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Mitsubishi Electric PUHY-RP200 Service Handbook

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2010
AIR CONDITIONER
Service Handbook
Service Handbook
Model
PUHY-RP200, RP250, RP300, RP350YJM-A
PUHY-RP400, RP450, RP500, RP550, RP600, RP650YSJM-A
PUHY-RP700, RP750, RP800, RP850, RP900YSJM-A

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  Summary of Contents for Mitsubishi Electric PUHY-RP200

  • Page 1 2010 AIR CONDITIONER Service Handbook Service Handbook Model PUHY-RP200, RP250, RP300, RP350YJM-A PUHY-RP400, RP450, RP500, RP550, RP600, RP650YSJM-A PUHY-RP700, RP750, RP800, RP850, RP900YSJM-A...
  • Page 2: Safety Precautions

    Safety Precautions ŒBefore installing the unit, thoroughly read the following safety precautions. ŒObserve these safety precautions for your safety. WARNING This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid the risk of serious injury or death.
  • Page 3 WARNING Securely attach the terminal block cover (panel) to the After completing the service work, check for a gas unit. leak. If the terminal block cover (panel) is not installed properly, If leaked refrigerant is exposed to a heat source, such as a dust and/or water may infiltrate and pose a risk of electric fan heater, stove, or electric grill, poisonous gases may be shock, smoke, and/or fire.
  • Page 4 Precautions for handling units for use with R410A CAUTION Use refrigerant piping made of phosphorus deoxidized Prepare tools for exclusive use with R410A. Do not use copper and copper alloy seamless pipes and tubes. In the following tools if they have been used with the con- addition, be sure that the inner and outer surfaces and ventional refrigerant (gauge manifold, charging hose, the end faces of the existing and new pipes are clean...
  • Page 5: Before Installing The Unit

    Before installing the unit WARNING Do not install the unit where a gas leak may occur. When installing the unit in a hospital, take appropriate measures to reduce noise interference. If gaseous refrigerant leaks and piles up around the unit, it may be ignited.
  • Page 6 Before installing the unit (moving and reinstalling the unit) and performing electrical work CAUTION Properly ground the unit. Periodically check the installation base for damage. Do not connect the grounding wire to a gas pipe, water pipe, If the unit is left on a damaged platform, it may fall and lightning rod, or grounding wire from a telephone pole.
  • Page 7 Before the test run CAUTION Turn on the unit at least 12 hours before the test run. Do not operate the unit without panels and safety guards. Keep the unit turned on throughout the season. If the unit is turned off in the middle of a season, it may result in malfunc- Rotating, high-temperature, or high-voltage parts on the unit tions.
  • Page 8: Table Of Contents

    CONTENTS I Read Before Servicing [1] Read Before Servicing......................3 [2] Necessary Tools and Materials ....................4 [3] Storage of Piping ........................5 [4] Pipe Processing........................5 [5] Brazing............................6 [6] Air Tightness Test........................7 [7] Vacuum Drying (Evacuation) ....................8 [8] Refrigerant Charging ........................
  • Page 9 HWE10010...
  • Page 10: Read Before Servicing

    I Read Before Servicing [1] Read Before Servicing ....................... 3 [2] Necessary Tools and Materials..................4 [3] Storage of Piping ....................... 5 [4] Pipe Processing ......................... 5 [5] Brazing..........................6 [6] Air Tightness Test ......................7 [7] Vacuum Drying (Evacuation) ..................... 8 [8] Refrigerant Charging......................
  • Page 11 - 2 -...
  • Page 12: Read Before Servicing

    [ I Read Before Servicing ] I Read Before Servicing [1] Read Before Servicing 1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Multi air conditioner for building application REPLACE MULTI YJM-A series R410A 2.
  • Page 13: Necessary Tools And Materials

    [ I Read Before Servicing ] [2] Necessary Tools and Materials Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C) 1.
  • Page 14: Storage Of Piping

    [ I Read Before Servicing ] [3] Storage of Piping 1. Storage location Store the piping materials indoors until they are ready to be installed (e.g., storage room on site or at the installer's premise). If left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe, resulting in malfunctions. 2.
  • Page 15: Brazing

    [ I Read Before Servicing ] [5] Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection Use of oxidized solder for brazing Use of non-oxidized solder for brazing 1.
  • Page 16: Air Tightness Test

    [ I Read Before Servicing ] [6] Air Tightness Test No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed ŒPressurize the system with nitrogen to the design pressure (REPLACE MULTI Y(PUHY-RP): 3.3 MPa [479 psi];...
  • Page 17: Vacuum Drying (Evacuation)

    [ I Read Before Servicing ] [7] Vacuum Drying (Evacuation) (Photo1) 15010H (Photo2) 14010 Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.
  • Page 18: Refrigerant Charging

    [ I Read Before Servicing ] [8] Refrigerant Charging Cylinder with a siphon Cylinder without a siphon Cylin- Cylin- Cylinder color R410A is pink. Refrigerant charging in the liquid state Valve Valve liquid liquid 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22.
  • Page 19: Characteristics Of The Conventional And The New Refrigerants

    [ I Read Before Servicing ] [10] Characteristics of the Conventional and the New Refrigerants 1. Chemical property As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant. However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.
  • Page 20: Notes On Refrigerating Machine Oil

    [ I Read Before Servicing ] [11] Notes on Refrigerating Machine Oil 1. Refrigerating machine oil in the HFC refrigerant system HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system. Note that the ester oil used in the system has properties that are different from commercially available ester oil. Refrigerant Refrigerating machine oil Mineral oil...
  • Page 21 [ I Read Before Servicing ] HWE10010 - 12 -...
  • Page 22: Restrictions

    II Restrictions [1] System configuration ....................... 15 [2] Types and Maximum allowable Length of Cables ............16 [3] Switch Settings and Address Settings ................22 [4] Sample System Connection..................... 29 [5] An Example of a System to which an MA Remote Controller is connected..... 30 [6] An Example of a System to which an ME Remote Controller is connected.....
  • Page 23 - 14 -...
  • Page 24: System Configuration

    [ II Restrictions ] II Restrictions [1] System configuration 1. Table of compatible indoor units The table below summarizes the types of indoor units that are compatible with different types of outdoor units. (1) Standard combinations Outdoor Composing units Maximum total capacity Maximum number Types of connectable in- units...
  • Page 25: Types And Maximum Allowable Length Of Cables

    [ II Restrictions ] [2] Types and Maximum allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- ual. 2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference. (Do not put the control cable and power supply cable in the same conduit tube.) 3) Provide grounding for the outdoor unit as required.
  • Page 26 [ II Restrictions ] 2) Remote controller wiring MA remote controller ME remote controller Type Number of 2-core cable 2-core cable cores Cable type 2 *3 2 *3 0.3 to 1.25mm 0.3 to 1.25mm [AWG22 to 16] [AWG22 to 16] Cable size (0.75 to 1.25mm (0.75 to 1.25mm...
  • Page 27 [ II Restrictions ] (3) Reusability check of the existing transmission lines for Replace Multi units Check the existing wires for damage to insulation by measuring the resistance between the lead and the ground with a 500 V ohmmeter. If the insulation resistance is less than 100 M , replace the wires. Use the flowcharts on the following pages to determine the reusability of the existing transmission lines.
  • Page 28 [ II Restrictions ] Reusability of MA remote controller wiring Reusability of M-NET remote controller witing Please contact MITSUBISHI Please contact MITSUBISHI Is the shielded Is the shielded ELECTRIC. ELECTRIC. wiring used? wiring used? Refer to Table A. Refer to Table A. Handle the non-using wiring as Handle the non-using wiring as Is the 2-core cable used?
  • Page 29 [ II Restrictions ] Reusability of Transmission line Please contact MITSUBISHI Is the shielded wiring used? ELECTRIC. Is the current in normal state without Fix the ground fault current. ground fault? Farthest transmission line of Is the farthest transmission line between OU and centralized controller must be less IU less than 200m? than 200m.
  • Page 30 [ II Restrictions ] Diagram B Checking the cable size MA remote controller 1.25mm 0.75mm 0.5mm 0.3mm Number of indoor units M-NET remote controller 1.25mm 0.75mm 0.5mm 0.3mm Number of indoor units HWE10010 - 21 -...
  • Page 31: Switch Settings And Address Settings

    [ II Restrictions ] [3] Switch Settings and Address Settings 1. Switch setting Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work. Set the switches while the power is turned off.
  • Page 32 [ II Restrictions ] 2. M-NET Address settings (1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. Unit or controller Address setting Setting method Facto- range ry set- ting CITY MULTI in- Main/sub unit...
  • Page 33 [ II Restrictions ] (2) Power supply switch connector connection on the outdoor unit (Factory setting: The male power supply switch connector is connected to CN41.) System configu- Connection to Power supply unit Group operation Power supply switch connector connection ration the system con- for transmission...
  • Page 34 [ II Restrictions ] (6) Miscellaneous settings Cooling-only setting for the indoor unit: Cooling only model (Factory setting: SW3-1 "OFF.") When using indoor unit as a cooling-only unit, set SW3-1 to ON. (7) Various types of control using input-output signal connector on the outdoor unit (various connection options) Terminal Type Usage...
  • Page 35 [ II Restrictions ] Example of wiring connection (1) CN51 (2) CN3S Outdoor unit Relay circuit Adapter 2 control board Distant control Relay circuit Adapter 1 board Outdoor unit CN3S control board CN51 Preparations in the field Maximum cable Preparations length is 10m Maximum cable in the field...
  • Page 36 [ II Restrictions ] 1. Demand control (1) General outline of control Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the outdoor units (OC, OS1, and OS2). Between 2 and 12 steps of demand control is possible by setting DIP SW4-4 on the outdoor units (OC, OS1, and OS2). Table.1 DipSW4-4 Demand control switch...
  • Page 37 [ II Restrictions ] 3) 8-step demand control (When SW4-4 is set to ON on two outdoor units) Demand capacity is shown below. 8-step demand No.2 CN3D 1-2P Open Short-circuit No.1 CN3D 1-2P 1-3P Open Short-circuit Open Short-circuit Open Open 100% Short-circuit Short-circuit...
  • Page 38: Sample System Connection

    [ II Restrictions ] [4] Sample System Connection Examples of typical system connection are shown on pages [5] to [7]. Refer to the Installation Manual that came with each device or controller for details. (1) An example of a system to which an MA remote controller is connected System Address start up for in- Connection to the system controller...
  • Page 39: An Example Of A System To Which An Ma Remote Controller Is Connected

    [ II Restrictions ] [5] An Example of a System to which an MA Remote Controller is connected 1. System with one outdoor unit (automatic address setup for both indoor and outdoor units) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male...
  • Page 40 [ II Restrictions ] MA remote controller function selection or the installation (4) Wiring method manual for the MA remote controller for the setting meth- 1) Indoor/outdoor transmission line od.) Daisy-chain terminals M1 and M2 on the terminal block Group operation of indoor units for indoor-outdoor transmission line (TB3) on the outdoor To perform a group operation of indoor units (IC), daisy- units (OC, OS1, OS2) (Note), and terminals M1 and M2...
  • Page 41 [ II Restrictions ] 2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected (manual address setup for both indoor and outdoor units) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male...
  • Page 42 [ II Restrictions ] 4) LOSSNAY connection (4) Wiring method Connect terminals M1 and M2 on the terminal block 1) Indoor/outdoor transmission line (TB5) on the indoor unit (IC) to the appropriate terminals Same as [5] 1. on the terminal block (TB5) on LOSSNAY (LC). (Non-po- Shielded cable connection larized two-wire) ŒInterlock setting between the indoor units and LOSS-...
  • Page 43 [ II Restrictions ] 3. Group operation of units in a system with multiple outdoor units (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male Group Group Group from CN41 to CN40. connector on connector on SW2-1 OFF...
  • Page 44 [ II Restrictions ] ŒOnly use shielded cables. (4) Wiring method Shielded cable connection 1) Indoor/outdoor transmission line Daisy-chain the S terminal on the terminal block (TB7) on Same as [5] 1. the outdoor units (OC, OS1, OS2) with the shield wire of ŒOnly use shielded cables.
  • Page 45 [ II Restrictions ] 4. A system in which a system controller is connected to the transmission line for centralized control and which is pow- ered from an outdoor unit (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male...
  • Page 46 [ II Restrictions ] Shielded cable connection (4) Wiring method Daisy-chain the S terminal on the terminal block (TB7) on 1) Indoor/outdoor transmission line the outdoor units (OC, OS1, OS2) with the shield wire of Same as [5] 1. the shielded cable. Short-circuit the earth terminal ( and the S terminal on the terminal block (TB7) on the out- Only use shielded cables.
  • Page 47 [ II Restrictions ] 5. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except LM adapter) (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 48 [ II Restrictions ] Set the central control switch (SW2-1) on the control (4) Wiring method board of all outdoor units to "ON." 1) Indoor/outdoor transmission line ŒOnly use shielded cables. Daisy-chain terminals M1 and M2 on the terminal block Shielded cable connection for indoor-outdoor transmission line (TB3) on the outdoor Daisy-chain the S terminal on the terminal block (TB7) on...
  • Page 49: An Example Of A System To Which An Me Remote Controller Is Connected

    [ II Restrictions ] [6] An Example of a System to which an ME Remote Controller is connected (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40. connector on connector on SW2-1 OFF ON...
  • Page 50 [ II Restrictions ] When 2 remote controllers are connected to the sys- (4) Wiring method 1) Indoor/outdoor transmission line Refer to the section on Switch Setting. Same as [5] 1. Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).
  • Page 51: An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected

    [ II Restrictions ] [7] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected (1) Sample control wiring Leave the male Leave the male Move the male connector connector on connector on Group from CN41 to CN40.
  • Page 52 [ II Restrictions ] Same as [5] 1. (4) Wiring method Group operation of indoor units 1) Indoor/outdoor transmission line Same as [5] 1. Same as [5] 1. 4) ME remote controller wiring Shielded cable connection Same as [6] Same as [5] 1. When 2 remote controllers are connected to the sys- 2) Transmission line for centralized control Same as [5] 4.
  • Page 53: Restrictions On Pipe Length

    1. Determining the reusability of the existing piping Mitsubishi Electric Corporation cannot be held responsibility for the problems arising from the use of the existing pipes. Before installing the new air conditioning system, the existing piping system must be checked for refrigerant gas leaks, strength (ma- terial/thickness), and for corrosion.
  • Page 54 [ II Restrictions ] CAUTION Charge refrigerant in the liquid state. ŒIf gaseous refrigerant is drawn out of the cylinder first, the composition of the refrigerant in the cylinder will change and become unsuitable for use. It will also lead to performance loss. CAUTION Store the piping materials indoors, and keep both ends of the pipes sealed until immediately before brazing.
  • Page 55 Do not reuse such pipes. Is the existing unit Is the refrigerant oil SUNISO, MS, Mitsubishi Electric unit? Barrel Freeze, HAB or Freol? Is the capacity of new replacement unit the same as that The vertical height...
  • Page 56 15 [49] or less 1) Maximum allowable piping length depends on the total amount of refrigerant in a given system. Use the formulas below to calculate the maximum length. PUHY-RP200 - RP250YJM: 0.29 × L + 0.2 × L + 0.12 × L + 0.06 ×...
  • Page 57 [ II Restrictions ] RP400, RP450, RP500, RP550 models If the piping length between the branch pipe and the Outdoor unit outdoor unit exceeds 2 m [6 ft] , provide a trap on the piping (gas piping only) within 2 m [6 ft] of the branch Outdoor unit (Note1) Install the pipe that connects the branch pipe and the outdoor units in pipe to prevent the refrigerant oil from accumulating in...
  • Page 58 [ II Restrictions ] RP600, RP650 models If the piping length between the branch pipe and the Outdoor unit outdoor unit exceeds 2 m [6 ft] , provide a trap on the piping (gas piping only) within 2 m [6 ft] of the branch Outdoor unit pipe to prevent the refrigerant oil from accumulating in (Note1)
  • Page 59 [ II Restrictions ] RP700, RP750, RP800, RP850, RP900 models Outdoor unit Outdoor unit If the piping length between the branch pipe and the outdoor unit exceeds 2 m [6 ft] , provide a trap on the Outdoor unit piping (gas piping only) within 2 m [6 ft] of the branch (Note1) Install the pipe that connects the branch pipe and the outdoor units in pipe to prevent the refrigerant oil from accumulating in the piping and causing compressor damage.
  • Page 60 1) The maximum allowable piping length for the RP650 through RP900 models is 250 m [820 ft]. Observe the piping length limitation imposed by the refrigerant amount as calculated with the formula below. PUHY-RP200 - RP250YJM: 0.39 × L + 0.29 × L + 0.2 ×...
  • Page 61 [ II Restrictions ] 3. Refrigerant pipe size (1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size) Unit: (mm) [inch] Outdoor unit set name (total capacity) Liquid pipe size Gas pipe size RP200 model RP250 model ø12.7 [1/2"]...
  • Page 62 [ II Restrictions ] (3) Size of the refrigerant pipe between the branches for connection to indoor units Unit: (mm) [inch] Total capacity of the downstream units Liquid pipe Gas pipe - 80 ø9.52 [3/8"] ø15.88 [5/8"] 81 - 160 ø19.05 [3/4"] ø12.7 [1/2"] 161 - 330...
  • Page 63 [ II Restrictions ] HWE10010 - 54 -...
  • Page 64: Outdoor Unit Components

    III Outdoor Unit Components [1] Outdoor Unit Components and Refrigerant Circuit ............57 [2] Control Box of the Outdoor Unit..................59 [3] Outdoor Unit Circuit Board....................60 HWE10010 - 55 -...
  • Page 65 - 56 -...
  • Page 66: Outdoor Unit Components And Refrigerant Circuit

    [ III Outdoor Unit Components ] III Outdoor Unit Components [1] Outdoor Unit Components and Refrigerant Circuit 1. Front view of an outdoor unit (1) PUHY-RP200, RP250, RP300, RP350YJM-A Fan guard Control box Heat exchanger Compressor cover Fin guards Front panel...
  • Page 67 [ III Outdoor Unit Components ] 2. Refrigerant circuit (1) PUHY-RP200, RP250, RP300, RP350YJM-A Check valve(CV1) High-pressure sensor (63HS1) Solenoid valve(SV1b) High-pressure switch (63H1) 4-way valve(21S4b) Oil tank (top)/ Refrigerant oil 4-way valve(21S4a) collector (bottom) Solenoid valve(SV3) Low-pressure sensor (63LS)
  • Page 68: Control Box Of The Outdoor Unit

    [ III Outdoor Unit Components ] [2] Control Box of the Outdoor Unit <HIGH VOLTAGE WARNING> Control box houses high-voltage parts. When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
  • Page 69: Outdoor Unit Circuit Board

    [ III Outdoor Unit Components ] [3] Outdoor Unit Circuit Board 1. Outdoor unit control board CN332 CNDC Serial communication signal input CN801 Output 18VDC Bus voltage input GND (INV board) Pressure switch Output 17VDC (Fan board) connection Serial communication signal output CNAC2 driving output LED1...
  • Page 70 [ III Outdoor Unit Components ] 2. M-NET board CNS2 CNIT Transmission line input/output for 12VDC input CN04 centralized control system CN102 Bus voltage input 5VDC input Power supply output for centralized control system Power supply detection output Indoor/outdoor transmission line input/output Power supply ON/OFF Grounding signal input...
  • Page 71 [ III Outdoor Unit Components ] 3. INV board SC-P1 Rectifier diode output (P) Open: No-load operation setting CN5V RSH1 SC-P2 Short-circuited: Normal setting LED1 Overcurrent detection Bus voltage Input(P) Lit: Inverter in normal operation 5VDC output resistor Blink: Inverter error GND(Fan Board) Serial communication signal output...
  • Page 72: Fan Board

    [ III Outdoor Unit Components ] 4. Fan board LED3 CN18V Lit during normal Input 18VDC Serial communication signal output CPU operation GND(Control board) Serial communication signal output CN21 Serial communication signal output GND(INV board) CNVDC Input 17VDC Bus voltage input CN22 GND(INV board) Input 5VDC...
  • Page 73 [ III Outdoor Unit Components ] 5. Noise Filter Output Output (Rectified L2-N current) (Rectified L2-N current) Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding F1,F2,F3,F4 Fuse 250VAC 6.3A Output Grounding CN1A Input CN1B TB21 TB22 TB23 TB24 Input Input/output(L1)
  • Page 74: Remote Controller

    IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers ........67 [2] Group Settings and Interlock Settings via the ME Remote Controller ......68 [3] Interlock Settings via the MA Remote Controller ............. 72 [4] Using the built-in Temperature Sensor on the Remote Controller ........73 HWE10010 - 65 -...
  • Page 75 - 66 -...
  • Page 76: Functions And Specifications Of Ma And Me Remote Controllers

    [ IV Remote Controller ] IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers There are two types of remote controllers: ME remote controller, which is connected on the indoor-outdoor transmission line, and MA remote controller, which is connected to each indoor unit. 1.
  • Page 77: Group Settings And Interlock Settings Via The Me Remote Controller

    [ IV Remote Controller ] [2] Group Settings and Interlock Settings via the ME Remote Controller 1. Group settings/interlock settings Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the indoor/outdoor unit address.
  • Page 78 [ IV Remote Controller ] Repeat steps in the previous page to interlock all the indoor units in a group with the LOSSNAY unit. (C) To return to the normal display When all the group settings and interlock settings are made, take the To go back to the normal display, To search for an address, follow step...
  • Page 79 [ IV Remote Controller ] (A) To delete group settings (B) To delete interlock settings <Successful completion of deletion> If deletion is successfully completed, will appear in the unit type display window. If the deletion fails, will (Displayed alternately) will be displayed in the room temperature display window. appear in the unit type display - If a transmission error occurs, the selected setting will not be window.
  • Page 80 [ IV Remote Controller ] [Operation Procedures] 1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal display). 2. Press buttons [CHECK] and [ ] simultaneously for 2 seconds to go into the “Skip-Auto-Mode setting.”...
  • Page 81: Interlock Settings Via The Ma Remote Controller

    [ IV Remote Controller ] [3] Interlock Settings via the MA Remote Controller 1. LOSSNAY interlock setting (Make this setting only when necessary.) * When the upper controller is connected, make the setting using the upper controller. NOTE: When using LOSSNAY units in conjunction, interlock the addresses of all indoor units within the group and address of LOSSNAY units. Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to search and delete registered information.
  • Page 82: Using The Built-In Temperature Sensor On The Remote Controller

    [ IV Remote Controller ] < 2. Search Procedures > To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is connected to it. <Indoor unit address>...
  • Page 83 [ IV Remote Controller ] HWE10010 - 74 -...
  • Page 84: Electrical Wiring Diagram

    V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit ..............77 [2] Electrical Wiring Diagram of Transmission Booster............78 HWE10010 - 75 -...
  • Page 85 - 76 -...
  • Page 86: Electrical Wiring Diagram Of The Outdoor Unit

    [ V Electrical Wiring Diagram ] V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit 1. Electrical wiring diagram of the outdoor unit (1) PUHY-RP200, RP250, RP300, RP350 models HWE10010 - 77 -...
  • Page 87: Electrical Wiring Diagram Of Transmission Booster

    [ V Electrical Wiring Diagram ] [2] Electrical Wiring Diagram of Transmission Booster Terminal block for power supply (TB1) 250V 5A Red Red Red Black White White Green/Yellow 100V/200VAC Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply Blue Black...
  • Page 88: Refrigerant Circuit

    VI Refrigerant Circuit [1] Refrigerant Circuit Diagram ..................... 81 [2] Principal Parts and Functions ..................82 HWE10010 - 79 -...
  • Page 89 - 80 -...
  • Page 90: Refrigerant Circuit Diagram

    [ VI Refrigerant Circuit ] VI Refrigerant Circuit [1] Refrigerant Circuit Diagram 1. Outdoor unit (1) PUHY-RP200 model 63H2 63HS1 63H1 21S4a 21S4b SV1b HEX AIR Oil Tank HEX REF Mineral Oil Collection tank SV1a LEV1 63LS COMP SLEV SV5b...
  • Page 91: Principal Parts And Functions

    [ VI Refrigerant Circuit ] [2] Principal Parts and Functions 1. Outdoor unit Part Symbols Notes Usage Specifications Check method name (functions) Com- Adjusts the amount of circulating P200 - 250 and EP200 mod- pressor (Comp1) refrigerant by adjusting the operat- ing frequency based on the oper- Low-pressure shell scroll ating pressure data...
  • Page 92 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermis- 1) Detects discharge air temper- Degrees Celsius Resistance (Discharge) check ature = 7.465k = 4057 2) Provides high-pressure pro- 25/120 tection 7.465 4057 0°C[32°F] :698kohm 10°C[50°F] :413kohm 20°C[68°F] :250kohm 30°C[86°F] :160kohm...
  • Page 93 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Sole- SV1a, SV1b 1) High/low pressure bypass at AC220-240V Continuity noid Discharge-suc- Open while being powered/ check with a start-up and stopping, and valve tion closed while not being pow- tester capacity control during low- bypass...
  • Page 94 [ VI Refrigerant Circuit ] 2. Indoor Unit Part Symbol Notes Usage Specification Check method Name (functions) Linear 1) Adjusts superheat at the DC12V Refer to the section expan- Opening of stepping motor "Continuity Test with a indoor heat exchanger sion valve driving valve 0-(1800) puls- Tester".
  • Page 95 [ VI Refrigerant Circuit ] HWE10010 - 86 -...
  • Page 96: Control

    VII Control [1] Functions and Factory Settings of the Dipswitches ............89 [2] Controlling the Outdoor Unit .................... 95 [3] Operation Flow Chart..................... 107 HWE10010 - 87 -...
  • Page 97 - 88 -...
  • Page 98: Functions And Factory Settings Of The Dipswitches

    [ VII Control ] VII Control [1] Functions and Factory Settings of the Dipswitches 1. Outdoor unit (1) Control board Units that re- quire switch Function according to switch setting Switch setting timing setting Switch Function Note.2 Unit address setting Set to 00 or 51-100 with the dial switch Before power on For self-diagnosis/...
  • Page 99 [ VII Control ] Units that re- quire switch Function according to switch setting Switch setting timing setting Switch Function Note.2 Test run/Refrigerant oil SW3-2, SW4-8 Dis- SW3-2, SW4-8 En- Anytime after power on recovery operation En- abled abled abled/Disabled Test run mode: ON/ Sends a test-run After power on and when...
  • Page 100 [ VII Control ] Units that re- quire switch Function according to switch setting Switch setting timing setting Switch Function Note.2 Model selection See the table below (Note 4) Before being energized Low-noise mode Capacity priority Low-noise mode Before being energized selection mode (Note 3) Model selection...
  • Page 101 [ VII Control ] 2. Function of the switch (Indoor unit) (1) Dipswitches 1) SW1,3 Function according to switch setting Switch setting timing Switch Function Notes Set to ON (built-in sensor on the remote controller) Room temperature Built-in sensor on Indoor unit inlet on All Fresh (PEFY-VMH-F) model units detection position...
  • Page 102 [ VII Control ] (2) Address switch Actual indoor unit address setting varies in different systems. Refer to the installation manual for the outdoor unit for details on how to make the address setting. Each address is set with a combination of the settings for the 10's digit and 1's digit. (Example) When setting the address to "3", set the 1's digit to 3, and the 10's digit to 0.
  • Page 103 [ VII Control ] (2) ME remote controller (PAR-F27MEA) Set the address of the remote controller with the rotary switch. Rotary switch 10's digit 1's digit (left) (right) Remote controller unit Example: In case of address 108 Address setting range Setting method Main remote controller 101-150...
  • Page 104: Controlling The Outdoor Unit

    [ VII Control ] [2] Controlling the Outdoor Unit -1- Outline of Control Method ŒThe outdoor units are designated as OC, OS1 and OS2 in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large). ŒThe setting of outdoor unit can be verified by using the self-diagnosis switch (SW1).
  • Page 105 [ VII Control ] -5- Bypass Control Bypass solenoid valves (SV1(a,b)), which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1a) (ON = Open) SV1a Operation At compressor startup ON for 4 minutes. After the restoration of thermo or 3 minutes ON for 4 minutes.
  • Page 106 [ VII Control ] -6- Compressor Frequency Control ŒDepending on the capacity required, the frequency of the compressor is controlled to keep the evaporation temperature to Te: 0ºC [32ºF =0.71 MPa [103 psi] during cooling operation, and the condensation temperature to Tc: 49ºC [120ºF = 2.88 MPa [418 psi] during heating operation.
  • Page 107 [ VII Control ] -9- Controlling the plate heat exchanger 2 (Solenoid valve (SV3))(Opens when ON) ŒThe valve positions in different modes are summarized in the table below. Mode Cooling Refrigerant oil recovery in the cooling mode with the compressor operated at low frequency Heating Defrost...
  • Page 108 [ VII Control ] (3) Stopping the defrost operation 1) When SW3-4 is set to OFF ŒThe defrost cycle ends when 12 minutes have passed since the beginning of the cycle, or when the pipe temperature (TH3), in the following table, or above has been continuously detected for 4 minutes. ŒDefrost operation will not stop its operation for 2 minutes once started unless the piping temperature exceeds 25°C [77°F] within 2 minutes, in which case the operation will stop.
  • Page 109 [ VII Control ] Œ30 minutes have passed since the completion of previous refrigerant recovery. ŒWhen the unit keeps running for 3 minutes in a row or more with high discharge temperature ŒTH4 > 105°C [221°F] or 63HS1 > 3.43 MPa [497 psi] (35 kg/cm G) and SC0 >...
  • Page 110 [ VII Control ] (2) RP400, RP450, RP500, RP550, RP600, RP650 models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P250 or above. (*1 Qj The compressor on the OC starts up.
  • Page 111 [ VII Control ] (3) RP700, RP750, RP800, RP850, RP900 models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P250 or above. ( *1 The total operating load of the indoor unit after 5 minutes of operation is between P250 and P1000.
  • Page 112 [ VII Control ] -16- Emergency Operation Mode 1. Problems with the outdoor unit ŒEmergency operation mode is a temporary operation mode in which the outdoor unit that is not in trouble operates when one of the outdoor units in the P500 through P900/EP400 through EP650 models is in trouble or when one or two of the outdoor units in the P950 through P1250/EP700 througt EP900 models are in trouble.
  • Page 113 [ VII Control ] (2) Ending the emergency operation 1) End conditions When one of the following conditions is met, emergency operation stops, and the unit makes an error stop. ŒWhen the integrated operation time of compressor in cooling mode has reached four hours. ŒWhen the integrated operation time of compressor in heating mode has reached two hours.
  • Page 114 [ VII Control ] Emergency operation pattern (2 outdoor units) OC failure OS failure pattern pattern Trouble Normal Normal Trouble Cooling Emergency Permitted Permitted operation Heating Permitted Permitted Capacity that matches Maximum total capacity the total capacity of the of indoor units (Note 1) operable outdoor units Emergency operation pattern (3 outdoor units) OC failure...
  • Page 115 [ VII Control ] -18- DEMAND Control Cooling/heating operation can be prohibited (Thermo-OFF) by an external input to the indoor units. When DIP SW4-4 is set to ON, the 4-step DEMAND control is enabled. Eight-step demand control is possible in the system with two outdoor units. Twelve-step demand control is possible in the system with three outdoor units.
  • Page 116: Operation Flow Chart

    [ VII Control ] [3] Operation Flow Chart 1. Mode determination flowchart (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Unit in the stopped state turned on From outdoor unit Operation SW turned on 1. Protection function self-holding cancelled.
  • Page 117 [ VII Control ] (2) Outdoor unit (cooling and heating modes) Start Normal operation Error Breaker turned on Unit in the stopped state "HO" / "PLEASE WAIT" blinks on the remote controller *Note 1 Indoor units registered to the remote controller From indoor unit Operation command...
  • Page 118 [ VII Control ] 2. Operations in each mode (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat ON 3-minute restart prevention 1.
  • Page 119 [ VII Control ] (2) Heating operation Normal operation Defrost operation Heating operation Unit in the stopped state *Note 1,2 During test run mode Defrost operation 4-way valve ON 4-way valve OFF 1. Indoor unit fan stops 2. Inverter defrost frequency control Test run mode 3.
  • Page 120 [ VII Control ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18°C[64°F] *Note 1 1. Indoor unit fan stop 1. Outdoor unit (compressor) 2.
  • Page 121 [ VII Control ] HWE10010 - 112 -...
  • Page 122: Test Run Mode

    VIII Test Run Mode [1] Items to be checked before a Test Run ................. 115 [2] Test Run Method ......................116 [3] Operating Characteristic and Refrigerant Amount ............117 [4] Adjusting the Refrigerant Amount .................. 117 [5] Refrigerant Amount Adjust Mode................... 120 [6] The following symptoms are normal.
  • Page 123 - 114 -...
  • Page 124: Items To Be Checked Before A Test Run

    [ VIII Test Run Mode ] VIII Test Run Mode [1] Items to be checked before a Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) Measure the insulation resistance between the power supply terminal block and the ground with a 500V megger and make sure it reads at least 1.0Mohm.
  • Page 125: Test Run Method

    [ VIII Test Run Mode ] [2] Test Run Method The figure shows an MA remote controller (PAR-21MAA). ON/OFF button Set Temperature buttons Down Fan Speed button TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER ERROR CODE FUNCTION FILTER WEEKLY...
  • Page 126: Operating Characteristic And Refrigerant Amount

    [ VIII Test Run Mode ] [3] Operating Characteristic and Refrigerant Amount It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air conditioners before attempting to adjust the refrigerant amount in a given system. 1.
  • Page 127 [ VIII Test Run Mode ] 3. Amount of refrigerant to be added The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Outdoor unit model P200 P250...
  • Page 128 [ VIII Test Run Mode ] (2) Example: PUHY-P500YSHM-A 9.52 9.52 (3 m) (1 m) 12.7 (10 m) 15.88 (10 m) × Liquid separator 12.7 9.52 9.52 9.52 6.35 (10 m) (20 m) (10 m) (10 m) (10 m) 15.88 (30 m) model model model...
  • Page 129: Refrigerant Amount Adjust Mode

    [ VIII Test Run Mode ] [5] Refrigerant Amount Adjust Mode 1. Procedures Follow the procedures below to adjust refrigerant charge as necessary. When the function switch (DIP SW5-10) on the outdoor unit MAIN board is turned to ON, the unit goes into the refrigerant charge adjustment mode, and the following sequence is followed.
  • Page 130 [ VIII Test Run Mode ] (*1)The operation mode will automatically be selected depending on the outside temperature. 20°C or above: Cooling Below 15°C: Heating Set SW4-3 to ON to start the refrigerant If the outside temperature is 15°C or above and below 20°C, the operation mode will charge adjustment mode.
  • Page 131: The Following Symptoms Are Normal

    [ VIII Test Run Mode ] [6] The following symptoms are normal. Remote controller Symptoms Cause display The indoor unit does not start "Cooling (heating)" The unit cannot perform a heating (cooling) operation when other indoor after starting cooling (heating) icon blinks on the units are performing a cooling (heating) operation.
  • Page 132: Standard Operation Data (Reference Data)

    [ VIII Test Run Mode ] [7] Standard Operation Data (Reference Data) 1. Single unit (1) Cooling operation Outdoor unit model Operation PUHY-RP200YJM-A PUHY-RP250YJM-A 27°C/19°C 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] 35°C/- [95°F/- ] No.
  • Page 133 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP300YJM-A PUHY-RP350YJM-A 27°C/19°C 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 134 [ VIII Test Run Mode ] (2) Heating operation Outdoor unit model Operation PUHY-RP200YJM-A PUHY-RP250YJM-A Indoor 20°C/- [68°F/- ] 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C 7°C/6°C Outdoor ture [45°F/43°F] [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating...
  • Page 135 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP300YJM-A PUHY-RP350YJM-A Indoor 20°C/- [68°F/- ] 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C 7°C/6°C Outdoor ture [45°F/43°F] [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 136 [ VIII Test Run Mode ] 2. 2-unit combination (1) Cooling operation Outdoor unit model Operation PUHY-RP400YSJM-A PUHY-RP200YJM-A PUHY-RP200YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating...
  • Page 137 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP450YSJM-A PUHY-RP250YJM-A PUHY-RP200YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 200/125/80/50 Main pipe 10 [32-3/4]...
  • Page 138 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP500YSJM-A PUHY-RP250YJM-A PUHY-RP250YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 250/125/100/32 Main pipe 10 [32-3/4]...
  • Page 139 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP550YSJM-A PUHY-RP300YJM-A PUHY-RP250YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 125/125/100/100/100/20 Main pipe 10 [32-3/4]...
  • Page 140 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP600YSJM-A PUHY-RP300YJM-A PUHY-RP300YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 125/125/100/100/100/50 Main pipe 10 [32-3/4]...
  • Page 141 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP650YSJM-A PUHY-RP350YJM-A PUHY-RP300YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 125/125/100/100/100/100 Main pipe 10 [32-3/4]...
  • Page 142 [ VIII Test Run Mode ] (2) Heating operation Outdoor unit model Operation PUHY-RP400YSJM-A PUHY-RP200YJM-A PUHY-RP200YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model...
  • Page 143 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP450YSJM-A PUHY-RP250YJM-A PUHY-RP200YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 200/125/80/50 Main pipe 10 [32-3/4]...
  • Page 144 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP500YSJM-A PUHY-RP250YJM-A PUHY-RP250YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 250/125/100/32 Main pipe 10 [32-3/4]...
  • Page 145 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP550YSJM-A PUHY-RP300YJM-A PUHY-RP250YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 125/125/100/100/100/20 Main pipe 10 [32-3/4]...
  • Page 146 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP600YSJM-A PUHY-RP300YJM-A PUHY-RP300YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 125/125/100/100/100/50 Main pipe 10 [32-3/4]...
  • Page 147 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-RP650YSJM-A PUHY-RP350YJM-A PUHY-RP300YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions Model 125/125/100/100/100/100 Main pipe 10 [32-3/4]...
  • Page 148 [ VIII Test Run Mode ] 3. 3-unit combination (1) Cooling operation Outdoor unit model PUHY-RP700YSJM-A Operation PUHY- PUHY- PUHY- RP250YJM-A RP250YJM-A RP200YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No.
  • Page 149 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP750YSJM-A Operation PUHY- PUHY- PUHY- RP250YJM-A RP250YJM-A RP250YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 150 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP800YSJM-A Operation PUHY- PUHY- PUHY- RP300YJM-A RP250YJM-A RP250YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 151 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP850YSJM-A Operation PUHY- PUHY- PUHY- RP300YJM-A RP300YJM-A RP250YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 152 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP900YSJM-A Operation PUHY- PUHY- PUHY- RP300YJM-A RP300YJM-A RP300YJM-A 27°C/19°C Ambient Indoor tempera- DB/WB [81°F/66°F] ture Outdoor 35°C/- [95°F/- ] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 153 [ VIII Test Run Mode ] (2) Heating operation Outdoor unit model PUHY-RP700YSJM-A Operation PUHY- PUHY- PUHY- RP250YJM-A RP250YJM-A RP200YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating...
  • Page 154 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP750YSJM-A Operation PUHY- PUHY- PUHY- RP250YJM-A RP250YJM-A RP250YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 155 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP800YSJM-A Operation PUHY- PUHY- PUHY- RP300YJM-A RP250YJM-A RP250YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 156 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP850YSJM-A Operation PUHY- PUHY- PUHY- RP300YJM-A RP300YJM-A RP250YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 157 [ VIII Test Run Mode ] Outdoor unit model PUHY-RP900YSJM-A Operation PUHY- PUHY- PUHY- RP300YJM-A RP300YJM-A RP300YJM-A Indoor 20°C/- [68°F/- ] Ambient tempera- DB/WB 7°C/6°C Outdoor ture [45°F/43°F] No. of connected units Unit Indoor No. of units in opera- unit tion Operating conditions...
  • Page 158: Troubleshooting

    IX Troubleshooting [1] Error Code Lists ......................151 [2] Responding to Error Display on the Remote Controller..........154 [3] Investigation of Transmission Wave Shape/Noise............221 [4] Troubleshooting Principal Parts ..................224 [5] Refrigerant Leak ......................244 [6] Compressor Replacement Instructions................246 [7] Troubleshooting Using the Outdoor Unit LED Error Display..........
  • Page 159 - 150 -...
  • Page 160: Error Code Lists

    [ IX Troubleshooting ] IX Troubleshooting [1] Error Code Lists Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4300 0403 Serial communication error 4305 (Note) 0900 Test run 1102 1202 Discharge temperature fault 1301 Low pressure fault 1302...
  • Page 161 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Indoor unit pipe tempera- ture (TH22) Temperature sensor 5102 1217 fault OA processing unit pipe temperature (TH2) Indoor unit gas-side pipe temperature (TH23) OA processing unit gas- Temperature sensor...
  • Page 162 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Communication error between device and trans- 6606 mission processors 6607 No ACK error 6608 No response error MA controller signal reception error (No signal re- 6831 ception) MA remote controller signal transmission error...
  • Page 163: Responding To Error Display On The Remote Controller

    [ IX Troubleshooting ] [2] Responding to Error Display on the Remote Controller 1. Error Code 0403 Serial communication error 2. Error definition and error detection method Serial communication error between the control board and the INV board on the compressor, and between the control board and the Fan board Detail code 01: Between the control board and the INV board Detail code 05: Between the control board and the Fan board...
  • Page 164 [ IX Troubleshooting ] 1. Error Code 1102 Discharge temperature fault 2. Error definition and error detection method 1) If the discharge temperature of 120 °C [248°F] or more is detected during the above operation (the first detection), the outdoor unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.
  • Page 165 [ IX Troubleshooting ] 1. Error Code 1301 Low pressure fault 2. Error definition and error detection method When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops. 3.
  • Page 166 [ IX Troubleshooting ] 1. Error Code 1302 High pressure/intermediate pressure fault 1 (outdoor unit) 2. Error definition and error detection method 1) If the pressure sensor reading exceeds 3.78 MPa (cooling) or 3.05 MPa (heating) or if the intermediate pressure sensor read- ing exceeds 3.05 MPa (cooling)(first detection), outdoor unit will stop, go into the 3-minute restart delay mode, and automat- ically restart after three minutes.
  • Page 167 [ IX Troubleshooting ] 1. Error Code 1302 High pressure fault 2 (Outdoor unit) 2. Error definition and error detection method If the pressure of 0.098MPa [14psi] or lower is registered on the pressure sensor immediately before start-up, it will trigger an abnormal stop, and error code "1302"...
  • Page 168 [ IX Troubleshooting ] 1. Error Code 2500 Drain sensor submergence (Models with a drain sensor) 2. Error definition and error detection method 1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
  • Page 169 [ IX Troubleshooting ] 1. Error Code 2500 Drain sensor submergence (Models with a float switch) 2. Error definition and error detection method 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.
  • Page 170 [ IX Troubleshooting ] 1. Error Code 2502 Drain pump fault (Models with a drain sensor) 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water.
  • Page 171 [ IX Troubleshooting ] 1. Error Code 2502 Drain pump fault (Models with a float switch) 2. Error definition and error detection method 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.
  • Page 172 [ IX Troubleshooting ] 1. Error Code 2503 Drain sensor (Thd) fault 2. Error definition and error detection method ŒIf the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode.
  • Page 173 [ IX Troubleshooting ] 1. Error Code 2600 Water leakage from humidifier 2. Error definition and error detection method 1) If the float switch for detecting water leakage is submerged in the water in the humidifier's drain pan and when the drain pump goes from OFF to ON, this condition is considered a preliminary water leakage.
  • Page 174 [ IX Troubleshooting ] 1. Error Code 2601 Water supply cutoff 2. Cause, check method and remedy Cause Check method and remedy The water tank of the humidifier is empty. Check the amount of supply water. Check for the solenoid valve and for the connection. The solenoid valve for humidification is OFF.
  • Page 175 [ IX Troubleshooting ] 1. Error Code 4102 Open phase 2. Error definition and error detection method ŒAn open phase of the power supply (L1 phase, N phase) was detected at power on. ŒThe L3 phase current is outside of the specified range. The open phase of the power supply may not always be detected if a power voltage from another circuit is applied.
  • Page 176: Error Code 4106

    [ IX Troubleshooting ] 1. Error Code 4106 <Transmission power supply fault Error detail code FF (Outdoor unit)> 2. Error definition and error detection method Transmission power output failure 3. Cause 1) Wiring failure 2) Transmission power supply cannot output voltage because overcurrent was detected. 3) Voltage cannot be output due to transmission power supply problem.
  • Page 177 [ IX Troubleshooting ] 1. Error Code 4115 Power supply signal sync error 2. Error definition and error detection method The frequency cannot be determined when the power is switched on. 3. Cause, check method and remedy Cause Check method and remedy Power supply error Check the voltage of the power supply terminal block (TB1).
  • Page 178 [ IX Troubleshooting ] 1. Error Code 4220 4225 Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 289V or less is detected during Inverter operation. (S/W detection) 3. Cause, check method and remedy (1) Power supply environment Check whether the unit makes an instantaneous stop when the detection result is abnormal or a power failure occurs.
  • Page 179 [ IX Troubleshooting ] 1. Error Code 4220 4225 Abnormal bus voltage rise (Detail code 109) 2. Error definition and error detection method If Vdc 830V is detected during inverter operation. 3. Cause, check method and remedy (1) Different voltage connection Check the power supply voltage on the power supply terminal block (TB1).
  • Page 180 [ IX Troubleshooting ] 1. Error Code 4220 4225 Logic error (Detail code 111) 2. Error definition and error detection method H/W error If only the H/W error logic circuit operates, and no identifiable error is detected. 3. Cause, Check method and remedy In the case of 4220 Cause Check method and remedy...
  • Page 181 [ IX Troubleshooting ] 1. Error Code 4220 4225 Low bus voltage at startup (Detail code 131) 2. Error definition and error detection method When Vdc 160 V is detected just before the inverter operation. 3. Cause, check method and remedy (1) Inverter main circuit failure Same as detail code 108 of 4220 error Refer to section -6- "Inverter"...
  • Page 182 [ IX Troubleshooting ] 1. Error Code 4240 Overload protection 2. Error definition and error detection method If the output current of "(Iac) >Imax (Arms)" or "THHS > 100°C [212°F] " is continuously detected for 10 minutes or more during inverter operation. Model Imax(Arms) RP200...
  • Page 183 [ IX Troubleshooting ] 1. Error Code 4250 ACCT overcurrent relay trip (Detail code 102) DCCT overcurrent relay trip (Detail code 103) Overcurrent relay trip (Detail code 106 and 107) 2. Error definition and error detection method RP200 model Overcurrent 38 Apeak or 23 Arms and above is detected by the current sensor. RP250 - RP350 models Overcurrent 56 Apeak or 33 Arms and above is detected by the current sensor.
  • Page 184 [ IX Troubleshooting ] 1. Error Code 4250 4255 Overcurrent error due to short-circuited motor (Detail code 105) 2. Error definition and error detection method When a short is detected on the load side just before starting the inverter operation. 3.
  • Page 185 [ IX Troubleshooting ] 1. Error Code 5101 Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit) 5102 Pipe temperature sensor (TH22) fault (Indoor unit) Pipe temperature sensor (TH2) fault (OA processing unit) 5103 Gas-side pipe temperature sensor (TH23) fault (Indoor unit) Gas-side pipe temperature sensor (TH3) fault (OA processing unit)
  • Page 186 [ IX Troubleshooting ] 1. Error Code 5102 HIC bypass circuit outlet temperature sensor (TH2) fault (Outdoor unit) 5103 Heat exchanger outlet temperature sensor (TH3) fault (Outdoor unit) 5104 Discharge temperature sensor (TH4) fault (Outdoor unit) 5105 Accumulator inlet temperature sensor (TH5) fault (Outdoor unit) 5106 HIC circuit outlet temperature sensor (TH6) fault (Outdoor unit) 5107...
  • Page 187 [ IX Troubleshooting ] 1. Error Code 5110 Heatsink temperature sensor (THHS) fault (Detail code 01) 2. Error definition and error detection method When a short or an open of THHS is detected just before or during the inverter operation. 3.
  • Page 188 [ IX Troubleshooting ] 1. Error Code 5301 ACCT sensor fault (Detail code 115) 2. Error definition and error detection method When the formula "output current < 1.5 Arms" remains satisfied for 10 seconds while the inverter is in operation. 3.
  • Page 189 [ IX Troubleshooting ] 1. Error Code 5301 ACCT sensor circuit fault (Detail code 117) 2. Error definition and error detection method When an error value is detected with the ACCT detection circuit just before the inverter starts 3. Cause, check method and remedy Cause Check method and remedy INV board failure...
  • Page 190 [ IX Troubleshooting ] 1. Error Code 5301 DCCT sensor circuit fault (Detail code118) 2. Error definition and error detection method When an error value is detected with the DCCT detection circuit just before the inverter starts 3. Cause, check method and remedy Cause Check method and remedy Contact failure...
  • Page 191 [ IX Troubleshooting ] 1. Error Code 5301 Open-circuited IPM/Loose ACCT connector (Detail code 119) 2. Error definition and error detection method Presence of enough current cannot be detected during the self-diagnostic operation immediately before inverter startup. 3. Cause, check method and remedy Cause Check method and remedy Inverter output wiring problem...
  • Page 192 [ IX Troubleshooting ] 1. Error Code 5701 Loose float switch connector 2. Error definition and error detection method Detection of the disconnected float switch (open-phase condition) during operation 3. Cause, check method and remedy (1) CN4F disconnection or contact failure Check for disconnection of the connector (CN4F) on the indoor unit control board.
  • Page 193 [ IX Troubleshooting ] 1. Error Code 6500 Indoor unit cleaning operation error 2. Error definition and error detection method This error is detected when the indoor units are operated in the mode different from the one determined by the outdoor unit during refrigerant oil recovery operation.
  • Page 194 [ IX Troubleshooting ] 1. Error Code 6601 Polarity setting error 2. Error definition and error detection method The error detected when transmission processor cannot distinguish the polarities of the M-NET transmission line. 3. Cause, check method and remedy Cause Check method and remedy No voltage is applied to the M-NET transmission line Check if power is supplied to the M-NET transmission...
  • Page 195 [ IX Troubleshooting ] 1. Error Code 6602 Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 196 [ IX Troubleshooting ] 1. Error Code 6603 Transmission line bus busy error 2. Error definition and error detection method ŒGenerated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy ŒGenerated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 197 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 198 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 199 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 200 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 201 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 202 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 203 [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 204: Error Code 6607

    [ IX Troubleshooting ] 1. Error Code 6607 No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 205 [ IX Troubleshooting ] 1. Error Code 6608 No response error 2. Error definition and error detection method ŒWhen no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- ŒWhen the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 206 [ IX Troubleshooting ] 1. Error Code 6831 MA controller signal reception error (No signal reception) 2. Error definition and error detection method ŒCommunication between the MA remote controller and the indoor unit is not done properly. ŒNo proper data has been received for 3 minutes. 3.
  • Page 207 [ IX Troubleshooting ] 1. Error Code 6832 MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method ŒMA remote controller and the indoor unit is not done properly. ŒFailure to detect opening in the transmission path and unable to send signals Indoor unit : 3 minutes Remote controller : 6 seconds 3.
  • Page 208 [ IX Troubleshooting ] 1. Error Code 6833 MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method ŒCommunication between the MA remote controller and the indoor unit is not done properly. ŒAn error occurs when the transmitted data and the received data differ for 30 times in a row. 3.
  • Page 209 [ IX Troubleshooting ] 1. Error Code 6834 MA controller signal reception error (Start bit detection error) 2. Error definition and error detection method ŒCommunication between the MA remote controller and the indoor unit is not done properly. ŒNo proper data has been received for 2 minutes. 3.
  • Page 210 [ IX Troubleshooting ] 1. Error Code 7100 Total capacity error 2. Error definition and error detection method The model total of indoor units in the system with one outdoor unit exceeds limitations. 3. Error source, cause, check method and remedy, Error source Cause Check method and remedy...
  • Page 211 [ IX Troubleshooting ] 1. Error Code 7101 Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or outdoor unit 3. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit...
  • Page 212 [ IX Troubleshooting ] 1. Error Code 7102 Wrong number of connected units 2. Error definition and error detection method The number of connected indoor units is "0" or exceeds the allowable value. 3. Error source, cause, check method and remedy Error source Cause Check method and remedy...
  • Page 213 [ IX Troubleshooting ] 1. Error Code 7105 Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address 3. Cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Erroneous setting of OC unit address Check that the address of OC unit is set to 51- The address of outdoor unit is not being set to 51 - 100.
  • Page 214: Error Code 7110/7111

    [ IX Troubleshooting ] 1. Error Code 7110 Connection information signal transmission/reception error 2. Error definition and error detection method The given indoor unit is inoperable because it is not properly connected to the outdoor unit in the same system. 3.
  • Page 215: Error Code 7113/7116/7117

    [ IX Troubleshooting ] 1. Error Code 7113 Function setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring failure Control board connector Check the CNTYP2,4,5 connector connection. INV board connector Check the CNTYP connector connection Disconnected connector, short cir- Check the compatibility of the circuit board, and replace...
  • Page 216 [ IX Troubleshooting ] 1. Error Code 7130 Incompatible unit combination 2. Error definition and error detection method The check code will appear when the indoor units with different refrigerant systems are connected. 3. Error source, cause, check method and remedy Error source Cause Check method and remedy...
  • Page 217 [ IX Troubleshooting ] -1- Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start run- ning.(Power indicator does not appear on the screen.) (1) Cause...
  • Page 218 [ IX Troubleshooting ] In the case of MA remote controller 2. Phenomena When the remote controller operation SW is turned on, the operation status briefly appears on the display, then it goes off, and the display lights out immediately, and the unit stops. (1) Cause 1) The power for the M-NET transmission line is not supplied from the outdoor unit.
  • Page 219 [ IX Troubleshooting ] In the case of MA remote controller 3. Phenomena "HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. ("HO" or "PLEASE WAIT" display will normally turn off 5 minutes later after the power on.) (1) Cause 1) The power for the M-NET transmission line is not supplied from the outdoor unit.
  • Page 220 [ IX Troubleshooting ] Flow chart Even if the operation button on the remote controller is pressed, the indoor and the outdoor units do not start running. HWE10010 - 211 -...
  • Page 221 [ IX Troubleshooting ] In case of ME remote controller 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running. (Power indicator does not appear on the screen.) (1) Cause 1) The power for the M-NET transmission line is not supplied from the outdoor unit.
  • Page 222 [ IX Troubleshooting ] In case of ME remote controller 2. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. (1) Cause 1) The power is not supplied to the indoor unit. ŒThe main power of the indoor unit (AC220V) is not on.
  • Page 223 [ IX Troubleshooting ] In case of ME remote controller 3. Phenomena "HO" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. (1) Cause Without using MELANS 1) Outdoor unit address is set to "00" 2) A wrong address is set.
  • Page 224 [ IX Troubleshooting ] In case of ME remote controller 4. Phenomena "88" appears on the remote controller when the address is registered or confirmed. (1) Cause, check method and remedy Cause Check method and remedy An error occurs when the address is registered or con- firmed.
  • Page 225 [ IX Troubleshooting ] Both for MA remote controller and ME remote controller 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough (1) Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
  • Page 226 [ IX Troubleshooting ] Cause Check method and remedy Long piping length Check the piping length to determine if it is contrib- The cooling capacity varies greatly depending on the uting to performance loss. pressure loss. (When the pressure loss is large, the Piping pressure loss can be estimated from the cooling capacity drops.) temperature difference between the indoor unit...
  • Page 227 [ IX Troubleshooting ] 2. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. (1) Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently. Check pressure difference between the detected ŒFaulty detection of pressure sensor.
  • Page 228 [ IX Troubleshooting ] Cause Check method and remedy Indoor unit LEV malfunction Refer to the page of LEV troubleshooting ([4] -5- Insufficient refrigerant flows due to LEV malfunction ).(page 228) (not enough opening). Temperature reading error on the indoor unit piping Check the thermistor.
  • Page 229 [ IX Troubleshooting ] 3. Phenomena Outdoor unit stops at times during operation. (1) Cause, check method and remedy Cause Check method and remedy The first stop is not considered as an error, as the Check the mode operated in the past by displaying unit turns to anti-restart mode for 3 minutes as a pre- preliminary error history on LED display with SW1.
  • Page 230: Investigation Of Transmission Wave Shape/Noise

    [ IX Troubleshooting ] [3] Investigation of Transmission Wave Shape/Noise 1. M-NET transmission Control is performed by exchanging signals between the outdoor unit and the indoor unit (ME remote controller) through M- NET transmission. Noise interference on the transmission line will interrupt the normal transmission, leading to erroneous op- eration.
  • Page 231 [ IX Troubleshooting ] (3) Check method and remedy 1) Measures against noise Check the followings when noise exists on the wave or the errors described in (1) occur. Error code definition Remedy Check that the wiring 1. The transmission line and Isolate the transmission line from the power line (5cm [1-31/32"] or work is performed ac- the power line are not...
  • Page 232 [ IX Troubleshooting ] 2. MA remote controller transmission The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission line, and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row, MA transmission error (6831) will occur.
  • Page 233: Troubleshooting Principal Parts

    [ IX Troubleshooting ] [4] Troubleshooting Principal Parts -1- High-pressure sensor (63HS1) and intermediate-pressure sensor (63HS2) 1. Compare the pressure reading on the high-pressure gauge and on the high-pressure sensor to check the high pres- sure. (Attach a pressure gauge to the check joint of the refrigerant service valve on the liquid side (BV2) to check the in- termediate pressure.) Set the digital display switch (SW1) as follows to have the high-pressure sensor reading displayed on LED1.
  • Page 234 [ IX Troubleshooting ] -2- Low-Pressure Sensor (63LS) 1. Compare the pressure that is detected by the low pressure sensor, and the low pressure gauge pressure to check for failure. By configuring the digital display setting switch (SW1) as shown in the figure below, the pressure as measured by the low- pressure sensor appears on the LED1 on the control board.
  • Page 235 [ IX Troubleshooting ] -3- Solenoid Valve Check whether the output signal from the control board and the operation of the solenoid valve match. Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to the LED's. Each LED shows whether the relays for the following parts are ON or OFF.
  • Page 236 [ IX Troubleshooting ] (3) SV1a and SV1b (bypass valve) This solenoid valve turns on when energized (when the relay is on). 1) This valve turns on and stays on for four minutes at compressor startup. Proper operation can be verified with the LED or by listening for the closing sound of the valve.
  • Page 237 [ IX Troubleshooting ] -5- LEV LEV operation LEV (Indoor unit: Linear expansion valve), SLEV, LEV1, LEV2a, and LEV2b (Outdoor unit: Linear expansion valve) are step- ping-motor-driven valves that operate by receiving the pulse signals from the indoor and outdoor unit control boards. (1) Indoor LEV and Outdoor LEV (LEV2a, LEV2b) The valve opening changes according to the number of pulses.
  • Page 238 [ IX Troubleshooting ] (2) Outdoor LEV (SLEV, LEV1) The valve opening changes according to the number of pulses. 1) Connections between the outdoor control board and LEV1 (outdoor expansion valve) Outdoor control board DC 12V Brown Drive circuit Blue Orange Yellow White...
  • Page 239 [ IX Troubleshooting ] (3) Judgment methods and possible failure mode The specifications of the outdoor unit (outdoor LEV) and the indoor unit (indoor LEV) differ.Therefore, remedies for each failure may vary. Check the remedy specified for the appropriate LEV as indicated in the right column. Malfunction Judgment method Remedy...
  • Page 240 [ IX Troubleshooting ] (4) Outdoor unit LEV (LEV1) coil removal procedure 1) LEV component As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Body Coils Stopper Lead wire 2) Removing the coils...
  • Page 241 [ IX Troubleshooting ] (5) Outdoor unit LEV (LEV2a,2b) coil removal procedure Motor Driver Locknut Bellows Valve assembling Refrigerant Circuit Valve body side Orifice Notes on the procedure 1) Do not put undue pressure on the motor. 2) Do not use motors if dropped. 3) Do not remove the cap until immediately before the procedure.
  • Page 242 [ IX Troubleshooting ] Replacement procedure 1) Stop the air conditioner. After checking that the air conditioner is stopped, turn off the power of the outdoor unit. 2) Prepare two spanners. Hold the valve body with one spanner and loosen the locknut with another one. Turning the locknut counter-clockwise from motor side view can loosen it.
  • Page 243 [ IX Troubleshooting ] -6- Inverter ŒReplace only the compressor if only the compressor is found to be defective. ŒReplace only the fan motor if only the fan motor is found to be defective. ŒReplace the defective components if the inverter is found to be defective. ŒIf both the compressor and the inverter are found to be defective, replace the defective component(s) of both devices.
  • Page 244 [ IX Troubleshooting ] Error display/failure condition Measure/inspection item Inverter related errors Check the details of the inverter error in the error log at X.[1] Table of 4250, 4255, 4220, 4225, 4230, 4240,4260, 5301, 0403 LED codes. Take appropriate measures to the error code and the error details in ac- cordance with IX.
  • Page 245 [ IX Troubleshooting ] (2) Inverter output related troubles Items to be checked Phenomena Remedy Disconnect the invert- Overcurrent error Replace the INV board. Check the er output wire from (4250 Detail code No. 101, 104, INV board er- the terminals of the 105, 106, and 107) ror detection INV board (SC-U,...
  • Page 246 [ IX Troubleshooting ] Items to be checked Phenomena Remedy Disconnect the inverter Inverter-related problems are de- Connect the short-circuit con- Check whether output wire from the ter- tected. nector to CN6, and go to sec- the inverter is minals of the INV board tion [1].
  • Page 247 [ IX Troubleshooting ] Items to be checked Phenomena Remedy Check the fan output wir- Connector contact failure Connect the connector. Check the fan ing. ŒBoard side (CNINV) inverter board ŒFan motor side failure. Check the connector CN- Cnnector contact failure Connect the connector.
  • Page 248 [ IX Troubleshooting ] (3) Trouble treatment when the main power breaker is tripped Items to be checked Phenomena Remedy Check the breaker capacity. Use of a non-specified break- Replace it with a specified breaker. Perform Meg check between the Zero to several ohm, or Meg Check each part and wiring.
  • Page 249 [ IX Troubleshooting ] (5) Simple checking procedure for individual components of main inverter circuit Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less. Part name Judgment method IGBT module...
  • Page 250 [ IX Troubleshooting ] Judgment value (reference) Black ( + ) SC-P1 FT-N SC-L1 SC-L2 SC-L3 SC-P1 5 - 200 ohm 5 - 200 ohm 5 - 200 ohm FT-N Red (-) SC-L1 5 - 200 ohm SC-L2 5 - 200 ohm SC-L3 5 - 200 ohm Black ( + )
  • Page 251: Indoor Unit

    [ IX Troubleshooting ] -7- Control Circuit (1) Control power source function block Power source system (AC 380 / 415 V) Control system (DC 5 ~ 30 V) INV board Noise filter Smoothing capacitor Inverter Compressor Noise filter Rectifier AC 380/ 415V Fuse Terminal block for Inverter drive...
  • Page 252 [ IX Troubleshooting ] (2) Troubleshooting transmission power circuit of outdoor unit Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. DC 24 ~ 30 V Check whether the transmission line is disconnected, check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
  • Page 253: Refrigerant Leak

    [ IX Troubleshooting ] [5] Refrigerant Leak 1. Leak spot: In the case of extension pipe for indoor unit (Cooling season) 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the liquid service valve (BV2) inside the outdoor unit while the compressor is being stopped. 3) Stop all the indoor units;...
  • Page 254 [ IX Troubleshooting ] 2) Therefore, if the power source is turned off within 30 minutes, the lev remains fully closed and the refrigerant remains sealed. When only the power for the indoor unit is turned off, the indoor unit LEV turns from faintly open to fully closed. 3) In the cooling cycle, the section between "21S4b, c"...
  • Page 255: Compressor Replacement Instructions

    [ IX Troubleshooting ] [6] Compressor Replacement Instructions [Compressor replacement procedures] Follow the procedures below (Steps 1 through 6) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compressor. 1. Remove both the top and bottom service panels 2.
  • Page 256 [ IX Troubleshooting ] Compressor covers (right and left) (The inside of the compressor cover is lined with sound insulation material.) Compressor cover (top) Belt heater 4. Remove the compressor cover (top). 5. Remove the compressor wires, compressor covers (right and left), and belt heater. Protection for the sealing material Suction piping...
  • Page 257 [ IX Troubleshooting ] 1. Plate heat exchanger ASSY replacement instructions * Following instructions show procedures for replacing service parts for Plate heat exchanger ASSY . 1 1 . Applicable models • PUHY-RP200,250,300,350YJM-A(-BS) 2) Remove the control box. 2. Service parts list Part Qty.
  • Page 258: Troubleshooting Using The Outdoor Unit Led Error Display

    [ IX Troubleshooting ] [7] Troubleshooting Using the Outdoor Unit LED Error Display If the LED error display appear as follows while all the SW1 switches are set to OFF, check the items under the applicable item numbers below. 1. Error code appears on the LED display. Refer to IX [2] Responding to Error Display on the Remote Controller.
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  • Page 260: Led Monitor Display On The Outdoor Unit Board

    X LED Monitor Display on the Outdoor Unit Board [1] How to Read the LED on the Service Monitor ............... 253 HWE10010 - 251 -...
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  • Page 262: How To Read The Led On The Service Monitor

    [ X LED Monitor Display on the Outdoor Unit Board ] X LED Monitor Display on the Outdoor Unit Board [1] How to Read the LED on the Service Monitor 1. How to read the LED By setting the DIP SW 1-1 through 1-10 (Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.
  • Page 263 [ X LED Monitor Display on the Outdoor Unit Board ] 3. Time data storage function The outdoor unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiv- ing the time set by the system controller, such as G(B)-50A. If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the service memory.
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  • Page 306 Service Handbook Service Handbook Model PUHY-RP200, RP250, RP300, RP350YJM-A PUHY-RP400, RP450, RP500, RP550, RP600, RP650YSJM-A PUHY-RP700, RP750, RP800, RP850, RP900YSJM-A http://Global.MitsubishiElectric.com Issued in Jul. 2010 HWE10010 New publication effective Jul. 2010. Printed in Japan Specifications subject to change without notice.