Mitsubishi Electric MSZ-FT25VG-E1 User manual

INDOOR UNIT
PARTS CATALOG (OBB864)
CONTENTS
1. TECHNICAL CHANGES ······························2
2. PART NAMES AND FUNCTIONS··················3
3. SPECIFICATION ········································4
4. NOISE CRITERIA CURVES··························5
5. OUTLINES AND DIMENSIONS·····················6
6. WIRING DIAGRAM·····································7
7. REFRIGERANT SYSTEM DIAGRAM ··········· 10
8. SERVICE FUNCTIONS······························ 11
9. MICROPROCESSOR CONTROL ················ 13
10. TROUBLESHOOTING ······························· 22
11. DISASSEMBLY INSTRUCTIONS················· 36
SERVICE MANUAL
No. OBH864
Models
MSZ-FT25VG-E1 MSZ-FT25VGK -E1 , ET1 , SC1
MSZ-FT35VG -E1 MSZ-FT35VGK -E1 , ET1 , SC1
MSZ-FT50VG -E1 MSZ-FT50VGK -E1 , ET1 , SC1
Outdoor unit service manual
MUZ-FT∙VG Series (OBH865)

2
Use the specied 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.
TECHNICAL CHANGES
1
MSZ-FT25VG -E1
MSZ-FT35VG - E1
MSZ-FT50VG - E1
MSZ-FT25VGK -E1 , ET1 , SC1
MSZ-FT35VGK -E1 , ET1 , SC1
MSZ-FT50VGK -E1 , ET1 , SC1
1. New model
<Preparation before the repair service>
Prepare the proper tools.
Prepare the proper protectors.
Provide adequate ventilation.
After stopping the operation of the air conditioner, turn off the power-supply breaker and remove the power plug.
Discharge the capacitor before the work involving the electric parts.
<Precautions during the repair service>
Do not perform the work involving the electric parts with wet hands.
Do not pour water into the electric parts.
Do not touch the refrigerant.
Do not touch the hot or cold areas in the refrigeration cycle.
When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to
touch the live parts.
OBH864

3
Operation indicator lamp
Remote control receiving
section
Spec name plate
Horizontal vane
Air inlet
Air filter
(Air purifying
filter)
Air cleaning filter
(Silver-ionized
air purifier filter)
Front panel
Air outlet
Heat exchanger
Wi-Fi interface
Emergency operation switch
PART NAMES AND FUNCTIONS
2
MSZ-FT25VG MSZ-FT35VG MSZ-FT50VG
MSZ-FT25VGK MSZ-FT35VGK MSZ-FT50VGK
ACCESSORIES
Model
MSZ-FT25VG MSZ-FT25VGK
MSZ-FT35VG MSZ-FT35VGK
MSZ-FT50VG MSZ-FT50VGK
Installation plate 1
Installation plate xing screw 4 × 25 mm 5
Wireless remote controller 1
Felt tape (For left or left-rear piping) 1
Battery (AAA) for remote controller 2
Remote controller
OBH864

4
SPECIFICATION
3
Indoor model MSZ-FT25VG
MSZ-FT25VGK
MSZ-FT35VG
MSZ-FT35VGK
MSZ-FT50VG
MSZ-FT50VGK
Power supply Single phase 230 V, 50 Hz
Electrical data
Power input
1
Cooling W27 30 36
Heating 39 40 47
Running
current 1
Cooling A0.26 0.29 0.33
Heating 0.35 0.36 0.41
Fan motor
Model RC0J30-CV
Current 1Cooling A0.26 0.29 0.33
Heating 0.35 0.36 0.41
Dimensions W × H × D mm 838 × 280 × 229
Weight kg 10
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
738 786
High 624 642 720
Med. 492 498 588
Low 354 366 456
Super Low 234 330
Heating
Super High 792 882 930
High 720 810 864
Med. 540 612 684
Low 378 414 504
Super Low 234 330
Sound level
Cooling
Super High
dB(A)
46 47 48
High 41 42 45
Med. 36 40
Low 27 34
Super Low 19 28
Heating
Super High 49 52 54
High 46 49 51
Med. 39 42 45
Low 31 33 36
Super Low 19 28
Fan speed
Cooling
Super High
rpm
1,100 1,150
High 970 990 1,080
Med. 820 830 930
Low 660 670 780
Super Low 500 630
Heating
Super High 1,160 1,260 1,320
High 1,080 1,180 1,240
Med. 880 960 1,040
Low 690 730 840
Super Low 500 630
Fan speed regulator 5
Remote controller model E1 , ET1 : SH20E , SC1 : SH20D
NOTE: Test conditions are based on ISO 5151.
Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C
Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C
Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature 15°C
Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C
1 Measured under rated operating frequency.
Specifications and rated conditions of main electric parts
Model MSZ-FT25/35/50VG
MSZ-FT25/35/50VGK
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 V DC
Varistor
(NR11) 470 V
Terminal block (TB) 3P
OBH864

5
NOISE CRITERIA CURVES
4
MSZ-FT25VG
MSZ-FT25VGK
MSZ-FT35VG
MSZ-FT35VGK
MSZ-FT50VG
MSZ-FT50VGK
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
10
20
30
40
50
60
70
80
90
NC-20
NC-70
NC-60
NC-50
NC-40
NC-30
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
47
52
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
10
20
30
40
50
60
70
80
90
NC-20
NC-70
NC-60
NC-50
NC-40
NC-30
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
48
54
BAND CENTER FREQUENCIES, Hz
63 125 250 500 1000 2000 4000 8000
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
10
20
30
40
50
60
70
80
90
NC-20
NC-70
NC-60
NC-50
NC-40
NC-30
COOLING
FUNCTION SPL(dB(A)) LINE
HEATING
46
49
Test conditions
Cooling: Dry-bulb temperature 27°C
Wet-bulb temperature 19°C
Heating: Dry-bulb temperature 20°C
Wet-bulb temperature 15°C
INDOOR UNIT
WALL
MICROPHONE
0.8m
1m
OBH864

6
OUTLINES AND DIMENSIONS
5
Unit: mm
MSZ-FT25VG MSZ-FT35VG MSZ-FT50VG
MSZ-FT25VGK MSZ-FT35VGK MSZ-FT50VGK
OBH864

7
MSZ-FT25VG- E1
WIRING DIAGRAM
6
MSZ-FT35VG- E1 MSZ-FT50VG- E1
OBH864

8
MSZ-FT25VGK- E1 , SC1
MSZ-FT35VGK- E1 , SC1 MSZ-FT50VGK- E1 , SC1
OBH864

9
MSZ-FT25VGK- ET1
DIŞ
ÜNİTEYE
İÇ ÜNİTE
ELEKTRONİK
KONTROL KARTI
İÇ ÜNİTE
TERMİNAL KARTI
Wİ-Fİ ARAYÜZÜ
SİVİÇ/BUZZER
KARTI
GÖSTERGE
KARTI
ALICI KARTI
Terminal bloğu
Konektör
NOTLAR :
1. Dış ünite elektronik kablolamasıiçin dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme
kablosu kullanın
3. Sembolleri gösterir
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
RESİSTÖR
TERMİNAL BLOĞU
RÖLE(1C)
PARÇA ADI
KANAT MOTORU
(DİKEY)
KANAT MOTORU
(YATAY ALT)
KANAT MOTORU
(YATAY ÜST)
MSZ-FT35VGK- ET1 MSZ-FT50VGK- ET1
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
TERMİNAL BLOĞU
RÖLE(1C)
PARÇA ADI
KANAT MOTORU
(DİKEY)
KANAT MOTORU
(YATAY ALT)
KANAT MOTORU
(YATAY ÜST)
REAKTÖR
DIŞ
ÜNİTEYE
İÇ ÜNİTE
ELEKTRONİK
KONTROL KARTI
İÇ ÜNİTE
TERMİNAL KARTI
Wİ-Fİ ARAYÜZÜ
SİVİÇ/BUZZER
KARTI
GÖSTERGE
KARTI
ALICI KARTI
Terminal bloğu
Konektör
NOTLAR :
1. Dış ünite elektronik kablolamasıiçin dış ünite
elektronik kablo devre şemasını referans alınız.
2. Sadece bakır besleme
kablosu kullanın
3. Sembolleri gösterir
OBH864

10
REFRIGERANT SYSTEM DIAGRAM
7
Unit: mm
MSZ-FT25VG MSZ-FT35VG MSZ-FT50VG
MSZ-FT25VGK MSZ-FT35VGK MSZ-FT50VGK
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11 Flared connection
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Indoor coil
thermistor
RT13
Refrigerant flow in cooling
Refrigerant flow in heating
OBH864

11
SERVICE FUNCTIONS
8
MSZ-FT25VG MSZ-FT35VG MSZ-FT50VG
MSZ-FT25VGK MSZ-FT35VGK MSZ-FT50VGK
8-3. AUTO RESTART FUNCTION
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed
are memorized by the indoor electronic control P.C. board. “AUTO RESTART FUNCTION” automatically starts operation in
the same mode just before the shutoff of the main power.
Operation
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 disable “AUTO RESTART FUNCTION”
Turn off the main power for the unit.
Cut the jumper wire to JR77 on the indoor electronic control P.C. board. (Refer to 10-7.)
NOTE:
• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote
controller.
• If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is can-
celled.
• 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.
GND
INDOOR electronic control
P.C. board JR77
CN151
CN211 LD211
CN112
8-1. TIMER SHORT MODE
For service, the following set time can be shortened by bridging the timer short mode point on the electronic control P.C.
board. (Refer to 10-7.)
• 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 1
minute. Restarting the compressor, which takes 3 minutes, cannot be reduced.
8-2. HOW TO SET REMOTE CONTROLLER EXCLUSIVELY FOR A PARTICULAR INDOOR UNIT
A maximum of 4 indoor units with wireless remote controllers can be used in a room.
To operate the indoor units individually with each remote controller, assign a number to each remote controller according
to the number of the indoor unit.
This setting can be set only when all the following conditions are met:
• The remote controller is powered OFF.
• Weekly timer is not set.
• Weekly timer is not being edited.
(1) Hold down button on the remote controller for 2 seconds to enter the pairing mode.
(2) Press button again and assign a number to each remote controller.
Each press of button advances the number in the following order: 1 → 2 → 3 → 4.
(3) Press button to complete the pairing setting.
OBH864

12
• Ensure that the Router supports the WPA2-AES encryption setting before
starting the Wi-Fi interface setup.
• The End user should read and accept the terms and conditions of the Wi-Fi
service before using this Wi-Fi interface.
• To complete connection of this Wi-Fi interface to the Wi-Fi service, the Rout-
er may be required.
• This Wi-Fi interface will not commence transmission of any operational data
from the system until the End user registers and accepts the terms and con-
ditions of the Wi-Fi service.
• This Wi-Fi interface should not be installed and connected to any Mitsubishi
Electric system which is to provide application critical cooling or heating.
• At the time of relocation or disposal, reset the Wi-Fi interface to the factory
default.
ERR
NET
MODE
UNIT
RESET MODE
Wi-Fi INTERFACE
MODEL
XXXXXXXX
MAC
ID
SSID
KEY
: XXXXXXXXXXXX
: XXXXXXXXXX
: XXXXXXXXXXXX
: XXXXXXXXXXXX
VOLTAGE
CURRENT
:
:
MITSUBISHI ELECTRIC CORPRATION
WiFi.ASSY DWG No.
XXXXXXXXXXX
MADE IN CHINA
XXXXXXXXXX
>PP<
3
4
5
6
1
2
This Wi-Fi interface communicates the status information and controls
the commands from the MELCloud by connecting to an indoor unit.
(1) MODE switch
• The MODE switch is used for selecting modes in configurations.
(2) RESET switch
• Hold down the RESET switch for 2 seconds to reboot the system.
• Hold down the RESET switch for 14 seconds to initialize the Wi-Fi interface to
the factory default.
(1) Open the front panel and remove the Wi-Fi interface.
(2) Set up a connection between the Wi-Fi interface and the router.
Refer to the SETUP MANUAL and SETUP QUICK
REFERENCE GUIDE provided with the unit.
For SETUP MANUAL, please go to the website below.
http://www.melcloud.com/Support
(3) Put the Wi-Fi interface back and close the front panel
after the setup is completed.
(4) For MELCloud User Manual, please go to the website below.
http://www.melcloud.com/Support
NOTE:
Mitsubishi Electric’s Wi-Fi interface is designed for communication to Mit-
subishi Electric’s MELCloud Wi-Fi service.
Third party Wi-Fi interfaces cannot be connected to MELCloud.
Mitsubishi Electric is not responsible for any (i) under performance of a sys-
tem or any product;(ii) system or product fault; or (iii) loss or damage to any
system or product; which is caused by or arises from connection to and/or use
of any third party Wi-Fi interface or any third party Wi-Fi service with Mitsubishi
Electric equipment.
For the latest information regarding MELCloud from Mitsubishi Electric
Corporation, please visit www.MELCloud.com.
NOTE:
When the Wi-Fi interface is reset to the factory default, ALL t
he configuration
information will be lost. Take great care in implementing this operation.
No. Item Description
1 MODE switch It selects modes.
2 RESET switch It resets the system and ALL settings.
3 ERR LED (Orange) It shows the network error state.
4 NET LED (Green) It shows the network state.
5 MODE LED (Orange) It shows the Access point mode state.
6 UNIT LED (Green) It shows the indoor unit state.
W
i-Fi interface introduction
Wi-Fi interface
Front panel
Wi-Fi interface
Front panel
8-4. Wi-Fi INTERFACE SETTING UP (MSZ-FT·VGK)
8-5. CHANGING THE CORRECTION VALUE OF THE ROOM TEMPERATURE
Cut the jumper wire JR24 when the room temperature does not reach the set temperature during heating operation. (Refer
to 10-7.)
Cutting the jumper wire JR24 changes the correction value of the room temperature during heating operation from -2°C to
-5°C and lets the AUTO fan speed of the indoor unit and the compressor frequency increase easily.
JR24
CN151
INDOOR electronic control
P.C. board
CN211 LD211
CN112
GND
OBH864

13
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.
MICROPROCESSOR CONTROL
9
MSZ-FT25VG MSZ-FT35VG MSZ-FT50VG
MSZ-FT25VGK MSZ-FT35VGK MSZ-FT50VGK
Signal transmitting section
Operation display section
TEMPERATURE buttons
STOP/OPERATE
(OFF/ON) button
Indication of
remote controller
model is on back
Distance of signal : About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
FAN SPEED CONTROL button
OPERATION SELECT button
ECONO COOL button
POWERFUL button
CLOCK button
Lid
Slide the lid down
to open the remote
controller. Slide it down
further to get to the
weekly timer buttons.
WEEKLY TIMER
set buttons
TIME, TIMER set buttons
FORWARD button
BACKWARD button
RESET button
i-save button
NIGHT MODE button
VANE CONTROL button
WIDE VANE button
Signal transmitting section
Operation display section
TEMPERATURE buttons
STOP/OPERATE
(OFF/ON) button
Indication of
remote controller
model is on back
Distance of signal : About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
FAN SPEED CONTROL button
OPERATION SELECT button
POWERFUL button
CLOCK button
Lid
Slide the lid down
to open the remote
controller. Slide it down
further to get to the
weekly timer buttons.
WEEKLY TIMER
set buttons
TIME, TIMER set buttons
FORWARD button
BACKWARD button
RESET button
i-save button
NIGHT MODE button
VANE CONTROL button
WIDE VANE button
CIRCULATOR button
MSZ-FT25VG- E1 MSZ-FT25VGK- E1 MSZ-FT25VGK- ET1
MSZ-FT35VG- E1 MSZ-FT35VGK- E1 MSZ-FT35VGK- ET1
MSZ-FT50VG- E1 MSZ-FT50VGK- E1 MSZ-FT50VGK- ET1
MSZ-FT25VGK- SC1
MSZ-FT35VGK- SC1
MSZ-FT50VGK- SC1
OBH864

14
INDOOR UNIT DISPLAY SECTION
Lit
Blinking
Not lit
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 2°C or more away
from set temperature
The room temperature is
approaching the set tem-
perature
About 1 to 2°C from set
temperature
Standby mode
(Only during multi system
operation)
-
9-2. 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 COOL mode. (9-1.1.)
2. Low outside temperature operation
Low outside temperature operation works the same way as that in COOL mode. (9-1.2.)
3. Indoor fan speed control
Indoor fan speed control works the same way as that in COOL mode. (9-1.3.)
9-3. FAN ( ) OPERATION
(1) 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.
9-4. HEAT ( ) OPERATION
(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 TEMP or button to select the desired temperature. The setting range is 10 - 31°C.
9-1. 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 TEMP or button to select the desired temperature. The setting range is 16 - 31°C.
1. Coil frost prevention
The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the coil
from frosting.
When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works.
The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor
heat exchanger rises.
2. Low outside temperature operation
When the outside temperature is lower, low outside temperature operation starts, and the outdoor fan slows or stops.
3. Indoor fan speed control
When the thermostat turns OFF, the indoor fan operates very Low to reduce power consumption.
When the room temperature rises and the thermostat is ON, the indoor fan operates according to the settings on the
remote controller.
OBH864

15
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.
9-5. AUTO CHANGE OVER ∙∙∙ AUTO MODE OPERATION
Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation.
Mode selection
(1) Initial mode
When unit starts the operation with AUTO operation from OFF:
• If the room temperature is higher than the set temperature, operation starts in COOL mode.
• If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode.
(2) Mode change
COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 1°C below the
set temperature.
HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 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.
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, one for the cooling and the
others for heating, the operation mode of the indoor unit that operates first is selected. Other indoor units cannot
operate, and operation indicator lamp blinks 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 during defrosting of outdoor unit, it takes a few minutes (max. 10 minutes)
to blow out warm air.
• In the heating operation, though indoor unit is not operating, it may get warm or the sound of refrigerant flow may
be heard. It is not malfunction. The reason is that the refrigerant continuously flows into it.
OPERATION INDICATOR
Lit
Blinking
Not lit
OBH864

16
(5) STOP (operation OFF) and ON TIMER standby
In the following cases, the horizontal vane returns to the closed position.
(a) When OFF/ON (stop/operate) 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
If the lower position is selected during COOL/DRY, the vane automatically moves to the upward position after 0.5 to 1
hour to prevent any condensation from dripping.
9-6. 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.
(AUTO) (1) (2) (3) (4) (5) (SWING)
(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 starts.
(c) When standby mode (only during multi system operation) starts or finishes.
(4) VANE AUTO ( ) mode
In VANE AUTO mode, the microprocessor automatically determines the vane angle to make the optimum room tem-
perature distribution.
Horizontal
position
In COOL and DRY operation
Vane angle is fixed to Horizontal position.
In HEAT operation
Vane angle is fixed to Downward position.
(7) SWING ( ) mode
By selecting SWING mode with VANE control button, the horizontal vane swings vertically.
(8) ECONO COOL ( ) operation (ECONOmical operation)
When ECONO COOL button is pressed in COOL mode, set temperature and the air flow direction is automati-
cally changed by the microprocessor. However, the temperature on the LCD screen on the remote controller is not
changed. 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 button.
(10) POWERFUL ( ) operation
The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode.
The POWERFUL mode is cancelled automatically 15 minutes after operation starts, or when POWERFUL button
is pressed once again within 15 minutes after operation starts. The operation mode returns to the mode prior to
POWERFUL operation. To cancel this operation manually, select a different mode or press one of the following but-
tons within 15 minutes after operation starts: STOP/OPERATE (OFF/ON), ECONO COOL,
FAN SPEED CONTROL,
CIRCULATOR, or i-save button.
Downward position
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2. Vertical vane
(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 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) STOP/OPERATE (OFF/ON) button is pressed (POWER ON).
1 2 3 4 5
(SWING)
(4) SWING ( ) MODE
By selecting SWING mode with WIDE VANE CONTROL button, the vertical vane swings horizontally. The remote
controller displays “ ”. Swing mode is cancelled when WIDE MODE CONTROL button is pressed once again.
9-7. 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” blinks at the current time display
of TIME MONITOR, so set the current time correctly with CLOCK button.
How to set the current time
(a) Press the CLOCK 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 BACKWARD
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 but-
ton ( ) 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.
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(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.
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.
9-8. WEEKLY TIMER OPERATION
• A maximum of 4 ON or OFF timers can be set for individual days of the week.
• A maximum of 28 ON or OFF timers can be set for a week.
NOTE:
• The simple ON/OFF timer setting is available while the weekly timer is on. In this case, the ON/OFF timer has priority over the
weekly timer; the weekly timer operation will start again after the simple ON/OFF timer is complete.
* Make sure that the current time and day are set correctly.
(1) Press button to enter the weekly timer setting mode.
(2) Press and buttons to select setting day and number.
* blinks.
Pressing selects the day of
the week to be set.
Pressing selects
the setting number.
E.g. : [Mon Tue ... Sun]
and [1] are selected.
* All days can be selected.
1. How to set the weekly timer
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(3) Press , , and buttons to set ON/OFF, time, and temperature.
E.g. : [ON], [6:00]
and [24°C] are
selected.
Pressing
selects ON/OFF timer.
Pressing
deletes timer setting.
Pressing
adjusts the time.
Pressing
adjusts the tem-
perature.
* Hold down the button to change the time quickly.
* The temperature can be set between 16°C and 31°C at COOL operation.
* The temperature can be set between 10°C and 31°C at HEAT operation.
Press and buttons to continue setting the timer for other days and/or numbers.
(5) Press button to turn the weekly timer ON. ( lights.)
•When the weekly timer is ON, the day of the week whose timer setting is completed, will light.
Press button again to turn the weekly timer OFF. ( goes out.)
NOTE:
The saved settings will not be cleared when the weekly timer is turned OFF.
2. Checking weekly timer setting
(1) Press button to enter the weekly timer setting mode.
* blinks.
(2) Press or buttons to view the setting of the particular day or number.
(3) Press button to exit the weekly timer setting.
NOTE:
When all days of the week are selected to view the settings and a di󰀨erent setting is included among them, will be
displayed.
NOTE:
• Press button to transmit the setting information of weekly timer to the indoor unit. Point the remote controller toward the
indoor unit for 3 seconds.
• When setting the timer for more than one day of the week or one number, button does not have to be pressed per each
setting. Press button once after all the settings are completed. All the weekly timer settings will be saved.
• Press button to enter the weekly timer setting mode, and press and hold button for 5 seconds to erase all weekly
timer settings. Point the remote controller toward the indoor unit.
(4) Press button to complete and transmit the weekly timer setting.
* which was blink-
ing goes out, and the
current time will be
displayed.
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9-9. NIGHT MODE ( ) OPERATION
NIGHT MODE changes the brightness of the operation indicator, disables the beep sound and limits the noise level of the
outdoor unit.
(1) Press NIGHT MODE button during operation to activate NIGHT mode ( ).
• The operation indicator lamp dims.
• The beep sound will be disabled except that emitted when the operation is started or stopped.
• Noise level of the outdoor unit will be lower than that mentioned in SPECIFICATIONS.(Except the connection to
MXZ.)
(2) Press NIGHT MODE button to cancel NIGHT mode ( ).
NOTE:
•Noise level of the outdoor unit may not change after startup of the unit, during the protection operation, or depending on other
operating conditions.
•The fan speed of the indoor unit will not change.
•The operation indicator lamp will be hard to be seen in a bright room.
•Operating POWERFUL operation during NIGHT mode will increase the noise level of the outdoor unit.
•Noise level of the outdoor unit will not decrease during Multi system operation.
9-10. i-save ( ) OPERATION
1. How to set i-save operation
(1) Press STOP/OPERATE (OFF/ON) button.
(2) Select COOL, CIRCULATOR, HEAT, ECONO COOL, or NIGHT mode.
(3) Press i-save button.
(4) Set the temperature, fan speed, and airow direction for i-save operation.
NOTE:
• i-save operation cannot be selected during DRY, FAN or AUTO mode operation.
• The setting range of HEAT mode i-save operation is 10 - 31°C.
• 2 groups of setting can be saved. (One for COOL/ECONO COOL/CIRCULATOR, one for HEAT)
2. How to cancel operation
• Press i-save button again.
• i-save operation can also be cancelled by pressing POWERFUL button or OPERATION SELECT button to change
the operation mode.
The same setting is select from the next time by simply pressing i-save button.
9-11. CIRCULATOR OPERATION
In case the indoor temperature reaches the setting temperature, the outdoor unit stops and the indoor unit starts FAN oper-
ation to circulate the indoor air.
The setting of fan speed and airflow direction can be changed.
The outdoor unit starts operation automatically when the indoor temperature drops below the setting temperature.
(1) Press CIRCULATOR button during HEAT mode to enable CIRCULATOR operation.
The unit performs FAN operation in case the indoor temperature reaches the setting temperature.
(2) Set the fan speed and airflow direction.
• The setting of fan speed and airflow direction is common for HEAT and CIRCULATOR operation.
• Ventilation starts at Low fan speed in case AUTO fan speed is selected.
(3) Press CIRCULATOR button again to cancel CIRCULATOR operation.
NOTE:
1. FAN operation may make you feel cold wind.
Reduce the FAN speed or adjust the airflow direction to avoid the wind.
2. CIRCULATOR operation doesn't work in the following situation.
• AUTO mode (Auto change over) is selected.
• Defrosting is being done.
• Indoor unit is connected to multi type outdoor unit.
Although received sound is heard from the indoor unit and mark is displayed on remote controller when the but-
ton is pushed, CIRCULATOR operation will not work in multi connection.
OBH864