Hitachi RAF25NH4 User manual

  



 



 









 

 

 

    

    

  

         

          

   !

  



 



‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥



 



‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥





  

‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥







‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥





   

‥‥‥‥‥‥‥



  

  

 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥



 

 

‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥

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 

      

‥‥‥‥‥‥



    

 

 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥111

  

 

 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥115

  

   

 ‥‥‥‥‥‥‥‥‥‥‥‥164

     

    

‥‥‥‥‥‥‥

!

    

"  #

 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥236

   

  

‥‥‥‥‥‥‥‥‥‥‥‥‥244

DEMONTAGEETREMONTAGE

 

 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥256

  

   

‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥302

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   

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

3. 3/

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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. fter 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

Ω

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. ny 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

   

If the contacts of electrical

parts are defective, replace

the electrical parts without

trying to repair them

DANGER

       

   

                 

       

!      

   "

#       

  $"   

"   

% &              

&      '     

(           )     

"      

*      ) "        +   

     ",

- .              "

  /        0

Ω

      

  %112 //

3                 4 

     '  "        

     

1     

    "

       

56      " 

      

7  "  , 

7 



8

9

:"  

       

4      

    

      

   

DANGER





;;

Ð2Ð

      

 

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

Conductive sponge

%)  $+ '

Body earth (Elimik conductive band)

Clip for connection with

a grounding wire

Ω

Ð3Ð

    

  

Pour viter d'endommager les semi-conducteurs utiliss dans les units, lors de chaque intervention

d'entretien ou de rparation, vous devez observer des prcautions spciales. Les mmes prcautions

doivent tre prises lors de la manipulation d'organes dfectueu qui doivent tre retourns en usine.

 !"# $$"# " %"&"

(1) Micro-ordinateur

(2) Circuits intgrs (C.I.)

(3) Transistor  effet de champ (T.E.C)

(4) Circuits imprims sur lesquels se trouvent implants les composants (1) et (2).

' %$(# " (

(1) Pour transporter ou stocker un semi-conducteur, placez-le dans un emballage conducteur. Procder de

mme avec un composant dfectueu .

(2) Lorsque vous maniqulez des composants qui ne sont pas protgs (par e emple pour les compter ou

les emballer), vous devez veiller  ce que votre corps soit lectriquement reli  la terre. Pour cela,

portez un bracelet conducteur. Reliez le bracelet  une rsistance de 1M

Ω

et celle-ci  la terre par

l'intermdiaire d'un conducteur.

(3) Veillez en outre  ce que vos vtements ne viennent jamais en contact avec le composant mme si

votre corps est reli  la terre.

(4) Dposez le composant sur une surface mtallique correctement mise  la terre.

(5) Sous aucun prte te, n'omettez de couper l'alimentation avant de procder  une rparation sur un

circuit imprim. Par ailleurs, l'intervention sur le circuit imprim doit se faire alors que celui-ci repose

sur une surface mtallique mise  la masse.

HITACHII

C401TH1 ,188UV

)&  *&" ("(%

Sac en polyvinyle

conducteur

C.I.

Eponge

conductrice

)& #" +  "%%" ( %#

Bracelet de mise  la terre du corps

(Bande conductrice Elimik)

Pince de conne ion avec

fil de mise  la terre

Ω

Ð4Ð

(6) Use a three wire type soldering iron including a grounding wire.

    

Use a high insulation mode (100V, 10M

Ω

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

Ω

(1/2W)

Earth wirte

Staple

     

soldering iron

Grounding wire

Screw stop at the screwed

part using a rag plate

Ð5Ð

(6) Le fer  souder doit tre aliment par un cble  trois conducteurs (dont un pour la mise  la terre).

        

Vous pouvez galement utiliser un fer  souder ordinaire dans la mesure o il est parfaitement

isol (au moins 10M

Ω

sous 100V).

(7) Pendant le contrle des circuits au cours des oprations d'entretien ou d'inspection, vitez  tout prix la

mise en court-circuit de la charge par les pointes de contact de l'appareil de mesure.

Fil de cuivre nu

(pour mise  la

terre du corps)

Surface mtallique (aluminium, acier inoxydable, etc.)

Plan de travail

Rsistance de

Ω

(1/2W)

Cble de masse

Agrafe

        

fer  souder

Cble de masse

Poser ici une rondelle ventail et la visser

Ð6Ð

1. In quiet operation or stopping the running, its heard slight flowing noise of

refrigerant in the refrigerating cycle 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 dose not start automaticaly after reco ery of the electric

power failure for pre enting 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 e en if operation is restarted accidentally.

5. This room air conditioner should not be used at the cooling operation when the

outside temperature is below 10ûC (50ûF).

6. This room air conditioner (the re erse cycle) should not be used when the outside

temperature is below Ð15ûC (5ûF).

If the re erse cycle is used under this condition, the outside heat exchanger is

frosted and efficiency falls.

7. When the outside heat exchanger is frosted, the front is melted by operating the

hot gas system, it is not trouble that at this time fan stops and the apour may

rise from the outside heat exchanger.

CAUTION

Ð7Ð

1. Dans certaines conditions et pendant un arrt de fonctionnement, on peut parfois

entendre le bruit du rfrigrant circulant dans les canalisations; ce bruit n'a rien

d'anormal.

2. Pour des raisons de scurit, il est conseill, pendant un orage, d'arrter le

fonctionnement du systme en coupant l'alimentation lectri ue.

3. Pour viter ue le fusible ne fonde, le climatiseur ne dmarre pas automati uement

aprs une panne de secteur. La remise en marche suppose une pression sur la

touche START / STOP aprs un dlai d'au moins 3 minutes suivant l'arrt.

4. Si le climatiseur est arrt  la suite d'un rglage de thermostat, ou  cause d'une

fausse manoeuvre et u'il est remis en route, il se peut ue la rfrigration ou le

chauffage ne reprenne u'aprs 3 minutes. Ce phnomne est normal et d  un

relais temporis. Ce relais temporis a pour rle d'viter ue le fusible ne fonde

ou ue des composants ne soient endommags par une remise en service

accidentelle.

5. Ce climatiseur ne doit pas tre utilis pour rfrigrer une pice lors ue la

temprature extrieure est infrieure  10ûC (50ûF).

6. Ce climatiseur ne doit pas tre utilis lors ue la temprature extrieure est

infrieure  -15ûC (5ûF).

En effet, dans ce cas, l'changeur de chaleur extrieur gle et le rendement chute

considrablement.

7. Quand l'changeur de chaleur extrieur est givr, les gaz chauds peuvent entraner

une vaporisation de l'eau accumule sur la face avant. Ce n'est pas un problme

si  ce moment-l le ventilateur s'arrte et il se peut ue de la vapeur se dgage

de l'changeur de chaleur extrieur.

ATTENTION



SPECIFICATIONS

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