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Mitsubishi Electric PURY-WP200 Service Manual

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AIR CONDITIONER
2014
Service Handbook
Model
PURY-WP200, WP250YJM-A
CMB-WP108V-G
3rd edition

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  Summary of Contents for Mitsubishi Electric PURY-WP200

  • Page 1 AIR CONDITIONER 2014 Service Handbook Model PURY-WP200, WP250YJM-A CMB-WP108V-G 3rd edition...
  • Page 2: Safety Precautions

    Do not touch the heat exchanger fins. It may also be in violation of applicable laws. The fins are sharp and dangerous. MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the In the event of a refrigerant leak, thoroughly ventilate use of the wrong type of refrigerant.
  • 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 Do not use the existing refrigerant piping. Use a vacuum pump with a reverse-flow check valve. A large amount of chlorine that may be contained in the re- If a vacuum pump that is not equipped with a reverse-flow sidual refrigerant and refrigerating machine oil in the exist- check valve is used, the vacuum pump oil may flow into the ing piping may cause the refrigerating machine oil in the...
  • 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 turn off the power immediately after stopping the operation. 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- Keep the unit on for at least five minutes before turning off tions.
  • Page 8: Table Of Contents

    CONTENTS I Read Before Servicing [1] Read Before Servicing......................3 [2] Necessary Tools and Materials ....................4 [3] Piping Materials ........................5 [4] Storage of Piping ........................7 [5] Pipe Processing........................7 [6] Brazing............................8 [7] Air Tightness Test........................9 [8] Vacuum Drying (Evacuation) ....................
  • Page 9 IX Troubleshooting [1] Error Code Lists........................129 [2] Responding to Error Display on the Remote Controller............133 [3] Investigation of Transmission Wave Shape/Noise ............... 204 [4] Troubleshooting Principal Parts.................... 207 [5] Refrigerant Leak ........................229 [6] Compressor Replacement Instructions................. 231 [7] Servicing the HBC controller....................
  • Page 10 I Read Before Servicing [1] Read Before Servicing .......................3 [2] Necessary Tools and Materials..................4 [3] Piping Materials ......................... 5 [4] Storage of Piping ....................... 7 [5] Pipe Processing ......................... 7 [6] Brazing..........................8 [7] Air Tightness Test ......................9 [8] Vacuum Drying (Evacuation) ...................
  • Page 11 HWE1113B - 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 CITY MULTI R2 YJM-A series (for exclusive use with HBC controller): 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: Piping Materials

    [ I Read Before Servicing ] [3] Piping Materials Do not use the existing piping! 1. Copper pipe materials O-material (Soft Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material (Light Annealed) Hard copper pipes (straight pipes). They are stronger than the O-material (Soft An- nealed) at the same radial thickness.
  • Page 15 [ I Read Before Servicing ] 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant. 5. Flare processing (O-material (Soft Annealed) and OL-material only) The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system.
  • Page 16: Storage Of Piping

    [ I Read Before Servicing ] [4] Storage of Piping 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2.
  • Page 17: Brazing

    [ I Read Before Servicing ] [6] 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 18: Air Tightness Test

    [ I Read Before Servicing ] [7] 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 Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight- ness, taking temperature variations into account.
  • Page 19: Vacuum Drying (Evacuation)

    [ I Read Before Servicing ] [8] 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 20 [ I Read Before Servicing ] 7. Notes To evacuate air from the entire system Applying a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1 and 2) is not enough to attain the desired vacuum pressure. Be sure to apply a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1 and 2) and also through the check joints on the high and low pressure sides (CJ1 and 2).
  • Page 21: Refrigerant Charging

    [ I Read Before Servicing ] [9] 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 22: Characteristics Of The Conventional And The New Refrigerants

    [ I Read Before Servicing ] [11] 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 23: Notes On Refrigerating Machine Oil

    [ I Read Before Servicing ] [12] 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 24: Water Piping

    [ I Read Before Servicing ] [13] Water piping 1. Precautions for water piping Consider the following when installing a water piping system. (1) Design pressure of the water piping Use a water pipe that is strong enough to withstand the design pressure (1.0 MPa). (2) Water pipe type Use of plastic pipe is recommended.Do not use chloride plastic pipes.
  • Page 25 [ I Read Before Servicing ] 2. Notes on corrosion (1) Water quality It is important to check the water quality beforehand. See table below (Circulating water/Makeup Water Quality Standards). Lower mid-range Tendency temperature water system Recirculating Items water Make-up Scale- Corrosive [20<T<60°C]...
  • Page 26 (1) Brine concentration Use propylene glycol solution for antifreeze. Refer to the following graph to estimate the brine concentration required for freeze protection. Brine concentration [wt%] (2) Capacity correction by brine concentration (cooling) PURY-WP200, 250YJM-A 0.99 0.99 0.98 0.98 0.97 0.97...
  • Page 27 [ I Read Before Servicing ] HWE1113B - 18 -...
  • Page 28: Restrictions

    II Restrictions [1] System configuration ....................... 21 [2] Types and Maximum allowable Length of Cables ............22 [3] Switch Settings and Address Settings ................23 [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 29 HWE1113B - 20 -...
  • Page 30: 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 units HBC controller Maximum total capacity Maximum number Types of connectable...
  • Page 31: 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 32: Switch Settings And Address Settings

    [ II Restrictions ] 2) Remote controller wiring MA remote controller ME remote controller Type VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT Shielded cable MVVS 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]...
  • Page 33 [ 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 Sym- Address Setting method Factory setting address range setting CITY MULTI...
  • Page 34 [ II Restrictions ] (2) Power supply switch connector connection on the outdoor unit (Factory setting: The male power supply switch connector is connected to CN41.) There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the DATABOOK for details.
  • Page 35 [ 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 36 [ 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 37 [ II Restrictions ] 3. 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 and OS). Between 2 and 8 steps of demand control is possible by setting Dip SW4-4 on the outdoor units (OC and OS). DipSW4-4 Demand control switch Input to CN3D*...
  • 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 ] (4) Wiring method Set one of the MA remote controllers as a sub controller. (Refer to the Instruction Manual for the MA remote con- 1) Indoor/outdoor transmission line troller for the setting method.) Daisy-chain terminals M1 and M2 of 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-...
  • 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 Group...
  • Page 42 [ II Restrictions ] 2) Transmission line for centralized control (4) Wiring method No connection is required. 1) Indoor/outdoor transmission line Daisy-chain terminals M1 and M2 of the terminal block 3) MA remote controller wiring for indoor-outdoor transmission line (TB3) on the outdoor Same as [5] 1.
  • 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 from CN41 to CN40. Group Group Group connector on SW2-1 OFF CN41 as it is.
  • Page 44 [ II Restrictions ] (4) Wiring method problem with the outdoor unit whose power jumper was moved from CN41 to CN40, central control is not possible, 1) Indoor/outdoor transmission line even if TB7's are daisy-chained.) Same as [5] 2. Only use shielded cables. Shielded cable connection Shielded cable connection Same as [5] 2.
  • 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 from CN41 to CN40.
  • Page 46 [ II Restrictions ] (4) Wiring method Only use shielded cables. 1) Indoor/outdoor transmission line Shielded cable connection Same as [5] 2. Daisy-chain the S terminal of the terminal block (TB7) on the system controller, OC, and OS with the shield of the shielded 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 CN41 CN40 Replace Leave the male SW2-1 OFF ON connector on CN41 as it is.
  • Page 48 [ II Restrictions ] (4) Wiring method b) If TB7's on the outdoor units in the same refrigerant circuit are not 1) Indoor/outdoor transmission line daisy-chained, connect the transmission line for the central control system to TB7 of the OC. (Note a).To maintain the central control Daisy-chain terminals M1 and M2 of the terminal block for indoor- even during an OC failure or a power failure, connect TB7 on OC outdoor transmission line (TB3) on the outdoor units (OC and OS)
  • 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 from CN41 to CN40. connector on SW2-1 OFF ON CN41 as it is.
  • Page 50 [ II Restrictions ] door-outdoor transmission line. (4) Wiring method When 2 remote controllers are connected to the sys- 1) Indoor/outdoor transmission line Same as [5] 2. Refer to the section on Switch Setting. Shielded cable connection Performing a group operation (including the group Same as [5] 2.
  • 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 Move the male connector Leave the male from CN41 to CN40. Group Group connector on SW2-1 OFF ON CN41 as it is.
  • Page 52 [ II Restrictions ] (3) Maximum allowable length (4) Wiring method 1) Indoor/outdoor transmission line 1) Indoor/outdoor transmission line Same as [5] 3. Same as [5] 2. 2) Transmission line for centralized control Shielded cable connection Same as [5] 4. Same as [5] 2.
  • Page 53 [ II Restrictions ] (5) Address setting method Pro- dress Facto- Unit or controller set- Setting method Notes ry set- dure ting ting range Opera- Main 01 to Assign the smallest address to Assign an address smaller than that of the main unit in the group.
  • Page 54: Restrictions On Pipe Length

    [ II Restrictions ] [8] Restrictions on Pipe Length Outdoor unit H,H' HBC controller Indoor Branch joint Indoor Indoor Maximum of 3 units per port (WP15 - WP50 models) Total capacity of WP80 or below Unit: m [ft] Operation Pipe sections Allowable length of pipes Length Total pipe length...
  • Page 55 [ II Restrictions ] 1. Refrigerant pipe size (1) Between outdoor unit and HBC controller (Part A) Unit : mm [inch] Outdoor units High-pressure pipe Low-pressure pipe WP200 ø15.88 [5/8"] ø19.05 [3/4"] WP250 ø19.05 [3/4"] ø22.2 [7/8"] (2) Between HBC controller and indoor units (Sections a, c, and d) Unit : mm [inch] Indoor unit Inlet pipe size...
  • Page 56: Outdoor Unit Components

    III Outdoor Unit Components [1] Outdoor Unit Components and Refrigerant Circuit ............49 [2] Control Box of the Outdoor Unit..................51 [3] Outdoor Unit Circuit Board....................52 [4] HBC Controller Components ................... 57 [5] Control Box of the HBC Controller ................... 59 [6] HBC Controller Circuit Board ...................
  • Page 57 HWE1113B - 48 -...
  • Page 58: 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 a outdoor unit (1) PURY-WP200, WP250YJM-A Fan guard Control Heat exchanger Front panel Fin guard HWE1113B - 49 -...
  • Page 59 [ III Outdoor Unit Components ] 2. Refrigerant circuit (1) PURY-WP200, WP250YJM-A Low pressure sensor Solenoid valve (SV2) (63LS) Check valve High-pressure switch assembly (CV7a) (63H1) 4-way valve High pressure sensor (21S4a) (63HS1) Solenoid valve Accumulator (SV9) (ACC) Check valve...
  • Page 60: 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 61: 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 connection (Fan board) Serial communication signal output CNAC2 driving output LED1...
  • Page 62 [ 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 63 [ 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 64: 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 65 [ 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 66: Hbc Controller Components

    [ III Outdoor Unit Components ] [4] HBC Controller Components 1. CMB-WP108V-G (1) Front High pressure pipe Low pressure pipe Return Expansion tank Water supply Drain Flow to Indoor unit Sub-Drain pan(Optional parts) Optional sub-drain pan can be installed. (2) Front right side (heating) Air purge valves Strainer Pump 1...
  • Page 67 [ III Outdoor Unit Components ] (3) Rear right side (cooling) Water pressure protection valves 21S4Ma Strainer 21S4Mb Water purge valve Pump 2 LEV2 LEV1 LEV3 (4) Top side FCV3h (the bottom of MV2h) MV2h MV1h FCV3a (the bottom of MV2a) MV2a MV1a HWE1113B...
  • Page 68: Control Box Of The Hbc Controller

    [ III Outdoor Unit Components ] [5] Control Box of the HBC Controller 1. CMB-WP108V-G Terminal block for transmission line Terminal block for power supply AC reactor (ACL) Power supply circuit board HBC controller board HWE1113B - 59 -...
  • Page 69: Hbc Controller Circuit Board

    [ III Outdoor Unit Components ] [6] HBC Controller Circuit Board 1. HBC controller circuit board HWE1113B - 60 -...
  • Page 70 [ III Outdoor Unit Components ] 2. Power supply circuit board HWE1113B - 61 -...
  • Page 71 [ III Outdoor Unit Components ] HWE1113B - 62 -...
  • Page 72: Remote Controller

    IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers ........65 [2] Group Settings and Interlock Settings via the ME Remote Controller ......66 [3] Interlock Settings via the MA Remote Controller ............. 70 [4] Using the built-in Temperature Sensor on the Remote Controller ........71 HWE1113B - 63 -...
  • Page 73 HWE1113B - 64 -...
  • Page 74: 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 75: 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 76 [ 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 77 [ 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 78 [ 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 79: 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.) (1) MA Remote Controller (PAR-21MAA) * 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.
  • Page 80: 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 81 [ IV Remote Controller ] HWE1113B - 72 -...
  • Page 82: Electrical Wiring Diagram

    V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit ..............75 [2] Electrical Wiring Diagram of the HBC Controller ............. 76 [3] Electrical Wiring Diagram of Transmission Booster............78 HWE1113B - 73 -...
  • Page 83 HWE1113B - 74 -...
  • Page 84: Electrical Wiring Diagram Of The Outdoor Unit

    [ V Electrical Wiring Diagram ] V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit (1) PURY-WP200, WP250YJM-A HWE1113B - 75 -...
  • Page 85: Electrical Wiring Diagram Of The Hbc Controller

    [ V Electrical Wiring Diagram ] [2] Electrical Wiring Diagram of the HBC Controller (1) CMB-WP108V-G HWE1113B - 76 -...
  • Page 86 [ V Electrical Wiring Diagram ] (2) CMB-WP108V-G (Detail of X section) HWE1113B - 77 -...
  • Page 87: Electrical Wiring Diagram Of Transmission Booster

    [ V Electrical Wiring Diagram ] [3] Electrical Wiring Diagram of Transmission Booster Terminal block for power supply (TB1) 250V 5A Red Red Red Black White White Green/Yellow 220 - 240VAC Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply...
  • Page 88: Refrigerant Circuit

    VI Refrigerant Circuit [1] Refrigerant Circuit Diagram ..................... 81 [2] Principal Parts and Functions ..................83 HWE1113B - 79 -...
  • Page 89 HWE1113B - 80 -...
  • Page 90: Refrigerant Circuit Diagram

    [ VI Refrigerant Circuit ] VI Refrigerant Circuit [1] Refrigerant Circuit Diagram 1. Outdoor unit (1) PURY-WP200, WP250YJM-A(-BS) 21S4a Solenoid valve block CV7a SV4a SV4b SV4c SV4d ST17 63H1 63HS1 SV1a 63LS CV3a CV2a CV5a CV8a CV9a CV10a SV5b COMP...
  • Page 91 [ VI Refrigerant Circuit ] 2. HBC controller (1) CMB-WP108V-G HWE1113B - 82 -...
  • Page 92: Principal Parts And Functions

    [ VI Refrigerant Circuit ] [2] Principal Parts and Functions 1. Outdoor unit Part Symbols Check meth- Notes Usage Specifications name (functions) Com- Adjusts the amount of circulating Low-pressure shell scroll pressor (Comp1) refrigerant by adjusting the operat- compressor ing frequency based on the oper- Wirewound resistance ating pressure data 20°C[68°F] : 0.323 ohm...
  • Page 93 [ VI Refrigerant Circuit ] Part Symbols Check meth- Notes Usage Specifications name (functions) Thermis- Controls defrosting during heating Degrees Celsius Resistance (Pipe operation check = 15k temperature) = 3460 0/80 R = 15 3460 1) Detects outdoor air tempera- (Outdoor tem- ture perature)
  • Page 94 [ VI Refrigerant Circuit ] 2. Indoor Unit Part Symbol Notes Usage Specification Check method Name (functions) Thermis- Indoor unit control (Thermo) Resistance check (Suction air =15k temperature) =3460 0/80 Rt = Indoor unit control (Inlet water 15exp{3460( 273+t (Pipe temper- temperature detection) 0°C [32°F]:15kohm ature from...
  • Page 95 [ VI Refrigerant Circuit ] 3. HBC controller Part name Symbols Notes Usage Specifications Check method Solenoid SVM1 Refriger- Opens during the cooling mode AC220-240V Continuity check valve ant side and defrost cycle Open when energized/ with a tester closed when de-energized 4-way 21S4Ma,b Refriger-...
  • Page 96: Control

    VII Control [1] Functions and Factory Settings of the Dipswitches ............89 [2] Controlling the Outdoor Unit .................... 96 [3] Controlling HBC Controller..................... 106 [4] Operation Flow Chart..................... 111 HWE1113B - 87 -...
  • Page 97 HWE1113B - 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 mode: en- SW3-2 disabled SW3-2 enabled Anytime after power on abled/disabled Test run mode: ON/ Sends a test-run After power on and when Stops all ICs signal to all IC...
  • 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 Room temperature Built-in sensor on Indoor unit inlet detection position the remote controller Not available Available Clogged filter detection Filter check reminder time setting...
  • 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 [ VII Control ] 4. Switch functions <HBC controller> (Control board) Function according to switch setting Switch setting tim- Switch Function Always leave this 1 - 3 Model setting R410A switch to OFF. SVM1 ON fixed Any time after be- Not available Available control...
  • Page 105: Controlling The Outdoor Unit

    [ VII Control ] [2] Controlling the Outdoor Unit Initial Control -1- Initial Control When the power is turned on, the initial processing of the microcomputer is given top priority. During the initial processing, control processing of the operation signal is suspended. (The control processing is resumed after the initial processing is completed.
  • Page 106 [ VII Control ] Bypass Control -3- Bypass Control Bypass solenoid valves (SV1a), which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1a) (ON = Open) SV1a Operation When each indoor unit compressor startup ON for 4 minutes.
  • Page 107 [ VII Control ] (5) Bypass solenoid valve (SV5c) (ON = Open) SV5c Operation While the unit is stopped Always ON Cooling mode When one or more of the following When the condition on the left is not valves is turned OFF: SV4a through SV4c.
  • Page 108 [ VII Control ] Defrost Operation Control -5- Defrost Operation Control (1) Defrost cycle type The defrost cycle has following two types: Bypass defrost that is the same method as that used in a CITY MULTI series sys- tem and heat recovery defrost (default) that the heat is collected from the water circuit and the defrost cycle ends early. The following figure shows the refrigerant flow for the bypass defrost.
  • Page 109 [ VII Control ] (3) Defrost cycle Bypass defrost Heat recovery defrost Outdoor Unit Dip switch set- SW3-10 ON SW3-10 OFF ting Operation mode Heating-only Heating-main Heating-only Heating-main Outdoor unit fre- 103Hz quency Outdoor unit fan Stop SV1a ON (open) SV5b ON (open) 21S4a, 21S4b...
  • Page 110 [ VII Control ] (4) Recovering from Defrost The setting of the dip switch 3-10 determines the defrost method (bypass defrost or heat recovery defrost). As shown in the following flow chart, the bypass defrost may be performed during the heat recovery defrost depending on the operation status.
  • Page 111 [ VII Control ] Refrigerant Recovery Control -6- Refrigerant Recovery Control The refrigerant recovery control function controls the refrigerant flow at the HBC controller during heating operation to keep the refrigerant from collecting inside the HBC controller. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.
  • Page 112 [ VII Control ] Control at Initial Start-up -8- Control at Initial Start-up When started up for the first time before 12 hours have elapsed after power on, the unit goes into the initial startup mode. At the completion of the initial operation mode, the outdoor unit will go into the normal control mode. The initial operation mode will start when the outdoor unit connected to the HBC controller in air vent operation starts opera- tion (the 4th step).
  • Page 113 [ VII Control ] Operation Mode -10- Operation Mode (1) Indoor unit operation mode The operation mode can be selected from the following 6 modes using the remote controller. Cooling mode Heating mode Dry mode Automatic cooling/heating mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling only mode...
  • Page 114 [ VII Control ] DEMAND Control -11- 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. Refer to Chapter II [3] 2.(7) "Various types of control using input-output signal connector on the outdoor unit (various connec- tion options)"...
  • Page 115: Controlling Hbc Controller

    [ VII Control ] [3] Controlling HBC Controller Water pump control -1- Water pump control Depending on the capacity required, temperature difference on the indoor units is controlled so as to be within a certain range. During normal operation, the changes in specified voltage of the water pump corresponding to the capacity of connectable indoor units are shown in the graph below.
  • Page 116 [ VII Control ] 4-way valve control -2- 4-way valve control 4-way valves (21S4M (a, b)) turn on or off according to the operation mode. For 21S4Ma, ON indicates switching to the cooling side and OFF indicates switching to the heating side. For 21S4Mb, ON indicates switching to the heating side and OFF indicates switching to the cooling side.
  • Page 117 [ VII Control ] Water rate valve control -3- Water flow rate valve control Depending on the capacity required, periodic control is performed every one minute to keep the temperature difference be- tween the heat exchanger outlet pipe temperature and indoor unit port pipe temperature within 4.0ºC for cooling and 4.5ºC for heating, and the opening is controlled in the range between 85 and 950 pulses.
  • Page 118 [ VII Control ] Bypass Control -5- Bypass Control Solenoid valves have two types: (SVM1) that bypass the high- and low- pressure sides; LEV (LEV3). They perform the fol- lowing functions. (1) Bypass solenoid valve (SVM1) (ON: open) SVM1 Operation mode Cooling-only Thermo-ON Always ON Cooling-main Thermo-ON...
  • Page 119 [ VII Control ] Backup control -7- Backup control The following backup control is started on the HBC as necessary. (1) Backup mode for plate heat exchanger protection The following control is performed depending on the outlet pipe temperature of the plate heat exchanger for freeze-up pro- tection.
  • Page 120: Operation Flow Chart

    [ VII Control ] [4] Operation Flow Chart 1. Mode determination flowchart (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Stop turned on Operation SW turned on *Note 1 1. Protection function self-holding cancelled. 2. HBC controller FCV fully closed. *Note 2 Remote controller Error mode...
  • Page 121 [ VII Control ] (2) Outdoor unit (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state "HO" / "PLEASE WAIT" blinks *Note 1 on the remote controller Indoor units registered to the remote controller...
  • Page 122 [ VII Control ] (3) HBC controller (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state Operation command 1. Determination of operation mode Protection function (Cooling only, Heating only, Mixture self-holding cancelled.
  • Page 123 [ 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 3-minute restart prevention 1.
  • Page 124 [ VII Control ] (2) Heating operation Normal operation Heating operation Defrost operation *Note 1,2 Unit in the stopped state Defrost operation During test run mode 4-way valve ON 4-way valve OFF Test run mode 1. Indoor unit fan stop 2.
  • Page 125 [ 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.
  • Page 126: Test Run Mode

    VIII Test Run Mode [1] Items to be checked before a Test Run ................. 119 [2] Test Run Method ......................120 [3] Operating Characteristic and Refrigerant Amount ............121 [4] Adjusting the Refrigerant Amount .................. 121 [5] Refrigerant Amount Adjust Mode................... 123 [6] The following symptoms are normal.
  • Page 127 HWE1113B - 118 -...
  • Page 128: 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 129: 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 130: 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 131 [ 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 WP200 WP250...
  • Page 132: Refrigerant Amount Adjust Mode

    [ VIII Test Run Mode ] [5] Refrigerant Amount Adjust Mode On the model of unit described in this document, the refrigerant charge cannot be adjusted. [6] The following symptoms are normal. Remote controller Symptoms Cause display The auto vane adjusts its posi- After an hour of cooling operation with the auto vane in the vertical posi- tion by itself.
  • Page 133: Standard Operation Data (Reference Data)

    [ VIII Test Run Mode ] [7] Standard Operation Data (Reference Data) (1) Cooling only operation Outdoor unit model Operation PURY-WP200YJM-A PURY-WP250YJM-A Model name of HBC controller CMB-WP108V-G 27°C/ 19°C 27°C/ 19°C Indoor [81°F/ 66°F] [81°F/ 66°F] Ambient tem- DB/WB perature 35°C/ - 35°C/ -...
  • Page 134 [ VIII Test Run Mode ] (2) Heating only operation Outdoor unit model Operation PURY-WP200YJM-A PURY-WP250YJM-A Model name of HBC controller CMB-WP108V-G 20°C/ - 20°C/ - Indoor [68°F/ -] [68°F/ -] Ambient tem- DB/WB perature 7°C/ 6°C 7°C/ 6°C Outdoor [45°F/ 43°F] [45°F/ 43°F] No.
  • Page 135 [ VIII Test Run Mode ] HWE1113B - 126 -...
  • Page 136: Troubleshooting

    IX Troubleshooting [1] Error Code Lists ......................129 [2] Responding to Error Display on the Remote Controller..........133 [3] Investigation of Transmission Wave Shape/Noise............204 [4] Troubleshooting Principal Parts ..................207 [5] Refrigerant Leak ......................229 [6] Compressor Replacement Instructions................231 [7] Servicing the HBC controller..................
  • Page 137 HWE1113B - 128 -...
  • Page 138: 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) 1102 1202 Discharge temperature fault 1301 Low pressure fault 1302 1402...
  • Page 139 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Return air temperature (TH21) Temperature sensor 5101 1202 fault OA processing unit inlet temperature (TH4) Indoor unit pipe tempera- ture (TH22) Temperature sensor OA processing unit pipe...
  • Page 140 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Water-side outlet temp. of 5132 Heating-main heat ex- changer (TH32) Water-side outlet temp. of 5133 Cooling-main heat ex- changer (TH33) Temperature sensor Water pump WP2 outlet 5134...
  • Page 141 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 6603 Transmission line bus busy error 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-...
  • Page 142: Responding To Error Display On The Remote Controller

    [ IX Troubleshooting ] [2] Responding to Error Display on the Remote Controller 0403 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 143 [ IX Troubleshooting ] 1102 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 144 [ IX Troubleshooting ] 1301 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 145 [ IX Troubleshooting ] 1302 1. Error Code 1302 High pressure fault 1 (Outdoor unit) 2. Error definition and error detection method 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the out- door stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.
  • Page 146 [ 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 147 [ IX Troubleshooting ] 2500 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 148 [ 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 149 [ IX Troubleshooting ] 2501 1. Error Code 2501 Water pump fault 2. Error definition and error detection method When clogged water circuit or water leaks from the water circuit is detected, the water pump is stopped for protection. When the following statuses are detected, the pump will be stopped. The revolutions of the water pump exceeds the specific range.
  • Page 150 [ IX Troubleshooting ] 2502 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 151 [ 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 152 [ IX Troubleshooting ] 2503 1. Error Code 2503 Drain sensor (Thd) fault 2. Error definition and error detection method If 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 153 [ IX Troubleshooting ] 2512 1. Error Code 2512 3-way valve/Water flow rate control valve fault 2. Error definition and error detection method Limit signal that is output from 3-way valve/water flow rate control valve is not detected or is not reset after it is detected. 3.
  • Page 154 [ IX Troubleshooting ] 2600 1. Error Code 2600 Water leakage 2. Cause, check method and remedy Check that water does not leak from the pipes in such as the humidifier. 2601 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.
  • Page 155 [ IX Troubleshooting ] 3121 1. Error Code 3121 Out-of-range outside air temperature 2. Error definition and error detection method When the thermistor temperature of -28°C[-18°F] or below has continuously been detected for 3 minutes during heating op- eration (during compressor operation), the unit makes an error stop and "3121" appears on the display. (Use the OC therm- istor temperature to determine when two outdoor units are in operation.) The compressor restarts when the thermistor temperature is -26°C[-15°F] or above (both OC and OS) during error stop.
  • Page 156 [ IX Troubleshooting ] 4102 1. Error Code 4102 Open phase 2. Error definition and error detection method An open phase of the power supply (L1 phase, N phase) was detected at power on. The 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 157 [ IX Troubleshooting ] 4106 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 158 [ IX Troubleshooting ] 4115 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 159 [ IX Troubleshooting ] 4220?4225 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 160 [ 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 161 [ 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 -7- "Inverter"...
  • Page 162 [ IX Troubleshooting ] 4240 1. Error Code 4240 Overload protection 2. Error definition and error detection method If the output current of "(Iac) > 27 (Arms)" or "THHS > 95°C [203°F] " is continuously detected for 10 minutes or more during inverter operation.
  • Page 163 [ IX Troubleshooting ] 1. Error Code 4250 Instantaneous overcurrent (Detail code 106) Overcurrent (effective value) (Detail code 107) 2. Error definition and error detection method Overcurrent is detected by the current sensor (94 Apeak or at least 35 Arms). 3.
  • Page 164 [ 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 165 [ IX Troubleshooting ] 5101,5102,5103,5104 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) Reverse connected inlet/outlet pipe (indoor unit) 5103 Gas-side pipe temperature sensor (TH23) fault (Indoor unit)
  • Page 166 [ IX Troubleshooting ] 5102,5103,5104,5105,5106,5107?5103,5104,5105,5106,5107 1. Error Code 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 Heat exchanger inlet temperature sensor (TH6) fault (Outdoor unit) 5107 Outside temperature sensor (TH7) fault (Outdoor unit) 2.
  • Page 167 [ IX Troubleshooting ] 5110 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 168 [ IX Troubleshooting ] 5111,5112,5115,5116 1. Error Code 5111 5116 Temperature sensor fault (HBC controller) (TH11~TH16) 5132 5137 Temperature sensor fault (HBC controller) (TH32~TH37) 5141 5148 Temperature sensor fault (HBC controller) (TH31a~TH31h) 2. Error definition and error detection method If a shorted (high temperature intake) or open (low temperature intake) thermistor (TH11 through TH16, TH32 through TH37, or TH31a through TH31h) is detected during operation, the unit comes to an abnormal stop, and an error code "5111"...
  • Page 169 [ IX Troubleshooting ] 5201 1. Error Code 5201 High-pressure sensor fault (63HS1) 2. Error definition and error detection method If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the outdoor unit stops once, turns to anti- restart mode for 3 minutes, and restarts after 3 minutes when the detected high pressure sensor is 0.098MPa [14psi] or more.
  • Page 170 [ IX Troubleshooting ] 1. Error Code 5201 High-pressure sensor fault (Outdoor unit 63HS1/HBC controller PS) 2. Error definition and error detection method When a pressure sensor reading of 4.06 MPa [589 psi] or above is detected, error codes "5201" and "5203" will appear. The unit will continue its operation by using other sensors as a backup.
  • Page 171 [ IX Troubleshooting ] 5301 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 172 [ 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 173 [ IX Troubleshooting ] 5401 1. Error Code 5401 Temperature sensor fault 2. Error definition and error detection method A short-circuit or an open-circuit of the humidity sensor is detected during operation. 3. Cause, check method and remedy Cause Check method and remedy Connector contact failure (CN30) (Loose con- Check the connector for proper contact.
  • Page 174 [ IX Troubleshooting ] 5701 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 175 [ IX Troubleshooting ] 6600 1. Error Code 6600 Address overlaps 2. Error definition and error detection method An error in which signals from more than one indoor units with the same address are received The address and attribute that appear on the remote controller indicate the controller that detected the error. 3.
  • Page 176 [ IX Troubleshooting ] 6602 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 177 [ IX Troubleshooting ] 6603 1. Error Code 6603 Transmission line bus busy error 2. Error definition and error detection method Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated 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 178 [ IX Troubleshooting ] 6607 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 179 [ 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 180 [ 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 181 [ 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 182 [ 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 183 [ 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 184 [ 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 185 [ 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 186 [ 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 187 [ IX Troubleshooting ] 6608 1. Error Code 6608 No response error 2. Error definition and error detection method When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- When 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 188 [ IX Troubleshooting ] 6831 1. Error Code 6831 MA controller signal reception error (No signal reception) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes. 3.
  • Page 189 [ IX Troubleshooting ] 6832 1. Error Code 6832 MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals Indoor unit : 3 minutes Remote controller : 6 seconds 3.
  • Page 190 [ IX Troubleshooting ] 6833 1. Error Code 6833 MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row. 3.
  • Page 191 [ IX Troubleshooting ] 6834 1. Error Code 6834 MA controller signal reception error (Start bit detection error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes. 3.
  • Page 192 [ IX Troubleshooting ] 7100 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 193 [ IX Troubleshooting ] 7101 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 194 [ IX Troubleshooting ] 7102 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 195 [ IX Troubleshooting ] 7105 1. Error Code 7105 Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address Erroneous setting of BC controller address 3. Cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Erroneous setting of OC unit address...
  • Page 196 [ IX Troubleshooting ] 7107 1. Error Code 7107 Port setting error 2. Error definition and error detection method The port with wrong number is connected to the indoor unit.The model total connected to the port is greater than the specifi- cation.
  • Page 197 [ IX Troubleshooting ] 7110 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 198 [ IX Troubleshooting ] 7113 1. Error Code 7113 Function setting error (incorrect resistor connection) 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15) Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for tact failure proper connection.
  • Page 199 [ IX Troubleshooting ] 7117 1. Error Code 7117 Model setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15) Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for tact failure proper connection.
  • Page 200 [ IX Troubleshooting ] Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller -1- Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller 1.
  • Page 201 [ 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 202 [ 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 203 [ 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. HWE1113B - 194 -...
  • Page 204 [ IX Troubleshooting ] Troubleshooting according to the remote controller malfunction or the external input error In case of ME remote controller 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...
  • Page 205 [ 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. The main power of the indoor unit (AC220V) is not on.
  • Page 206 [ 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 207 [ 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 208 [ IX Troubleshooting ] Troubleshooting according to the remote controller malfunction or the external input error Both for MA remote controller and ME remote controller 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...
  • Page 209 [ 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 210 [ 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 pressure by the pressure sensor and the actual Faulty detection of pressure sensor.
  • Page 211 [ IX Troubleshooting ] Cause Check method and remedy HBC controller LEV1 and 2 actuation failure Refer to the page of LEV troubleshooting ([4] -5- Sufficient hot water is not supplied on the HBC con- ).(page 212) troller due to HBC controller LEVI, 2, and 3 actuation failure.
  • Page 212 [ 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 213: 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 214 [ 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 215 [ 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 216: Troubleshooting Principal Parts

    [ IX Troubleshooting ] [4] Troubleshooting Principal Parts High-Pressure Sensor -1- High-Pressure Sensor (63HS1, PS1) 1. Compare the pressure that is detected by the high pressure sensor, and the high-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 high- pressure sensor appears on the LED1 on the control board.
  • Page 217 [ IX Troubleshooting ] Low-Pressure Sensor -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 218 [ IX Troubleshooting ] Solenoid Valve -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 219 [ IX Troubleshooting ] Refrigerant Circuit Figure Solenoid Valves Block SV4c SV4d SV4a SV4b CV7a CV3a CV2a CV5a SV5b CV8a CV9a CV10a CV6a CV4a SV5c Solenoid valve block (four compartments) SV4d SV4c SV4b SV4a SV4d SV4c SV4b SV4a SV4c SV4a Pin-face tool Pin-face tool SV4d...
  • Page 220 [ IX Troubleshooting ] (5) In the case of SV5b (Bypass valve) This solenoid valve closes when energized (when the relay is on). This valve turns off for five minutes after the completion of the defrost cycle, or when SV9 is on turned ON and the value of 63HS1 is greater than 3.5 MPa [507psi] during Heating-only or Heating-main operation at the minimum frequency.
  • Page 221 [ IX Troubleshooting ] -5- LEV LEV operation HBC controller LEVI, 2, and 3 (linear expansion valves) are driven by the pulse signal from the control board and are controlled by a stepping motor. (1) HBC controller LEV The valve opening changes according to the number of pulses. 1) Control boards and the LEV (HBC controller LEV1, 2, 3) Control board DC12V...
  • Page 222 [ IX Troubleshooting ] (2) Judgment methods and possible failure mode Malfunction Judgment method Remedy mode Microcomputer Disconnect the control board connector and connect When the drive circuit has a driver circuit fail- the check LED as shown in the figure below. problem, replace the control board.
  • Page 223 [ IX Troubleshooting ] Troubleshooting Principal Parts of HBC Controller -6- Troubleshooting Principal Parts of HBC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor START Check the connectors on pressure sensor P1 for proper connections. Repair the fault. Operating at the moment? Note 1 On the self-diagnosis monitor, measure...
  • Page 224 [ IX Troubleshooting ] 1) Check the self-diagnosis switch (Outdoor control board SW1). Measurement data Symbol SW1 setting value Outdoor high pressure 63HS1 Outdoor low pressure 63LS HBC controller pressure (liquid side) 2) Check CNP1 connector on the HBC controller control board for proper connections. 3) Check the pressure value on the self-diagnosis switch (same as note 2) with the connector of the applied pressure sensor is disconnected from the board.
  • Page 225 [ IX Troubleshooting ] 2. Temperature sensor Troubleshooting instructions for thermistor START Note 1 Pull out the thermistor connector in trouble from the board. Note 2 Measure the temperature of the thermistor in trouble. (actual measurement value) Note 2 Check the thermistor resistor. Compare the temperature corresponding to the resistance measured by the thermistor and the temperature measured by a commercially...
  • Page 226 [ IX Troubleshooting ] 3) Check the self-diagnosis switch (Outdoor control board SW1). Measurement data Symbol SW1 setting value Liquid-side refrigerant temp. of TH11 Heating-main heat exchanger Liquid-side refrigerant temp. of TH12 Cooling-main heat exchanger Gas-side refrigerant temp. of TH13 Heating-main heat exchanger Gas-side refrigerant temp.
  • Page 227 [ IX Troubleshooting ] 3. Troubleshooting flow chart for LEV, Solenoid valve, 3-way valve, and Water flow rate control valve (1) LEV No cooling capacity No heating capacity Check whether the electric expansion valve and the solenoid valve connector are not disconnected or not loose. Fault is found.
  • Page 228 [ IX Troubleshooting ] Troubleshooting flow chart for solenoid valve body Start Check for pins not fully inserted on the connector and check the colors of the lead wires visually. Intermediate connector Control board When LEV is fully closed : tick sound When LEV is fully open : no sound Brown Brown...
  • Page 229 [ IX Troubleshooting ] Inverter -7- Inverter Replace only the compressor if only the compressor is found to be defective. Replace only the fan motor if only the fan motor is found to be defective. Replace the defective components if the inverter is found to be defective. If both the compressor and the inverter are found to be defective, replace the defective component(s) of both devices.
  • Page 230 [ 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 LED Monitor 4250, 4255, 4220, 4225, 4230, 4240,4260, 5301, 0403 Display on the Outdoor Unit Board. Take appropriate measures to the error code and the error details in ac- cordance with IX [2] Responding to Error Display on the Remote Con- troller.
  • Page 231 [ 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 232 [ IX Troubleshooting ] Items to be checked Phenomena Remedy Put the outdoor unit into oper- Overcurrent-related problems oc- a. Check items [1] through [3] Check whether ation. cur immediately after compressor for problems. the inverter is Check the inverter output volt- startup.
  • Page 233 [ 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 234 [ 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 235 [ 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 236: Indoor Unit

    [ IX Troubleshooting ] Control Circuit -8- 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 Compressor Smoothing capacitor Inverter Noise filter Rectifier AC 380/ 415V Fuse...
  • Page 237 [ 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 238: Refrigerant Leak

    [ IX Troubleshooting ] [5] Refrigerant Leak 1. Leak spot: In the case of extension pipes and HBC controller (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 high-pressure side refrigerant service valve (BV2) on the outdoor unit while the com- pressor is being stopped.
  • Page 239 [ IX Troubleshooting ] 3. Leak spot: In the case of extension pipe and HBC controller (Heating season) (1) Run all the indoor units in heating test run mode. 1) To run the indoor unit in test run mode, turn SW3-2 from ON to OFF when SW3-1 on the outdoor control board is ON. 2) Change the setting of the remote controller for all the indoor units to the heating mode.
  • Page 240: Compressor Replacement Instructions

    [ IX Troubleshooting ] [6] Compressor Replacement Instructions 1. Compressor Replacement Instructions [Compressor replacement procedures] Follow the procedures below (Steps 1 through 5) to remove the compressor components and replace the compressor. Reassemble them in the reverse order after replacing the compressor. 1.
  • Page 241 [ 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 242 SV4c, SV4d), Check valve (CV4a, CV6a, CV8a, CV9a, CV10a). Replace them properly according to the procedures. 1. Applicable models • PURY-WP200, 250YJM-A (-BS) 2. Parts to be serviced, Set-content Following instructions are applicable to 1-4 service parts on the table below.
  • Page 243 [ IX Troubleshooting ] 2) Remove the control box and the partition plate. 1) Remove the upper and lower service panels (Panel FU and FB). 3) Remove the cable that is fixed to the Frame ASSY MU (upper) and MB (lower), and remove the Frame ASSY MU and MB.
  • Page 244 [ IX Troubleshooting ] (2) Check valve (CV4a, CV6a, CV8a, CV9a, CV10a) replacement procedures Remove the solenoid valve block ASSY following "(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement procedures" on the front page. Debraze I-O parts (total 7 places), and remove the Check valve ASSY. Replace the Check valve (CV4a, CV6a, CV8a, CV9a, CV10a) to be serviced while it is removed from the unit.
  • Page 245 [ IX Troubleshooting ] Detailed View of Part A Brazing or debrazing pipes Check valve replacement (ø15.88 [5/8"]) (ø28.6 [1-1/8"]) When replacing CV4a: Remove the brazing CV6a CV4a (ø15.88 [5/8"]) When replacing CV6a: Remove the brazing (ø28.6 [1-1/8"]) (ø22.2 [7/8"]) When replacing CV8a: (ø15.88 [5/8"]) Remove the brazing 3...
  • Page 246: Servicing The Hbc Controller

    [ IX Troubleshooting ] [7] Servicing the HBC controller 3-way valve 1. 3-way valve, Refrigerant flow adjust valve MV1 and MV2 (3-way valves) and FCV (water flow rate control valve) are driven by the pulse signal from the HBC controller control board and are controlled by a stepping motor.
  • Page 247 [ IX Troubleshooting ] 4) Opening and closing of the valve Closing the valve Opening the valve -100 1100 1300 1500 Number of pulses Water pump 2. Water pump Check the connector and make sure that it is connected properly. Check the driving power supply, control power supply for the pumps internal board, and check the control signal voltage by connecting each voltage to ground.
  • Page 248: Troubleshooting Using The Outdoor Unit Led Error Display

    [ IX Troubleshooting ] [8] 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.(page 133) 2.
  • Page 249: Instructions For Debris Removal Operation

    [ IX Troubleshooting ] [9] Instructions for debris removal operation This operation removes the debris that may have been introduced during installation from the water circuit. Perform this operation after completion of water- and refrigerant-piping work, air tightness test, evacuation of refrigerant circuits, refrigerant charging, and electrical work.
  • Page 250: Instructions For The Air Vent Operation

    [ IX Troubleshooting ] [10] Instructions for the air vent operation This operation removes the air that remains after water is supplied to the water circuit. Perform this operation after completion of water- and refrigerant-piping work, air tightness test, evacuation of refrigerant circuits, and refrigerant charging (and debris removal, if performed).
  • Page 251: Instructions For The Water Pump Replacement

    [ IX Troubleshooting ] [11] Instructions for the water pump replacement 1.After turning off the power to the HBC controller, replace the water pump. To stop the water flow from the indoor unit, perform the following DIPSW operations. When replacing the water pump near the water supply port, set DIPSW4-6 to ON (DIPSW4-7 to OFF). When replacing the other water pump, set DIPSW4-6 and DIPSW4-7 to ON.
  • Page 252: 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 ............... 245 HWE1113B - 243 -...
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  • Page 254: 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- Outdoor unit board 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 255 [ 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.
  • Page 256 [ X LED Monitor Display on the Outdoor Unit Board ] -2- HBC controller board 1. How to read the LED The operation status of the unit can be monitored on the service monitor. The service monitor uses 4-digit 7-segment LED to display flags. There are no check items using dipswitch settings.
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  • Page 301 Service Handbook Model PURY-WP200, WP250YJM-A CMB-WP108V-G http://Global.MitsubishiElectric.com New publication effective Aug. 2014 Specifications subject to change without notice HWE1113B...

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