Mitsubishi Electric MSZ-SF15VA-E1 Manual de usuario

Models

MSZ-SF15VA - E1 , E2 , E3 , E4 , ER3 , ER4

MSZ-SF20VA - E1 , E2 , E3 , E4 , ER3 , ER4

NOTE:

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

INDOOR UNIT

SERVICE MANUAL

No. OBH555

REVISED EDITION-D

PARTS CATALOG (OBB555)

Revision D:

• MSZ-SF15/20VA- E4 , ER4 have been added.

Please void OBH555 REVISED EDITION-C.

CONTENTS

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

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

3. SPECIFICATION ········································4

4. NOISE CRITERIA CURVES ··························5

5. OUTLINES AND DIMENSIONS ·····················6

6. WIRING DIAGRAM ·····································7

7. REFRIGERANT SYSTEM DIAGRAM ·············8

8. SERVICE FUNCTIONS ································9

9. MICROPROCESSOR CONTROL ················ 11

10. TROUBLESHOOTING ······························· 18

11. DISASSEMBLY INSTRUCTIONS ················· 30

Outdoor unit service manual

MXZ-B∙VA Series (OBH554)

MXZ-C∙VA Series (OBH584)

MXZ-D∙VA Series (OBH626)

MXZ-8A∙VA (OC316)

MXZ-8B∙VA (OCH480)

MXZ-E∙VA Series (OBH723)

MSZ-SF15VA - E1

MSZ-SF20VA - E1

1. New model

TECHNICAL CHANGES

Revision A:

• MSZ-SF15VA- E2 and MSZ-SF20VA- E2 have 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.

MSZ-SF15VA - E1 MSZ-SF15VA - E2

MSZ-SF20VA - E1 MSZ-SF20VA - E2

1. Software has been changed for ERP.

Prepare the proper tools.

Prepare the proper protectors.

Provide adequate ventilation.

After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.

Discharge the capacitor before the work involving the electric parts.

Do not perform the work involving the electric parts with wet hands.

Do not pour water into the electric parts.

Do not touch the refrigerant.

Do not touch the hot or cold areas in the refrigeration cycle.

When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to

touch the live parts.

Revision B:

• MSZ-SF15VA- E3 and MSZ-SF20VA- E3 have been added.

MSZ-SF15VA - E2 MSZ-SF15VA - E3

MSZ-SF20VA - E2 MSZ-SF20VA - E3

1. Model name has been changed.

Revision C:

• MSZ-SF15VA- ER3 and MSZ-SF20VA- ER3 have been added.

Revision D:

• MSZ-SF15/20VA- E4 , ER4 have been added.

MSZ-SF15VA - ER3

MSZ-SF20VA - ER3

1. New model

MSZ-SF15VA - E3 MSZ-SF15VA - E4

MSZ-SF20VA - E3 MSZ-SF20VA - E4

MSZ-SF15VA - ER3 MSZ-SF15VA - ER4

MSZ-SF20VA - ER3 MSZ-SF20VA - ER4

1. Logo design has been changed.

OBH555D

ACCESSORIES

Installation plate 1

Installation plate f xing screw 4 × 25 mm 5

Remote controller holder 1

Fixing screw for 3.5 × 16 mm (Black) 2

Battery (AAA) for remote controller 2

Wireless remote controller 1

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

MSZ-SF15VA MSZ-SF20VA

PART NAMES AND FUNCTIONS

Front panel

Air f lter

Air inlet

Horizontal vane

Air outlet

Heat exchanger

Operation

Remote control

indicator lamp

receiving section

Emergency operation switch (E.O. SW)

Remote controller

OBH555D

Indoor model MSZ-SF15VA MSZ-SF20VA

Power supply Single phase 230 V, 50 Hz

Electrical

data

Power

input 1

Cooling W17 19

Heating 17 19

Running

current 1

Cooling A0.17 0.19

Heating 0.17 0.19

Fan

motor

Model RC0J40-FM

Current

Cooling A0.17 0.19

Heating 0.17 0.19

Dimensions W × H × D mm 760 × 250 × 168

Weight kg 7.7

Special remarks

Air direction 5

Airf ow

Cooling

Super High

m3/h

384 414

High 330

Med. 276

Low 234

Silent 210

Heating

Super High

m3/h

408 438

High 360

Med. 300

Low 264

Silent 222

Sound level

Cooling

Super High

dB(A)

40 42

High 35

Med. 30

Low 26

Silent 21

Heating

Super High

dB(A)

40 42

High 35

Med. 30

Low 26

Silent 21

Fan speed

Cooling

Super High

rpm

1,500 1,600

High 1,300

Med. 1,130

Low 980

Silent 900

Heating

Super High

rpm

1,500 1,600

High 1,350

Med. 1,160

Low 1,030

Silent 910

Fan speed regulator 5

Remote controller model SG10D ( E1 , E2 , E3 , ER3 )/SG15D ( E4 , ER4 )

NOTE: Test conditions are based on ISO 5151.

Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C

Outdoor Dry-bulb temperature 35°C

Heating: Indoor Dry-bulb temperature 20°C

Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C

1 Measured under rated operating frequency.

2 For multi system.

Specifications and rating conditions of main electric parts

Fuse (F11) T3.15AL250V

Horizontal vane motor (MV) 12 VDC

Varistor (NR11) S10K300E2K1

Terminal block (TB) 3P

SPECIFICATION

OBH555D

MSZ-SF15VA

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

NC-10

MSZ-SF20VA

Test conditions

Cooling: Dry-bulb temperature 27°C

Wet-bulb temperature 19°C

Heating: Dry-bulb temperature 20°C

INDOOR UNIT

WALL

MICROPHONE

0.8m

10 63 125 250 500 1000 2000 4000 8000

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

BAND CENTER FREQUENCIES, Hz

COOLING

FUNCTION SPL(dB(A)) LINE

Super High

FAN SPEED

HEATING

NC-10

NOISE CRITERIA CURVES

OBH555D

Unit: mm

MSZ-SF15VA MSZ-SF20VA

OUTLINES AND DIMENSIONS

11 20 Oblong hole

Installation plate

11 20 Oblong hole

Indoor unit

Wall hole 65

61 295 155 78

45 335 300

145 145

208

166

167

187

209

21.5

760

740 10

5 168

45 56 505 179

202

250

110

Installation plate

Piping

Drain hose

Air out

193

56 56

Piping

Insulation

Liquid line

Gas line

Drain hose

35 O.D

6.35-0.39m (Flared connection 6.35)

ØØ

9.52-0.34m (Flared connection 9.52)

ØØ

Insulation 28 Connected part 16 O.D

ØØ

OBH555D

MSZ-SF15VA - E1 , E2 MSZ-SF20VA - E1 , E2

WIRING DIAGRAM

MSZ-SF15VA - E4 , ER4 MSZ-SF20VA - E4 , ER4

MSZ-SF15VA - E3 , ER3 MSZ-SF20VA - E3 , ER3

OBH555D

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant pipe ø9.52

(with heat insulator)

Refrigerant pipe ø6.35

(with heat insulator)

Indoor coil

thermistor

RT12 (main)

Indoor coil

thermistor

RT13 (sub)

Refrigerant flow in cooling

Refrigerant flow in heating

Unit: mm

MSZ-SF15VA MSZ-SF20VA

REFRIGERANT SYSTEM DIAGRAM

OBH555D

8-1. 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 10-7.)

• The set time for the ON/OFF timer can be reduced to 1 second for each minute.

• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to 3

seconds. Restarting the compressor, which takes 3 minutes, cannot be reduced.

8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION

(MSZ-SF15/20VA- E1 , E2 , E3 , ER3 )

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 STOP/OPERATE (MSZ-

SF·VA- E4 , ER4 )/OPERATE/STOP (Other

models) button 2 or 3 times at first.

After modification, put back the batteries

then press the RESET button.

Table 1

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

No. 1 unit No modif cation 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 is turned OFF, or the power supply is shut down.

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

MSZ-SF15VA MSZ-SF20VA

SERVICE FUNCTIONS

J1 J2

OBH555D

8-4. 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.

Solder the jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 10-7.)

NOTE:

• The operation settings are memorized when 10 seconds has 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.

CN112

R111

Indoor electronic

control P.C. board

JR07

IC112

CN151

CN111

CN211

8-3. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT

(MSZ-SF15/20VA- E4 , ER4 )

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.

OBH555D

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