Mitsubishi Electronics MSZ-FD35VAS, MSZ-FD35VA, MSZ-FD25VA User Manual

4 (1)

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

INDOOR UNIT

No. OBH488

SERVICE MANUAL

Wireless type

Models

MSZ-FD25VA - E1

MSZ-FD25VAS - E1

MSZ-FD35VA - E1

MSZ-FD35VAS - E1

Outdoor unit service manual

MUZ-FD·VA Series(OBH489)

MXZ-A·VA Series (OB377)

MXZ-8A140A (OC316)

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 ············································7

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

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

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

10. TROUBLESHOOTING······································20

11. DISASSEMBLY INSTRUCTIONS·····················36

PARTS CATALOG (OBB488)

NOTE:

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

2

1 TECHNICAL CHANGES

MSZ-FD25VA - E1 MSZ-FD25VAS - E1 MSZ-FD35VA - E1 MSZ-FD35VAS - E1

1. New model

3

2 PART NAMES AND FUNCTIONS

MSZ-FD25VA

MSZ-FD25VAS

MSZ-FD35VA

MSZ-FD35VAS

AREA lamp

POWER lamp

CLEAN lamp

PLASMA lamp

Operation Indicator

Remote control

 

lamp

receiving section

 

Front panel

 

 

 

Air filter

 

 

 

Air inlet

 

 

 

 

 

 

Remote controller

Plasma anti-allergy

 

 

 

enzyme filter

 

 

 

Plasma electrode

 

 

 

unit

 

 

 

Plasma deodorizing

 

 

 

filter

 

 

 

 

i-see sensor

 

Air outlet

 

 

 

Fan guard

 

 

 

Fan

Heat exchanger

Emergency operation

Horizontal vane

 

 

switch

 

 

 

 

Vertical vane

 

 

AREA lamp indicate 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").

ACCESSORIES

1

Installation plate

1

 

 

 

2

Installation plate fixing screw 4 o 25 mm

5

 

 

 

3

Remote controller holder

1

 

 

 

4

Fixing screw for 3 3.5 o 1.6 mm (Black)

2

 

 

 

5

Battery (AAA) for remote controller

2

 

 

 

6

Wireless remote controller

1

7

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

1

4

3 SPECIFICATION

Indoor model

MSZ-FD25VA

MSZ-FD25VAS

MSZ-FD35VA

MSZ-FD35VAS

Power supply

Single phase 230 V, 50 Hz

Electrical data

Special remarks

Power input 1

Cooling

W

26

 

 

28

 

 

 

Heating

31

 

 

33

 

 

 

 

 

 

 

Running current 1

Cooling

A

0.25

 

 

0.27

 

 

 

Heating

0.30

 

 

0.32

 

 

 

 

 

 

 

Fan motor current 1

 

Cooling

A

0.25

 

 

0.27

 

 

 

Heating

0.30

 

 

0.32

 

 

 

 

 

 

 

Fan motor model

 

 

 

 

 

RCOJ40-GF

 

Dimensions WOHOD

mm

 

 

798O295O257

 

Weight

 

kg

 

 

 

12

 

 

Color

 

 

PURE WHITE

 

SILVER

 

PURE WHITE

 

SILVER

Air direction

 

 

 

 

 

4

 

 

Air flow

Cooling

K /h

 

 

 

672

 

 

(Super High)

Heating

726

 

750

 

 

 

 

Air flow

Cooling

K /h

 

 

 

516/378/276

 

 

(High/Med./Low)

Heating

552/402/270

 

552/402/282

 

 

 

 

Sound level

Cooling

dB(A)

42

 

43

 

(Super High)

Heating

 

 

 

 

 

 

 

 

 

 

Sound level

Cooling

dB(A)

36/29/20

 

36/29/21

 

(High/Med./Low)

Heating

 

 

 

 

 

 

 

 

 

 

Fan speed

Cooling

rpm

 

 

 

1,190

 

 

(Super High)

Heating

1,270

 

 

1,300

 

 

 

 

 

Fan speed

Cooling

rpm

 

 

 

950/740/580

 

 

(High/Med./Low)

Heating

1,010/780/570

1,010/780/590

 

Fan speed regulator

 

 

 

 

4

 

 

Remote controller model

 

 

 

 

KM08A

 

NOTE : Test conditions are based on ISO 5151

 

Cooling : Indoor

Dry-bulb temperature 27 :

Wet-bulb temperature 19 :

Outdoor Dry-bulb temperature 35 :

 

Heating : Indoor

Dry-bulb temperature 20 :

 

Outdoor Dry-bulb temperature 7 :

Wet-bulb temperature 6 :

Refrigerant piping length (one way): 5 m

 

1 Measured under rated operating frequency.

 

Specifications and rating conditions of main electric parts

 

 

 

 

Fuse

(F11)

 

250 V 3.15 A

 

 

 

 

i-see Sensor motor

(MT)

 

MP20Z 12 VDC 300 " (at 25 ˚C)

Horizontal vane motor

(MV1)

 

MSFBC20C29 12 VDC 350 " (at 25 ˚C)

Vertical vane motor

(MV2)

 

MSBPC20M11 12 VDC 300 " (at 25 ˚C)

Varistor

(NR11)

 

S10K320E3K1

 

 

 

 

i-see Sensor

(RR)

 

A2TPMI 23A FOV50 OBA060 P8L1 J4S

 

 

 

 

Terminal block

(TB)

 

3P

 

 

 

 

5

4 NOISE CRITERIA CURVES

MSZ-FD25VA

MSZ-FD25VAS

FAN SPEED FUNCTION SPL(dB(A))

LINE

 

 

Super High

COOLING

42

 

 

 

 

 

 

 

 

 

 

 

 

HEATING

43

 

 

BAR

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MICRO

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.0002

70

 

 

 

 

 

 

NC-70

 

 

 

 

 

 

 

dB re

60

 

 

 

 

 

 

 

LEVEL,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-60

50

 

 

 

 

 

 

 

PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-50

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-40

SOUND

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

BAND

 

 

 

 

 

 

 

NC-30

20

 

 

 

 

 

 

 

OCTAVE

 

 

 

 

 

 

 

 

 

 

 

NC-10

 

NC-20

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

125

250

500

1000

2000

4000

8000

 

63

BAND CENTER FREQUENCIES, Hz

MSZ-FD35VA

MSZ-FD35VAS

FAN SPEED FUNCTION SPL(dB(A))

LINE

 

 

Super High

COOLING

43

 

 

 

 

 

 

 

 

 

 

 

 

HEATING

43

 

 

BAR

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MICRO

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.0002

70

 

 

 

 

 

 

NC-70

 

 

 

 

 

 

 

dB re

60

 

 

 

 

 

 

 

LEVEL,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-60

50

 

 

 

 

 

 

 

PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-50

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-40

SOUND

 

 

 

 

 

 

 

30

 

 

 

 

 

 

 

BAND

 

 

 

 

 

 

 

NC-30

20

 

 

 

 

 

 

 

OCTAVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NC-20

 

 

 

 

NC-10

 

 

10

 

 

 

 

 

 

 

 

125

250

500

1000

2000

4000

8000

 

63

BAND CENTER FREQUENCIES, Hz

Test conditions

Cooling : Dry-bulb temperature 27 : Wet-bulb temperature 19 : Heating : Dry-bulb temperature 20 :

INDOOR UNIT

WALL

1 m

0.8 m

MICROPHONE

6

Mitsubishi Electronics MSZ-FD35VAS, MSZ-FD35VA, MSZ-FD25VA User Manual

5 OUTLINES AND DIMENSIONS

MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS

69

43

11 X 26 Oblong hole

 

Installation plate

64

225

225

 

 

 

798

 

 

 

 

 

785

6.5

 

 

 

 

 

254

212.5

 

 

 

 

47

 

 

 

 

 

 

41

 

155

155

 

Indoor unit

54

345

330

Air in

 

 

Installation plate

257

5

 

Piping

295

56

7

 

55

688

55

100

43

Drain hose

 

 

 

 

 

85

 

58

19

 

 

97

 

 

 

 

 

Air out

Unit : mm

11 X 20 Oblong hole

64

21.5

 

 

 

211.5

231.5

253

3

 

42

69

 

 

Wall hole [65

159 Piping

Insulation

Liquid line

Gas line

Drain hose

[35 O.D

[6.35 - 0.5 m (Flared connection [6.35)

[9.52 - 0.43 m (Flared connection [9.52)

Insulation [28 O.D Connected part [16 O.D

6 WIRING DIAGRAM

MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS

7

7 REFRIGERANT SYSTEM DIAGRAM

MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS

Unit : mm

 

 

Refrigerant pipe [9.52

 

 

(with heat insulator)

Indoor

Indoor coil

 

thermistor

 

heat

 

RT12 (main)

 

exchanger

Flared connection

Indoor coil thermistor RT13 (sub)

Room temperature thermistor

RT11

Flared connection

Refrigerant pipe [6.35 (with heat insulator)

Refrigerant flow in cooling

Refrigerant flow in heating

8

8 SERVICE FUNCTIONS

MSZ-FD25VA

MSZ-FD25VAS

MSZ-FD35VA

MSZ-FD35VAS

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board. The time will be shortened as follows. (Refer to 10-7.)

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.)

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.

How to modify the remote controller P.C. board

Remove batteries before modification.

The board has a print as shown below :

NOTE : For modification, take out the batteries and press the OPERATE/STOP(ON/OFF) button twice or 3 times at first.

After modification, put back the batteries then press

the RESET button.

J1 J2

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.

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 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.

9

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

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

2 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 release “AUTO RESTART FUNCTION”

1Turn OFF the main power for the unit.

2Solder the Jumper wire to JR07 on the indoor electronic control P.C. board. (Refer to 10-7.)

CN130

IC156

CN212 CN1R1 CN211

JR07

CN1U1 CN151 CN1T1 CN112

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 cancelled.

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.

8-4. REMOTE CONTROLLER

Be sure to set the slide switch inside the remote controller to an appropriate position in accordance with the installed position of the indoor unit. If the switch is not set correctly, the air conditioner may not function properly.

Slide swich

Where is the indoor unit installed in your room?

Area

Left

Center

Right

Position of

 

 

 

the slide

 

 

 

switch

 

 

 

Display on

 

 

 

the remote

 

 

 

controller

 

 

 

Installed at left, if the

Installed at right, if the

distance is not more

distance is not more

than 50 cm.

than 50 cm.

(Left)

(Center)

(Right)

Is the indoor unit installed at right, left or center?

NOTE:If the indoor unit is installed more than 50 cm away from the side walls, cabinets or other nearby objects, set the slide switch to the “center” position.

10

9 MICROPROCESSOR CONTROL

MSZ-FD25VA

MSZ-FD25VAS

MSZ-FD35VA

MSZ-FD35VAS

WIRELESS REMOTE CONTROLLER

Signal transmitting section

Operation display section

 

 

OPERATE/STOP

FAN SPEED CONTROL button

VANE CONTROL button

(ON/OFF) button

OPERATION SELECT button

OFF TIMER button

 

 

ECONO COOL button

ON TIMER button

Temperature buttons

PLASMA button

TIME SET buttons

 

FORWARD button

 

CLEAN button

BACKWARD button

 

i-see button

WIDE VANE button

(Vertical vane button)

AREA button

CLOCK SET button

RESET button

Indication of remote controller model is on back

NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the remote controller with beeps.

INDOOR UNIT LAMP

The lamps at the center of the indoor unit indicates the operation state.

Lamp

Operation state

AREA

Refer to 9-7.

POWER

Lamp lights during operation.

Lamp blinks in abnormal condition.

 

 

 

CLEAN

Lamp lights during clean operation.

Refer to 9-9.

 

PLASMA

Lamp lights during PLASMA operation.

Refer to 9-8.

 

11

9-1. COOL ( ) OPERATION

(1)Press OPERATE/STOP(ON/OFF) button.

POWER lamp of the indoor unit turns on with a beep tone.

(2)Select COOL mode with OPERATION SELECT button.

(3)Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 16 ~ 31 °C.

1. Coil frost prevention

The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil from frosting.

When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.

The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor heat exchanger rises.

2.Low outside temperature operation

When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.

9-2. DRY ( ) OPERATION

(1)Press OPERATE/STOP(ON/OFF) button.

POWER lamp of the indoor unit turns on with a beep tone.

(2)Select DRY mode with OPERATION SELECT button.

(3)The set temperature is determined from the initial room temperature.

1.Coil frost prevention

Coil frost prevention is as same as COOL mode. (9-1.1.)

2.Low outside temperature operation

Low outside temperature operation is as same as COOL mode. (9-1.2.)

9-3. HEAT ( ) OPERATION

(1)Press OPERATE/STOP(ON/OFF) button.

POWER lamp of the indoor unit turns on with a beep tone.

(2)Select HEAT mode with OPERATION SELECT button.

(3)Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 16 ~ 31 °C.

1.Cold air prevention control

When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room temperature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.

2.High pressure protection

The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the condensing pressure from increasing excessively.

When the temperature of indoor heat exchanger becomes too high, the high pressure protection works.

The indoor fan operates following the cold air prevention control. This mode continues until the temperature of indoor heat exchanger falls.

3.Defrosting

Defrosting starts when the temperature of outdoor heat exchanger becomes too low.

The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses, and the compressor re-starts. This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.

9-4. AUTO CHANGE OVER ··· AUTO MODE OPERATION

Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation.

Mode selection

(1)Initial mode

When unit starts the operation with AUTO operation from off;

If the room temperature is higher than the set temperature, operation starts in COOL mode.

If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode.

(2)Mode change

COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 2 °C below the set temperature.

HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2 °C above the set temperature.

NOTE 1

If two or more indoor units are operating in multi system, there might be a case that the indoor unit, which is operating in (AUTO), cannot change over to the other operating mode (COOL HEAT) and becomes a state of standby. Refer to NOTE 2 “FOR MULTI SYSTEM AIR CONDITIONER”.

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