Hitachi RAS-25JX4 User manual

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Ð 123 Ð
PARTS NO. Q'TY PARTS NAME
OUTDOOR UNIT
NO RAC-25JX4 RAC-35JX4
BUSH ASSEMBLY
BUSH
DRAIN PIPE
COVER (CAPACITOR
CORD ASSEMBLY
REVERSING VALVE ASSEMBLY
ELECTRIC EXPANSION VALVE ASSEMBLY
HWRAC-25YH4
HWRAC-25YH4
HWRAC-25YH4
HWRAC-25YH4
HWRAC-E08H
HWRAC-D10EX
HWRAC-D10EX
48
49
50
51
52
53
54
1
1
1
1
1
1
1
948
949
950
951
914
919
920
1. In order to disassemble and repair the
unit in question, be sure to disconnect the
power cord plug from the power outlet
before starting the work.
2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit,
and the replacement must be effected in correct manner according to the instructions in the Service
Manual of the unit.
3. After completion of repairs, the initial state should be
restored.
4. Lead wires should be connected and laid as in the
initial state.
5. Modification of the unit by the user himself should
absolutely be prohibited.
6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in
advance.
7. In installing the unit having been repaired, be careful to prevent the occurrence of any accident such as
electrical shock, leak of current, or bodily injury due to the drop of any part.
8. To check the insulation of the unit, measure the insulation resistance between the power cord plug and
grounding terminal of the unit.
The insulation resistance should be 1M 9 or more as measured by a 500V DC megger.
9. The initial location of installation such as window, floor or the other should be checked for being safe
enough to support the repaired unit again.
If it is found not so strong and safe, the unit should be installed at the initial location after reinforced or
at a new location.
10. Any inflammable object must not be placed
about the location of installation.
11. Check the grounding to see whether it is
proper or not, and if it is found improper,
connect the grounding terminal to the earth.
Spray
gasoline
gasbombe
thinner
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If the contacts of electrical
parts are defective, replace
the electrical parts without
trying to repair them
1
2
3
4
5
DANGER

Ð1Ð
      
 
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.)
  
(1) Micro computer
(2) Integrated circuits (I.C.)
( ) 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.
! "    #$ %& '&$(%&)
(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled in
the same way.)
(2) When any part is handled uncovered (in counting, packing and the like), the handling person must
always use himself as a body earth. (Make yourself a body earth by passing one M ohm earth
resistance through a ring or bracelet.)
( ) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is
being taken.
(4) Be sure to place a part on a metal plate with grounding.
(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time,
try to repair the printed circuit board on a grounded metal plate.
HITACHII
C401TH1 ,188UV
%)  &$*%# &%&
A conductive polyvinyl bag
IC
IC
Conductive sponge
%)  $+ '
Body earth (Elimik conductive band)
Clip for connection with
a grounding wire
1M 9

Ð2Ð
(6) Use a three wire type soldering iron including a grounding wire.
    
Use a high insulation mode (100V, 10M 9 or higher) when ordinary iron is to be used.
( ) In checking circuits for maintenance, inspection, or some others, be careful not to have the test probes
of the measuring instrument shortcircuit a load circuit or the like.
Bare copper wire (for body earth) Metal plate (of Al. stainless steel, etc.)
Working table
Resistor 1M 9 (1/2W)
Earth wirte
Staple
     
soldering iron
Grounding wire
Screw stop at the screwed
part using a rag plate

Ð3Ð
1. In quiet operation or stopping the running, 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 to disconnect the power cord plug from
the power outlet for safety.
3. The room air conditioner does not start automatically after recovery of the electric power failure for prevent
ing fuse blowing. Re press START/STOP button after 3 minutes from when unit stopped.
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 (50¡F).
6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below
Ð15¡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

Ð4Ð
SPECIFICATIONS
MODEL
FAN MOTOR
FAN MOTOR CAPACITOR
FAN MOTOR PROTECTOR
COMPRESSOR
COMPRESSOR MOTOR CAPACITOR
OVERLOAD PROTECTOR
OVERHEAT PROTECTOR
FUSE (for MICROPROCESSOR)
POWER RELAY
POWER SWITCH
TEMPORARY SWITCH
SERVICE SWITCH
TRANSFORMER
VARISTOR
NOISE SUPPRESSOR
THERMOSTAT
REMOTE CONTROL SWITCH (LIQUID CRYSTAL)
40W (DC350V)
NO
NO
NO
ATC09 SD-A8JT
YES
YES
3.0A
G4A
NO
NO
YES
NO
450NR
YES
YES(IC)
NO
WITHOUT REFRIGERANT BECAUSE
COUPLING IS FLARE TYPE.
UNIT
PIPES (MAX. 0m)
REFRIGERANT CHARGING
VOLUME
(Refrigerant 410A)
870g
RAS- 5JX4
RAS-35JX4 RAC- 5JX4 RAC-35JX4
5W (DC35V)
NO
NO
Ñ
NO
NO
NO
NO
NO
YES
NO
NO
NO
NO
YES(IC)
YES
----------
YES

Ð5Ð
Ð3Ð
¥Donot 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.
¥Besure to use the specified piping set for R410A. Otherwise, this may result in broken
copper pipes or faults.
¥Acircuitbreaker shouldbeinstalled dependingon themountingsite oftheunit. Without
a circuit breaker, the danger of electric shock exists.
¥Donot install the unit near location where there is flammable gas.
The outdoor unit may catch fire if flammable gas leaks around it. Piping shall be
suitable supported with a maximum spacing of 1m between the supports.
¥ Please ensure smooth flow of water when installing the drain hose. If any failure is
found in the drain path, water drops from the indoor and outdoor units, causing wet household effects.
¥ Make sure that a single phase 230V power source is used.
Theuse ofother powersourcesmay causeelectrical componentsto overheatandlead to fire.

¥Please read the ÒSafety PrecautionÓ carefully before operating the unit to ensure correct usage of the unit. ¥Pay special attention to signs of Ò

Óand Ò

Ó.The ÒWarningÓ section contains matters which, if
not observed strictly, may cause death or serious injury. The ÒCautionÓ 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.) ¥Please keep this manual after reading.
 
  
PROHIBITION
PROHIBITION
¥Should abnormal situation arise (like burning smell), please stop operating the unit
and remove plug from the socket or turn off the circuit breaker. Contact your agent. Fault, short circuit or fire may occur if you continue to operate the unit under abnormal
situation.
¥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.
¥Avoid an extended period of direct air flow for your health. ¥Donotconnect thepower calbe with an extension cable ordo not plug too many leads
of the other electric appliance into the socket where this cable is plugged. In addition, wire the cable with some allowances to prevent the cable from stretching. Not doing
so will cause an electrical shock, heat generation or fire.
¥Donot bundle the power cable, pull it, put something on it, heat it, process it, or put
it between things. Breakage of the power cable may result. Use of a damaged cable may cause an electrical shock or a fire.
¥Donot put objects like thin rods into the panel of blower and suction side because the
high speed fan inside may cause danger.
    
"OFF"
PROHIBITION
CONNECT EARTH LINE
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
This sign in the figure indicates prohibition. Indicates the instructions that must be followed.
 
  
Ð4Ð
¥Donot use any conductor as fuse wire, this could cause fatal accident.
¥ During thunder storm, please stop operating the unit and turn off the circuit breaker.
¥ Spraycans and other combustibles shouldnotbelocatedwithinameterof the air outlets
of both indoor and outdoor units. As a spray canÕs internal pressure can be increased by hot air, a rupture may result.
¥ The product shall be operated under the manufacturer specification and not for any
other intended use.
¥Donot attempt to operate the unit with wet hands. this could cause fatal accident.
¥ When operating the unit with burning equipments, regularly ventilate the room
to avoid oxygen insufficiency.
¥Donot 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.
¥ Please ensure that outdoor mounting frame is always stable, firm and without defect.If
not, the outdoor unit may collapse and cause danger.
¥Donot 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.
¥Donot place plants or animals directly under the air flow as it is bad for the plants or
animals.
¥Donot climb on the outdoor unit or put objects on it.
¥ When operating the unit with the door and windows opened, (the room humidity is
always above 80%) and with the air deflector facing down or moving automatically for along period of time, water will condense on the air deflector and drips down occasionally.This will wet your furniture.Therefore, do not operate under such condition
foralong time.
¥Ifthe 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.
¥Donot touch the air outlet, bottom surface and aluminum fin of the outdoor
unit.
You m ay get hurt.
¥Donot touch the refrigerant pipe and connecting valve.
Burns may result.


  
"OFF"
DON'T WET
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
DONÕT TOUCH
PROHIBITION
PROHIBITION
PROHIBITION
STRICTLY OBSERVE
PRECAUTIONS
PROHIBITION
PROHIBITION
PROHIBITION PROHIBITION
DONÕT TOUCH

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  This traps dirt and dust particles in the air while the exhaust is operating. (Refer to page 25)
         This deodorizes and eliminates dust from the air ventilated from the outside. (Refer to pages 11 25)
    This traps dirt and dust particles in the air ventilated from the outside. (Refer to pages 11 25)
 
   ! ! Select one of the following: ÒProhibit Two Way Air ExchangeÓ ÒOnly ExhaustÓ and ÒOperate Two Way Air ExchangeÓ. Please refer to page 33 regarding installation when the Two Way Air Exchange cannot be operated. (When the device is shipped out of the factory it is set to ÒOperate Two Way Air ExchangeÓ.)
"#  #   #$
(How to open the front panel refer to page 10.)
# ! If the remote controller does not work due to battery failure press this switch to start and stop operation. ¥This temporary operation will be at the
most recent setting mode. (The unit will immediately go into automatic operation once power is switched on.)
 !
%"
Turn off the circuit breaker or pull out the power plug if the unit is not be operated for a long period.
" & ' ()* % +'
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).
""' % "'"+ +
 ! The Dirt Sensor detects cigarette smoke sprays (pesticides) alcohol etc. (Refer to pages 19 34)
,!  %"! " ) '

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Press the (TIME) button. The time indication starts lighting instead of blinking.
¥The time indication ill disappearautomatically in 10 seconds. ¥Tocheck the current time setting, press the (TIME) button
t ice.The setting of the current time is no complete.
¥The timer may be used in three ays: off-timer, on-timer and ON/OFF (OFF/ON)-timer. Set the current time at first
because it serves as a reference.
¥Asthe time settings are stored in memory in the remote controller, you only have to press the (RESERVE) button in
order to use the same settings next time.
Set the turn-off time
ith the TIMER control button.
!
Point the signal indo of the remote controller to ard the indoor unit, and press
the (RESERVE) button.
The (OFF) mark starts lighting instead of blinking and the (RESERVED) sign
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
Example: The device ill turn off at 11:00 p.m. The setting of turn-off time is no complete.
!
Point the signal indo of the remote controller to ard the indoor unit, and press
the (RESERVE) button.
The (ON) mark starts lighting instead of blinking and the (RESERVED) sign lights.
Abeep occurs and the (TIMER) lamp lights on the indoor unit.
Example: The device ill turn on early so that the preset temperature be almost reached at 7:00 a.m. The setting of the turn-on time is no complete.
Set the turn-on time
ith the TIMER control button.
"
Set the turn-on time
ith the TIMER control button.
Example: For heating, the device ill turn off at 10:30 p.m., and then turn on early so that the preset temperature be almost reached at 7:00 a.m.; for cooling and dehumidifying, it ill simply turned on at 7:00 a.m. The settings of the turn on/off times are no complete.
#
Point the signal indo of the remote controller to ard the indoor unit, and press
the (RESERVE) button.
The (ON) mark starts lighting instead of blinking and the (RESERVED) sign lights.
Abeep occurs and the (TIMER) lamp lights on the indoor unit.

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