Mitsubishi Electric MSZ-WN25VA - E1 Manuel utilisateur

CONTENTS

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

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

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

4. NOISE CRITERIA CURVES··························6

5. OUTLINES AND DIMENSIONS·····················7

6. WIRING DIAGRAM·····································8

7. REFRIGERANT SYSTEM DIAGRAM·············9

8. SERVICE FUNCTIONS······························10

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

10. TROUBLESHOOTING·······························15

11. DISASSEMBLY INSTRUCTIONS·················27

Outdoor unit service manual

MUZ-WN·VA Series (OBH765)

MSZ-WN25VA

MSZ-WN35VA

INDOOR UNIT

Models

MSZ-WN25VA -E1

MSZ-WN35VA -E1

SERVICE MANUAL

NOTE:

RoHS compliant products have

<G> mark on the spec name plate.

No. OBH764

PARTS CATALOG (OBB764)

Questo manuale d’istruzione è fornito da trovaprezzi.it. Scopri tutte le offerte per Mitsubishi

Condizionatore MSZ-WN25 o cerca il tuo prodotto tra le migliori offerte di Climatizzazione

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.

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.

OBH764

1TECHNICAL CHANGES

MSZ-WN25VA - E1

MSZ-WN35VA - E1

1. New model

OBH764

ACCESSORIES

MSZ-WN25VA MSZ-WN35VA

Installation plate 1

Installation plate ﬁxing screw 4 ×25 mm 5

Wireless remote controller 1

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

Battery (AAA) for remote controller 2

Air cleaning ﬁlter (Silver-ionized air puriﬁer ﬁlter) 1

2PART NAMES AND FUNCTIONS

Operation indicator lamp

Remote control

receiving section

Horizontal vane

Air inlet

Air ¿lter

(Air purifying filter)

Front panel

Air outlet Heat exchanger

Emergency operation switch

Remote controller

Air cleaning ¿lter

(Silver-ionized air

purifier filter)

Display section

OBH764

3SPECIFICATION

Indoor model MSZ-WN25VA MSZ-WN35VA

Power supply Single phase 230 V, 50 Hz

Breaker Capacity A 10

Electrical data

Power input 1 (Total) Cooling W710 1,020

Heating 850 975

Running current 1

(Total)

Cooling A3.6 4.8

Heating 4.1 4.7

Power factor 1 (Total) Cooling %85 92

Heating 90

Starting current 1 (Total) A 4.1 4.8

Fan motor

Model RC0J40-EF

Current 1 Cooling A0.19 0.26

Heating 0.20 0.22

Dimensions W × H × D mm 799 × 290 × 232

Weight kg 9

Special remarks

Air direction 5

Airﬂow

Cooling

Super High

m3/h

570 684

High 438 468

Med. 330 342

Low 228

Heating

Super High

m3/h

600 618

High 450

Med. 330

Low 210

Sound level

Cooling

Super High

dB(A)

43 46

High 37 38

Med. 30 31

Low 22

Heating

Super High

dB(A)

43 44

High 37

Med. 30

Low 23

Fan speed

Cooling

Super High

rpm

1,080 1,240

High 880 930

Med. 710 730

Low 550

Heating

Super High

rpm

1,120 1,150

High 900

Med. 710

Low 520

Fan speed regulator 4

Remote controller model SG17A

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.

Specifications and rated conditions of main electric parts

Fuse (F11) T3.15AL250V

Horizontal vane motor (MV) 12 VDC

Varistor (NR11) S10K300E2K1 (ERZV10D471)

Terminal block (TB) 5P

OBH764

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-WN25VA

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

Test conditions

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

Heating : Dry-bulb temperature 20°C

NC-10

MSZ-WN35VA

4NOISE CRITERIA CURVES

OBH764

MSZ-WN25VA MSZ-WN35VA Unit: mm

5OUTLINES AND DIMENSIONS

2325

799

785 7

290

12063049

103

130

100

(57°)

225 225 80.580.5

61.5 59.5340338

249

248 21.5

167 157

207.5

206.5

172

193

PIPING

INSULATION Ø35 O.D

LIQUID LINE Ø7.0 - 0.39m (FLARED CONNECTION Ø6.35)

GAS LINE Ø9.52 - 0.34m (FLARED CONNECTION Ø9.52)

DRAIN HOSE INSULATION Ø28 CONNECTED PART Ø16 O.D

AIR IN

INSTALLATION PLATE

PIPING

DRAIN HOSE

AIR OUT

11×26 OBLONG HOLE 11×20 OBLONG HOLE

INSTALLATION PLATE

INDOOR UNIT

WALL HOLE

OBH764

MSZ-WN25VA MSZ-WN35VA

6WIRING DIAGRAM

OBH764

MSZ-WN25VA MSZ-WN35VA

Indoor

heat

exchanger

Flared connection

Room temperature

thermistor

RT11

Flared connection

Refrigerant flow in cooling

Refrigerant flow in heating

Refrigerant pipe ø9.52

(with heat insulator)

Refrigerant pipe ø6.35

(with heat insulator)

Indoor coil

thermistor

RT12

Indoor coil

thermistor

RT13

Unit: mm

7REFRIGERANT SYSTEM DIAGRAM

OBH764

8-1. TIMER SHORT MODE

For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C.

board. (Refer to 10-7.)

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

shortened by bridging the timer short mode point.)

NOTE: While the relay 52C is ON, the compressor starting time cannot be shortened.

MSZ-WN25VA MSZ-WN35VA

8SERVICE FUNCTIONS

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 turned 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 the breaker from tripping 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 countermeasures 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

Indoor electronic

control P.C. board

CN10ACN111

CN151

CN112

CN110

8-3. 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 10-7.)

8-2. 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.

(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.

OBH764

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