Használati útmutató Mitsubishi MSY-GL09NA-U1
Mitsubishi
légkondicionáló
MSY-GL09NA-U1
Olvassa el alább 📖 a magyar nyelvű használati útmutatót Mitsubishi MSY-GL09NA-U1 (52 oldal) a légkondicionáló kategóriában. Ezt az útmutatót 2 ember találta hasznosnak és 2 felhasználó értékelte átlagosan 4.5 csillagra
Oldal 1/52
SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES· ······························· 2
2. PART NAMES AND FUNCTIONS ··················3
3. SPECIFICATION ········································6
4. OUTLINES AND DIMENSIONS ·····················8
5. WIRING DIAGRAM ··································· 10
6. REFRIGERANT SYSTEM DIAGRAM ··········· 12
7. SERVICE FUNCTIONS ······························13
8. MICROPROCESSOR CONTROL ················15
9. TROUBLESHOOTING ·······························23
10. DISASSEMBLY INSTRUCTIONS ·················41
No. OBH732
REVISED EDITION-C
Outdoor unit service manual
MUZ-GL•NA, MUY-GL NA Series (OBH733)•
MXZ-C•NA, MXZ-C•NAHZ Series (OCH573)
NOTE:
RoHS compliant products have <G> mark on the spec name plate.
PARTS CATALOG (OBB732)
MSZ-GL06NA - U1
MSZ-GL09NA - U1
MSZ-GL12NA - U1
MSZ-GL15NA - U1
MSZ-GL18NA - U1
MSZ-GL24NA - U1
Models
MSZ-GL18NA
MSY-GL18NA
INDOOR UNIT
Revision C:
• For the airflow of MSZ-GL24NA- U1 and MSY-
GL24NA- U1 on the specification table has
been corrected (3. SPECIFICATION).
OBH732 REVISED EDITION-A is void.
MSY-GL09NA - U1
MSY-GL12NA - U1
MSY-GL15NA - U1
MSY-GL18NA - U1
MSY-GL24NA - U1
2
MSZ-GL18NA - U1 MSY-GL18NA - U1
MSZ-GL24NA - U1 MSY-GL24NA - U1
1. New model
1TECHNICAL CHANGES
Use the specied 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.
Revision A:
• MSZ-GL06/09/12/15NA- U1 and MSY-GL09/12/15NA- U1 have been added.
Revision B:
• 3. SPECIFICATION has been corrected.
MSZ-GL06NA - U1 MSY-GL09NA - U1
MSZ-GL09NA - U1 MSY-GL12NA - U1
MSZ-GL12NA - U1 MSY-GL15NA - U1
MSZ-GL15NA - U1
1. New model
Revision C:
• For the airflow of MSZ-GL24NA- U1 and MSY-GL24NA- U1 on the specification table has been corrected
(3. SPECIFICATION).
OBH732C
3
2PART NAMES AND FUNCTIONS
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA
Remote controller
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Horizontal vane
Air outlet
Air fi lter
Air inlet
Heat exchanger
Front panel
Air cleaning fi lter
(Anti-Allergy Enzyme
Filter)
(Nano platinum fi lter
)
Display section
ACCESSORIES
Installation plate 1
Attachment screws for the installation plate
4 × 25 mm 5
Remote controller holder 1
Screws for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Air cleaning lter 2
OBH732C
4
MSZ-GL18NA
MSY-GL18NA
ACCESSORIES
Installation plate 1
Installation plate xing screw 4 × 25 mm 5
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 1
Air cleaning lter 2
Remote controller
Operation indicator lamp
Remote control receiving section
Emergency operation switch
Horizontal vane
Air outlet
Air fi lter
Air inlet
Heat exchanger
Front panel
Air cleaning fi lter
(Anti-Allergy Enzyme
Filter)
(Nano platinum fi lter
)
Display section
OBH732C
5
Remote controller
Display section
Front panel
Air fi lter
(Nano platinum filter)
Air inlet
Air cleaning filter
(Electrostatic anti-allergy
enzyme filter)
Air outlet
Horizontal vane
Heat exchanger
Operation indicator lamp
Remote control receiving section
Emergency operation switch
MSZ-GL24NA
MSY-GL24NA
ACCESSORIES
Installation plate 1
Installation plate xing screw 4 × 25 mm 7
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black) 2
Battery (AAA) for remote controller 2
Wireless remote controller 1
Felt tape (Used for left or left-rear piping) 1
Air cleaning lter 2
OBH732C
6
3SPECIFICATION
Indoor model MSZ-GL15NA
MSY-GL15NA
MSZ-GL18NA
MSY-GL18NA
MSZ-GL24NA
MSY-GL24NA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/ Disconnect switch
A 15 20/15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76 0.67 0.76
Airow
Super High - High - Med. -
Low - Quiet ( )GL15/18
Powerful - Super High -
High - Med. - Low ( )GL24
COOL Dry
(Wet) CFM
533 - 420 - 335 - 272 - 205
(498 - 385 - 300 - 237 - 170)
646 - 522 - 417 - 332 - 258
(581 - 470 - 375 - 299 - 232)
738 - 628 - 544 - 469 - 388
(661 - 562 - 487 - 420 - 347)
HEAT Dry
( )MSZ CFM
463 - 367 - 304 - 247 - 205 646 - 565 - 469 - 385 - 297 738 - 628 - 544 - 469 - 388
Moisture removal pt./h 2.7 2.1 5.1
Sound level
Super High - High - Med. -
Low - Quiet ( )GL15/18
Powerful - Super High -
High - Med. - Low ( )GL24
Cooling dB(A) 49 - 44 - 38 - 32 - 26 49 - 44 - 38 - 33 - 28 53 - 49 - 45 - 41 - 34
Heating
( )MSZ dB(A) 46 - 40 - 35 - 30 - 26 48 - 43 - 38 - 33 - 28 52 - 49 - 45 - 41 - 32
Fan speed
Super High - High - Med. -
Low - Quiet ( )GL15/18
Powerful - Super High -
High - Med. - Low ( )GL24
Cooling rpm
1,280 - 1,060 - 880 - 740 - 600 1,170 - 990 - 830 - 700 - 580
1,300 - 1,140 - 1,010 - 900 - 770
Heating
( )MSZ rpm
1,140 - 950 - 810 - 690 - 600 1,170 - 1,050 - 910 - 780 - 640
1,300 - 1,140 - 1,010 - 900 - 730
Cond. drain connection O.D. 5/8in.
Dimensions
W
in.
31-7/16 36-5/16 43-5/16
D 9-1/8 9-13/16 9-3/8
H11-5/8 12 12-13/16
Weight Ib. 22 28 37
External nish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 VDC
NOTE: Test conditions are based on AHRI 210/240.
Indoor model MSZ-GL06NA MSZ-GL09NA
MSY-GL09NA
MSZ-GL12NA
MSY-GL12NA
Power supply V, phase, Hz 208/230, 1, 60
Max. fuse size (time delay)/ Disconnect switch
A 15
Min. circuit ampacity A 1.0
Fan motor F.L.A 0.76
Airow
Super High - High - Med. -
Low - Quiet
COOL Dry
(Wet) CFM 399 - 321 - 237 - 170 - 145
(364 - 286 - 201 - 134 - 109)
HEAT Dry CFM 406 - 321 - 237 - 170 - 145
Moisture removal –pt./h 1.5 2.5
Sound level
Super High - High - Med. -
Low - Quiet
Cooling dB(A)
43 - 37 - 30 - 22 - 19
45 - 37 - 30 - 22 - 19
Heating
( )MSZ dB(A) 43 - 37 - 30 - 22 - 19
Fan speed
Super High - High - Med. -
Low - Quiet
Cooling 1,020 - 860 - 670 - 530 - 470rpm
Heating
( )MSZ rpm 1,040 - 860 - 670 - 530 - 470
Cond. drain connection O.D. 5/8in.
Dimensions
W
in.
31-7/16
D 9-1/8
H11-5/8
Weight Ib. 22
External nish Munsell 1.0Y 9.2/0.2
Control voltage (by built-in transformer) 12 - 24 VDC
OBH732C
7
(2) OPERATION
Mode Condition
Intake air temperature (°F)
Indoor Outdoor
DB WB DB WB
Cooling
Standard temperature — 80 67 95
Maximum temperature 90 73 115 —
Minimum temperature 14 — 67 57
Maximum humidity 78% —
Heating
Standard temperature 70 60 47 43
Maximum temperature 80 67 75 65
Minimum temperature 70 60 -4 -5
3-1. OPERATING RANGE
(1) POWER SUPPLY
Rated voltage Guaranteed voltage (V)
Indoor unit
208/230 V
1 phase
60 Hz
Min. 187 208 230 Max. 253
3-2. OUTLET AIR SPEED AND COVERAGE
● The air coverage is the figure up to the
position where the air speed is 1 ft./s.,
when air is blown out horizontally from
the unit properly at the High speed posi-
tion.
The coverage should be used only as a
general guideline since it varies accord-
ing to the size of the room and furniture
arranged inside the room.
Model Mode Function Airow
(CFM)
Air speed
(ft./s.)
Coverage
(ft.)
MSZ-GL06NA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
MSZ-GL09NA
MSY-GL09NA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
MSZ-GL12NA
MSY-GL12NA
HEAT Dry 406 20.6 29.5
COOL Dry 321 16.3 23.5
Wet 286 14.5 21.0
MSZ-GL15NA
MSY-GL15NA
HEAT Dry 463 23.4 33.5
COOL Dry 420 21.3 30.5
Wet 385 19.5 28.0
MSZ-GL18NA
MSY-GL18NA
HEAT Dry 646 29.5 44.0
COOL Dry 646 29.5 44.0
Wet 581 26.5 39.7
MSZ-GL24NA
MSY-GL24NA
HEAT Dry 738 18.0 36.9
COOL Dry 738 18.0 36.9
Wet 661 16.1 33.2
OBH732C
8
Unit: inch
MSZ-GL18NA
MSY-GL18NA
4OUTLINES AND DIMENSIONS
Piping
Insulation Ø2 O.D
Liquid line Ø5/16 15-3/8 (Flared connection Ø1/4)
Gas line Ø15/32 13-3/8 (Flared connection Ø1/2)
Drain hose
Insulation Ø1-1/8 Connected part Ø5/8 O.D
3/4
6-1/4
2-5/16
2-1/4
2-1/2
9-13/16
3/16
35-13/16
36-5/16
1/4
27-15/16 6-5/16
2-1/16
12
2-9/16
2-13/16
2-1/2
2-9/16
3-11/16
2-1/16
9-7/16
10-5/16
1/8
8-7/8 8-7/8
3-11/16
8-3/4
10-3/8
2-5/16 15-7/8
8-11/16
3-11/16
7/8
1×7/16 Oblong hole
7/16×13/16
Oblong hole
Installation plate
Indoor unit
Wall hole Ø3
Air in
Installation plate
8-1/16
15-3/16
1-5/8
8-11/16
3
1-11/16
2-9/16
2-9/16
4-1/2
5-3/4
1/4
Air out
Piping
Drain hose
3-15/16
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA
Piping
Insulation ø1 - 3/8 O.D
Liquid line ø1/4 19 - 11/16 (Flared connection ø1/4)
Gas line ø3/8 16 - 15/16
(Flared connection: ø3/8 ( ), ø1/2 ( ))GL06/09/12NA GL15NA
Drain hose Insulation ø1-1/8 O.D Connected part ø5/8 O.D
OBH732C
9
MSZ-GL24NA
MSY-GL24NA
Unit: inch
OBH732C
10
MSZ-GL18NA
MSY-GL18NA
5WIRING DIAGRAM
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA
OBH732C
11
MSZ-GL24NA
MSY-GL24NA
OBH732C
12
MSZ-GL18NA
MSY-GL18NA
Unit: inch (mm)
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø1/2 (ø12.7)
(with heat insulator)
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
6REFRIGERANT SYSTEM DIAGRAM
MSZ-GL24NA
MSY-GL24NA
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø5/8 (ø15.88)
(with heat insulator)
Refrigerant pipe ø3/8 (ø9.52)
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant pipe ø3/8 (ø9.52) (MSZ-GL06/09/12NA, MSY-GL09/12NA)
ø1/2 (ø12.7) (MSZ-GL15NA, MSY-GL15NA)
(with heat insulator)
Refrigerant pipe ø1/4 (ø6.35)
(with heat insulator)
Indoor coil
thermistor
RT12 (main)
Indoor coil
thermistor
RT13 (sub)
Refrigerant flow in cooling
Refrigerant flow in heating
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA
OBH732C
13
7-1. TIMER SHORT MODE
For service, the set time can be shortened by bridging of the timer short point on the indoor electronic control P.C. board.
The time will be shortened as follows. (Refer to 9-7.)
• The set time for the ON/OFF timer can be reduced to 1 second for each minute.
• After the breaker is turned on, the time for starting the compressor, which normally takes 3 minutes, can be reduced to
3 seconds. Restarting the compressor, which takes 3 minutes, cannot be reduced.
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:
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.
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.
J2
J1
Table 1
1 unit operation 4 units operation2 units operation 3 units operation
No. 1 unit No modication 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 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.
7SERVICE FUNCTIONS
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA MSZ-GL18NA MSZ-GL24NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA MSY-GL18NA MSY-GL24NA
OBH732C
14
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 turned 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 the breaker from tripping 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.
7-3. 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 shut-off of the main power.
Operation
If the main power has been cut, the operation settings remain.
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 “AUTO RESTART FUNCTION”disable
Turn OFF the main power of the unit.
Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (GL06/09/12/15NA)
Cut the Jumper wire JR77 on the indoor electronic control P.C. board. (Refer to 9-7.)(GL18/24NA)
CN111
CN112
CN152
CN10A
Indoor electronic
control P.C. board
JR77
CN151
JR77
Indoor electronic
control P.C. board
CN10ACN111
CN151
CN112
CN110
MSZ-GL24NA
MSY-GL24NA
MSZ-GL18NA
MSY-GL18NA
CN 1CN112 11
CN151
CN10A
Indoor electronic
control P.C. board
JR07
MSZ-GL06/09/12/15NA
MSY-GL09/12/15NA
OBH732C
15
WIRELESS REMOTE CONTROLLER
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.
ON TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
OFF TIMER button
RESET button
SMART SET button
VANE CONTROL button
WIDE VANE button
(Vertical vane button)
Signal transmitting section
Operation display section
TEMPERATURE buttons
STOP/OPERATE
(OFF/ON) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
Indication of
remote controller
model is on back
8MICROPROCESSOR CONTROL
E.g.: MSZ type
MSZ-GL18NA
MSY-GL18NA
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA MSZ-GL18NA MSZ-GL24NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA MSY-GL18NA MSY-GL24NA
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA
ON TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
OFF TIMER button
RESET button
SMART SET button
VANE CONTROL button
Signal transmitting section
Operation display section
TEMPERATURE buttons
STOP/OPERATE
(OFF/ON) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
Indication of
remote controller
model is on back
OBH732C
16
Operation Indicator lamp
The operation indicator at the right side of the indoor unit indicates the operation state.
• The following indication applies regardless of shape of the indication.
Indication Operation state Room temperature
The unit is operating to
reach the set temperature
About 4°F(2°C) or more
away from set tempera-
ture
The room temperature is
approaching the set tem-
perature
About 2 to 4°F(1 to 2°C)
from set temperature
Standby mode
(Only during multi system
operation)
-
INDOOR UNIT DISPLAY SECTION
Lighted
Blinking
Not lighted
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.
MSZ-GL24NA
MSY-GL24NA
Signal transmitting section
Operation display section
Indication of
remote controller
model is on back
TEMPERATURE buttons
VANE CONTROL button
(Horizontal vane button)
WIDE VANE button
(Vertical vane button)
ON TIMER button
CLOCK SET button
TIME SET buttons
FORWARD button
BACKWARD button
OFF TIMER button
RESET button
POWERFUL button
STOP/OPERATE
(OFF/ON) button
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
OBH732C
17
8-1. COOL ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR 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 61 ~ 88°F (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.
8-2. DRY ( ) OPERATION
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR 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 works the same way as that in the COOL mode. (8-1.1.)
2. Low outside temperature operation
Low outside temperature operation works the same way as that in the COOL mode. (8-1.2.)
8-3. HEAT ( ) OPERATION (MSZ)
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR 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 61 ~ 88°F (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 tem-
perature 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 con-
densing 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.
8-4. FAN( )OPERATION (MSY)
(1) Press STOP/OPERATE (OFF/ON) button.
OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone.
(2) Select FAN mode with OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates. Outdoor unit does not operate.
8-5. “I FEEL CONTROL” ( ) OPERATION (MSY)
(1) Press STOP/OPERATE (OFF/ON) button on the remote controller. OPERATION INDICATOR lamp of the indoor unit
turns ON with a beep tone.
(2) Select “I FEEL CONTROL” mode with OPERATION SELECT button.
(3) The operation mode is determined by the room temperature at startup of the operation.
• Once the mode is fixed, the mode does not change by room temperature afterwards.
• Under the ON TIMER ( ) operation, mode is determined according to the room temperature at the startup of oper-
ation.
OBH732C
18
(4) The initial set temperature is decided by the initial room temperature.
Initial room temperature Initial set temperatureModel
79°F (26°C) or more
COOL mode of
"I FEEL CONTROL"
75°F (24°C)
77 to 79°F (25 to 26°C) Initial room temperature minus 4°F (2°C)
Less than 79°F (25°C) DRY mode of
"I FEEL CONTROL" Initial room temperature minus 4°F (2°C)
(5) TEMPERATURE buttons
In “I FEEL CONTROL” ( ) mode, set temperature is decided by the microprocessor based on the room temperature.
In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too
warm.
Each time the TOO WARM or TOO COOL button is pressed, the indoor unit receives the signal and emits a beep tone.
• Fuzzy control
When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, consider-
ing the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user's preference to
heat or cool. So this is called “Fuzzy control”, and works only in “I FEEL CONTROL” mode.
In DRY mode of “I FEEL CONTROL”, the set temperature does not change.
TOO
COOL
…To raise the set temperature 2~4°F (1~2°C)
TOO
WARM
…To lower the set temperature 2~4°F (1~2°C)
8-6. AUTO CHANGE OVER ∙∙∙ AUTO MODE OPERATION (MSZ)
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°F (1°C) below
the set temperature.
HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2°F (1°C) above
the set temperature.
NOTE 1
If 2 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. (MSZ)
Refer to NOTE 2 "FOR MULTI SYSTEM AIR CONDITIONER".
NOTE 2
FOR MULTI SYSTEM AIR CONDITIONER
OUTDOOR UNIT: MXZ series
Multi system air conditioner can connect 2 or more indoor units with 1 outdoor unit.
• When you try to operate 2 or more indoor units with 1 outdoor unit simultaneously, 1 for the cooling and the oth-
ers for heating, the operation mode of the indoor unit that operates first is selected. Other indoor units cannot
operate, and operation indicator lamp flashes as shown in the figure below. In this case, please set all the indoor
units to the same operation mode.
• When indoor unit starts 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 flow-
ing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.
Lighted
Blinking
Not lighted
<Operation indicator lamp>
OBH732C
19
8-7. AUTO VANE OPERATION
1. Horizontal vane
(1) Vane motor drive
These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of
the motor are controlled by pulse signals (approximately 12 V) transmitted from indoor microprocessor.
(2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button.
(3) Positioning
To confirm the standard position, the vane moves until it touches the vane stopper. Then the vane is set to the selected
angle.
Confirmation of standard position is performed in the following cases:
(a) When the operation starts or finishes (including timer operation).
(b) When the test run operation starts.
(c) When standby mode (only during multi system operation) starts or finishes.
(4) VANE AUTO ( ) mode
The microprocessor automatically determines the vane angle to make the optimum room temperature distribution.
Horizontal
position
5
In COOL and DRY operation
Vane angle is fixed to Horizontal position.
In HEAT operation
Vane angle is fixed to Angle 5.
(5) STOP (operation OFF) and ON TIMER standby
In the following cases, the horizontal vane returns to the closed position.
(a) When STOP/OPERATE (OFF/ON) button is pressed (POWER OFF).
(b) When the operation is stopped by the emergency operation.
(c) When ON TIMER is ON standby.
(6) Dew prevention
During COOL or DRY operation with the vane angle at Angle 4 or 5 when the compressor cumulative operation time
exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention.
(7) SWING ( ) mode
By selecting SWING mode with VANE CONTROL button, the horizontal vane swings vertically.
(8) Cold air prevention in HEAT operation (MSZ)
The horizontal vane position is set to Upward.
NOTE: When 2 or more indoor units are operated with multi outdoor unit, even if any indoor unit turns thermostat OFF,
this control does not work in the indoor unit.
(9) ECONO COOL ( ) operation (ECONOmical operation)
When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 4°F(2°C) higher.
Also the horizontal vane swings in various cycle.
SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher, the air
conditioner can keep comfort. As a result, energy can be saved.
To cancel this operation, select a different mode or press one of the following buttons in ECONO COOL operation:
ECONO COOL, VANE CONTROL, or POWERFUL (MSZ-GL24NA, MSY-GL24NA) button.
(
10
) POWERFUL ( ) operation. (MSZ-GL24NA MSY-GL24NA)
The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode.
The POWERFUL mode is automatically released 15 minutes after operation starts, and the operation mode returns
to the mode prior to POWERFUL operation. To cancel this operation manually, select a different mode or press
POWERFUL or ECONO COOL button.
OBH732C
20
2. Vertical vane (MSZ-GL18/24NA MSY-GL18/24NA)
(1) Vane motor drive
These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the
motor are controlled by pulse signals (approximately 12 V) transmitted from microprocessor.
(2) The vertical vane angle and mode change as follows by pressing WIDE VANE button.
(3) Positioning
(a) When STOP/OPERATE (OFF/ON) button is pressed (POWER ON).
(b) When SWING is started.
(c) When the power supply turns ON.
(4) SWING MODE ( )
By selecting SWING mode with WIDE VANE button, the vertical vane swings horizontally.
The remote controller displays “ ”. Swing mode is cancelled when WIDE MODE button is pressed once again.
61 2 3 4 5SWING
51 2 3 4SWING
(5) WIDE MODE ( ) (MSZ-GL24NA MSY-GL24NA)
By selecting WIDE mode with WIDE VANE button, indoor fan speed becomes faster than setting fan speed on the
remote controller ( ). The remote controller displays “ ”.
NOTE:
Indoor fan speed becomes faster than setting fan speed on the remote controller even when or is selected.
MSZ-GL24NA MSY-GL24NA
MSZ-GL18NA MSY-GL18NA
8-8. TIMER OPERATION
1. How to set the time
(1) Check that the current time is set correctly.
NOTE: Timer operation will not work without setting the current time. Initially “0:00 AM” blinks at the current time display
of TIME MONITOR, so set the current time correctly with CLOCK SET button.
How to set the current time
(a) Press the CLOCK set button.
(b) Press the TIME SET buttons ( and ) to set the current time.
• Each time FORWARD button (
) is pressed, the set time increases by 1 minute, and each time BACK-
WARD button ( ) is pressed, the set time decreases by 1 minute.
• Pressing those buttons longer, the set time increases/decreases by 10 minutes.
(c) Press the CLOCK set button.
(2) Press STOP/OPERATE (OFF/ON) button to start the air conditioner.
(3) Set the time of timer.
ON timer setting
(a) Press ON TIMER button ( ) during operation.
(b) Set the time of the timer using TIME SET buttons ( and ).
OFF timer setting
(a) Press OFF TIMER button ( ) during operation.
(b) Set the time of the timer using TIME SET buttons (
and ).
Each time FORWARD button ( ) is pressed, the set time increases by 10 minutes: each time BACKWARD
button ( ) is pressed, the set time decreases by 10 minutes.
2. To release the timer
To release ON timer, press ON TIMER button ( ).
To release OFF timer, press OFF TIMER button ( ).
TIMER is cancelled and the display of set time disappears.
OBH732C
21
(Example 1)
The current time is 8:00 PM.
The unit turns OFF at 11:00 PM, and ON at 6:00
AM.
• OFF timer and ON timer can be used in combination. The set time that is reached first will operate first.
• “ ” and “ ” display shows the order of OFF timer and ON timer operation.
PROGRAM TIMER
(Example 2)
The current time is 11:00 AM.
The unit turns ON at 5:00 PM, and OFF at 9:00
PM.
P M
AM
PM
PM
NOTE: If the main power is turned OFF or a power failure occurs while ON/OFF timer is active, the timer setting is can-
celled. As these models are equipped with an auto restart function, the air conditioner starts operating with timer
cancelled when power is restored.
8-9. SMART SET ( ) OPERATION (MSZ-GL06/09/12/15/18NA MSY-GL09/12/15/18NA)
1. How to SET SMART SET operation
(1) Press STOP/OPERATE (OFF/ON) button.
(2) Select COOL, HEAT or ECONO COOL mode.(MSZ)
(3) Press SMART SET button.
(4) Set the temperature, fan speed, and airow direction for SMART SET operation.
NOTE: • SMART SET operation cannot be selected during DRY or AUTO mode operation.
• The setting range of HEAT mode in SMART SET operation is between 50°F (10°C) and 61 - 88°F (16 - 31°C)
.(MSZ)
• 2 settings can be saved. (One for COOL/ECONO COOL, one for HEAT) (MSZ).
• 1 setting can be saved. (MSY).
2. How to cancel operation
• Press SMART SET button again.
• SMART SET operation can also be cancelled by pressing OPERATION SELECT button to change the operation mode.
The same setting will be selected from the next time by simply pressing SMART SET button.
OBH732C
22
8-10. EMERGENCY/TEST OPERATION
In the case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the right side of the
indoor unit. Emergency operation is available when the remote
controller is missing, has failed, or when the batteries in the remote
controller running down. The unit will start and OPERATION
INDICATOR lamp will light up.
The first 30 minutes of operation is the test run operation. This
operation is for servicing. The indoor fan runs at High speed and
the temperature control does not work.
After 30 minutes of test run operation, the system shifts to
EMERGENCY COOL/HEAT MODE with a set temperature of (MSZ)
75°F (24°C). The fan speed shifts to Med.
All protective operations such as the coil frost prevention works
even in the test run or emergency operation.
In the test run or emergency operation, the horizontal vane oper-
ates in VANE AUTO ( ) mode.
Emergency operation continues until EMERGENCY OPERATION
switch is pressed once or twice or the unit receives any signal from
the remote controller. In the latter case normal operation will start.
NOTE: Do not press EMERGENCY OPERATION switch during
normal operation.
8-11. 3-MINUTE TIME DELAY OPERATION
When the system turns OFF, compressor will not restart for 3 minutes as 3-minute time delay function operates to protect
compressor from overload.
8-12. Changing temperature indication (°F/°C)
• The preset unit is °F.
• °F → °C: Press RESET button while the temperature
buttons are pressed.
• °C → °F: Press RESET button or remove the batteries .
Press RESET button gently using
a thin instrument.
Operation mode COOL HEAT ( )MSZ
Set temperature 75°F(24°C) 75°F(24°C)
Fan speed Med. Med.
Horizontal vane Auto Auto
The operation mode is indicated by the Operation
Indicator lamp as follows.
Lighted
Not lighted
MSZ
EMERGENCY
COOL
↓
EMERGENCY
HEAT
↓
STOP
MSY
EMERGENCY
COOL
↓
STOP
OBH732C
23
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 miswiring.
2. Take care of 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 confirm-
ing 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 P.C. board.
3) When removing the 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 connector housing. 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 OPERATION INDICATOR lamp is flashing ON and OFF before starting ser-
vice work.
2) Before servicing check that the connector and terminal are connected properly.
3) When the P.C. board seems 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.
Lead wiring Connector housing
<Incorrect> <Correct>
RESET button
Insert the negative pole of the
batteries first. Check if the polarity
of the batteries is 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.
3. Do not use the leaking batteries.
Press RESET button with a thin instrument, and
then use the remote controller.
Remove the front lid and insert batteries.
Then reattach the front lid.
9TROUBLESHOOTING
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA MSZ-GL18NA MSZ-GL24NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA MSY-GL18NA MSY-GL24NA
OBH732C
24
9-2. FAILURE MODE RECALL FUNCTION
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 (9-4.) disappears, the memorized failure details can
be recalled.
1. Flow chart of failure mode recall function
for the indoor/outdoor unit
Does upper lamp of OPERATION INDICATOR
lamp on the indoor unit blink at the interval of 0.5
seconds?
Blinks: Either indoor or outdoor unit is abnormal.
Beep is emitted at the same timing as the
blinking of upper lamp of OPERATION
INDICATOR lamp. 2
Indoor unit is normal.
But the outdoor unit might be abnormal because there are some abnor-
malities that cannot be recalled with this way.
Check if outdoor unit is abnormal according to the detailed outdoor unit
failure mode recall function.
No
Yes
The cause of abnormality cannot be found because the abnormality does not recur.
Setting up the failure mode recall function
Turn ON the power supply.
<Preparation of the remote controller>
While pressing both OPERATION SELECT button and TOO COOL button on the
remote controller at the same time, press RESET button.
First, release RESET button.
Hold down the other 2 buttons for another 3 seconds. Make sure that the indicators on
the LCD screen shown in the right gure are all displayed.
Then release the buttons.
Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is
displayed) with the remote controller headed towards the indoor unit. 1
Judgment of indoor/outdoor abnormality
Before blinking, does upper lamp of
OPERATION INDICATOR lamp stay ON for 3
seconds?
When it stays ON for 3 seconds (without beep):
The outdoor unit is abnormal.
The indoor unit is abnormal.
Check the blinking pattern, and identify the abnormal point by referring to the
indoor unit failure mode table. (Refer to 9-2.2)
Make sure to check at least 2 consecutive blinking cycles. 2
Releasing the failure mode recall function
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.
The outdoor unit is abnormal.
Check the blinking pattern, and identify the abnormal point by referring
to the outdoor unit failure mode table. (Refer to outdoor unit service
manual.)
Make sure to check at least 2 consecutive blinking cycles. 3
Repair the failure parts.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall
function" mentioned above.
Press STOP/OPERATE (OFF/ON) button of the remote controller (the set temperature is displayed)
with the remote controller headed towards the indoor unit.
Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
Release the failure mode recall function according to "Releasing the failure mode recall function"
mentioned above.
Operational procedure
Yes
(Blinks)
No
(OFF)
NOTE: 1. Make sure to release the failure mode recall function after it is 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.
2. Blinking pattern when the indoor unit is abnormal:
3.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 0.5-
second interval
No beep Beeps
Repeated cycle
2.5-second OFF 3-second ON
Blinking at 0.5-
second interval
Repeated cycle
Beeps
1 Regardless of normal or abnormal condition,
a short beep is emitted once the signal is re-
ceived.
E.g.: MSZ type
MSZ-GL18NA
MSY-GL18NA
MSZ-GL24NA
MSY-GL24NA
MSZ-GL06/09/12/15NA
MSY-GL09/12/15NA
OBH732C
25
2. Indoor unit failure mode table
Upper lamp of OP-
ERATION INDICA-
TOR lamp
Abnormal point
(Failure mode) Condition Remedy
Not lighted Normal — —
1-time ash every
0.5-second
Room temperature
thermistor
The room temperature thermistor short or
open circuit is detected every 8 seconds dur-
ing operation.
Refer to the characteristics of the room temperature
thermistor (9-7.).
2-time ash
2.5-second OFF
Indoor coil
thermistor
The indoor coil thermistor short or open circuit
is detected every 8 seconds during operation.
Refer to the characteristics of the main indoor coil ther-
mistor, the sub indoor coil thermistor (9-7.).
3-time ash
2.5-second OFF Serial signal The serial signal from outdoor unit is not re-
ceived for a maximum of 6 minutes.
Refer to 9-6. "How to check miswiring and serial
signal error".
11-time ash
2.5-second OFF Indoor fan motor
The rotational frequency feedback signal is
not emitted for 12 seconds after the indoor fan
motor is operated.
Refer to 9-6. "Check of indoor fan motor".
12-time ash
2.5-second OFF
Indoor control
system
It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.
Replace the indoor electronic control P.C. board.
NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (9-4.).
OBH732C
26
9-3. INSTRUCTION OF TROUBLESHOOTING
Indoor unit oper-
ates.
Outdoor unit
does not operate.
If blinking of OPERATION INDI-
CATOR lamp cannot be checked,
it can be checked with failure
mode recall function.
Indoor unit operates.
Outdoor unit does
not operate normally.
Indoor unit does
not receive the
signal from re-
mote controller.
OPERATION INDICATOR
lamp on the indoor unit is
ashing ON and OFF.
Outdoor unit
operates only
in Test Run
operation.
Outdoor unit
does not
operate even
in Test Run
operation.
Unit does not
operate nor-
mal operation
in COOL or
HEAT mode.
(MSZ)
Indoor unit
operates, when
EMERGENCY
OPERATION
switch is pressed.
Indoor unit does
not operate, when
EMERGENCY
OPERATION
switch is pressed.
Check room
temperature
thermistor.
Refer to 9-7.
"Test point
diagram and
voltage".
Refer to "How
to check
inverter/com-
pressor".
Refer to
"Check of R.V.
coil".
Refer to 9-6.
"Check of remote
controller and
indoor elec-
tronic control P.C.
board".
1. Check indoor/out-
door connecting wire.
(Check if the power is
supplied to the indoor
unit.)
2. Refer to 9-6. "Check
of indoor P.C. board
and indoor fan motor".
Upper lamp
Flash ON
and OFF at
0.5-second
intervals
Cause:
Indoor/Outdoor
unit
• Miswiring or
trouble of
serial signal.
Upper lamp
2-time ash
Cause:
Indoor unit
• Trouble
of room
temperature
/ indoor coil
thermistor.
Upper lamp
3-time ash
Cause:
Indoor unit
• Trouble of
indoor fan
motor.
Upper lamp
4-time ash
Cause:
Indoor unit
• Trouble
of indoor
unit control
system.
Upper lamp
5-time ash
Cause:
Outdoor unit
• Outdoor
power sys-
tem abnor-
mality.
Upper lamp
6-time ash
Cause:
Outdoor unit
• Trouble of
thermistor in
outdoor unit.
Upper lamp
7-time ash
Cause:
Outdoor unit
• Trouble of
outdoor con-
trol system.
Upper lamp
14-time ash
or more
Cause:
Outdoor unit
• Other ab-
normality
Start
Refer to 9-6.
"How to
check mis-
wiring and
serial signal
error".
Check room
temperature
thermistor
and indoor
coil thermis-
tor. Refer
to 9-7."Test
point diagram
and voltage".
Refer to 9-6.
"Check of
indoor fan
motor".
Replace the
indoor elec-
tronic control
P.C. board.
Refer to
"How to
check
inverter/com-
pressor".
Refer to
"Check of
outdoor ther-
mistors".
Replace the
inverter P.C.
board or
the outdoor
electronic
control P.C.
board.
Check "Flow
chart of the
detailed
outdoor unit
failure mode
recall func-
tion."
"Test Run operation" means the
operation within 30 minutes af-
ter EMERGENCY OPERATION
switch is pressed.
Refer to outdoor unit service manual.
OBH732C
27
9-4. TROUBLESHOOTING CHECK TABLE
Before taking measures, make sure that the symptom reappears for accurate troubleshooting.
When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the
power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes.
OPERATION INDICATOR
Lighted
Blinking
Not lighted
No. Abnormal
point Operation indicator lamp Symptom Condition Remedy
1
Miswiring
or serial
signal
Upper lamp ashes.
0.5-second ON
0.5-second OFF
Indoor unit and
outdoor unit do
not operate.
The serial signal from the outdoor unit is not
received for 6 minutes.
• Refer to 9-6. "How to check
miswiring and serial signal er-
ror".
2
Indoor coil
thermistor
Upper lamp ashes.
2-time ash
2.5-second OFF
The indoor coil or the room temperature ther-
mistor is short or open circuit.
• Refer to the characteristics of
indoor coil thermistor, and the
room temperature thermistor
(9-7.).
Room tem-
perature
thermistor
3Indoor fan
motor
Upper lamp ashes.
3-time ash
2.5-second OFF
The rotational frequency feedback signal is
not emitted during the indoor fan operation. • Refer to 9-6. "Check of in-
door fan motor".
4Indoor con-
trol system
Upper lamp ashes.
4-time ash
2.5-second OFF
It cannot properly read data in the nonvolatile
memory of the indoor electronic control P.C.
board.
• Replace the indoor electronic
control P.C. board.
5
Outdoor
power sys-
tem
Upper lamp ashes.
5-time ash
2.5-second OFF
It consecutively occurs 3 times that the com-
pressor stops for overcurrent protection or
startup failure protection within 1 minute after
startup.
• Refer to "How to check of in-
verter/compressor".
Refer to outdoor unit service
manual
• Check the stop valve.
6Outdoor
thermistors
Upper lamp ashes.
6-time ash
2.5-second OFF
The outdoor thermistors short or open circuit
during the compressor operation.
• Refer to "Check of outdoor
thermistor".
Refer to outdoor unit service
manual.
7
Outdoor
control sys-
tem
Upper lamp ashes.
7-time ash
2.5-second OFF
It cannot properly read data in the nonvolatile
memory of the inverter P.C. board or the out-
door electronic control P.C. board.
• Replace the inverter P.C. board
or the outdoor electronic control
P.C. board.
Refer to outdoor unit service
manual.
8Other ab-
normality
Upper lamp ashes.
14-time ash or more
2.5-second OFF
An abnormality other than above mentioned
is detected.
• Check the stop valve.
• Check the 4-way valve.
• Check the abnormality in detail
using the failure mode recall
function for outdoor unit.
9
Outdoor
control sys-
tem
Upper lamp lights up.
Outdoor unit
does not oper-
ate
It cannot properly read data in the nonvolatile
memory of the inverter P.C. board or the out-
door electronic control P.C. board.
• Check the blinking pattern of
the LED on the inverter P.C.
board or the outdoor electronic
control P.C. board.
OBH732C
28
OPERATION INDICATOR
No. Abnormal
point Operation indicator lamp Symptom Condition Remedy
1
MXZ type
Operation
mode
setting
Upper lamp lights and lower lamp ashes.
2.5-second OFF
Outdoor unit
operates but
indoor unit does
not operate.
The operation mode of the each indoor unit
is differently set to COOL (includes DRY) and
HEAT at the same time, the operation mode
of the indoor unit that has operated at rst has
the priority.
• Unify the operation mode.
Refer to outdoor unit service
manual.
9-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA MSZ-GL18NA MSZ-GL24NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA MSY-GL18NA MSY-GL24NA
Part name Check method and criterion Figure
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Measure the resistance with a tester.
Refer to 9-7. "Test point diagram and voltage", 1 or 2. "Indoor electronic
control P.C. board", for the chart of thermistor.
Indoor fan motor (MF) Check 9-6.
MSZ-GL06/09/12/15NA
MSY-GL09/12/15NA
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(Temperature: 50 - 86°F (10 - 30°C))
Color of the lead wire Normal
RED - BLK 223 - 268 Ω
MSZ-GL18/24NA
MSY-GL18/24NA
Horizontal vane motor
(MV1)
Vertical vane motor
(MV2)
Measure the resistance between the terminals with a tester.
(Part temperature 50 ~ 86°F (10 ~ 30°C))
Color of the lead wire Normal
MSZ-GL18NA
Horizontal vane motor (MV1) RED-BLK 223 - 268 Ω
Vertical vane motor (MV2) 219 - 273 Ω
Color of the lead wire Normal
MSZ-GL24NA
Horizontal vane motor (MV1) RED-BLK 313 - 375 Ω
Vertical vane motor (MV2) 268 - 322 Ω
BLK
BLK
RED
BLK BLK
ROTOR
BLK
BLK
RED
BLK BLK
OBH732C
29
A Check of indoor fan motor
9-6. TROUBLESHOOTING FLOW
The indoor fan motor error has occurred, and the indoor fan does not operate.
Turn OFF the power supply.
Is there any foreign matter that interferes
the rotation of the line ow fan?
Yes
No
Remove the foreign matter and
adjust the line ow fan.
Pay enough attention to the high voltage on the fan motor connector.
Turn ON the power supply, wait 5 seconds or more, and then press
EMERGENCY OPERATION switch.
Measure the supply voltage as follows within 12 seconds after EMER-
GENCY OPERATION switch is pressed.
If more than 12 seconds passes, turn OFF the power supply and turn it
ON again, then measure the voltage.
<Indoor power P.C. board>
1. Measure the voltage between CN211 (+) and (–).
2. Measure the voltage between CN211 (+) and (–).
<Indoor electronic control P.C. board>
3. Measure the voltage between CN10A (+) ( )/ MSZ-GL06/09/12/15NA
(+) ( ) and JPG(GND)(–).MSZ-GL18NA
If more than 12 seconds passes after EMERGENCY OPERATION switch
is pressed, the voltage measured at 2. above goes 0 VDC although the
indoor P.C. board is normal.
Does the voltage between CN211
(+) and (–) on the power P.C. board
rise to the range of 3 to 6 VDC within
12 seconds after EMERGENCY
OPERATION switch is pressed?
Replace the indoor fan motor.
Yes
No
The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3 times, and then stops.
Measure the voltage between CN211
(+) and (–) while the fan motor is
rotating.
Replace the indoor power
P.C. board and the indoor
terminal P.C. board.
Is it unchanged holding
0 or 15 VDC? No
(Changed)
Yes
(Unchanged)
Measure the voltage CN10A (+) (MSZ-
GL06/09/12/15NA)/ ( ) (+) and MSZ-GL18NA
JPG (GND)(–) on the indoor electronic control
P.C. board when the fan motor is rotating.
Replace the indoor fan motor.
Is there 294/325 VDC
between CN211 (+)
and (–) ? Yes
Does the voltage between CN10A
(+) ( )/ MSZ-GL06/09/12/15NA
(+) ( ) and JPG (GND)MSZ-GL18NA
(–) on the indoor electronic control
P.C. board fall to 2 V or less within
12 seconds after EMERGENCY
OPERATION switch is pressed?
Replace the indoor electronic
control P.C. board.
NoYes
Replace the indoor power P.C.
board and the indoor terminal P.C.
board ( ).MSZ-GL06/09/12/15NA
Is it unchanged holding 0
or 5 VDC? No
(Changed)
Yes
(Unchanged)
Replace the indoor
electronic control P.C.
board.
No
MSZ-GL06/09/12/15/18NA
MSY-GL09/12/15/18NA
OBH732C
30
MSZ-GL24NA
MSY-GL24NA
The indoor fan motor error has occurred, and the indoor fan does not operate.
Turn OFF the power supply.
Is there any foreign matter that interferes
the rotation of the line ow fan?
Yes
No
Remove the foreign matter and
adjust the line ow fan.
Pay enough attention to the high voltage on the fan motor connector.
Turn ON the power supply, wait 5 seconds or more, and then press
EMERGENCY OPERATION switch.
Measure the supply voltage as follows within 12 seconds after EMER-
GENCY OPERATION switch is pressed.
If more than 12 seconds passes, turn OFF the power supply and turn it
ON again, then measure the voltage.
<Indoor electronic control P.C. board>
1. Measure the voltage between CN211 (+) and (–).
2. Measure the voltage between CN211 (+) and (–).
If more than 12 seconds passes after EMERGENCY OPERATION switch
is pressed, the voltage measured at 2. above goes 0 V DC although the
indoor P.C. board is normal.
Does the voltage between CN211
(+) and (–) on the indoor electronic
control P.C. board rise to the range
of 3 to 6 VDC within 12 seconds after
EMERGENCY OPERATION switch is
pressed?
Replace the indoor fan motor.
Yes
The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3 times, and then stops.
Measure the voltage between CN211
(+) and (–) while the fan motor is
rotating.
Replace the indoor electronic control P.C.
board and the indoor terminal P.C. board.
Is it unchanged holding
0 or 15 VDC? No
(Changed)
Yes
(Unchanged)
Replace the indoor fan motor.
Is there 294/325 VDC
between CN211 (+)
and (–) ? Yes
Replace the indoor
electronic control P.C.
board.
No
No
Replace the indoor electronic control
P.C. board.
OBH732C
31
B Check of remote controller and indoor electronic control P.C. board
Check if the remote controller is exclusive for this air conditioner.
Does the unit operate with the remote
controller?
OK
Yes
No
(Not clear)
Replace the batteries. (Refer to 9-1.4.)
Press STOP/OPERATE (OFF/ON)
button on the remote controller.
Is LCD display on the remote controller
visible?
Remove the batteries, then set them back
and press RESET button. (Refer to 9-1.4.)
Check if the unit operates with the remote
controller.
Yes
No
Turn ON a radio to AM and press STOP/
OPERATE (OFF/ON) button on the remote
controller. 1
Is noise heard from radio?
Yes
No Replace the remote controller.
Are there any uorescent lights of
inverter or rapid-start type within the
range of 3.28 ft.(1m)? 2Yes
No
• Reinstall the unit away from lights.
• Attach a lter on receiving part.
Replace the indoor electronic control
P.C. board. (Including the receiver)
MSZ-GL24NA
MSY-GL24NA
Does the unit operate with the remote
controller?
OK
Yes
No
(Not clear)
Replace the batteries. (Refer to 9-1.4.)
Press STOP/OPERATE (OFF/ON)
button on the remote controller.
Is LCD display on the remote controller
visible?
Remove the batteries, then set them back
and press RESET button. (Refer to 9-1.4.)
Check if the unit operates with the remote
controller.
Yes
No
Turn ON a radio to AM and press STOP/
OPERATE (OFF/ON) button on the remote
controller. 1
Is noise heard from radio?
Yes
No Replace the remote controller.
Are there any uorescent lights of
inverter or rapid-start type within the
range of 3.28 ft.(1m)? 2Yes
No
• Reinstall the unit away from lights.
• Attach a lter on receiving part.
Measure the voltage between power moni-
tor receiver SW P.C. board connector CN20A
No.2(+) and No.3(-) when the remote controller
button is pressed. (Refer to 9-7.5.)
Is the voltage approximately 4 VDC?
No
Yes
Replace indoor electronic control P.C.
board.
Replace power monitor receiver SW P.C. board.
1 Look at the image of the signal transmitting section of
the remote controller through the monitor of a digital
camera or a camera phone. It is normal if the LED of
the signal transmitting section lights up when the STOP/
OPERATE (OFF/ON) button on the remote control-
ler is pressed. However, it may be difcult to see the
illuminated LED of the signal transmitting section with a
smartphone camera.
2 If the inverter uorescent light is turned on when the
room is cool, the unit may have difculty receiving the
signal from the remote controller or may not be able to
operate with it; if the inverter uorescent light is turned
on when the room is warm, the unit may be able to
operate with the remote controller.
1 Look at the image of the signal transmitting section of
the remote controller through the monitor of a digital
camera or a camera phone. It is normal if the LED of
the signal transmitting section lights up when the STOP/
OPERATE (OFF/ON) button on the remote control-
ler is pressed. However, it may be difcult to see the
illuminated LED of the signal transmitting section with a
smartphone camera.
2 If the inverter uorescent light is turned on when the
room is cool, the unit may have difculty receiving the
signal from the remote controller or may not be able to
operate with it; if the inverter uorescent light is turned
on when the room is warm, the unit may be able to
operate with the remote controller.
MSZ-GL06/09/12/15/18NA
MSY-GL09/12/15/18NA
OBH732C
32
C Check of indoor P.C. board and indoor fan motor
MSZ-GL06/09/12/15NA
MSY-GL09/12/15NA
Turn OFF the power supply.
Remove indoor fan motor connector CN211
from indoor power P.C. board and vane
motor connector CN151 from the indoor
electronic control P.C. board and turn ON
the power supply.
Does the unit operate with the remote
controller?
Does OPERATION INDICATOR lamp light
up by pressing EMERGENCY OPERATION
switch?
Yes
No
Measure the resistance of indoor fan
motor.
(Refer to 9-6 .)
Short circuit:
Replace the indoor fan motor.
Turn OFF the power supply.
Check both “parts side” and “pat-
tern side” of the indoor terminal P.C.
board visually.
Replace the varistor (NR11)
and fuse (F11). 3
Are the varistor (NR11)
burnt and the fuse (F11)
blown? No
No
Yes
Yes
Be sure to check both the fuse
and the varistor in any case.
Is the fuse (F11) blown
only?
Measure the resistance between
CN211 (+) and (-) of indoor fan
motor connector. 1, 2
Yes
Is the resistance 1MΩ or more? Replace the fuse (F11) and the
indoor fan motor. 3
No
Replace the fuse (F11). 3
Measure the resistance of resistor
(R111) on the indoor power P.C.
board.
No
Is the resistance of
resistor (R111) approxi-
mately 4 Ω? No
Replace the indoor
power P.C. board, the
indoor terminal P.C.
board and the indoor fan
motor.
Replace the indoor electronic control P.C. board.
Measure the resistance of the vane
motor coil.
(Refer to 9-5.)
Short circuit:
Replace the vane motor and the indoor
electronic control P.C. board.
1. The fan motor connector's lead wire is red,
whereas is black.
2. Connect "+" of the tester to fan motor connector's
lead wire, and “-” to lead wire, otherwise the
resistance cannot be measured properly.
3. Please replace the fuse after removing the indoor
terminal P.C. board from the electrical box.
Is there approximately 5 VDC between
5 V (+) and JPG (GND) (-) of the
indoor electronic control P.C. board?
Is there approximately 9 to 13 VDC
between 12 V (+) and JPG (GND) (-)
of the indoor electronic control P.C.
board?
Are connector CN10A on the
indoor electronic control P.C.
board or lead wires discon-
nected?
Yes Replace the indoor fan motor.
Yes
Connect the connector or repair
disconnection.
Yes
No
JPN (GND)
CN10A
12 VDC
5 VDC
Indoor electronic control
P.C. board
Indoor power P.C. board
R111
CN211
Indoor terminal
P.C. board
Fuse
(F11)
Varistor
(NR11)
OBH732C
33
MSZ-GL18NA
MSY-GL18NA
Turn OFF the power supply.
Remove indoor fan motor connector CN211
from indoor power P.C. board and vane
motor connector CN151 from the indoor
electronic control P.C. board and turn ON
the power supply.
Does the unit operate with the remote
controller?
Does OPERATION INDICATOR lamp light
up by pressing EMERGENCY OPERATION
switch?
Yes
No
Measure the resistance of indoor fan
motor.
(Refer to 9-6
.)
Short/ open circuit:
Replace the indoor fan motor.
Turn OFF the power supply.
Check both “parts side” and “pattern
side” of the indoor power P.C. board
visually.
Replace the varistor (NR11)
and fuse (F11). 3
Is the varistor (NR11)
burnt and the fuse (F11)
blown? No
No
Yes
Yes
Be sure to check both the fuse
and the varistor in any case.
Is the fuse (F11) blown
only?
Measure the resistance between
CN211 (+) and (-) of indoor fan
motor connector. 1, 2
Yes
Is the resistance 1MΩ or more? Replace the fuse (F11) and the
indoor fan motor. 3
No
Replace the fuse (F11). 3
Measure the resistance of resistor (R111)
on the indoor power P.C. board.
No
No
Replace the indoor
power P.C. board and
the indoor fan motor.
Replace the indoor electronic control P.C. board.
Measure the resistance of the vane
motor coil.
(Refer to 9-5.)
Short/ open circuit:
Replace the vane motor and the indoor
electronic control P.C. board.
1. The fan motor connector's lead wire is red,
whereas is black.
2. Connect "+" of the tester to fan motor
connector's lead wire, and “-” to lead wire,
otherwise the resistance cannot be measured
properly.
3. Please replace the fuse after removing the
indoor power P.C. board from the electrical
box.
Is there approximately 5 VDC between
5 V (+) and GND (-) of the indoor
electronic control P.C. board? Is there
approximately 9 V to 13 VDC between
12 V (+) and GND (-) of the indoor
electronic control P.C. board?
Is the connector CN10A on
the indoor electronic control
P.C. board or lead wires
disconnected?
Yes Replace the indoor fan motor.
Yes
Connect the connector CN10A or repair
disconnection.
No
Indoor electronic control
P.C. board
GND
CN10A
12 VDC 5 VDC
Indoor power P.C. board
CN211
R111
Is there resistance of resistor
(R111) approximately 4 Ω?
Yes
With a tester, check the
continuity between the
connector CN201 on the
indoor control P.C. board and
S2 on the terminal block.
Is electricity
conducted? (The
resistance is 0 Ω .)
Yes
No
The thermal fuse connected
to the terminal block has
failed.
Replace the terminal block
assembly.
OBH732C
34
CN211
R111
Indoor electronic
control P.C. board
Indoor terminal
P.C. board
Fuse
(F11)
Varistor
(NR11)
Yes
No
1. The fan motor connector's lead wire is red, whereas is black.
2. Connect "+" of the tester to fan motor connector's lead
wire, and "-" to lead wire, otherwise the resistance cannot be
measured properly.
3. Please replace the fuse after removing the indoor terminal
P.C. board from the electrical box.
Yes
No
Does the unit operate with the remote controller?
Does OPERATION INDICATOR lamp light up by
pressing EMERGENCY
OPERATION switch?
Turn OFF the power supply.
Remove indoor fan motor connector CN211 and vane motor
connectors CN151 and CN152 from the indoor electronic
control P.C. board and turn ON the power supply.
Measure the resistance of the horizontal vane
motor coil.
(Refer to 9-5.)
Measure the resistance between CN211
and of the indoor fan motor connector.
Short/ open circuit:
Replace the indoor fan motor.
Short/ open circuit:
Replace the horizontal vane motor and the indoor
electronic control P.C. board.
Turn OFF the power supply.
Check both “parts side” and “pattern
side” of the indoor electronic control P.C.
board visually.
Replace the varistor (NR11) and fuse (F11). 3
Are the varistor (NR11) burnt
and the fuse (F11) blown?
Be sure to check both the fuse
and the varistor in any case.
No
Yes
No
Is the fuse (F11) blown only?
Yes
No
Is the resistance 1MΩ
or more?
Measure the resistance between
CN211 (+) and (-) of the indoor
fan motor connector. 1, 2
Replace the fuse (F11). 3
Replace the fuse (F11) and the indoor fan motor. 3
Is the resistance
approximately 4 ?Ω
Measure the resistance of cement
resistor R111 on the indoor electronic
control P.C. board.
Replace the indoor electronic control P.C. board.
Replace the indoor electronic control P.C. board
and the indoor fan motor.
Yes
MSZ-GL24NA
MSY-GL24NA
OBH732C
35
D How to check miswiring and serial signal error
• Turn OFF inverter-controlled lighting
equipment.
• Turn OFF the power supply and then
turn ON again.
• Press EMERGENCY OPERATION
switch.
A
Is serial signal
error indicated 6
minutes later?
B
Yes
• Reinstall
either the unit
or the light
away from
each other.
• Attach a lter
on remote
control receiv-
ing section
of the indoor
unit.
No
Replace the indoor power
P.C. board and the indoor
terminal P.C. board
Turn OFF the power supply.
Is there rated voltage in the power supply?
Yes No
Turn ON the power supply.
Check the power supply.
Is there rated voltage between outdoor terminal block S1 and S2? No Check the wiring.
Press EMERGENCY OPERATION switch once.
Does the OPERATION INDICATOR lamp light
up? <Conrmation of the power to the indoor
unit> No
Is serial signal error indicated 6 minutes later?
Yes
No
Is there any miswiring, poor
contact, or wire disconnec-
tion of the indoor/outdoor
connecting wire?
Yes Correct them.
No
A
Turn OFF the power supply.
Check once more if the indoor/outdoor
connecting wire is not miswiring.
Bridge the outdoor terminal block S2 and
S3. 1
B
1. Miswiring may damage indoor electronic control P.C.
board during the operation.
Be sure to conrm the wiring is correct before the opera-
tion starts.
Turn ON the power supply.
Does the LED on the inverter P.C. board or the outdoor electronic control P.C.
board repeat "3.6-second-OFF and 0.8-second-ON quick blinking"? 3
Yes
No
(Lighted
or not
lighted)
Replace the inverter P.C. board or the outdoor
electronic control P.C. board. 2
2. Be careful of the residual voltage of smoothing
capacitor.
Is there amplitude of 10 to 20 VDC between indoor terminal block S2
and S3? <Conrmation of serial signal>
Yes
Check the wiring
If there are any error of the indoor/outdoor connecting wire:
such as the damage of the wire, intermediate connection,
and/or poor contact to the terminal block, replace the indoor/
outdoor connecting wire.
No
Is there 2 VDC or less between CN10A (+)
and JPG (GND)(-) on the indoor electronic
control P.C. board?
NoYes
3. Be sure to check this within 3 minutes after turning ON.
After 3 minutes, LED blinks 6 times. Even when the
inverter P.C. board or the outdoor electronic control P.C.
board is normal, LED blinks 6 times after 3 minutes.
(Except for outdoor unit of multi system type)
Is there 2 VDC or less between
CN10A (+) and JPG (GND)(-) on
the indoor electronic control P.C.
board?
Is there 2 VDC or less between
CN10A (+) and JPG (GND)(-) on
the indoor electronic control P.C.
board?
Replace the indoor elec-
tronic control P.C. board.
No NoYes
Yes
Is the bus-bar voltage of the inverter P.C. board or the outdoor electronic control P.C. board normal? (Refer
to "TEST POINT DIAGRAM AND VOLTAGE" in the outdoor service manual.) No
Yes
Check of power supply.
(Refer to the outdoor
service manual.)
Turn OFF the power supply.
Remove the bridge between outdoor terminal block S2 and S3.
Turn ON the power supply.
Is there rated voltage between indoor terminal block S1 and S2?
<Conrmation of power voltage>
Yes
No
Yes
Yes
MSZ-GL06/09/12/15NA
MSY-GL09/12/15NA
OBH732C
36
• Turn OFF inverter-controlled lighting
equipment.
• Turn OFF the power supply and then
turn ON again.
• Press EMERGENCY OPERATION
switch.
A
Is serial signal
error indicated 6
minutes later?
B
Yes
• Reinstall
either the unit
or the light
away from
each other.
• Attach a lter
on remote
control receiv-
ing section
of the indoor
unit.
No
Turn OFF the power supply.
Is there rated voltage in the power supply?
Yes No
Turn ON the power supply.
Check the power supply.
Is there rated voltage between outdoor terminal block S1 and S2? No Check the wiring.
Press EMERGENCY OPERATION switch once.
Does the OPERATION INDICATOR lamp light
up? <Conrmation of the power to the indoor
unit>
Yes
No
Is serial signal error indicated 6 minutes
later?
Yes
No
Is there any miswiring,
poor contact, or wire
disconnection of the
indoor/outdoor connect-
ing wire?
Yes Correct them.
No
A
Turn OFF the power supply.
Check once more if the indoor/outdoor
connecting wire is not miswiring.
Bridge the outdoor terminal block S2 and
S3. 1
B
1. Miswiring may damage indoor electronic control P.C.
board during the operation.
Be sure to conrm the wiring is correct before the opera-
tion starts.
Turn ON the power supply.
Does the LED on the inverter P.C. board or the outdoor electronic control P.C.
board repeat "3.6-second-OFF and 0.8-second-ON quick blinking"? 3
Yes
GL24GL18
No
(Lighted
or not
lighted)
Replace the inverter P.C. board or the outdoor
electronic control P.C. board. 2
2. Be careful of the residual voltage of smoothing
capacitor.
Turn OFF the power supply.
Remove the bridge between outdoor terminal block S2 and S3.
Yes
3. Be sure to check this within 3 minutes after turning ON.
After 3 minutes, LED blinks 6 times. Even when the
inverter P.C. board or the outdoor electronic control P.C.
board is normal, LED blinks 6 times after 3 minutes.
(Except for outdoor unit of multi system type)
Is the bus-bar voltage of the inverter P.C. board or the outdoor electronic control P.C. board normal? (Refer
to "TEST POINT DIAGRAM AND VOLTAGE" in the outdoor service manual.) No
Yes
Replace the indoor electronic control P.C. board.Turn on the power supply.
Is there amplitude of 10 to 20 VDC between the indoor terminal block
S2 and S3? <Conrmation of serial signal>
Yes
Is there 2 VDC or less between CN10A (+)
and GND (-) on the indoor electronic control
P.C. board?
No
Yes
Is there 2 VDC or less between
CN10A (+) and GND (-) on
the indoor electronic control P.C.
board?
Is there 2 VDC or less between
CN10A (+) and GND (-) on
the indoor electronic control P.C.
board?
Replace the indoor elec-
tronic control P.C. board.
No NoYes
Yes
No
Replace the indoor power
P.C. board.
MSZ-GL18/24NA
MSY-GL18/24NA
OBH732C
39
3. Indoor power P.C. board
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
Temperature (°F)
Resistance (kΩ)
32 50 68 86 104 122 140
MSZ-GL18NA MSY-GL18NA
12V
GND
5V
Fuse (F11)
T3.15AL250V
Varistor (NR11)
Connector to indoor electronic
control P.C. board (CN20A) 5 VDC
12 VDC
GND
Connector to Indoor fan
motor (CN211) Resistor (R111)
Connector to
Terminal block
(CN201)
(+)3-6 VDC
15 VDC
(-) GND (High
voltage DC)
294/325 VDC (+)0 or 15 VDC
Timer short
mode point
(Refer to 7-1.)
Room temperature thermistor RT11 (CN111)
Connector to
Indoor coil ther-
mistor RT12,
RT13 (CN112)
Vane motor
(CN151)
Connector to indoor power
P.C. board (CN10A)
5V DC
To disable
"Auto restart
function",cut the
Jumper wire to
JR77. (Refer to
7-3.)
Emergency
operation
switch (SW1)
GND
4. Indoor electronic control P.C. board
12V DC
OBH732C
40
MSZ-GL24NA MSY-GL24NA
5. Indoor terminal P.C. board, Indoor electronic control P.C. board, Power monitor receiver SW P.C. board
Room temperature thermistor (RT11)
Indoor coil thermistor (RT12, RT13)
Temperature (°F)
Resistance (kΩ)
32 50 68 86 104 122 140
Please replace the fuse after removing the indoor terminal P.C. board from the electrical box.
Indoor terminal P.C. board Indoor electronic control P.C. board
Power monitor receiver SW P.C. board
Fuse
(F11)( )
Varistor
(NR11)
Terminal
block
Indoor fan motor
(CN211)
325 VDC
(–) GND
(high-voltage DC)
15 VDC
(+)3-6 VDC
(+)0 or 15 VDC
Resistor
(R111)
Emergency
operation switch
(SW1)
To disable "Auto restart func-
tion" cut the Jumper wire to
JR77. (Refer to 7-3.)
Timer short mode point
(Refer to 7-1.)
Vane motor
(CN151,CN152)
5 VDC
12 VDC
Room
temperature
thermistor RT11
(CN111)
Indoor coil thermistor
RT12, RT13 (CN112)
OBH732C
10-1. MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA
MSY-GL09NA MSY-GL12NA MSY-GL15NA
NOTE: Turn OFF the power supply before disassembly.
OPERATING PROCEDURE PHOTOS
1. Removing the panel
(1) Remove the horizontal vanes.
(2) Remove the screw caps of the panel. Remove the
screws of the panel.
(3) Unhook the lower part ( ) of the panel.
(4) Hold the lower part of both ends of the panel and pull
it slightly toward you, and then remove the panel by
pushing it upward.
Photo 1
Screws of the panel
Front panel
Horizontal vanes
A
41
(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the
locking mechanism.
Slide the sleeve.
Pull the terminal while
pushing the locking
lever.
Hold the sleeve, and
pull out the terminal
slowly.
Connector
Sleeve
Locking lever
<"Terminal with locking mechanism" Detaching points>
The terminal which has the locking mechanism can be detached as shown below.
There are 2 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.
DISASSEMBLY INSTRUCTIONS
10
OBH732C
OPERATING PROCEDURE PHOTOS
2. Removing the indoor electronic control P.C.
board and the room temperature thermistor
(1) Remove the panel (Refer to 1.) and the corner box.
(2) Remove the screw of the V.A. clamp and the V.A.
clamp.
(3) Loosen the screw of the indoor/outdoor connecting
wire and remove the indoor/outdoor connecting wire.
(4) Remove the screw of the electrical cover and the
electrical cover.
(5) Open the indoor electronic control P.C. board holder (to
right side)
(6) Disconnect the following connectors:
<Indoor electronic control P.C. board>
CN112 (Indoor coil thermistor)
CN151 (Vane motor)
CN10A (To the indoor power P.C. board)
(7) Unhook the catches of the indoor electronic control
P.C. board holder from the nozzle and the electrical
box (right side).
(8) Remove the indoor electronic control P.C. board hold-
er from the conduit cover.
(9) Remove the room temperature thermistor from the
hook of the indoor electronic control P.C. board hold-
er.
(10)
Open the back side of the indoor electronic control P.C.
board holder, and remove the indoor electronic con-
trol P.C. board.
(11)
Remove the room temperature thermistor from the
indoor electronic control P.C. board.
Photo 2
Photo 3
Photo 4
3. Removing the indoor power P.C. board, the
indoor terminal P.C. board, and the electrical
box
(1) Remove the panel (Refer to 1.) and the corner box.
(2) Remove the indoor/outdoor connecting wire and the
indoor electric control P.C. board holder. (Refer to 2
(2)-(8).).
(3) Remove the screw of the conduit cover and the con-
duit cover.
(4) Remove the screw of the conduit plate and the con-
duit plate.
(5) Remove the ground wire connected to the indoor heat
exchanger from the electrical box.
(6) Remove the screw fixing the electrical box.
(7) Unhook first the lower, then the upper catches of the
electrical box, and pull out the electrical box.
(8) Disconnect all the connectors on the indoor power P.C.
board and unhook all lead wires.
(9) Remove the screw of terminal block on the indoor ter-
minal P.C. board.
(10)
Remove the indoor power P.C. board and the indoor
terminal P.C. board.
Lower catch
Indoor terminal
P.C. board
Terminal block
Indoor power
P.C. board
Screw of the
electrical box
Catch of indoor electronic
control P.C. board holder
Upper catch
Screw of the
V.A. clamp
Indoor electronic
control
P.C. board holder
Screw of the
electrical cover
Catch of indoor electronic
control P.C. board holder
Electrical box
Ground wire
Screw of the
conduit plate
Screw of the
conduit cover
42
OBH732C
OPERATING PROCEDURE PHOTOS
4. Removing the nozzle assembly
(1) Remove the panel (Refer to 1.) and the corner box.
(2) Remove the indoor/outdoor connecting wire (Refer to
2 (2)-(7).).
(3) Remove the indoor electronic control P.C. board hold-
er.
(4) Pull out the drain hose from the nozzle assembly and
remove the nozzle assembly.
Photo 5
5. Removing the horizontal vane motor
(1) Remove the nozzle assembly. (Refer to 5.)
(2) Remove the screws of the horizontal vane motor unit.
(3) Disconnect the connector from the horizontal vane
motor.
(4) Remove the screws of the horizontal vane motor.
(5) Remove the horizontal vane motor from the horizontal
vane motor unit.
Screws of horizontal vane motor unit
43
OBH732C
OPERATING PROCEDURE PHOTOS
6. Removing the indoor fan motor, the indoor coil
thermistor, and the line flow fan
(1) Remove the panel (Refer to 1.) and the corner box.
(2) Remove the indoor electronic control P.C. board hold-
er, the electrical box and the nozzle assembly.
(3) Remove the screws fixing the motor bed.
(4) Loosen the screw fixing the line flow fan.
(5) Remove the motor bed together with fan motor and
motor band.
(6) Release the hooks of the motor band. Remove the
motor band. Pull out the indoor fan motor.
(8) Remove the indoor coil thermistor from the heat
exchanger.
( ) Install the indoor coil thermistor in its former position
when assembling it. (Refer to Photo 9)
(9) Remove the screws fixing the left side of the heat
exchanger.
(10)
Lift the heat exchanger, and pull out the line flow fan
to the lower-left.
When attaching the line flow fan, screw the line flow
fan so 5/32 inch (4 mm) gap is provided between the
right end of the line flow fan and the right wall of the
air passage of the box (Figure 1).
Photo 6
Photo 7
Photo 8
Photo 9
Screw of the line flow fan
Screws of the
motor bed
Screws of the
left side of the
heat exchanger
Motor band
Indoor coil
thermistor(sub)
RT13
Indoor coil
thermistor(main)
RT12
Figure 1
5/32 inch
(4 mm)
44
OBH732C
OPERATING PROCEDURE PHOTOS
2. Removing the indoor power P.C. board and the
electrical box
(1) Remove the panel. (Refer to 1.) Remove the right cor-
ner box.
(2) Disconnect the following connectors:
<Indoor electronic control P.C. board>
CN151 (Vane motor)
CN112 (Indoor coil thermistor)
CN10A (To the indoor power P.C. board)
(3) Unhook the catch on the left side of the control P.C.
board holder. Pull the control P.C. board holder as if
opening the door at 90 degrees. Remove the control P.C.
board holder from the axial rod on the electrical box.
(4) Remove the screw of the V.A. clamp.
(5) Remove the V.A. clamp and the indoor/outdoor con-
necting wire.
(6) Remove the screw of the conduit cover and the conduit
cover.
(7) Remove the screw of the conduit plate and the conduit
plate.
(8) Remove the screw fixing the electrical box.
(9) Remove the screws of the ground plate. (Photo 2)
(10)
Remove the indoor coil thermistor from the water cover.
(11)
Disengage the hooks of the water cover and remove
the water cover.
(12)
Remove the screw of the electrical cover and remove
the electrical cover.
(13)
Disconnect the CN211 (Indoor fan motor) from the
indoor power P.C. board.
(14)
Remove the upper catch of the electrical box, and pull
out the electrical box.
To attach the electrical box, pass the wires connecting
the indoor power P.C. board and the indoor electronic
control P.C. board through A. Pass the lead wires of the
fan motor through B as shown in the Photo 3.
(15)
Disconnect the following connectors.
<Indoor power P.C. board>
CN201 (Terminal block)
CN20A (To the indoor electronic control P.C. board)
46
Photo 2
Photo 3
Screw of the
V.A. clamp
Control P.C. board holder
Screw of the
electrical cover
Water cover
Indoor coil ther-
mistor connec-
tor CN112
Indoor coil ther-
mistor
Indoor electronic
control P.C. board
Vane motor
connector (CN151)
Screws of
the ground plate
Connector
CN10A
(To indoor power
P.C. board)
Photo 4
Screw of
the conduit
plate
Terminal block
connector CN201
Connector CN20A
(To indoor elec-
tronic P.C. board)
Indoor fan motor
connector CN211
Electrical box
Screw of the
electrical box
Screw of the
conduit cover
OBH732C
OPERATING PROCEDURE PHOTOS
3. Removing the indoor electronic control P.C.
board
(1) Remove the panel. (Refer to 1.) Remove the right corner
box.
(2) Disconnect the following connectors:
<Indoor electronic control P.C. board>
CN151 (Vane motor)
CN112 (Indoor coil thermistor)
CN10A (To the indoor power P.C. board)
(3) Unhook the catch on the left side of the control P.C.
board holder. Pull the control P.C. board holder as if
opening the door at 90 degrees. Remove the control P.C.
board holder from the axial rod on the electrical box.
(4) Remove the room temperature thermistor from the back
side of the control P.C. board holder.
(5) Unhook the catches of the control P.C. board holder, and
open the control P.C. board holder.
(6) Remove the indoor electronic control P.C. board from the
control P.C. board holder.
4. Removing the vane motor
(1) Remove the panel. (Refer to 1.) Remove the right cor-
ner box.
(2) Remove the control P.C. board holder, water cover and
the electrical box. (Refer to 2.)
(3) Pull out the drain hose from the nozzle assembly and
remove the nozzle assembly.
(4) Remove the screws of the vane motor and remove the
vane motor.
(5) Disconnect the connector from the vane motor.
47
Photo 6
Screws of the vane motor
Photo 5
Room temperature thermistor
Indoor electronic
control P.C. board
Catch
Catch
Control P.C. board holder (Inside)
Control P.C. board holder (Back side)
OBH732C
Termékspecifikációk
| Márka: | Mitsubishi |
| Kategória: | légkondicionáló |
| Modell: | MSY-GL09NA-U1 |
Szüksége van segítségre?
Ha segítségre van szüksége Mitsubishi MSY-GL09NA-U1, tegyen fel kérdést alább, és más felhasználók válaszolnak Önnek
Útmutatók légkondicionáló Mitsubishi
27 Március 2025
27 Március 2025
27 Március 2025
27 Március 2025
9 Január 2025
9 Január 2025
1 Január 2025
14 December 2024
14 December 2024
14 December 2024
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