Mitsubishi Electric MSY-TP35VF-E1 User manual

CONTENTS
1. TECHNICAL CHANGES ······························3
2. PART NAMES AND FUNCTIONS··················4
3. SPECIFICATION ········································5
4. NOISE CRITERIA CURVES··························6
5. OUTLINES AND DIMENSIONS·····················7
6. WIRING DIAGRAM·····································8
7. REFRIGERANT SYSTEM DIAGRAM···········10
8. SERVICE FUNCTIONS······························ 11
9. MICROPROCESSOR CONTROL ················13
10. TROUBLESHOOTING·······························22
11. DISASSEMBLY INSTRUCTIONS·················33
MSY-TP35VF -E1 , ET1 , ER1 , E2
MSY-TP50VF -E1 , ET1 , ER1 , E2
Outdoor unit service manual
MUY-TP·VF Series (OBH817)
SERVICE MANUAL No. OBH816
REVISED EDITION-C
PARTS CATALOG (OBB816)
Models
INDOOR UNIT
OBH816 REVISED EDITION-B is void.
Revision C:
• Error Code has been added in 10-4.
TROUBLESHOOTING CHECK TABLE.

2
Revision A:
• 10. TROUBLESHOOTING has been modified.
Revision B:
• MSY-TP35/50VF - ER1 , E2 have been added.
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.
<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 pull 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.
WARNING
• When the refrigeration circuit has a leak, do not execute pump down with the compressor.
• When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes.
The compressor may burst if air etc. get into it.
• When opening or closing the valve below freezing temperatures, refrigerant may spurt out from the gap
between the valve stem and the valve body, resulting in injuries.
Revision C:
• Error Code has been added in 10-4. TROUBLESHOOTING CHECK TABLE.
OBH816C

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1TECHNICAL CHANGES
MSY-TP35VF - E1 , ET1 , ER1
MSY-TP50VF - E1 , ET1 , ER1
1. New model
MSY-TP35VF - E1 MSY-TP35VF - E2
MSY-TP50VF - E1 MSY-TP50VF - E2
1. Indoor electronic control P.C.board has been changed.
OBH816C

4
Operation indicator lamp
Remote control
receiving section
Horizontal vane
Air inlet
Air filter
Front panel
Air outlet
Heat exchanger
Emergency operation switch
Fan guard
ACCESSORIES
MSY-TP35VF MSY-TP50VF
Installation plate 1
Installation plate xing screw 4 ×25 mm 5
Felt tape (Used for left or left-rear piping) 1
2PART NAMES AND FUNCTIONS
OBH816C

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Indoor model MSY-TP35VF MSY-TP50VF
Power supply Single phase 230 V, 50 Hz
Breaker Capacity A 10
Electrical data
Power input *1 (Total) Cooling W 760 1,450
Running current *1 (Total) Cooling A 3.6 6.4
Power factor *1 (Total) Cooling % 91 98
Starting current *1 (Total) A 3.6 6.4
Fan motor
Model E1 , ET1 : RC0J30-MD, ER1 , E2 : RCOJ40-SA
Current *1 Cooling A 0.32
Dimensions W × H × D mm 923 × 305 × 250
Weight kg 12.5
Special remarks
Air direction 5
Airow
Cooling
Super High
m3/h
984 990
High 822
Med. 696
Low 606
Sound
level
Cooling
Super High
dB(A)
45
High 40
Med. 36
Low 31
Fan speed
Cooling
Super High
rpm
1,070 1,080
High 930
Med. 820
Low 740
Fan speed regulator 4
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
*1 Measured under rated operating frequency.
Specifications and rated conditions of main electric parts
Fuse (F11) T3.15AL250V
Horizontal vane motor (MV) 12 V DC
Varistor
(NR11) 470 V
Terminal block (TB) 5P
3SPECIFICATION
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4NOISE CRITERIA CURVES
MSY-TP35VF MSY-TP50VF
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
45
90
80
70
60
50
40
30
20
10 63 125 250 500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
NC-10
COOLING
FUNCTION SPL(dB(A)) LINE
Super High
FAN SPEED
45
INDOOR UNIT WALL
MICROPHONE
0.8m
1m
Test conditions
Cooling : Dry-bulb temperature 27°C Wet-bulb temperature 19°C
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Unit: mm
5OUTLINES AND DIMENSIONS
MSY-TP35VF MSY-TP50VF
Piping
Insulation Ø50 O.D
Liquid line Ø8 - 0.5m (Flared connection Ø6.35)
Gas line Ø12 - 0.45m (Flared connection Ø9.52)
Drain hose
Insulation Connected part Ø16 O.D
OBH816C

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6WIRING DIAGRAM
MSY-TP35VF - E1 MSY-TP50VF - E1
MSY-TP35VF - ET1 MSY-TP50VF - ET1
Terminal bloğu
Konektör
KANAT MOTORU
(YATAY)
TERMİK SİGORTA
(
102 Ý
4.5A
)
GÜÇ KAYNAĞI
DIŞ ÜNİTEYE
SİGORTA
3. Sembolleri gösterir
2. Sadece bakır besleme kablosu kullanın
NOTLAR
:
1. Dış ünite elektronik kablolaması için dış ünite
elektronik kablo devre şemasını referans alınız.
İÇ ÜNİTE GÜÇ
KARTI
İÇ ÜNİTE ELEKTRONİK
KONTROL KARTI
REAKTÖR
PARÇA ADI
SİGORTA
(T3.15AL250V)
FAN MOTORU
VARİSTÖR
ODA SICAKLIK
TERMİSTÖRÜ
BORU SICAKLIK
TERMİSTÖRÜ(ANA)
BORU SICAKLIK
TERMİSTÖRÜ(YARDIMCI)
TRAFO
TERMİNAL BLOĞU
KONTAKTÖR
TERMİNAL UCU
OBH816C

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MSY-TP35VF - E2 , ER1 MSY-TP50VF - E2 , ER1
OBH816C

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MSY-TP35VF MSY-TP50VF Unit: mm
7REFRIGERANT SYSTEM DIAGRAM
Indoor
heat
exchanger
Flared connection
Room temperature
thermistor
RT11
Flared connection
Refrigerant flow in cooling
Refrigerant pipe ø9.52
(with heat insulator)
Refrigerant pipe ø6.35
(with heat insulator)
Indoor coil
thermistor
RT12
Indoor coil
thermistor
RT13
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8SERVICE FUNCTIONS
8-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION (Option: MAC-SL100M-E)
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 :
Table 1 1 unit operation 2 units operation 3 units operation 4 units operation
No. 1 unit No modication Same as at left Same as at left Same as at left
No. 2 unit – Solder J2 Same as at left Same as at left
No. 3 unit – – Solder J4 Same as at left
No. 4 unit – – – Solder both J2 and J4
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.
The P.C. board has the print “J2” and “J4”. Solder “J2” and “J4” 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
OFF/ON (stop/operate)
button 2 or 3 times at first.
After finish modification,
put back the batteries then
press the RESET button.
J2
J4
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.)
Set time : 3-minute →3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is
shortened by bridging the timer short mode point.)
NOTE: While the relay 52C is ON, the compressor starting time cannot be shortened.
MSY-TP35VF MSY-TP50VF
OBH816C

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MSY-TP35VF MSY-TP50VF
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.
JR77
Indoor electronic
control P.C. board
CN10ACN111
CN151
CN112
CN110
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.)
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WIRED REMOTE CONTROLLER (Option : Example) PAR-33MAA
MSY-TP35VF MSY-TP50VF
9MICROPROCESSOR CONTROL
The main display can be displayed in 2 different modes: "Full" and "Basic."
The initial setting is "Full."
Fri
Mode Temp. Fan
Room
Cool Auto
Set temp.
Fri
Cool
Mode Temp. Fan
AutoSet temp.
1
2
3
4
5
21
20
4
3
191716
15
14
13
12
6
8
10
1
11
7
9
22
5
2
Fan speed setting appears here.
4Fan speed
Appears while the units are operated in the
energy-saving mode.
Appears while the outdoor units are operated in
the silent mode.
Preset temperature appears here.
Appears when the ON/OFF operation is centrally
controlled.
Current time appears here.
Appears when the buttons are locked.
Indoor unit operation mode appears here.
Appears when the operation mode is centrally
controlled.
15
16
2Preset temperature
6
12
1Operation mode
7
Appears when the units are operated in the
energy-saving mode with 3D i-see Sensor.
18
Indicates the louver setting.
Indicates the ventilation setting.
Appears when the On/Off timer or Night setback
function is enabled.
20
21
13
Indicates when filter needs maintenance.
Appears when the filter reset function is centrally
controlled.
Appears when the preset temperature is centrally
controlled.
10
9
8
Appears when the Weekly timer is enabled.
14
Appears when the preset temperature range is
restricted.
22
Functions of the corresponding buttons appear
here.
5Button function guide
Appears when the built-in thermistor on the
remote controller is activated to monitor the
room temperature (a).
appears when the thermistor on the
indoor unit is activated to monitor the room
temperature.
17
3Clock
(See the Installation Manual.)
Current room temperature appears here.
11 Room temperature
(See the Installation Manual.)
Note: All icons are displayed for explanation.
5
6
1234
Press to turn ON/OFF the indoor unit.
1
This lamp lights up in green while the unit
is in operation. It blinks while the remote
controller is starting up or when there is
an error.
Press to save the setting.
Main display: Press to change the operation
mode.
Main menu: Press to move the cursor down.
Press to return to the previous screen.
Main display : Press to decrease temperature.
Main menu: Press to move the cursor up.
Press to bring up the Main menu.
Main display : Press to increase temperature.
Main menu: Press to go to the previous page.
Operation settings will appear.
When the backlight is off, pressing any
button turns the backlight on and it
will stay lit for a certain period of time
depending on the screen.
Main display : Press to change the fan speed.
Main menu: Press to go to the next page.
6ON/OFF lamp
2SELECT button
7Function button F1
3RETURN button
8Function button F2
4MENU button
9Function button F3
5Backlit LCD
10 Function button F4
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
The functions of the function buttons
change depending on the screen. Refer
to the button function guide that appears
at the bottom of the LCD for the functions
they serve on a given screen.
When the system is centrally controlled,
the button function guide that
corresponds to the locked button will not
appear.
Main display Main menu
Function guide
7 8 9 0 7 8 9 10
• When the backlight is off, pressing any button turns the backlight on and
does not perform its function. (except for the OFF/ON button)
• Most settings (except OFF/ON, mode, fan speed, temperature) can be
made from the Menu screen.
Display
Full mode
Basic mode
Controller interface
Function buttons
10987
18
Indicates the vane setting.
19
OFF/ON button
1
NOTE: MAC-SL100M-E (option) may be used with this product.
(Refer to 2 WIRELESS REMOTE CONTROLLER.)
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Not all functions are available on all models of indoor units.
Energy-saving
Auto return
Schedule
Night setback
Main menu Press button.
Move the cursor to the desired item with and buttons, and press button.
Vane · Louver · Vent. (Lossnay)
High power
Weekly timer
Restriction
Maintenance
Initial setting
ON/OFF timer
Auto-OFF timer
Temp. range
Operation lock
Manual vane angle
Main/Sub
Timer
Main display
Contrast
Display details
Auto mode
Administrator password
Language selection
Daylight saving time
Service
Input maintenance info.
Function setting
Check
Self check
Maintenance password
Remote controller check
Test run
Clock
Auto descending panel
Menu structure
Filter information
Error information
3D i-see Sensor
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Setting and display items Setting details
Vane · Louver · Vent.
(Lossnay)
Use to set the vane angle.
• Select a desired vane setting from 5 di󰀨erent settings.
Use to turn ON/OFF the louver.
Not available
Use to set the amount of ventilation.
Not available
High power Use to reach the comfortable room temperature quickly.
Not available
Timer ON/OFF timer* Use to set the operation ON/OFF times.
• Time can be set in 5-minute increments.
Auto-O󰀨 timer Use to set the Auto-OFF time.
• Time can be set to a value from 30 to 240 in 10-minute increments.
Filter information Use to check the lter status.
Not available
Error information Use to check error information when an error occurs.
• Check code, error source, refrigerant address, unit model, manufacturing number, contact information (dealer's phone
number) can be displayed.
(The unit model, manufacturing number, and contact information need to be registered in advance to be displayed.)
Weekly timer* Use to set the weekly operation ON/OFF times.
• Up to 8 operation patterns can be set for each day.
(Not valid when the ON/OFF timer is enabled.)
Energy saving Auto return Use to get the units to operate at the preset temperature after performing energy-saving operation for a
specied time period.
• Time can be set to a value from 30 and 120 in 10-minute increments.
(This function will not be valid when the preset temperature ranges are restricted.)
Schedule* Set the start/stop times to operate the units in the energy-saving mode for each day of the week, and set the
energy-saving rate.
Not available
Night setback* Use to make Night setback settings.
•
Select "Yes" to enable the setting, and "No" to disable the setting. The temperature range and the start/stop times can be set.
Restriction Temp. range Use to restrict the preset temperature range.
• Di󰀨erent temperature ranges can be set for di󰀨erent operation modes.
Operation lock Use to lock selected functions.
• The locked functions cannot be operated.
Maintenance Auto descending panel Not available
Manual vane angle Not available
3D i-see Sensor Not available
Initial setting Main/Sub When connecting 2 remote controllers, one of them needs to be designated as a sub controller.
Clock Use to set the current time.
Main display Use to switch between "Full" and "Basic" modes for the Main display.
• The initial setting is "Full."
Contrast Use to adjust screen contrast.
Display details Make the settings for the remote controller related items as necessary.
Clock: The initial settings are "Yes" and "24h" format.
Temperature: Set either Celsius (°C) or Fahrenheit (°F).
Room temp. : Set Show or Hide.
Auto mode: Set the Auto mode display or Only Auto display.
Auto mode Whether or not to use the AUTO mode can be selected by using the button.
This setting is valid only when indoor units with the AUTO mode function are connected.
Administrator pass-
word
The administrator password is required to make the settings for the following items.
• Timer setting • Energy-saving setting • Weekly timer setting
• Restriction setting • Outdoor unit silent mode setting • Night set back
Language selection Use to select the desired language.
Daylight saving time Sets the daylight saving time.
Service Test run Select "Test run" from the Service menu to bring up the Test run menu.
Not available
Input maintenance Select "Input maintenance Info." from the Service menu to bring up the Maintenance information screen.
The following settings can be made from the Maintenance Information screen.
• Model name input • Serial No. input • Dealer information input
Function setting Not available
Check Error history: Display the error history and delete the error history.
Refrigerant leak check: Not available
Smooth maintenance: Not available
Request code : Not available
Self check Error history of each unit can be checked via the remote controller.
Maintenance password Use to change the maintenance password.
Remote controller
check
When the remote controller does not work properly, use the remote controller checking function to trouble-
shoot the problem.
* Clock setting is required.
Main menu list
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(1) Press button.
OFF/ON lamp will light up in green and the operation will start.
(2) Select COOL mode with button.
(3) Press button to decrease the preset temperature, and button to increase.
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 com-
pressor stops. This mode continues until the tempera-
ture of indoor heat exchanger rises.
9-2. DRY ( ) OPERATION
(1) Press button.
OFF/ON lamp will light up in green and the operation
will start.
(2) Select DRY mode with button.
(3) Press button to decrease the preset temperature, and button to in crease.
1. Coil frost prevention
Coil frost prevention works the same way as that in COOL mode. (9-1.1.)
Operation status memory
Remote controller setting
Operation mode Operation mode before the power was turned o󰀨
Preset temperature Preset temperature before the power was turned o󰀨
Fan speed Fan speed before the power was turned o󰀨
Settable preset temperature range
Operation mode Preset temperature range
Cool/Dry 16 ~ 31ºC
Fan/Ventilation Not settable
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
Lit
Blinking
Not lit
INDOOR UNIT DISPLAY SECTION
9-1. COOL ( ) OPERATION
Mode selection
Press button to go through the operation
modes in the order of “Cool”, “Dry”, and
“Fan”. Select the desired operation mode.
Cool Dry Fan
F1 F2 F3 F4
Cool Room AutoSet temp.
Mode Temp. Fan
Fri F1
Example display
(Centigrade in 0.5-degree
increments)
Preset temperature will be displayed either in Centigrade in 0.5- or 1-degree•
increments, or in Fahrenheit, depending on the display mode setting on the
remote controller.
Cool Room AutoSet temp.
Mode Temp. Fan
Fri
F1 F2 F3 F4
Cool Room AutoSet temp.
Mode Temp. Fan
Fri
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9-4. 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) How to set the vane angle
Press the button.
Select “Vane·Louver·Vent. (Lossnay)” with or button, and press button.
Press or button to go through the vane setting options: “Auto”, “Step 1”, “Step 2”, “Step 3”, “Step 4”, “Step 5”
and “Swing”, and select the desired setting.
Press button to go back to the Main menu.
(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.
F1 F2 F3 F4
Cool Room AutoSet temp.
Mode Temp. Fan
Fri Press button to go through the fan speeds in the following order.
Auto
Low Med.
Super High High
F1 F2 F3 F4
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
F1 F2 F3 F4
Fri
Swing Off Off
LouverVent.Vane
Auto
Auto
Swing
Step 1 Step 2
Step 4Step 3
Swing
Step 5
9-3. FAN( )OPERATION
(1) Press button. OFF/ON lamp will light up in green and the operation will start.
(2) Select FAN mode with button.
(3) Press button to select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates. Outdoor unit does not operate.
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(4) VANE AUTO ( ) mode
In VANE AUTO mode, the microprocessor automatically determines the vane angle to make the optimum room tempera-
ture distribution.
Horizontal
position
In COOL and DRY operation
Vane angle is fixed to Horizontal position.
(5) STOP (operation OFF) and ON TIMER standby
In the following cases, the horizontal vane returns to the closed position.
(a) When 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 3 ~ 5 when the compressor cumulative operation time
exceeds 1 hour, the vane angle automatically changes to Angle 2 for dew prevention.
(7) SWING ( ) mode
Select “Swing” to move the vanes up and down automatically.
When set to “Step 1” through “Step 5”, the vane will be xed at the selected angle.
9-5. TIMER OPERATION (ON/OFF TIMER)
The unit automatically turns on or off at the preset time.
Select "Timer" from the Main menu, and press button (Refer to the appropriate operation manual include with
remote controller.).
EMERGENCY OPERATION switch
9-6. 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 or has failed, or when the batteries in
the remote controller are 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 MODE with a set temperature of 24°C.
The fan speed shifts to Med.
The coil frost prevention works even in the test run or the emergency operation.
In the test run or emergency operation, the horizontal vane operates in VANE AUTO ( ) mode.
Emergency operation continues until EMERGENCY OPERATION switch is pressed once 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.
Operation mode COOL
Set temperature 24°C
Fan speed Med.
Horizontal vane Auto
The operation mode is indicated by the
Operation Indicator lamp as follows:
Operation Indicator lamp
EMERGENCY COOL
↓
STOP
Lit
Not lit
9-7. 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.
OBH816C

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WIRELESS REMOTE CONTROLLER
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
Lit
Blinking
Not lit
INDOOR UNIT DISPLAY SECTION
TIME set buttons
RESET button
VANE control button
Signal transmitting section
Operation display section
Temperature buttons
OFF/ON (stop/operate) button
FAN speed control button
Operation select button
TIMER mode select button
ECONO COOL button
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.
2(Option : Example) MAC-SL100M-E
NOTE: This product cannot use
HEAT mode and
ECONO COOL operation.
OBH816C

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9-8. COOL ( ) OPERATION
(1) Press OFF/ON (stop/operate) 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 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.
9-9. DRY ( ) OPERATION
(1) Press OFF/ON (stop/operate) 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. (9-8.1.)
2. Low outside temperature operation
Low outside temperature operation works the same way as that in COOL mode. (9-8.2.)
9-10. FAN( )OPERATION
(1) Press OFF/ON (stop/operate) 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.
9-11. 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 tempera-
ture distribution.
In COOL and DRY operation
Vane angle is fixed to Horizontal position.
Horizontal
position
OBH816C