SPLIT-TYPE, AIR CONDITIONERS
INDOOR UNIT
No. TBH014
SERVICE MANUAL
Wireless type
Models
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
Outdoor unit service manual
MU-GD•ND Series (TBH016)
CONTENTS
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
1. TECHNICAL CHANGES ................................... 2
2. PART NAMES AND FUNCTIONS ..................... 3
3. SPECIFICATION ................................................ 4
4. OUTLINES AND DIMENSIONS ........................ 5
5. WIRING DIAGRAM............................................ 6
6. REFRIGERANT SYSTEM DIAGRAM ............... 7
7. SERVICE FUNCTIONS ..................................... 8
8. TROUBLESHOOTING ..................................... 10
9. DISASSEMBLY INSTRUCTIONS ................... 19
PARTS CATALOG (TBB014)
TM
NOTE:
• RoHS compliant products have <G> mark on the spec name plate.
1
1
TECHNICAL CHANGES
MS-A08NDMS-A12ND-
C1
C1
➔ MS-GD08ND➔ MS-GD12ND-
C1
C1
1. Indoor unit has been changed.
• Front panel has been changed. (Flat Flat Shining)
2. Terminal block has been changed. 3P (L~, N~, 2~) 4P (L~, N~, 2~, Earth)
MS-A10ND-
C1
➔ MS-GD10ND-
1. Indoor unit has been changed.
• Front panel has been changed. (Flat
C1
Flat Shining)
2
2
PART NAMES AND FUNCTIONS
INDOOR UNIT
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
Air cleaning filter
(white bellows type)
Front panel
Air inlet
Panel
Catechin air filter
(with deodorizing)
Remote control
receiving section
Air outlet
Vertical vanes
Fan
Horizontal vane
Remote controller
Display section
Operation section
(When the front panel is opened)
Operation indicator lamp
Emergency operation switch
Remote control
receiving section
ACCESSORIES
1
2
3
4
5
6
7
8
Installation plate
Installation plate fixing screw 4 x 25 mm
Remote controller holder
Fixing screw for 3 3.5 x 16 mm (Black)
Battery (AAA) for remote controller
Wireless remote controller
Felt tape (Used for left or left-rear piping)
Air cleaning filter
MS-GD08NDMS-GD10NDMS-GD12ND1
5
1
2
2
1
1
2
3
C1
C1
C1
REMOTE CONTROLLER
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
Signal transmitting section
Operation display section
h
ON/OFF
OPERATE/STOP (ON/OFF) button
ECONO COOL button
I FEEL COOL
FAN DRY
TOO
WARM
TOO
COOL
ECONO COOL
FAN
POWERFUL COOL
VANE
These buttons are able to store the light
from nature, fluorescent lamp, etc and
shine in the dark.
TEMPERATURE buttons
FAN SPEED CONTROL button
VANE CONTROL button
POWERFUL COOL button
MODE SELECT
TIME
TIME SET button
Indication of remote controller
model is on back.
RESET button
OPERATION SELECT button
TIMER MODE SELECT button
3
RESET
SPECIFICATION
MS-GD08ND-
Indoor model
Special
remarks
Fan
motor
Electrical data
Capacity
Function
Power supply
Air flow (High/Med/Low)
Power outlet
Running current
Power input
Auxiliary heater
Power factor
Fan motor current
Model
Winding
resistance (at 20ºC)
Dimensions WoHoD
Weight
Air direction
Sound level (High/Med/Low)
Fan speed (High/Med/Low)
Fan speed regulator
Thermistor RT11 (at 25ºC)
Thermistor RT12 (at 25ºC)
Remote controller model
K/h
A
A
W
A (kW)
%
A
588/456/372
"
mm
kg
9
dB
rpm
39/32/26
1030/800/650
kΩ
kΩ
C1
MS-GD10ND-
MS-GD12ND-
C1
Cooling
Single phase 220-230V, 60Hz
630/498/336
10
0.19
40
—
96-92
0.19
RC4N19-BA
WHT-BLK 312
BLK-RED 255
815o278o244
5
39/32/26
960/800/650
3
10
10
MP2B
NOTE: Test conditions are based on CNS 14464
Cooling : Indoor
Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor
Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Refrigerant piping length (one way) 7.5 m
4
666/498/336
10
42/36/29
1000/800/650
C1
OUTLINES AND DIMENSIONS
Unit : mm
C1
INDOOR UNIT
81.5
133.5
4.5
MS-GD08ND-
231.5
Installation plate
Indoor unit
271
4
326
81.5
42
41
2.5
783
81.5
326
Wall hole [65
242
Air in
5
Installation plate
{
278
7 or more
815
90
149
606
30
60
Air out
17.5
244
Drain hose [16
(Connected part O.D)
Insulation [28
140
57
110
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[21 I.D
C1
161.5
Installation plate
218.5
INDOOR UNIT
Indoor unit
2.5
41
783
81.5
326
258
161.5
C1
42
MS-GD10NDMS-GD12ND-
17.5
Wireless remote controller
81.5
326
Wall hole [65
Air in
242
5
Installation plate
{
278
7 or more
815
149
606
17.5
Air out
140
57
90
30
60
Wireless remote controller
5
110
244
Liquid line [6.35-0.5m
Gas line [9.52-0.43m
Insulation [37 O.D
[ 21 I.D
Drain hose [16
(Connected part O.D)
Insulation [28
5
WIRING DIAGRAM
MS-GD08NDMS-GD12ND-
C1
C1
INDOOR UNIT
MS-GD10ND-
C1
6
6
REFRIGERANT SYSTEM DIAGRAM
MS-GD08NDMS-GD10ND-
MS-GD12ND-
C1
INDOOR UNIT
INDOOR UNIT
Refrigerant pipe
(Option){12.7
(with heat insulator)
Refrigerant pipe
(Option){9.52
(with heat insulator)
Indoor
heat
exchanger
RT11
Room
temperature
thermistor
C1
C1
Indoor coil
thermistor
RT12
Indoor
heat
exchanger
Flared
connection
RT11
Room
temperature
thermistor
Flared
connection
Indoor coil
thermistor
RT12
Flared
connection
Flared
connection
Refrigerant pipe
(Option){6.35
(with heat insulator)
Refrigerant flow in cooling
Refrigerant pipe
(Option){6.35
(with heat insulator)
7
7
SERVICE FUNCTIONS
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
7-1. 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 8-6.)
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.
7-2. 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 : MP2B
J1
J2
NOTE : For remodelling, take out the batteries and push the OPERATE/
STOP(ON/OFF)button twice or 3
times at first.
After finish remodelling, put back
the batteries then press the
RESET button.
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
7-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, 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. However if the unit is operated in “I FEEL
CONTROL” mode before power failure, the operation is not memorized. In “I FEEL CONTROL” mode, the operation is
decided by the initial room temperature.
1
C1
CN1V1 CN111
IC101
SW1
CN151
(Refer to 8-6.)
1 CN1R1 CN121CN112
21
P.C. board. (Refer to 9-1.)
N
How to release “AUTO RESTART FUNCTION”
1 Turn off the main power for the unit.
2 Pull out the indoor electronic control P.C. board and the power monitor, receiver
3 Solder the Jumper wire to the JR07 on the indoor electronic control P.C.board.
C
52C/X10
CN201
Operation
1 If the main power has been cut, the operation settings remain.
2 After the power is restored, the unit automatically resumes the same operation
as the memory has recorded.
However, it takes the compressor at least 3 minutes to get started.
JR07
NOTE:
• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
• If the 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 appliances 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.
9
8
TROUBLESHOOTING
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
8-1. 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.
Housing point
Lead wiring
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 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 discolouration.
4) When troubleshooting, refer to 8-2. and 8-3.
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 back lid and insert batteries.
2 Press the RESET button with tip end of ball point
Then reattach the back lid.
pen or the like, and then use the remote controller.
Insert the negative pole
of the batteries first.
Check if the polarity of
the batteries are correct.
RESET button
NOTE : 1. If the 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.
10
5.5.How
Howto
toinstall
install the
the horizontal
horizontal vanes
vanes
If Ifhorizontal
horizontalvanes
vanesare
arenot
notinstalled
installedcorrectly,
correctly,both
bothofofthe
theoperation
operationindicator
indicatorlamps
lampswill
willflash.
flash.
InInthis
thiscase,
case,install
installthe
thehorizontal
horizontalvanes
vanescorrectly
correctlyby
byfollowing
followingthe
theprocedures
procedures1
1to
to6.
6.
NOTE:
NOTE:Before
Beforeinstallation
installationofofthe
thehorizontal
horizontalvanes,
vanes,disconnect
disconnectthe
thepower
powersupply
supplyplug
plugand/
and/or
orturn
turnoff
off the
the breaker.
breaker.
Upper vane
6
Stopper
Insert this end first.
5
Stopper
4
Insert.
Upper right
In.
Lock.
Lock.
The holes on the
insertion ends of
the upper and lower
horizontal vanes have
different shapes.
Lower vane
Insert this end first.
2
3
Lower right
Lock.
1
Lock.
Insert.
In.
In procedure 2,3,5, and 6, lock the stoppers until they click into place.
11
8-2. Instruction of troubleshooting
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
operates in
only Test run
operation.
Check room
temperature
thermistor.
Refer to 8-6.
"Test point
diagram and
voltage".
Indoor unit
doesn't receive
the signal from
remote controller.
OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.
Outdoor unit
doesn't
operate
even in
Test run
operation.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Check of
wiring
diagram
of outdoor
unit.
Refer to 8-5. B
"Check of
remote controller
and receiver
P.C. board".
1. Check indoor /
outdoor
connecting wire.
2. Refer to 8-5. C
"Check of indoor
electronic control
P.C. board".
Both lamps
(Left and right)
Flash on and off at
0.5-second intervals
Cause:
Indoor unit
• The horizontal vanes
are not installed
correctly.
Left lamp
2-time flash
Cause:
Indoor unit
• Trouble of room
temperature/
indoor coil
thermistor
Left lamp
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor
Left lamp
4-time flash
Cause:
Indoor unit
• Trouble of
indoor control
system
Refer to 8-5. D
"Check of installation
of the horizontal vane".
Check room
temperature
thermistor and
indoor coil thermistor.
Refer to 8-6.
"Test point diagram
and voltage".
Refer to 8-5.A
"Check of
indoor fan
motor".
Replace the
indoor
electronic
control P.C.
board.
12
As for outdoor unit,
refer to service
manual TBH016
8-3. Troubleshooting check table
• The following indication applies regardless of shape of the indicator.
flashing
· Flashing of the OPERATION INDICATOR lamp (on the left)
indicates possible abnormalities.
· The OPERATION INDICATOR lamp (on the left) is
lighting during normal operation.
Operation Indicator
Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
Self check table
No.
Abnormal
point
Indication
Both lamps flash at the same time.
Attachment
1 of the
horizontal
vane
2
0.5-second ON
2.5-second OFF
Left lamp flashes.
3
Indoor fan
motor.
Indoor unit
and outdoor
unit do not
operate.
3-time flash
2.5-second OFF
Outdoor unit
does not
operate.
Indoor fan
motor repeats
12 seconds
ON and 3
minutes OFF.
When the
indoor fan
motor breaks,
the fan keeps
stopping.
Left lamp flashes.
4
Indoor
control
system
Detection method
When the electricity is not conducted to the
safety device (FAN) of the horizontal vane.
Check point
• Refer to 8-5. D "Check of
installation of the horizontal
vane".
0.5-second OFF
Indoor coil Left lamp flashes.
thermistor
2-time flash
Room
temperature
thermistor
Symptom
Outdoor unit
does not
operate.
4-time flash
Detect Indoor coil/room temperature
thermistor short or open circuit every 8
seconds during operation.
When rotational frequency feedback signal is
not emitting during 12-second indoor fan
operation.
When it cannot properly read data in the
nonvolatile memory of the indoor electronic
control P.C. board.
• Refer to the characteristics of
indoor coil thermistor and
room temperature thermistor
shown in 8-6.
• Refer to 8-5.A "Check of
indoor fan motor".
• Replace the indoor electronic
control P.C. board.
2.5-second OFF
NOTE : When the indoor unit has started operation and the above detection method has detected an abnormality (the first
detection after the power ON), the indoor electronic control P.C. board turns OFF the indoor fan motor with the
OPERATION INDICATOR lamp flashing.
13
8-4. Trouble criterion of main parts
MS-GD08NDMS-GD10NDMS-GD12ND-
C1
C1
C1
Check method and criterion
Part name
Room
temperature
thermistor (RT11)
Indoor coil
thermistor
(RT12)
Figure
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Normal
Abnormal
8k" ~ 20k"
Open or short-circuit
Indoor fan
motor (MF)
Motor part
Measure the resistance between the terminals with a tester.
(Coil wiring temperature10°C ~ 30°C)
Color of lead wire
WHT-BLK
Normal
Abnormal
299~324"
BLK-RED
244~265"
Open or
short-circuit
MAIN
INNER FUSE
145i 2: CUT OFF
AUX.
Sensor part
Measure the voltage Power ON.
FUSE
Abnormal
Color of lead wire
Normal
BRN-YLW
4.5 ~ 5.5V
YLW-GRY
(When fan revolved one time)
0V→ 5V→ 0V
(Approx.)
BLK
Remain 0V or 5V
Measure the resistance between the terminals with a tester.
(Part temperature10°C ~ 30°C)
Vane motor
(MV)
Normal
RED
Abnormal
Open or short-circuit
240 ~ 260"
RED WHT
ROTOR
YLW
BRN
ORN
14
GRN
8-5. Troubleshooting flow
When left OPERATION INDICATOR lamp flashes 3-time.
Indoor fan motor doesn’t operate.
Turn OFF the power supply.
Check connector CN211 visually.
A Check of indoor fan motor
No
Yes
Are lead wires connected?
Is soldering point of the connector
correctly soldered?
Yes
Reconnect the lead wires.
No
Resolder it.
Disconnect lead wires from connector CN211 on the indoor electronic control P.C. board.
Measure resistance between lead wires: No.1 and No.5 and then No.3 and No.5.
Is resistance 0 (short circuit) or ∞ (open circuit)?
Yes ( 0 or ∞)
No
(others)
Repair the indoor fan motor.
No
Insert screwdriver into air outlet to rotate indoor fan
motor slowly for 1 revolution or over, and measure
voltage No.2(+) and No.3(-) on CN121.
Does voltage repeat 0V DC and 5V DC?
Yes
Replace the indoor electronic control P.C. board.
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but doesn’t operate with the remote controller.
B Check of remote controller and receiver P.C. board
w Check if the remote controller is exclusive for this air conditioner.
Switch on the remote controller.
Is LCD display on the remote controller visible?
No
(not clear)
Replace the batteries.
(Refer to 8-1.4.)
Yes
Remove batteries, then set them back and
press the RESET button.
Check if the unit operates with remote
controller.
Does the unit operate with remote
controller?
No
Turn on a radio to AM and press switch on
the remote controller.
Yes
OK
Is noise heard from radio?
No
Replace the remote controller.
Yes
Are there any fluorescent lights of
inverter or rapid-start type within the
range of 1m?
Yes
● Reinstall the unit away from lights.
● Attach a filter on receiving part.
No
Measure the voltage between receiver P.C. board connector CN302 No.3(-) and No.5(+)
when the remote controller button is pressed.
Is the voltage approx. 4V DC?
No(5V or 0V DC)
Replace the power monitor, receiver P.C.board.
15
Yes
Replace the indoor electronic control
P.C. board
The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
C Check of indoor electronic control P.C. board
MS-GD10ND
Check both “parts side” and “pattern
side” of the indoor electronic control P.C.
board visually.
3
Turn OFF the power supply.
Remove indoor fan motor connector CN211 and
vane motor connector CN151 from the indoor electronic
control P.C. board and turn ON the power supply.
MS-GD08/GD12ND
1
CN201
3
2
1
L
N
CN201
F12
L
N
Does the unit operate with the remote controller?
No
Does the OPERATION INDICATOR lamp light up by
pressing the EMERGENCY OPERATION switch?
1
Terminal
block
Terminal
block
Yes
Turn OFF the
power supply.
Turn OFF the
power supply.
Replace the vane
motor.
Replace the fuse.
Yes
Yes
Is the winding
resistance of
vane motor 0 "?
No
Be sure to check both resistance.
Is the winding
resistance of
fan motor 0 "?
Is fuse(F11) blown?
Be sure to check both fuse
and varistor in any case.
Is varistor(NR11) burnt?
No
Yes
Yes
Replace the fan
motor.
No
Replace the varistor.
16
No
1.Pull out the power
supply cord.
2.Measure the
resistance between
CN201 1 on
the indoor electronic
control P.C. board
and on the
terminal block with
a tester.
Replace the
indoor electronic
control P.C. board.
Yes
Is there resistance
approx. 0 "?
No(∞)
Replace the fuse (F12).
When both OPERATION INDICATOR lamps flash ON and OFF every 0.5-second.
Indoor unit and outdoor unit don’t operate.
D Check of installation of the horizontal vane
Start
Turn OFF the
power supply.
Is the stopper of the horizontal vane
locked to the indoor unit correctly?
No
Relock the stopper of the
horizontal vane to the indoor unit.
Refer to 8-1-5.
Yes
Turn ON the
power supply.
Is the OPERATION
INDICATOR lamp flashing?
No
OK
Yes
To check the continuity of safety device,
measure the resistance of connector 1 - 3
connected to CN1R1 on the indoor
electronic control P.C. board.
Is there resistance 0 "?
No(∞)
Turn OFF the
power supply.
Replace the
safety device.
Yes
Replace the
indoor electronic
control P.C. board.
17
8-6. Test point diagram and voltage
C1
C1
C1
Indoor electronic control P.C. board
Fuse 250V AC 3.15A
Power supply input
220 - 230V AC
}
MS-GD08NDMS-GD10NDMS-GD12ND-
}
Varistor
(NR12)
Indoor fan motor
220 - 230V AC
Safety device of
fan by horizontal
vane CN1R1
Room temperature
thermistor (RT11)
Varistor
(NR11)
Indoor coil
thermistor (RT12)
J12
12V
DC
}
{ –+
Timer short mode
point JPG, JPS
(Refer to 7-1.)
Emergency
operation switch
}
J33
Power monitor, receiver P.C. board
J33
– +
J23
}
5V DC
Release of Auto restart function
Solder the Jumper wire to the JR07.
(Refer to 7-3.)
Resistance (k")
Indoor coil thermistor (RT12)
Room temperature thermistor (RT11)
CN302
Temperature (:)
18
9
DISASSEMBLY INSTRUCTIONS
<”Terminal with locking mechanism” Detaching points>
The terminal which has the locking mechanism can be detached as shown below.
There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism.
The terminal without locking mechanism can be detached by pulling it out.
Check the shape of the terminal before detaching.
(1) Slide the sleeve and check if there is a locking lever or not.
Sleeve
Locking lever
9.1 MS-GD08ND- C1
INDOOR UNIT
(2) The terminal with this connector has the locking
mechanism.
1 Slide the sleeve.
2 Pull the terminal
while pushing
the locking lever.
MS-GD10ND-
C1
Connector
MS-GD12ND-
1 Hold the sleeve, and
pull out the terminal
slowly.
C1
OPERATING PROCEDURE
PHOTOS
1. Removing the panel
(1) Remove the screw caps of the panel.
Remove the screws.
(2) Pull the panel down to your side slightly and unhook the
catches at the top.
Photo 1
Screws of the panel
2. Removing the electronic control P.C. board and the
power monitor, receiver P.C. board
NOTE : In case of removing only indoor electronic control
P.C. board work (3) is not necessary.
(1) Remove the panel. (Refer to 1.)
(2) Remove the power monitor, receiver P.C. board
holder from the bottom of electrical box.
(3) Open the power monitor, receiver P.C. board holder and
remove the power monitor, receiver P.C. board.
(4) Remove the screw of the electrical cover and the electrical
cover.
(5) Remove the screw of the V.A. clamp and the V.A. clamp.
(6) Remove the screw of the cord clamp and the cord clamp.
(7) Remove the screw of the terminal block.
(8) Remove the screw of the ground wire.
(9) Pull out indoor electronic control P.C. board slightly.
(10) Disconnect all (except CN125, CN109) the connectors on
the electronic control P.C. board.
(11) Remove the electronic control P.C. board.
(12) Disconnect the connector of power monitor, receiver P.C.
board (CN 125, CN109) on the electronic control P.C.
board.
19
Photo 2
Screw of the
ground wire
Terminal block
fixing screw
Indoor electronic
control P.C. board
Screw of the V.A.
clamp
Screw of the
electrical cover
Power monitor, receiver
P.C. board holder
OPERATING PROCEDURE
PHOTOS
3. Removing the electrical box
Remove the panel. (Refer to 1.)
Remove the electrical cover. (Refer to 2.)
Remove the V.A. clamp. (Refer to 2.)
Remove the cord clamp. (Refer to 2.)
Remove the terminal block. (Refer to 2.)
Remove the screw of ground wire. (Refer to 2.)
Disconnect the connector of the indoor coil thermistor
(CN112), the fan motor connector (CN211 and CN121) and
the vane motor connector (CN151)on the electronic control
P.C. board.
(8) Remove the fan motor lead wire and indoor coil thermistor
from the electrical box.
(9) Remove the lead wire of vane motor from the bottom of
electrical box.
(10) Remove the screw fixing the electrical box, remove the
electrical box.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Photo 3
Indoor coil thermistor
connector
Vane motor
connector
Screw of the
electrical box
Fan motor connectors
4. Removing the nozzle assembly and the vane motor
(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical box. (Refer to 3.)
(3) Pull out the drain hose from the nozzle assembly, remove
the nozzle assembly.
(4) Remove the screws of the vane motor, disconnect the
vane motor connector.
(5) Remove the vane motor.
Photo 4
Screws of the vane motor
Drain hose
5. Removing the indoor fan motor and the line flow fan
(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical box. (Refer to 3.)
(3) Pull out the drain hose from the nozzle assembly, and
remove the nozzle assembly. (Refer to 4.)
(4) Remove the screw of the lead cover and lead cover.
(5) Release the hooks to open the motor band slightly.
(6) Loosen the hexagon socket set screw from the line flow
fan.
(7) Remove the screws fixing the motor bed, and remove the
fan motor with motor band and the motor bed.
(8) Remove the screws fixing the left side of the heat
exchanger.
(9) Lift the left side of the heat exchanger.
(10) Remove the line flow fan.
Photo 6
Screw of
the lead
cover
Photo 5
Screws of the
left side of the
heat exchanger
Photo 7
Hexagon socket set screw
Hooks of the
motor band
20
Screws of
the motor
bed
TM
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
MITSUBISHI ELECTRIC CONSUMER PRODUCTS (THAILAND) CO., LTD.
AMATA NAKORN INDUSTRIAL ESTATE
700/406 MOO 7, TAMBON DON HUA ROH,
AMPHUR MUANG, CHONBURI 20000 THAILAND
Made in Thailand
New publication, effective Feb. 2008
Specifications subject to change without notice.