Mitsubishi Electric MSZ-FS12NA-U1 Manuale utente

INDOOR UNIT

SERVICE MANUAL

INDOOR UNIT

Models

MSZ-FS06NA -U1

MSZ-FS09NA -U1

MSZ-FS12NA -U1

MSZ-FS15NA -U1

MSZ-FS18NA -U1

No. OBH872

PARTS CATALOG (OBB872)

Outdoor unit service manual

MUZ-FS∙NA(H) Series (OBH873)

MXZ-C∙NA,NAHZ Series (OBH702)

CONTENTS

1. TECHNICAL CHANGES ······························3

2. PART NAMES AND FUNCTIONS ··················4

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

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

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

6. REFRIGERANT SYSTEM DIAGRAM ·············8

7. SERVICE FUNCTIONS································9

8. MICROPROCESSOR CONTROL················· 11

9. TROUBLESHOOTING·······························20

10. DISASSEMBLY INSTRUCTIONS·················33

Use the specied 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.

OBH872

1TECHNICAL CHANGES

MSZ-FS06NA - U1

MSZ-FS09NA - U1

MSZ-FS12NA - U1

MSZ-FS15NA - U1

MSZ-FS18NA - U1

1. New model

OBH872

2PART NAMES AND FUNCTIONS

ACCESSORIES

Model

MSZ-FS06NA

MSZ-FS09NA

MSZ-FS12NA

MSZ-FS15NA

MSZ-FS18NA

Installation plate 1

Attachment screws for the installation

plate 4 × 25 mm 5

Remote controller holder 1

Screw for the remote controller holder

3.5 × 16 mm (Black) 2

Battery (AAA) for the remote controller 2

Wireless remote controller 1

Felt tape (For left or left-rear piping) 1

Air cleaning lter

(Electrostatic anti-allergy enzyme lter) 1

Air cleaning lter (Deodorizing lter) 1

Operation indicator lamp Remote control receiving

section

Emergency

operation

switch

Horizontal

vane

Air inlet

Air ﬁlter

(Nano platinum ﬁlter)

Air cleaning ﬁlter

(Electrostatic anti-allergy

enzyme ﬁlter and deodorizing ﬁter)

Front panel

Air outlet

i-see sensor

Remote controller

MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA

OBH872

3SPECIFICATION

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 -14

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 Airow

(CFM) Air speed

(ft./s)

Coverage

(ft.)

MSZ-FS06NA HEAT Dry 437 19.5 29.8

COOL Dry 381 17.0 26.1

Wet 328 14.6 22.5

MSZ-FS09NA HEAT Dry 437 19.5 29.8

COOL Dry 381 17.0 26.1

Wet 328 14.6 22.5

MSZ-FS12NA HEAT Dry 454 20.3 31.0

COOL Dry 424 19.0 29.0

Wet 364 16.2 24.8

MSZ-FS15NA HEAT Dry 514 23.0 34.9

COOL Dry 437 19.5 29.8

Wet 376 16.7 25.6

MSZ-FS18NA HEAT Dry 514 23.0 34.9

COOL Dry 437 19.5 29.8

Wet 376 16.7 25.6

Indoor unit model MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA

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

Disconnect switch A 15

Min. circuit ampacity A 1.0

Fan motor F.L.A 0.65

Airow

Super high - High -

Med. - Low - Quiet

COOL Dry

(Wet)

CFM

381- 304 - 221 - 167 - 137

(328 - 261 - 190 - 143 - 117)

381- 304 - 221 - 167 - 137

(328 - 261 - 190 - 143 - 117)

424 - 304 - 221 - 167 - 137

(364- 261 - 190 - 143 - 117)

437 - 355 - 304 - 262 - 225

(376 - 305 - 261 - 225 - 194)

437 - 355 - 304 - 262 - 225

(376 - 305 - 261 - 225 - 194)

HEAT Dry

CFM

437 - 381 - 225 - 167 - 140 437 - 381 - 225 - 167 - 140 454 - 367 - 282 - 226 - 155 514 - 410 - 350 - 272 - 201 514 - 410 - 350 - 272 - 201

Moisture removal pt./h 0.2 0.6 1.9 4.0 5.1

Sound level

Super high - High -

Med. - Low - Quiet

Cooling

dB(A)

40 - 36 - 29 - 23 - 20 40 - 36 - 29 - 23 - 20 44 - 36 - 29 - 24 - 21 44 - 39 - 35 - 31 - 27 44 - 39 - 35 - 31 - 27

Heating

dB(A)

42 - 39 - 29 - 24 - 20 42 - 39 - 29 - 24 - 20 43 - 38 - 32 - 28 - 21 46 - 40 - 37 - 31 - 25 46 - 40 - 37 - 31 - 25

Cond. drain connection O.D.

in. 5/8

Dimensions Win. 36-7/16

D 9-3/16

H 12 (+ 11/16)

Weight Ib. 29

External nish 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.

OBH872

4OUTLINES AND DIMENSIONS

Unit: inch

MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA

(MSZ-FS06/09/12NA) (MSZ-FS15/18NA)

OBH872

5WIRING DIAGRAM

MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA

OBH872

6REFRIGERANT SYSTEM DIAGRAM

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant pipe ø3/8 (ø9.52)

(with heat insulator)

Refrigerant pipe ø1/4 (ø6.35)

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Indoor coil

thermistor

RT13 (sub)

Refrigerant flow in cooling

Refrigerant flow in heating

Unit: inch (mm)

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant pipe ø1/2 (ø12.7)

(with heat insulator)

Refrigerant pipe ø1/4 (ø6.35)

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Indoor coil

thermistor

RT13 (sub)

Refrigerant flow in cooling

Refrigerant flow in heating

MSZ-FS15NA MSZ-FS18NA

MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA

OBH872

7SERVICE FUNCTIONS

7-1. TIMER SHORT MODE

For service, the following set time can be shortened by bridging JPG and JPS on the electronic control P.C. board.

(Refer to 9-7.)

Set time: 3 minutes → 3 seconds (It takes 3 minutes for the compressor to start operation. However, the starting time is

shortened by bridging JPG and JPS.)

7-2. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT

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

To operate the indoor units individually with each remote controller, assign a number to each remote controller according

to the number of the indoor unit.

This setting can be set only when all the following conditions are met:

• The remote controller is powered OFF.

• Weekly timer is not set.

• Weekly timer is not being edited.

(1) Hold down button on the remote controller for 2 seconds to enter the pairing mode.

(2) Press button again and assign a number to each remote controller.

Each press of button advances the number in the following order: 1 → 2 → 3 → 4.

(3) Press button to complete the pairing setting.

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

remote controller for the indoor unit.

Once they are set, the indoor unit will only receive the signal from the assigned remote controller afterwards.

7-3. SETTING THE INSTALLATION POSITION

Be sure to set the remote controller according to the installed position of the indoor unit.

Installation position:

Left: Distance to objects (wall, cabinet, etc.) is less than 50 cm to the left

Center: Distance to objects (wall, cabinet, etc.) is more than 50 cm to the left and right

Right: Distance to objects (wall, cabinet, etc.) is less than 50 cm to the right

The installation position can be set only when all the following conditions are met:

• The remote controller is powered OFF.

• Weekly timer is not set.

• Weekly timer is not being edited.

(1) Hold down button on the remote controller for 2 seconds to enter the position setting mode.

(2) Select the target installation position by pressing button. (Each press of the button displays the

positions in order: center → right → left.)

(3) Press button to complete the position setting.

Installation position Left Center Right

Remote controller

display

(Left)(Center)(Right)

MSZ-FS06NA MSZ-FS09NA MSZ-FS12NA MSZ-FS15NA MSZ-FS18NA

OBH872

7-4. AUTO RESTART FUNCTION

When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed

are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in

the same mode just before the shutoff of the main power.

Operation

If the main power has been cut, the operation settings remain.

After the power is restored, the unit restarts automatically according to the memory.

(However, it takes at least 3 minutes for the compressor to start running.)

How to disable “AUTO RESTART FUNCTION”

Turn off the main power for the unit.

Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 9-7.)

NOTE:

• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote

controller.

• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-

celled.

• If the unit has been off with the remote controller before power failure, the auto restart function does not work as the

power button of the remote controller is OFF.

• To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the same

time.

• When some air conditioners are connected to the same supply system, if they are operated before power failure, the

starting current of all the compressors may flow simultaneously at restart.

Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current

by adding to the system that allows the units to start one by one.

JR77

CN110CN151

Indoor electronic control

P.C. board

OBH872

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