Mitsubishi MSZ-FA25VA - E1, MSZ-FA25VA - E2, MSZ-FA25VA - E3, MSZ-FA35VA - E1, MSZ-FA35VA - E2 Service Manual
...
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
INDOOR UNIT
SERVICE MANUAL
Wireless type
Models
Revision:B
E3
● model has been added.
● 9-2. Failure mode recall function has been
changed.
● RoHS PARTS LIST has been added.
Please void OB371 REVISED EDITION-A.
No. OB371
REVISED EDITION-B
MSZ-FA25VA MSZ-FA25VA MSZ-FA25VA MSZ-FA35VA MSZ-FA35VA MSZ-FA35VA -
E1
E2
E3
E1
E2
E3
Outdoor unit service manual
MUZ-FA·VA(H) Series (OB372)
MXZ-A·VA Series (OB377)
MXZ-8A140VA1 (OC316)
CONTENTS
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················3
3. SPECIFICATION·················································5
4. NOISE CRITERIA CURVES·······························6
5. OUTLINES AND DIMENSIONS·························7
6. WIRING DIAGRAM ············································8
7. REFRIGERANT SYSTEM DIAGRAM················8
8. SERVICE FUNCTIONS ······································9
9. TROUBLESHOOTING ······································11
10. DISASSEMBLY INSTRUCTIONS·····················31
11. PARTS LIST······················································35
12. RoHS PARTS LIST···········································39
13. OPTIONAL PARTS ···········································42
NOTE:
This service manual describes technical data of the indoor units.
RoHS compliant products have <G> mark on the spec name plate.
For servicing of RoHS compliant products, refer to the RoHS Parts List.
Revision:A
E2
• model has been added.
Color of BOX and CORNER BOX has been changed to white.
Revision:B
E3
• model has been added.
•9-2. Failure mode recall function has been changed.
•RoHS PARTS LIST has been added.
1
MSZ-A09YV - ➔ MSZ-FA25VA MSZ-A12YV - ➔ MSZ-FA35VA -
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.
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.
TECHNICAL CHANGES
E1E1
E1E1
NOTE: Do not remove the vane motor from the motor unit.
Do not disassemble the horizontal vane motor unit.
Generalized stepping motor
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 AREAsetting 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
Line flow fan
Air outlet
Vertical vane
Air inlet
Display section
Front panel
PLASMA DEODORIZING filter
Panel
Heat exchanger
Horizontal vane
Operation section
(When the front panel is opened)
Remote controller
POWER lamp
Remote control
receiving section
PLASMA AIR PURIFYING filter
Anti-mold air filter
Fan guard
i-see Sensor
PLASMA/WASH lamp
AREA lamp
Emergency operation
switch
WASH reset switch
Auto front panel
When the unit starts operating, the
front panel opens automatically to
draw in air. When the unit stops
operating, the front panel closes
automatically.
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").
<Open> <Closed>
Auto front panel
MSZ-FA25VA- ➔ MSZ-FA25VAMSZ-FA35VA- ➔ MSZ-FA35VA-
1. Color of BOX and CORNER BOX has been changed to white.
E2E1
E2E1
MSZ-FA25VA- ➔ MSZ-FA25VAMSZ-FA35VA- ➔ MSZ-FA35VA-
1. The operation of thermo-off-unit has been changed. (When 2 or more indoor units are connected with a multi type outdoor
unit, and operated in heat mode.)
E2E1
< , > Indoor fan operates with very Low speed or stops.
E3
< > Indoor fan operates intermittently with very Low speed or stops.
2
PART NAMES AND FUNCTIONS
E3E2
E3E2
MSZ-FA25VA
MSZ-FA35VA
3
1
2
3
4
5
6
7
Installation plate
Installation plate fixing screw 4 o 25 mm
Remote controller holder
Fixing screw for 3 3.5 o 1.6 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
1
5
1
2
2
1
1
ON-TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
VANE CONTROL button
(Horizontal vane button)
OFF-TIMER button
i-see button
(This diagram shows an overall view.)
Open the front lid.
PLASMA button
AREA button
RESET button
WIDE VANE button
(Vertical vane button)
Signal transmitting section
Operation display section
Temperature buttons
OPERATE/STOP
(ON/OFF) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
Indication of
remote controller
model is on back
MSZ-FA25VA
MSZ-FA35VA
ACCESSORIES
REMOTE CONTROLLER
4
3
T3.15AL250V
NSEJ001DA1 12V DC 100" (at 25˚C)
MP20Z 12V DC 300" (at 25˚C)
MSBPC20M16 12V DC 250" (at 25˚C)
MSBPC20M11 12V DC 300" (at 25˚C)
ERZV14D471
A2TPMI334F0V50HSOBA060P5L1J4S 5V DC
3P
Item
Fuse
Front panel driving motor
i-see Sensor motor
Horizontal vane motor
Vertical vane motor
Varistor
i-see Sensor
Terminal block
(F11)
(MP)
(MT)
(MV1)
(MV2)
(NR11)
(RR)
(TB)
MSZ-FA25VA
MSZ-FA35VA
Indoor model
Function
Power supply
Single phase
230V,50Hz
10
0.25
33
57
0.25
RC0J40-EB or RC0J30-CC
780O298O198
10
4
42
36/29/21
4
KM05A
Cooling
594
474/354/252
1,220
1,010/800/610
Heating
612
498/384/264
1,250
1,050/850/640
Single phase
230V,50Hz
10
0.25
33
57
0.25
RC0J40-EB or RC0J30-CC
780O298O198
10
4
42
36/29/22
4
KM05A
Cooling
594
474/354/258
1,220
1,010/800/630
Heating
612
498/384/276
1,250
1,050/850/660
Air flow(Super High)
Air flow(High/Med./Low)
Power outlet
Running current ✽1
Power input ✽1
Power factor ✽1
Fan motor current ✽1
Model
Dimensions WOHOD
Weight
Air direction
Sound level(Super High)
Sound level(High/Med./Low)
Fan speed(Super High)
Fan speed(High/Med./Low)
Fan speed regulator
Remote controller model
K /h
K /h
A
A
W
%
A
mm
kg
dB(A)
dB(A)
rpm
rpm
Electrical
data
Fan motor
Special
remarks
Capacity
MSZ-FA25VA
MSZ-FA35VA
Indoor model
Function
Cooling
546
450/348/252
1,130
960/790/610
Heating
540
420/372/264
1,120
910/830/640
Cooling
516/390/258
1,080/860/630
Heating
522/402/276
1,090/880/660
Air flow(Super High)
Air flow(High/Med./Low)
Sound level(Super High)
Sound level(High/Med./Low)
Fan speed(Super High)
Fan speed(High/Med./Low)
K /h
K /h
dB(A)
dB(A)
rpm
rpm
Special
remarks
Capacity
42
36/29/21
642
42
36/29/22
1,300
SPECIFICATION
When outdoor unit is MXZ-8A140VA
NOTE : Test conditions are based on ISO 5151
Specifications and rating conditions of main electric parts
1 type.
Cooling : Indoor Dry-bulb temperature 27:Wet-bulb temperature 19:
Heating : Indoor Dry-bulb temperature 20:Wet-bulb temperature 15:
Refrigerant piping length (one way): 5m
Outdoor Dry-bulb temperature 35:Wet-bulb temperature 24:
Outdoor Dry-bulb temperature 7: Wet-bulb temperature 6:
✽1 Measured under rated operating frequency.
5
4
90
80
70
60
50
40
30
20
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
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
42
42
SPL(dB(A))
LINE
Super High
FAN SPEED
HEATING
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
INDOORUNIT
WALL
MICROPHONE
0.8m
1m
90
80
70
60
50
40
30
20
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
Test conditions,
Cooling : Dry-bulb temperature 27: Wet-bulb temperature 19:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
COOLING
FUNCTION
42
42
SPL(dB(A))
LINE
Super High
FAN SPEED
HEATING
Heating : Dry-bulb temperature 20: Wet-bulb temperature 15:
NOISE CRITERIA CURVES
MSZ-FA25VA
MSZ-FA35VA
6
5
780
155 155
335 320
41.5 215
42.5
214
3 287.5
7055
5555 225 225
298
90
106
or more7
100
198 5
53.5 102624.5
19
159
58
234
14273.5
Air in
Air out
Wall hole
[65
Indoor unit
Installation plate
Installation plate
11o20 Oblong hole
11o26 Oblong hole
10 or more
75 or more
55 or morew
75 or more
wIn case of left, left back, or
left under piping (using spacer),
113 or more
Insulation [28
Drain hose [16
(Connected part O.D)
Liquid line [6.35 - 0.5m
Gas line [9.52 - 0.43m
Insulation [35 O.D
[19 I.D
{
Required space (Indoor unit)
Wireless remote controller
OUTLINES AND DIMENSIONS
MSZ-FA25VA
MSZ-FA35VA
Unit : mm
7
6
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant flow in cooling
Refrigerant flow in heating
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe [6.35
(with heat insulator)
Indoor coil
thermistor
RT12(main)
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Indoor coil
thermistor
RT13(sub)
Flared connection
Refrigerant pipe [9.52
(with heat insulator)
Refrigerant pipe [6.35
(with heat insulator)
Indoor coil
thermistor
RT12(main)
SYMBOL
DB111
F11
MF
MP
MT
MV1
SYMBOL
MV2
NR11
PLASMA_A
PLASMA_D
RR
RT11
SYMBOL
RT12
RT13
T111
TB
NAME
DIODE STACK
FUSE (T3.15AL250V)
INDOOR FAN MOTOR
FRONT PANEL DRIVING MOTOR
i-see Sensor MOTOR
VANE MOTOR (HORIZONTAL)
NAME
VANE MOTOR (VERTICAL)
VARISTOR
PLASMA AIR PURIFYING FILTER UNIT
PLASMA DEODORIZING FILTER UNIT
i-see Sensor
ROOM TEMPERATURE THERMIST OR
NAME
INDOOR COIL THERMISTOR (MAIN)
INDOOR COIL THERMISTOR (SUB)
TRANSFORMER
TERMINAL BLOCK
1
2
3
4
S2
8
230V~
BLU
INDOOR ELECTRONIC
CONTROL P.C. BOARD
33
PLASMA_DPLASMA_A
SAFETY DEVICE
(PLASMA UNIT)
MP
RR
5
4
MT
SW P.C.
BOARD
POWER MONITOR
RECEIVER P.C. BOARD
INTERLOCK
SWITCH(FAN)
5
5
MV2
MV1
TO OUTDOOR
UNIT
CONNECTING
BLK
RED
S3
TB
TAB3
DB111
NR11
F11
5
6
4
2
5
CN
1U1
2
CN
1T2
CN
1T1
CN
110
3
LD
105(T)
LD
101(A)
12-24V
RT13
2
1R1
CN
GRN
LD104
CN201
2
1
151
CN
T111
RED
WHT
111
CN
CN
112
CN211
BLU
YLW
BLK
MF
RT11
RT12
1
3
5
S1
WIRING DIAGRAM
MSZ-FA25VA
MSZ-FA35VA
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
MSZ-FA25VA
REFRIGERANT SYSTEM DIAGRAM
MSZ-FA35VA
8
Unit : mm
8
No. 1 unit
No. 2 unit
No. 3 unit
No. 4 unit
1 unit operation
No modification
–
–
–
2 units operation
Same as at left
Solder J1
–
–
3 units operation
Same as at left
Same as at left
Solder J2
–
4 units operation
Same as at left
Same as at left
Same as at left
Solder both J1 and J2
SERVICE FUNCTIONS
MSZ-FA25VA
MSZ-FA35VA
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 :
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
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.
J2
Table 1
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 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.
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.)
9
How to release “AUTO RESTART FUNCTION”
JR07
CN151 CN211CN112 CN1R1
CN212
CN1T1CN1T2
CN130
IC156
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.
Area Left Center Right
Position of
the slide
switch
Display on
the remote
controller
Where is the indoor unit installed in your room?
Installed at left , if the
distance is not more
than 50 cm.
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.
Installed at right, if the
distance is not more
than 50 cm.
Is the indoor unit installed at right, left or
center?
(Left) (Center) (Right)
Side swich
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.)
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.
10
21
Stopper
Lock.
Left
Insert this end first.
9
RESET button
Housing point
TROUBLESHOOTING
MSZ-FA25VA
MSZ-FA35VA
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 main 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.
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.
1 Remove the front lid and insert batteries.
Then reattach the front lid.
Insert the negative pole of the
batteries first. Check if the polarity
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.
Lead wiring
2 Press RESET button with tip end of ball point pen
or the like, and then use the remote controller.
NOTE: Before installation of the horizontal vane, turn OFF the power supply.
11
22
In procedure
stoppers until they click
into place.
lock the
WASH
reset
E.O.
SW
Plasma
element
holder
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>
Figure 1.
(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 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.
Figure 3.
(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.
Figure 4.
(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.)
12
Figure 5.
INFORMATION FOR MULTI SYSTEM AIR CONDITIONER
Lighted
Blinking
Not lighted
OUTDOOR UNIT : MXZ series
Multi system air conditioner can connect two or more indoor units with one outdoor unit.
•Unit won’t operate in case the total capacity of indoor units exceeds the capacity of outdoor units. Do not
connect indoor units beyond the outdoor unit capacity.
Operation indicator lamp flashes as shown in the figure below.
•When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and
the other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor
units which start the operation later cannot operate, indicating as shown in the figure below. In this case,
please set all the indoor units to the same operation mode.
•When indoor units start the operation while the defrosting of outdoor unit is being done, it takes a few minutes
(max. 10 minutes) to blow out the warm air.
•In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant
flowing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.
13
9-2. Failure mode recall function
Operational procedure
Yes
(Blinks)
No
(OFF)
Yes
No
Releasing the failure mode recall function
W1. Regardless of normal or abnormal, a short
beep is emitted once as the signal is received.
Note1.Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly.
2.If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.
W2. Blinking pattern when the indoor unit is abnormal:
W3.Blinking pattern when the outdoor unit is abnormal:
ON
OFF
Beeps
Repeated cycle Repeated cycle
ON
OFF
No beep Beeps
Repeated cycle
2.5-second OFF
Blinking at 0.5-
second interval
2.5-second OFF 3-second ON
Blinking at 0.5-
second interval
Beeps
Repeated cycle
2.5-second OFF
Blinking at 0.5second interval
No beep Beeps
Repeated cycle
2.5-second OFF 3-second ON
Blinking at 0.5second interval
Repeated cycle
Beeps
Does POWER lamp on the indoor
unit blink at the interval of 0.5 seconds?
Blinks: Either indoor or outdoor unit is abnormal.
Beep are emitted at the same timing
as the blinking of POWER lamp. W2
The cause of abnormality cannot be found because the abnormality doesn't recur.
Setting up the failure mode recall function
Before blinking, does POWER
lamp stay ON for 3 seconds?
Stays ON for 3 seconds (without beep):
The outdoor unit is abnormal.
The indoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point with the indoor unit
failure mode table (9-2.4.).
Make sure to check at least two consecutive blinking cycles. W2
Turn ON the power supply.
<
Preparation of the remote controller
>
1 While pressing both OPERATION SELECT
button and TOO COOL button on the remote controller at the same time, press
RESET button.
2 First, release RESET button.
And release the other two buttons after all LCD except the set temperature in
operation display section of the remote controller is displayed after 3 seconds.
Deleting the abnormal memorized condition
1After repairing the unit, recall the failure mode again according to
"Setting up the failure mode recall function" mentioned above.
2Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature is displayed)
with the remote controller headed towards the indoor unit.
3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
4Release the failure mode recall function according to "Releasing the failure mode recall function"
mentioned above.
Repair the defective parts.
Release the failure mode recall function by the following procedures.
Turn OFF the power supply and turn it ON again.
Press RESET button of the remote controller.
Judgment of indoor/outdoor abnormality
Press OPERATE/STOP(ON/OFF) button of the remote controller (the set temperature
is displayed) with the remote controller headed towards the indoor unit. W1
The plasma or outdoor unit might be abnormal because there are some
abnormalities that can't be recalled with this way.
Confirm if plasma unit or outdoor unit is abnormal according to the flow
chart of the plasma unit or detailed outdoor unit failure mode recall
function.
The outdoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point with the
outdoor unit failure mode table (Refer to outdoor unit service manual.)
Make sure to check at least two consecutive blinking cycles. W3
Outline of the function
This air conditioner can memorize the abnormal condition which has occurred once.
Even though LED indication listed on the troubleshooting check table disappears, the memorized failure details can be
recalled.
This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.
1. Flow chart of failure mode recall function for the indoor/outdoor unit
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