Hitachi RAK-15QEF User manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
SERVICE MANUAL
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
CONTENTS
SPECIFICATIONS ----------------------------------------------------------------
HOW TO USE ----------------------------------------------------------------------
CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------------------
MAIN PARTS COMPONENT --------------------------------------------------
WIRING DIAGRAM ---------------------------------------------------------------
CIRCUIT DIAGRAM --------------------------------------------------------------
BLOCK DIAGRAM ----------------------------------------------------------------
BASIC MODE ----------------------------------------------------------------------
REFRIGERATING CYCLE DIAGRAM --------------------------------------
DESCRIPTION OF MAIN CIRCUIT OPERATION ------------------------
SERVICE CALL Q & A ----------------------------------------------------------
PROCEDURE FOR DISASSEMBLY AND REASSEMBLY -----------
PARTS LIST AND DIAGRAM --------------------------------------------------
RAR-7PE1
INDOOR UNIT
RAC-18WEF,RAC-25WEF,RAC-35WEF,RAC-50WEF（JCH-WH NO.0132E）
for items not described in this manual.
Johnson Controls-Hitachi Air Conditioning Wuhu Co., Ltd.
SPECIFICATIONS
RAK-15QEF
RAK-18REF
RAK-25REF
RAK-50REF
RAK-25REFC
RAK-35REFC
RAK-35REF RAK-50REFC
RAK-15QEF
RAK-18REF
RAK-25REF
RAK-50REF
RAK-25REFC
RAK-35REFC
RAK-35REF RAK-50REFC
80
40
54
42
38
25
24
23
21
20
19
8
6
NO.0131EJCH-WH
INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
RAK-18REF RAC-18WEF RAK-25REF
RAK-25REFC RAC-25WEF RAC-35WEF
RAK-35REF
RAK-35REFC
RAK-50REF
RAK-50REFC RAC-50WEF
(KW)
(B.T.U./h)
(KW)
(B.T.U./h)
W 780 660([phone]([phone]([phone](+91)
H 280 530 280 530 280 530 280 600
D 215 278([phone]([phone]([phone](+47)
MODEL
POWER SOURCE
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
COOLING
HEATING
TOTAL INPUT (W
TOTAL AMPERES (A)
CAPACITY
1,090 (250 1,460)
DIMENSIONS
(mm)
1,560 (500 2,100)
3.19-3.05
2.00 (0.90 2.50)
6,820 (3,070 8,530)
620 (250 970)
2.50 (0.90 3.20)
3.62-3.46
7.7 23.7 7.7 23.7 7.7 25.0 39.5
8,530 (3,070 10,920)
880 (250 1,250)
NET WEIGHT (Kg)
TYPE DC INVERTER
V032-022,zH05,ESAHP1 V032-022,zH05,ESAHP1 V032-022,zH05,ESAHP1 V032-022,zH05,ESAHP1
580 ( 700 (250 1,290)1,010)
4.56-4.36
3.40 (0.90 4.40)
11,600 (3,070 15,010)
5.41-5.18
1,100 (250 1,700)
5.56-5.31
14,330 (3,070 17,060)
3.84-3.67
2.50 (0.90 3.10)
8,530 (3,070 10,580)
7.16-6.85
3.50 (0.90 4.00) 5.00 (1.90 5.20)
11,940 (3,070 13,650) 17,060 (6,480 17,740)
20,470 (7,510 24,910)
7.62-7.29
1,660 (500 2,750)
4.20 (0.90 5.00) 6.00 (2.20 7.30)
250
8.2
1

 

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
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# $
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
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#
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DANGER
2

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS
1. Scope
The standards provide for items to be generally observed in carrying and handling semiconductors in
relative manufactures during maintenance and handling thereof. (They apply the same to handling of
abnormal goods such as rejected goods being returned.)
2. Object parts
(1) Microcomputer
(2) Integrated circuits (I.C.)
(3) Field effective transistor (F.E.T.)
(4) P.C. boards or the like to which the parts mentioned in (1) and (2) of this paragraph are equipped.
3. Items to be observed in handling
(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled in
the same way.)
(2) When any part is handled uncovered (in counting, packing and the like), the handling person must
always use himself as a body earth. (Make yourself a body earth by passing one M ohm earth
resistance through a ring or bracelet.)
(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is
being taken.
(4) Be sure to place a part on a metal plate with grounding.
(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time,
try to repair the printed circuit board on a grounded metal plate.
HITACH I IC401TH 1 ,188UV
Fig. 1 Conductive container
A conductive polyvinyl bag
IC
IC
Conductive sponge
Fig. 2 Body earth
Body earth (Elimik conductive band)
Clip for connection with
a grounding wire
1MΩ
3

(6) Use a three wire type soldering iron including a grounding wire.
Fig.4 Grounding a solder iron
Use a high insulation mode (100V, 10MΩor higher) when ordinary iron is to be used.
(7) In checking circuits for maintenance, inspection, or some others, be careful not to have the test probes
of the measuring instrument short circuit a load circuit or the like.
Bare copper wire (for body earth)
Metal plate (of Al. stainless steel, etc.)
Working table
Resistor 1MΩ(1/2W)
Earth wire
Staple
Fig.3 Grounding of the working table
soldering iron
Grounding wire
Screw stop at the screwed
part using a rag plate
4

1. In quiet or stop operation, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally,
but this noise is not abnormal for the operation.
2. When it thunders near by, it is recommend to stop the operation and turn off the circuit break er for safety.
3. In the event of power failure,the room air conditioner will restare automatically in the previously
mode once the power is restored. In the event of power failure during TIMER operation, the room air comditioner
will not start automatically. Re-press ON/OFF button after 3 minutes from when the unit off or power recovery.
4. If the room air conditioner is stopped by adjusting thermostat, or missoperation, and re-start in a moment,
there is occasion that the cooling and heating operation does not start for 3 minutes, it is not abnormal and
this is the result of the operation of IC delay circuit. This IC delay circuit ensures that there is no danger of
blowing fuse or damaging parts even if operation is restarted accidentally.
5. This room air conditioner should not be used at the cooling operation when the outside temperature is
below -10°C (14°F).
6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below
–15°C (5°F).
If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency falls.
7. When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is not
trouble that at this time fan stops and the vapour may rise from the outside heat exchanger.
!
CAUTION
selected
5

SPECIFICATIONS
38W (DC340 V)
RAK-15QEF,RAK-18REF,RAK-25REF,RAK-35REF
RAK-50REF,RAK-25REFC,RAK-35REFC,RAK-50REFC
6

Figure showing the installation of lndoor unit
MODEL RAK-15QEF
RAK-18/25/35/50REF
RAK-25/35/50REFC
above
50mm
above
50mm
above 50mm
about 300mm
about 450mm
must not bend
The indoor piping
should be insulated
with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commercial
products.)
2300 mm or more
Be sure to
completely
seal any
gap with
putty.
7

Remote Controller Manual
Remote Controller manual
Page 1~12
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
MODEL
RAR-7PE1
-1-
<0016692Y>
NAMES AND FUNCTIONS OF REMOTE CONTROLLER
This controls the operation function and timer setting of the room air conditioner. The range of control
is about 7 meters. lf indoor lighting is controlled electronically, the range of control may be shorter.
Precautions for Use
• Do not put the remote controller under direct sunlight and high temperature.
• Do not drop it on the floor, and protect it from water.
• If you press the FUNCTION button during operation, the air conditioner may stop for about 3 minutes
for protection before you can start it again.
Signal Transmission
MODE selector Button
Use this button to select the
operating mode. Every time
you press this button, the
mode will change from
(AUTO) (HEAT)
(DEHUMIDIFY)
(COOL) and (FAN)
cyclically.
(
Page 3)
ECO Button
Use this button to set the
ECO mode.
(
Page

)
TIMER OFF Button
Select the turn OFF time.
(
Page

)
TIMER ON Button
Select the turn ON time.
(
Page

)
POWERFUL Button
Press this button to start
powerful operation.
(
(
Page

)
Transmission Sign
Th
e
tra
ns
missio
n
sign blinks
when
a signal
has
bee
n
send.
ON/OFF Button
Press this button to start
operation.
Press it again to stop operation.
( Page
( Page

)
TEMPERATURE Button
Room temperature setting.
Value will change quic
k
er when
keep pressing.
(
Page 3)
FAN SPEED Button
Select the
f
an speed
f
or
cooling
and heating mode.
(
Page

)
UP/DOWN Button
Control the angle of the
horizontal air deflector.
(
(
Page

)
LEAVE HOME Button
(
Page

)
FROST WASH/CLEAN
Button
(
Page

)
-2-
8

AUTOMATIC OPERATION
The device will automatically determine the mode of operation, HEAT or COOL depending on the current room
temperature. The selected mode of operation will change when the room temperature varies.
However, the mode of operation will not change when indoor unit is connected to multi type outdoor unit.
VARIOUS FUNCTIONS
■Auto Restart Control
●
If there is a power failure, operation will be automatically restarted when the power is resumed with previous
operation mode and airflow direction.
(As the operation is not stopped by remote controller.)
●
If you intend not to continue the operation when the power is resumed, switch off the power supply.
When you switch on the circuit breaker, the operation will be automatically restarted with previous operation
mode and airflow direction.
Note: 1. If you do not require Auto Restart Control, please consult your sales agent.
2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.
■
As the settings are stored in the memory of the remote controller,
you only have to press the
(ON/OFF) button next time.
Press the MODE selector button so that the display indicates
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
the (AUTO) mode of operation.
●
When AUTO has been selected,
t
he
de
vice
will
a
ut
o
ma
tic
al
ly
determine the mod
e
of ope
ra
tio
n,
HEAT
o
HEAT
HEAT
r COOL
d
e
pe
n
di
ng
on
the c
ur
r
ent r
oom
t
em
pe
ra
tu
r
e. H
owever
th
e m
od
e of
operation will not change when indoor unit is connected to
multi type outdoor unit.
●
If the mode automatically selected by the unit is not
satisfactory, manually change the mode setting (HEAT,
DEHUMIDIFY, COOL or FAN).
Press the (FAN SPEED) button to select AUTO, HIGH, MED,
LOW or SILENT.
Press the
(ON/OFF) button.
Operation starts with a beep.
Press the button again to stop operation.
Set the desired room temperature with the TEMPERATURE
buttons (the display indicates the setting).
The temperature setting and the actual room temperature may
vary depending on conditions.
1
2
3
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
(AUTO)
(HIGH)
(MED)
(SILENT)
(LOW)
(AUTO)
(HIGH)
START
STOP
Temperature range can be set between 16°C and 32°C.
-3-
HEATING OPERATION
●
Use the device for heating when the outdoor temperature is under 21°C.
When it is too warm (over 21°C), the heating function may not work in order to protect the device.
●
In order to keep reliability of the device, please use this device above –15°C of the outdoor
temperature.
Defrosting will be performed about once an hour when frost forms on the heat exchange of the
outdoor unit, for 5~10 minutes each time.
During defrosting operation, the operation lamp blinks in cycle of 2 seconds on and 1 second off.
The maximum time for defrosting is 20 minutes.
However, if the indoor unit is connected to multi type outdoor unit, the maximum time for defrosting
is 15 minutes.
(If the piping length used is longer than usual, frost will likely to form.)
Defrosting
■
Press the MODE selector button so that the display indicates
(HEAT).
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
(AUTO)
(HIGH)
(MED)
(SILENT)
(LOW)
Set the desired room temperature with the TEMPERATURE buttons
(the display indicates the setting).
The temperature setting and the actual room temperature may
vary depending on conditions.
Temperature range can be set between 16°C and 32°C.
Press the
(ON/OFF) button. Heating operation starts with
a beep. Press the button again to stop operation.
■
As the settings are stored in the memory of the remote controller, you
only have to press the
(ON/OFF) button next time.
■
During AUTO fan, the fan speed automatically changes as below:
●
When the difference between room temperature and setting temperature
is large, fan starts to run at HI speed.
●
After room temperature reaches the preset temperature, fan speed
will be changed to lower speed to obtain optimum room temperature
condition for natural healthy heating.
1
2
3
(AUTO)
(HIGH)
START
STOP
-4-
9

DEHUMIDIFYING OPERATION
■Dehumidifying Function
Use the device for dehumidifying when the room temperature is over 16°C.
When it is under 15°C, the dehumidifying function will not work.
●
When the room temperature is higher than the temperature setting: The device will dehumidify the room,
reducing the room temperature to the preset level.
When the room temperature is lower than the temperature setting: Dehumidifying will be performed at the
temperature setting slightly lower than the current room temperature, regardless of the temperature setting.
●
The preset room temperature may not be reached depending on the number of people present in the room
or other room conditions.
Set the desired room temperature with the ROOM
TEMPERATURE setting buttons (the display indicates the
setting).
The range of 20˚C to 26˚C is recommended as
the room temperature for dehumidifying.
Temperature range can be set between 16°C and
32°C.
Press the
(ON/OFF) button. Dehumidifying operation
starts with a beep. Press the button again to stop operation.
■
As the settings are stored in the memory of the remote controller, you
only have to press the
(ON/OFF) button next time.
STA
RT
STO
P
Press the MODE selector button so that the display
indicates
(DEHUMIDIFY).
The fan speed is set at LOW.
Press (FAN SPEED) button to select SILENT or LOW fan
speed.
1
2
-5-
COOLING OPERATION
Use the device for cooling when the outdoor temperature is -10 to 46°C.
If humidity is very high (over 80%) indoors, some dew may form on the air outlet grille of the indoor unit.
Press the MODE selector button so that the display indicates
(COOL).
■
As the settings are stored in memory in the remote controller, you only
have to press the
(ON/OFF) button next time.
1
2
3
Set the desired FAN SPEED with the (FAN SPEED) button (the
display indicates the setting).
Set the desired room temperature with the TEMPERATURE buttons
(the display indicates the setting).
The temperature setting and the actual room temperature may vary
d
e
p
e
n
d
i
n
g
o
n
c
o
n
d
i
t
i
o
n
s
.
Press the
(ON/OFF) button. Cooling operation starts with a
beep. Press the button again to stop operation. The cooling function
does not start if the temperature setting is higher than the current
room temperature (even though the
(OPERATION) lamp lights).
The cooling function will start as soon as you set the temperature
below the current room temperature.
STA
RT
STO
P
■
During AUTO fan, the fan speed automatically changes as below:
●
When the difference between room temperature and setting tem-
perature is large, fan starts to run at HI speed.
●
After room temperature reaches the preset temperature, fan speed
will be changed to lower speed to obtain optimum room temperature
condition for natural healthy cooling.
(AUTO)
(HIGH)
(MED)
(SILENT)
(LOW)
(AUTO)
(HIGH)
Temperature range can be set between 16°C and 32°C.
-6-
10

FAN OPERATION
User can use the device simply as an air circulator.
STA
RT
STO
P
1
2
Press the MODE selector button so that the display indicates
(FAN).
Press the
(ON/OFF) button. Fan operation starts with a beep.
Press the button again to stop operation.
Press the (FAN SPEED) button.
(HIGH)
(MED)
(MED)
(LOW)
(LOW)
(SILENT)
(HIGH)
(MED)
(LOW)
Timer Reservation
OFF TIME setting
• Select the OFF TIME by pressing the
Button.
• Setting time will change according to the below
sequence when you press the button.
1 hour interval
TIMER RESERVATION
ON Timer and OFF Timer are available.
2
1
ON TIME setting
• Select the ON TIME by pressing the Button.
• Setting time will change according to the below
sequence when you press the button.
Timer off
1 hour interval
Timer on
Operation stop at setting time
Operation will start for setting
temperature at setting time.
-7-
POWERFUL OPERATION
• During POWERFUL operation, cooler or warmer air will be blown out from indoor unit for COOLING or
HEATING operation respectively.
NOTE
• During POWERFUL operation, capacity of the air conditioner will not increase
– if the air conditioner is already running at maximum capacity.
– just before defrost operation (when the air conditioner is running in HEATING operation).
• After auto restart, POWERFUL operation is cancelled and previous operation shall start.
•
Press the (POWERFUL) button during operation.
• "
" is displayed on the LCD.
" is displayed on the LCD.
POWERFUL operation ends in 20 minutes. Then the system
automatically operates with the previous settings used before
POWERFUL operation.
START
Press the (POWERFUL) button again.
• "
" disappears from the LCD.
" disappears from the LCD.
CANC
EL
•
Press the (ON/OFF) button. or
Press the (ON/OFF) button. or
Press the (ON/OFF) button. or
• When ECO mode, or LEAVE HOME mode is selected, POWERFUL operation is cancelled.
LEAVE HOME(LH) OPERATION
NOTE
• During Leave Home operation, fan speed and horizontal air deflector position cannot be changed.
Prevent the room temperature from falling too much when no one is at home .The initial setting
temperature is 10
đ
and the temperature range can be set between 10
đ
and 16
đ
.
Press (LEAVE HOME) button during stop or
operation.
Room temperature is set at 10
đ
and heating operation
starts.
S
et
t
et
et
he
de
si
r
ed
ro
om temperat
ur
e
wit
h
t
he
T
EMPERA
T
UR
E
buttons.Temperature range can be set between 10
đ
and 16
đ
• " ", " ", " ", "SET TEMPERATURE" is
displayed on the LCD.
Press the (STOP) button.
Change to other Operation Mode.
1
2
START
CANCEL
-8-
operation, the air conditioner performs at maximum power.
By pressing
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
(POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING, FAN, AUTOMATIC
For multi model connections, POWERFUL operation may not function depending on operation conditions.
●
11

●The dust and dirt adhering to indoor heat exchanger which is the cause of the smell. They are
washed away
by freezing and thawing of the heat exchanger.
●
※
It depends on the conditions of the room.
The process of Frost Wash
About 8 min
About 20 min to 90 min.
Operation such as
cooling operation
Freezing and thawing heat exchanger
Auto Stop
Running
Stop
The upper and lower deflector(s) remain open during fan operation, freezing, thawing.
●
lamp on the indoor unit lights up during Frost Wash operation.
●When pressing the button such as cooling during Frost Wash operation, Frost Wash
operation
is discontinued
and
start the cooling operation after about 3 minutes.
●
When Frost Wash is stopped during Frost Wash operation, the unit automatically restart Frost Wash operation
●In order to protect the product, Frost Wash function cannot be carried out again for about 60 minutes after
Frost Wash operation is completed.
Frost Wash start
Frost Wash end
at
the next operation stop.
" "
Frost Wash function can work when the outdoor temperature is 1ȭZU43ȭ
and Indoor humidity is 30% to 70%.
Fan operation
FROST WASH OPERATION
(For single model connection)
■Frost Wash (Manual mode)
When the unit is off, press (Frost Wash/Clean) button, manual Frost Wash will start.
■How to start and cancel Frost Wash (Manual mode).
●Press (Frost Wash/Clean) button, " " is displayed on the LCD. Frost
Wash operation will start. " " lamp on the indoor unit lights up.
●After one hour, " " disappears from the LCD. After about two hours, the
indoor unit will stop Frost Wash operation.
●In order to protect the product, Frost Wash function cannot be carried out
again for about 60 minutes after the Frost Wash operation is completed.
●Press the (
ON/OFF
) button, the operation will stop.
" " lamp on the indoor unit turns off.
2
1
Precautions for Use
●
Do not open windows or doors during frost wash operation. Water will condense on the air deflector and
●Do not open or remove the front panel during Frost Wash operation. It may cause injury or malfunction.
●
Frost Wash operation does not wash away all dust and dirt.
●
If the air conditioner is continuously running, Frost Wash function is not effective.
●
During Frost Wash operation, if power is turned off and then power is restored, Frost Wash function will
●
●
After turning on the power, please wait a moment if you want to start Frost Wash. Hissing, fizzy or squeaking noise may generate during Frost Wash operation.
not restart.
drips down occasionally. This will wet your furniture.
-9-
CLEAN (ONE TOUCH CLEAN) OPERATION
Drying indoor heat exchanger after cooling operation to prevent mildew.
■To start CLEAN operation ■To cancel CLEAN operation
NOTE
●
When CLEAN operation finish, unit will switch OFF automatically.
●
If Timer is set, there is a need to cancel those timer before operating CLEAN function.
●
For multi connections, when pressing (Frost Wash/Clean) button, operation is limited to FAN
●
For multi connections, when one room operates CLEAN operation fi rst, other rooms can operate
COOLING, DEHUMIDIFYING or FAN operation. However, when other rooms need to operate HEATING
operation, air conditioner will be in STANDBY mode. After CLEAN operation fi nish, HEATING operation
will start.
(For multi model connections)
●
Press
(ON/OFF) button.
2
operation.
●
Press (Frost Wash/Clean) button when unit is OFF.
Total time taken for One Touch Clean operation is 60 minutes.
During this operation, FAN operation shall operate,
" " is displayed on the LCD.
" " is displayed on the LCD.
" " is displayed on the LCD.
" " is displayed on the LCD.
" " is displayed on the LCD.
" " is displayed on the LCD.
" " is displayed on the LCD.
1
" " lamp on the indoor unit lights up,
- 10 -
12

ECO OPERATION
Energy saving operation by changing set temperature and by limiting the maximum power consumption
value.
Press (ECO) button during operation.
• " " is displayed on the LCD.
• Energy saving operation will start by changing
the set temperature higher or lower and saving
operation power consumption.
ST
AR
ST
ST
T
Press (ON/OFF) button.
• Press (ECO) button again.
• " " disappears from the LCD.
CANCE
L
NOTE
• In case the power consumption is already low,ECO operation will not reduce the power
consumption.
• By pressing (POWERFUL) button, ECO operation is cancelled.
• After auto restart, ECO operation is cancelled and previous operation mode shall start.
By pressing the (ECO) button during Heating,
Automatic, dehumidifying or Cooling operation,
the air conditioner performs the “ECO” operation.
- 11 -
ADJUSTING THE AIRFLOW DIRECTION
HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER
1
2
Remove the cover as shown in the figure and take out
the old batteries.
Push and pull to the
dirction of arrow
Install the new batteries.
The direction of the batteries should match the marks
in the case.
1. Do not use new and old batteries, or different kinds of
batteries together.
2. Take out the batteries when you do not use the remote
controller for 2 or 3 months.
CAUTION
CAUTION
2
1
Adjust the airflow upward and downward.
According to operation, the horizontal air deflector is automatically
set to the proper angle suitable for each operation.The deflector
can be swings up and down and also set to the desired angle using
the “
(AUTO SWING)” button.
• If the “
(AUTO SWING) ” button is pressed once, the
horizontal air deflector swings up and down.If the button is
pressed again, the deflector stops in its current position.
Several seconde (about 6 seconds) may be required before
the deflector starts to move.
• When the operation is stopped, the horizontal air deflector
moves and stops at the position where the air outlet closes.
• In “Cooling” operation, do not keep the horizontal air deflector
swinging for a long time. Some dew may form on the horizontal
air deflector and some dew may drop from it.
Adjust the airflow to left and right.
Hold the vertical air deflector as shown on the right and
adjust the airflow to left and right.
- 12 -
13

Pay special attention to signs of “
Warning
Warning
” and “
Caution
”. The “Warning” section contains matters which, if
not observed strictly, may cause death or serious injury. The “Caution” section contains matters which may result
in serious consequences if not observed properly. Please observe all instructions strictly to ensure safety.
The signs indicate the following meanings. (The following are examples of signs.)
WARNING
SAFETY PRECAUTION
Do not reconstruct the unit.
Water leakage, fault, short circuit or fire may occur if you reconstruct the unit by
yourself.
Please ask your sales agent or qualified technician for the installation of your unit.
Water leakage, short circuit or fire may occur if you install the unit by yourself.
Please use earth line.
Do not place the earth line near water or gas pipes, lightning-conductor, or the
earth line of telephone. Improper installation of earth line may cause electric
shock or fire.
B
e
s
u
r
e
t
o
u
s
e
t
h
e
s
p
e
c
i
f
i
e
d
p
i
p
i
n
g
s
e
t
f
o
r
.
O
t
h
r
w
i
s
h
i
m
a
r
e
l
t
i
n
broken copper pipes or faults.
A circuit breaker should be installed depending on the mounting site of the unit.
Without a circuit breaker, the danger of electric shock exists.
Please ensure smooth flow of water when installing the drain hose.
Make sure that a single phase power source is used.
The use of other power sources may cause electrical components to overheat
and lead to fire.
PRECAUTIONS DURING INSTALLATION
PROHIBITION
CONNECT EARTH LINE
PROHIBITION
WARNING
CAUTION
Please contact your agent for maintenance. Improper self maintenance may cause electric
shock and fire.
Please contact your agent if you need to remove and reinstall the unit. Electric shock or fire
may occur if you remove and reinstall the unit yourself improperly.
PRECAUTIONS DURING SHIFTING OR MAINTENANCE
“OFF”
PROHIBITION
Make sure that a single phase power source is used.
Make sure that a single phase power source is used.

Please keep this manual after reading.
Make sure to connect earth line.
Indicates the instructions that must be followed.
Indicates the instructions that must be followed.
This sign in the figure indicates prohibition.
Do not install the unit near a location where there is flammable gas.
The outdoor unit may catch fire if flammable gas leaks around it.
Should abnormal situation arise (like burning smell), please stop operating the
unit and turn off the circuit breaker. Contact your
fire may occur if you continue to operate the unit
under abnormal situation.
agent. Fault, short circuit or
PRECAUTIONS DURING OPERATION
WARNING
Do not use any conductor as fuse wire, this could cause fatal accident.
Du
r
ing
thu
n
de
r
storm,
dis
conne
ct the
plug
to
p
an
d turn off t
he
ci
rcuit
breaker.
Do not put objects like thin rods into the panel of blower and suction side
because the high-speed fan inside may cause danger.
Spray cans and other combustibles should not be located within a meter of the
air outlets of both indoor and outdoor units.
As a spray can’s internal pressure can be increased by hot air, a rupture may result.
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
“OFF”
Avoid an extended period of direct air
fl
ow for your health.
! Do!not!use!refrigerant!other!than!the!one!indicated!on!the!outdoor!unit!(R32)!when!installing,!
Using!other!refrigerants!may!cause!trouble!or!damage!to!the!unit,!and!personal!injury.
moving!or!repairing.!
.
.
O
O
O
t
t
h
h
h
e
e
r
r
w
w
i
i
s
s
e
e
,
,
t
t
t
h
h
h
i
i
s
s
m
m
a
a
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r
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e
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3
2
Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. This appliance is filled with R32.
-2-
.stnalpehtrofdabsitisawolfriaehtrednuyltceridstnalpecalptonoD
Do not direct the cool air coming out from the air-conditioner panel to face
household heating apparatus as this may affect the working of apparatus such
as the electric kettle, oven etc.
tondnanoitacificepsrerutcafunamehtrednudetarepoebllahstcudorpehT
for any other intended use.
PRECAUTIONS DURING OPERATION
CAUTION
Do not attempt to operate the unit with wet hands, this could cause fatal
accident.
When operating the unit with burning equipments, regularly ventilate
.ycneiciffusninegyxodiovaotmooreht
tuohtiwdnamrif,elbatssyawlasiemarfgnitnuomroodtuotahterusneesaelP
defect. If not, the outdoor unit may collapse and cause danger.
Do not wash the unit with water or place a water container such as a vase on
the indoor unit.
Electrical leakage could be present and cause electric shock.
Be sure to stop the operation by using the remote controller and turn off the
circuit breaker during cleaning, the high-speed fan inside the unit may cause
danger.
Turn off the circuit breaker if the unit is not be operated for a long period.
Do not climb on the outdoor unit or put objects on it.
When operating the unit with the door and windows opened, (the room
g
nivomronwodgnicafrotcelfedriaehthtiwdna)%08evobasyawlasiytidimuh
automatically for a long period of time, water will condense on the air de
fl
ector
and drips down
occasionally. This will wet your furniture. Therefore, do not
operate under such condition for a long time.
If the amount of heat in the room is above the cooling or heating capability of
the unit (for example: more people entering the room, using heating equipments
and etc.), the preset room temperature cannot be achieved.
Indoor unit cleaning must be performed by authorized personnel only. Consult
your sales agent.
Using a commercially available detergent or similar can damage the plastic parts
or clog the drain pipe, causing water to drip with potential electric shock hazard.
r
oodtuoehtfonifmuinimuladnaecafrusmottob,teltuoriaehthcuottonoD
unit.
You may get hurt.
Do not touch the refrigerant pipe and connecting valve.
Burns may result.
PROHIBITION
DON’T WET
PROHIBITION
PROHIBITION
PROHIBITION
DON’
T
TOUCH
“OFF”
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
DON’
T T
OUCH
STRICTLY OBSERVE
PRECAUTIONS
This appliance is not to be used by children or persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction. Children must be supervised not to play with the appliance.
-3-
14

NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT
OPERATING RANGE
Operation mode
Operation mode
Cooling / Dehumidifying
Cooling / Dehumidifying
Heating
Heating
C°12ot51-
-10 to 4

°C
erutarepmetroodtuO
erutarepmetroodtuO
Air filter
To prevent dust from coming into the indoor unit.
(Refer page 6)
Front panel
(Refer page 7)
Indoor unit indicators
Light indicator showing the operating condition.
(Refer page 5)
Horizontal deflector Vertical deflector
(Air Outlet)
Remote controller
operate the whole unit.
MODEL NAME AND DIMENSIONS
NOTE FOR MULTI SYSTEM
Several indoor units can be connected to one outdoor unit.
You can operate only one unit or several units according to your needs.
Combination of operations:
When operation mode is selected:
You cannot operate the indoor units in the
following combinations.
One unit Other unit
One unit Other unit
Heating
Cooling
Dehumidifying
Fan
During automatic operation
The indoor unit which is turned on first continues to
operate. Other indoor units which are turned on later
go into standby mode and the operation lamp lights.
To operate the indoor units turned on later, set the
operation mode as same as the indoor unit turned
on first.
When heating operation is automatically selected for the first indoor unit, the next indoor unit will then start to
heat. Also, if cooling or dehumidifying is automatically selected for the first indoor unit, the next indoor unit will
also start to cool or dehumidify.
Adjusting the number of indoor units:
Decrease the number of indoor
units to be operated especially
when it is very hot or very cold
or when you want to reach the
preset temperature quickly.
Stopped indoor units:
When an indoor unit is operated in the cooling,
heating or dehumidifying mode in one room,
the sound of refrigerant flow may be heard
from a stopped indoor unit or a stopped indoor
unit may become warm. This is because the
indoor unit returns refrigerant to the outdoor
unit to be ready for operation.
-4-
MODEL
WIDTH (mm) HEIGHT (mm) DEPTH (mm)
WIDTH (mm) HEIGHT (mm) DEPTH (mm)
WIDTH (mm) HEIGHT (mm) DEPTH (mm)
780
280
215
RAK-15QEF, RAK-18REF, RAK-25REF, RAK-25REFC
RAK-35REF, RAK-35REFC, RAK-50REF, RAK-50REFC
NA ES AND FUNCTIONS OF EACH PART
INDOOR UNIT INDICATIONS
TIMER LAMP (Orange)
This lamp lights when the
timer is working.
OPERATION LAMP (Yellow)
This lamp lights during operation.
The
OPE
RA
TI
RA
RA
ON LAMP fl
as
hes
in t
he
f
ol
lowing cases during
heating.
(1) During preheating
For about 2-3 minutes after
starting up.
(2) During defrosting
D
ef
r
ost
ing
wil
l be performed
about once an hour when frost
forms on the heat exchanger
of the outdoor unit, for 5-10
minutes each time.
TEMPORARY SWITCH
If the power stays on and the unit is not operated, power is slightly consumed in the control circuit.
The power is saved by turning off the power switch (or the circuit breaker when the power is supplied
from the outdoor unit).
Use this switch to start and stop when the remote
controller does not work.
By pressing the temporary switch, the operation is
done in automatic mode.
When the operation is done using the temporary
switch after the power source is turned off and turn
on again, the operation is done in automatic mode.
CAUTION
Turn off the circuit breaker if the
unit
is n
o
t be op
e
ra
ted f
or
a
or
or
l
ong
period.
Frost Wash Lamp(Green)
-5-
15

AINTENANCE
leaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
CAUTION
1. AIR FILTER
Please clean the filter once about every two weeks. By
doing so, the power rates are saved. In
case the air filter is full of dust, the air flow will decrease and the cooling capacity will be reduced.
Further, noise may occur. Be sure to clean the filter following the procedure below.
PRO EDURE
1
Open the front panel carefully and remove the filter.
2
2
Vacuum dust from the air filter using vacuum cleaner.
If there is too much dust, wash the filter with a detergent
and rinse it thoroughly. After that, dry it in the shade.
3
3
s
Set the filter with “FRONT” mark facing front, and
slot them into the original state.
s
After attaching the filters, push the front panel at
three arrow portions as shown in figure and close
it.
s
Do not wash with hot water at more than 40° . The filter may shrink.
s
When washing it, shake off moisture completely and dry it in the shade; do not expose it directly
to the sun. The filter may shrink.
s
Don't operate the unit without filter. Fault may occur if you continue.
CAUTION
-6-
2. CLEANING OF FRONT PANEL
Remove the front panel and wash with clean water.
Wash it with a soft sponge.
After using neutral detergent, wash thoroughly with
clean water.
When front panel is not removed, wipe it with a soft
dry
cloth
.
Wipe
the
re
mote
co
n
trolle
r
thoroughl
y
wit
h
a soft dry cloth.
Wipe the water thoroughly.
If water remains at indicators or signal receiver of
indoor unit, it causes trouble.
CA
UTIO
N
Do not splash or direct water to the body of the unit when cleaning it as
this may cause short circuit.
Never use hot water (above 40°C), benzine, gasoline, acid, thinner or a
brush, because they will damage the plastic surface and the coating.
3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD
Run
the
unit
by
settin
g
the
ope
r
ation
mode
to
(FAN) and the fan speed to HI for about half a day
on a fine day, and dry the whole of the unit.
Switch
off
the
pow
er
plug
or
tu
rn
off
the
circuit
brea
ker.
B
E
N
Z
I
N
E
T
H
I
N
N
E
R
A
C
I
D
Air
Blow
Be sure to hold the front panel with both hands to
detach and attach it.
Attaching the Front Panel
Push the end of the right-side arm outward to release
the tab.
Move the left-side arm outward to release the left tab,
and then pull the panel towards you.
Insert the shaft of the left arm along the step on the
unit into the hole.
Securely insert the shaft of the right arm along the
step on the unit into the hole.
Mak
e
sur
e
tha
t
th
e
fron
t
pane
l
is
securel
y
attached
,
an
d
the
n close the front panel.
1.
Push the end of the right-side arm outward to release
Push the end of the right-side arm outward to release
2.
Move the left-side arm outward to release the left tab,
Move the left-side arm outward to release the left tab,
1.
Insert the shaft of the left arm along the step on the
Insert the shaft of the left arm along the step on the
2.
Securely insert the shaft of the right arm along the
Securely insert the shaft of the right arm along the
3.
1
2
Push
Arm
Arm
-7-
16

INFOR ATION
CAPABILITIES
Heat
i
n
g
Capab
i
l
i
ty
s
This room air conditioner utilizes a heat pump system that absorbs
exterior heat and brings it into a room to be heated. As the ambient
temperature gets lower, heating capability will also lower. In such a
situation, the inverter work to increase compressor rpm to keep the
unit!s heating capability from decreasing. If the unit!s heating perfor-
mance is still unsatisfactory, other heating appliances should be used
to augment this unit!s performance.
s
The air conditioner is designed to heat an entire room so that it may take some time before you feel warm.
Timer operation is recommended for effective preheating ahead of the desired time.
Cool
i
n
g
and Dehum
i
d
i
fy
i
n
g
Capab
i
l
i
t
i
e
s
s
If the heat present in a room exceeds the unit!s cooling capacity (for example, if there are many people in
the room or other heating appliances are used), the preset room temperature may not be reached.
CAUTION
PROHIBITION
Do not use a stove
or any other high
temperature
devices in proximity
to the indoor unit.
For the refrigerant charge information, please refer to the outdoor unit installation manual
or specification label.
REFRIGERANT INFORMATION
-8-
REGULAR INSPECTION
PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT
YOUR SALES AGENT SHOULD YOU NEED ANY HELP.
1
2
WARNING
WARNING
Check to see if the unit’s earth line has been con-
nected correctly.
If the earth line is disconnected or faulty, unit failure or
electric shock hazard may result.
Check to see if the mounting frame has rusted ex-
cessively or if the outdoor unit has tilted or become
unstable.
It could collapse or fall, causing injury.
AFTER SALES SERVICE AND WARRANTY
WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.
CONDITION
CHECK THE FOLLOWING POINTS
s
Do the batteries need replacement?
s
Is the polarity of the inserted batteries correct?
s
Is the fuse all right?
s
Is the voltage extremely high or low?
s
Is the circuit breaker !ON"?
s
Is the power plug inserted?
s
Do you have any power cut?
s
Is the air filter blocked with dust?
s
Is the set temperature suitable?
s
Have horizontal air deflectors been adjusted to their correct
positions according to the operation mode selected?
s
Are the air inlets or air outlets of indoor and outdoor units
blocked?
s
Is the fan speed !LOW"or !SILENT"?
When it does not operate.
When it does not cool well.
When it does not heat well.
If the remote controller is not
transmitting a signal.
(Remote controller display is
dim or blank.)
The following phenomena do not indicate unit failure.
<Operation start>
The unit is preparing to blow warm air. Please wait.
<In operation>
The outdoor unit is defrosting. Please wait.
Refrigerant flow noise in the pipe or valve sound generated when flow rate is
adjusted.
Noise generated when the unit expands or contracts due to temperature changes.
Noise generated with the indoor unit fan#s rpm changing such as operation start
times.
Noise of the motorized valve when the unit is switched on.
During heating, the operation
indicator blinks and air blow stops
Hissing or fizzy sounds
Squeaking noise
Rustling noise
Clicking noise
-9-
FROST WASH OPERATION
(FROST WASH)
indicator blinks
Noise occurred
during frost wash
operation
Frost wash operation
does not start
It does not wash when outside temperature is less than about 1 degrees Celsius or It does not wash when the humidity in the room is about 30% or less or about 70% or more than 43 degrees Celsius.
more.
When "FROST WASH" is done by operating a remote controller, it does not wash
Within 60 minutes after the end of "FROST WASH", "FROST WASH" is not operated for product protection.
It is the sound that the internal machine is inflated and contracted by the temperature change and the fin of the heat exchanger is frozen and thawed
Repeat for 1 secondǂon and 1 second off for 10 seconds Because "FROST WASH" can not work when operating the "FROST WASH" with
The air conditioner is operating Outside air temperature, room temperature and room humidity are not
It has not been over 60 minutes since the end of "FROST WASH"
remote controller.
suitable for "FROST WASH"
Repeat for 4 seconds on and 1 second off for 15 seconds Because it is not "FROST WASH" for a long time.
Operate the remote controller to operate "FROST WASH".
·
·
·
when the room temperature is less than about 10 degrees Celsius or more than about
32 degrees Celsius.
17

s
Contact your sales agent immediately if the
following phenomena should occur
s
The circuit breaker switches off or the fuse blows
frequently.
s
The switch operation is not stable.
s
Foreign matter or water accidentally enters the unit interior.
s
The power cord gets excessively hot or its insulation is torn or stripped.
s
TIMER lamp on the indoor unit display blinks.
As the nature of the failure can be identified by the blinking cycle,
check the blinking cycle before turning off the circuit breaker.
(
)
Notes
s
In quiet operation or stopping the running, the following phenomena may
occasionally occur, but they are not abnormal for the operation.
(1) Slight flowing noise of refrigerant in the refrigerating cycle.
(2) Slight rubbing noise from the fan casing which is cooled and then
gradually warmed as operation stops.
s
The odor will possibly be emitted from the room air conditioner because
the various odor, emitted by smoke, foodstuffs, cosmetics and so on,
sticks to it. So please clean the air filter and the evaporator regularly to
reduce the odor.
Noise of the ventilation fan sucking in air present in the drain hose and blowing out
dehumidifying water that had accumulated in the condensed water collector. For
details, consult your sales agent.
Operation noise changes due to power variations according to room temperature
changes.
Mist is generated as the air within the room is suddenly cooled by conditioned air.
Water generated during defrosting operation evaporates and steam is emitted.
Caused as the smells and particles of smoke, food, cosmetics, etc. present in room
air become attached the unit and blown off into the room again.
Defrosting is underway (as the heating operation is stopped, the microcomputer
checks frost accumulated in the outdoor unit and instructs the unit to perform
automatic defrosting if necessary).
Shows preheating or defrosting operation is underway.
As the protective circuit or preheat sensor operates when unit operation is stopped
during preheating and then restarted, or when operation mode is switched from cooling
to heating, the lamp continues to blink.
Actual room temperature may deviate slightly from the remote controller's
temperature setting depending on the number of people in the room, indoor or
outdoor conditions.
s
Please contact your sales agent immediately if the air conditioner still fails to operate normally after
the above inspections. Inform your agent of the model of your unit, production number, date of
installation. Please also inform him regarding the fault.
Please note:
On switching on the equipment, particularly when the room light is dimmed, a slight brightness
fluctuation may occur. This is of no consequence.
The conditions of the local Power Supply Companies are to be observed.
Does not reach the temperature
setting
Mist emission
Perking noise
Changing operation noise
Steam emitted from the outdoor unit
The outdoor unit continues to operate
even if operation is stopped.
Odors
The OPERATION lamp is blinking.
f the unit still fails to operate
normally after performing the
above inspections, turn the
circuit breaker off and contact
your sales agent immediately.
-10-
18

CONSTRUCTION AND DIMENSIONAL DIAGRAM
MODEL RAK-15QEF,RAK-18REF,RAK-25RE
RAK-25REFC,RAK-35REFC,RAK-50REFC
F,RAK-35REF,RAK-50REF
More than
50mm
More than
More
than
50mm
50mm
More
than
Service space
2300mm
INDOOR UNIT
(RAK-18/25/35REF、RAK-25/35REFC)
( 12.7) (RAK-50REF、RAK-50REFC)
440mm
534mm
780mm
65mm
450mm
445mm
220mm
123mm
85mm
60mm 80mm
22mm 32.5mm
123mm
280mm
42.5mm
184mm 59mm
45mm
115mm
15mm
215 780
304
347 70 73
47 47
5 60
280
5 06
203273
284 284
19

MAIN PARTS COMPONENT
FAN MOTOR
THERMOSTAT (Room temperature Thermistor)
M
RAK-15QEF,RAK-18/25/35/50REF,RAK-18/25/35/50REFC
RAK-15QEF,RAK-18/25/35/50REF,RAK-18/25/35/50REFC
DC:340V
340V
0V
15V
0~65V
RED
BLK
BLU
WHT
YEL
38W
20