Hitachi Utopia RPI-2.5HRG Service Manual
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Hitachi Utopia RPI-2.5HRG Service Manual

Dc inverter utopia series for europe
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HITACHI UTOPIA SERIES
INVERTER-DRIVEN SPLIT-SYSTEM
HEAT PUMP AIR CONDITIONERS
- DC Inverter UTOPIA for Europe -
Models
Indoor Units
• In-the-Ceiling Type
RPI-2.5HRG
RPI-4.0HRG
RPI-3.0HRG
RPI-5.0HRG
• 4-Way Cassette Type
RCI-2.5HRG
RCI-4.0HRG
RCI-3.0HRG
RCI-5.0HRG
• 2-Way Cassette Type
RCD-2.5HRG
RCD-4.0HRG
RCD-3.0HRG
RCD-5.0HRG
• Ceiling Type
RPC-2.5HRG
RPC-4.0HRG
RPC-3.0HRG
RPC-5.0HRG
Outdoor Units
RAS-3HVRG
RAS-4HVRG
RAS-5HVRG
P5413554

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Summary of Contents for Hitachi Utopia RPI-2.5HRG

  • Page 1 HITACHI UTOPIA SERIES INVERTER-DRIVEN SPLIT-SYSTEM HEAT PUMP AIR CONDITIONERS - DC Inverter UTOPIA for Europe - Models Indoor Units • In-the-Ceiling Type RPI-2.5HRG RPI-4.0HRG RPI-3.0HRG RPI-5.0HRG • 4-Way Cassette Type RCI-2.5HRG RCI-4.0HRG RCI-3.0HRG RCI-5.0HRG • 2-Way Cassette Type RCD-2.5HRG RCD-4.0HRG RCD-3.0HRG...

  • Page 2: Table Of Contents

    - CONTENTS - Page 1. TROUBLESHOOTING ..........................1-1 1.1 Initial Troubleshooting .......................... 1-1 1.1.1 Rotary Switch and Dip Switch Setting ..................1-1 1.1.2 Checking of Electrical Wiring ......................1-5 1.1.3 Checking by 7-Segment Display ....................1-6 1.1.4 Failure of Power Supply to Indoor Unit and Remote Control Switch ..........1-7 1.1.5 Abnormal Transmission between Remote Control Switch and Indoor Unit ........
  • Page 3 - CONTENTS - Page 3. MAIN PARTS .............................. 3-1 3.1 Inverter ..............................3-1 3.1.1 Specifications of Inverter ......................3-1 3.1.2 Arrangement of Inverter Power Unit ..................... 3-2 3.2 AC Chopper ............................3-3 3.3 Auto-Louver Mechanism ........................3-5 3.3.1 4-Way Cassette Type ........................3-5 3.3.2 2-Way Cassette Type ........................

  • Page 4: Troubleshooting

    TROUBLESHOOTING TROUBLESHOOTING Initial Troubleshooting 1.1.1 Rotary Switch and Dip Switch Setting (1) Indoor Unit The PCB in the indoor unit is equipped with 3 or 4 types of dip switches and rotary switch. Before testing unit, set these dip switches according to the following instructions. Unless these dip switches are set in the field, the unit can not be operated.
  • Page 5 TROUBLESHOOTING (c) Refrigerant Cycle No. Setting (DSW5) Setting is required. Setting position before shipment is all OFF. 1 2 3 4 (d) Fuse Recover (DSW7) * No Setting is required. Setting position before shipment is all OFF. * In the case of applying high voltage to the terminal 1, 2 of TB2, the fuse (0.5A) on the PCB, is cut.
  • Page 6 TROUBLESHOOTING (c) Refrigerant Cycle No. Setting (DSW5) Setting is required. Setting position before shipment is all OFF. 1 2 3 4 (d) Unit Model Code Setting (DSW6) No setting is required. Setting the model code of the indoor unit. RPI-2.0HRG Model Code Model Code: Model Code...
  • Page 7 TROUBLESHOOTING (2) Outdoor Unit TURN OFF all power sources before setting. Without turning OFF, the switches do not work and the contents of the setting are invalid. Mark of “■” indicates the position of dip switches. Set the dip switches according to the figure below. NOTE •...

  • Page 8: Checking Of Electrical Wiring

    TROUBLESHOOTING 1.1.2 Checking of Electrical Wiring G Check to ensure that the terminal for power source wiring (terminals “L1” to “L1” and “N” to “N” of each terminal board: AC220V) and intermediate wiring (Operating Line: terminals “1” to “1” and “2” to “2”...

  • Page 9: Checking By 7-Segment Display

    TROUBLESHOOTING 1.1.3 Checking by 7-Segment Display (1) Simple Checking by 7-Segment Display /Turn on All Indoor Unit(s) / All the Indoor Unit(s) Connected to the Outdoor Unit Turn on the Outdoor Unit Auto-addressing Starts During auto-addressing, the following items can be checked using the outdoor unit's on-board 7-segment LED display.

  • Page 10: Failure Of Power Supply To Indoor Unit And Remote Control Switch

    TROUBLESHOOTING 1.1.4 Failure of Power Supply to Indoor Unit and Remote Control Switch G Lights and LCD are not Indicated. G Not Operated If fuses are melted or a breaker is activated, investigate the cause of over current and take necessary action.

  • Page 11: Abnormal Transmission Between Remote Control Switch And Indoor Unit

    TROUBLESHOOTING (1.1.4 Failure of Power Supply to Indoor Unit and Remote Control Switch) Check it by Replace remote Failure of Remote Control Switch self-checking mode *1). control switch if failed. Unconnected Wires Correctly connect Check connectors. to PCB wires. Failure of PCB Check it by Failure of PCB Replace PCB if failed.

  • Page 12: Abnormalities Of Devices

    TROUBLESHOOTING 1.1.6 Abnormalities of Devices In the case that no abnormality (Alarm Code) is indicated on the remote control switch, and normal operation is not available, take necessary action according to the procedures mentioned below. Action Phenomenon Cause Check Item (Turn OFF Main Switch) Disconnected Measure coil...
  • Page 13 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check Setting Condition of "Thermistor of Remote Control Switch" by Optional Setting * Setting and Control "00": Control by Indoor Thermistor for Suction Air In case that "01": Control by Incorrect Optional thermistor of remote...
  • Page 14 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Failure of Failure of Thermistor Replace or correctly Discharge Check thermistor by connect wiring when Air Temp. self-checking *2). Disconnected it is abnormal. Thermistor Wire of Thermistor Failure of Remote Indoor Fan...
  • Page 15 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Indoor Heat Load is Greater Calculate heat load. Use a bigger unit. than Cooling Capacity Gas Leakage Correctly charge or Shortage Measure superheat. refrigerant after of Refrigerant repairing gas leakage.
  • Page 16 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check clogging of outdoor unit heat Remove clogging. exchanger. Obstacles at inlet or Insufficient outlet of outdoor unit Remove obstacles. Air Flow to heat exchanger? Outdoor Unit Heat Is service space for Secure service space.
  • Page 17 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Indoor Heat Load is Greater Replace the unit with Calculate heat load. than Heating Capacity a bigger unit. Gas Leakage Correctly charge or Insufficient refrigerant after gas Measure superheat.
  • Page 18 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check for filter clogging. Remove clogging. Insufficient Air Flow to Check for any obstacles Indoor Unit at inlet or outlet of Remove obstacles. Heat indoor unit. Exchanger Check indoor fan speed.
  • Page 19 TROUBLESHOOTING (1.1.6 Abnormalities of Devices) Action Phenomenon Cause Check Item (Turn OFF Main Switch) Foreign Particles Inside Remove foreign Check it by viewing. of Fan Casing particles. Indoor Unit Fan Runner Adjust position of Check it by viewing. is Hitting Casing fan runner.

  • Page 20: Troubleshooting Procedure

    TROUBLESHOOTING Troubleshooting Procedure G Alarm Code Indication of Remote Control Switch Indoor Unit Alarm Code Model Code Connected No. Alarm Code Number of Indoor Units COOL COOL ADDS. RN Indicated ALARM for a second ALARM alternately 1.2.1 Alarm Code Table Code Category Content of Abnormality...

  • Page 21: Troubleshooting By Alarm Code

    TROUBLESHOOTING 1.2.2 Troubleshooting by Alarm Code Alarm Activation of Safety Device in Indoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
  • Page 22 TROUBLESHOOTING Alarm Activation of Safety Device in Outdoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 23 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Clogging of Heat Remove clogging. Exchanger? Check for dust on Remove dust. air filter. Insufficient Air Flow to Heat Exchanger Check for any obstacles (Outdoor Heat Exchanger at inlet or outlet of Remove obstacles.
  • Page 24 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Check for clogging. Remove clogging. Check connecting Replace connector. wiring and connectors. Faulty or Malfunction of Check operating sound Replace coil. Expansion Valve from coil. Check discharge gas Replace thermistor. thermistor.
  • Page 25 TROUBLESHOOTING Alarm Abnormal Transmitting between Indoor Units and Outdoor Unit Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, or the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 26 TROUBLESHOOTING Is DSW5-1P (Terminal Resistance) Set it correctly. on PCB1 ON? Is the voltage Check the fuses of Is LED1 (red) on between "1P" and "3P" outdoor unit power PCB1 ON? of PCN1 on PCB1 supply. 220V or 240V? 1P: Pin No.1 Remove CN8 of Is connector (PCN2, PCB1.
  • Page 27 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Measure voltage by Power Failure of No Power Supply Supply power. tester. Check for breakage Remove short circuit Short Circuit between Wires of insulation. and replace fuse. Short Circuited Wire Measure insulation Remove short circuit to Melted Fuse for...
  • Page 28 TROUBLESHOOTING Alarm Abnormal Transmitting between Inverter and Outdoor PCB1 Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB1.
  • Page 29 TROUBLESHOOTING Alarm Excessively Low or High Voltage for Inverter Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 30 TROUBLESHOOTING Alarm Decrease of Discharge Gas Superheat Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB. # In the case that the discharge gas superheat less than 10 deg.
  • Page 31 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Ref. Cycle is Different from Check ref. cycle and Repair wiring. the Electrical System the electrical system. Measure pressure. Correctly charge Overcharged Refrigerant (Refer to Figure in refrigerant. Test Run of TCII.) Check ex.
  • Page 32 TROUBLESHOOTING Excessively High Discharge Gas Temperature Alarm Code at the Top of Compressor Chamber G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 33 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Inlet Air Temperature Alarm Code (Air Inlet Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 34 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Discharge Air Temperature Alarm Code (Air Outlet Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 35 TROUBLESHOOTING Abnormality of Thermistor for Indoor Unit Heat Exchanger Alarm Code Gas Refrigerant Pipe Temperature (Gas Piping Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 36 TROUBLESHOOTING Activation of Protection Device for Indoor Fan Motor Alarm Code (except RCI-Model) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 37 TROUBLESHOOTING Activation of Protection Device for Indoor Fan Motor Alarm Code (RCI-Model) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 38 TROUBLESHOOTING Abnormality of Thermistor for Discharge Gas Temperature Alarm Code (Compressor Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No.
  • Page 39 TROUBLESHOOTING Abnormality of Thermistor for Outdoor Air Temperature Alarm Code (Outdoor Unit Ambient Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 40 TROUBLESHOOTING Abnormality of Thermistor for Evaporating Temperature Alarm Code during Heating Operation (Outdoor Unit Evaporating Thermistor) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 41 TROUBLESHOOTING Incorrect Capacity Setting or Combined Capacity Alarm Code between Indoor Units and Outdoor Unit G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 42 TROUBLESHOOTING Alarm Incorrect Indoor Unit No. Setting Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB. # This alarm code is indicated 3 minutes after power is supplied to the outdoor unit when the indoor unit No.
  • Page 43 TROUBLESHOOTING Cooling Overload Alarm Code (High Pressure Switch will be Activate) This alarm code is indicated when the protection device is activated at following condition. Evaporating temperature of outdoor unit is more than 55 degree and top of compressor temperature is more than 95 degree.
  • Page 44 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Clogging of Heat Remove clogging. Exchanger? Check for dust on Remove dust. air filter. Insufficient Air Flow to Heat Exchanger Check the service of Outdoor Unit Secure service space. space. Check for speed.
  • Page 45 TROUBLESHOOTING Heating Overload Alarm Code (High Pressure Switch will be Activate) This alarm code is indicated when the protection device is activated at following condition. Liquid refrigerant piping temperature of indoor unit is more than 55 degree and top of compressor temperature is more than 95 degree.
  • Page 46 TROUBLESHOOTING Action Phenomenon Cause Check Item (Turn OFF Main Switch) Reduce heat load or Calculate heat load. use a bigger unit. Check for hot air near Make good circulation. the ceiling. Excessively High Temp. Air to Indoor Unit Heat Exchanger Check for short Remove circuited air.
  • Page 47 TROUBLESHOOTING Activation to Protect System from Excessively Low Suction Pressure Alarm Code (Protection from Vacuum Operation) G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 48 TROUBLESHOOTING Alarm Abnormality of Current Transformer (0A Detection) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 49 TROUBLESHOOTING Alarm Activating Protection Against Instantaneous Overcurrent of Inverter (1) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 50 TROUBLESHOOTING Alarm Activating Protection Against Instantaneous Overcurrent of Inverter (2) Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 51 TROUBLESHOOTING Alarm Protection Activation of ISPM Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB. # ISPM have detecting function of abnormality.
  • Page 52 TROUBLESHOOTING Alarm Activating Protection Against Temperature Increasing of Inverter Fin Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the alarm code is indicated on the display of the outdoor unit PCB.
  • Page 53 TROUBLESHOOTING Alarm Abnormality of Fan Motor Protection Code G “RUN” light flickers and “ALARM” is indicated on the remote control switch. G The unit No., alarm code and the unit code is alternately indicated on the set temperature section, and the unit No. and alarm code are indicated on the display of the outdoor unit PCB. # This alarm is indicated when the revolution pulse output from the fan motor is 10rpm or less and the reverse revolution signal is detected.
  • Page 54 TROUBLESHOOTING Alarm Incorrect Wiring Among Indoor Units Code # This alarm code is indicated only when remote control switch PC-2H2 is used being connected to indoor unit. # This alarm occurs in the case of incorrect connection like that TL terminal is connected to Vc terminal as below when indoor units are wired.
  • Page 55 TROUBLESHOOTING Alarm Compressor Protection Code # This alarm code appears when one of the following alarms occurs three times within 6 hours, which may result in serious compressor damages, if the outdoor unit is continuously operated without removing the cause. Alarm Code: Content of Abnormality Tripping of Protection Device in Outdoor Unit...

  • Page 56: Troubleshooting In Check Mode By Remote Control Switch

    TROUBLESHOOTING 1.2.3 Troubleshooting in Check Mode by Remote Control Switch (PC-P1H) SWING SET TEMP. HIGH ON/OFF TIMER LOUVER G Use the remote control CHECK switch in the following cases. COOL RN HR ADDS HEAT NO FUNCTION UNIT DEFROST (1) When the RUN lamp is flickering. SERVICE ABNML FILTER...
  • Page 57 TROUBLESHOOTING (1) Contents of Check Mode 1 The next indication is shown by pressing the part of “TEMP” switch. If the part of “TEMP” switch is pressed the previous indication is shown. Indication of Category Code Temperature Indication Indication of Temperature, etc. Indoor Unit Temp.
  • Page 58 TROUBLESHOOTING Thermo Temp. of Heating Thermo-ON Alarm Remote Control Cooling Thermo-ON Operation Switch HIGH SWING ON/OFF TIMER SET TEMP. LOUVER COOL Dark ADDS RN HR HEAT NO FUNCTION UNIT DEFROST SERVICE FILTER ABNML CENTRAL AUTO VENT H.STRG T. RUN CHECK Indication on Micro-Computer Input/Output RUN / STOP TEMP.
  • Page 59 TROUBLESHOOTING Compressor Pressure/Frequency Indication Discharge Pressure This is an indication for internal information. (High) (x 0.1 MPa) Suction Pressure This is an indication for internal information. (Low) (x 0.01 MPa) Control Information This is an indication for internal information for the remote control switch.
  • Page 60 TROUBLESHOOTING (2) Contents of Check Mode 2 The latest data of the first three indoor units only connected serially are indicated when more than three indoor units are connected to one remote control switch. By pressing the part of “TEMP” switch, the next display is indicated, If the part of “TEMP”...
  • Page 61 TROUBLESHOOTING Compressor Pressure/Frequency Indication Discharge Pressure Correspond to check mode 1 " ". (High) (x 0.1 MPa) Suction Pressure Correspond to check mode 1 " ". (Low) (x 0.01 MPa) Control Information Correspond to check mode 1 " ". Operating Correspond to check mode 1 "...

  • Page 62: Troubleshooting By 7-Segment Display

    TROUBLESHOOTING 1.2.4 Troubleshooting by 7-Segment Display (1) Checking Method by 7-Segment Display By using the 7-segments and check switch (PSW) on the PCB1 in the outdoor unit, operation conditions and each part of refrigeration cycle, can be checked. 7-Segment G To start checking, press the "PSW2" switch for more than 3 seconds.
  • Page 63 TROUBLESHOOTING from Previous Page Checking Item Checking Contents PSW3 PSW2 -19: Open-Circuited Ambient Air Temperature -19 to 80 (°C) 27: Short-Circuited PSW2 PSW3 (Flicker) PSW3 PSW2 Cause of Stoppage Refer to page 1-61. at Inverter PSW2 PSW3 PSW3 PSW2 Inverter Fin Temperature 00 to 142 (°C) PSW2 PSW3...

  • Page 64: Protection Control Code On 7-Segment Display

    TROUBLESHOOTING 1.2.5 Protection Control Code on 7-Segment Display (1) Protection control code is displayed on 7-segment when a protection control is activated. (2) Protection control code is displayed while function is working, and goes out when released. (3) When several protection control are activated, code number with higher priority will be indicated (see below for the priority order).

  • Page 65: Function Of Leds

    TROUBLESHOOTING 1.2.6 Function of LEDs (1) Printed Circuit Board in Indoor Unit ( * Following figure shows a separated-board type PCB.) RCI Series RPI, RCD and RPC Series PCB1 PCB2 LED4 LED1 LED1 LED3 LED4 LED1 LED3 ■ LED Functions on Indoor Unit Printed Circuit Board for Control Part Name Contents of Functions Remarks...
  • Page 66 TROUBLESHOOTING (2) Printed Circuit Board in Outdoor Unit PCB for Outdoor Unit LED2 LED1 LED3 ■ Dip Switches and LED Functions on Outdoor Unit Printed Circuit Boards Name of Internal Part Name Contents of Functions Circuit Board Controlling Board: LED1 Power Source for PCB1 PCB1 (Red)

  • Page 67: Procedure Of Checking Each Main Parts

    TROUBLESHOOTING Procedure of Checking Each Main Parts 1.3.1 Self-Checking of PCBs using Remote Control Switch The following troubleshooting procedure is utilized for function test of PCBs in the indoor unit and outdoor unit. RUN/STOP SWING SET TEMP. HIGH ON/OFF TIMER LOUVER COOL Press...
  • Page 68 TROUBLESHOOTING from previous page In case that there is a second unit. TEMP CHECK <Self-checking Indication of the Next Unit> Press (ex.) Repetition of Self-checking of Unit No. "0". Indication of ADDS. RN Unit No. "1" After 7 Seconds Result After 1 to 5 Seconds After 1 Second Repetition...

  • Page 69: Self-Checking Of Remote Control Switch

    TROUBLESHOOTING 1.3.2 Self-Checking of Remote Control Switch Cases where CHECK switch is utilized. 1. If the remote control switch readouts malfunction. 2. For regular maintenance check. Changing of LCD Indication Indicating Only for Turn ON the power source. LCD Indication Period cancellation (sec.)
  • Page 70 TROUBLESHOOTING The LCD indication changes as shown below. The detected temperature of remote control thermostat is indicated at the part (A) in the figure below. If the number "- -" or "FF" is indicated at the (A) part, the remote control thermostat is abnormal. In case of depressing the RESET switch or The LCD indication changes as leaving the switches for 15 seconds, the data...

  • Page 71: Procedure Of Checking Other Main Parts

    TROUBLESHOOTING 1.3.3 Procedure of Checking Other Main Parts (1) High Voltage Discharge Work for Replacing Parts <Perform this high voltage discharge work to avoid an electric shock.> [Procedure] (a) Check to ensure that no high voltage exists. If LED201 is ON after start-up and LED201 is OFF after turning OFF the power source, the voltage will decrease lower than DC50V.
  • Page 72 TROUBLESHOOTING (2) Checking Procedures ISPM Rectification Parts of Internal Circuit of ISPM (Common) Remove all the terminals of the ISPM before check. If items (a) to (h) are performed and the results are satisfactory, ISPM is normal. Measure it under 1 kΩ range of a tester. Do not use a digital tester.
  • Page 73 TROUBLESHOOTING (e) By touching the + side of the tester to the P terminal PC208 PC207 of ISPM and the - side of the tester to U, V and W of CN207 CN206 ISPM, measure the resistance. If all the resistances R201 are more than 100 kΩ, it is normal.
  • Page 74 TROUBLESHOOTING Active Parts of Internal Circuit of ISPM (for 3 and 4HP) P1 PB If item (i) to (m) are performed and the results are satisfactory, ISPM is normal. Measure it under 1 kΩ range of a tester. Do not use a digital tester. (i) Perform the item (a) to (h).
  • Page 75 TROUBLESHOOTING (3) Checking Procedures ACT Module (for 5HP only) Outer Appearance and Internal Circuit of ACT Module Power Factor Control Remove all the terminals of the ACT module before check. If items (a) to (f) are performed and the results are satisfactory, the ACT module is normal. Measure it under 1 kΩ...
  • Page 76 TROUBLESHOOTING (e) By touching the - side of the tester to the L2 terminal of ACT module and the + side of the tester to the I terminal of ACT module, measure the resistance. If all the resistances are greater than 100 kΩ, it is normal.

  • Page 78: Servicing

    SERVICING SERVICING Outdoor Unit TURN OFF all power source switches. 2.1.1 Removing Service Cover Remove the main parts according to the following procedures. To reassemble perform the procedures in reverse. To prevent contamination of the refrigerant with water or foreign particles, do not expose open to atmosphere for long periods.

  • Page 79: Removing Outdoor Fan

    SERVICING TURN OFF all power source switches. 2.1.3 Removing Outdoor Fan (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) Remove the air outlet grille according to the item 2.1.2 “Removing Air Outlet Grille”. (3) Remove the fans by removing the cap nuts and the flat washers fixing the propeller fans onto the motor shaft.

  • Page 80: Removing Compressor

    SERVICING TURN OFF all power source switches. 2.1.5 Removing Compressor (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. If the outdoor unit is installed close to a wall, disconnect the refrigerant pipe and move the outdoor unit away from the wall.
  • Page 81 SERVICING TURN OFF all power source switches. (6) Disconnect the suction pipe from the compressor. (7) Disconnect the discharge pipe from the compressor by using two spanners. (8) Remove the two (2) nuts fixing the compressor and remove the compressor by lifting. (a) Check to ensure that the faston terminals of the wires is normal.

  • Page 82: Removing High Pressure Switch And Pressure Switch For Control

    SERVICING TURN OFF all power source switches. 2.1.6 Removing High Pressure Switch and Pressure Switch for Control (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) Remove the nine (9) M5 screws fixing the rear cover and the five (5) M5 screws fixing the pipe rear cover.

  • Page 83: Removing Coil For Reversing Valve

    SERVICING TURN OFF all power source switches. 2.1.7 Removing Coil for Reversing Valve Do not touch the electrical parts when LED201 (Red) on the ISPM is lit to prevent from an electrical shock. (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) G RAS-3HVRG and 4HVRG (a) Remove three (3) screws fixing the power plate and turn the one toward the front side.

  • Page 84: Removing Coil For Expansion Valve

    SERVICING TURN OFF all power source switches. 2.1.8 Removing Coil for Expansion Valve Do not touch the electrical parts when LED201 (Red) on the ISPM is lit to prevent from an electrical shock. (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) Remove the three (3) screws fixing the electrical box and turn the power plate toward the front side as shown in the item 2.1.7 “Removing Coil for Reverse Valve”.

  • Page 85: Removing Printed Circuit Board (Pcb1)

    SERVICING TURN OFF all power source switches. 2.1.9 Removing Printed Circuit Board (PCB1) Do not touch the electrical components. When handling the PCB1, take care of not to use excessive force as this will cause damage. (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) Disconnect all the connectors connected to the PCB1.

  • Page 86: Removing Ispm And Act Module

    SERVICING TURN OFF all power source switches. 2.1.10 Removing ISPM and ACT Module Do not touch the electrical parts when LED201 (Red) on the ISPM is lit to prevent from an electrical shock. (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) Remove the three (3) screws fixing the electrical box and turn the power plate toward the front side.
  • Page 87 SERVICING TURN OFF all power source switches. (3) Disconnect all wires connecting to the ISPM. G Disconnect CN201, CN202, PCN201, PCN202 (Wire for Fan Motor) G Disconnect CN203, CN204, CN206, CN101 (5HVRG only) G Disconnect RB, N, P, P1 and R, S, U, V, W on the terminal board and the faston terminal TB3 of ISPM.

  • Page 88: Removing Electrical Components

    SERVICING TURN OFF all power source switches. 2.1.11 Removing Electrical Components Do not touch the electrical parts when LED201(Red) is on the ISPM is lit to prevent from an electrical shock. (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. (2) Remove three (3) screws fixing the electrical box and turn the power plate toward the front side.

  • Page 90: Main Parts

    MAIN PARTS MAIN PARTS Inverter 3.1.1 Specifications of Inverter Applicable Model RAS-3HVRG, RAS-4HVRG, RAS-5HVRG Applicable Power Source 1 Phase, 220V, 240V 50Hz/220V 60 Hz Output Voltage (Maximum) 200V, 3 Phase Output Current (Maximum) 14.5/16/24.5 (3HVRG/4HVRG/5HVRG) Control Method Vector Control Range Output Frequency 25 to 115Hz Accuracy of Frequency 0.01Hz at Applicable Frequency Range...

  • Page 91: Arrangement Of Inverter Power Unit

    MAIN PARTS 3.1.2 Arrangement of Inverter Power Unit RAS-3HVRG and RAS-4HVRG RAS-5HVRG LED201 (Red) LED201 (Red) Reactor Fuse Magnetic Capacitor Power Plate Noise Filter Contactor Capacitor Magnetic Contactor Fuse Power Plate Noise Filter Reactor Parts Model Fin (mm) ISPM HS17A1F06 (3HP and 4HP), HF30A1F06 (5HP) ACT Module LACT33020B...

  • Page 92: Ac Chopper

    MAIN PARTS AC Chopper Reduction of Electromagnetic Sound Fan Motor Control by AC Chopper: Lower electromagnetic sound and vibration have been achieved by AC Chopper control than thyristor control. AC Chopper Control Concept of Fan Speed Control The voltage applied to the fan motor is controlled by chopping (ON/OFF) the power supply voltage at a frequency of 20kHz.
  • Page 93 MAIN PARTS (2) Structure a. 2.1A (For Indoor Units: RCD, RPC and RPI (2.5HP) Models) CAUTION CN201 b. 5.6A (For Indoor Units: RPI (3.0 to 5.0HP) Models) (3) Circuit Diagram (Outline) a. 2.1A PCN202 PCN201 AC220-240V (From Control PCB) CN201 PCN203 Input Duty Signal PCN204...

  • Page 94: Auto-Louver Mechanism

    MAIN PARTS Auto-Louver Mechanism 3.3.1 4-Way Cassette Type (1) Auto-Louver Operation The louvers of the optional air panel with auto-louver swing simultaneously by four drive motor. The parts of the auto-louver mechanism are shown below. The motor (1) is installed to the louver directly.

  • Page 95: 2-Way Cassette Type

    MAIN PARTS 3.3.2 2-Way Cassette Type (1) Auto-Louver Operation The louvers of the optional air panel with auto-louver swing simultaneously by a drive motor. The parts of the auto-louver mechanism are shown below. Stopper Bearing Louver Bearing Shaft B Stopper Stopper AS Motor Assembly Crank...

  • Page 96: Ceiling Type

    MAIN PARTS 3.3.3 Ceiling Type (1) Auto-Louver Operation The louvers of the optional air panel with auto- louver swing simultaneously by a drive motor. (1) AS Motor The parts and the principle of the auto-louver mechanism are shown in the right figure. (2) Pinion The AS motor (1) rotates, the pinion (2) fixed to the shaft of the AS motor (1) rotates, the rotating...

  • Page 97: Scroll Compressor

    MAIN PARTS Scroll Compressor 3.4.1 Reliable Mechanism for Low Vibration and Low Sound (1) The rotating direction is definite. (2) The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is C to 110 3.4.2 Principle of Compression (1) The gas is inhaled from the inlet port at the outer frame of the fixed scroll.

  • Page 98: Thermistor

    MAIN PARTS Thermistor 3.5.1 Thermistor for Indoor Unit (1) Position of Thermistor (In Case of 4-Way Cassette Type) Thermistor for Indoor Heat Exchanger Gas Pipe Temperature (THM5) Thermistor for Air Outlet Thermistor for Temperature Thermistor for Indoor Heat Air Inlet Temperature (THM2) Exchanger Liquid Pipe (THM1)

  • Page 99: Thermistor For Outdoor Unit

    MAIN PARTS 3.5.2 Thermistor for Outdoor Unit (1) Position of Thermistor Thermistor for Outdoor Ambient Temperature Thermistor for Discharge Gas Temperature Thermistor for Evaporating Temperature (2) Thermistor for Upper Part Temperature of Compressor (For Prevention of Discharge Gas Overheating) a. A thermistor for the upper part temperature R25 = 200kΩ...
  • Page 100 MAIN PARTS d. If compressor upper part temperature increases excessively, the protection control is activated and the compressor is stopped according to the following method. Operation Upper Part Temperature of Compressor Defecting Period Cooling Over 127 10 minutes (Continuously) Over 140 5 seconds (Continuously) Heating Over 120...

  • Page 101: Electronic Expansion Valve

    MAIN PARTS Electronic Expansion Valve 3.6.1 Electronic Expansion Valve for Outdoor Units Micro-Computer Pulse Motor Pulse Signal 2-Phase Permanent Magnetic Pulse Motor Control 0 to 500 Pulse by 1 Pulse Refrigerant Flow Control Precise Control Needle Specifications Items Specifications Type EKV Series or CAM Series Refrigerant Used R22 or R407C...

  • Page 102: Electronic Expansion Valve For Indoor Units

    MAIN PARTS 3.6.2 Electronic Expansion Valve for Indoor Units Magnet Micro-Computer Coil Pulse Signal Pulse Motor 2-Phase Permanent Magnetic Pulse Motor Control 0 to 2,000 Pulse by 1 Pulse Gear Refrigerant Flow Control Driver Precise Control Bellows Valve Specifications Items Specifications Type EDM Type...

  • Page 103: High Pressure Switch And Pressure Switch For Control

    MAIN PARTS High Pressure Switch and Pressure Switch for Control (1) High Pressure Switch (for Protection) When the discharge pressure reaches 3.3Mpa, compressor is stopped to protect the refrigerant cycle components. (2) Pressure Switch for Control When the discharge pressure reaches 2.75MPa during heating operation, gas by-pass control or fan control are performed.

  • Page 104: Field Work Instruction

    FIELD WORK INSTRUCTION FIELD WORK INSTRUCTION Overheating in Case of Using PC-5H Question and Answer for Field Work Example 1: Overheating in Case of Using PC-5H [Phenomenon] After test run, indoor temperature increases more than 30 C even if the setting temperature is 20 [Cause] Test running is performed from the outdoor unit, the operation mode at the test running is memorized.

  • Page 105: Alarm 36

    FIELD WORK INSTRUCTION Alarm 36 Question and Answer for Field Work Example 2: Alarm 36 [Phenomenon] Alarm code “36” appeared and the system didn’t operate. [Cause] Combination of the indoor unit and outdoor unit was wrong. [Countermeasure] Check an applicable unit model code as shown below. Outdoor Unit Indoor Unit <DC Inverter UTOPIA>...

  • Page 106: Select Guide Of Drain Pipe For Indoor Unit

    FIELD WORK INSTRUCTION Select Guide of Drain Pipe for Indoor Unit G Selecting Method of Drain Pipe Diameter <Step 1> Calculation of Drain Flow Volume Calculate from that the drain flow volume is approximately 3 [l/hr] per 1HP of the indoor unit nominal capacity.

  • Page 107: Maintenance Work

    FIELD WORK INSTRUCTION Maintenance Work (1) For Indoor Unit and Outdoor Unit (a) Fan and Fan Motor G Lubrication - All fan motors are pre-lubricated and sealed at the factory. Therefore, no lubricating maintenance is required. G Sound and Vibration - Inspect for abnormal sound and vibration. G Rotation - Inspect for clockwise rotation and rotating speed.

  • Page 110: Service & Maintenance Record

    FIELD WORK INSTRUCTION Service & Maintenance Record Service & Maintenance Record Check Item Action Judgement YES or NO Is service space sufficient? YES or NO Short Circuit of Discharge Air? YES or NO Any Heat Influence YES or NO Is earth wire connected? Refrigeration Piping GOOD or NOT GOOD Fixing of Units...
  • Page 112 Specifications in this catalog are subject to change without notice, in order that HITACHI may bring the latest innovations to their customers. Catalog No. P5413554 2003 Printed in Japan (N)
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This manual is also suitable for:

Utopia rpi-4.0hrgUtopia rpi-3.0hrgUtopia rpi-5.0hrgUtopia rci-2.5hrgUtopia rci-4.0hrgUtopia rci-3.0hrg ... Show all

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