Hitachi RAF25NH4 User manual

SM0757

RAM70QH4

(MULTIZONE 70H)

RAM80QH4

(MULTIZONE 80H)

RAF25NH4

RAF50NH4

RAD25QH4

RAD40QH4

SERVICE MANUAL

TECHNICAL INFORMATION

INFORMATIONS TECHNIQUES

REFER TO THE FOUNDATION MANUAL

REPORTEZ-VOUS AU MANUEL DE BASE

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LES SPECIFICATIONS ET PIECES DETACHEES PEUVENT CHANGER POUR ETRE AMELIOREES.

FOR SERVICE PERSONNEL ONLY

RESERVE AU PERSONNEL

SPECIFICATIONS

CARACTERISTIQUES GENERALES

SPECIFICATIONS 8

CARACTERISTIQUES GENERALES

FEATURES 28

CARACTÉRISTIQUES

HOW TO USE 44

UTILISATION

INSTALLATION 72

INSTALLATION

CONSTRUCTION AND DIMENSIONAL DIAGRAM 76

DIMENSIONS DES UNITÉS

MAIN PARTS COMPONENT 84

PRINCIPAUX COMPOSANTS

WIRING DIAGRAM 86

SCHÉMAS ÉLECTRIQUES

WIRING DIAGRAM OF THE PRINTED WIRING BOARD

SCHÉMA ÉLECTRIQUE DU CIRCUIT IMPRIMÉ

BLOCK DIAGRAM 111

ORGANIGRAMME DE CONTROLE

BASIC MODE 115

MODE DE BASE

REFRIGERATING CYCLE DIAGRAM 164

SCHÉMA DU CYCLE DE RÉFRIGÉRATION

DESCRIPTION OF MAIN CIRCUIT OPERATION

183

DESCRIPTION DES PRINCIPAUX CIRCUITS ÉLECTRIQUES

SERVICE CALL Q&A 236

MODE OPERATOIRE DE DEPANNAGE

DISASSEMBLY AND REASSEMBLY 244

DEMONTAGE ET REMONTAGE

TROUBLE SHOOTING 256

DETECTION DES PANNES

PARTS LIST AND DIAGRAM 302

LISTE DES PIÉCES DE RECHANGE ET DIAGRAMME

CONTENTS

TABLE DES MATIERES

TYPE TYPE

MODEL MODÈLE

POWER SOURCE PHASE/TENSION/FREQUENCE

TOTAL INPUT

PUISSANCE ABSORBEE TOTALE

(W)

TOTAL AMPERES

AMPERES TOTAUX (A)

CAPACITY

CAPACITE (kW)

(B.T.U./h)

TOTAL INPUT

PUISSANCE ABSORBEE TOTALE

(W)

TOTAL AMPERES

AMPERES TOTAUX (A)

CAPACITY

CAPACITE (kW)

(B.T.U./h)

W, L

DIMENSIONS DIMENSIONS (mm) H, H

D, P

NET WEIGHT POIDS NET (kg)

DC INVERTER TRIPLE AND QUADRUPLE SYSTEM MULTI

SYSTEME DE TRIPLE ET QUADRUPLE ONDULEUR CC MULTI

INDOOR UNIT UNITÉ INTÉRIEURE

OUTDOOR UNIT UNITÉ EXTÉRIEURE

750

600

215

15.0

750

235

400

14.0 77 79

1ø, 230V, 50Hz

RAF25NH4 RAF50NH4

REFER TO THE SPECIFICATIONS PAGE 10.

REPORTEZ-VOUS AUX SPECIFICATIONS DE LA PAGE 11.

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

APRIL 2003 Hitachi Home & Life Solutions, Inc.

RAD25QH4

RAD40QH4

RAF25NH4

RAF50NH4

RAM70QH4

RAM80QH4

COOLING

RÉFRIGÉRATION

HEATING

CHAUFFAGE

RAD25QH4 RAD40QH4

RAM70QH4 RAM80QH4

*After installation Après installation

850 (+90)*

830

340 (+50)*

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

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If the contacts of electrical

parts are defective, replace

the electrical parts without

trying to repair them

DANGER

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 

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.)

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(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.

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(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 ,188 UV

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A conductive polyvinyl bag

Conductive sponge

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Body earth (Elimik conductive band)

Clip for connection with

a grounding wire

Ω

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(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

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soldering iron

Grounding wire

Screw stop at the screwed

part using a rag plate

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



SPECIFICATIONS

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SPECIFICATION OF ROOM AIR CONDITIONER

RAF-25NH4 RAF-50NH4 RAD-25QH4 RAD-40QH4 RAM-70QH4 RAM-80QH4

STANDARD

CE(EMC&LVD)

INDOOR UNIT RAF-25NH4 RAF-50NH4 RAD-25QH4 RAD-40QH4

OUTDOOR UNIT 1.0HP 2.0HP 1.0HP 1.5HP

CAPACIT (kW) 2.5(1.0

〜

2.8) 5.0(1.0

〜

5.6) 2.5(1.0

〜

2.8) 4.0(1.0

〜

4.5)

COOLING (BTU/h) 8525(3410

〜

9550)

17050(3410

〜

19100)

8525(3410

〜

9550) 13640(3410

〜

15345)

TOTA LINPUT(W) 780(360

〜

980) 1910(360

〜

2100) 780(360

〜

980) 1340(360

〜

1480)

(ONE UNIT) COP 3.21 2.62 3.21 2.99

TOTA LAMPERES(A) 3.4 8.4 3.4 5.9

POWER FACTOR(%) 99 99 99 99

SOUND LEVEL(INDOOR)

35 44 40 43

AIR FLOW VOLUME(Hi)

7.4 m

/min 10.3 m

/min 8.7 m

/min 9.0 m

/min

COOLING CAPACIT (kW)

(3 & 4 UNITS)

(BTU/h)

RAF-25NH4

TOTA LINPUT(W)

…

RAM-70QH4

COP

TOTA LAMPERES(A)

RAF-25NH4

POWER FACTOR(%)

…

RAM-80QH4

SOUND LEVEL(OUTDOOR)

CAPACIT (kW) 3.9(1.1

〜

4.7) 6.7(1.1

〜

7.6) 3.9(1.1

〜

4.7) 6.0(1.1

〜

6.8)

HEATING (BTU/h) 13300(3750

〜

14660)

22847(3750

〜

25920)

13300(3750

〜

14660)

20460(3750

〜

23190)

TOTA LINPUT(W) 1100(320

〜

1280) 2070(320

〜

2170) 1100(320

〜

1280) 1770(320

〜

1920)

(ONE UNIT) COP 3.55 3.24 3.55 3.39

TOTA LAMPERES(A) 4.8 9.1 4.8 7.8

POWER FACTOR(%) 99 99 99 99

SOUND LEVEL(INDOOR)

35 44 41 43

AIR FLOW VOLUME(Hi)

8.5 m

/min 12.3 m

/min 9.0 m

/min 9.5 m

/min

HEATING CAPACIT (kW)

(3 & 4 UNITS)

(BTU/h)

RAF-25NH4

TOTA LINPUT(W)

…

RAM-70QH4

COP

TOTA LAMPERES(A)

RAF-25NH4

POWER FACTOR(%)

…

RAM-80QH4

SOUND LEVEL(OUTDOOR)

ES ES ES ES

3333

ES(WIRELESS) ES(WIRELESS) ES(WIRELESS) ES(WIRE LESS)

RAF-25NH4,50NH4 RAD-25QH4,40QH4 RAM-70QH4 RAM-80QH4

W 29-17/32(750) 29-17/32(750)

DIMENSIONS H 35-5/8(600) 9-1/4(235)

inches(mm) D 8-15/32(215) 15-3/4(400)

(INSTALLED) - -

15 14 77 79

W 31-3/8(797) 31-23/32(806)

PACKING H 25-13/16(656) 12-1/16(306)

inches(mm) D 10-15/16(278) 23-3/8(594)

cu.ft 5.13 5.17

17 16 81 83

6.35/9.52 6.35/12.7

6.35/9.52

33-1/2(850)

32-11/16(830)

15-17(390)

CONSOLE FREE DUCT

10.9

99 99

COOLING/HEATING

NOT PROVIDED(POWER CORD SHOULD BE PREPARED AND

FLARE NUT SIZE(SMALL/LARGE)

NET WEIGHT (kg)

T PE

MODEL

CLASS

REMOTE CONTROL SWITCH

MAXIMUM LENGTH OF PIPING

PHESE/VOLTAG E/FREQUENC

AUTOMATIC AIR DEFLECTORS

FAN SPEED

230V 50Hz

RAM-70QH4 RAM-80QH4

7.0(3.0

〜

7.9)

23870(10230

〜

26260)

2180(650

〜

3180)

8.0(3.0

〜

9.2)

27280(10230

〜

30690)

GROSS WEIGHT(kg)

LINE CORD

MAX60m(THREE UNITS TOTAL) MAX70m(FOUR UNITS TOTAL)

MODEL

13.31

CONNECTED TO OUTDOOR UNIT WHEN INSTALLED)

39-1/4(997)

34-21/32(880)

6.35/9.52

3.21

9.6

99 99

16-15/16(430)

51 51

11.0(3.0

〜

12.4)

37530(10230

〜

42310)

2480(620

〜3520)

9.6(3.0 〜 10.6)

32760(10230 〜 36170)

2630(620 〜 3630)

3.87 4.18

3.02

11.6

2650(650 〜 3200)

11.6

Ð12Ð

COOL / HEAT CAPACITY SPEC. FOR INDOOR UNITS

COMBINATIONS

TO BE ABLE TO OPERATE SIMULTANEOUSLY

TRIPLE SYSTEM MULTI R.A.C.

MULTIZONE 70H

Whichever in oor units are installe , cooling an heating capacity

epen s on how many an which in oor units are operating at that time.

MODEL:ＲＡＭ―７０ＱＨ４



CAPACITY POWER AMPERE(A) CAPACITY POWER AMPERE(A)

RATING（kW）



CONSUMPTION ２３０Ｖ

RATING（kW）



CONSUMPTION ２３０Ｖ



（RANGE）



（Ｗ）



（RANGE）



（Ｗ）



2.5 2.50 780 3.4 3.90 1100 4.8

(1.00〜2.80) (360〜980) (1.10〜4.70) (320〜1,280)

ONE 3.5 3.50 1160 5.1 4.80 1380 6.1

UNIT (1.00〜3.90) (360〜1,280) (1.10〜5.80) (320〜1,750)

4.0 4.00 1340 5.9 6.00 1770 7.8

(1.00〜4.50) (360〜1,480) (1.10〜6.80) (320〜1,920)

5.0 5.00 1910 8.4 6.70 2070 9.1

(1.00〜5.60) (360〜2,100) (1.10〜7.60) (320〜2,170)

2.5+2.5 2.50+2.50 1560 6.9 3.90+3.90 2290 10.1

◇



(1.50〜5.60) (640〜1,720) (1.50〜8.60) (600〜2,520)

TWO 2.5+3.5 2.50+3.50 1990 8.7 3.90+4.80 2690 11.8

UNITS (1.50〜6.60) (640〜2,190) (1.50〜9.60) (600〜2,960)

2.5+4.0 2.50+4.00 2220 9.7 3.50+5.50 3200 14.1

(1.50〜7.00) (640〜2,440) (1.50〜9.90) (600〜3,520)

2.5+5.0 2.50+4.50 2580 11.3 3.00+6.00 3200 14.1

(1.50〜7.60) (640〜2,840) (1.50〜9.90) (600〜3,520)

3.5+3.5 3.50+3.50 2580 11.3 4.70+4.70 3200 14.1

(1.50〜7.60) (640〜2,840) (1.50〜10.30) (600〜3,520)

3.5+4.0 3.30+3.70 2580 11.3 4.50+4.90 3200 14.1

(1.50〜7.60) (640〜2,840) (1.50〜10.30) (600〜3,520)

3.5+5.0 2.90+4.10 2580 11.3 3.90+5.50 3200 14.1

(1.50〜7.60) (640〜2,840) (1.50〜10.30) (600〜3,520)

4.0+4.0 3.50+3.50 2580 11.3 4.70+4.70 3200 14.1

(1.50〜7.60) (640〜2,840) (1.50〜10.30) (600〜3,520)

4.0+5.0 3.10+3.90 2580 11.3 4.20+5.20 3200 14.1

(1.50〜7.60) (640〜2,840) (1.50〜10.30) (600〜3,520)

2.5+2.5 2.50+2.50 1660 7.3 2.90+2.90 1580 6.9

◆



(1.50〜5.50) (640〜1830) (1.50〜6.40) (600〜1,740)

TWO 2.5+3.5 2.30+3.30 1860 8.2 2.60+3.60 1930 8.5

UNITS (1.50〜6.20) (640〜2,050) (1.50〜6.80) (600〜2,120)

2.5+4.0 2.20+3.40 1860 8.2 2.40+3.80 1930 8.5

(1.50〜6.20) (640〜2,050) (1.50〜6.80) (600〜2,120)

3.5+3.5 2.80+2.80 1860 8.2 3.10+3.10 1930 8.5

(1.50〜6.20) (640〜2,050) (1.50〜6.80) (600〜2,120)

ＣＯＯＬＩＮＧ



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

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

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

ＴＯＯＰＥＲＡＴＥ



Ð14Ð

RATING CONDITION (DRY BULB / WET BULB)

COOLING

HEATING

INDOOR

27/19

℃

20 /

−℃

OUTDOOR

35 /

−℃

6℃

CAPACITY POWER AMPERE(A) CAPACITY POWER AMPERE(A)

RATING（kW）



CONSUMPTION ２３０Ｖ

RATING（kW）



CONSUMPTION ２３０Ｖ



（RANGE）



（Ｗ）



（RANGE）



（Ｗ）



2.5+2.5+2.5 2.33+2.33+2.33 2180 9.6 3.20+3.20+3.20 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

THREE 2.5+2.5+3.5 2.05+2.05+2.90 2180 9.6 2.80+2.80+4.00 2480 10.9

UNITS (3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

2.5+2.5+4.0 1.95+1.95+3.10 2180 9.6 2.60+2.60+4.40 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

2.5+2.5+5.0 1.75+1.75+3.50 2180 9.6 2.35+2.35+4.90 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

2.5+3.5+3.5 1.80+2.60+2.60 2180 9.6 2.53+3.53+3.53 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

2.5+3.5+4.0 1.75+2.45+2.80 2180 9.6 2.40+3.40+3.80 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

2.5+3.5+5.0 1.60+2.20+3.20 2180 9.6 2.10+3.10+4.40 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

2.5+4.0+4.0 1.70+2.65+2.65 2180 9.6 2.20+3.70+3.70 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

3.5+3.5+3.5 2.33+2.33+2.33 2180 9.6 3.20+3.20+3.20 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

3.5+3.5+4.0 2.20+2.20+2.60 2180 9.6 3.10+3.10+3.40 2480 10.9

(3.00〜7.90) (650〜3,180) (3.00〜10.60) (620〜3,520)

◇ Twounits Eachunitisconnectedtoeachcompressor.

◆ Twounits Twounitareconnectedtoonecompressor.

ＣＯＯＬＩＮＧ



ＨＥＡＴＩＮＧ



ＰＯＳＳＩＢＬＥ



ＣＯＭＢＩＮＡＴＩＯＮＳ



ＴＯＯＰＥＲＡＴＥ



Ð16Ð

COOLING HEATING COOLING HEATING

1.00〜2.80 1.10〜4.70 11〜17 15〜18

1.00〜4.50 1.10〜6.80 18〜28 22〜27

1.00〜5.60 1.10〜7.60 23〜34 24〜30

NO.1 NO.2 NO.3

6.35/9.52D 6.35/9.52D 6.35/9.52D

2.5+2.5 2.5 --- 2.5

2.5+3.5 2.5 --- 3.5

TWO 2.5+4.0 2.5 --- 4.0

UNITS 2.5+5.0 2.5 --- ☆5.0

3.5+3.5 3.5 --- 3.5

3.5+4.0 3.5 --- 4.0

3.5+5.0 3.5 --- ☆5.0

4.0+4.0 --- 4.0 4.0

4.0+5.0 --- 4.0 ☆5.0

2.5+2.5 2.5 2.5 ---

2.5+3.5 2.5 3.5 ---

2.5+4.0 2.5 4.0 ---

3.5+3.5 3.5 3.5 ---

2.5,3.5,4.0,5.0meansindoorunitscoolingcapacityclass.

SUITABLEROOMSIZE(

m2

)

ATONEUNITOPERATION

(kW)

2.5

NOMINAL

COOLINGCAPACITY

CAPACITY(kW)

ATONEUNITOPERATION

INDOOR

UNIT

MODEL

RAD-25QH4

(ｍ



CONNECTINGPOSITIONON

OUTDOORUNIT

(VALVEDIAMETER)(mm)

RAF-25NH4

RAD-40QH4

RAF-50NH4

2.5

5.0

4.0

(11〜14)+(16〜20)

(11〜14)+(18〜22)

POSSIBLE SUITABLE

COMBINATIONS ROOMSIZE

TOINSTALL TOINSTALL

(12〜15)+(12〜15)

(12〜15)+(14〜18)

(14〜18)+(14〜18)

(13〜17)+(16〜20)

(13〜16)+(18〜22)

(16〜20)+(16〜20)

(16〜20)+(18〜22)

(12〜15)+(12〜15)

(12〜15)+(14〜18)

(11〜14)+(16〜20)

Twoorthreeindoorunitscanbeinstalledwithoneoutdoorunit,

whilehtreeisdesirable.

Andtotalnominalcooloingcapacityshouldnotbemorethan11.0kW.

   

  

    



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