Mitsubishi Electric MSZ-DM25VA-E1 Bedienungsanleitung

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 ················12

10. TROUBLESHOOTING·······························16

11. DISASSEMBLY INSTRUCTIONS·················28

Outdoor unit service manual

MUZ-DM·VA Series (OBH751)

MXZ-DM•VA Series (OBH739)

MSZ-DM25VA

MSZ-DM35VA

INDOOR UNIT

Models

MSZ-DM25VA -E1 , ER1

MSZ-DM35VA -E1 , ER1

SERVICE MANUAL

NOTE:

RoHS compliant products have

<G> mark on the spec name plate.

No. OBH750

PARTS CATALOG (OBB750)

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.

OBH750

1TECHNICAL CHANGES

MSZ-DM25VA - E1 , ER1

MSZ-DM35VA - E1 , ER1

1. New model

OBH750

ACCESSORIES

MSZ-DM25VA MSZ-DM35VA

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 purifer ﬁlter) 1

2PART NAMES AND FUNCTIONS

Operation indicator lamp

Remote control

receiving section

Horizontal vane

Air inlet

Air ¿lter

Front panel

Air outlet Heat exchanger

Emergency operation switch

Remote controller

Air cleaning ¿lter

(Silver-ionized air

purifier filter)

Display section

OBH750

3SPECIFICATION

Indoor model MSZ-DM25VA MSZ-DM35VA

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 0.24

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

570 654

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 45

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 1,200

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 RH16A

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

OBH750

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-DM25VA

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-DM35VA

4NOISE CRITERIA CURVES

OBH750

MSZ-DM25VA MSZ-DM35VA Unit: mm

5OUTLINES AND DIMENSIONS

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

2325

799

785 7

290

12063049

103

130

100

(57°)

225 225 80.5

80.5

61.5

59.5340338

249

248 21.5

167 157

207.5

206.5

172

Air in

Installation plate

Piping

Drain hose

Air out

11×26 Oblong hole 11×20 Oblong hole

Installation plate

Indoor unit

Wall hole Ø65

132

56 18

OBH750

MSZ-DM25VA - E1 ,ER1 MSZ-DM35VA - E1 ,ER1

6WIRING DIAGRAM

OBH750

MSZ-DM25VA MSZ-DM35VA

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

OBH750

8-2. 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.

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.

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 – Cut J1 Same as at left Same as at left

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

No. 4 unit – – – Cut J1 and solder 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 been restored.

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”. Cut “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/ (OFF/

ON) button 2 or 3 times at

first.

After finish modification,

put back the batteries then

press the RESET button.

MSZ-DM25VA MSZ-DM35VA

J2 J1

8SERVICE FUNCTIONS

OBH750

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