background image

7

(9) POWERFUL COOL (

) mode

When POWERFUL COOL button is pressed in COOL mode, the fan speed and the set temperature are automatically
adjusted.
Operation becomes POWERFUL COOL mode.
POWERFUL COOL mode is automatically released 15 minutes after operation starts, and the operation mode returns to
the mode prior to POWERFUL COOL operation.
POWERFUL COOL mode is also cancelled when POWERFUL COOL button is pressed once again, OPERATE / STOP
(ON/OFF) button is pressed, FAN SPEED CONTROL button is pressed, ECONO COOL button is pressed in COOL
mode, ON-TIMER is set or change to other operation mode.

NOTE1. : TEMPERATURE buttons are not available during POWERFUL COOL operation.

: VANE CONTROL button is available.

7. TIMER OPERATION

1. How to set the timer
(1) Press OPERATE/STOP (ON/OFF) button to start the air conditioner.

(2) Press TIMER MODE SELECT button 

(

)

to select the operation.

(OFF TIMER)

(ON TIMER)

TIMER RELEASE

Each time this button is pressed, the timer mode is changed in sequence.

(3) Press TIME SET button (

)

to set the timer.

Each time this button is pressed, the set time increases by 1 hour to 12 hours.

NOTE 1 : Be sure to place the remote controller at the position where its signal can reach the air conditioner even during 

TIMER operation.

NOTE 2 : Reset the timer in the following cases, or the set time  may deviate and other malfunctions may occur.

• A power failure occurs.
• The circuit breaker functions.

NOTE 3 : The OFF TIMER and ON TIMER can not be set at the same time. 

TIME

SELECT

(Example 1) Setting to stop the air conditioner 3 hours later.

Press “

” button to select “

(OFF TIMER)

.

Press “

” button to set the “3h”.

TIME

SELECT

3

h

7

h

(Example 2) Setting to operate the air conditioner 7 hours later.

Press “

” button to select “

(ON TIMER)

.

Press “

” button to set the “7h”.

TIME

SELECT

2. Cancel

Press “

” button until “

(OFF TIMER)

and “

(ON TIMER)

are not displayed.

SELECT

EMERGENCY OPERATION switch

Press once <Cool>

Press again <Stop>

• The following indication applies 
   regardless of shape of the indicator.

OPERATION INDICATOR lamp

8. EMERGENCY / TEST OPERATION

In case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoor
unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of remote con-
troller run down. The unit will start and OPERATION INDICATOR lamp will light.
The first 30 minutes of operation is the test run operation. This operation is for servicing. Indoor fan runs at High speed
and the unit continues to operate with the thermostat on.
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 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 again or the unit receives any signal
from the remote controller. In case of latter normal operation will start.

NOTE : Do not press EMERGENCY OPERATION switch during normal operation.

OBT10.qxp  05.5.11 11:26 AM  Page 7

Summary of Contents for MS-A08ND

Page 1: ... A12ND MS A15ND WH MU A15ND C1 C1 C1 C1 C1 C1 C1 C1 No OBT10 SPLIT TYPE AIR CONDITIONERS CONTENTS MICROPROCESSOR CONTROL 1 I FEEL CONTROL OPERATION 2 2 COOL OPERATION 5 3 DRY OPERATION 5 4 FAN OPERATION 5 5 FAN MOTOR CONTROL 5 6 AUTO VANE OPERATION 5 7 TIMER OPERATION 7 8 EMERGENCY TEST OPERATION 7 TM ...

Page 2: ...peration state INDOOR UNIT DISPLAY SECTION The following indication applies regardless of shape of the indicator Once the mode is fixed the mode does not change by room temperature afterwards Under ON TIMER operation the mode is deter mined according to the room temperature at set time the operation starts When the system is stopped by the remote controller and restarted within 2 hours in I FEEL C...

Page 3: ...room temperature the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or cold So this is called Fuzzy control and works only in I FEEL CONTROL mode In DRY mode of I FEEL CONTROL the set temperature doesn t change To raise the set temperature 1 2 degrees To lower the set temperature 1 2 degrees TOO COOL TOO WARM 1 deg 1 7 deg 3 deg Difference between room temperat...

Page 4: ...Operation time chart Example Thermostat Indoor fan Outdoor fan Compressor ON 8 min 1 min 3 min 4 min ON OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON ON ON ON 4 Coil frost prevention The operation is the same as coil frost prevention during COOL mode of I FEEL CONTROL Indoor fan operates at the set speed and the compressor stops for 5 minutes because coil frost prevention has priority When coil frost p...

Page 5: ... work The other operations are same as DRY mode of I FEEL CONTROL 4 DRY operation will not work when the room temperature is 13 C or below 4 FAN OPERATION 1 Press OPERATE STOP ON OFF 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...

Page 6: ... is pressed in COOL mode set temperature is automatically set 2 higher than that in COOL mode Also the horizontal vane swings in a cycle which fits the temperature of indoor heat exchanger RT12 SWING operation makes you feel cooler than set temperature So even though the set temperature is higher than that in COOL mode the air conditioner can keep comfort As a result energy can be saved ECONO COOL...

Page 7: ... can not be set at the same time TIME SELECT Example 1 Setting to stop the air conditioner 3 hours later 1 Press button to select OFF TIMER 2 Press button to set the 3h TIME SELECT 3 h 7 h Example 2 Setting to operate the air conditioner 7 hours later 1 Press button to select ON TIMER 2 Press button to set the 7h TIME SELECT 2 Cancel Press button until OFF TIMER and ON TIMER are not displayed SELE...

Page 8: ...2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in May 2005 No OBT10 7 Made in Japan New publication effective May 2005 Specifications subject to change without notice TM ...

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