Mitsubishi Electric Mr.Slim MUZ-FE NA Series Manuale utente

SERVICE MANUAL

CONTENTS

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

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

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

4. OUTLINES AND DIMENSIONS ························ 6

5. WIRING DIAGRAM············································ 7

6. REFRIGERANT SYSTEM DIAGRAM ··············· 9

7. SERVICE FUNCTIONS ··································· 10

8. MICROPROCESSOR CONTROL ··················· 12

9. TROUBLESHOOTING····································· 22

10. DISASSEMBLY INSTRUCTIONS···················· 36

MSZ-FE09NA

MSZ-FE12NA

MSZ-FE18NA

SPLIT-TYPE AIR CONDITIONERS

INDOOR UNIT

Outdoor unit service manual

MUZ-FE•NA Series (OBH543)

MXZ-A·NA Series (OB444)

MXZ-B·NA Series (OB560)

NOTE:

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

PARTS CATALOG (OBB542)

Models

MSZ-FE09NA

MSZ-FE12NA

No. OBH542

REVISED EDITION-B

MSZ-FE09NA - 8

MSZ-FE12NA - 8

Revision B:

• MSZ-FE09NA - 8and MSZ-FE12NA - 8have

been added.

Please void OBH542 REVISED EDITION-A.

MITSUBISHI

ELECTRIC

Changes

for

the

Better

1TECHNICAL CHANGES

MSZ-FE09NA

MSZ-FE12NA

MSZ-FE18NA

1. New model

Revision A:

• MSZ-FE18NA has been added.

Use the speciﬁed refrigerant only

Never use any refrigerant other than that specified.

Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of.

Correct refrigerant is specified in the manuals and on the spec labels provided with our products.

We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by

failure to follow the instructions.

Revision B:

• MSZ-FE09NA - 8and MSZ-FE12NA - 8have been added.

MSZ-FE09NA MSZ-FE09NA - 8

MSZ-FE12NA MSZ-FE12NA - 8

1. These models have been modified to be compatible with Honeywell remote controller.

2. Indoor electronic controll P.C. board has been changed.

➔

PART NAMES AND FUNCTIONS

MSZ-FE09NA MSZ-FE12NA

Front panel

Air ﬁlter

Air inlet

Operation indicator

lamp

Platinum deodorizing ﬁlter

Anti-allergy Enzyme Filter

Air outlet

Horizontal vane

i-see Sensor

Heat exchanger

Emergency operation switch (E.O. SW)

Remote control

receiving section

AREA lamp POWER lamp

Fan

Remote controller

Display section

AREA lamp indicates AREA setting

In AREA setting, the horizontal air

ﬂow direction changes automatically

according to the detection of i-see

Sensor which detects the ﬂoor/wall

temperature to air-condition the room

evenly.

i-see control operation

i-see Sensor constantly measure

ﬂoor/wall temperature to automatically

adjust to the set temperature by

estimating the temperature actually

perceived by a person inside the room

(“sensible temperature”).

□

Remote controller

Display section

Front panel

Air ﬁlter

(Nano platinum filter)

Air inlet

Air cleaning filter

(Electrostatic anti-alergy

enzyme filter)

Air outlet

Horizontal vane

Heat exchanger

MSZ-FE18NA

ACCESSORIES

Models MSZ-FE09/12NA MSZ-FE18NA

Installation plate 1 1

Installation plate ﬁxing screw 4 × 25 mm 5 7

Remote controller holder 1 1

Fixing screw for 3.5 × 1.6 mm (Black) 2 2

Battery (AAA) for remote controller 2 2

Wireless remote controller 1 1

Felt tape (Used for left or left-rear piping) 1 1

Air cleaning ﬁlter

( )

c==)l------------'7

'•

, '

, ,

, '

(J)

, '

' '

, '

, ,

: '

, '

' '

, '

------:

;-'

----,

(--------Op;~;ti~~i~-di~~t~;i~-~p-~~-----,l

! Emergency operation switch

---'DJ

: (E.O. SW)

[ Remote control receiving section

---r________J

.......

_____________________________________________________

3SPECIFICATION

Indoor model MSZ-FE09NA MSZ-FE12NA MSZ-FE18NA

Power supply V, phase, Hz 208/230 , 1 , 60

Max. fuse size (time delay)/ Disconnect switch

A15 20

Min. circuit ampacity A 1.0

Fan motor F.L.A 0.76

Airﬂow

Powerful - High - Med. - Low

COOL Dry

(Wet)

CFM 381 - 339 - 226 - 162

(343 - 307 - 202 - 144)

410 - 381 - 226 - 162

(367 - 350 - 202 - 144)

738 - 628 - 469 - 388

(661 - 562 - 420 - 347)

HEAT Dry CFM 381 - 367 - 240 - 166 420 - 399 - 240 - 166 738 - 628 - 469 - 388

Moisture removal pt./h 2.1 2.9 2.7

Sound level

Powerful - High - Med. - Low

Cooling dB(A) 42 - 39 - 31 - 22 45 - 43 - 33 - 22 53 - 49 - 41 - 34

Heating dB(A) 42 - 40 - 31 - 22 44 - 43 - 33 - 22 52 - 49 - 41 - 32

Cond. drain connection O.D. in. 5/8

Dimensions

in.

31-3/8 43-5/16

D 10-1/8 9-3/8

H 11-5/8 12-13/16

Weight Ib. 27 37

External ﬁnish Munsell 1.0Y 9.2/0.2

Remote controller Wireless type

Control voltage (by built-in transformer) 12 - 24 VDC

NOTE: Test conditions are based on AHRI 210/240.

3-2. OUTLET AIR SPEED AND COVERAGE

 The air coverage is the figure up to the

position where the air speed is 1 ft./s,

when air is blown out horizontally from

the unit properly at the High speed

position.

The coverage should be used only

as a general guideline since it varies

according to the size of the room and

furniture arranged inside the room.

(2) OPERATION

Mode Condition

Intake air temperature (°F)

Indoor Outdoor

DB WB DB WB

Cooling

Standard temperature 80 67 95 —

Maximum temperature 90 73 115 —

Minimum temperature 67 57 14 —

Maximum humidity 78% —

Heating

Standard temperature 70 60 47 43

Maximum temperature 80 67 75 65

Minimum temperature 70 60 -13 -15

3-1. OPERATING RANGE

(1) POWER SUPPLY

Rated voltage Guaranteed voltage (V)

Indoor unit

208/230 V

1 phase

60 Hz

Min. 187 208 230 Max. 253

Model Mode Function Airﬂow

(CFM)

Air speed

(ft./s)

Coverage

(ft.)

MSZ-FE09NA

HEAT Dry 381 19.2 27.7

COOL Dry 339 17.1 24.7

Wet 307 15.5 22.4

MSZ-FE12NA

HEAT Dry 420 21.2 30.4

COOL Dry 381 19.2 27.7

Wet 350 17.6 25.4

MSZ-FE18NA

HEAT Dry 738 18.0 36.9

COOL Dry 738 18.0 36.9

Wet 661 16.1 33.2

□~-------

-------+-I

--+----+--+I-------

4OUTLINES AND DIMENSIONS

Unit: inch

MSZ-FE09NA MSZ-FE12NA

30-7/8

31-3/8

1/2

1-7/8

2-3/16

11-5/8

27-1/16

3/4

2-5/16

6-1/4

1-11/16

2-11/16

2-3/16

3-15/16

1/2

10-1/8 1/4 Installation plate

Piping

2-3/16

Drain hose

1-11/16

3-3/8

3-13/16

Air out

Indoor unit 2-1/8

1-5/8

2-1/2

Installation plate

7/16 X 1 Oblong hole

8-7/8 8-7/8

8-3/8

13-9/16 13

6-1/8 6-1/8

Wall hole ø2-9/16

2-11/16

1/8

1-5/8

8-5/16

9-1/8

9-15/16

7/8

2-1/2

7/16 X 13/16 Oblong hole

ø1-3/8 O.D

ø1/4 19-11/16 (Flared connection ø1/4)

ø3/8 16-15/16 (Flared connection ø3/8)

Insulation ø1-1/8 O.D Connected part ø5/8 O.D

Air in

Piping

Insulation

Liquid line

Gas line

Drain hose

MSZ-FE18NA

42-7/8 3/16

43-5/16

1-3/4 9-3/8

10-3/16

1/8

8-7/8 8-7/8

5-1/16

9-7/16

11-1/16

1-3/4

1-15/16 19-3/4 17-5/16

7-27/327-27/32

4-3/8

2-9/16

2-1/2

3 33-1/8 7-1/8

2-9/16

1-3/16

2-1/2

2-9/16

2-5/8

2-1/2

12-13/16

1/8

3-15/16

4-7/8

6-5/16

4-5/16

(

70°

)

9-3/8

3/16

8-1/4

27/32

7-1/4

1/2

Piping

Insulation Ø2 O.D

Liquid line Ø3/8 19-11/16 (Flared connection Ø3/8)

Gas line Ø1/2 16-15/16 (Flared connection Ø5/8)

Drain hose

Insulation Ø1-1/8 Connected part Ø5/8 O.D

Air out

Piping

Drain hose

7/16×1 Oblong hole 7/16×3/4 Oblong hole

Installation plate

Indoor unit

Wall hole

Air in Installation plate

3/4

6-1/4

2-5/16

□

I I

5WIRING DIAGRAM

MSZ-FE09NA MSZ-FE12NA

□

~------____J

LDI051Sl

BOARD

LDI051Tl

* A

disconnect

should

required

local

code.

SYMBOL

NAME

SYMBOL

NAME

□

Bill

DIODE

STACK

NRll

VARISTOR

Fll

FUSE

RTll

ROOM

TEMP.

IT3.

15Al.25OVl

THERMISTOR

FAN

MOTOR

RT12

COIL

TEt-1'.

THERMISTOR

11/AINl

i-see

Sensor

RT13

COIL

TEt-1',

f,fJTOR

THERMISTOR

ISUBl

MVl

VANE

f,fJTOR

Tlll

TRANSFORMER

lllJRIZONTAU

MV2

VANE

MOTOR

TERMINAL

BLOCK

IVERTICAU

INDOOR

ELECTRONIC

CONTROL

BOARD

MVl

NOTES:

Abo

t t

or si

eIectric wiring

refer

the

outdoor

unit

electric

wiring

diagram

for

servicing,

Use

copper

conductors

only.

!For

field

wiring!

lSYmbols

below

indicatL

ITIJ:

Terminal

block

1°

000

Connector

MV2 MV2

MSZ-FE18NA

MSZ-FE09NA - 8MSZ-FE12NA - 8

SYHB

□

NAME

SYHB

□

NAME

F11

FUSE

R111

RESISTOR

na.

15AL250VJ

FAN

H □

T □ R

RT11

□□

TEMP.

THERHIST

□ R

i-see

Sensor

RT12

COIL

TEM',

~TOR

THERMISTOR

<HA!Nl

MV!

VANE

MOTOR

RT13

COIL

TEM'.

UOIIZONTAll

THERMISTOR

<SUBJ

MV2

VANE

MOTOR

TIil

TRANSFORMER

<VERTICAll

NR11

VARISTOR

TERHINAl

BlOCK

NOTES:l.About

the

outdoor

side

electric

wiring

refer

the

outdoor

unit

electric

wiring

diagram

for

servicing.

1°

000

Connector

Use

copper

conductors

only.

!For

field

wiring)

3,Symbols

indicate.

ITIIJ:

Terminal

block

100001

Connector

* A

disconnect

should

required

local

code.

SYMBOL

NAME

Fil

FUSE

IT3,

15AL250VJ

FAN

MOTOR

MVI

VANE

MOTOR

IHORIZONTALl

MV2

VANE

MOTOR

IVERTICALJ

NR11

VARISTOR

R111

RESISTOR

RT11

ROOM

TEMP,

THERMISTOR

RT12

COIL

TEMP.

THERMISTOR

IMA!Nl

RT13

COIL

TEMP,

THERMISTOR

!SUBJ

T111

TRANSFORMER

TERM!

NAL

BLOCK

MSZ-FE09NA MSZ-FE12NA

Refrigerant flow in cooling

Refrigerant flow in heating

Unit: inch

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant pipe 3/8

(with heat insulator)

Refrigerant pipe 1/4

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Indoor coil

thermistor

RT13 (sub)

MSZ-FE18NA

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant pipe ø5/8

(with heat insulator)

Refrigerant pipe ø3/8

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Indoor coil

thermistor

RT13 (sub)

Refrigerant flow in cooling

Refrigerant flow in heating

REFRIGERANT SYSTEM DIAGRAM

□

-----➔

7-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board.

The time will be shortened as follows. (Refer to 9-7.)

Set time: 1-minute 1-second

Set time: 3-minute 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is

shortened by short circuit of JPG and JPS.)

7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

A maximum of 4 indoor units with wireless remote controllers can be used in a room.

In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be

modified according to the number of the indoor unit.

How to modify the remote controller P.C. board

Remove batteries before modification.

The board has a print as shown below:

The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1.

After modification, press the RESET button.

NOTE: For modification, take out the batteries and

press the OPERATE/STOP (ON/OFF) but-

ton twice or 3 times at first.

After finish modification, put back the bat-

teries then press the RESET button.

MSZ-FE09NA MSZ-FE12NA MSZ-FE18NA

Table 1

1 unit operation 2 units operation 3 units operation 4 units operation

No. 1 unit No modiﬁcation Same as at left Same as at left Same as at left

No. 2 unit — Solder J1 Same as at left Same as at left

No. 3 unit — — Solder J2 Same as at left

No. 4 unit — — — Solder both J1 and J2

How to set the remote controller exclusively for particular indoor unit

After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote

controller for the indoor unit.

The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are

set.

The setting will be cancelled if the breaker has turned OFF, or the power supply has shut down.

Please conduct the above setting once again after the power has restored.

7SERVICE FUNCTIONS

□

➔

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