Mitsubishi SLZ-A09AR.TH, SLZ-A12AR.TH, SLZ-A18AR.TH Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

No. OC302

TECHNICAL & SERVICE MANUAL

	Ceiling Cassettes	R410A
Series SLZ
Indoor unit
[Model names]	[Service Ref.]
SLZ-A09AR	SLZ-A09AR.TH
SLZ-A12AR	SLZ-A12AR.TH
SLZ-A18AR	SLZ-A18AR.TH

•This manual does not cover outdoor units. When servicing them, please refer to the service manual No.OC304 and this manual in a set.

CONTENTS

		1. PART NAMES AND FUNCTIONS ······
		2. SPECIFICATIONS ·············
		3. OUTLINES AND DIMENSIONS ·······
		4. WIRING DIAGRAM ············
		5. REFRIGERANT SYSTEM DIAGRAM······
	INDOOR UNIT	6. TROUBLESHOOTING ···········
		7. 4-WAY AIR FLOW SYSTEM ········
		8. DISASSEMBLY PROCEDURE ·······
	h	9. PARTS LIST ···············
	ON/OFF TOO TOO
	WARM COOL

FAN SELECT

AUTO COOL

HEAT DRY VANE TIME

MODE

RESET

REMOTE CONTROLLER

1 PART NAMES AND FUNCTIONS

Indoor Unit

SLZ-A09AR.TH

SLZ-A12AR.TH

SLZ-A18AR.TH

Horizontal Air Outlet

Sets airflow horizontal automatically during cooling or dehumidifying.

Filter

Remove dust and pollutants from inhaled air

Grille

Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction.

Air Intake

Inhales air from room.

Remote controller

ON / OFF button

Pushing button starts operation. Pushing again stops operation.

MODE SELECT button

This button is used to change between auto, cooling, heating and drying operation modes. (SLZ)

h

ON/OFF TOO TOO WARM COOL

FAN SELECT

AUTO COOL

HEAT DRY VANE TIME

MODE

RESET

Attention :

SET TEMPERATURE button

SET TEMPERATURE button sets and any desired room temperature.

TIMER SELECT button

Used for selecting timed starting or stopping.

FAN SPEED button

This button is used to set fan speed to low, medium or high.

VANE CONTROL button

Used to change the airflow direction.

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

2

2 SPECIFICATIONS

Indoor model

Function

Power supply

Capacity Air flow (High/Med./Low)

			Power outlet
	Electrical	data	Running current 1
			Power input	Rated frequency
			Dew prevention heater
			Power factor 1
			Fan motor current 1
	Fan	motor	Model
			Winding
			resistance (at20:)
				Width
	Dimensions			Height
				Depth
			Weight
			Air direction
			Sound level(High/Med./Low)
	Special	remarks	Fan speed(High/Med./Low)
			Thermistor RT11(at25:)
			Fan speed	regulator

Thermistor RT12(at25:)

Thermistor RT13(at25:) Remote controller model

	SLZ-A09AR.TH			SLZ-A12AR.TH		SLZ-A18AR.TH
	Cooling	Heating		Cooling	Heating	Cooling	Heating
	Single phase			Single phase		Single phase
	230V, 50Hz			230V, 50Hz		230V, 50Hz
K /h	600/540/480			660/600/540		660/600/540
A	10			10			20
A	0.18			0.23			0.24
W	40			52			53
(kW)	0.014			0.014			0.014
%	91	92		94	95	97	97
A	0.18			0.23			0.24
	PK6V15-LA			PK6V20-LE		PK6V20-LF
	WHT-BLK : 407	BLK-BLU : 55	WHT-BLK : 384		BLK-BLU : 111	WHT-BLK : 317 BLK-BLU : 88
"	BLU-YLW : 31	YLW-BRN : 30	BLU-YLW : 49		YLW-BRN : 46	BLU-YLW : 52 YLW-BRN : 45
	BRN-RED : 165			BRN-RED : 311		BRN-RED : 301
mm(in)		UNIT : 570(22-7/16)			PANEL : 650(25-9/16)
mm(in)		UNIT : 208(8-3/16)			PANEL : 20(13/16)
mm(in)		UNIT : 570(22-7/16)			PANEL : 650(25-9/16)
kg		UNIT : 16.5			PANEL : 3
	4				4		4
dB(A)	38/35/32			39/37/34		40/38/35
rpm	650/580/530			690/630/570		710/650/590
	3				3		3
k"	10			10			10
k"	10			10			10
k"	10			10			10
	MPPC			MPPC			MPPC

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.

Specifications and rating conditions of main electric parts

INDOOR UNIT

Item	Model
Indoor fan capacitor	(C1)
Fuse	(F11)
Vane motor	(MV)
Terminal block	(TB)
Contactor	(52C)
Indoor fan motor thermal fuse
Cord Heater	(H2)

SLZ-A09AR.TH SLZ-A12AR.TH SLZ-A18AR.TH

1.5+ 440V

250V 3.15A MSBPC20 12V 250"

POWER SUPPLY : 3P TO OUTDOOR UNIT : 4P

G4A-1A-E-PS 12V DC 145:i2:

240V AC 15W

3

NOISE CRITERION CURVES

SLZ-A09AR.TH									<50Hz>
						NOTCH		SPL(dB)	LINE
							Hi	38
							Me	35
							Lo	32
	90
bar)	80
= 0.0002	70
dB (0 dB									NC-70
	60
LEVEL,
									NC-60
PRESSURE	50
									NC-50
	40
SOUND
									NC-40
BAND	30
									NC-30
OCTAVE	20	APPROXIMATE
		TERESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
		NOISE
	10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

SLZ-A18AR.TH									<50Hz>
						NOTCH		SPL(dB)	LINE
							Hi	40
							Me	38
							Lo	35
	90
bar)	80
= 0.0002	70
dB (0 dB									NC-70
	60
LEVEL,
									NC-60
PRESSURE	50
									NC-50
	40
SOUND
									NC-40
BAND	30
									NC-30
OCTAVE	20	APPROXIMATE
		TERESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
		NOISE
	10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

SLZ-A12AR.TH									<50Hz>
						NOTCH		SPL(dB)	LINE
							Hi	39
							Me	37
							Lo	34
	90
bar)	80
= 0.0002	70
dB (0 dB									NC-70
	60
LEVEL,
									NC-60
PRESSURE	50
									NC-50
	40
SOUND
									NC-40
BAND	30
									NC-30
OCTAVE	20	APPROXIMATE
		TERESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
		NOISE
	10	63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

UNIT

CEILING

1.5m

MICROPHONE

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.

4

3 OUTLINES AND DIMENSIONS

SLZ-A09AR.TH

SLZ-A12AR.TH

SLZ-A18AR.TH

			Wiring entry
570	72	Drainpipe	VP-25 connection (O.D.[32) Suspension bolt M10 or 3/8 (procure locally)
335	31		15~37

	530	Suspension bolt pitch	570	199 352 335 576~620 Ceiling hole		202 230
						17
Freshair intake		Suspensionboltpitch		56	15~37	(gas)	(liquid)
		420		57
	576~620Ceilinghole			15~37
15~37						pipe	pipe
	[73.4 outCuthole					Refrigerent	Refrigerent
intake				°
				120
of fresh air	25	[-32.8 hole Burringhole		Ceilingsurface
Detaildrawing	[100		118
				°
				120

Unit : mm

Refrigerent pipe

(gas)

[9.52mm flared connection

3/8F

[9.52mm flared connection

3/8F

[12.7mm flared connection

1/2F

Refrigerent pipe

(liquid)

[6.35mm flared connection

1/4F

[6.35mm flared connection

1/4F

[6.35mm flared connection

1/4F

Models

SLZ-A09AR

SLZ-A12AR

SLZ-A18AR

182

48

235

20

Grille

holeDrain

Auto vane

intakeAir grille

Vanemotor

208

0

27

Airintakehole

+5

377

193

Ceiling surface

V/M

V/M

Grille

650 301 Air outlet hole

377 Air intake hole

Terminal block

V/M

Suspension bolt lower edge

Airoutlethole

V/M

35 55

38~58

35

55

301

93

650

66

121

PANEL)(WIRELESS

lampBYDEFROST/STAND

Emergencyoperation

switch(heating)operationEmergency

lampOperation

switch(cooling)

Receiver

5

Unit : mm

REMOTE CONTROLLER

57

17.5

				h
		ON/OFF	TOO	TOO
			WARM	COOL
		AUTO COOL	FAN	SELECT
	140
		HEAT DRY	VANE	TIME
		MODE
				RESET

D

B

A

C

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

1 Attach the remote controller holder to the desired location using two tapping screws. 2 Place 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.

6

: Connector

4 WIRING DIAGRAM

SLZ-A09AR.TH

SLZ-A12AR.TH

SLZ-A18AR.TH

CIRCUIT BREAKER		TB
		L	w WHT
		N	w BLU
			GRN/YLW
POWER SUPPLY
~/N
220-240V 220V
50Hz	60Hz	TB
								DP
12VDC 3			w RED
FOR A09/12
(1:1 SYSTEM) 220-240V~ 2			w WHT
TO OUTDOOR		N
UNIT			w BLU
CONNECTING								MF
			GRN/YLW
FOR A18 (1:1 SYSTEM)
OR MULTI SYSTEM
12VDC 3
TO OUTDOOR	2
UNIT
CONNECTING	N		GRILLE
			1 2		3 6	7 4 5 10 8 9			1
			BLU	WHT YLW ORN		RED	YLW YLW	BRN	RED
					5
			5		5	5	5	H2
			MV	MV MV MV

[LEGEND]

I.B

CND(POWER)

52C

CN29

2

5

(2 PHASE)

3

RED

4

BLK

1

RT13

CN21

1

CNC

w

FUSE

2

(LIQUID)

1

YLW

(HEATER)

3

WHT

RT12

3 RED

CN20

2

YLW

1

(INTAKE)

1

ZNR1

RED

RT11

CNP(PUMP)

X1

CN31

3

YLW

3 BLU

3

X1

(DRAIN)

2

1

YLW

1

TRANS

WHT 1

DS

DC13.1V

WHT

FAN1(FAN)

9

SKY BLU

7

WHT

X2

8

PINK

BLK

X2

GRY

5

7

BLU

X3

X3

CN90

VLT

3

6

YLW

1

X4

X4

(WIRELESS)

BLU

FAN2(FAN)

WHT

5

YLW

X5

4

BRN

5 WHT

X5

CN6V

ORN

3

RED

3

C1

(VANE)

2

RED

ORN

GRN

BRN

1

1

2

6

1

3

4

5

BLU

WHT

YLW

ORN

RED

2

3

4

5

6

7

8

9

W.R

W.B

ORN

YLW

9BLUVLT

GRY PINK

BLUSKY

REMOTE

CONTROLLER

BZ

CNB

LED2

LED1 SW1

SW2

RU

	SYMBOL	NAME	SYMBOL	NAME	SYMBOL	NAME
	I.B	INDOOR		WIRELESS REMOTE	DP	DRAIN-UP
			W.B			MACHINE
		CONTROLLER		CONTROLLER
					DS	DRAIN SENSOR
		BOARD		BOARD
	C1	FAN MOTOR	BZ	BUZZER	H2	DEW PREVENTION
		CAPACITOR				HEATER
	FUSE FUSE(3.15A)		LED1	LED	MF	FAN MOTOR
				(RUN INDICATOR)
	X1	RELAY(D.PUMP	LED2	LED	MV	VANE MOTOR
		/D.HEATER)		(HOT ADJUST)
	X2-X5	RELAY	SW1	SWITCH	RT11	ROOM TEMPERATURE
		(FAN MOTOR)		(HEATING ON/OFF)		THERMISTOR
	ZNR1	VARISTOR	SW2	SWITCH	RT12	PIPE TEMPERATURE
				(COOLING ON/OFF)		THERMISTOR / LIQUID
	52C	COMPRESSOR	RU	RECEVING UNIT	RT13	CONDENSER/EVAPORATOR
		CONTACTOR				TEMPERATURE THERMISTOR
					TB	TERMINAL BLOCK
						WIRELESS REMOTE

W.R CONTROLLER

How to remove the terminals shown at " w " mark.

" w " shows the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger.

sleeve 1 Slide the sleeve. 2 Pull the wire

while pushing the locking lever.

locking lever

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

2.Use copper conductors only. (For field wiring) 3.Symbols below indicate.

: Terminal block

The 12V DC is NOT always against the ground. Terminal 3 has 12V DC against terminal N.

However, between 3 and 2, these terminals are NOT electrically insulated by the transformer or other device.

7

5 REFRIGERANT SYSTEM DIAGRAM

SLZ-A09AR.TH

SLZ-A12AR.TH

SLZ-A18AR.TH

Strainer #50

Heat exchanger

Refrigerant GAS pipe connection

(Flare)

Condenser/evaporator

temperature thermistor

(RT13)

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant LIQUID pipe connection

(Flare)

Pipe temperature

Room temperature

thermistor/liquid

thermistor (RT11)

(RT12)

Distributor

Strainer

#50

with strainer

#50

8