Mitsubishi Electronics MSZ-FA25VA User Manual

and MXZ-4A80VA- E1 ,

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

No. OB371

SERVICE MANUAL

Wireless type

Models

MSZ-FA25VA - E1 (WH)

MSZ-FA35VA - E1 (WH)

CONTENTS

	1. TECHNICAL CHANGES ··············
	2. PART NAMES AND FUNCTIONS··········
	3. SPECIFICATION·················
	4. NOISE CRITERIA CURVES ············
	5. OUTLINES AND DIMENSIONS ···········
Indication of model name	6. WIRING DIAGRAM ················
MSZ-FA25VA - E1	7. REFRIGERANT SYSTEM DIAGRAM ········
MSZ-FA35VA - E1	8. SERVICE FUNCTIONS ··············
	9. TROUBLESHOOTING···············
	10. DISASSEMBLY INSTRUCTIONS··········
	11. PARTS LIST···················
	12. OPTIONAL PARTS················

NOTE:

This service manual describes technical data of the indoor units.

•As for outdoor units MUZ-FA25VA- E1 , MUZ-FA35VA- E1 , MUZ-FA25VAH- E1 and MUZ-FA35VAH- E1 , refer to service manual OB372.

•As for outdoor units MXZ-3A54VA- E1 , MXZ-4A71VA- E1 refer to service manual OB377.

1 TECHNICAL CHANGES

MSZ-A09YV	- E1	MSZ-FA25VA	- E1
MSZ-A12YV	- E1	MSZ-FA35VA	- E1

1.Indication of capacity has been changed.(BTU base kW base)

2.Controller method between indoor and outdoor has been changed.

3.Power supply method has been changed (change to supply from outdoor unit).

4.Power supply cord has been removed.

5.Indoor electronic control P.C. board has been changed.

6.Position of terminal block has been changed.

7.Indoor fan motor has been changed. ( AC DC)

8.Indoor heat exchanger has been changed.

9.The horizontal vane motor unit has been changed.

An external gear is added to the generalized stepping motor.

The unit is structured so that the driving torque and stopping torque would increase.

Generalized stepping motor

NOTE: Do not remove the vane motor from the motor unit.

Do not disassemble the horizontal vane motor unit.

10.The vertical vane motor unit has been added.

An external gear is added to the generalized stepping motor.

The unit is structured so that the driving torque and stopping torque would increase.

Generalized stepping motor

NOTE: Do not remove the vane motor from the motor unit.

Do not disassemble the vertical vane motor unit.

11. Front panel driving motor unit which opens and closes the front panel has been added.

Front panel opening/closing output gear

NOTE: Do not disassemble the front panel driving motor unit.

12.PLASMA DEODORIZING/AIR PURIFYING filter units have been added.

13.i-see Sensor has been added.

(i-see control operation and AREA setting have been added.)

14.Air cleaning filer has been removed.

15.Signal of remote controller has been changed. (It is not available for the conventional models.)

16.Symbol on terminal block has been changed (to S1/S2/S3).

2

2	PART NAMES AND FUNCTIONS
INDOOR UNIT
MSZ-FA25VA - E1
MSZ-FA35VA - E1
	PLASMA AIR PURIFYING filter		Air inlet
			Front panel
	Panel		PLASMA DEODORIZING filter
	Heat exchanger
	Anti-mold air filter		Fan guard
	Air outlet
	Vertical vane
	Horizontal vane		Remote controller
	Line flow fan
	Auto front panel	Operation section	Display section
When the unit starts operating, the
		(When the front panel is opened)
front panel opens automatically to
draw in air. When the unit stops		POWER lamp
operating, the front panel closes
automatically.		PLASMA/WASH lamp
	Auto front panel
		AREA lamp
		Emergency operation
		switch	Remote control	i-see Sensor
		WASH reset switch
	<Open> <Closed>		receiving section

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").

3

MSZ-FA25VA - E1
MSZ-FA35VA - E1				MSZ-FA25VA - E1
ACCESSORIES
				MSZ-FA35VA - E1
		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

REMOTE CONTROLLER

Signal transmitting section

Operation display section

OPERATE/STOP (ON/OFF) button

Open the front lid.

FAN SPEED CONTROL button

OPERATION SELECT button

ECONO COOL button

PLASMA button

AREA button

i-see button RESET button

Temperature buttons

Indication of remote controller model is on back

WIDE VANE button (Vertical vane button)

OFF-TIMER button

ON-TIMER button

TIME SET buttons

FORWARD button

BACKWARD button

CLOCK SET button

VANE CONTROL button (Horizontal vane button)

4

3 SPECIFICATION

Indoor model

Function

Power supply

	Air flow(Super High)		K /h
Capacity Air flow(HighW/Med.W/LowW)			K /h
	Power outlet		A
Electrical data	Running current 1		A
	Power input 1		W
	Auxiliary heater		A(kW)
	Power factor 1		%
	Fan motor current 1		A
Fan motor	Model
	Dimensions WOHOD		mm
	Weight		kg
	Air direction
	Sound level(Super High)		dB(A)
	Sound level(HighW/Med.W/LowW)		dB(A)
Special remarks	Fan speed(Super High)		rpm
	Fan speed regulator		rpm
	Fan speed(HighW/Med.W/LowW)
	Thermistor RT11(at25:)		k"
	Thermistor RT12(at25:)		k"
	Thermistor RT13(at25:)		k"
	Remote controller model

MSZ-FA25VA - E1			MSZ-FA35VA - E1
Cooling		Heating	Cooling		Heating
Single phase			Single phase
230V,50Hz			230V,50Hz
594		612	594		612
474W/354W/252W		498W/384W/264W	474W/354W/258W		498W/384W/276W
	10			10
0.25			0.25
	33			33
	—			—
	57			57
0.25			0.25
RC0J40-EB			RC0J40-EB
780O298O198			780O298O198
	10			10
	4			4
	42			42
36W/29W/21W			36W/29W/22W
1,220		1,250	1,220		1,250
1,010W/800W/610W		1,050W/850W/640W	1,010W/800W/630W		1,050W/850W/660W
	4			4
	10			10
	10			10
	10			10
KM05A			KM05A

When outdoor unit is MXZ type.

Indoor model

Function

Capacity Air flow(Super High)

Air flow(HighW/Med.W/LowW)

	Special remarks	Sound level(Super High)
		Sound level(HighW/Med.W/LowW)
		Fan speed(Super High)
		Fan speed(HighW/Med.W/LowW)

	MSZ-FA25VA - E1			MSZ-FA35VA - E1
	Cooling		Heating	Cooling		Heating
K /h	546		540	642
K /h	450W/348W/252W		420W/372W/264W	516W/390W/258W		522W/402W/276W
dB(A)		42			42
dB(A)	36W/29W/21W			36W/29W/22W
rpm	1,130		1,120	1,300
rpm	960W/790W/610W		910W/830W/640W	1,080W/860W/630W		1,090W/880W/660W

NOTE : Test conditions are based on ISO 5151
Cooling : Indoor	Dry-bulb temperature 27:Wet-bulb temperature 19:
Outdoor Dry-bulb temperature 35:Wet-bulb temperature 24:
Heating : Indoor	Dry-bulb temperature 20:Wet-bulb temperature 15:
Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6:
Refrigerant piping length (one way): 5m
w Reference value
1 Measured under rated operating frequency.
Specifications and rating conditions of main electric parts
INDOOR UNIT
Item	Model		MSZ-FA25VA - E1 MSZ-FA35VA - E1
Fuse	(F11)		T3.15AL250V
Front panel driving motor	(MP)		NSEJ001DA1 12V DC 100" (at 25˚C)
i-see Sensor motor	(MT)		MP20Z 12V DC 300" (at 25˚C)
Horizontal vane motor	(MV1)		MSBPC20M16 12V DC 250" (at 25˚C)
Vertical vane motor	(MV2)		MSBPC20M11 12V DC 300" (at 25˚C)
Varistor	(NR11)		ERZV14D471
i-see Sensor	(RR)		A2TPMI334F0V50HSOBA060P5L1J4S 5V DC
Terminal block	(TB)		3P
			5

4 NOISE CRITERIA CURVES

MSZ-FA25VA - E1

FAN SPEED FUNCTION SPL(dB(A))

LINE

COOLING 42

Super High

HEATING 42

Test conditions,

	Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
	Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
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	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

MSZ-FA35VA - E1

FAN SPEED FUNCTION	SPL(dB(A))	LINE
COOLING	42
Super High	42
HEATING

Test conditions,

Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19: Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:

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	APPROXIMATE
OCTAVE
		THRESHOLD OF
		HEARING FOR							NC-20
		CONTINUOUS
	10	NOISE
		63	125	250	500	1000	2000	4000	8000

BAND CENTER FREQUENCIES, Hz

INDOORUNIT

WALL

1m

0.8m

MICROPHONE

6

5 OUTLINES AND DIMENSIONS

MSZ-FA25VA - E1	Unit : mm
MSZ-FA35VA - E1

INDOOR UNIT		11o26 Oblong hole		11o20 Oblong hole
		Installation plate	55	225		225		55		14
	780	215						214	234	273.5	287.5
		41.5		155		155			42.5		3
			55	335		320		70
		Indoor unit		Air in				Wall hole		[65
			more	198	5	Installation plate
							{	Liquid line [6.35 - 0.5m
			7 or					Gas line [9.52 - 0.43m
298								Insulation [35 O.D
									[19 I.D
			100					Drain hose [16
								(Connected part O.D)
53.5	624.5	102		90				Insulation [28
				106
58		19
			Air out

159	moreor55w	leftleft,ofcaseInwback, or (usingpipingunderleft spacer), moreor113
moreor10
Required space (Indoor unit)
Wireless remote controller	75 or more
75 or more

7

6 WIRING DIAGRAM

MSZ-FA25VA	- E1
MSZ-FA35VA	- E1	MODELS WIRING DIAGRAM

INDOOR UNIT

INDOOR ELECTRONIC

4

RT13

TB

BLK

TAB3

F11

CONTROL P.C. BOARD

CN

3

230V~

S1

112

2

RT12

S2

DB111

1

TO OUTDOOR

BLU

T111

2

CN

UNIT

12-24V

S3

RED

NR11

RT11

111

CONNECTING

1

RED

1

CN201

2

BLK

5

MF

3

WHT

4

YLW

LD104

5

BLU

CN

CN

LD

LD

CN

CN

CN

CN

6

GRN

CN211

151

1R1

101(A)

105(T)

110

1T1

1T2

1U1

5

5

2

8

3

5

4

3

3

2

5

INTERLOCK

SW P.C.

PLASMA_A PLASMA_D

MP

SWITCH(FAN)

BOARD

	MV1 MV2		POWER MONITOR		MT RR	SAFETY DEVICE
			RECEIVER P.C. BOARD			(PLASMA UNIT)
SYMBOL	NAME		SYMBOL		NAME		SYMBOL		NAME
DB111	DIODE STACK		MV2	VANE MOTOR (VERTICAL)				RT12	INDOOR COIL THERMISTOR (MAIN)
F11	FUSE (T3.15AL250V)		NR11	VARISTOR				RT13	INDOOR COIL THERMISTOR (SUB)
MF	INDOOR FAN MOTOR		PLASMA_A	PLASMA AIR PURIFYING FILTER UNIT				T111	TRANSFORMER
MP	FRONT PANEL DRIVING MOTOR		PLASMA_D	PLASMA DEODORIZING FILTER UNIT				TB	TERMINAL BLOCK
MT	i-see Sensor MOTOR		RR	i-see Sensor
MV1	VANE MOTOR (HORIZONTAL)		RT11	ROOM TEMPERATURE THERMISTOR

NOTE:1. About the outdoor side electric wiring refer to the outdoor unit electric wiring diagram for servicing.

2.Use copper conductors only. (For field wiring)

3.Symbols below indicate.

/: Terminal block, : Connector

7 REFRIGERANT SYSTEM DIAGRAM

MSZ-FA25VA - E1		MSZ-FA35VA - E1	Unit : mm
INDOOR UNIT	Refrigerant pipe [9.52	INDOOR UNIT	Refrigerant pipe [9.52
	(with heat insulator)		(with heat insulator)

	Indoor	Indoor coil		Indoor	Indoor coil
		thermistor			thermistor
	heat	RT12(main)		heat	RT12(main)
	exchanger		Flared connection	exchanger
					Flared connection

Indoor coil

Indoor coil

thermistor

thermistor

RT13(sub)

RT13(sub)

Room temperature

Room temperature

thermistor

thermistor

RT11

RT11

Flared connection

Flared connection

Refrigerant flow in cooling

Refrigerant pipe [6.35

Refrigerant pipe [6.35

(with heat insulator)

(with heat insulator)

Refrigerant flow in heating

8

8 SERVICE FUNCTIONS

MSZ-FA25VA - E1

MSZ-FA35VA - E1

8-1. TIMER SHORT MODE

For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board. The time will be shortened as follows. (Refer to 9-7.)

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 :

Remote controller model : KM05A

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

After finish remodelling, 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 will only accepts 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 has turned off, or the power supply has shut down. Please conduct the above setting once again after the power has restored.

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. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure. Then, the unit will restart automatically.

Operation

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

2After 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.)

9

How to release “AUT O 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 9-7.)

CN130

IC156

JR07

CN212 CN151 CN1T2 CN1T1 CN112 CN1R1 CN211

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 works 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.

Side 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 TROUBLESHOOTING

MSZ-FA25VA - E1

MSZ-FA35VA - E1

9-1. Cautions on troubleshooting

1.Before troubleshooting, check the following:

1)Check the power supply voltage.

2)Check the indoor/outdoor connecting wire for mis-wiring.

2.Take care the following during servicing.

1)Before servicing the air conditioner, be sure to turn off the unit first with the remote controller, and then after confirming the horizontal vane is closed, turn off the breaker and / or disconnect the power plug.

2)Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board.

3)When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components.

4)When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.

Lead wiring

Housing point

3.Troubleshooting procedure

1)First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work.

2)Before servicing check that the connector and terminal are connected properly.

3)If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration.

4)When troubleshooting, refer to 9-2., 9-3. and 9-4.

4.How to replace batteries

Weak batteries may cause the remote controller malfunction.

In this case, replace the batteries to operate the remote controller normally.

1Remove the front lid and insert batteries. Then reattach the front lid.

2Press RESET button with tip end of ball point pen or the like, and then use the remote controller.

Insert the negative pole of the

batteries first. Check if the polarity RESET button of the batteries are correct.

NOTE : 1. If RESET button is not pressed, the remote controller may not operate correctly.

2.This remote controller has a circuit to automatically reset the microcomputer when batteries are replaced. This function is equipped to prevent the microcomputer from malfunctioning due to the voltage drop caused by the battery replacement.

5.How to install the horizontal vane

If horizontal vane is not installed correctly, All of the operation indicator lamps will blink.

In this case, install the horizontal vane correctly by following the procedures 1 to 2.

NOTE: Before installation of the horizontal vane, turn OFF the power supply.

1	2	Stopper
Left		In procedure 2 lock the
		stoppers until they click
		into place.
		Lock.
Insert this end first.

11

6. How to remove and install PLASMA DEODORIZING / AIR PURIFYING filter units

If PLASMA/WASH lamp on the indoor unit blinks, clean the filters as soon as possible. The lamp will start blinking when accumulated operating time exceeds 330 hours.

<Remove>

(1)Switch the indoor unit OFF with the remote controller and disconnect the power supply plug and/ or turn OFF the breaker.

NOTE: Otherwise, you may get injured since PLASMA DEODORIZING/AIR PURIFYING filter units are charged with high voltage.

(2)Hold the knobs on both sides of the front panel and lift the panel up until its level.

(3)Remove the anti-mold air filter.(See Figure 1.)

(4)Remove PLASMA DEODORIZING/AIR PURIFYING filter units. (See Figure 2.)

Figure 1.

Figure 2.

<Install>

Install PLASMA DEODORIZING/AIR PURIFYING filter units by following the removal procedure in reverse.

(1)Insert the top of PLASMA DEODORIZING/AIR PURIFYING filter units into the aperture in the plasma element holder.

(See Figure 3.)

(2)Push in PLASMA DEODORIZING/AIR PURIFYING filter units until they click into place.

•The front panel does not close if PLASMA DEODORIZING/AIR PURIFYING filter units are not installed properly.

(3)Install the anti-mold air filter.

(4)Connect the power supply plug and/ or turn ON the breaker.

(5)Press WASH reset switch. A short “beep” is heard and the blinks of PLASMA/WASH lamp will be cancelled. Make sure PLASMA/ WASH lamp is not blinking at the start of operation next time.

(See Figure 4.)

(6)Hold both sides of the front panel and close the front panel.

(7)Press the 3 positions on the front panel as indicated by the arrows.(See Figure 5.)

NOTE:

Install PLASMA DEODORIZING/AIR PURIFYING filter units only when they are completely dry. If the filter unit remains wet, PLASMA/WASH lamp may blink and the plasma function may be disabled.(When PLASMA DEODORIZING/AIR PURIFYING filter units are cleaned.)

Figure 3.

Figure 4.

Plasma element holder

E.O.

SW

WASH reset

Figure 5.

12