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Hitachi RAF25NH4 Service Manual

Multizone 70/80h
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SERVICE MANUAL
TECHNICAL INFORMATION
INFORMATIONS TECHNIQUES
FOR SERVICE PERSONNEL ONLY
RESERVE AU PERSONNEL
RAF25NH4
RAF50NH4
û
CH
SPECIFICATIONS
CARACTERISTIQUES GENERALES
TYPE
TYPE
MODEL
MODÈLE
POWER SOURCE
PHASE/TENSION/FREQUENCE
TOTAL INPUT
PUISSANCE ABSORBEE TOTALE (W)
TOTAL AMPERES
AMPERES TOTAUX
COOLING
RÉFRIGÉRATION
CAPACITY
CAPACITE
TOTAL INPUT
PUISSANCE ABSORBEE TOTALE (W)
HEATING
TOTAL AMPERES
AMPERES TOTAUX
CHAUFFAGE
CAPACITY
CAPACITE
DIMENSIONS
DIMENSIONS
NET WEIGHT
POIDS NET
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LES SPECIFICATIONS ET PIECES DETACHEES PEUVENT CHANGER POUR ETRE AMELIOREES.
ROOM AIR CONDITIONER
APRIL 2003
RAD25QH4
RAD40QH4
RAM70QH4
RAM80QH4
DC INVERTER TRIPLE AND QUADRUPLE SYSTEM MULTI
SYSTEME DE TRIPLE ET QUADRUPLE ONDULEUR CC MULTI
INDOOR UNIT
RAF25NH4 RAF50NH4
(A)
(kW)
REFER TO THE SPECIFICATIONS PAGE 10.
(B.T.U./h)
REPORTEZ-VOUS AUX SPECIFICATIONS DE LA PAGE 11.
(A)
(kW)
(B.T.U./h)
W, L
750
(mm)
H, H
600
D, P
215
(kg)
15.0
INDOOR UNIT + OUTDOOR UNIT
Hitachi Home & Life Solutions, Inc.
SM0757
RAF25NH4
RAF50NH4
RAD25QH4
RAD40QH4
REFER TO THE FOUNDATION MANUAL
REPORTEZ-VOUS AU MANUEL DE BASE
TABLE DES MATIERES
SPECIFICATIONS
CARACTERISTIQUES GENERALES
FEATURES
CARACTÉRISTIQUES
HOW TO USE
UTILISATION
INSTALLATION
INSTALLATION
CONSTRUCTION AND DIMENSIONAL DIAGRAM
DIMENSIONS DES UNITÉS
MAIN PARTS COMPONENT
PRINCIPAUX COMPOSANTS
WIRING DIAGRAM
SCHÉMAS ÉLECTRIQUES
WIRING DIAGRAM OF THE PRINTED WIRING BOARD
SCHÉMA ÉLECTRIQUE DU CIRCUIT IMPRIMÉ
BLOCK DIAGRAM
ORGANIGRAMME DE CONTROLE
BASIC MODE
MODE DE BASE
REFRIGERATING CYCLE DIAGRAM
SCHÉMA DU CYCLE DE RÉFRIGÉRATION
DESCRIPTION OF MAIN CIRCUIT OPERATION
DESCRIPTION DES PRINCIPAUX CIRCUITS ÉLECTRIQUES
SERVICE CALL Q&A
MODE OPERATOIRE DE DEPANNAGE
DISASSEMBLY AND REASSEMBLY
DEMONTAGE ET REMONTAGE
TROUBLE SHOOTING
DETECTION DES PANNES
PARTS LIST AND DIAGRAM
LISTE DES PIÉCES DE RECHANGE ET DIAGRAMME
UNITÉ INTÉRIEURE OUTDOOR UNIT
RAD25QH4
RAD40QH4
RAM70QH4
ø
1
, 230V, 50Hz
750
235
400
14.0
*After installation
RAM70QH4
(MULTIZONE 70H)
RAM80QH4
(MULTIZONE 80H)
CONTENTS
111
115
164
183
236
244
256
302
UNITÉ EXTÉRIEURE
RAM80QH4
850 (+90)*
830
340 (+50)*
77
79
Après installation
8
28
44
72
76
84
86
93
loading

Related Manuals for Hitachi RAF25NH4

Summary of Contents for Hitachi RAF25NH4

  • Page 1 14.0 *After installation Après installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LES SPECIFICATIONS ET PIECES DETACHEES PEUVENT CHANGER POUR ETRE AMELIOREES. ROOM AIR CONDITIONER INDOOR UNIT + OUTDOOR UNIT APRIL 2003 Hitachi Home & Life Solutions, Inc.
  • Page 2 AFETY DURING REPAIR WORK . 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.
  • Page 3 ORKING 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.
  • Page 4 (6) Use a three wire type soldering iron including a grounding wire. Metal plate (of Al. stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1M (1/2W) Ω Staple Earth wirte ig.3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed...
  • Page 5 AUTION 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.
  • Page 6 PECIFICATION MODEL RAF-25NH4 RAF-50NH4 RAD-25QH4 RAD-40QH4 RAM-70QH4 RAM-80QH4 FAN MOTOR 20W (DC35V)                              FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR EU1013DD×2  OVER HEAT PROTECTOR OVERLOAD RELAY FUSE (for MICRO COMPUTER) 3.15A POWER RELAY, STICK RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR...
  • Page 7 SPECIFICATION OF ROOM AIR CONDITIONER û RAF-25NH4 RAF-50NH4 RAD-25QH4 RAD-40QH4 RAM-70QH4 RAM-80QH4 STANDARD CE(EMC&LVD) COOLING/HEATING TYPE CONSOLE FREE DUCT INDOOR UNIT RAF-25NH4 RAF-50NH4 RAD-25QH4 RAD-40QH4 MODEL OUTDOOR UNIT RAM-70QH4 RAM-80QH4 CLASS 1.0HP 2.0HP 1.0HP 1.5HP PHESE/VOLTAG E/FREQUENCY 230V 50Hz φ CAPACITY(kW) 2.5(1.0 2.8)
  • Page 8 TRIPLE SYSTEM MULTI R.A. . MULTIZONE 70H OOL / HEAT APA ITY SPE . FOR INDOOR UNITS OMBINATIONS TO BE ABLE TO OPERATE SIMULTANEOUSLY Whichever indoor units are installed, cooling and heating capacity depends on how many and which indoor units are operating at that time. MODEL : ＲＡＭ―７０ＱＨ４ ...
  • Page 9 ＣＯＯＬＩＮＧ  ＨＥＡＴＩＮＧ  ＰＯＳＳＩＢＬＥ      CAPACITY POWER AMPERE(A) CAPACITY POWER AMPERE(A)   ＣＯＭＢＩＮＡＴＩＯＮＳ  RATING（kW）  CONSUMPTION RATING（kW）  CONSUMPTION ２３０Ｖ  ２３０Ｖ    ＴＯ ＯＰＥＲＡＴＥ      （RANGE）  （RANGE）    （Ｗ）    （Ｗ）            2.5+2.5+2.5 2.33+2.33+2.33 2180 3.20+3.20+3.20 2480 10.9 (3.00〜7.90) (3.00〜10.60) (650〜3,180)
  • Page 10 RAM-70QH4 RIPLE SYS EM MUL I R.A.C INDOOR UNI S COMBINA IONS O BE ABLE O INS ALL 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. 2  INDOOR  NOMINAL CAPACITY ( kW ) SUITABLE ROOM SIZE (   m UNIT COOLING CAPACITY AT ONE UNIT OPERATION AT ONE UNIT OPERATION MODEL (kW) COOLING HEATING COOLING HEATING RAD-25QH4 1.00〜2.80 1.10〜4.70 11〜17 15〜18 RAF-25NH4...
  • Page 11 POSSIBLE SUITABLE CONNECTING POSITION ON OUTDOOR UNIT COMBINATIONS ROOM SIZE (VALVE DIAMETER)  (mm) TO INSTALL TO INSTALL NO.1 NO.2 NO.3 6.35/9.52D 6.35/9.52D 6.35/9.52D (ｍ  )      2.5+2.5+2.5 (10〜13)+(10〜  1 3)+(10〜13) 2.5+2.5+3.5 (10〜13)+(10〜  1 3)+(12〜15) THREE 2.5+2.5+4.0 (9〜11)+(9〜11)+(16〜  2 0) UNITS 2.5+2.5+5.0 (9〜11)+(9〜11)+(18〜  2 2) ☆ 5.0 2.5+3.5+3.5 (10〜13)+(13〜  1 6)+(13〜16) 2.5+3.5+4.0 (9〜11)+(11〜14)+(16〜20) (9〜11)+(11〜14)+(18〜22)
  • Page 12 QUADRUPLE SYSTEM MULTI R.A. . MULTIZONE 80H OOL / HEAT APA ITY SPE . FOR INDOOR UNITS OMBINATIONS TO BE ABLE TO OPERATE SIMULTANEOUSLY Whichever indoor units are installed, cooling and heating capacity depends on how many and which indoor units are operating at that time. MODEL : ＲＡＭ―８０ＱＨ４ ...
  • Page 13 ＣＯＯＬＩＮＧ  ＨＥＡＴＩＮＧ  ＰＯＳＳＩＢＬＥ      POWER AMPERE(A) POWER AMPERE(A) CAPACITY CAPACITY   ＣＯＭＢＩＮＡＴＩＯＮＳ  RATING（kW）  CONSUMPTION RATING（kW）  CONSUMPTION ２３０Ｖ  ２３０Ｖ    ＴＯ ＯＰＥＲＡＴＥ      （RANGE）  （RANGE）  （Ｗ）  （Ｗ）        2.5+2.5+2.5 2.50+2.50+2.50 2420 10.6 3.40+3.40+3.40 2530 11.1        ...
  • Page 14 RAM-80 H4 UADRUPLE SYSTEM MULTI R.A.C INDOOR UNITS COMBINATIONS TO BE ABLE TO INSTALL Two,three or four indoor units can be installed with one outdoor unit,  while htree or four is desirable.  And total nominal cooloing capacity should not be more than 12.0kW. 2  INDOOR  NOMINAL CAPACITY ( kW ) SUITABLE ROOM SIZE (   m UNIT COOLING CAPACITY AT ONE UNIT OPERATION AT ONE UNIT OPERATION MODEL (kW) COOLING HEATING COOLING HEATING RAD-25QH4 1.00〜2.80 1.10〜4.70 11〜17 15〜18 RAF-25NH4 1.00〜2.80 1.10〜4.70 11〜17 15〜18...
  • Page 15 SUITABLE CONNECTING POSITION ON OUTDOOR UNIT POSSIBLE ROOM SIZE (VALVE DIAMETER)  (mm) COMBINATIONS TO INSTALL NO.1 NO.2 NO.3 NO.4 TO INSTALL 6.35/9.52D 6.35/9.52D 6.35/9.52D 6.35/9.52D (ｍ  )      (10〜13)+(10〜13)+(10〜13) 2.5+2.5+2.5 (10〜13)+(10〜13)+(12〜15) 2.5+2.5+3.5 (9〜11)+(9〜11)+(16〜20) THREE 2.5+2.5+4.0 (9〜11)+(9〜11)+(18〜22) UNITS 2.5+2.5+5.0 ☆ 5.0 (10〜13)+(13〜16)+(13〜16) 2.5+3.5+3.5 2.5+3.5+4.0 (9〜11)+(11〜14)+(16〜20) 2.5+3.5+5.0 (9〜11)+(11〜14)+(18〜22) ☆ 5.0 2.5+4.0+4.0 (9〜11)+(14〜17)+(14〜17) 2.5+4.0+5.0 (9〜11)+(14〜17)+(18〜22) 3.5+3.5+3.5...
  • Page 16 EATURES 1. NEW RE RIGERANT (1) New refrigerant R410A with no harmful effect on the ozone layer Refrigerant R410A, which does not damage the ozone layer, was adopted instead of HCFC-22 which is planned to be phased out globally by 2020. (2) New refrigerating oil The new refrigerant HFC-R410A is not compatible with conventional mineral oils and no lubrication can be expected with those oils.
  • Page 17 2. Refrigerant Piping Materials (1) Thickness of Refrigerant Piping Although the thickness is same as Nominal Outside Thickness that for HCFC-22 model, as R410A diameter diameter (mm) (mm) model features higher pressure, be sure to confirm the thickness prior to 6.35 use.
  • Page 18 3. Servicing Tools Changes in the Product and Components 〈 〉  In order to prevent any other refirigerant from being charged, R410A model is provided with the outdoor      unit whose control valve has a different service port diameter (port size: 7/16 UNF 20 threads per inch 1/2 UNF 20 threads per inch).
  • Page 19 4. Servicing work (Rerfigerant recharging) Working steps Compound Pressure 1. Connect the charge hose to outdoor unit. pressure gauge gauge Gauge manifold 0.1MPa 2. Connect the vacuum pump adapter to the Handle Lo vacuum pump. Connect the 1/2" conversion adapter to the vacuum pump adapter. Handle Hi Connect the charge hose to the conversion...
  • Page 20 ODEL RAF-25NH4, RAF-50NH4 1. Top and Bottom Air Blow System During heating, this air conditioner blows warm air from the bottom as well as from the top outlet as in previous models. When the fan speed is set to "HI" or "AUTO" for cooling, the air conditioner blows cool air from both top and bottom, which allows rapid cooling.
  • Page 21 (2) Damper state in each operation mode If the Air outlet switch is set to , the damper at the bottom air outlet and air flow from the bottom will ●  be as follows according to the settings of the operation switch and fan speed select buttons: When the set room Operation Fan speed...
  • Page 22 2. Damper Mechanism (1) Disassembly diagram of damper mechanism Damper limit switch Discharge frame Damper motor (2) Damper operation theory The damper and the link connected to the damper moves at the same time by turning the motor. Drain pan Damper Damper limit switch Damper...
  • Page 23 MODEL RAD-25QH4, RAD-40QH4 1. The indoor unit includes a built-in drain pump, and draning is performed from the upper part of the indoor unit. 2. Installation can be selected from three thpes of duct conditions. ULL DUCT DISCHARGE GRILLE INDICATOR AIR DEFLEDTOR SUCTION GRILLE FILTER...
  • Page 24 NSTALLAT ON Height difference Piping length RAM-70QH4 RAM-70QH4 Indoor unit 1 Indoor unit 2 Indoor unit 3 Height difference between indoor units should be not more than 5m. Outdoor unit Indoor unit Indoor unit Indoor unit Outdoor unit (Within ±10m) = Maximum 60m (However, L = Maximum 35m)
  • Page 25 [Outdoor unit installation] ¥ The pipe connection ports of the outdoor unit and connectable indoor units are shown below. (Connection of the compressors is as shown below.) AM-70QH4 ¥ To the outdoor unit, up to three indoor units can be connected until the total value of each unit's capacity from 5.0kW to 11.0kW. ¿6.35 (1/4") Flare adaptor for piping One unit of 2.5kW, or...
  • Page 26 ONSTRU TION AND DIMENSIONAL DIAGRAM MODEL RAF-25NH4, RAF-50NH4   Unit: mm standard underfloor piping φ       Wireless remote controller     hole position   Cabinet Front panel   ℃ Indicator outlet     Infrared receiver   Small pipe  ...
  • Page 27 MODEL RAD-25QH4, RAD-40QH4 Unit : mm Indication panel   Wireless remote controller Electric                       ( Possible move , side ) Right         Hanger               ( Use unit ) hanging...
  • Page 28 MODEL RAM-70QH4 Unit: mm Narrow  side  (φ6.35) Service  valve  for  indoor  unit  No.1 Wide  side  (φ9.52) Narrow  side  (φ6.35) Service  valve  for  Wide  side  (φ9.52) indoor  unit  No.2 Narrow  side  (φ6.35) Service  valve  for  Wide  side  (φ9.52) indoor  unit  No.3 Handle Handle Handle Service  space suction outlet Holes  for  anchor  bolt ( 2-φ8.0  bolt ) above above Upper  above  200 Holes  for  anchor  bolt ( 2-φ8.0  bolt ) In  case  of  instaling  enclosed  receiver  tank,   ...
  • Page 29 MODEL RAM-80QH4 Unit: mm Narrow  side  (φ6.35) Service  valve  for  indoor  unit  No.1 Wide  side  (φ9.52) Narrow  side  (φ6.35) Service  valve  for  Wide  side  (φ9.52) indoor  unit  No.2 Narrow  side  (φ6.35) Service  valve  for  Wide  side  (φ9.52) indoor  unit  No.3 Narrow  side  (φ6.35) Wide  side  (φ9.52) Service  valve  for  indoor  unit  No.4 Handle Handle Handle outletn suction Service  space Holes  for  anchor  bolt ( 2-φ8.0  bolt ) above above Upper  above  200 Holes  for  anchor  bolt ( 2-φ8.0 ...
  • Page 30 AIN PARTS CO PONENT PRINCIPAUX CO POSANTS THERMOSTAT THERMOSTAT Thermostat Specifications CaractŽristiques du thermostat MODEL MODéLE RAF-25NH4, RAF-50NH4 RAD-25QH4, RAD-40QH4 THERMOSTAT MODEL MODéLE DE THERMOSTAT OPERATION MODE MODE DE FONCTIONNEMENT COOL REFRIGERATION HEAT CHALEUR COOL REFRIGERATION HEAT CHALEUR ON MARCHE 15.7 (60.3) 19.0 (66.2) 14.9 (59.3)
  • Page 31 COMPRESSOR COMPRESSEUR Compressor Motor Specifications CaractŽristiques du moteur de compresseur MODEL MODéLE RAM-70QH4, RAM-80QH4 COMPRESSOR MODEL MODéLE DE COMPRESSEUR EU1013DD PHASE PHASE SINGLE SIMPLE RATED VOLTAGE TENSION NOMINALE 230V RATED FREQUENCY FREQUENCE NOMINALE 50Hz POLE NUMBER NOMBRE DE POLE WHITE BLANC CONNECTION CONNEXION...
  • Page 32 IRING DIAGRAM BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE INDOOR UNIT   GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED BLK : BLACK PNK : PINK : VIOLET MODEL RAF-25NH4, 50NH4 TERMINAL BOARD CONNECTING...
  • Page 33 REACTOR   SYSTEM SYSTEM REACTOR   POWER MODULE POWER MODULE         COMPRESSOR ( WHT ) CN12   DIODE ( SP ) DIODE SMOOTHING SMOOTHING STACK STACK   CAPACITOR CAPACITOR   ( SP ) 330μF×3 〜 〜 330μF×3 〜...
  • Page 34 REACTOR  A SYSTEM SYSTEM REACTOR  B POWER  MODULE  A POWER  MODULE  B COMPRESSOR  A ( WHT ) CN12 DIODE DIODE ( SP ) SM00THING STACK  A SM00THING STACK  B CAPACITOR CAPACITOR 330μF×3 〜  〜  〜  〜  ( SP ) 330μF×3 ( SP ) CN14 CN13...
  • Page 35 IRING DIAGRAM OF THE PRINTED IRING BOARD SCHƒMA ELECTRIQUE DU CIRCUIT IMPRIMƒ Remote controller (RAR-2P2) TŽlŽcommande (RAR-2P2) １   Ｓ Ｅ Ｇ １ ５   Ｓ Ｅ Ｇ ２ ０   ４ ０   ２   Ｓ Ｅ Ｇ ０   Ｓ...
  • Page 36 Ｃ Ｎ １ ０   Ｘ Ａ− ６ Ｐ − Ｔ Ｏ Ｐ （Ｒ Ｅ Ｄ）   ６   Ｃ Ｎ ３   Ｘ Ａ− ５ Ｐ − Ｔ Ｏ Ｐ   ５   ２   １ ２ Ｖ  Ｃ Ｊ １ ０ ２   ４...
  • Page 38 MODEL RAM-70QH4 １  ２  ３  ４  ５  ６  ７  ８  ９  １０  １１  １２  １３  １４  １５  １６  Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ Ｃ  Ｂ Ｌ Ｕ  Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ  Ａ  Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ  Ｂ  Ｙ...
  • Page 39 MODEL    RAM-80QH4 １  ２  ３  ４  ５  ６  ７  ８  ９  １０  １１  １２  １３  １４  １５  １６  Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ Ｃ  Ｂ Ｌ Ｕ  Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ  Ａ  Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ  Ｂ  Ｙ...
  • Page 40 Power source 1¿ 230V 50Hz Indoor unit 1 Terminal High voltage Negative Wireless receive LCD wireless board unit ion electrode circuit Buzzer circuit Room temperature thermistor Operation. Indicating lamp Timer. Damper limit switch Drain pump motor DC fan motor (RAD-28QH4, 40QH4 ONLY) Humidity sensor control circuit Stepping motor for...
  • Page 41 ASIC MODE MODEL RAF-25NH4, RAF-50NH4, RAD-25QH4, RAD-40QH4 Operation mode Cooling Dehumidifying Heating Auto Basic operation of start / stop switch tart tart tart / stop switch Operation lamp tart / stop switch Reserve switch Cancel switch Operation lamp Off-timer Timer lamp Timer memory (Off-timer during stop) (Change in reserved time)
  • Page 42 Table 1 Fan speed by mode MODEL RAF-25NH4 RAF-50NH4 Operation REQUIRED VALUE REQUIRED VALUE ＮＯ．    LABEL NAME Fan speed mode Label name mode OF UNIT SIDE OF UNIT SIDE   WMAX̲M 5300 min-1 4500 min-1 Ultra Lo FWSS WMAX2̲M 5300 min-1 4500 min-1 Sleep FWSOY WSTD̲M 4000 min-1 4000 min-1 WJKMAX̲M 3700 min-1 4000 min-1 Overload FWKAF WBEMAX̲M...
  • Page 43 Tabl e 1 Fan speed by mode RAD-25QH4 RAD-40QH4 Operation mode Fan speed mode Label name PROM LABEL NAME ． REQUIRED VALUE OF UNIT SIDE Ultra Lo AFWSS Sleep WMAX 5300 min-1 4500 min-1 AFWSOY WMAX2 5300 min-1 4500 min-1 AFWS Heating Overload...
  • Page 44 REQUIRED VALUE ＮＯ．    LABEL NAME Ｍ Ｏ Ｄ Ｅ  OF UNIT SIDE     Outdoor temperature of less than 40℃    080H  PSTARTC1$ 1 unit   operation Outdoor temperature of 40℃ or more 081H  PSTARTC1K$ COOLING OPERATION Outdoor temperature of less than 40℃    082H  PSTARTC2$ 2 unit   operation Outdoor temperature of 40℃ or more 083H  PSTARTC2K$ Except the indoor setting wind velocity LOW 084H  PSTARTH$ HEATING Common OPERATION Indoor setting wind velocity LOW 085H  PSTARTH2$ The degree of minimum valve difference 086H  PMIN$ Normal 087H  DFCTPS$...
  • Page 45 asic Cooling Operation CLMXTP Room temperature Temperature set for cooling and dehumidifying (value set by remote control: (+) SHIFTC) Fan speed set to ÒautoÒ Stop Stop Start Start Start/stop switch Thermo judgment Thermo OFF Table 1 Æ TCMAX Ultra-Hi Room Maximum speed temperature-set Indoor fan...
  • Page 46 ooling Sleep Operation Set to 7 hours Sleep key Operation lamp Timer lamp See besic operation Indoor fan Lo(sleep) Outdoor fan Notes: (1) The sleep operation starts when the sleep key is pressed. (2) If the operation mode is changed during sleep operation, the set temperature is cleared, and shift starts from the point when switching is made.
  • Page 47 ehumidifying Cooling efrost Indoor heat exchange temperature TEIOF Room temeprature 30sec. judgement Room temperature TEION Cooling defrost signal See basic operation. See basic operation. Cooling preset Indoor fan temperature 15sec. Outdoor fan Room temperature judgement Reversing valve (cooling ÒonÒ mode) Balance period Balance period 1min.
  • Page 48 asic Heating Operation Table 6 Speed Specifications during Ætd Steady Speed Period. Ætd (Hot dash time) Less than 10 minutes 2000min 1600min 10 - 20 minutes 3000min 2400min Heating set temperature (remote control set temperature 20 minutes or more 4000min 3200min (+) SHIFTW) Dash period...
  • Page 49 eating Sleep Operation Set to 7 hours Sleep key Operation lamp Timer lamp See basic operation. Indoor fan Lo(sleep) See basic operation. Outdoor fan Vertical air Shut deflector Horizontal Facing down Notes: (1) The sleep operation starts when the sleep key is pressed. (2) If the operation mode is changed during sleep operation, the changed operation mode is set and sleep control starts.
  • Page 50 MODEL RAM-70QH4 RAM-80QH4 Expansion valves ◇ ¥ The expansion valves are initialized when power is supplied. The valve for unit 1 is fully closed (520 pulses), and then that for unit 2 is fully opened (480 pulses). When the valve for unit 1 is fully closed (0 pulse), start-up is possible.
  • Page 51 CHANGING THE NUMBER OF UNITS TO BE OPERATED ¥ The following shows the operation status when the number of units to be operated is changed from 2 to 1, thermostat off, 1, 2 and then operation stop. [Cooling] Unit 1 Cooling Thermostat off Cooling...
  • Page 52 << Defrosting Start / Release Request Judgment >> ¥ The microcomputer retrieves temperature data from the heat exchange sensor data; it senses that defrosting starts when the operation mode is heating (other than defrosting), and that defrosting stops when it is still defrosting.
  • Page 53 DEFROSTING ¥ A reversing valve defrosting format is used, and the defrosting cycle consists of [balancing period of 90 seconds when defrosting starts -> reverse cycle period for 12 minutes maximum -> balancing period of 90 seconds when defrosting stops]. Since this system uses the outdoor heat-exchanger concurrently in two cycles, defrosting is executed for both cycles during 2-cycle heating operation.
  • Page 54 During two-cycle heating operation (main unit 1: thermostat on/main unit 2: operation stop/sub unit 1: thermostat on/sub unit 2: thermostat off) Ⅰ Defrosting signal Defrosting request between outdoor microcomputers Defrosting request from sub Unit 1 Unit 2 Unit 1 Unit 2 Unit 1 Defrosting request Unit 2...
  • Page 55 During two-cycle heating operation (main unit 1: thermostat on/main unit 2: thermostat off/sub unit 1: thermostat off/sub unit 2: operation stop) Ⅱ Defrosting signal Defrosting request between outdoor microcomputers Unit 1 Unit 2 Unit 1 Unit 2 Unit 1 Defrosting request Unit 2 Defrosting request Turns on for...
  • Page 56 AUTO FRESH DEFROSTING ¥ If auto fresh conditions are established when heating operation stops, defrosting operation can be executed during the stop period. Auto fresh defrosting consists of [balancing period of 90 seconds when defrosting starts →  reverse  cycle  period  for  12  minutes  maximum] (1) Auto fresh defrosting defrosting start conditions ¥...
  • Page 57 PROCESSING AT OVERHEAT THERMISTOR (OH) HIGH TEMPERATURE Restriction Start Conditions ◇ [Operating two units] in common for cooling and heating ¥ When either expansion valve counts 480 pulses and the OH temperature the compressor speed will decrease at a rate of ＞...
  • Page 58 When one unit is operated for heating: Unit 1 Unit 2 Cooling output Heating output Turns on for cooling Turns on for heating Outdoor fan 97¼C 94¼C temperature Decreases by 100 min /30s Compressor Target speed decreases rotation speed Increases by 50 min /30s OH  ≦  97℃,  current  speed  ≦  previous  speed Hold...
  • Page 59 ORCED COOLING Units can be operated in a cooling cycle to collect refrigerant. ･ The conditions for execution and operation status are as follows: [Conditions for execution] ¥Forced cooling operation will be executed when the forced cooling switch is turned ON and there is no record that all indoor units 1-4 have been operated.
  • Page 60 FORCED COOLING ¥ The following shows the operation state of forced cooling. Power Service switch Unit 1 Forced cooling request Balancing request Unit 2 Forced cooling request Balancing request Heating output Cooling output Turns on for cooling Turns on for heating Outdoor fan 15s + Operation...
  • Page 61 : Cooling, Dehumidifying, Defrosting Refrigirant flow RŽfrigŽration, dŽshumidification, dŽgivrage Circulation du rŽfrigerant : Heating Chauffage OUTDOOR UNIT INDOOR UNIT     Compressor (A) UNITƒ EXTERIEURE UNITƒ INTERIEURE Compresseur (A) Service valve Silencer Silencer Suction tank Vanne de service Silencieux Silencieux RŽservoir aspiration 9.52 φ...
  • Page 62 : Cooling, Dehumidifying, Defrosting Refrigirant flow RŽfrigŽration, dŽshumidification, dŽgivrage Circulation du rŽfrigerant : Heating Chauffage Compressor (A) OUTDOOR UNIT INDOOR UNIT     Compresseur (A) UNITƒ EXTERIEURE UNITƒ INTERIEURE Suction tank RŽservoir aspiration Silencer Service valve Silencer Silencieux Vanne de service Silencieux φ9.52 Reversing valve...
  • Page 63 UTO SWING FUNCTION MODEL RAD-25QH4, RAD-40QH4 PRESENT CONDITION INPUT SIGNAL OPERATING SPECIFICATION REFERENCE OPERATION OPERATION MODE AIR DEFLECTOR ONE SWING (CLOSING AIR DEFLECTOR) INITIALIZE AT NEXT 1 DOWNWARD STOP OPERATION. EACH MODE STOP 2 UPWARD KEY INPUT DURING ONE SWING STOP AT THE MOMENT.
  • Page 64 ESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAF-25NH4, RAF-50NH4 1. Power circuit FAN-MOTOR DC/DC POWER-SUPPLY CONVERTER CONTROL CIRCUIT 1CP2 CN10 CJ101 XA-5P-TOP(RED) INDOOR UPPER FAN MOTOR R121 Q111 CJ102 1CP1 L111 Q131 R114 Q115 Q113 D121 C133 Q112 ＋  ＋  ＋  IC121 − ...
  • Page 65 2. Reset Circuit Reset Microcomputer R522 IC521 Fig.2-1 Timing chart Voltage 5.0V pin of IC521 supply voltage ②  RES detecting voltage RES canceling voltage 4.4V 4.2V Voltage pin of IC521 output voltage ① 5.0V pin of microcomputer ⑦ Fig.2-2 Reset circuit is to initialize the indoor unit microcomputer when switching ON the power or after recovering from power failure.
  • Page 66 3. Room Temperature Thermistor Circuit A room temperature thermistor circuit is shown in Fig. 3-1. According to room temperature, the voltage of point becomes as it is shown in Fig.3-2. Room Temperature Micro computer Thermistor R305 Room temperature input R301 C302 Fig.
  • Page 67 6. Fan Motor Drive Circuit CN10 35V line Micro computer 5V line No of Fan Motor rotation output R751 C751 No of rotation detect R631 C631 Fig. 6-1 The voltage of point wave form T1 = Low no of rotation T2 = High no of rotation At T2 At T1...
  • Page 68 amper control 1. Precondition The damper has 2-directional output and realizes OPEN/CLOSE using a stepping motor. Damper control functions only when the Air outlet SW is set to Ò Ó.    2. OPEN/CLOSE Operation (1) OPEN operation Start up the damper towards OPEN direction by overall angle width [DNPALD1]. When the start up completes, turn off the output.
  • Page 69 ● Thermo  intermittence ain Power Remote control l e r operati o n Operation starts Thermo OFF Thermo ON Operating condition Stop Normal operation Normal operation Operation lamp Upper fan 10sec. Setting fan speed Lo Ul t ra-Lo Setting fan speed Lower fan 10sec.
  • Page 70 ooling mode The damper opens at cool dash (excluding smell prevention) and closes at the completion of cool dash. The damper also closes at the moment the Air outlet SW is set to Ò Ó.    ● Dash operation (no smell prevention) ain Power Remote control l e r operati o n Operati o n starts Dash operati o n starts Thermo OFF (Dash remove)
  • Page 71 ESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAD-25QH4, RAD-40QH4 1.Reset Circuit Q202 Normal:Hi Reset    ZD201 Micro computer Fig.1-1 Voltage 35V DC Line 5V DC Line Base of Q201 Power is OFF Power is ON Collector of Q202 Fig.1-2 ¥ The reset circuit initializes the program when power is supplied or power is restored following a power failure. ¥...
  • Page 72 2.Receive Circuit R419 C405 Wireless input R601 Light receiving unit C610 C601 Micro computer ¥ The Light receiving unit receives an infrared signal from the wireless remote control. The receiver amplifies and shapes the signal and outputs it. 3.Buzzer Circuit R701 Micro computer Q701...
  • Page 73 4.Auto Sweep Motor Circuit Auto sweep motor for hirizontal air deflectors Micro Computer Rotor IC701 Fig.4-1 Auto Sweep Motor Circuit (Horizontal air deflectors) ¥ Fig.4-1 shows the Auto sweep Motor drive cicuit; the signals shown in Fig.4-2 are output from pins 39 42 of the micro computer.
  • Page 74 5.Room Temperature Thermistor Circuit The Voltage at depends on the room temperature as shown in Fig. 5-2 Fig. 5-1 shows the room temperature thermistor circuit. Room temperature thermistor Micro computer R322 Room temp. input C321 R321 Fig. 5-1 Room temperature( ℃...
  • Page 75 7. Initial Setting Circuit (IC401) ¥ When power is supplied, the micro computer reads the data in IC401 (E PROM) and sets the preheating activation value and the rating and maximum speed of the compressor, etc. to their initial values. Micro computer C401 R406...
  • Page 76 10. Drain pump trial run switch R522 R527 Drain pump Microcomputer trial run SW (normally, Hi) ¥ This switch forcibly turns the drain pump on. When the drain pump trial run switch is turned on, the timer indicator will blink seven times, and no remote signal will be accepted. 11.
  • Page 77 12. DC Fan Motor Drive Circuit MODEL RAD-25QH4, RAD-40QH4 ¥ Fig. 12-1 shows the indoor DC fan motor drive circuit. L101 ICP2 L901 Q901 (Terminal board C) R912 Micro computer Q902 D901 C902 R911 Indoor DC R913 fan motor R914 R915 CN10 Fan PWM ...
  • Page 78 13. High static-pressure switch (Full duct type and semi duct type) Main P.W.B. Buzzer Micro computer Drain pump test drive sw Static pressure sw Normal High Fig. 13-1 ¥ For full duct type and semi duct type, set the high to HIGH STATIC-PRESSURE. ¥ If not set to HIGH, there will be reduction of cooling and heating capacities.
  • Page 79 RAM-70QH4, RAM-80QH4 POWER SUPPLY CIRCUIT The power supply circuit consists of the circuit (A cycle) corresponds to the indoor units 1 and 2, and the circuit (B cycle) corresponds to the indoor units 3 and 4. REACTOR A REACTOR B SYSTEM POWER SYSTEM POWER MODULE A...
  • Page 80 Functions of Main Parts ● (1)System Power Module (SPM) < Reference > In the case of malfunction or defective connection: (The module was a new type which joined ● Immediately after the compressor starting, it may stop together old type ACT and POWER modules) due to "Abnormal low speed"...
  • Page 81 (5) C001-C014, NF COIL 1 Be sure to make an earth line for the outdoor unit. If not, the   ※  These coils absorb electrical noises generated during noise filter circuit does not work normally.      the compressor is operating and invasive noises  ...
  • Page 82 2. Interface Circuit The function of the interface circuit is to perform: ● Communications between the indoor and outdoor units by mean of superimposing an A.C. signal (f=38kHz, amplitude 1V) on the 35V D.C. line supplied from the outdoor unit to the indoor unit. The circuit consists of three small circuits and one part as below.
  • Page 83 SW - D -P .W .B. Control P.W.B. Approx. DC35V Sending B cycle switching A cycle switching power supply circuit power supply circuit Micro computer for indoor unit 3 and 4 for indoor unit 1 and 2 (for A cycle) 35V B 35V A BEN12V B...
  • Page 84 ※  Explaining an example of checking for table. 2- 1 (A) : Communication error 1 (LD 303A or LD 303B one time blink) In the case of the indoor unit 1 (or 3) is in the communication error and the indoor unit 2 (or 4) is normal: At first, check the connections of the in/outdoor connecting cables in the indoor and outdoor units (wrong connection, poor insertion etc).
  • Page 85 Fig. 3-1 shows the power module and its peripheral circuit. ●    The three transistors on the positive + side are called the upper arm, and the three transistors on the negative - side, the lower arm. RAM-70QH4 and RAM-80QH4 have two power module circuits as shown in Fig. 3-1 because of providing for two cycles and two compressors style. ●   ...
  • Page 86 DC 320-360V is input to power module and power module switches power supply current according to rotation ●    position of magnet rotor. The switching order is as shown in Fig. 3-2. At point E: U + is ON, V - is ON (circuit in Fig. 3-1)           ...
  • Page 87 System Power module 2 260-330V DC compressor motor U coil V coil W coil DC current (Id) detection resistor Fig. 3-4 Power module circuit (U + is ON, V - is ON) only when U + transistor is ON, the current waveform at point Since current flows at point becomes ●...
  • Page 88 4. P.W.B Power Supply Circuit (Switching Power Circuit) Ｒ Ｅ Ａ Ｃ Ｔ Ｏ Ｒ Ｃ  Ｂ Ｌ Ｕ  Ｂ Ｌ Ｕ  Ｙ Ｅ Ｌ   Ｙ Ｅ Ｌ   （Ｓ Ｐ Ｉ Ｒ Ａ Ｌ）   （Ｓ Ｐ Ｉ Ｒ Ａ Ｌ）   Ｔ...
  • Page 89 (1) Switching power supply circuit for outdoor control P.W.B. SW transformer 1 Input voltage 230V AC Approx. 325V DC Fig. 4-2 Switching power supply circuit for outdoor control P.W.B. Fig. 4-2 shows the switching power supply for the outdoor control P.W.B. The switching power supply for the outdoor control P.W.B.
  • Page 90 (2) Switching power supply for indoor unit Fig. 4-3 shows the switching power supply circuit for the indoor units. SW transformer 2 3A, fuse Input voltage after rectification, approx. 325V DC It is supplied via ※ CN1 from control A cycle P.W.B..
  • Page 91 If the 3A fuse has broken , the switching power circuit is defective. Replace the SW-D-P.W.B.. ● In the case of that the 5A fuse in the control P.W.B has broken. ● (1) If the varistor 3 has broken, the terminal board L/N was supplied a excessive voltage. Although the switching power circuit is normal , but have to check the DC voltage that leads to the terminal board L/N terminal, and replace the varistor 3 and 5A fuse.
  • Page 92 . Overload control ciricuit (OVL control circuit) ¥ Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state, in order to protect the compressor, electronic components and power breaker. ¥...
  • Page 93 6. Temperature Detection Circuit The outdoor unit (this model) provides with the outdoor temperature thermistor, DEF (defrost) thermistor, OH (overheat) ● thermistor and electric expansion valve thermistor so that they detect the temperatures of the unit and control the system. The circuit of the thermistors is shown as Fig.
  • Page 94 Table 6-1 Name and Role of each thermistor Name Connector No Measuring Point Role If the temperature of the compressor OH thermistor A CN4A A cycle compressor head rises abnormally (118¡C), the compressor will be stopped. The OH thermistor B CN4B B cycle compressor head temperature is used to decide the...
  • Page 95 When the connectors of the thermistors are disconnected or the thermistors is open or short, LD301A (red) lights and ● LD302A (orange) blinks so that they indicate troubled parts. Combinations of LD301A and LD302A, LD301B and LD302B are set up for indicating troubled thermistors of A cycle and B cycle each. The correspondences between the number of blink time and troubled parts are shown as Table 6-3.
  • Page 96 . Power Factor Control Circuit Power factor is controlled by almost 100%. (Effective use of power) With IC in ACT module, control is performed so that input current waveform will be similar to waveform of input voltage. I (input current) input voltage V (input voltage) Effective...
  • Page 97 (1) Boosting and varying DC voltage Vd It boosts the DC voltage to the valve corresponds to the rotation speed with a detected DC voltage by the micro computer. Its component is basically made of a boosting chopper circuit. ACT element Reactor Compressor Analog voltage...
  • Page 98 ERVICE CALL Q&A COOLING MODE The compressor has stopped Check if indoor heat If the air conditioner operates suddenly during cooling exchanger is frosted. in cooling mode when it is operation. Wait for 3-4 minutes until cold, the evaporator may get it is defrosted.
  • Page 99 UTO FRESH DEFROSTING After the ON/OFF button is pressed to Auto Fresh Defrosting is carried out : the system stop heating, the outdoor unit is still checks the outdoor heat exchanger and defrosts it working with the OPERATION lamp as necessary before stopping operation. lighting.
  • Page 100 T ST RTING OPER TION To ensere correct opening and closing of the When only the power switch is damper, the damper will move when power is turned on, the damper at the bottom turned on or the unit is to be operated in order to air outlet moves even if the check its fully opened and closed positions.
  • Page 101 Air does not flow immediately after Preliminary operation is performed for one minute operation is started. when the power switch is turned on and heating or dehumidifying is set. The operation lamp blinks during this time for heating. This does not indicate a fault.
  • Page 102 ISASSEMBLY AN REASSEMBLY MODEL RAF-25NH4, RAF-50NH4 1. AIR FILTER Clean the air filter, as it removes dust inside the room. Be sure to clean the filter once every two weeks so as not to consume electricity unnecessarily. PROCE URE Open the front panel. ¥...
  • Page 103 3. FRONT COVER Remove the four securing screws of the front cover, and then pull the front cover towards you. When attaching the front cover, insert the front cover tabs into these openings. Securing screw Cabinet Front cover TT CHING When attaching the front cover, fit the three tabs on the top of the front cover so that they enter the openings on the top frame (insert from a slightly raised position).
  • Page 104 Top frame Stepping motor Cabinet Securing screw Internal electrical parts TT CHING (1) When attaching the top frame, align the left and right of the top frame with the inside of the guides on the cabinet, and then push the top frame straight to the back. Note: Check to see that there is no space between the top frame and the cabinet.
  • Page 105 Cabinet Section B Discharge frame 7. DAMPER MOTOR-DAMPER LIMIT SWITCH (1) Remove the securing screw of the damper limit switch. (2) Remove the two securing screws of the damper motor (stepping motor). (3) Pull out the damper motor and the damper limit switch, and then remove them. Damper limit switch Discharge frame Damper motor...
  • Page 106 TT CHING Note - Don't touch the ion generating tip when replacing the electrode. - The ion generating tip must be replaced if it is bent. - Clean the electrode with a toothbrush if dust gathers on the electrode. Even if this happens, be sure not to touch the ion generating tip. 9.
  • Page 107 (10) Use a minus screwdriver or other such tool to raise the two tabs (see arrows in diagram below) securing the right side of the heat exchanger, then pull out the heat exchanger towards you. (11) Pull the lower section of the fan motor support towards you while raising the two levers (tabs) on the left and right of the upper and lower sides of the fan motor support securing the fan motor, and then remove the fan motor support.
  • Page 108 ROUBLE SHOO ING MODEL RAM-70QH4, RAM-80QH4 PRECAUTIONS FOR CHECKING Power source V, 50Hz φ, 230 ◯ DANGER Remember that the Compressor motor 0V line is biased to 190V in reference to (0V) ◯ the ground level. Indoor unit1 Also note that it takes about 10 minutes MAIN P.W.B.
  • Page 109 DISCHARGING CAPACITORS Turn off the indoor unit's power switch or unplug the power cord, and wait for a minute or so. Open the cover of the electric parts compartment. Discharge electricity from smoothing capacitors (330µF x 3pcs.) by connecting the leads of a soldering iron of 30-75W to the terminals provided for this purpose.
  • Page 110 NSPECT NG EXTERNAL ELECTR CAL PARTS ¥ Check to see that the LED is either on or blinking. ¥ LEDs are divided between those for A cycle and those for B cycle. This is determined by either an A or a B appearing in the circuit code, for example LD301A or LD301B.
  • Page 111 nspection method 1 LED on Insert the power source, and check to see that the Follow "Inspecting external electrical parts" and check LED is on. the cause of the problem. LED off Connect a commercial-use 230V power source Is AC230V flowing to the L/N terminal? to the L/N terminal.
  • Page 112 nspection method 2 Check the number of times LD301 blinks. LD301: Blinks once The power source or some other reason may have caused the microcomputer Reset stop to reset. Replace the control P.W.B. if the LED blinks once and then stops frequently during operation.
  • Page 113 External fan Burnt out rotates LD301: Blinks five times Insert the power source and operate, and The FM P.W.B. is broken. Check to see that the 2A fuse of the FM then check to see that the external fan is Overload stop Replace the FM P.W.B..
  • Page 114 AC196V-265V LD301: Blinks ten times Check the power source voltage Check the wiring (diode stack Power source voltage (terminal board, L/N terminal) blue/yellow/gray/red CN13) abnormally abnormally noise AC196V or less or AC265V or more Danger! Quickly turn off the power Less than AC196V Power source abnormally.
  • Page 115 nspection method 3 Check the on status of LD301 and the blinking of LD302. LD301A:On LD301B: On A cycle thermistor abnormally. B cycle thermistor abnormally LD302A: Blinking LD302B: Blinking LD302A: Blinks once LD302B: Blinks once Replace OH Replace OH OH thermistor B thermistor B.
  • Page 116 nspection method 4 Check the number of times LD303 blinks. Communications abnormally between microcomputers. LD303A blinks LD303B blinks LD303A blinks once Check the internal P.W.B. connected External microcomputer to the internal unit in question *1 A internal unit 1 communications error Normal abnormally The internal control...
  • Page 117 * 1 Example of indoor P.W.B. checking method (when indoor unit 1 is displayed as broken) Reinsert the connecting cord of indoor unit 1 (the indoor unit with a communications error) and indoor unit 2 (the indoor unit where communications are possible) (turn off the power source before disconnecting and reinserting the connecting cord) indoor unit 2 communications error indoor unit 1 communications error LD303 blinks twice...
  • Page 118 OW TO OPERATE USING T E SERVICE SWITC T E OUTDOOR UNIT MODEL RAM-70QH4, RAM-80QH4 1. Turn the Power switch off and then turn on again. 2. Remove the electrical parts cover. 3. Press the service switch for one second or more (wait for at least 20 seconds after turning the power source switch on).
  • Page 119 IGHTING MODE OF THE SE F-DIAGNOSIS AMP MODEL RAM-70QH4, RAM-80QH4 INSTA ATION POSITION OF SE F-DIAGNOSIS AMP Positions of self-diagnosis lamps (LEDs) COMPRESSOR COMPRESSOR STRIP SIDE SIDE     ROOMS MULTI MODEL HAVE         ONLY TERMINAL BOARD  ...
  • Page 120 LIGHTING ODE OF THE SELF-DIAGNOSIS LA P ODEL RA -70QH4, RA -80QH4 DANGER ( DC360V ) DANGER ( COURANT  CONTINU  DE  360V ) WAIT FOR FIFTEEN- INUTES ( IN.) EVER INUTES ( IN. ) ATTENDRE QUINZE ËPRES AVOIR CO UTƒ ●...
  • Page 121 ROUBLE SHOO ING OF HE SYS EM POWER MODULE MODE GT15J31ISM COLLECTOR GATE ELEMENT CIRCUIT   EMITTER INTERNAL CIRCUIT OF THE MODULE TERMINAL SYMBOL OF SYSTEM POWER MODULE SEE NEXT PAGE   FOR VALUES MEASURED BY TESTER. L2 L1 * Do not disassemble the system power module when performing the diagnosis.
  • Page 122 OW TO C ECK POWER MODULE Checking power module using tester Set tester to resistance range ( 100) × If indicator does not swing in the following conductivity check, the power module is normal. (In case of digital tester, since built-in battery is set in reverse direction, + and - terminals are reversed.) CAUTION If inner circuit of power module is disconnected (open), the indicator of tester will not swing and this may assumed as normal.
  • Page 123 ROUBLESHOO ING WHEN HE IMER LAMP BLINKS Fan Motor Set Wind Volocity and DC Voltage (between blue and red) characteristics. MODEL RAF-32QH1 MODEL RAD-28QH4, RAD-40QH4 Perform troubleshooting according to the number of times the timer lamp on the display of the indoor unit blinks. MODE FAN SPEED Connector blue - red voltage (V)
  • Page 124 HE KING THE INDOOR UNIT ELE TRI AL PARTS [Model : RAF-25NH4, RAF-50NH4, RAD-25QH4, RAD-40QH4] 1. Power does not come on (no operation) Check the indoor/outdoor unit Is 35V DC being generated Is 230V AC being generated connecting cord, and correct any between terminals C and D on between terminals L and N on defective section (wrong...
  • Page 125 2. Only indoor fan does not operate (others are normal) Is 5V DC being generated Is 25-35V DC being generated Replace the indoor fan motor. between blue and yellow of CN10, between blue and red of CN10, CN15? CN15 in the "Hi" fan mode? Check according to the proper method for checking the power circuit.
  • Page 126 4. All systems stop from several seconds to several minutes after operation is started (all indicators are also off) Set to the ÒHiÓ fan mode. The operation lamp lights once and goes out in 5-10 seconds. Disconnect CN10, CN15 and set to the fan mode again. Check to see if shorting, etc.
  • Page 127 PARTS IST AND DIAGRAM ISTE DES PIECES DE RECHANGE MODEL RAF-25NH4, RAF-50NH4 MODELE...
  • Page 128 MODEL RAF-25NH4 MODELE Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAF-25NH4 UNITÉ ATI-0972B FAN MOTOR (UPPER) MOTEUR DE VENTILATEUR (SUPERIEUR) ATI-0972B TANGENTIAL FAN (UPPER) VENTILATEUR TANGENTIEL (SUPERIEUR) RAS4010LX2 FAN SUPPORT ASSEMBLY SUPPORT DE VENTILATEUR ATI-0972B FAN MOTOR (LOWER) MOTEUR DE VENTILATEUR (INFERIEUR) ATI-0972B...
  • Page 129 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAF-25NH4 UNITÉ ATI-0972B ACCESSARIES ASSEMBLY ASSEMBLÉE D’ACCESSARIES RAF-25NH4 FRONT PANEL PANNEAU FRONTAL ATI-0972B DAMPER LIMIT SWITCH INTERRUPTEUR LIMITEUR DU DÉFLECTEUR ATI-0972B BAND (FOR FRONT PANEL) BAND (POUR LE PANNEAU AVANT) RAP-5CPJ LATCH 1 (FRONT COVER) VERROU 1 (CAPOT AVANT)
  • Page 130 MODEL RAF-50NH4 MODELE Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAF-50NH4 UNITÉ ATI-0972B FAN MOTOR (UPPER) MOTEUR DE VENTILATEUR (SUPERIEUR) ATI-0972B TANGENTIAL FAN (UPPER) VENTILATEUR TANGENTIEL (SUPERIEUR) RAS4010LX2 FAN SUPPORT ASSEMBLY SUPPORT DE VENTILATEUR ATI-0972B FAN MOTOR (LOWER) MOTEUR DE VENTILATEUR (INFERIEUR) ATI-0972B...
  • Page 131 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAF-50NH4 UNITÉ ATI-0972B ACCESSARIES ASSEMBLY ASSEMBLÉE D’ACCESSARIES RAF-25NH4 FRONT PANEL PANNEAU FRONTAL ATI-0972B DAMPER LIMIT SWITCH INTERRUPTEUR LIMITEUR DU DÉFLECTEUR ATI-0972B BAND (FOR FRONT PANEL) BAND (POUR LE PANNEAU AVANT) RAP-5CPJ LATCH 1 (FRONT COVER) VERROU 1 (CAPOT AVANT)
  • Page 132 MODEL RAD-25QH4, RAD-40QH4 MODELE...
  • Page 133 MODEL RAD-25QH4 MODELE Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAD-25QH4 UNITÉ RAD-28MX DRAIN PAN BAC DE CONDENSATS RAMD-350BW FAN MOTOR SUPPORT RUBBER SUPPORT DE MOTEUR DE VENTILATEUR CAOUTCHOUTE RAMD-350BW SPECIAL SCREW VIS SPECIALE RAMD-28GX PUMP ASSEMBLY POMPE RAMD-350BW...
  • Page 134 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAD-25QH4 UNITÉ RAD-28QH1 FAN MOTOR SUPPORT SUPPORT DE VENTILATEUR RAD-25QH4 BASE (FAN MOTOR) BASE (MOTEUR DE VENTILATEUR) RAS-2236W LED-YELLOW (SEL2713K) LED-JAUNE (SEL2713K) RAS-25DXD LIGHT RECEIVING UNIT MODULE DE RECEPTION DE LUMIERE RAS-2553W LED-GREEN (SEL2413E) LED-VERTE (SEL2413E)
  • Page 135 MODEL RAD-40QH4 MODELE Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAD-40QH4 UNITÉ RAD-28MX DRAIN PAN BAC DE CONDENSATS RAMD-350BW FAN MOTOR SUPPORT RUBBER SUPPORT DE MOTEUR DE VENTILATEUR CAOUTCHOUTE RAMD-350BW SPECIAL SCREW VIS SPECIALE RAD-28MX ASSEMBLY PUMP POMPE RAMD-350BW...
  • Page 136 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAD-40QH4 UNITÉ RAD-28QH1 FAN MOTOR SUPPORT SUPPORT DE MOTEUR DE VENTILATEUR RAD-25QH4 BESE (FAN MOTOR) BASE (MOTEUR DE VENTILATEUR) RAS-2236W LED-YELLOW (SEL2713K) DEL-JAUNE (SEL2713K) RAS-25DXD LIGHT RECEIVING UNIT MODULE DE RECEPTION DE LUMIERE RAS-2553W LED-GREEN (SEL2413E)
  • Page 137 24 ( B ) 24 ( A ) 21(B) 21 ( A ) 416 ( A ) 117 ( A ) 117 ( B ) 416 ( B ) 900 ( B ) 900 ( A )
  • Page 138 MODEL RAM-70QH4 MODELE Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAM-70QH4 UNITÉ RAM-70QH4 P.W.B. (MAIN) CIRCUIT IMPRIME (PRINCIPAL) RAM-70QH4 P.W.B. (SWITCH) CIRCUIT IMPRIME (INTERRUPTEUR) RAM-70QH4 P.W.B. (FAN) CRICUIT IMPRIME (VENTILATEUR) RAC-80G4X2 FAN MOTOR 50W, 4kg MOTEUR DE VENTILATEUR 50W, 4kg RAC-P28KX2 TERMINAL BOARD (2P)
  • Page 139 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAM-70QH4 UNITÉ RAC-80GW3 CABINET COFFRET RAC68N3X2S PANEL (SIDE) PANNEAU (CÔTÉ) RAC68N3X2S FILTER FILTRE RAC68N3X2S SOUNDPROOF COVER COUVERTURE INSONORISÉE RAM-70QH4 PARTITION CLOISON RAC68N3X2S UPPER PLATE (ELEC. BOX) PLAQUE SUPÉRIEURE (BOÎTE DE ÉLECTRIQUE) RAC68N3X2S ELECTRIC CASE CAS ÉLECTRIQUE...
  • Page 140 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAM-70QH4 UNITÉ RAS-258EX COIL (RCH106-82K) BOBINE (RCH106-82K) RA108CHLXA VARISTOR (450NR) VARISTOR (450NR) RAC-2210MX BUSH (BASE) BUSH (BASE) RAC-2810NX DRAIN PIPE TUYAU DE VIDANGE RAC69N3X2S COMPRESSOR (A) COMPRESSEUR (A) RAC69N3X2S COMPRESSOR (B) COMPRESSEUR (B)
  • Page 141 24(B) 24(A) 925(A) 21(B) 21(A) 416(A) 117(A) 117(B) 925(B) 415(A) 416(B) 900(B) 900(A)
  • Page 142 MODEL RAM-80QH4 MODELE Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAM-80QH4 UNITÉ RAM-80QH4 P.W.B. (MAIN) CIRCUIT IMPRIME (PRINCIPAL) RAM-80QH4 P.W.B. (SWITCH) CIRCUIT IMPRIME (INTERRUPTEUR) RAM-70QH4 P.W.B. (FAN) CIRCUIT IMPRIME (VENTILATEUR) RAC-80G4X2 FAN MOTOR 50W, 4KG MOTEUR DE VENTILATEUR 50W, 4KG RAC-P28KX2 TERMINAL BORD (2P)
  • Page 143 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAM-80QH4 UNITÉ RAC68N3X2S PANEL (SIDE) PANNEAU (CÔTÉ) RAC68N3X2S FILTER FILTRE RAC68N3X2S SOUNDPROOF COVER COUVERTURE INSONORISÉE RAM-70QH4 PARTITION CLOISON RAC68N3X2S UPPER PLATE (ELECTRIC BOX) PLAQUE SUPÉRIEURE (BOÎTE DE ÉLECTRIQUE) RAC68N3X2S ELECTRIC CASE CAS ÉLECTRIQUE...
  • Page 144 Q’TY/ PARTS NO. UNIT Nº DE PIÈCE PARTS NAME DÉSIGNATION QTÉ/ Nº RAM-80QH4 UNITÉ RA108CHLXA VARISTOR (450NR) VARISTOR (450NR) RAC-2210MX BUSH (BASE) BUSH (BASE) RAC-2810NX DRAIN PIPE TUYAU DE VIDANGE RAC68N3X2S COMPRESSOR (A) COMPRESSEUR (A) RAC68N3X2S COMPRESSOR (B) COMPRESSEUR (B) RAC68N3X2S CONDENSER CONDENSEUR...
  • Page 145 Fax: 93 491 3513 Fax: +49- 89-991 80-224 Email: [email protected] Hotline: +49-180-551 25 51 (12ct/min) Email: HSE- [email protected] HITACHI EUROPE srl HITACHI HOME ELECTRONICS (NORDIC) AB Via Tommaso Gulli N.39, 20147 Box 77 S-164 94 Kista Milano, Italia SWEDEN ITALY...

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