Page 1: Table Of Contents
NO. 0633E RAI-50PPD/RAC-50NPD RAI-60PPD/RAC-60NPD SERVICE MANUAL TECHNICAL INFORMATION REFER TO THE FOUNDATION MANUAL FOR SERVICE PERSONNEL ONLY CONTENTS RA -50PPD SPECIFICATIONS ------------------------------------------------------- 5 RA -60PPD HOW TO USE ---------------------------------------------------------- 8 CONSTRUCTION AND DIMENSIONAL DIAGRAM ---------57 MAIN PARTS COMPONENT --------------------------------------60 OPTIONAL...
Page 2 SAFETY DURING REPAIR WORK 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.
Page 3 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 manufacturers 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 aluminium, stainless steel, etc.) Bare copper wire (for body earth) Working table Resistor 1 M (1/2W) Staple Earth wire Fig. 3. Grounding of the working table Soldering iron Grounding wire Screw stop at the screwed...
Page 5 CAUTION In quiet or stop operation, slight ﬂ owing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation. When it thunders nearby, it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety.
Page 6: Specifications
SPECIFICATIONS RAC-50NPD RAI-50PPD MODEL RAC-60NPD RAI-60PPD FAN MOTOR DC57W DC47W FAN MOTOR CAPACITOR FAN MOTOR PROTECTOR COMPRESSOR JX151XG1 COMPRESSOR MOTOR CAPACITOR OVERLOAD PROTECTOR OVERHEAT PROTECTOR 3.15A FUSE (MICRO COMPUTER CIRCUIT) POWER RELAY POWER SWITCH TEMPORARY SWITCH TEST/SERVICE SWITCH TRANSFORMER VARISTOR...
Page 7 Figure showing the installation of Indoor unit Distance from wall side Access door for duct adapter (optional) Access door for duct adapter (optional) Min. Min. Min. Min. Min. 1500 1500 1500 3000 1500 Service access door Service access door Service access door Electrical box Electrical box Electrical box...
Page 8 Figure showing the installation of Outdoor unit and refrigerant piping Be sure to completely seal any gap WARNING above 100mm with putty. Flare connection only at outside of building The indoor piping should be insulated with the enclosed insulation pipe. (If the insulator is Refrigerant piping insufﬁ...
Page 9 GENERAL INFORMATION No part of this publication may be reproduced, copied, filed HITACHI makes every effort to offer correct, up-to-date or transmitted in any shape or form without the permission of documentation. Despite this, printing errors cannot be controlled Johnson Controls-Hitachi Air Conditioning Spain, S.A.U.
Page 10 IMPORTANT NOTICE • HITACHI is not able to foresee all the circumstances which may • Do not use sprays, such as insecticides, varnishes or enamels or any result in a potential danger. other inflammable gas within a metre of the system.
Page 11 IMPORTANT NOTICE During operation: • Avoid an extended period of exposure to a direct air flo . Low temperature solder alloys, such as lead/tin alloys, are not acceptable for pipe connections. • Do not insert fingers, rods or other objects into the air outlet or inlet.
Page 12 IMPORTANT NOTICE or explosion, including cigarette smoking, must be kept damage. The check shall also take into account the effect sufficiently far away from the working area, since refrigerant of ageing or continual vibration from sources such as may be released to the surrounding space. The area around compressors of fans.
Page 13 BEFORE OPERATION or lines shall be as short as possible to minimise the with OFN. The system shall be leak tested on completion amount of refrigerant contained in them. of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.
Page 14 MAINTENANCE COOLING HEATING Air flow direction: the appropriate air outlet angle is approx. Air flow direction: the appropriate air outlet angle is approx. 35º. If the cooling is not sufficient, change the air flo 60º. If the heating is not sufficient, change the air flo direction.
Page 15 MAINTENANCE 5.1.1 Cleaning Air Filter 5.1.2 Removing, attaching and cleaning air inlet grille Open the air inlet grille. While sliding the knobs on both side of the air inlet grille in the arrow direction, open the air inlet grille. • Wipe the air inlet grille with a soft cloth soaked in lukewarm water and squeezed.
Page 16 Refrigerant gas pipe connection (with Øa flare nut Motion sensor (optional accessory) Refrigerant liquid pipe connection (with Øb flare nut Drain pipe connection (VP25) (mm) Drain discharge mechanism Float switch RAI-50PPD 12,7 6,35 RAI-60PPD 12,7 6,35 Regarding the refrigerant cycle drawings and diagrams, refer to Technical Catalogue.
Page 17 RAI-50PPD / RAI-60PPD RAC-50NPD / RAC-60NPD...
Page 18 AFTER SALE SERVICE AND WARRANTY WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS. CONDITION CHECK THE FOLLOWING POINTS If the remote controller is Do the batteries need replacement? ● not transmitting a signal. Is the polarity of the inserted batteries correct? ●...
Page 19 Remote Controller Manual MODEL SPX-RCDB (RAR-5G2)
Page 20 PRECAUTIONS FOR USE In case of power failure happen, Wired Remote Controller may not show current operating mode when power ● comes back. However unit will continue to operate at previous setting mode. Some features of Wireless Remote Controller are not available when use Wired Remote Controller as mentioned ●...
Page 21 NAMES AND FUNCTIONS OF REMOTE CONTROLLER ■ This controls the operation function and timer setting of the room air conditioner. OPERATION LAMP Transmission Sign The transmission sign blinks START/STOP Button when a signal has been Press this button to start operation. send.
Page 22 VARIOUS FUNCTIONS ■ Auto Restart Control If there is a power failure, operation will be automatically restarted when the power is resumed with ● previous operation mode. (As the operation is not stopped by remote controller.) If you intend not to continue the operation when the power is resumed, switch off the power supply. ●...
Page 23 HEATING OPERATION Use the device for heating when the outdoor temperature is under 21°C. ● When it is too warm (over 21°C), the heating function may not work in order to protect the device. ● In order to maintain reliability of the device, please use this device when outdoor temperature is above –15°C Press the MODE SELECTOR button so that the display indicates (HEAT).
Page 24 DEHUMIDIFYING OPERATION Use the device for dehumidifying when the room temperature is over 16°C. When it is under 15°C, the dehumidifying function will not work. Press the MODE SELECTOR button so that the display indicates (DEHUMIDIFY). Press (FAN SPEED) button to select SILENT or LOW fan speed.
Page 25 COOLING OPERATION Use the device for cooling when the outdoor temperature is –10 ~ 43°C. If indoor humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit. Press the MODE SELECTOR button so that the display indicates (COOL).
Page 26 LEAVE HOME(LH) AND CLEAN (ONE TOUCH CLEAN) OPERATIONS Leave Home (LH) and CLEAN(One Touch Clean) operations activation buttons are not available on this device. ● The operations shall be activated by wireless remote controller. Please refer to wireless 'Remote Controller Manual' to activate the operations. ●...
Page 27 TIMER RESERVATION ■ ON Timer and OFF Timer are available. ■ Operation stop at setting timer OFF Timer Reservation OFF TIMER setting ● Select the OFF TIMER by pressing the (OFF) Button. ● Setting timer will change according to the below sequence when you press the button.
Page 28 HOW TO SET THE SLEEP TIMER Mode Indication 1 hour 2 hours 3 hours 7 hours Sleep timer Sleep timer off Sleep Timer: The device will continue working for the designated number of hours and then turn off. Press the SLEEP button. The timer information will be displayed on the remote controller.
Page 29 INSTALLATION OF WIRED REMOTE CONTROLLER Connection to the electrical box; Remove the cover of electric box ● Connect the connector of wired remote controller to CN1102 of electrical board ● Assemble back the cover of electrical box ● Wiring installation for wired remote controller (2 methods); ●...
Page 30 Remote Controller Manual...
Page 31 PREPARATION BEFORE OPERATION ■ To install the batteries 1. Slide the cover to take it off. 2. Install two dry batteries AAA.LR03 (alkaline). The direction of the batteries should match the marks in the case. 3. Replace the cover at its original position. ■...
Page 32 PREPARATION BEFORE OPERATION ■ To set calendar and clock 1. Press (RESET) button when ﬁ rst time setting. "Year" blinks. 2. Press (TIME) button to set the current year. 3. Press (CLOCK) button. "Day" and "Month" blink. 4. Press (TIME) button to set the current day and month.
Page 33 NAMES AND FUNCTIONS OF REMOTE CONTROLLER REMOTE CONTROLLER This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting ● is controlled electronically, the range of control may be shorter. This unit can be ﬁ xed on a wall using the ﬁ xture provided. Before ﬁ xing it, make sure the indoor unit can be controlled from the remote controller.
Page 34 NAMES AND FUNCTIONS OF REMOTE CONTROLLER MODE selector Button POWERFUL Button Use this button to select the Use this button to set the operating mode. Every time you POWERFUL mode. ( p. 27) press this button, the mode will (AUTO) ➞ change from (HEAT) ➞...
Page 35 VARIOUS FUNCTIONS ■ Auto Restart Control ● If there is a power failure, operation will be automatically restarted when the power is resumed with previous operation mode and airﬂ ow direction. (As the operation is not stopped by remote controller.) ●...
Page 36 HEATING OPERATION ● Use the device for heating when the outdoor temperature is under 21°C. When it is too warm (over 21°C), the heating function may not work in order to protect the device. ● In order to maintain reliability of the device, please use this device when outdoor temperature is above –15°C.
Page 37 DEHUMIDIFYING OPERATION Use the device for dehumidifying when the room temperature is over 16°C. When it is under 15°C, the dehumidifying function will not work. Press the MODE selector button so that the display indicates (DEHUMIDIFY). The fan speed is set at LOW. Press (FAN SPEED) button to select SILENT or LOW fan speed.
Page 38 COOLING OPERATION Use the device for cooling when the outdoor temperature is -10~ 43°C. If indoors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit. Press the MODE selector button so that the display indicates (COOL).
Page 39 FAN OPERATION User can use the device simply as an air circulator. Press the MODE selector so that the display indicates (FAN). Set the desired FAN SPEED with the (FAN SPEED) button (the display indicates the setting). (HIGH) (MED) (LOW) (SILENT) START Press the...
Page 40 POWERFUL OPERATION ● By pressing (POWERFUL) button during AUTO, HEATING, DEHUMIDIFYING, COOLING or FAN operation, the air conditioner performs at the maximum power. ● During POWERFUL operation, cooler or warmer air will be blown out from indoor unit for COOLING or HEATING operation respectively.
Page 41 SILENT OPERATION ● By pressing (SILENT) button during AUTO, HEATING, DEHUMIDIFYING, COOLING or FAN operation, the fan speed will change to ultra slow. ■ To start SILENT operation ● Press (SILENT) button during operation. “ ” is displayed on the LCD. Fan speed will be ultra slow. ■...
Page 42 ECO OPERATION There are two kinds of ECO OPERATION with sensor or without sensor, depending on models. Please refer to [Names and Functions of each part] in the unit instruction manual to verify if your unit is equipped with a sensor and read the following instruction on ECO Operation accordingly. ECO OPERATION ECO operation is an energy saving function by changing set temperature automatically and by limiting the maximum power consumption value.
Page 43 ECO OPERATION ECO OPERATION with sensor The sensor detects the presence of people in the room. When nobody is detected, the unit automatically starts enegy saving operation by shifting the set temperature in two steps. By pressing the (ECO) button during AUTO, HEATING, DEHUMIDIFYING or COOLING operation, the air conditioner performs the "ECO"...
Page 44 LEAVE HOME (LH) OPERATION Prevent the room temperature from falling too much when no one is at home. The initial setting temperature is 10°C and the temperature range can be set between 10°C and 16°C. This operation is able to operate by "Continuous operation" or "Day timer operation". Please use "Day timer operation" to set the number of days up to 99 days.
Page 45 CLEAN (ONE TOUCH CLEAN) OPERATION Drying indoor heat exchanger after cooling operation to prevent mildew. ■ To start CLEAN operation ● Press (CLEAN) button when unit is OFF. Total time taken for One Touch Clean operation is 60 minutes. During this operation, HEATING or FAN operation shall operate.
Page 46 ONCE TIMER (ON/OFF TIMER) OPERATION OFF TIMER The device can be set to turn off at a preset time. 1. Press (OFF-TIMER) button. blink on the display. 2. Set the "turn-off time" with (TIME) button. 3. After setting, direct the remote controller towards the indoor and press (SEND) button.
Page 47 ECO SLEEP TIMER OPERATION The timer can be set up to a duration of 7 hours. By pressing (SLEEP) button during AUTO, HEATING, DEHUMIDIFYING, COOLING or FAN operation, the unit shifts the room temperature and reduces the fan speed. It results in energy saving. Set the current time ﬁ...
Page 48 ECO SLEEP TIMER OPERATION ■ To set ECO SLEEP TIMER and ON TIMER The air conditioner will be turned off by ECO SLEEP TIMER and turned on by ON TIMER. 1. Set the ON TIMER. 2. Press (SLEEP) button and set ECO SLEEP TIMER. Example: In this case, air conditioner will turn off in 2 hours (at 1:38) and it will be turned on at 6:00 the next morning.
Page 49 WEEKLY TIMER OPERATION It is possible to select Mode A or Mode B. For each mode, up to 6 programs can be set per day. In total, a ● maximum of 42 programs can be set for a week for each mode. If calendar and clock are not set, the reservation setting for WEEKLY TIMER cannot be set.
Page 50 WEEKLY TIMER OPERATION It is possible to select Mode A or Mode B. For each mode, up to 6 programs can be set per day. In total, a ● maximum of 42 programs can be set for a week for each mode. If calendar and clock are not set, the reservation setting for WEEKLY TIMER cannot be set.
Page 51 WEEKLY TIMER OPERATION 5. Press (ON-OFF TIMER) button to select ON TIMER or OFF TIMER reservation. 6. Press (TIME) button to set time reservation. 7. Press (TEMP ) button to set temperature reservation. 8. Press (OK) button. The reservations are set. Day, program number, ON reservation, setting temperature will light up.
Page 52 WEEKLY TIMER OPERATION Step 2: Select Mode A or Mode B and activate or deactivate WEEKLY TIMER. ■ How to select Mode A or Mode B of WEEKLY TIMER setting. 1. Press (WEEKLY) button. blink on the display. (Normally Mode A will blink ﬁ rst). 2.
Page 53 WEEKLY TIMER OPERATION Step 3: Copy and cancel the reservation schedule. ■ How to copy and paste. Editing the reservation schedule is easy by copying data from one day to another day. 1. Press (WEEKLY) button to select Mode A or Mode B. 2.
Page 54 WEEKLY TIMER OPERATION Step 3: Copy and cancel the reservation schedule. ■ How to delete WEEKLY TIMER data. [Delete one program number reservation] 1. Press (WEEKLY) button to select Mode A or Mode B. 2. Press (WEEKLY) button for 3 seconds to start editing the reserva- tion schedule.
Page 55 WEEKLY TIMER OPERATION Step 3: Copy and cancel the reservation schedule. [Delete one day reservation] 1. Press (WEEKLY) button to select Mode A or Mode B. 2. Press (WEEKLY) button for 3 seconds to start editing the reservation schedule. 3. Press (DAY) button to select a day of the week to edit.
Page 56 INFO FUNCTION ● By pressing (INFO) button, temperature around remote controller and monthly power consumption will be displayed on the remote controller. ● After changing the batteries, direct the remote controller towards the indoor unit and press (INFO) button. Current calendar and clock will be transmitted from indoor unit. ●...
Page 57 OPERATION MODE LOCK The remote controller can be set to ﬁ x the HEATING mode (including FAN), COOLING mode (including FAN) and DEHUMIDIFYING mode (including FAN) operations. ■ Method to lock HEATING mode (including FAN) operation. Press (ECO) and (POWERFUL) buttons simultaneously for about 5 seconds when the remote controller is OFF.
Page 58 Models: RAI-50PPD and RAI-60PPD with Air Panel P-AP56NAM Unit: mm View from A Shielded Twist-Pair Cable (Min. 0.75mm Remote Control Switch (Field-Supplied) (Optional) 580 (576~590) (Opening Hole for Ceiling) Air Inlet Air Outlet 4 - 12 Holes (for Suspension Bolt)
Page 59 Operation Space Models: RAI-50PPD and RAI-60PPD with Air Panel P-AP56NAMS Distance from Wall Side (mm) Access Door for Access Door for Duct Adapter (optional) Duct Adapter (optional) Min. Min. Min. Min. Min. 1500 1500 1500 3000 1500 Service Service Service...
Page 60 MODEL RAC-50NPD RAC-60NPD 53 169 Handle Handle Air suction grille Air Outlet Holes for anchor bolt (2-Ø12) Fixing hole Notch for anchor bolt (2-Ø12 Notchs)
Page 61 Thermostat Speciﬁ cations RAI-50PPD/RAI-60PPD MODEL THERMOSTAT MODEL OPERATION MODE COOL HEAT 15.6 (60.1) 20.0 (68.0) INDICATION 15.3 (59.5) 20.7 (69.3) TEMPERATURE 23.6 (74.5) 28.0 (82.4) INDICATION °C (°F) 23.3 (73.9) 28.7 (83.7) 31.6 (88.9) 36.0 (96.8) INDICATION 31.3 (88.3) 36.7 (98.1) FAN MOTOR Fan Motor Speciﬁ...
Page 63 MODEL RAI-50PPD/RAC-50PPD & RAI-60PPD/RAC-60PPD INDOOR Ｍ FAN MOTOR IPM P.W.B DRAIN PUMP WIRED REMOTE MOTION CN21(BLU) MOTOR RUN STATUS HA / CARD-KEY CONTROLLER SENSOR P(+) N(-) COMPRESSOR CAPA P.W.B １ CN3A CN25 CN1102 CN12A CN10 TERMINAL 3.15A MAIN P.W.B. OUTDOOR...
Page 66: Circuit Diagram
CIRCUIT DIAGRAM CIRCUIT DIAGRAM MODEL MODEL RAI-50PPD, RAI-60PPD RAI-50PPD, RAI-60PPD INDOOR FAN MOTOR T001(SW TRANS) CN12A 5 4 3 C204 GRN1 RESISTOR CAPACITOR CONNECTOR VALUE POWER ASSY. VALUE VOLT ASSY. ASSY. C907 FORM PCBA GROUP REMARK TYPE FORM PCBA CHAR GROUP REMARK...
Page 67 MODEL : RAC-50NPD/RAC-60NPD REACTOR TAB7 TAB5 MOUNTING FOARMING A : AXIAL INSERTION R : RADIAL INSERTION P : RADIAL INSERTION (7.5mm pitch) H : HAND INSERTION C : CHIP FOR ACT MOUNTING BOARD H : HIC PCB (#HIC-BOARD) 5P C HIC C HIC CIRCUIT TO DETECT INSTANT CURRENT FOR ACT C HIC CIRCUIT TO DETECT EXCESS CURRENT FOR ACT (7-H) (5-G) C HIC A SIDE MOUNTING C HIC C HIC C HIC C HIC C HIC C HIC C HIC...
Page 68 MODEL : RAC-50NPD/RAC-60NPD REACTOR TAB7 TAB5 COMPR motor C915 R009 MOUNTING FOARMING A : AXIAL INSERTION R : RADIAL INSERTION P : RADIAL INSERTION (7.5mm pitch) DRIVER CIRCUIT H : HAND INSERTION C : CHIP FOR ACT R905 MOUNTING BOARD L001 R907 M : MAIN PCB (#MBOARD-AS)
Page 69 RAI-50PPD, RAI-60PPD...
Page 71 RAC-50NPD, RAC-60NPD...
Page 75 Notes: (1) Cool dash is started when the operation is started at fan speed “AUTO” or “HI” or when the fan speed is changed to “AUTO” or “HI” during cooling operation, and when the compressor speed (P item) reaches (CMAX_M or CMAX2_M) or higher. (2) The maximum compressor speed period during cool dash is ﬁ...
Page 77 – 65 –...
Page 83 In the room Cooling / Heating period In the room period Absent period operation ECO button press Remocon Signal Operation lamp Human sensor No signal No signal Pulse signal Absent flag In the room Timer [MNONTM] [MANON1] [MANOF1] Count down Absent Time 1 [MNOFTM] [MANOF2]...
Page 84: Refrigerating Cycle Diagram
REFRIGERATING CYCLE DIAGRAM RAI-50PPD / RAC-50NPD RAI-60PPD / RAC-60NPD COOLING, DEHUMIDIFYING, DEFROSTING INDOOR UNIT OUTDOOR UNIT COMP SUCTION TANK REVERSING VALVE HEX Thermistor 4S VALVE (12.7mm)(2/4") ELECTRIC EXPANSION VALVE 2S VALVE (6.35mm)(1/4") STRAINER RAI-50PPD / RAC-50NPD RAI-60PPD / RAC-60NPD HEATING...
Page 85: Servicing
SERVICING 1. Servicing ..............................85 4-Way Cassette (Compact) Type ...................... 85 1.1.1 Removing Air Filter and Air Inlet Grille ..................85 1.1.2 Removing Electrical Box Cover ....................86 1.1.3 Removing Optional Air Panel ....................87 1.1.4 Removing Turbo Fan and Fan Motor ..................89 1.1.5 Removing Printed Circuit Board ....................
Page 86: Servicing
SERVICING (4-Way Cassette (Compact) Type) Servicing Use the specified refrigerant (R32), an odourless flammable refrigerant to the outdoor unit in the refrigerant cycle. Do not charge the unit with materials other than R32, such as hydrocarbon refrigerants (propane, etc.), oxygen, flammable gases (acetylene, etc.) or poisonous gases when installing, maintaining and moving the unit.
Page 87: Removing Electrical Box Cover
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. Take care not to drop the electrical box cover. 1.1.2 Removing Electrical Box Cover (1) The electrical box appears when opening the air inlet grille. Loosen 2 fixing screws for the electrical box cover and open the electrical box. Tool Phillips Screwdriver Slide the electrical boxcover downward to remove. Electrical Box Electrical Box Cover Fixing Screws for Electrical Box Cover Loosen the fixing screws to remove the electrical box cover.
Page 88: Removing Optional Air Panel
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.3 Removing Optional Air Panel (1) Remove the auto swing motor connector (CN7) from PCB. (2) Remove the corner pocket covers. The corner pocket covers can be removed by pulling "A" part toward the arrow direction in the figure below. Tool Phillips Screwdriver Electrical Box...
Page 89 SERVICING (4-Way Cassette (Compact) Type) (3) Remove the long screws of A at the air panel. Loosen the long screws of B and rotate the air panel to arrow direction to remove the air panel. Tool Phillips Screwdriver Refrigerant Pipe Indoor Unit Electrical Box Fixing Plate (Indoor Unit) Indication Mounting “PIPE SIDE” Sheet Air Panel Long Screw (Q'ty: 4pcs.)
Page 90: Removing Turbo Fan And Fan Motor
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.4 Removing Turbo Fan and Fan Motor (1) Remove the air inlet grille according to the item 1.1.1 “Removing Air Filter and Air Inlet Grille.” (2) Removing Bell-mouth Remove 4 fixing screws for the bell-mouth fixed to the drain pan, and remove the bell-mouth. (3) Removing the Fan Guide Remove the 8 fixing screws for the fan guide and remove the fan guide. (4) Removing Turbo Fan and Fan Motor (a) Remove the nut fixing the fan runner. (b) Remove 3 nuts fixing the fan motor. (c) Then remove the fan motor. Tool Phillips Screwdriver, Adjustable Wrench Vibration Absorber (3 pcs, Tightning Torque: 8 N . m) Wire Cover Fan Motor Fixing Nut...
Page 91: Removing Printed Circuit Board
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.5 Removing Printed Circuit Board Remove the electrical box cover according to the item 1.1.2 “Removing Electrical Box Cover.” Disconnect all wire connectors from the indoor unit PCB. Remove the screw for earth wire. Remove the screw then remove the PCB cover.
Page 92: Removing Drain Pan
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.6 Removing Drain Pan (1) Remove the air panel according to the item 1.1.3 “Removing Optional Air Panel.” (2) Remove the screw then remove the wire cover. (3) Remove the electrical box cover according to the item 1.1.2 “Removing Electrical Box Cover.” Disconnect the connectors of the the gas pipe thermistor, the liquid pipe thermistor, the expansion valve and the fan motor. (4) Remove the bell-mouth according to the item 1.1.4 “Removing Turbo Fan and Fan Motor.” (5) Draining Water (a) Pull out the rubber plug from the drain pan, and drain the water remaining in the drain pan. Although silicon sealant is applied over the rubber plug, the rubber plug can be removed by pulling the bottom side. NOTE: 1. Do not damage the rubber plug with a cutter. 2. Do not damage or remove the insulation attached to the bottom side of the rubber plug when removing/attaching it (b) Check any clogging in the drain hole. (6) Removing Drain Pan (a) Remove 4 screws fixing the drain pan to the unit. (b) Then lift the drain pan down to remove it from the unit.
Page 93: Removing Drain-Up Mechanism
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.7 Removing Drain-up Mechanism (1) Remove the drain pan according to the item 1.1.6 “Removing Drain Pan.” (2) Remove the lead wires for the drain up mechanism, float switch and outlet air thermistor gathered with vinyl tube and clamping band (Do not dispose the vinyl tube). (3) Cut the plastic band and disconnect the drain hose from the drain-up mechanism. (4) Remove the fixing screw for the drain-up mechanism. Make sure to hold the drain-up mechanism by hand so that it will not fall off. (5) Then remove the drain-up mechanism. Tool Phillips Screwdriver Plastic Band Drain Hose Float Switch Fixing Screw for Float Switch Drain-up Mechanism Fixing Screw for Drain-up Mechanism (3 pcs) Fixing Base of Drain-up Mechanism...
Page 94: Removing Float Switch
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.8 Removing Float Switch (1) Remove the drain pan according to the item 1.1.6 “Removing Drain Pan.” (2) Remove the lead wires for the drain up mechanism, float switch and outlet air thermistor according to the item 1.1.7 "Removing Drain-up Mechanism" (3) Removing Float Switch (a) The float switch is attached to the drain pan. Remove the fixing screw and remove the fixing plate for the float switch from the drain pan. (b) Loosen the resin nut for the float switch and remove the float switch from the fixing plate. Tool Phillips Screwdriver, Nipper Drain-up Mechanism Float Switch Fixing Plate Fixing Screw for Drain-up Mechanism (3 pcs) Float Switch Fixing Screw for Float Switch...
Page 95: Removing Gas Pipe Thermistor
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1. Removing Gas Pipe Thermistor Remove the air panel according to the item 1.1.3 “Removing Optional Air Panel.” Remove the bell mouth and the fan runner according to the item 1.1.4 "Removing Turbo Fan and Fan Motord Remove the drain pan according to the item 1.1.6 “Removing Drain Pan"...
Page 96: Removing Inlet Air Thermistor
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.10 Removing Inlet Air Thermistor (1) Remove the inlet air thermistor connector (THM1) from fixing base. (2) Remove the bell-mouth according to the item 1.1.4 "Removing Turbo Fan and Fan Motor". (3) Tear off the filament tape then remove the thermistor cable attached to the bell-mouth. (4) Push the thermistor case cover to the direction shown in the picture below to remove the inlet air thermistor with the thermistor case cover. Tool Phillips Screwdriver Thermistor Cable with Filament Tape Thermistor Case Cover Bell-Mouth Bell-Mouth Thermistor Case Cover Pushing Direction...
Page 97: Removing Auto Louver Motors And Louver
SERVICING (4-Way Cassette (Compact) Type) TURN OFF all power source switches. 1.1.11 Removing Auto Louver Motors and Louver (1) Remove the air panel according to the item 1.1.3 “Removing Optional Air Panel.” (2) Remove the fixing screw for C-cover and remove the C-cover. (3) Remove the fixing screw for AS Motor from the air panel. Then remove the louver, louver bearing and AS motor. (4) Remove the AS motor, stopper and bearing from the louver. (5) Disconnect the connector for the AS motor. Press the catch to disconnect the connector to avoid breakage. Tool Phillips Screwdriver Bearing C-Cover Screw Louver Air Panel Air Panel Bearing Connector AS Motor Louver Bearing Bearing AS Motor...
Page 98: Cleaning Indoor Unit Heat Exchanger
SERVICING (Cleaning Indoor Unit Heat Exchanger) 1.2 Cleaning Indoor Unit Heat Exchanger 1.2.1 Required Tools for Cleaning Remark Tool Remark Cleaning Water Pump Water Tank Approx. 18 liters Clean Water A water pump equipped with Nozzle Attached with Water Pump a tank is recommended. Brush If the heat exchanger is heavily (non-metal) clogged with dust, remove it with this brush. The length of brush should be 25 to 35mm. Hose for Select a hose according to site Water Pan requirements. Bucket 2 Nos. for 5 liters Phillips 1 No. Screwdriver Nipper 1 No. Adjustable 1 No. Wrench Megohm Tester 500V...
Page 99: Cleaning Procedure
SERVICING (Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. 1.2.2 Cleaning Procedure Spread a vinyl sheet over the floor to protect furniture, etc. from cleaning water before this work. Procedure Tool Remove the optional air panel according to the item 1.1.3 "Removing Optional Phillips Screwdriver Air Panel." Remove the electrical box after opening the electrical box cover and disconnecting the connectors between the indoor and outdoor units and other Phillips Screwdriver connectors according to the item 1.1.2 "Removing Electrical Box Cover." Remove the bell-mouth and fan according to the item 1.1.4 "Removing Turbo Phillips Screwdriver Adjustable Wrench Fan and Fan Motor." Remove the drain pan according to the item 1.1.6 "Removing Drain Pan." Phillips Screwdriver Remove the float switch according to the item 1.1.9 "Removing Float Switch." Phillips Screwdriver Remove the drain-up mechanism according to the item 1.1.8 "Removing Phillips Screwdriver Drain-up Mechanism." NOTES: Remove the drain pan after removing drain water in the drain pan. 1. Remove the drain water in the drain pan after pulling out the rubber plug. Check to ensure that water flows smoothly through the hole by pricking it with a pencil.
Page 100 SERVICING (Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (1) Scratch off the dust on the inner surface of the heat exchanger downwards using a brush. Collect all dust in a bucket or carton box. Tool Brush, Bucket (or Carton Box) (2) Attach a vinyl sheet around the heat exchanger by using adhesive tapes so that cleaning water will not be splashed over the insulation surface and drain-up pump. Seal the gap between vinyl sheets by using adhesive tapes. (3) Attach ropes to each suspension bracket. (4) Insert the bars through the holes of the cleaning water collector as shown in the page 2-15. (5) Attach the ropes to the four bars of the cleaning water collector and suspend the cleaning water collector as shown in the figure. (6) Connect the hose to the boss and put the end of the hose in a bucket. Tool Cutter Knife, Bucket Suspension Indoor Unit Bolt Rope Suspension Support Bracket Cleaning The water...
Page 101 SERVICING (Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (7) Put approximately 15 liters of cleaning agent for aluminum fins in the supply tank. Cleaning Agent for Aluminum Fins (8) Insert the spray nozzle into the hole of the cleaning water collector. Operate the water pump and clean the dust on the heat exchanger. After cleaning, spray clean water to remove the cleaning water. Adjust the pressure of the water pump so as not to damage the fins. Clean Water, Cleaning Agent, Tool Water Pump, Cleaning Spray Cleaning Spray Bucket NOTES: 1. If the cleaning water remains, fins will be corroded. 2. Adjust the pressure of the pump at 2.5 to 5.0 kg/cm so as not to damage the fins.
Page 102 SERVICING (Cleaning Indoor Unit Heat Exchanger) TURN OFF all power source switches. (9) After cleaning, mount the drain pan by extending the rope downwards. NOTE: When the cleaning water collector is removed, wipe off the drops from the indoor unit. Tool Phillips Screwdriver Drain Pan Cleaning Water Collector (10) Check the insulation of the drain pump with a megohm-meter. Check to ensure that the insulation is greater than 1 MΩ when 500V is applied. (11) Connect wiring as it was. (12) Neutralization Treatment after Cleaning The cleaning agent specified in the item 1.2.1 is of the neutral type. However, the cleaning water after use may not be neutral. Collect all cleaning water and provide necessary neutralization treatment for the cleaning water.
Page 103: Dismantle Procedure Of Outdoor Unit
SERVICING SERVICING (Outdoor Unit) TURN OFF all power source switches. 1.3 Dismantle procedure of Outdoor unit OUTDOOR UNIT RAC-50NPD / RAC-60NPD...
Page 104 RAI-50PPD, RAI-60PPD...
Page 105 CN12A IC733 CN12A CN12A CN12A.
Page 107 L801 R803 Outdoor reception circuit Outdoor transmitting circuit Q203 Outdoor microcomputer Outdoor reception input Outdoor transmission output...
Page 108 If the cable poorly inserted in the indoor terminal board or some other failure overheats the terminal board, the power to the indoor communication circuit will be shut down to stop the communications function.(In that case, the failure will be displayed by the timer lamp blinking 3 times.)
Page 109 CN1A CN2A CN1A CN2A R621...
Page 110 D909 DC12V CN3A IC733...
Page 111 9. High static pressure switch NORMAL HIGH “STATIC PRESSURE SW” on the PCB must be set to HIGH PRESSURE when installing the indoor unit at a height of more than 2500mm from the floor. “STATIC PRESSURE SW” on the PCB must be set to NORMAL when installing the indoor at a height of less than 2500mm from the floor.
Page 112 R297 R282...
Page 113 R255 12-1 12-1 12-2 – 112 –...
Page 117 4. Reversing valve control circuit This model reversing valve control used to control the relay ON/OFF of the reversing valve, and also control the coil of the reversing valve ON/OFF. The relay ON/OFF has different type when in the different operation mode. You can see each operation mode as follows.
Page 157 RAR-5E1, RAR-5E2, RAR-5E3, RAR-5E4, RAR-5E5, RAR-6N1, RAR-6N2, RAR-6N3, RAR-6N4 and RAR-6N5)
Page 163 SUMMARY OF TROUBLESHOOTING METHOD FOR OUTDOOR UNIT Test Run MODEL : RAC-50NPD AND RAC-60NPD 1) Remove Terminal 3 connection. Checking the fan motor Checking the IPM IC of IPM P.W.B. 2) Power ON the unit and winding. 1) Power off the unit. wait for 30 seconds.
Page 164 New Mini Cassette Type Indoor Units for RAC application NEWS 1. This issue includes recommended Spare Parts Lists for the following Mini Cassette Type Indoor Units series air conditioners for RAC application produced by Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. 2. The details are indicated in the description.
Page 165 E05535 PCB1 PCB Additional Work XEK50642 B E05536 PCB1 Spacer XEK30992 D E05349 for PCB1 Push Spacer XEK50629 A E05537 for PCB1 Terminal Block XEK26119 A E05538 φ12.7 Flare Nut 17E20872 C R4226 Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. EPN-201708A...
Page 166 Fan Guide 1 X17F17266 A E05354 Fan Guide 2 X17F17267 A E05355 Fan Guide 3 X17F17268 A E05356 Fan Guide 4 X17F17269 A E05357 E- Box Unit XEK26259 A E05402 Includes Plates and Rubber Bush Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. EPN-201708A...
Page 167 Pan Head Tapping Screw Spring Lock Washer Hexagon Head Bolt Toothed Lock Washer NOTE: The unicromated coating is applied to iron and steel material for the unspecified materials of the bolt and screw. Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. Nº EPN-201708A...
Page 168 Knob Holder 17F16429 A P30751 Spring 17H27082 A P30795 Air Filter 17B46725 C P31594 C-Cover Assy 17H29509 A P30753 C-Cover Assy 17H29510 A P30754 Long Screw 17G76972 A P26862 Cable AS 17B46721 A Johnson Controls-Hitachi Air Conditioning Spain, S.A.U. EPN-201708A...
Page 169 The parts without order number are the custom-ordered, and these are not mentioned in the price list. When ordering them, the part name and the drawing number are required. Contact your HITACHI distributor for the delivery date and price about them. Johnson Controls-Hitachi Air Conditioning Spain, S.A.U.
Page 170: Parts List And Diagram
PART LIST AND DIAGRAM OUTDOOR UNIT MODEL : RAC-50NPD RAC-60NPD...
Page 171 MODEL RAC-50NPD RAC-50NPD PMKPNT1 PUSH NUT PMRAC-2226HV COMPRESSOR RUBBER PMRAC-25NH4 OVERHEAT THERMISTOR SUPPORT PMRAC-25NPA ELECTRICAL EXPANSION COIL EXPANSION VALVE PMRAC-25NPA PMRAC-30MH1 TOP COVER PMRAC-50NH4 VALVE (2S) PMRAC-50NH4 VALVE (4S) PMRAC-50NPD COMPRESSOR PMRAC-50NPD P.W.B (MAIN) PMRAC-50NPD CONDENSOR STRAINER (COND) PMRAC-50NPD PMRAC-50NPD CABINET PMRAC-50NPD STRAINER(PIPE)
Page 172 MODEL RAC-60NPD RAC-60NPD PMKPNT1 PUSH NUT PMRAC-2226HV COMPRESSOR RUBBER PMRAC-25NH4 OVERHEAT THERMISTOR SUPPORT PMRAC-25NPA ELECTRICAL EXPANSION COIL EXPANSION VALVE PMRAC-25NPA PMRAC-30MH1 TOP COVER PMRAC-50NH4 VALVE (2S) PMRAC-50NH4 VALVE (4S) PMRAC-50NPD COMPRESSOR PMRAC-60NPD P.W.B (MAIN) PMRAC-50NPD CONDENSOR STRAINER (COND) PMRAC-50NPD PMRAC-50NPD CABINET PMRAC-50NPD STRAINER(PIPE)
Page 173 HITACHI RAI-50PPD/RAC-50NPD PM NO. 0633E RAI-60PPD/RAC-60NPD Printed in Malaysia...

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