Mitsubishi Electric MSH-07RV User manual

ADVANCED AND EVER ADVANCING MITSUBISHI ELECTRIC
A MITSUBISHI
ELECTRIC
SPLIT-TYPE AIR CONDITIONERS
OPERATING INSTRUCTIONS
MSH-07RV
MSH-09RV
MSH-12RV
MSH-18RV
MSH-24RV
CONTENTS
For customers
Thank you very much for purchasing this Mitsubishi room air conditioner.
• To use this unit correctly and safely, be sure to read this operating instructions before use. Keep this manual carefully for
later reference.
• Be sure to receive a guarantee card from your dealer and check that the purchased data and shop name, etc. are
entered correctly.
• This air conditioner should not be installed by the customer. (Safety and performance functions cannot be assured.)
SAFETY PRECAUTIONS. 2
NAME OF EACH PART.4
PREPARATION BEFORE OPERATION .6
I FEEL... AUTO OPERATION.7
MANUAL OPERATION (COOL, DRY, HEAT).8
AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT.9
ECONO COOL OPERATION.10
TIMER OPERATION (ON/OFFTIMER).11
WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR
ALONG TIME.11
MAINTENANCE.12
CLEANING THE AIR FILTER AND THE DEODORIZING FILTER.12
REPLACEMENT OF THE DEODORIZING FILTER/AIR CLEANING FILTER ... 13
BEFORE CONTACTING THE SERVICE REPRESENTATIVE, CHECK THE
FOLLOWING AGAIN .13
WHEN YOU THINK THAT TROUBLE HAS OCCURRED .14
INSTALLATION, RELOCATION AND INSPECTION.15

® Since rotating parts and parts which could cause an electric shock are used in this product, be sure
to read these “Safety Precautions” before use.
• Since the cautionary items shown here are important for safety, be sure to observe them.
Marks and their meanings are as shown below.
A
WARNING
Incorrect handling could cause a serious hazard, such as death, serious injury,
etc. with a high probability.
A
CAUTION
Incorrect handling could cause a serious hazard depending on the conditions.
Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
Never insert your finger or stick, etc.
(Black) Never step onto the indoor/outdoor unit and do not put anything on them.
/lj\ (Yellow) | Danger of electric shock, be careful.
Be sure to disconnect the power supply plug from the power outlet
Be sure to shut off the power.
® After reading this manual, keep it together with the installation manual in a handy place for easy
reference.
Warning mark positions and safety devices
FRONT PANEL CSS
ENCLOSURE
& WARNING
This air conditioner is NOT intended for use by children or infirm persons without supervisions.
Do not use intermediate con¬
nection of the power supply
cord or the extension cord
and do not connect many
. devices to one AC outlet.
Remove dirt from the power
supply plug and securely in¬
sert the plug into the outlet
If dirt adheres to the plug or in¬
sertion is incomplete, it may
cause a fire or an electric shock.
Do not turn the breaker
off/on or disconnect/con¬
nect the power supply
plug during operation.
© This may cause a fire due to
spark, etc.
© Be sure to turn off the breaker
or disconnect the pov/er supply
plug absolutely after switching
the indoor unit off with the re¬
mote controller. _
//// ■ '"
Do not expose your skin
directly to cool air for a
longtime.
m
Do not insert your finger
or a stick, etc. into the air
inlet/outlet.
Since the fan rotates at high
speed, this may cause an injury.
Young children should be super¬
vised to ensure that they do not
play with the air conditioner.
i0
Repair or relocation
should not be done by
•the customer. .
If this is done incorrectly, it may
cause a fire, an electric shock,
or injury from the unit falling, wa¬
ter leaking, etc.
Consult your dealer.
Do not scratch or process
tiie power supply cord, etc.
© Do not put heavy object on the
pov/er supply cord and do not
scratch or process the cord. The
cord may be damaged and this may
cause a fire or an electric shock.
|q to
When an abnormality
(burning smell, etc.) oc¬
curs, stop the air condi¬
tioner and disconnect
the power supply plug or
turn off the breaker.
The customer should
not install this unit.
If this is done incorrectly, it may
cause a fire, an electric shock,
or i njury from the unit falling, wa¬
ter leaking, etc.
Consult your dealer.

/- V' > •
tmm&m
When.theairfilter is to be
removed, do not touch
the metai parts of the in-:
door unit. S
This may cause an injury.
AW
When the unit is to be
cleaned; switch it off and
disconnect the power
supply plug or turn off
the breaker.
Since the fan rotates at high
speed during operation, this may
cause an injury.
Do not operate switches
with wet hands.
This may cause an electric shock.
nril*
Do not pull the power
supply cord.
© The unit may fall and this may
cause an injury.
Replace the 2 batteries
with new ones of same
type.
Using an old battery together with
a new one may result in heat gen¬
eration, leakage or an explosion.
Do not charge or disas¬
semble the batteries and
do not throw them into af
fire-• \ ;
This may result in leakage, fire or
an explosion.
If liquid from the alkaline
batteries gets onto your
skin or clothes, wash it
well with clean water.
If liquid from the alkaline batter¬
ies gets into your eyes, wash
them well with clean water and
consult a doctor at once.
o

ft
NAME OF EACH PART
Indoor unit
Outdoor unit

NAME OF EACH PART
Remote controller
( Signal transmitting section J-
[ Operation display section
ON/OFF (operate/
stop) button
Amttsubsshi electric
Bfea
warmwcooi ;
<*/
Temperature buttons J
(This diagram shows an overall view.)

iooitb restarifunction
■ These models are equipped with the auto restart function, but this function is OFF
when the units are shipped from the factory. If you want to use the auto restart
function, please consult the service representative because the setting of the unit
needs to be changed.
— Auto restart function is ... -
When the indoor unit is controlled with the remote controller, the operation mode, the set temperature and
the fan speed are memorized by the memory. If a power failure occurs or the main power is turned off during
operation, “Auto restart function" sets automatically to start operating in the same mode as set with the
remote controller right before the shutoff of main power._
Indoor unit
■ Insert the power supply plug into the
power outlet and/or turn the breaker
on.
A WARNING-
Remove dirt from the power supply plug and insert
the plug securely.
If dirt adheres to the plug or insertion is incomplete,
it may cause a fire or an electric shock.
Remote controller (How to set the current time)
■ Remove the front lid and insert bat¬
teries. Then reattach the front lid.
Insert the minus pole of the batteries first.
Check if the polarity of the batteries is correct.
Press the RESET button.
If the RESET button is not pressed, the remote control¬
ler may not operate correctly.
Press the and button
(TIME SET button) to set the current
time.
FAN
©STOP
issgeas
■ ' 6
mo~
ULJ i-o-o r
VANE
K |
0 START
|©-t |
HR.
1 !
CUD
EC8SOCCO.
MIN.
1 © 1
rzi
GZ3 +
82ET fc£»< j
0.0 [||
Each time the button is pressed, the set time in¬
creases by 1 hour, and each time the button is
pressed, the set time increases by 1 minute.
Press the CLOCK set button again
and close the front lid.
Handling of the remote controller
0 The range that the signal can reach is about 6 m
when pointed at the front of the indoor unit.
® When a button is pressed, one or two beeps will
be heard from the indoor unit. If no sound is heard,
operate again.
® Use the remote controller carefully.
If it is dropped, thrown or it gets wet, the remote
controller may not operate.
When installing on a wall, etc.
® Install the remote controller installation case in a
position where the signal reception sound (beep)
can be heard from the indoor unit when the ^
button is pressed.
How to install/remove the remote controller
Insert the remote controller downward.
Pull it up.
Installing
Removing
Dry-cell batteries
| Reference for replacing batteries
When the indoor unit does not respond to the signal
from the remote controller, or the display becomes
dim, replace the batteries with new ones (size AAA).
° Though both alkaline batteries and manganese
batteries can be used, alkaline batteries are rec¬
ommended because their service life is longer than
that of manganese batteries.
0 The service life of an alkaline battery is about 1 year.
However, a battery which the time limit is ap¬
proaching may be exhausted soon. The recom¬
mended usable time limit is indicated (month/year)
on the bottom of the battery.
6 Replace the 2 batteries with new ones of the same
type.
® Do not use rechargeable batteries.
® To prevent liquid leakage, take out all batteries
when the remote controller is not going to be used
fora long time.
® Dispose of exhausted batteries in the correct man¬
ner.
When the remote controller cannot
be used (emergency operalion)
When the batteries of the remote controller run out or
the remote controller malfunctions, the emergency op¬
eration can be done using the EMERGENCY OPERA¬
TION switch.
■ Press the EMERGENCY OPERA¬
TION switch.
* Each time the EMERGENCY OPERATION
switch is pressed, the unit wili operate in order
of EMERGENCY COOL MODE, EMER¬
GENCY HEAT MODE and STOP MODE.
However, when the EMERGENCY OPERA¬
TION switch is once pressed, the unit will oper¬
ate in test run for 30 minutes and then the op¬
eration mode shifts to EMERGENCY MODE.
MS H-07/09/12RV MSH-18/24RV
Details of EMERGENCY MODE are as shown below.
However, the temperature control does not work for 30
minutes in test run and the unit is set to continuous
operation. The fan speed is set to Hi in test run and
shifts to Medium after 30 minutes.
Operation mode COOL
HEAT
Set temperature
24~C
24=C
Fan speed Medium Medium
Horizontal vane Auto Auto
The operation mode is indicated by the Operation Indi¬
cator lamp on the indoor unit as following figures.
Operation indicator lamp
M S H-07/09/12RV
EMERGENCY COOL EMERGENCY HEAT STOP
-«*- CD CD
CD CD
Operation
Operation
Operation
Indicator Indicator Indicator
MSH-18/24RV
EMERGENCY COOL EMERGENCY HEAT STOP
Operation Indicator
$ o
—>
Operation Indicator
0 ;i;
—>
Operalion Indicator
0 0
■ To stop the emergency operation,
press the EMERGENCY OPERATION
switch once (in case of EMER¬
GENCY HEAT MODE) or twice (in
case of EMERGENCY COOL MODE).
6

I FEEL... AUTO OPERATION
With the "0 {i FEEL...)” auto operation mode,
the optimum room condition can be set automati¬
cally with a one-touch operation.
A MITSUBISHI ELECTRIC
CLOCK
‘(0) F If
II I-1 II I
IU ■ UU
ON/OFF TOO fh TOO ;
■ Wu WARM 'A' COOL :
©STOP
I J t 9
| 0-0
VANE
©START
o To start operation:
OUKff
HHl Press the ^ button.
When the “0 (I FEEL...)” mode is selected, the air
conditioner is automatically controlled at the optimum
temperature.
To stop operation:
outset
H Press the button.
• If you feel slightly warm:
gjjj Press the @ button to lower the tempera-
““ ture.
One press lowers the temperature by about 1 °C.
o If you feel slightly cool:
§g|j Press the (!) button to raise the tempera-
ture.
One press raises the temperature by about 1°C.
When “0 (I FEEL...)” is not selected, press the
g button until it is set.
Each time the button is pressed, the operation mode is
changed in sequence: 0 (1FEEI—) Q (COOL) 6 (DRY)
-»0 (HEAT)
FAN ©STOP
I # i 10-01
'VANE ©START'
Details of operation
According to the room temperature when the operation starts,
the operation mode is automatically selected COOL, DRY or
HEAT. However, when operation is started again within 2 hours
after it is stopped, the same operation mode before the opera¬
tion is stopped is selected. The operation mode selected first is
not changed even if the room temperature changes. If the op¬
eration mode does not match the room condition, select the ap¬
propriate operation mode by pressing the .WQPI button.
Details of auto operation
Room temperature
when started
About 25°C or higher
About 25°C - 23°C
About 23°C or lower
Operation mode
COOL
DRY
HEAT
Target temperature
(initial state)
About 24°C
Room temperature: N
About 25°C or higher
-»COOL
About 25°C - 23°C
-» DRY
About 23°C or lower
-»HEAT v
MSH-07/09/12RV
Operation
Indicator
COOL: When the room temperature is 2°C higher than the set temperature, the set temperature may not be changed
since the air conditioner is operating to reach the target (set) temperature. In this case, please wait until the
room temperature drops to within 2°C of the set temperature and then operate.
HEAT: When the room temperature is 2°C lower than the set temperature, the set temperature may not be changed
since the air conditioner is operating to reach the target (set) temperature. In this case, please wait until the
room temperature rises to within 2°C of set temperature and then operate.
Details of display on the indoor unit
The operation indicator at the right side of the indoor unit indi- _ ——-- (\
cates the operation state. £ . 1 % c
Lighting
-)=>- Blinking
CD Not lighting
MSH-18/24RV
Operation Indicator
0
Lighting
Blinking *
Not lighting
Operation indicator lamp
The following indication does not depend on the shape of lamp.
Operation state
Difference between target
temperature and room temperature
This shows that the air conditioner is operating to reach the
target temperature. Please wait until the target temperature
is obtained.
About 2 °C or more
This shows that the room temperature is approaching the
target temperature.
About 2 °C or less
(In case of outdoor unit MXZ series only)
Please refer to INFORMATION FOR MULTI SYSTEM AIR
CONDITIONER (page 8).*
Except MSH-24RV

MANUAL OPERATION (COOL, DRY, HEAT)
A MITSUBISHI ELECTRIC
O
i j~r
L /*c
C.CCK
PM
II I-1 It 1
IU ■ uu
ON/OFF TOO (’I")
U U WARM'A'COOL i
©:
ECONO COOL
0
FAN!
!i
MODE
| ®-*o
VANE
©START
1 l
©-*1
HR.
| | \
©stop:
min.:
BESET CLOCK
O O
:
( To select the COOL, DRY or HEAT mode i)
Press the ^ button.
ggf| Select the operation mode by pressing the
I | button.
Each time this button is pressed, the operation mode
is changed in sequence: (I FEEL...) -* 0 (COOL)
-» 6 (DRY) -» 0 {HEAT)
To stop operation:
Press the ^ button.
After the operation mode is set once, the operation
starts in the mode set previously from the next time
by simply pressing the % button.
When the set temperature is to be changed:
B Press the @ button to lower the temperature. One
press lowers the temperature by about 1 °C.
B Press the (?) button to raise the temperature. One
press raises the temperature by about 1°C.
In HEAT operation
B If the air conditioner absorbs too much heat from
the air, it may be overloaded. Following a judgement
made by the microprocessor, the fan in the outdoor
unit is automatically stopped to protect the air con¬
ditioner.
When the outdoor unit’s fan is stopped, frost may
form on the outdoor unit, but this is not a problem.
In DRY operation
II The temperature control (temperature setting) can¬
not be done.
0 The room temperature is slightly lowered in this op¬
eration mode.
The details of the display on the indoor unit are
explained on page 7.
— NOTE-
B When the ambient temperature is too high, the room tem¬
perature may not reach the set temperature since the
unit operates to cool under high load.
CONVENIENTINFORMATION ^
Ccooig ) For effective cooling
© Close the windows and pull
down blinds. Sunshine is re¬
duced and cooling efficiency
increases.
© Paste a heat shield film (gen¬
erally available) on the window.
Heat entering the room is re¬
duced.
© Block the outdoor unit from di¬
rect sunlight, This saves en¬
ergy.
Comfortable warmth depends on the temperature difference between the indoor and
the outdoor.
It is recommended that the set temperature in the heating operation does not differ from the external tem¬
perature too much. Though there is a regional difference, as a reference, a set temperature between about
22°C and 24°C is most suitable.
The humidity at which people feel comfortable
When air contains too much moisture, people feel clammy. Humidity is related to temperature and wind. The
humidity at which people feel comfortable is 60% - 75% RH in summer, 55% - 70% RH in winter,
INFORMATION FOR MULTI SYSTEM AIR CONDITIONER (OUTDOOR UNIT: MXZ
SERIES)
Multi system air conditioner (Outdoor unit: MXZ series) can connect two or more indoor units with one outdoor
unit. According to the capacity, two or more units can operate simultaneously.
El When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the
other for heating, the operation mode of the indoor unit that operates earlier is selected. The other indoor units that will
start the operation later cannot operate, indicating an operation state. (Refer to the table of Operation Indicator lamp
on page 7.)
In this case, please set ail the indoor units to the same operation mode.
B When indoor unit starts the operation white the defrosting of outdoor unit is being done, it takes a few minutes (max. 10
minutes) to blow out the warm air.
B In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant flowing
may be heard, they are not malfunction. The reason is that the refrigerant continuously Hows into it.

AIR FLOW VELOCITY AND DIRECTION ADJUSTMENT
AIR FLOW velocity and direction can be selected
as required.
X MITSUBISHI ELECTRIC
0
CLOCK
'T'
PM
in
nn
IU uu
on/off:
too m too
COOL
FAN
©STOP
Wm
( 1
1 a< °!
VANE
© START
[©-1
MODE
j-1
ECC\0 COOL ■ min-;
run
To change the AIR FLOW velocity, press
the r^i button.
Each time the button is pressed, the fan speed is
changed in sequence:« (Lo) (Med) *a0 (Hi)
-» © (AUTO)
® Use the (Hi) notch to cool/heat the room more.
* If the operating sound of the air conditioner disturbs your
sleep, use the - (Lo) notch.
To change the AIR FLOW blowing direc¬
tion vertically, press the button.
Each time the button is pressed, the angle of the hori¬
zontal vane is changed in sequence: " (1) «' (2)
<• (3) -> , (4) -» , (5) -» ^ (SWING) -» lg) (AUTO)
SWING OPERATION
Use the swing operation for the air flow to reach all corners
of the room.
Recommended horizontal vane
range
Use the <<© (AUTO) position usu¬
ally.
Use position - (1) or - (2) in the
COOL or DRY mode and use posi¬
tions * (3) to j (5) in the HEAT mode
when adjusting to your require¬
ments.
HEAT ■
vx
[— NOTE
In the cooling operation, when the air conditioner is op¬
erated with setting the horizontal vane to / (4) or, (5) for
1 hour, the AIR FLOW direction is automatically set to
horizontal to prevent condensed water from dropping.
Adjust the vertical AIR FLOW direction using the remote
controller. If the horizontal vane is moved manually, it
may cause trouble.
In the heating operation, if the air flow temperature is
too low or when defrosting is being done, the horizontal
vane position is set to " (1).
Auto air flow direction control operation
When the AUTO mode is selected with the □□ button, the position of the horizontal vane is automatically set
to correspond to the operation mode for effective operation.
(1) HEAT
When the air flow temperature is too low,
the air is blown out horizontally.
When the air flow temperature rises,
the air is blown out downwards.
(2) COOL, DRY
The air is blown out horizontally.
To change the horizontal direction of the air flow, move the vertical vane manu¬
ally.
Adjust the vane before operation starts.
Since the horizontal vane moves automatically, your fingers may be caught.
9

Wf/
ECONO COOL OPERATION
Use this operation when you want to be com¬
fortable in COOL made even with energy saved.
Perform the following operations while the N \
\ unit is operating. ;
A MITSUBISHI ELECTRIC
ON/OFF J83.(i), TO °
FAN ■ ©STOP
trja. ms
0-0
O 6
MODE
] m
e-o
VANE ©START
jiSL.1
© ■ *1
HR.
Ifevd
EC® COOL
fit 1
MIN.
1
fTH.* I RESET CLOCK
o o
Press the ^ button.
When the & (ECONO COOL) operation is selected in
COOL mode, the air conditioner performs swing op¬
eration in various cycle according to the temperature
of air conditioner.
Also SET TEMPERATURE is automatically set 2 °C
higher than in COOL mode.
To release the ECONO COOL operation:
Press the button again.
B ECONO COOL operation is available only in MANUAL COOL
mode.
VANE
E3 When the ["% | button is pressed or the operation mode is
changed during the ECONO COOL operation, ECONO COOL
operation is released.
m The [~%~T button, the @ or @ button and ON/OFF timer
(page 11) are available.
r— What is “ECONO COOL”?-
Swing air flow (change of air flow) makes you feel cooler
than constant air flow. So, even though the set tempera¬
ture is automatically set 2 °C higher, it is possible to oper¬
ate cooling operation with keeping comfort. As a result,
energy can be saved.
10

TIMER
It is convenient to set the timer when you go to
bed, when you get home, when you get up, etc.
How to set the ON timer
Press the button during operation.
Each time the button is pressed, the ON timer mode
alternates between ON and OFF.
|g| J Set the time of the timer using the ;— i
1E1 and | i buttons.
Each time the button is pressed, the set time in¬
creases by 1 hour; each time the □□ button is
pressed, the set time increases by 10 minutes.
To release the ON timer:
Press the button.
How to set the OFF timer
Press the button during operation.
Each time the button is pressed, the OFF timer mode
alternates between ON and OFF.
IOi Set the time of the timer using the r —i
KSi and buttons.
Each time the □□ button is pressed, the set time in¬
creases by 1 hour; each time the q button is
pressed, the set time increases by 10 minutes.
To release the OFF timer:
Press the jgg button.
Programming timer operation
The ON timer and the OFF timer can be used in combination.
The timer of the set time that is reached first will operate first,
(“if” mark indicates the order of timer operations.)
If the current time has not been set, the timer operation can¬
not be used.
SpWHEN THE AIR
7 TO BE USED FC
When it is not going to be used for a
lon ffime : V
Perform the FAN operation for 3 or 4 hours
to dry the inside of the air conditioner.
To perform FAN operation, set to the highest
temperature in the MANUAL COOL OPERATION mode.
(Refer to page 8.)
When the air conditioner is to be
juSedfggain:
Clean the air filter and install it in the in¬
door unit.
(Refer to page 12 for cleaning instructions.)
I Clean the fitter
| before installing.
Turn off the breaker and/or disconnect the
power supply plug.
Check that the air inlet and outiet of the
indoor/outdoor units are not blocked.
HD
A CAUTION
Disconnect the power supply plug or turn off the
breaker when the air conditioner is not going to be
used for a long time.
Dirt may collect and this may cause a fire.
Remove the batteries from the remote con¬
troller.
gj Check that the earth is connected correctly.
-A CAUTION-
Earth the unit.
Do not connect the earth to a gas pipe, water pipe, light¬
ning rod or the earth of a telephone. If the earthing is
incorrect, it may cause an electric shock.
A CAUTION
To prevent liquid leakage, take out all batteries when
the remote controller is not going to be used for a
long time.
11

Before starting maintenance
Cleaning the indoor unit
fojfl CLEANING THE AIR FILTER AND
aP / THE DEODORIZING FILTER
Do not open the front panel up past the level position in order to prevent it from being damaged.
- A CAUTION-
When the unit is to be cleaned, switch it off and dis¬
connect the power supply plug or turn off the
breaker. Since the fan rotates at high speed during
operation, it may cause an injury.
Do not use gasoline, benzine, polishing powder, deter¬
gent and insecticide.The unit may be damaged.
Cleaning the air filter
(about once every 2 weeks)
When the air filter is to be removed, do not touch
the metal parts of the indoor unit.
This may cause an injury.
Remove dirt from the air filter using a
vacuum cleaner or fay washing the filter
Cleaning the deodorizing filter
(about once every 2 weeks)
Remove the air filter, and then remove the
deodorizing filter (gray sponge type).
il The deodorizing filter is harmless to people.
However, to keep its effectiveness, be sure to
hold the frame and not to touch the surface
of the filter with your hand.
Deodorizing iilter
Soak the filter together with its frame in
lukewarm water for about 15 minutes.
with water.
8 If dirt is conspicuous, wash the filter with a
solution of detergent in lukewarm water.
B If hot water (50°C or more) is used, the filter
may be deformed.
After washing with water/I ukewarm water,
dry the air filter well in the shade.
S Do not expose the air filter to direct sunlight
or heat from a fire when drying it.
@ If the dirt is conspicuous, use a solution of
detergent in lukewarm water.
E3 If hot water (50°C or more) is used, the filter
may be deformed.
@ Do not use a scrubbing brush or sponge.This
may damage the surface of the filter.
m Do not use a chlorine detergent.
After washing with water/lukewarm water,
dry the deodorizing filter well in the shade.
H Do not expose the deodorizing filter to direct
sunlight or heat from a fire when drying it.
Install the deodorizing filter, and then in¬
stall the air filter.
Install.

1
^ ^ REPLACEMENT OF THE DEODORIZING FILTER/
M J AIR CLEANING F ILTER
Deodorizing filter replacement
(about once a year)
Remove the air filter.
Remove the deodorizing filter (gray
sponge type).
Deodorizing filter
Install a new deodorizing filter.
Install the air filter and securely close the
front panel.
Air cleaning filter replacement
(about once every 4 months)
Air filter ^
Remove the air cleaning filter (white bel¬
lows type).
Air cleaning filter
Install a new air cleaning filter.
Install the air filter and securely close the
front panel.
Deodorizing filter
0 Cleaning is necessary about once every 2 weeks.
However, if dirt is conspicuous, clean more often.
0 When the color of the filter is not restored even if the
filter is washed as the procedure shown on page 12
or when the filter becomes black, replace the filter
with a new one.
0 Standard interval for filter replacement is about 1
year.
Air cleaning filter
0 If the air cleaning filter is clogged, it may lower the
unit’s capacity or cause condensation at the air out¬
let.
0 The air cleaning filter is disposable.The standard us¬
able interval is about 4 months. However, if the color
of the filter turns to dark brown, replace the filter at
once.
Optional parts are available from your local dealer.
Model
Name of part~~~~~~~-^
MSH-07RV, MSH-09RV, MSH-12RV
MSH-18RV, MSH-24RV
DEODORIZING FILTER
MAC-1800DF
MAC-1600DF
AIR CLEANING FILTER
MAC-1300FT
MAC-1100FT
BEFORE CONTACTING THE SERVICE REPRE
SENTATIVE, CHECKTHE FOLLOWING AGAIN
The air conditioner
cannot be operated.
*
Check the following.
Cannot be cooled §§jj
or heated sufficiently.
Igv':
Check the followingJj
Is the temperature set¬
ting correct?
Isn’t the fuse blown?
Isn’t the ON-timer set?
tW
Isn’t the air filter dirty?
Isn’t the outlet of the out¬
door unit blocked?
Display of the remote con¬
troller does not appear (II,
II).The remote control sigf
nal cannot be received if
the remote controller is
not operated near the air
conditioner (H).
Check the following.
Aren’t the batteries ex¬
hausted?
Is the polarity (+, -) of the
batteries correct?
When a power failure
occurs.
To restart the unit, press the ON/
OFF button on the remote control¬
ler again after the restoration of the
power.
Even if the above items are checked, when the air conditioner does not recover from the trouble, stop using the
air conditioner and consult your dealer.
In the following cases, stop operation and consult your dealer.
The remote control signal may
not be received in a room where
an electronic ON/OFF type fluo¬
rescent lamp (inverter-type fluo¬
rescent lamp, etc.) is used.
In the region where the electric
wave is weak, when the air con¬
ditioner is operated, noise may
be generated in radio reception.
0 When thunder is heard, stop op¬
eration and disconnect the
power supply plug or turn off the
breaker. Otherwise, the electrical
parts may be damaged.
13

YOUTHINKTHATTROUBLE HAS OCCURRED
Question Answer (not a malfunction)
Question
Answer (not a malfunction)
The air conditioner
cannot be operated
for about 3 minutes
when restarted.
This protects the air conditioner according to instruc¬
tions from the microprocessor. Please wait.
Cracking sound is
heard.
The room smells
strange.
The fan stops
during the DRY
operation.
This sound is generated by the expansion/contraction
of the front panel, etc. due to change in temperature.
The air conditioner sucks in an odor adhering to the
wall, carpet, furniture, cloth, etc. and blows it out with
the air.
In DRY operation, the unit operates using the same
refrigerant circuit as in COOL operation. DRY opera¬
tion time has to be reduced in order to lower humidity
without much room temperature decreasing. So the
compressor sometimes stops, and at the same time
the indoor fan stops. This prevents water condensed
on the heat exchanger from evaporating again.
Water leak from the
outdoor unit.
The sound as
burbling is heard.
Air does not blow
out soon in the
heating operation.
The operation is
stopped for about
10 minutes in the
heating operation.
During COOL and DRY operations, pipe or pipe con¬
necting sections are cooled and this causes water to
condense.
In the heating operation, the defrosting operation makes
water frozen on the outdoor unit melt and drip down.
In the heating operation, water condensed on the heat
exchanger drips down.
This sound is heard when the outside air is absorbed
from the drain hose in turning on the range hood or
the ventilation fan and that makes water flowing in the
drain hose spout out.
This sound is also heard when the outside air blows
into the drain hose in case the outside wind is strong.
Please wait as the air conditioner is preparing to blow
out warm air.
Defrosting of the outdoor unit is being done (Defrost¬
ing operation).
Since this is completed in 10 minutes, please wait.
(When the external temperature is too low and humid¬
ity is too high, frost is formed.)
The sound of water
flowing is heard.
p5%I
The air flow
direction changes
during operation.
This is the sound of refrigerant flowing inside the air
conditioner.
This is the sound of condensed water flowing in the
heat exchanger.
This is the sound of the heat exchanger defrosting.
When the air conditioner is operated in COOL or DRY
mode, if the operation continues with air blowing down
for 1 hour, the direction of the airflow is automatically set
to horizontal to prevent condensed water from dropping.
In the heating operation, if the air flow temperature is
too low or when defrosting is being done, the horizon¬
tal vane position is automatically set to horizontal.
Hissing sound is
sometimes heard.
The room cannot be
cooled sufficiently.
This is the sound when the flow of refrigerant inside
the air conditioner is switched.
When a ventilation fan or a gas cooker Is used in a
room, the cooling load increases, resulting in an in¬
sufficient cooling effect.
When the outside air temperature is high, the cooling
effect may not be sufficient.
Mechanical sound
is heard from the
indoor unit.
This is the switching sound in turning on/off the fan or
the compressor.
14

Installation, relocation and inspection
Installation place
Avoid installing the air conditioner in the following
places.
© Where flammable gas could leak.
Guaranteed operating range
I— A CAUTION
Do not install the unit where flammable gas could
leak.
If gas leak and collect around the unit, it may cause an
explosion.
Where there is much machine oil.
Salty places such as the seaside.
Where sulfide gas is generated such as a hot spring.
Where oil is splashed or where the area is filled with
oily smoke.
Indoor Outdoor
Cooling
Upper limit
32 °C DB
23 °C WB
43 °C DB
Lower limit
21 °C DB
15 °C WB
21 °C DB
Heating
Upper limit
27 °C DB 21 °C DB
15 °C WB
Lower limit
20 °C DB
-8.5 °C DB
-9.5 °C WB
Electrical work
H Provide an exclusive circuit for the power supply of
the air conditioner.
U Be sure to observe the breaker capacity.
t— A WARNING-
o The customer should not install this unit.
If installation is done incorrectly, it may cause a
fire, an electric shock, or injury from the unit fall¬
ing, wafer leaking, etc.
© Do not use intermediate connection of the power
supply cord or the extension cord and do not
connect many devices to one AC outlet.
A fire or an electric shock may result from poor
contact, poor insulation, exceeding the permis¬
sible current, etc.
Consult your dealer.
Inspection and maintenance
m When the air conditioner is used for several seasons,
the capacity may be lowered due to dirt inside the
unit.
© Depending on the condition, an odor may be gener¬
ated or dehumidified water may not drain out
smoothly due to dirt, dust, etc.
© It is recommended that the unit be inspected and
maintained (charged) by specialist in addition to nor¬
mal maintenance. Consult your dealer.
Operating sound considerations
© Do not put an object around the air outlet of the out¬
door unit. This may lower the capacity or increase
the volume of the operating sound.
© If an abnormal sound is heard during operation, con¬
sult your dealer.
j— A CAUTION-
© Earth the unit.
Do not connect the earth to a gas pipe, water pipe,
lightning rod or the earth of a telephone.
If the earthing is incorrect, it may cause an elec¬
tric shock.
© Install an earth leakage breaker depending on the
place where the air conditioner is to be installed
(humid places, etc.).
If the earth leakage breaker is not installed, it may
cause an electric shock.
Relocation
© When the air conditioner is to be removed or re-in-
stalled because of rebuilding, moving, etc., special
techniques and work are required.
— A WARNING -
Repairs or relocation should not be done by the cus¬
tomer.
If this is done incorrectly, it may cause a fire, an elec¬
tric shock, or an injury from the unit falling, water
leaking, etc. Consult your dealer.
jjDisposal
To dispose of this product, consult your dealer.
If you have any questions, consult your dealer. J)

HEAD OFFICE MITSUBISHI DENKI BLDG. MARUNOUCHI TOKYO 100-8310 TELEX J24532 CABLE MELCO TOKYO
SG79A607H01