Page 1: Table Of Contents
POIDS NET (kg) 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 JUNE 2010 Hitachi Household Appliances(Wuhu) Co., Ltd.
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Page 3 35(&$87,216 5(/$7,9(6 $ /$ 6(&85,7( 3(1'$17 /(6 5(3$5$7,216 $YDQW GH SURFpGHU j XQH UpSDUDWLRQ YHLOOH] j FRXSHU O DOLPHQWDWLRQ pOHFWULTXH /HV SLqFHV GH UHFKDQJH GRLYHQW rWUH GHV SLqFHV G RULJLQH HW OH UHPSODFHPHQW GHV SLqFHV GRLW rWUH UpDOLVp FRQIRUPpPHQW DX[ LQVWUXFWLRQV ILJXUDQW GDQV OH PDQXHO G HQWUHWLHQ 6L YRXV FRQVWDWH] TXH OHV FRQWDFWV G XQ FRPSRVDQW pOHFWULTXH VRQW GpIHFWXHX[ UHPSODFH] OH FRPSRVDQW HW QH WHQWH] SDV...
Page 4 WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned.) 2.
Page 5 PREVENTION DES DOMMAGES AUX SEMI-CONDUCTEURS 1. Champ d'application Pour éviter d'endommager les semi-conducteurs utilisés dans les unités, lors de chaque intervention d'entretien ou de réparation, vous devez observer des précautions spéciales. Les mêmes précautions doivent être prises lors de la manipulation d'organes défectueux qui doivent être retournés en usine. 2.
Page 6 (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 1MΩ(1/2W) Staple Earth wire Fig.3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate...
Page 7 (6) Le fer à souder doit être alimenté par un câble à trois conducteurs (dont un pour la mise à la terre). Surface métallique (aluminium, acier inoxydable, etc.) Fil de cuivre nu (pour mise à la Plan de travail terre du corps) Résistance de 1MΩ...
Page 8 CAUTION 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 9 ATTENTION 1. Dans certaines conditions et pendant un arrêt de fonctionnement, on peut parfois entendre le bruit du réfrigérant circulant dans les canalisations; ce bruit n'a rien d'anormal. 2. Pour des raisons de sécurité, il est conseillé, pendant un orage, d'arrêter le fonctionnement du système en coupant l'alimentation électrique.
Page 10: Specifications
SPECIFICATIONS CARACTERISTIQUES GENERALES RAF-35NX2 RAC-35NX2 MODEL MODÈLE 20W (DC35V) 40W (DC380V) FAN MOTOR MOTEUR DE VENTILATEUR CONDENSATEUR DE MOTEUR FAN MOTOR CAPACITOR DE VENTILATEUR PROTECTION DU MOTEUR FAN MOTOR PROTECTOR DE VENTILATEUR ASC09 2CD-A8J K COMPRESSOR COMPRESSEUR PROTECTION CONTRE LES...
Page 11: Safety Precaution
+2: 72 86( 02'(/ 5$) 1; 5$& PRECAUTIONS DURING OPERATION SAFETY PRECAUTION % The product shall be operated under the manufacturer specification and not for any other intended use. % Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. PROHIBITION % Pay special attention to signs of “...
Page 12 MODEL NAME AND DIMENSIONS MODEL WIDTH HEIGHT DEPTH HOW TO OPEN OR CLOSE THE FRONT PANEL RAF-25NX2 RAF-35NX2 Top left and right corners 760mm 600mm 235mm RAF-50NX2 Open the front panel (INDOOR UNIT) 1. To open the front panel, use the remote controller to stop unit operation.
Page 13 VARIOUS FUNCTIONS NAMES AND FUNCTIONS OF EACH PART ■ Auto Restart Control REMOTE CONTROLLER • This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is controlled • If there is a power failure, operation will be automatically restarted when the power is resumed with electronically, the range of control may be shorter, in some cases, the control signal may not be received.
Page 14 HEATING OPERATION DEHUMIDIFYING OPERATION Use the device for dehumidifying when the room temperature is over 16°C. • Use the device for heating when the outdoor temperature is under 21°C. When it is under 15°C, the dehumidifying function will not work. When it is too warm (over 21°C), the heating function may not work in order to protect the device.
Page 15 COOLING OPERATION FAN OPERATION Use the device for cooling when the outdoor temperature is –10 to 42°C. You can use the device simply as an air circulator. Use this function to dry the interior of the indoor unit If humidity is very high (over 80%) indoors, some dew may form on the air outlet grille of the indoor unit. at the end of summer.
Page 16 HOW TO SET THE TIMER Time Set the (TIME) button. Set the current time with Press the (TIME) button • The time indication will disappear automatically in 10 the TIMER control button. again. The time indication starts TIME seconds. After you change the (current time) lighting instead of flashing.
Page 17 HOW TO SET THE SLEEP TIMER ADJUSTING THE AIR DEFLECTORS Set the current time at first if it is not set before (see the pages for setting the current time). Adjustment of the conditioned air in the upward Press the (SLEEP) button and the display changes as shown below.
Page 18: How To Use
HOW TO CHANGE THE BATTERIES IN THE REMOTE CONTROLLER MAINTENANCE Remove the cover as shown in the figure and remove the WARNING old batteries. • Before cleaning, stop unit operation with the remote controller and turn off the circuit breaker. CAUTION Install the new batteries.
Page 19 2. HOW TO INSTALL AND REMOVE THE FRONT PANEL 5. AIR CLEANSING FILTERS (SPX-CFH15) • Be sure to use both hands to grasp the front panel when removing it or attaching it. • When installing the air cleansing filters, remove the air filters and attach Air cleansing filters them onto the hooks of the front cover frame.
Page 20 INFORMATION REGULAR INSPECTION PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT YOUR CAPABILITIES SALES AGENT SHOULD YOU NEED ANY HELP. Heating Capability Check to see if the unit’s earth line has been connected • This room air conditioner utilizes a heat pump system that absorbs CAUTION correctly.
Page 21 Steam emitted from the outdoor unit Water generated during defrosting operation evaporates and steam is emitted. Caused as the smells and particles of smoke, food, cosmetics, etc. present in room Odors air become attached the unit and blown off into the room again. Defrosting is underway (as the heating operation is stopped, the microcomputer The outdoor unit continues to operate checks frost accumulated in the indoor unit and instructs the unit to perform...
Page 22 87,/,6$7,21 02'e/( 5$) 1; 5$& PRÉCAUTIONS À PRENDRE LORS DE L’UTILISATION DE VOTRE APPAREIL PRÉCAUTIONS À SUIVRE % L’appareil doit être utilisé conformément aux spécifications du fabricant et non pas à des fins de celles qui y sont spécifiées. INTERDICTION DE •...
Page 23 MODÈLE LARGEUR HAUTEUR PROFONDEUR RAF-25NX2 COMMENT OUVRIR ET REFERMER LE PANNEAU FRONTAL RAF-35NX2 760mm 600mm 235mm RAF-50NX2 (APPAREIL INTÉRIEUR) Comment ouvrir le panneau frontal Angles supérieurs gauche et droit 1. Pour ouvrir le panneau frontal, arrêter le fonctionnement de l’unité...
Page 24: Fonctionnement Automatique
DÉSIGNATION DES ÉLÉMENTS CONSTITUTIFS ET FONCTIONS FONCTIONS DIVERSES ■ Remise à zéro automatique des commandes BOÎTIER DE TÉLÉCOMMANDE • Il permet de commander l’appareil intérieur. La limite de distance est d’environ 7 métres. Si l’éclairage intérieur du domicile est placé sous gestion électronique, il se peut que la portée utile des signaux de télécommande •...
Page 25 FONCTIONNEMENT EN DÉSHUMIDIFICATION FONCTIONNEMENT EN MODE DE CHAUFFAGE • L’appareil peut être commuté en mode de fonctionnement de mode chauffage quand la température L’appareil peut être utilisé pour commander une déshumidification quand la température intérieure de la extérieure est inférieure à 21°C. pièce est supérieure à...
Page 26 FONCTIONNEMENT EN MODE DE RÉFRIGÉRATION FONCTIONNEMENT DE VENTILATEUR Il est également possible de se servir de l’appareil comme d’un simple appareil de circulation d’air. L’appareil peut être utilisé en mode de réfrigération quand la température extérieure se situe entre –10 à Choisir cette fonction pour assécher l’air intérieur de l’appareil intérieur quand l’été...
Page 27 PROCÉDÉ DE RÉGLAGE DE LA MINUTERIE Introduire l’heure avec la Appuyer encore une fois sur • L’indication horaire disparaît automatiquement dans Heure Appuyer sur la touche (HEURE). la 10 seconde qui suit. touche de réglage de HEURE la touche (HEURE). Introduire MINUTERIE.
Page 28 COMMENT RÉGLER LA MINUTERIE DE TEMPORISATION AJUSTEZ LE VOLET D’AIR Ajustement de l’air climatisé vers le haut et vers le Mettre tout d’abord l’horloge à l’heure car son réglage sert de référence par la suite (se reporter aux pages bas. pour obtenir de plus amples détails sur la façon de mettre l’horloge à...
Page 29 COMMENT REMPLACER LES PILES DU BOÎTIER DE TÉLÉCOMMANDE ENTRETIEN Retirer le couvercle en procédant de la façon représentée AVERTISSEMENT sur l’illustration ci-contre et retirer les piles usées. Appuyer sur le • Arrêter l’appareil à l’aide de la télécommande et mettre l’interrupteur sur OFF avant de la nettoyer. couvercle et le faire coulisser ATTENTION...
Page 30 2. COMMENT INSTALLER ET ENLEVER LE PANNEAU AVANT 5. FILTRES PURIFICATEUR D’AIR (SPX-CFH15) • Assurez-vous d’utiliser vos deux mains pour empoigner le panneau avant quand vous l’enlevez ou que vous le fixez. • Pour installer les filtres purificateur d’air, enlever les filtres à air et les fixer aux crochets devant le tableau du panneau avant.
Page 31 INFORMATIONS INSPECTION RÉGULIÈRE VEUILLEZ VÉRIFIER LES POINTS SUIVANTS TOUS LES SIX MOIS OU TOUS LES ANS. CONTACTEZ CAPACITÉ VOTRE VENDEUR SI VOUS AVEZ BESOIN D’AIDE. Vérifier si l’unité est branchée correctement à la terre. Capacité de chauffage Si le conducteur de terre est débranché ou défectueux, l’appareil •...
Page 32 Vapeur émise par l’appareil extérieur Eau qui s’évapore durant l’opération de décongélation. Elles sont dues aux odeurs et aux particules de fumée, d’aliments, de cosmétiques, etc. dans l’air de la pièce. Celles-ci sont captées par l’unité et soufflées de nouveau Odeurs dans la pièce.
Page 33: Construction And Dimensional Diagram
CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAF-35NX2 Unit : mm Wireless remote 65 Standard underfloor piping position controller Cabinet Front panel Air outlet Infrared receiver Small dia. pipe ( 6.35) Large dia. pipe ( 9.52) Piping hole Piping hole Air inlet...
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Page 35 MODEL RAC-35NX2 OUTDOOR UNIT Unit : mm 19.5 27.5 Handle Air outlet Air suction Handle Rear side Air suction Holed for anchor bolt (2- 12 16 slots for 8.0 bolt) Notch for anchor bolt (for 2- 8.0 bolt) Fixing hole Drain hole Drain hole Service space...
Page 36 MODEL RAC-35NX2 OUTDOOR UNIT Unit : mm 19.5 27.5 3RLJQpH 3RLJQpH $VSLUDWLRQ G DLU 6RUWLH GH O DLU $VSLUDWLRQ G DLU $VSLUDWLRQ G DLU /RQJV WURXV SRXU YHUURX GH O DQFUH [ /RQJV WURXV ERXORQV (QFRFKH SRXU OHV ERXORQV G DQFUDJH ERXORQV PP (VSDFH UHTXLV SRXU HQWUHWLHQ...
Page 37: Main Parts Component
MAIN PARTS COMPONENT PRINCIPAUX COMPOSANTS THERMOSTAT THERMOSTAT Thermostat Specifications Caractéristiques du thermostat MODEL MODÈLE RAF-35NX2 THERMOSTAT MODEL MODÈLE DE THERMOSTAT C.I. OPERATION MODE MODE DE FONCTIONNEMENT COOL RÉFRIGÉRATION HEAT CHALEUR INDICATION ON MARCHE 16.7 (62.1) 18.7 (65.7) INDICATION OFF ARRET 16.0...
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Page 39 :,5,1* ',$*5$0 02'(/ RAF-35NX2/ RAC-35NX2 OUTDOOR UNIT ,1'225 81,7 & %51 %51 7(67 +($7 5(' 5(' (;&+$1*(5 *5< &1 7+(50,6725 &1 *5< &1 5220 &1 $872 6:((3 7(03($785( 5('...
Page 40: Schéma Électrique
SCHÉMA ÉLECTRIQUE MODÈLE RAF-35NX2 / RAC-35NX2 UNITÉ INTÉRIEURE CORDEN DE CONNEXION (BRN) (BRN) TEST (RED) (RED) THERMISTANCE 1 2 3 4 5 6 7 8 9 10 1112 BORNIER DE D'ÉCHANGEUR RACCORDEMENT DE CHALEUR MOTEUR 1 DE THERMISTANCE BALAYAGE (RED) DE TEMPÉRATURE...
Page 41: Wiring Diagram Of The Printed Wiring Board
WIRING DIAGRAM OF THE PRINTED WIRING BOARD SCHÉMA ÉLECTRIQUE DU CIRCUIT IMPRIMÉ [Remote controller] RAR-3U1 [Télécommande] RAR-3U1 1/8W 1/8W 1/8W 1/8W SEG7 SEG6 SEG8 SEG5 SEG9 SEG4 SEG10 SEG3 INPUT SEG11 SEG2 ENTRÈE SEG12 SEG1 SEG13 LCD1 SEG0 SEG14 COM3 SEG15 COM2 SEG16...
Page 42 MODEL RAF-3 5NX2 − − …… − − …… …… − − − − − − − − − − − − − − − − − − − − − − − − φ φ − − − − Light receving unit ’...
Page 43 MODÈLE RAF- 5NX2 − − …… − − …… …… − − − − − − − − − − − − − − − − − − − − − − − ION CEGATIF φ φ − − − −...
Page 44 MODEL RAC- 3 5NX2 P Q 1 P Q 2 P Q 4 0 1 P Q 4 0 2 P Q 4 0 3 P Q 4 0 4 P Q 7 0 1 SELF-CHECK SELF-MODE SERVICE SW AX-8T11 –...
Page 45 02'Ë/( RAC- 3 5NX2 P Q 1 P Q 2 P Q 4 0 1 P Q 4 0 2 P Q 4 0 3 P Q 4 0 4 P Q 7 0 1 SELF-CHECK SELF-MODE SERVICE SW AX-8T11 –...
Page 46: Block Diagram
BLOCK DIAGRAM MODEL RAF-35NX2 / RAC-35NX2 OUTDOOR UNIT Outdoor DC fan motor INDOOR UNIT Power source 1ø 50Hz 220-230V HARMONICS POWER POWER RELAY IMPROVEMENT SWITCH RECTIFIER CIRCUIT Inrush current DC compressor Protection circuit motor Rotor magnetic pole position detection circuit...
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Page 48: Basic Mode
BASIC MODE MODEL RAF-3 5NX2 Operation mode Cooling Dehumidifying Heating Auto Start Stop Start Stop Basic operation of Start / stop switch start / stop switch Operation lamp Start / stop switch Reserve switch Cancel switch Operation lamp Off-timer Timer lamp Timer memory (Off-timer during stop) (Change in reserved time)
Page 49 BASIC MODE MODEL RAF-35NX2 - 48 -...
Page 50 Table 1 Fan speed by mode Mode data file REQUIRED VALUE LABEL NAME Operation OF UNIT SIDE Fan speed mode Label name mode 6000 min WMAX Ultra Lo FWSS 6000 min WMAX 2 Silent, Sleep FWSOY 5100 min WSTD 4000 min WJKMAX Overload FWKAF...
Page 51 Tableau 1 Vitesse de ventilation par mode Fichier de données de mode Indicatif de Valeur requise de l'unité label Mode d'opération Vitesse de ventilation Indicatif de label 6000 min WMAX Ultra Lo FWSS 6000 min WMAX 2 Silent, Sleep FWSOY 5100 min WSTD 4000 min...
Page 52 Table 3 Condensation Condition Criterion Value Basic Cooling Operation Item Temperature Room Condensation 30˚C temperature condition (engaged) Condensation CLMXTP 32˚C condition (released) Outdoor Condensation Room temperature 32˚C temperature condition (engaged) Temperature set for cooling and Condensation 33˚C dehumidifying (value set by remote condition (released) control: (+) SHIFTC) Dash period...
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Page 54 Cooling Sleep Operation Cooling Defrost Indoor heat exchange temperature 0.5hr T E I O F Set to 7 hours Sleep key T E I O N Operation lamp Timer lamp Cooling defrost signal See basic operation Indoor fan See basic operation Silent Sleep Indoor fan 15sec.
Page 55 Veille du mode de réfrigération Dégivrage en mode "FROID" Température d'échange de chaleur intérieur 0,5hr T E I O F Réglé à 7 heures Touche de veille T E I O N Témoin de fonctionnement Signal de dégivrage en Témoin de programmateur mode de réfrigération Voir fonctionnement de base Ventilateur...
Page 56 Dehumidifying Dehumidifying Sleep Operation Room temperature judgement 0.5 h r 1 h r 2 h r Room temperature Set to 2 hours Sleep key Dehumidifying Operation lamp preset [SLEEP] on the remote temperature controller is lit Timer lamp Indoor fan See basic operation Silent Fan speed set to "Lo"...
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Page 60 Reversing Valve Defrosting Heating Sleep Operation 0.5hr 6.5hr Set to 7 hours Sleep key Operation lamp [SLEEP] on the remote controller is lit Timer lamp Indoor fan Silent See basic Sleep operation See basic operation Outdoor fan TDF 431 Facing up Vertical air 413 TDF421 1 min...
Page 61 Dégivrage avec vanne d'inversion Fonctionnement en Veille chauffage Rafraîchissement automatique 15sec. ou plus du dégivrage Période d'inhibition du dégivrage 30sec. 30sec. 0,5hr 6,5hr Vitesse du Règlèe sur 7 heures Règlè sur 7 heures ventilateur Arrêt Interrupteur marche / arrêt Touche de Veille réglée sur "Hi"...
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Page 65 PROCEDURE D'ASSEMBLAGE ET DESASSEMBLAGE 1. FILTRE A AIR Il faut nettoyer le filtre, car il aspire la poussière de la pièce. Veiller à nettoyer le filtre toutes les deux semaines, pour éviter une consommation excessive d’électricité. PROCÉDURE Comment ouvrir le panneau frontal. •...
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Page 76 2. Reset Circuit NORMAL : HI RESET : LO Microcomputer R552 IC521 Fig. 2-1 Power "OFF" Power "ON" Voltage 5.0V Voltage supply to pin 2 of IC521 Reset enter at 4.2V Reset release at 4.4V Voltage 5.0V Voltage at pin 7 of microcomputer Fig.
Page 77 2. Reset Circuit NORMAL : HI RESET : LO Microcomputer R552 IC521 Fig. 2-1 Power "OFF" Power "ON" Voltage 5.0V Voltage supply to pin 2 of IC521 Reset enter at 4.2V Reset release at 4.4V Voltage 5.0V Voltage at pin 7 of microcomputer Fig.
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Page 84 MODEL RAC-35NX2 1. The electrical parts for the outdoor unit is composed of two P.W.B. (a power P.W.B. and main P.W.B.) and a harmonics improvement circuit as shown in Fig. 1-1. • MAIN P.W.B. This P.W.B. is equipped with the rectification diode, DC fan motor control circuit and the circuits around the micro computer which take various controls.
Page 85 MODEL RAC-35NX2 1. The electrical parts for the outdoor unit is composed of two P.W.B. (a power P.W.B. and main P.W.B.) and a harmonics improvement circuit as shown in Fig. 1-1. • MAIN P.W.B. This P.W.B. is equipped with the rectification diode, DC fan motor control circuit and the circuits around the micro computer which take various controls.
Page 86 2. Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage And produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000-3-2. When the compressor is stopped, the AC voltage becomes about 300 V and while the compressor operates, it is about 280 V.
Page 87 2. Power circuit This circuit is to convert the power from AC which is provided from the terminal A and B to DC voltage And produces an AC current which does not exceed the harmonic amplitude limit of the IEC61000-3-2. When the compressor is stopped, the AC voltage becomes about 300 V and while the compressor operates, it is about 280 V.
Page 88 (3) C021 and C022 This smoothes the voltage rectified for operating the compressor. When the input voltage is taken for the sine wave as shown in the top of Fig. 2-4, it is rectified by the DB2 and becomes the waveform as shown in the middle of Fig.
Page 89 (3) C021 and C022 This smoothes the voltage rectified for operating the compressor. When the input voltage is taken for the sine wave as shown in the top of Fig. 2-4, it is rectified by the DB2 and becomes the waveform as shown in the middle of Fig.
Page 90 3. Indoor/Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units. This circuit consists of a transmitting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line.
Page 91 3. Indoor/Outdoor Interface Circuit The interface circuit superimposes an interface signal on the DC 35V line to perform communications between indoor and outdoor units. This circuit consists of a transmitting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a circuit which detects the interface signal on the DC 35V line.
Page 92 Fig. 3-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. Control P.W.B. Fig. 3-1 - 91 -...
Page 93 Fig. 3-1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other. Control P.W.B. Fig. 3-1 - 92 -...
Page 94 Outdoor microcomputer Pin 11 Pin 68 Indoor microcomputer Pin 50 Pin 49 35V DC line 33ms. 100ms. 1 frame Leader Fig. 3-2 Voltages Waveforms of Indoor / Outdoor Microcomputers (Outdoor to Indoor Communications) Outdoor microcomputer Pin 11 Pin 68 Indoor microcomputer Pin 50 Pin 49 35V DC line 4.95ms.
Page 95 Outdoor microcomputer Pin 11 Pin 68 Indoor microcomputer Pin 50 Pin 49 35V DC line 33ms. 100ms. 1 frame Leader Fig. 3-2 Voltages Waveforms of Indoor / Outdoor Microcomputers (Outdoor to Indoor Communications) Outdoor microcomputer Pin 11 Pin 68 Indoor microcomputer Pin 50 Pin 49 35V DC line 4.95ms.
Page 96 Serial Communications Format during Normal Communications (1)Outdoor microcomputer (HIC) to indoor microcomputer Outdoor message Character No. When reset Leader Leader (approx.100ms.) 100ms. 100ms. (33.3ms.) (33.3ms.) (33.3ms.) (33.3ms.) Bit No.=0 (2)Indoor microcomputer to outdoor microcomputer (HIC) Indoor message Transmit/ receive When reset switching time (approx.10ms.) (4.95ms.)
Page 97 Serial Communications Format during Normal Communications (1)Outdoor microcomputer (HIC) to indoor microcomputer Outdoor message Character No. When reset Leader Leader (approx.100ms.) 100ms. 100ms. (33.3ms.) (33.3ms.) (33.3ms.) (33.3ms.) Bit No.=0 (2)Indoor microcomputer to outdoor microcomputer (HIC) Indoor message Transmit/ receive When reset switching time (approx.10ms.) (4.95ms.)
Page 98 Serial Communications Data (1)Outdoor message Character No. Bit No. Contents Data (2)Indoor message Character No. Bit No. Contents Data 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0...
Page 99 Serial Communications Data (1)Outdoor message Character No. Bit No. Contents Data (2)Indoor message Character No. Bit No. Contents Data 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0...
Page 100 4. IPM (Intelligent Power Module) • Fig.4-1 shows the intelligent power module and its peripheral circuit. The three transistors on the positive e side are called the upper arm, and the three transistors on the negative d side, the lower arm. Fig.
Page 101 4. IPM (Intelligent Power Module) • Fig.4-1 shows the intelligent power module and its peripheral circuit. The three transistors on the positive e side are called the upper arm, and the three transistors on the negative d side, the lower arm. Fig.
Page 102 Intelligent power module switches power supply current according to position of the compressor motor rotor. The switching order is as shown in Fig. 4-2. – At point E : U is ON, V is ON (circuit in Fig. 4-1) – At point F : U is chopped (OFF), V is ON (circuit in Fig.
Page 103 Intelligent power module switches power supply current according to position of the compressor motor rotor. The switching order is as shown in Fig. 4-2. – At point E : U is ON, V is ON (circuit in Fig. 4-1) – At point F : U is chopped (OFF), V is ON (circuit in Fig.
Page 104 – Fig. 4-4 Power module circuit (U is OFF, V is ON) – Since current flows at point B only when U transistor and V transistor is ON, the current waveform at point B becomes intermittent waveform as shown in Fig.4-3. Since current at point B is approximately proportional to the input current of the air conditioner, input current is controlled by using DC current (Id) detection resistor.
Page 105 – Fig. 4-4 Power module circuit (U is OFF, V is ON) – Since current flows at point B only when U transistor and V transistor is ON, the current waveform at point B becomes intermittent waveform as shown in Fig.4-3. Since current at point B is approximately proportional to the input current of the air conditioner, input current is controlled by using DC current (Id) detection resistor.
Page 106 • IPM drive circuit The inverter driving device (IGBT) and the drive circuit are built in the IPM. The IPM receives the signal from the microcomputer and convert it to 0 – 15 V signal to drive the IGBT. When the unit operates at low speed, a chopper signal is emitted from the micro computer as shown in Fig.
Page 107 • IPM drive circuit The inverter driving device (IGBT) and the drive circuit are built in the IPM. The IPM receives the signal from the microcomputer and convert it to 0 – 15 V signal to drive the IGBT. When the unit operates at low speed, a chopper signal is emitted from the micro computer as shown in Fig.
Page 108 5. Power Circuit for P.W.B. • Fig. 5-1 shows the power circuit for P.W.B. AC220-230V Fig 5-1 • In the power circuit for P.W.B., power supply for microcomputer, peripheral circuits, and IPM driver circuit and, as well as DC 35V, are produced by switching power circuit. •...
Page 109 5. Power Circuit for P.W.B. • Fig. 5-1 shows the power circuit for P.W.B. AC220-230V Fig 5-1 • In the power circuit for P.W.B., power supply for microcomputer, peripheral circuits, and IPM driver circuit and, as well as DC 35V, are produced by switching power circuit. •...
Page 110 • The voltage specification of the power circuit is as follows. <Check points> Output Voltage Main load Measuring points Potential failure modes spec. – 11-13V MAIN P.W.B. (CN3, CN4) R701 (“12V” display) R006 (“0V” display) The unit won’t operate C21 (“12V” display) J27, J30 MAIN P.W.B.
Page 111 • The voltage specification of the power circuit is as follows. <Check points> Output Voltage Main load Measuring points Potential failure modes spec. – 11-13V MAIN P.W.B. (CN3, CN4) R701 (“12V” display) R006 (“0V” display) The unit won’t operate C21 (“12V” display) J27, J30 MAIN P.W.B.
Page 112 6. Microcpomputer's Peripheral Circuits 6-1. Overload control circuit (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 113 6. Microcpomputer's Peripheral Circuits 6-1. Overload control circuit (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 114 Detection DC Current Resistor Direct Current R003 R004 Q501 R513 Power P.W.B. R514 R906 R613 Microcomputer R612 R248 R245 R222 CN4B CN4A C009 R005 D001 R287 D208 Reset output Reset R288 R252 0V 0V 0V Main P.W.B. Fig. 6-2 (1) IS OVL The voltage amp.
Page 115 Detection DC Current Resistor Direct Current R003 R004 Q501 R513 Power P.W.B. R514 R906 R613 Microcomputer R612 R248 R245 R222 CN4B CN4A C009 R005 D001 R287 D208 Reset output Reset R288 R252 0V 0V 0V Main P.W.B. Fig. 6-2 (1) IS OVL The voltage amp.
Page 116 R003,R004,R608,R613, detect the DC voltage at the power circuit. The microcomputer receives a DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high. (Since the load level is indicated by the DC voltage multiplied by DC current, R247, R248, R249 are provided to perform the same overload judgement even when the voltage varies.) DC voltage : Low DC current : High...
Page 117 R003,R004,R608,R613, detect the DC voltage at the power circuit. The microcomputer receives a DC voltage and applies correction to the overload set value so the DC current will be low when the DC voltage is high. (Since the load level is indicated by the DC voltage multiplied by DC current, R247, R248, R249 are provided to perform the same overload judgement even when the voltage varies.) DC voltage : Low DC current : High...
Page 118 6-2. Reset Circuit MAIN P.W.B. D208 R287 Microcomputer RESET OUT. R252 RESET C204 IC5(1/2) R288 0V 0V 0V 0V Fig. 6-7 The reset circuit initializes the microcomputer program when Power is “ON” from “OFF”. Low voltage at pin 48 resets the microcomputer , and HI activates the microcomputer. Fig.
Page 119 6-2. Reset Circuit MAIN P.W.B. D208 R287 Microcomputer RESET OUT. R252 RESET C204 IC5(1/2) R288 0V 0V 0V 0V Fig. 6-7 The reset circuit initializes the microcomputer program when Power is “ON” from “OFF”. Low voltage at pin 48 resets the microcomputer , and HI activates the microcomputer. Fig.
Page 120 7. Temperature Detection Circuit MAIN P.W.B. O.H. thermistor R304 C304 R301 DEF. thermistor Microcomputer R305 C303 R302 Outdoor temperature thermistor CN10 R306 Outdoor temperature C302 R303 Fig. 7-1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head, the Defrost. thermistor circuit detects the defrosting operation temperature.
Page 121 7. Temperature Detection Circuit MAIN P.W.B. O.H. thermistor R304 C304 R301 DEF. thermistor Microcomputer R305 C303 R302 Outdoor temperature thermistor CN10 R306 Outdoor temperature C302 R303 Fig. 7-1 The Over heat thermistor circuit detects the temperature at the surface of the compressor head, the Defrost. thermistor circuit detects the defrosting operation temperature.
Page 122 8. Reversing valve control circuit C-35V Power P.W.B. MAIN P.W.B. Reversing valve R701 D701 PQ701 Microcomputer CN4A CN4B Q701 R705 DC voltmeter R706 or multimeter D-0V Fig. 8-1 Reversing valve control circuit will switch reversing valve ON/OFF(cooling ON) according to instruction from indoor microcomputer depending on the operation condition shows in Table 8-1.
Page 123 8. Reversing valve control circuit C-35V Power P.W.B. MAIN P.W.B. Reversing valve R701 D701 PQ701 Microcomputer CN4A CN4B Q701 R705 DC voltmeter R706 or multimeter D-0V Fig. 8-1 Reversing valve control circuit will switch reversing valve ON/OFF(cooling ON) according to instruction from indoor microcomputer depending on the operation condition shows in Table 8-1.
Page 124 9. Electric expansion valve control circuit POWER P.W.B. MAIN P.W.B. B-12V B-12V CN15 B-12V R403 R404 R401 Microcomputer PQ401 R293 Valve4 PQ402 R294 Valve3 Electric PQ403 R295 Valve2 expansion valve PQ404 R296 Valve1 CN4B CN4A 12 13 C401 B-0V Fig. 9-1 •...
Page 125 9. Electric expansion valve control circuit POWER P.W.B. MAIN P.W.B. B-12V B-12V CN15 B-12V R403 R404 R401 Microcomputer PQ401 R293 Valve4 PQ402 R294 Valve3 Electric PQ403 R295 Valve2 expansion valve PQ404 R296 Valve1 CN4B CN4A 12 13 C401 B-0V Fig. 9-1 •...
Page 126 10. Outdoor DC Fan Motor control circuit This model uses DC Fan Motor which has a controller circuit built in the Motor. This DC Fan Motor will rotate by control voltage apply to Vsp input. (Voltage range: 1.7 to 7V DC) Vsp high : Faster ;...
Page 127 10. Outdoor DC Fan Motor control circuit This model uses DC Fan Motor which has a controller circuit built in the Motor. This DC Fan Motor will rotate by control voltage apply to Vsp input. (Voltage range: 1.7 to 7V DC) Vsp high : Faster ;...
Page 128 < Reference > When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor. In this case, please check CN6 and CN12 connection first. It makes Fan Motor Lock also if those connectors are in misconnection. DC Fan Motor has broken invites 1A Fuse burned.
Page 129 < Reference > When operation stop with LD301 blinks 12 times, it may be caused by faulty DC fan motor. In this case, please check CN6 and CN12 connection first. It makes Fan Motor Lock also if those connectors are in misconnection. DC Fan Motor has broken invites 1A Fuse burned.
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Page 140 DISCHARGE, PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT WARNING Caution • Voltage of about 350 V is charged between the terminal of smoothing capacitors (400μF x 2). • During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
Page 141 DISCHARGE, PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT WARNING Caution • Voltage of about 350 V is charged between the terminal of smoothing capacitors (400μF x 2). • During continuity check for each circuit part of the outdoor unit, be sure to discharge the smoothing capacitors.
Page 142 - 141-...
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Page 145 DEPANNAGE QUAND LA LAMPE DE PROGRAMMATEUR CLIGNOTE MODÈLE RAF-35NX2 Voir le tableau ci-dessous quand la lampe de programmateur clignote sur la section d'affichage de l'unité intérieure. Mode clignotement de lampe Défaillance principale 2 sec. Une fois Vanne d'inversion défectueuse 2 sec.
Page 146 SELF-DIAGNOSIS LIGHTING MODE MODEL RAC-35NX2 INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 SERVICE SWITCH LD303 - 145 -...
Page 147 MODE D'ECLAIRAGE DU VOYANT D'AUTO-DIAGNOSTIC MODEL RAC-35NX2 INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 SERVICE SWITCH LD303 - 146 -...
Page 148: Checking The Refrigerating Cycle
(JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times 8times...
Page 149 (JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE) 1. Troubleshooting procedure (No operation, No heating, No cooling) Lighting mode Blinks Blinks Blinks Blinks Blinks Blinks Connect U,V,W phase leads to the Self- 2 times 3 times 4 times 5 times 6 times 8times...
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Page 152 OUTDOOR UNIT Remove the compressor connector. INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 LD303 SERVICE SWITCH • Check the drive If your first attempt With the unit set in the operating circuit (IMP) using fails, wait 3 minutes state, press the start/stop the PRD checker.
Page 153 OUTDOOR UNIT Remove the compressor connector. INTELLIGENT POWER MODULE LD301 SELF DIAGNOSIS LAMPS LD302 LD303 SERVICE SWITCH • Check the drive If your first attempt With the unit set in the operating circuit (IMP) using fails, wait 3 minutes state, press the start/stop the PRD checker.
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Page 158 5. Check the control P.W.B. (power circuit) Is 35V or 20V being output Check to see if the connection cables are at pin 5 relative to 0V at disconnected or reversed. pin 3 of CN3? If normal, check the outdoor unit P.W.B. Is 12V or 7V being output Is ICP1 normal? at (+) relative to 0V at (-) of...
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Page 162 CHECKING OUTDOOR UNIT ELECTRICAL PARTS [No operation or abnormal operation] Is AC220-230V being generated at terminals L and N? If the 15A fuse has blown, be aware that other parts may also be defective. Is the 15A fuse normal? Replace defective parts. mainly, varistor (VS2), 3A fuse, smoothing capacitors, IPM, etc.
Page 163 CHECKING OUTDOOR UNIT ELECTRICAL PARTS [No operation or abnormal operation] Is AC220-230V being generated at terminals L and N? If the 15A fuse has blown, be aware that other parts may also be defective. Is the 15A fuse normal? Replace defective parts. mainly, varistor (VS2), 3A fuse, smoothing capacitors, IPM, etc.
Page 164 LD301 blinks 12 times. Connect the connector. Is CN24 connected? Fan lock error. Is the propeller fan Remove any locked? obstructions. Have the 1A fuse and Replace the fan motor R107 blown? and main P.W.B. Is +15V being generated? Check voltage both between CN18 4 and 5 on the main P.W.B., and between +15V and 15-0V (silk-screened) on...
Page 165 LD301 blinks 12 times. Connect the connector. Is CN24 connected? Fan lock error. Is the propeller fan Remove any locked? obstructions. Have the 1A fuse and Replace the fan motor R107 blown? and main P.W.B. Is +15V being generated? Check voltage both between CN18 4 and 5 on the main P.W.B., and between +15V and 15-0V (silk-screened) on...
Page 166 Is AC220-230V being output LD 301 blinks 10 times. Apply AC220-230V at terminals A and B on Defective power supply Check the interior wiring. the terminal board? voltage Are TAB 1, TAB 2, TAB 3, TAB 4, TAB 5, TAB 6, Connect properly.
Page 167 Is AC220-230V being output LD 301 blinks 10 times. Apply AC220-230V at terminals A and B on Defective power supply Check the interior wiring. the terminal board? voltage Are TAB 1, TAB 2, TAB 3, TAB 4, TAB 5, TAB 6, Connect properly.
Page 168 Is the connecting cable LD301 blinks 9 times. connected properly? Connect properly. (Is 35V being output on the Communication error. indoor unit side?) Are CN3 and CN4 Connect CN 3 and CN4. connected? Is DC35V being output between terminals C and D? Replace the power P.W.B.
Page 169 Is the connecting cable LD301 blinks 9 times. connected properly? Connect properly. (Is 35V being output on the Communication error. indoor unit side?) Are CN3 and CN4 Connect CN 3 and CN4. connected? Is DC35V being output between terminals C and D? Replace the power P.W.B.
Page 170 Is the thermistor connector LD301 blinks 7 times. disconnected? Connect the thermistor. The problem may be Thermistor abnormal. “forgetting to connect after servicing”. Is the continuity of the Replace the thermistor. thermistor normal? Check continuity of pattern Replace parts in the Is the thermistor circuit and lead wires according to thermistor circuit.
Page 171 Is the thermistor connector LD301 blinks 7 times. disconnected? Connect the thermistor. The problem may be Thermistor abnormal. “forgetting to connect after servicing”. Is the continuity of the Replace the thermistor. thermistor normal? Check continuity of pattern Replace parts in the Is the thermistor circuit and lead wires according to thermistor circuit.
Page 172 LD301 blinks 6 times. Is the thermistor circuit Replace parts in the The temperature at the normal? thermistor circuit. OH thermistor rises. LD301 blinks 5 times. Replace the main P.W.B. Overload lower limit cut. Check to see if the refrigerating cycle is defective. Check the indoor unit for clogged heat exchanger or filter.
Page 173 LD301 blinks 6 times. Is the thermistor circuit Replace parts in the The temperature at the normal? thermistor circuit. OH thermistor rises. LD301 blinks 5 times. Replace the main P.W.B. Overload lower limit cut. Check to see if the refrigerating cycle is defective. Check the indoor unit for clogged heat exchanger or filter.
Page 174 LD301 blinks 2 times. Is the intelligent power Replace the intelligent power module (IPM) normal? Peak current-cut. module (the main P.W.B.). Is the reset circuit normal? LD301 blinks 1 time. Replace the main P.W.B. Normally, pin 7 of Reset stop. CN18 is approx.
Page 175 LD301 blinks 2 times. Is the intelligent power Replace the intelligent power module (IPM) normal? Peak current-cut. module (the main P.W.B.). Is the reset circuit normal? LD301 blinks 1 time. Replace the main P.W.B. Normally, pin 7 of Reset stop. CN18 is approx.
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Page 178: Checking The Remote Controller
CHECKING THE REMOTE CONTROLLER Is battery polarity correct? Install the battery in the correct polarity. Is the battery check sign + – Replace the battery. flashing? Turn on an AM radio, bring the remote control switch within 15 cm of the radio, and press the ON/OFF button.
Page 179 CHECKING THE REMOTE CONTROLLER Is battery polarity correct? Install the battery in the correct polarity. Is the battery check sign + – Replace the battery. flashing? Turn on an AM radio, bring the remote control switch within 15 cm of the radio, and press the ON/OFF button.
Page 180 WARNING PRECAUTIONS FOR SERVICING Be sure that the power switch is turned off or the power cable is disconnected before servicing. Removing the P.W.B.s. System Configuration of Outdoor Unit Electrical Parts. The outdoor unit electrical parts consist of two P.W.B.s as shown in the figure. <Main P.W.B.
Page 181 WARNING PRECAUTIONS FOR SERVICING Be sure that the power switch is turned off or the power cable is disconnected before servicing. Removing the P.W.B.s. System Configuration of Outdoor Unit Electrical Parts. The outdoor unit electrical parts consist of two P.W.B.s as shown in the figure. <Main P.W.B.
Page 182 [C. Power Factor Improvement capacitor] Designed to improve power factor. To replace the capacitor, remove the power P.W.B. and then: 1. Remove two screws fastening the capacitor seat. 2. Slide the capacitor seat in the direction of the arrow. Sliding Direction - 181 -...
Page 183 [C. Power Factor Improvement capacitor] Designed to improve power factor. To replace the capacitor, remove the power P.W.B. and then: 1. Remove two screws fastening the capacitor seat. 2. Slide the capacitor seat in the direction of the arrow. Sliding Direction - 182 -...
Page 184: How To Operate The Outdoor Unit Independently
HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC-E14H2 1. Turn off the power switch. 2. Remove the electrical box cover. 3. Turn on the power switch 4. After waiting for 30 seconds, push the service switch for a second. LD303 (red) will light and the unit will operate in the forced cooling mode at this time.
Page 185 HOW TO OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT MODEL RAC-E14H2 1. Turn off the power switch. 2. Remove the electrical box cover. 3. Turn on the power switch 4. After waiting for 30 seconds, push the service switch for a second. LD303 (red) will light and the unit will operate in the forced cooling mode at this time.
Page 186 IPM (Intelligent Power Module) DIAGNOSIS SSM1001MA Circuit diagram of Collector the device Emitter Circuit diagram of the module Terminals symbol mark of the module See next page for measuring value using multimeter - 185 -...
Page 187 IPM (Intelligent Power Module) DIAGNOSIS SSM1001MA Circuit diagram of Collector the device Emitter Circuit diagram of the module Terminals symbol mark of the module See next page for measuring value using multimeter - 186 -...
Page 188 To find the malfunction either the power supply of power P.W.B. or internal IC, please follow the - 187 -...
Page 189 To find the malfunction either the power supply of power P.W.B. or internal IC, please follow the - 188 -...
Page 190 3$576 /,67 $1' ',$*5$0 02'(/ - 189 -...
Page 191 - 190 -...
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Page 194 RAF-35NX2 / RAC-35NX2 AW NO. 0035EF...

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