Mitsubishi Electric SLZ-KA25VA.TH Manual de funcionamiento

TECHNICAL & SERVICE MANUAL

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

CONTENTS

1. PART NAMES AND FUNCTIONS ········2

2. SPECIFICATIONS·································5

3. OUTLINES AND DIMENSIONS············7

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

REFRIGERANT SYSTEM DIAGRAM

·······11

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

7. 4-WAY AIR FLOW SYSTEM···············19

8. DISASSEMBLY PROCEDURE ···········21

9. PARTS LIST········································24

No. OC320

REMOTE CONTROLLER

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

Indoor unit

[Model names] [Service Ref.]

SLZ-KA25VA SLZ-KA25VA.TH

SLZ-KA35VA SLZ-KA35VA.TH

SLZ-KA50VA SLZ-KA50VA.TH

SLZ-KA25VAL SLZ-KA25VAL.TH

SLZ-KA35VAL SLZ-KA35VAL.TH

SLZ-KA50VAL SLZ-KA50VAL.TH

Note :

•This manual does not cover

outdoor units. When servicing

outdoor units, please refer

to the service manual

No.OC322 together with this

manual.

INDOOR UNIT

Model name

indication

ON/OFF

TEMP.

SLZ-KA25,35,50VAL.TH SLZ-KA25,35,50VA.TH

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1PART NAMES AND FUNCTIONS

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

ON / OFF button

Pushing button starts

operation. Pushing again

stops operation.

●Avoid operation of buttons with fingernails or other sharp objects. Sharp objects may scratch remote controller.

Attention :

Auto Air Swing Vane

Disperses airflow up and

down and adjusts the angle

of airflow direction.

Grille

Filter

Remove dust and pollutants

from inhaled air

Horizontal Air Outlet

Sets airflow horizontal automatically

during cooling or dehumidifying.

Air Intake

Inhales air from room.

SET TEMPERATURE

button

SET TEMPERATURE

button sets and any

desired room temperature.

MODE SELECT button

This button is used to change

between auto, cooling,

heating and drying operation

modes. (SLZ)

This button is used to set

fan speed to low, medium

or high.

TIMER SELECT button

Used for selecting timed

starting or stopping.

FAN SPEED button

Used to change the airflow

direction.

VANE CONTROL button

Wireless remote controller

SLZ-KA25VAL.TH

SLZ-KA35VAL.TH

SLZ-KA50VAL.TH

Indoor Unit

SLZ-KA25VAL.TH SLZ-KA25VA.TH

SLZ-KA35VAL.TH SLZ-KA35VA.TH

SLZ-KA50VAL.TH SLZ-KA50VA.TH

OC320-1.qxp 05.2.24 8:52 AM Page 2

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Wired remote controller

● Operation buttons [ PAR-21MAA ]

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

SLZ-KA25VA.TH

SLZ-KA35VA.TH

SLZ-KA50VA.TH

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

BACK DAY

MONITOR/SET

CLOCK

ON/OFF

Set Temperature buttons

Down

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.

Start/Stop button

Fan Speed button

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.

OC320-1.qxp 05.2.24 8:52 AM Page 3

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Caution

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

●When power is turned ON for the first time the (Centrally controlled) display appears to go off momentarily but this is not a

malfunction.

●“NOT AVAILABLE” is displayed when the Air speed button are pressed.This indicates that this room unit is not equipped

with the fan direction adjustment function and the louver function.

●When power is turned ON for the first time, it is normal that “PLEASE WAIT” is displayed on the room temperature indica-

tion (For max. 2minutes). Please wait until this “PLEASE WAIT” indication disappear then start the operation.

●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.

˚F˚C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

OFF

AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

Identifies the current operation

Shows the operating mode, etc.

*Multilanguage display is sup-

ported.

“Centrally Controlled” indicator

Indicates that operation of the re-

mote controller has been prohib-

ited 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, shows the time

remaining.

“Sensor” indication

Displayed when the remote controller

sensor is used.

“Locked” indicator

Indicates that remote controller but-

tons 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 corre-

sponding timer is set.

Up/Down Air Direction indica-

tor

The indicator shows the direc-

tion of the outcoming airflow.

“One Hour Only” indicator

Displayed if the airflow is set to

weak and downward during COOL

or DRY mode. (Operation varies

according to model.)

The indicator goes off after one

hour, at which time the airflow di-

rection 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.

Fan Speed indicator

Shows the selected fan speed.

Ventilation indicator

Appears when the unit is running in

Ventilation mode.

OC320-1.qxp 05.2.24 8:52 AM Page 4

Mitsubishi ilmalämpöpumput korjaa ja huoltaa: Jäähdytinpalvelu RefGroup Oy (pääkaupunkiseutu)

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SPECIFICATIONS

SLZ-KA25VAL.TH

SLZ-KA25VA.TH SLZ-KA35VAL.TH

SLZ-KA35VA.TH

Indoor model

Function

Power supply Single phase

230V, 50Hz

600/540/480

0.35

0.014

0.19

PK6V15-LD

37/31/28

650/530/480

Cooling

Heating

Single phase

230V, 50Hz

660/540/480

0.40

0.014

0.26

PK6V20-LL

38/33/29

690/570/510

Cooling

Heating

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 (at20:)

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

(kW)

mm(in)

dB(A)

rpm

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.TH

SLZ-KA50VA.TH

Single phase

230V, 50Hz

660/540/480

0.65

0.014

0.27

PK6V20-LM

39/34/30

710/590/530

Cooling

Heating

WHT-BLK : 325 BLK-BLU : 143

BLU-YLW : 47

BRN-RED : 309

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:

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

Refrigerant piping length (one way): 5m

✽1 Measured under rated operating frequency.

1.5+ 440V

250V 6.3A

MSBPC20 12V 250"

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

145:i2:

240V AC 15W

INDOOR UNIT

Item Model

Indoor fan capacitor

Fuse

Vane motor

Terminal block

Indoor fan motor thermal fuse

Cord Heater

SLZ-KA25VAL.TH SLZ-KA35VAL.TH SLZ-KA50VAL.TH

(C1)

(FUSE)

(MV)

(TB)

(H2)

SLZ-KA25VA.TH SLZ-KA35VA.TH SLZ-KA50VA.TH

Specifications and rating conditions of main electric parts

OC320-1.qxp 05.2.24 8:52 AM Page 5

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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 High

Medium 38

SPL(dB)

LINE

<50Hz>

NOTCH

Low 29

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 High

Medium 37

SPL(dB)

LINE

<50Hz>

NOTCH

Low 28

NOISE CRITERION CURVES

UNIT

1.5m

MICROPHONE

CEILING

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 High

Medium 39

SPL(dB)

LINE

<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 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.

OC320-1.qxp 05.2.24 8:52 AM Page 6

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OUTLINES AND DIMENSIONS

Unit : mm

SLZ-KA25VAL.TH

SLZ-KA35VAL.TH

SLZ-KA50VAL.TH

SLZ-KA25VA.TH

SLZ-KA35VA.TH

SLZ-KA50VA.TH

SLZ-KA50VA(L)

SLZ-KA35VA(L)

SLZ-KA25VA(L)

Brand label

(Case of Wired remote controller)

Terminal block Terminal block

Suspension bolt

M10 or 3/8

(procure locally)

1/4F

flared connection

{6.35mm

1/4F

flared connection

{6.35mm {9.52mm

flared connection

3/8F

1/2F

flared connection

Refrigerent pipe (liquid)

Refrigerent pipe (gas)

Models

{6.35mm

flared connection

1/4F

Refrigerent pipe

(liquid) Refrigerent pipe

(gas)

{12.7mm

{9.52mm

flared connection

3/8F

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 outlet hole

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

120°

377

650

Suspension bolt

lower edge

230

18248

Wiring entry

Ceiling surface

235

208

27 +5

0193

38~58

66121

17 202

Ceiling hole

Suspension bolt pitch

15~37 15~37576~620

420

570

335

199

352

335

Suspension bolt

pitch

Ceiling hole

V/M

OC320-1.qxp 05.2.24 8:52 AM Page 7

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WIRELESS REMOTE CONTROLLER

Installation area

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

• Area in which there is no nearby heating source.

• 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

1Attach the remote controller holder to the desired location using two tapping screws.

2Place the lower end of the controller into the holder.

AWireless remote controller (Accessory)

BWall

CRemote controller holder (Accessory)

DFixing 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.

ON/OFF

RESET

TOO

WARM

TOO

COOL

MODE

AUTO COOL

DRY

HEAT

FAN

VANE

SELECT

TIME

57 17.5

140

Unit : mm

OC320-1.qxp 05.2.24 8:52 AM Page 8

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WIRED REMOTE CONTROLLER Unit : mm

130

120

OC320-1.qxp 05.2.24 8:52 AM Page 9

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WIRING DIAGRAM

SLZ-KA25VAL.TH SLZ-KA25VA.TH

SLZ-KA35VAL.TH SLZ-KA35VA.TH

SLZ-KA50VAL.TH SLZ-KA50VA.TH

SWE

GRILLE

OFF

ON SW3

OFF 54321

SW2

OFF 54321

WHT

RED

CNDK

(POWER

BOARD)

ZNR

RED

ORN

YLW

BLU

BLU BLU

BLU

LED3

CN2L

CN32 CN51 CN41

(REMOCON)

BLU

TO OUTDOOR UNIT

ORN

MV 5

P.B

TB4S1

TB15

2TO MA-REMOTE

CONTROLLER

DC8.7-13V

}

REMOTE

CONTROLLER

W.R

CN6V

(VANE)

GRN

BLU

WHT

ORN

RED

YLW

X5 X4

X4 X7

X6 X7

97531

BLK

WHT

BLU

YLW

BRN

RED I.B

CNB

LED2

LED1

SW1

SW2

W.B 9

CN22

(2 PHASE)

CN29

BLK

WHT

RED

(INTAKE)

(LIQUID)

CN31

CN20

CN21

1 1 2

2 1 2

1 2

DS TH5 TH1 TH2

YLW

BLU

(D·U·M)

CNP

RED

(D·HEATER)

CNC 313131 CND

(POWER)

ORN

FUSE (CONTROL)

CN3C

BLU

31 31

LED1

1 2

TRANS

DC13.1V

CN2S(WHT)

AC220-240V

CNSK(RED)

WHT

BLK

(POWER

BOARD)

CN2D

WHT

LED2

* Case of wireress model

* Case of wired model

See fig:w1

MODELS

KA25

KA35

KA50

<fig:w1>

OFF 12345

SW2

YLW

RED

ORN

YLW

WHT

BLU

1 7 4 5 10 8 92 3 6

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

1 2 3 4 5 6 7 8 9

(DRAIN)

WHT

wFor details on how to operate self-diagnosis

refer to the technical manuals etc.

:Connector, :Terminal (block).

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).

NOTES:

3.Symbols used in wiring diagram above are,

SWITCH(COOLING ON/OFF)

LED(RUN INDICATOR)

SWITCH(HEATING ON/OFF)

LED(HOT ADJUST)

BUZZER

RECEIVING UNIT

WIRELESS REMOTE CONTROLLER BOARD

SW2

SW1

LED2

LED1

W.B

MF FAN MOTOR

VANE MOTOR

DRAIN-UP MACHINE

DRAIN SENSOR

DEW PREVENTION HEATER

C1 CAPACITOR(FAN MOTOR)

FUSE(T6.3AL250V)

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)

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/5.4kΩDETECT)

PIPE TEMP.THERMISTOR/LIQUID

(0°C/15kΩ,25°C/5.4kΩDETECT)

COND./EVA.TEMP.THERMISTOR

(0°C/15kΩ,25°C/5.4kΩDETECT)

[LEGEND]

OC320-1.qxp 05.2.24 8:52 AM Page 10

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