor units or more.

3 Repetition of refrigerant

address

4 Defective transmitting/receiving

circuit of remote controller

5 Defective transmitting/receiving

circuit of indoor controller
board

6 Noise has entered into trans-

mission wire of remote con­troller.

Countermeasure

1–3 Check resistance value of thermistor.

For characteristics, refer to (P1) above.

2 Check contact failure of connector (CN29)

on the indoor controller board.
Refer to 7-5.
Turn the power on and check restart after
inserting connector again.

4 Operate in test run mode and check pipe

<condenser / evaporator> temperature with
outdoor controller circuit board. If pipe
<condenser / evaporator> temperature is
extremely low (in cooling mode) or high (in
heating mode), refrigerant circuit may have
defect.

5 Operate in test run mode and check pipe

<condenser / evaporator> temperature with
outdoor control circuit board. If there is
extreme difference with actual pipe
<condenser / evaporator> temperature
replace indoor controller board.
There is no abnormality if none of above
comes within the unit.
Turn the power off and on again to operate.

In case of checking pipe temperature
with outdoor controller circuit board,
be sure to connect A-control service

(

tool (PAC-SK52ST).

1 Check disconnection or looseness of indoor

unit or transmission wire of remote controller.

2 Set one of the remote controllers “main”,

if there is no problem with the action above.

3 Check wiring of remote controller.

• Total wiring length: max. 500m
(Do not use cablex 3 or more)

• The number of connecting indoor units:
max. 16 units

• The number of connecting remote con­troller: max. 2 units

When the above-mentioned problem of 1~3
are not seen.
4 Diagnose remote controllers.

a) When “RC OK” is displayed,

remote controllers have no problem.
Turn the power off, and on again to
check. If abnormality generates again,
replace indoor controller board.

b) When “RC NG” is displayed,

replace remote controller.
c) When “RC E3” is displayed,
d) When “ERC 00-06” is displayed,
[ c),d)→Noise may be causing abnormality. ]

∗ If the unit is not normal after replacing

indoor controller board in group control,
indoor controller board of address “0”
may be abnormal.

1 Set a remote controller to main, and the

other to sub.

2 Remote controller is connected with only one

indoor unit.

3 The address changes to a separate setting.
4~6 Diagnose remote controller.

a) When “RC OK”is displayed, remote con-

trollers have no problem.

Turn the power off, and on again to check.
When becoming abnormal again, replace

indoor controller board.

b)When “RC NG” is displayed, replace

remote controller.

c)When “RC E3”or “ERC 00-66” is dis-

played, noise may be causing abnormali-

ty.

)

18

Error Code

E6

E7

Fb

E1

or

E2

Abnormal point and detection method

Indoor/outdoor unit communication
error (Signal receiving error)

1 Abnormal if indoor controller board

cannot receive any signal normally for 6
minutes after turning the power on.

2 Abnormal if indoor controller board

cannot receive any signal normally for 3
minutes.

3 Consider the unit abnormal under the

following condition: When 2 or more
indoor units are connected to one
outdoor unit, indoor controller board
cannot receive a signal for 3 minutes
from outdoor controller circuit board, a
signal which allows outdoor controller
circuit board to transmit signals.

Indoor/outdoor unit communication
error (Transmitting error)

Abnormal if “1” receiving is detected 30
times continuously though indoor controller
board has transmitted “0”.

Indoor controller board

Abnormal if data cannot be normally read
from the nonvolatile memory of the indoor
controller board.

Remote controller control board

1 Abnormal if data cannot be normally

read from the nonvolatile memory of the
remote controller control board.

(Error code: E1)

2 Abnormal if the clock function of remote

controller cannot be normally operated.

(Error code: E2)

Cause

1 Contact failure, short circuit or,

miswiring (converse wiring) of
indoor/outdoor unit connecting
wire

2 Defective transmitting/receiving

circuit of indoor controller board

3 Defective transmitting/receiving

circuit of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

1 Defective transmitting receiving

circuit of indoor controller board

2 Noise has entered into power

supply.

3 Noise has entered into outdoor

control wire.

1 Defective indoor controller

board

1 Defective remote controller 1 Replace remote controller.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor unit or
outdoor unit.
Check all the units in case of twin indoor

unit system.

2-4 Turn the power off, and on again to

check. If abnormality generates again,
replace indoor controller board or outdoor
controller circuit board.

∗ Other indoor controller board may have

defect in case of twin indoor unit system.

1-3 Turn the power off, and on again to

check. If abnormality generates again,
replace indoor controller board.

1 Replace indoor controller board.

Countermeasure

PA
(2502)
(2500)

Forced compressor stop
(due to water leakage abnormality)

1 When the intake temperature subtracted

with liquid pipe temperature is less than

-10:, drain sensor detects whether
it is soaked in the water or not at the interval
of 90 seconds. (Drain pump will start operating
when the drain sensor detects to be
soaked in the water.)

2 The unit has a water leakage abnormali-

ty when the following conditions, a) and
b), are satisfied while the above-men­tioned detection is performed.

a) The drain sensor detects to be

soaked in the water 10 times in a row.

b) The intake temperature subtracted with

liquid pipe temperature is detected to be

less than -10: for a total of 30 minutes.

(When the drain sensor detects to

be NOT soaked in the water, the detection
record of a) and b) will be cleared.)

3 The drain sensor detection is performed

in operations other than cooling. (When
the unit stops operating, during heating
or fan operation, when the unit stops
because of some abnormality)

*Once the water leakage abnormality is

detected, abnormality state will not be
released until the main power is reset.

1 Drain pump trouble
2 Drain defective

· Drain pump clogging

· Drain pipe clogging

3 Open circuit of drain sensor

side heater

4 Contact failure of drain sensor

connector

5 Dew condensation on drain

sensor

· Drain water trickles along
lead wire.

· Drain water waving due to filter
clogging

6 Extension piping connection

difference at twin, triple,
quadruple system

7 Miswiring of indoor/ outdoor

connecting at twin, triple,
quadruple system

8 Room temperature thermistor /

liquid pipe temperature thermis­tor detection is defective.

1Check the drain pump.
Performance
2Please check whether water can be

drained.

3Check the resistance of the drain sensor

side heater.

4Check the connector contact failure.

5 Check the drain sensor leadwire mounted.

Check the filter clogging.

6Check the piping connection.

7Check the indoor/ outdoor connecting wires.

8Check the room temperature display of

remote controller.
Check the indoor liquid pipe temperature
display of outdoor controller board.

19

7-4. TROUBLESHOOTING BY INFERIOR PHENOMENA

Note: Refer to the manual of outdoor unit for the detail of remote

controller.

Phenomena

(1)LED2 on indoor controller board

is off.

• When LED1 on indoor controller board is also off.

1 Power supply of rated voltage is not supplied to out-

door unit.

2 Defective outdoor controller circuit board

3 Power supply of 220~240V is not supplied to indoor

unit.

4 Defective indoor power board

5 Defective indoor controller board

Cause

Countermeasure

1 Check the voltage of outdoor power

supply terminal block (L, N) or (L

• When AC 220~240V is not detected,
check the power wiring to outdoor unit
and the breaker.

• When AC 220~240V is detected,
check 2 (below).

2 Check the voltage between outdoor

terminal block S1 and S2.

• When AC 220~240V is not detected,
—check the fuse on outdoor controller
circuit board.
—check the wiring connection.

• When AC 220~240V is detected,
check 3 (below).

3 Check the voltage between indoor terminal

block S1 and S2.

• When AC 220~240V is not detected,
check indoor/outdoor unit connecting
wire for miswiring.

• When AC 220~240V is detected,
check 4 (below).

4 Check voltage output from CN2S on indoor

power board (DC13.1V). Refer to 7-5.

• When no voltage is output,
check the wiring connection.

• When output voltage is between
DC12.5V and DC13.7V,
check 5 (below).

5 Check the wiring connection between

indoor controller board and indoor power
board. Check the fuse on indoor controller
board. If no problems are found, indoor
controller board is defective.

3, N).

(2)LED2 on indoor controller board

is blinking.

• When LED1 on indoor controller board is lit.

1 Mis-setting of refrigerant address for outdoor unit

(There is no unit corresponding to refrigerant
address “0”.)

• When LED1 on indoor controller board is also blinking.
Connection failure of indoor/outdoor unit connecting
wire

• When LED1 is lit

1 Miswiring of remote controller wires

Under twin indoor unit system, 2 or more indoor

2 Refrigerant address for outdoor unit is wrong or not

set.
Under grouping control system, there are some units
whose refrigerant address is 0.

3 Short-cut of remote controller wires
4 Defective remote controller

units

1 Check the setting of refrigerant address

for outdoor unit.

Set the refrigerant address to “0”.
(For grouping control system under
which 2 or more outdoor units are
connected, set one of the units to “0”.)
Set refrigerant address using SW1 (3-6)
on outdoor controller circuit board.

Check indoor/outdoor unit connecting wire
for connection failure.

1 Check the connection of remote cotroller

wires in case of twin triple indoor unit
system. When 2 or more indoor units are
wired in one refrigerant system, connect
remote controller wires to one of those
units.

2 Check the setting of refrigerant address

in case of grouping control system. If
there are some units whose refrigerant
addresses are 0 in one group, set one of
the units to 0 using SW1 (3-6) on out­door controller circuit board.

34 Remove remote controller wires and

check LED2 on indoor controller board.

• When LED2 is blinking, check the
short-cut of remote controller wires.

• When LED2 is lit, connect remote
controller wires again and:
if LED2 is blinking, remote controller
is defective; if LED2 is lit, connection
failure of remote controller terminal
block etc. has returned to normal.

20

7-5. TEST POINT DIAGRAM

7-5-1. Indoor power board

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

CN2S
Connect to the indoor controller board (CN2D)
between 1 to 3 12.6-13.7V DC (Pin1 (+))

CNSK
Connect to the indoor controller board
(CNDK)
between 1 to 3 220-240V AC

21

7-5-2. Indoor controller board

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

CN3C
Transmission
(Indoor/outdoor)
(0~24V DC)

CND
Power
supply input
(220~240V AC)

FUSE
(6.3A 250V)

CNDK
Connect to the indoor
power board (CNSK)
(220~240V AC)

CNC
Dew prevention
heater (H2)
(220~240V AC)

CNP
Drain-pump output
(DP)
(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
Room temperature
thermistor (TH1)
CN21
Pipe temperature
thermistor/Liquid

(TH2)
CN29
Condenser/evaporator
temperature thermistor
(TH5)

CN31
Drain sensor (DS)

CN90
Connect to the
wireless remote
controller board
(CNB)

CN41
Connector
(HA terminal-A)

CN6V
Vane motor output
(MV)

CN51
Centrally control

FAN
Fan motor output

SW3
Mode selection

SWE
Emergency operation

22

CN2L
Connector
(LOSSNAY)

Jumper connector
J11~J15
Unit setting

SW2
Capacity setting

7-6. TROUBLE CRITERION OF MAIN PARTS

Measure the resistance between the terminals with a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0:~60:)

(Refer to the next page for a detail.)

Abnormal

Open or short

Normal

0.6k"~6.0k"

BLK REDORNYLW

BLU

BRN

WHT

P

Room temperature
thermistor
(TH1)

Condenser/evaporator
temperature thermistor
(TH5)

Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)

Measure the resistance between the terminals with a tester.
(Coil wiring temperature 10°C ~ 30°C)

Pipe temperature
thermistor/liquid
(TH2)

Indoor fan motor
(MF)

Check method and criterion

Part name

Normal

KA25VA(L)

Normal

WHT-BLK

BLK-BLU

BLU-YLW

BRN-RED

386~428"

81~91"
28~32"

157~174"

KA35VA(L)

373~413"
155~172"

44~49"

302~335"

KA50VA(L)

308~341"
135~151"

44~49"

293~324"

4.3kΩ~9.6k"

Abnormal

Abnormal

Opened or

short-circuited

Opened or short-circuited

Measure the resistance between the terminals with a tester.
(At the ambient temperature 20:~30:)

Measure the resistance between the terminals with a tester.
(At the ambient temperature 20:~30:)

Vane motor (MV)

Drain pump (DP)

Drain sensor (DS)

1
2

Yellow

Yellow

1
2
3

NormalConnector Abnormal

300" Open or short

Normal Abnormal

290" Open or short

Orange

Red

White

P : Thermal fuse 141 ± 3˚C

Red — Yellow
Red — Blue
Red — Orange
Red — White

Blue

Yellow

35

1

2

4

M

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

23

<Thermistor Characteristic graph>

-20 0 20406080

< Thermistor for drain sensor >

Temperature (:)

0

1

2

3

4

5

6

7

8

9

10

Resistance (k")

Thermistor for
lower temperature

•Room temperature thermistor (TH1)

•Pipe temperature thermistor/liquid (TH2)

•Condenser/evaporator temperature
thermistor (TH5)

Thermistor R0=15k' ±3%
Fixed number of B=3480 ± 2%

Rt=15exp { 3480( ) }

1

273+t

1

273

0: 15k'
10: 9.6k'
20: 6.3k'
25: 5.2k'
30: 4.3k'
40: 3.0k'

Thermistor for
drain sensor

< Thermistor for lower temperature >

50

40

30

20

Resistance (k")

10

0

-20 -10 0 10 20 30 40 50
Temperature (:)

Thermistor R0=6.0k' ±5%
Fixed number of B=3390 ± 2%

Rt=6exp { 3390( ) }

1

273+t

0: 6.0k'
10: 3.9k'
20: 2.6k'
25: 2.2k'
30: 1.8k'
40: 1.3k'
60: 0.6k'

1

273

24

8 4-WAY AIR FLOW SYSTEM

Detail drawing of fresh air intake

Ceiling surface

Refrigerant pipe

Drain pipe

Electrical Box

Cut out hole

[73.4

Burring hole

3-[2.8 hole

[100

118

25

120

°

120

°

Fresh air intake

Static pressure : P [Pa]

Air flow : Q [m

3

/min]

50

-50

-100

-150

-200

-250

-300

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5

Q

0

B

A

C

1

Curve in the
left graphs

Duct characteristics
at site

Q

A

EC

2

Q

Qa

AD

3

Multiple remote
controller adapter
PAC-SA88HA-E

Indoor controller board

Distance between indoor
controller board and relay
must be within 10m.

Be sure to secure insulation
material by tape, etc.

5

Green

Yellow
Orange

Connector (5P)

Indoor unit side

Multiple remote
controller adapter
PAC-SA88HA-E

Be sure to secure insulation
material by tape, etc.

Installation at site

CN51
on
indoor unit
board

Red

Brown

1

~

CN51

MB

CN51(WHT)

8-1. FRESH AIR INTAKE (LOCATION FOR INSTALLATION)

At the time of installation, use the duct holes (cut out) located at the positions shown in following diagram, as and when required.

8-2. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
SLZ-KA25VAL(1).TH SLZ-KA25VA(1).TH
SLZ-KA35VAL
SLZ-KA50VAL

Taking air into the unit

NOTE: Fresh air intake amount should be 20% or less of

whole air amount to prevent dew dripping.

(1).TH SLZ-KA35VA(1).TH
(1).TH SLZ-KA50VA(1).TH

How to read curves

Q…Designed amount of fresh air intake
A…Static pressure loss of fresh air

intake duct system with air flow
amount Q <Pa>

B…Forced static pressure at air condi-

tioner inlet with air flow amount Q

C…Static pressure of booster fan with

air flow amount Q <Pa>

D…Static pressure loss increase

amount of fresh air intake duct sys­tem for air flow amount Q <Pa>

E…Static pressure of indoor unit with air

flow amount Q <Pa>

Qa…Estimated amount of fresh air

intake without D <m3/min>

<m3/min>

<Pa>

8-3. OPERATION IN CONJUNCTION WITH DUCT FAN (BOOSTER FAN)

●Whenever the indoor unit operates, the
duct fan operates.
(1)Connect the optional multiple remote

controller adapter(PAC-SA88HA-E)
to the connector CN51 on the indoor
controller board.

(2)Drive the relay after connecting the

12V DC relay between the Yellow
and Orange connector wires.

Use a relay of 1W or smaller.

MB: Electromagnetic switch power

X: Auxiliary relay (12V DC LY-1F)

relay for duct fan.

25

8-4. FIXING HORIZONTAL VANE

Standard of

horizontal position
Dimension A (mm)

21 25 28 30

Level 30°

(Min.)

Downward 45° Downward 55°

Downward 70°

(Max.)

w Dimension between 21 mm and 30 mm can be arbitrarily set.

Caution

Do not set the dimension out of the range.

Erroneous setting could cause dew drips, smudge on ceiling or malfunction of unit.

<Set range>

.

Horizontal vane of each air outlet can be fixed according to the environment where it is installed.

Setting procedure

1) Turn off a main power supply (Turn off a breaker).

2) Remove the vane motor connector in the direction of the arrow shown below with pressing the unlocking button as in the
figure below.

Insulate the disconnected connector with the plastic tape.

Vane motor

Vane motor

Connector

Horizontal vane

3) Set the vertical vane of the air outlet by hand slowly within the range in the table below.

Measured standard

position of the grille

Horizontal vane

Unlocking button

26

9 DISASSEMBLY PROCEDURE

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

Be careful on removing heavy parts.

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

1. Removing the air intake grille

(1) Slide the knob of air intake grille to the direction of the

arrow 1 to open the air intake grille.

(2) Remove the string hook from the panel to prevent the grille

from dropping.

(3) Slide the hinge of the intake grille to the direction of the

arrow 2 and remove the air intake grille.

2. Removing the fan guard

(1) Open the air intake grille.
(2) Remove the 3 screws of fan guard.

3. Removing the panel

(1) Remove the air intake grille. (Refer to 1)
Corner panel (See figure 2)

(1) Remove the screw of the corner.
(2) Slide the corner panel to the direction of the arrow 3, and

remove the corner panel.

Panel (See photo 2)

(1) Disconnect the connector that connects with the unit.
(2) Remove the 2 screws from the panel and loose another 2

screws, which are fixed to the oval hole, have different
diameter.

(3) Rotate the panel a little to remove the screws.(Slide the

panel so that the screw comes to a larger diameter of the
oval hole, which has 2 different diameters.)

Figure 1

Air intake grille

Air intake grille knob

Photo 1

Fan guard

Figure 2

Corner
panel

Photo 2

Connectors

Screws

Grille

Screw

Corner
panel

Screws

Air intake grille

Panel

Screws

Panel

4. Removing the electrical parts

(1) Remove the 2 screws and the control box cover.

<Electrical parts in the control box>

• Indoor controller board (I.B)

• Terminal block (TB4)

• Indoor power board (P.B)

27

Photo 3

Indoor power board(P.B)

Indoor controller board
(I.B)

Terminal block
(TB4)

OPERATING PROCEDURE

PHOTOS&ILLUSTRATIONS

5. Removing the room temperature thermistor (TH1)

(1) Remove the panel. (Refer to 3)
(2) Pull out the room temperature thermistor from the drain

pan.

(3) Remove the 2 screws fixed to the control box cover, and

remove the control box cover.

(4) Remove the connector (CN20) from the indoor controller

board, and disconnect the room temperature thermistor.

6. Removing the drain pan

(1) Remove the panel. (Refer to 3)
(2) Remove the room temperature thermistor and the 2 lead

wires held with fastener; wireless controller board relay
connector (9P red) and panel relay connector (10P white).

(3) Remove the 4 screws fixed to the drain pan, and remove

the drain pan.

(4) Remove the fan guard. (Refer to 2)

7. Removing the pipe temperature thermistor/liquid (TH2)
and condenser/evaporator temperature thermistor (TH5)

(1) Remove the panel. (Refer to 3)
(2) Remove the drain pan. (Refer to 6)
(3) Disconnect the indoor coil thermistor from the holder.
(4) Remove the 3 screws fixed to the piping cover, and

remove the piping cover. (See photo 9)

(5) Remove the 2 screws fixed to the control box cover, and

remove the control box cover.

Photo 4

Screw

Room
temperature
thermistor
(TH1)

Screw

Photo 5

Control box

Fan guard

Control box

Connectors

Drain plug

Screw

Drain pan

Screw

Pipe temperature thermistor/liquid (TH2)

(6) Remove the connector (CN21) from the indoor controller

board, and disconnect the pipe temperature thermistor/liquid.

Condenser/evaporator temperature thermistor (TH5)

(6) Remove the connector (CN29) from the indoor controller

board, and disconnect the condenser/evaporator temperature
thermistor.

8. Removing the fan motor (MF)

(1) Remove the panel. (Refer to 3)
(2) Remove the drain pan. (Refer to 6)
(3) Remove the nut and the washer from the turbo fan, and

remove the turbo fan.

(4) Remove the 2 screws fixed to the control box cover, and

remove the control box cover.

(5) Disconnect the connectors of the (fan 1) and the (fan 2)

from the indoor controller board.

(6) Remove the 3 screws fixed to the piping cover, and

remove the piping cover. (See photo 9)

(7) Remove the 6 screws fixed to the flat plate, and remove

the flat plate.

(8) Disconnect the lead wires to the direction of the fan motor,

and remove the 3 nuts of the fan motor.

Pipe temperature
thermistor/liquid
(TH2)

Photo 6

Screws

Lead
wires

Screw

Flat plate

Condenser/evaporator
temperature thermistor
(TH5)

Screw

Nut

Nut

Fan motor
(MF)

Nut

Screws

28

OPERATING PROCEDURE PHOTOS&ILLUSTRATIONS

9. Removing the drain pump (DP) and drain sensor (DS)

(1) Remove the panel. (Refer to 3 )
(2) Remove the drain pan. (Refer to 6)
(3) Remove the 2 screws fixed to the control box cover, and

remove the control box cover.

(4) Remove the connectors of the (CNP) and the (CN31)

from the indoor controller board.

(5) Remove the 1 screw fixed to the cover, and remove the

cover.

(6) Disconnect the lead wires to the direction of the drain

pump.(See photo 7)
(7) Remove the 3 screws of the drain pump.
(8) Cut the drain hose band, pull out the drain hose from the

drain pump.
(9) Pull out the drain pump.
(10) Remove the drain sensor and the holder.

10. Removing the heat exchanger

(1) Remove the panel. (Refer to 3 )
(2) Remove the drain pan. (Refer to 6)
(3) Remove the nut and the washer from the turbo fan, and

remove the turbo fan.

(4) Remove the 2 screws fixed to the control box cover, and

remove the control box cover.

(5) Disconnect the connector of the (fan) from the indoor con-

troller board.

(6) Remove the 3 screws fixed to the piping cover, and

remove the piping cover. (See photo 9)

(7) Remove the pipe temperature thermistor/liquid and

condenser/evaporator temperature thermistor. (Refer to 7)
(8) Disconnect the lead wires to the direction of the fan motor.
(9) Remove the 1 coil support screw, the 2 inside coil screws

(See photo 10), and the 4 outside coil screws (See photo 9)

from the heat exchanger, and remove the heat exchanger.

Photo 7

Control
box

Photo 8

Drain
hose

Screw

Photo 9

Coil
screws

Screws of
piping cover

Piping cover

Screw

Drain sensor (DS) Drain pump (DP)

Fixing band

Cover

Lead wires

Lead wires

Screws

Control box

Coil
screws

Control box

29

Photo 10

Coil screws

Coil
support

Coil
support
Screw

Heat exchanger

PARTS LIST (Non RoHS compliant)10

No.

Parts No.

Specification

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom­mended

Q'ty

1

2
3
4
5
6
7
8
9

10

1

1
4
4
1
1
4
8
4
4

1

4
4
1
1
4
8
4
4

W.B

MV

E07 103 003
E07 158 003
E07 103 317
E07 103 037
E07 103 975
E07 103 100
E07 103 010
E07 103 303
E07 103 044
E07 103 031
E07 103 032

AIR OUTLET GRILLE
AIR OUTLET GRILLE
WIRELSS REMOTE CONTROL BOARD
AUTO VANE
CORNER PANEL
AIR FILTER
INTAKE GRILLE
VANE MOTOR
VANE BUSH
GEAR (V)
GEAR (M)

Parts name

SLP-2AL SLP-2AA

Q'ty/set

PANEL PARTS
SLP-2AL(FOR SLZ-KA25/35/50VAL.TH)
SLP-2AA(FOR SLZ-KA25/35/50VA.TH)

1

10

9
8

3

2

7

4

5

6

30

ELECTRICAL PARTS

No.

Parts No.

Parts name

Specification

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

1
2

3

4
5
6
7

E07 006 382
E02 661 385
E07 162 447
E07 164 447
E07 166 447
E07 162 375
E07 156 375
E07 154 440
E02 095 350

FUSE
VARISTOR
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
TERMINAL BLOCK
TERMINAL BLOCK
INDOOR POWER BOARD
INDOOR FAN CAPACITOR

FUSE

ZNR

I.B
I.B
I.B

TB4

TB15

P.B

C1

250V 6.3A

3P(S1,S2,S3)
2P(1,2)

1.5+/ 440VAC

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
1

1
1

1
1
1
1
1

SLZ-KA

Q'ty/set

3525 50 3525 50

VAL.TH VA.TH

SLZ-KA25VAL.TH SLZ-KA25VA.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH

7

1 32

6

5

4

TO OUTDOOR

UNIT

31

FUNCTIONAL PARTS

ON/OFF

RESET

TOO

WARM

TOO
COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

ON/OFF

TEMP.

SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH

2

22

1

23

3

3

4

22

21

20

5

19

18

17

6

16

15

7

8

24

9

10

11

12

13

25

26

14

27

32

No.

Parts No. Specification

1

E07 104 290

2

E07 104 124

3

E07 104 808

4

E07 105 124
E07 140 620

5

E07 141 620
E07 142 620

6

E07 104 105
E07 162 300

7

E07 164 300
E07 166 300

8

E07 104 816

9

E07 104 502

10

E07 104 097

11

E07 104 700

12

E07 154 308

13

E07 104 520

14

E07 104 524

15

E07 104 648

16

E07 154 309

17

E07 154 307

18

E07 104 702

19

E07 104 266

20

E07 104 241

21

E07 104 355

22

E07 104 809

23

E07 154 006

24

E07 140 426

25

E02 527 083

26

E07 159 426

27

E07 018 089

Parts name

BASE
DRUM-1
LEG-1
DRUM-2
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
MOTOR MOUNT
INDOOR FAN MOTOR
INDOOR FAN MOTOR
INDOOR FAN MOTOR

PK6V15-LD
PK6V20-LL

PK6V20-LM
FLAT PLATE
TURBO FAN
SPL WASHER
DRAIN PAN
ROOM TEMPERATURE THERMISTOR
FAN GUARD
DRAIN PLUG
COIL SUPPORT

CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR

PIPE TEMPERATURE THERMISTOR / LIQUID
DRAIN HOSE
DRAIN SENSOR
SENSOR HOLDER
DRAIN PUMP
LEG-2
COVER (DRUM)
WIRELESS REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER
REMOTE CONTROLLER
REMOTE CONTROLLER CABLE

Q'ty/set

SLZ-KA

3525 50 3525 50

VAL.TH VA.TH

1

1

1

1

1

1

1

1

1

1

2

2

2

2

2

1

1

1

1

1
1

1

1

1

1

3

3

3

3

3
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

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

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

2

2

2

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Remarks

(Drawing No.)

1
1
2
1

1

3PCS/SET

3

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1

1
1

Wiring

Diagram

Symbol

MF
MF
MF

TH1

TH5
TH2

DS

DP

W.R

Recom­mended

Q'ty

33

RoHS PARTS LIST11

No.

RoHS

Parts No.

Specification

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

1

2

3

4

5

6

7
8
9

10

1

1

4

4

1

1

4

8

4

4

1

4

4

1
1

4
8
4
4

W.B

MV

E17 103 003
E17 158 003
E17 423 003
E17 424 003
E17 103 317
E17 103 037
E17 423 037
E17 103 975
E17 423 975
E17 103 100
E17 103 010
E17 423 010
E17 103 303
E17 103 044
E17 103 031
E17 103 032

AIR OUTLET GRILLE
AIR OUTLET GRILLE
AIR OUTLET GRILLE
AIR OUTLET GRILLE
WIRELSS REMOTE CONTROL BOARD
AUTO VANE
AUTO VANE
CORNER PANEL
CORNER PANEL
AIR FILTER
INTAKE GRILLE
INTAKE GRILLE
VANE MOTOR
VANE BUSH
GEAR (V)
GEAR (M)

Parts name

AL

SLP-2

AA

1

1

4

4
1

1
4
8
4
4

1

4

4
1

1
4
8
4
4

ALW AAW

Q'ty/set

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

PANEL PARTS
SLP-2AL (FOR SLZ-KA25/35/50VAL.TH)
SLP-2AA (FOR SLZ-KA25/35/50VA.TH)
SLP-2ALW (FOR SLZ-KA25/35/50VAL1.TH)
SLP-2AAW (FOR SLZ-KA25/35/50VA1.TH)

2

1

10

9
8

3

7

4

5

6

34

ELECTRICAL PARTS

G
G
G
G
G
G
G
G
G

No.

RoHS

Parts No.

Parts name

Specification

Remarks

(Drawing No.)

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

1
2

3

4
5
6
7

E17 006 382
E12 661 385
E17 162 447
E17 164 447
E17 166 447
E17 162 375
E17 156 375
E17 154 440
E12 095 350

FUSE
VARISTOR
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
INDOOR CONTROLLER BOARD
TERMINAL BLOCK
TERMINAL BLOCK
INDOOR POWER BOARD
INDOOR FAN CAPACITOR

FUSE

ZNR

I.B
I.B
I.B

TB4

TB15

P.B

C1

250V 6.3A

3P(S1,S2,S3)
2P(1,2)

1.5+/ 440VAC

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
1

1
1

1
1
1
1
1

SLZ-KA

Q'ty/set

3525 50 3525 50

VAL

(1).TH VA(1).TH

SLZ-KA25VAL.TH SLZ-KA25VA.TH SLZ-KA25VAL1.TH SLZ-KA25VA1.TH
SLZ-KA35VAL.TH SLZ-KA35VA.TH SLZ-KA35VAL1.TH SLZ-KA35VA1.TH
SLZ-KA50VAL.TH SLZ-KA50VA.TH SLZ-KA50VAL1.TH SLZ-KA50VA1.TH

7

1 32

6

5

4

TO OUTDOOR

UNIT

35

FUNCTIONAL PARTS

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

ON/OFF

TEMP.

SLZ-KA25VAL.TH
SLZ-KA35VAL.TH
SLZ-KA50VAL.TH
SLZ-KA25VA.TH
SLZ-KA35VA.TH
SLZ-KA50VA.TH
SLZ-KA25VAL1.TH
SLZ-KA35VAL1.TH
SLZ-KA50VAL1.TH
SLZ-KA25VA1.TH
SLZ-KA35VA1.TH
SLZ-KA50VA1.TH

22

23

1

3

2

3

4

22

21

20

5

6

7

8

9

10

19

18

17
16

15

24

25

11

12

13

26

14

27

36

No.

1
2
3
4

5

6

7

8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

RoHS

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

Parts No. Specification

E17 104 290
E17 104 124
E17 104 808
E17 105 124
E17 140 620
E17 141 620
E17 142 620
E17 104 105
E17 162 300
E17 164 300
E17 166 300
E17 104 816
E17 104 502
E17 104 097
E17 104 700
E17 154 308
E17 104 520
E17 104 524
E17 104 648
E17 154 309
E17 154 307
E17 104 702
E17 104 266
E17 104 241
E17 104 355
E17 104 809
E17 154 006
E17 140 426
E12 527 083
E17 159 426
E17 018 089

Parts name

BASE
DRUM-1
LEG-1
DRUM-2
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
INDOOR HEAT EXCHANGER
MOTOR MOUNT
INDOOR FAN MOTOR
INDOOR FAN MOTOR
INDOOR FAN MOTOR

PK6V15-LD
PK6V20-LL

PK6V20-LM
FLAT PLATE
TURBO FAN
SPL WASHER
DRAIN PAN
ROOM TEMPERATURE THERMISTOR
FAN GUARD
DRAIN PLUG
COIL SUPPORT

CONDENSER / EVAPORATOR
TEMPERATURE THERMISTOR

PIPE TEMPERATURE THERMISTOR / LIQUID
DRAIN HOSE
DRAIN SENSOR
SENSOR HOLDER
DRAIN PUMP
LEG-2
COVER (DRUM)
WIRELESS REMOTE CONTROLLER
REMOTE CONTROLLER HOLDER
REMOTE CONTROLLER
REMOTE CONTROLLER CABLE

Q'ty/set

SLZ-KA

3525 503525

VAL

(1).TH VA(1).TH

1

1

1

1

1

1

2

2

2

1

1

1
1

1

1
3

3

3
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

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

2

1

1

1

1

1

1

1

1

1

Remarks

(Drawing No.)

50

1

1

1

1

1

1

2

2

2

1

1

1

Wiring

Diagram

Symbol

Recom-

mended

Q'ty

1

1

1

3PCS/SET

3

3

3
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

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

2

2

1

1

1

MF
MF
MF

TH1

TH5
TH2

DS

DP

W.R

1

1

1

1

1

1

37

38

39

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

CCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.
Distributed in Jul. 2007 No.OC320 REVISED EDITION-B PDF 7
Distributed in Sep. 2006 No.OC320 REVISED EDITION-A PDF 7
Distributed in Feb. 2005 No.OC320 PDF 8
Made in Japan

New publication, effective Jul. 2007
Specifications subject to change without notice.