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Mitsubishi Electric PURY-P72 Service Handbook

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Refrigerant Charging
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Outdoor Unit Components and Refrigerant Circuit
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  Also See for Mitsubishi Electric PURY-P72

Mitsubishi Electric PURY-P72 Service Handbook
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Mitsubishi Electric PURY-P72 Service Handbook
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  Summary of Contents for Mitsubishi Electric PURY-P72

  • 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. ŒA 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 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] 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 [7] Servicing the BC controller ....................350 [8] Troubleshooting Using the Outdoor Unit LED Error Display..........353 X LED Monitor Display on the Outdoor Unit Board [1] How to Read the LED on the Service Monitor ..............357 HWE1116D...
  • 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 HWE1116D - 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 TKMU-A, YKMU-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: Piping Materials

    [ I Read Before Servicing ] [3] Piping Materials Do not use the existing piping! 1. Copper pipe materials O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material (Drawn) Hard copper pipes (straight pipes). They are stronger than the O-material (Annealed) 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 (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. Flare processing dimensions (mm[in]) A dimension (mm) Pipe size (mm[in])

  • 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 no inert gas during brazing Use of inert gas during 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 ŒPressurize 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. Triple Evacuation The method below can also be used to evacuate the system. ŒEvacuate the system to 4,000 microns from both service valves. System manifold gauges must not be used to measure vac- uum.

  • 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: Restrictions

    II Restrictions [1] System configuration ....................... 17 [2] Types and Maximum allowable Length of Cables ............18 [3] Switch Settings and Address Settings ................19 [4] Sample System Connection..................... 26 [5] An Example of a System to which an MA Remote Controller is connected..... 28 [6] An Example of a System to which an ME Remote Controller is connected.....
  • Page 25 HWE1116D - 16 -...

  • Page 26: 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. Outdoor Composing units Maximum total capacity Maximum number Types of connectable in- units of connectable indoor...

  • Page 27: 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 28: Switch Settings And Address Settings

    [ 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 *2 *4 2 *2 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 29 [ 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 30 [ II Restrictions ] Unit or controller Sym- Address Setting method Factory setting address range setting System Group remote con- 201 to Assign an address that equals the sum of the smallest controller troller group number of the group to be controlled and 200. System remote con- Assign an arbitrary but unique address within the range troller...
  • Page 31 [ 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 System Design Manual for details.
  • Page 32 [ 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 33 [ 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 34 [ II Restrictions ] (8) 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 SW6-8 on the outdoor units (OC and OS). Dip SW6-8 Demand control switch Input to CN3D*...

  • Page 35: 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 36 [ II Restrictions ] HWE1116D - 27 -...

  • Page 37: 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 38 [ II Restrictions ] ŒSet one of the MA remote controllers as a sub controller. (4) Wiring method (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 39 [ 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 40 [ 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 41 [ 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 SW5-1 OFF CN41 as it is.
  • Page 42 [ II Restrictions ] (4) Wiring method moved from CN41 to CN40, central control is not possible, even if TB7's are daisy-chained.) 1) Indoor/outdoor transmission line c) When connecting TB7, only commence after checking that the voltage is below 20 VDC. Same as [5] 2.
  • Page 43 [ 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 44 [ II Restrictions ] moved from CN41 to CN40, central control is not possible, (4) Wiring method even if TB7's are daisy-chained.) 1) Indoor/outdoor transmission line c) When connecting TB7, only commence after checking that the voltage is below 20 VDC. Same as [5] 2.
  • Page 45 [ 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 SW5-1 OFF ON connector on CN41 as it is.
  • Page 46 [ II Restrictions ] daisy-chained, connect the transmission line for the central control (4) Wiring method system to TB7 of the OC. (Note a).To maintain the central control even during an OC failure or a power failure, connect TB7 on OC 1) Indoor/outdoor transmission line and OS together.
  • Page 47 [ II Restrictions ] 6. A system with multiple BC controller connections (with a system controller connected to the centralized control line) (1) Sample control wiring Leave the male Move the male connector connector on from CN41 to CN40 CN41 as it is. SW5-1 OFF ON Group Group...
  • Page 48 [ II Restrictions ] cuit are not daisy-chained, connect the transmission line (4) Wiring method for the central control system to TB7 of the OC. (Note 1) Indoor/outdoor transmission line a).To maintain the central control even during an OC fail- ure or a power failure, connect TB7 on OC and OS to- Daisy-chain terminals M1 and M2 of the terminal block gether.
  • Page 49 [ II Restrictions ] (5) Address setting method Pro- Fac- Address tory Unit or controller setting Setting method Notes set- range ting ŒAssign the smallest address to the main unit in the ŒPort number setting is re- Indoor Main unit IC 01 to 50 group.
  • Page 50 [ II Restrictions ] HWE1116D - 41 -...

  • Page 51: 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 SW5-1 OFF ON CN41 as it is.
  • Page 52 [ 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] 2. Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).

  • Page 53: 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 SW5-1 OFF ON CN41 as it is.
  • Page 54 [ II Restrictions ] Shielded cable connection (3) Maximum allowable length Same as [5] 2. 1) Indoor/outdoor transmission line 2) Transmission line for centralized control Same as [5] 3. Same as [5] 4. 2) Transmission line for centralized control Shielded cable connection Same as [5] 4.
  • Page 55 [ II Restrictions ] (5) Address setting method Pro- dress Facto- Unit or controller set- Setting method Notes ry set- dure ting ting range ŒAssign the smallest address to ŒAssign an address smaller than that of Opera- Main 01 to the main unit in the group.

  • Page 56: Restrictions On Pipe Length

    [ II Restrictions ] [8] Restrictions on Pipe Length (1) System that requires 16 BC controller ports or fewer <System with only the main BC controller or standard BC con- troller> Outdoor unit *Use a main BC controller when connecting the outdoor units of P144 model or above.
  • Page 57 [ II Restrictions ] Restrictions on pipe length [PURY-P72, P96TKMU-A, PURY-P72, P96YKMU-A] The height difference and the pipe length between BC controller and indoor units 1000 [229] [3280] [2952] [196] [2624] [164] [2296] [131] [1968] [98] [1640] [64] [1312] [32]...
  • Page 58 [ II Restrictions ] (2) System that requires more than 16 BC controller ports or with multiple BC controllers <Outdoor unit P144 model or below.> Outdoor unit Branch joint Indoor (CMY-Y202-G2) (CMY-Y102L-G2) (CMY-Y102S-G2) BC controller (sub) BC controller (main) Branch joint (CMY-Y102S-G2) BC controller (sub) Reducer (P06 - P18 models)
  • Page 59 [ II Restrictions ] 1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes will be used between the main and the sub BC controllers. 2) When connecting two sub BC controllers, observe the maximum allowable length in the table above. 3) When connecting two sub BC controllers, install them in parallel.
  • Page 60 [ II Restrictions ] (3) System that requires more than 16 BC controller ports or with multiple BC controllers <Outdoor unit P168 model or above.> Branch joint (CMY-R100VBK) Outdoor unit The distributor on the low-pressure side must be placed in the outdoor unit that has a larger capacity Outdoor unit index of the two, regardless of the relative positions of the outdoor units or their addresses.
  • Page 61 [ II Restrictions ] 1) A system that requires more than 16 BC controller ports requires two or three BC controllers (main and sub), and three pipes will be used between the main and the sub BC controllers. 2) When connecting two sub BC controllers, observe the maximum allowable length in the table above. 3) When connecting two sub BC controllers, install them in parallel.
  • Page 62 [ II Restrictions ] 1. Refrigerant pipe size (1) Between outdoor unit and the first twinning pipe (Part A) Unit : mm [inch] Refrigerant pipe size Connection to outdoor unit and BC controller Outdoor units Low-pressure pipe High-pressure pipe Low-pressure pipe High-pressure pipe ø19.05 [3/4"] ø15.88 [5/8"]...
  • Page 63 [ II Restrictions ] 2. Connecting the BC controller (1) Size of the pipe that fits the standard BC controller ports P72 - P120 models Connection: Brazed connection To outdoor unit BC controller Reducer Branch joint (Model name:CMY-Y102S-G2) Junction pipe kit (Standard (Optional accessory) (Model name:...
  • Page 64 [ II Restrictions ] 1) To connect P06 - P18 models of indoor units use 2) To connect P72 - P96 models of indoor units (or when the the reducer that is supplied with the BC controller. total capacity of indoor units exceeds P55), use a junction pipe kit and merge the two nozzles.
  • Page 65 [ II Restrictions ] (2) Size of the pipe that fits the main BC controller ports P72 - P288 models Branch joint (Model name:CMY-Y102S-G2) (Optional accessory) Connection: Brazed connection To outdoor unit BC controller (main) Reducer (Standard supplied parts) Junction pipe kit (Model name:CMY-R160-J) (Optional accessory) Indoor...
  • Page 66 [ II Restrictions ] (3) Size of the pipe that fits the sub BC controller ports Branch joint (Model name:CMY-Y102S-G2) Connection: Brazed connection (Optional accessory) To Main BC controller Junction pipe kit BC controller (sub) (Model name: CMY-R160-J) (Optional accessory) Reducer (Standard supplied parts) Indoor...
  • Page 67 [ II Restrictions ] HWE1116D - 58 -...

  • Page 68: Outdoor Unit Components

    III Outdoor Unit Components [1] Outdoor Unit Components and Refrigerant Circuit ............61 [2] Control Box of the Outdoor Unit..................65 [3] Outdoor Unit Circuit Board....................70 [4] BC Controller Components ....................81 [5] Control Box of the BC Controller..................84 [6] BC Controller Circuit Board....................
  • Page 69 HWE1116D - 60 -...

  • Page 70: 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-P72, P96TKMU-A PURY-P72, P96YKMU-A Fan guard Fan guard Transformer box Transformer box (YKMU-A only) (YKMU-A only)
  • Page 71 [ III Outdoor Unit Components ] (2) PURY-P120, P144TKMU-A PURY-P120, P144YKMU-A Fan guards Fan guards Fans Fans Side panel Side panel Fin guard Fin guard Control box Control box Fan box Fan box Heat exchanger Heat exchanger Transformer box Transformer box (YKMU-A only) (YKMU-A only) Side panel...
  • Page 72 [ III Outdoor Unit Components ] 2. Refrigerant circuit (1) PURY-P72, P96TKMU-A PURY-P72, P96YKMU-A Solenoid valve (SV9) High-pressure switch Low-pressure sensor (63H1) High-pressure sensor (63HS1) (63LS) 4-way valve (21S4a) Transformer box Transformer box Check valve (YKMU-A only) (YKMU-A only) (CV7a)
  • Page 73 [ III Outdoor Unit Components ] (2) PURY-P120, P144TKMU-A PURY-P120, P144YKMU-A High-pressure switch Solenoid valve (SV9) (63H1) Low-pressure check joint Low-pressure High-pressure Solenoid valve block sensor sensor High-pressure check joint (SV4d, SV4b, SV4a) (63LS) (63HS1) Compressor cover Check valve (CV7a) 4-way valve (21S4a) 4-way valve...

  • Page 74: 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 75 [ III Outdoor Unit Components ] 2. PURY-P96, P120, P144TKMU-A Rush current FAN INV board protection resistor INV board Control board (R1) Note 2 DC reactor (DCL) Electromagnetic contactor (72C) Diode stack Noise filter Note 2 Current sensor (DCCT1) Terminal block M-NET board for power supply (TB1)
  • Page 76 [ III Outdoor Unit Components ] 3. PURY-P72, P96, P120, P144YKMU-A Capacitor Electromagnetic relay Rush current protection resistor (72C) (C100) (R1, R5) Note 2 Control board FAN INV board DC reactor (DCL) Noise filter Note 2 M-NET board Terminal block...
  • Page 77 [ III Outdoor Unit Components ] 4. Transformer Box (PURY-P72, P96, P120, P144YKMU-A) Transformer (T03) Transformer (T02) HWE1116D - 68 -...
  • Page 78 [ III Outdoor Unit Components ] 5. Fan Box (PURY-P120, P144TKMU-A) (PURY-P120, P144YKMU-A) FAN INV board Connector board Note 1 1) Handle the fan box with care. If the front or the bottom panel becomes damaged, water or dust may enter the fan box, dam- aging its internal parts.

  • Page 79: Outdoor Unit Circuit Board

    [ III Outdoor Unit Components ] [3] Outdoor Unit Circuit Board 1. Outdoor unit control board (208/230 VAC) For information about the display of SW4 function settings, refer to sectionVII [1] Functions and Factory Settings of the Dipswitches(page 137) HWE1116D - 70 -...
  • Page 80 [ III Outdoor Unit Components ] 2. M-NET board CNIT CNS2 CN102 12VDC Input Transmission line Power supply output for centralized input/output for control system (30VDC) 5VDC Input centralized control CN04 Indoor/outdoor transmission line Power supply system (30VDC) Bus voltage input input/output (30VDC) detection output Power supply...
  • Page 81 [ III Outdoor Unit Components ] 3. INV board (1) PURY-P72TKMU-A LED4 Lit during normal CNFAN CNVDC CPU operation Serial signal output Bus voltage output Bus voltage output GND (FAN INV board) F001 17VDC input LED1 Fuse Serial communication signal input 17VDC output Inverter in normal operation (Lit) 250 VAC 3.15A...
  • Page 82 [ III Outdoor Unit Components ] (2) PURY-P96, P120, P144TKMU-A 1) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the ter- minals to remove them. 2) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. 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 capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
  • Page 83 [ III Outdoor Unit Components ] (3) PURY-P72, P96, P120, P144YKMU-A 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. 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 capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
  • Page 84 [ III Outdoor Unit Components ] 4. Fan board (1) PURY-P72, P96, P120, P144TKMU-A 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. 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 capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.
  • Page 85 [ III Outdoor Unit Components ] (2) PURY-P72, P96, P120, P144YKMU-A 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. 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 capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.

  • Page 86: Noise Filter

    [ III Outdoor Unit Components ] 5. Noise Filter (1) PURY-P72TKMU-A TB32 CN110 Bus voltage input (P) Power supply detection Ground CN72C signal output 72C drive signal input X001 CN012 Electromagnetic Output relay (72C) TB31 Bus voltage output (P) CNR1 Rush current protection F001...
  • Page 87 [ III Outdoor Unit Components ] (2) PURY-P96, P120, P144TKMU-A F003 CN110 TB31 Fuse CN72C Power supply detection Bus voltage output (P) Ground 250 VAC 6.3A T 72C drive input signal output X001 Electromagnetic relay (72C) CNR1 Rush current protection registor (R1) connection TB42 Bus voltage output (N)
  • Page 88 [ III Outdoor Unit Components ] (3) PURY-P72, P96, P120, P144YKMU-A Output Output (Rectified L2-L3 current) (Rectified L2-L3 current) Input Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding F1,F2,F3,F4 Fuse 250VAC 6.3A Grounding CN1A Input CN1B TB21...
  • Page 89 [ III Outdoor Unit Components ] 6. Connect board 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. 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 capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.

  • Page 90: Bc Controller Components

    [ III Outdoor Unit Components ] [4] BC Controller Components 1. CMB-P NU-G, GA, HA (1) Front Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) (2) Rear view <G type> TH11 SVM1 LEV3 LEV1 Gas/Liquid separator TH16 Tube in tube heat exchanger TH12 TH15 HWE1116D...
  • Page 91 [ III Outdoor Unit Components ] (3) Rear view <GA type> TH16 LEV2 LEV3 TH11 LEV1 SVM2 Gas/Liquid separator Tube in tube heat exchanger SVM1 TH12 TH15 (4) Rear view <HA type> Gas/Liquid separator LEV3 LEV1 LEV2 SVM2 SVM2b SVM1b SVM1 TH16 TH15...
  • Page 92 [ III Outdoor Unit Components ] 2. CMB-P NU-GB, HB (1) Front Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) (2) Rear view TH12 LEV3 TH15 HWE1116D - 83 -...

  • Page 93: Control Box Of The Bc Controller

    [ III Outdoor Unit Components ] [5] Control Box of the BC Controller 1. CMB-P1016NU-G, GA, HA Transformer Terminal block for power supply Terminal block for transmission line Relay board BC controller board HWE1116D - 84 -...

  • Page 94: Bc Controller Circuit Board

    [ III Outdoor Unit Components ] [6] BC Controller Circuit Board 1. BC controller circuit board (BC board) HWE1116D - 85 -...
  • Page 95 [ III Outdoor Unit Components ] 2. RELAY BOARD (RELAY 4 board) 3. RELAY BOARD (RELAY 10 board) HWE1116D - 86 -...

  • Page 96: Remote Controller

    IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers ........89 [2] Group Settings and Interlock Settings via the ME Remote Controller ......90 [3] Interlock Settings via the MA Remote Controller ............. 94 [4] Using the built-in Temperature Sensor on the Remote Controller ........95 HWE1116D - 87 -...
  • Page 97 HWE1116D - 88 -...

  • Page 98: 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 99: 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 100 [ 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, following step to go back to the normal display.
  • Page 101 [ 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 102 [ 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 [MODE] simultaneously for 2 seconds to go into the operation mode display selection mode under the remote controller function selection mode.

  • Page 103: 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-21MAAU) * 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 104: 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 105 [ IV Remote Controller ] HWE1116D - 96 -...

  • Page 106: Electrical Wiring Diagram

    V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit ..............99 [2] Electrical Wiring Diagram of the BC Controller .............. 104 [3] Electrical Wiring Diagram of Transmission Booster............114 HWE1116D - 97 -...
  • Page 107 HWE1116D - 98 -...

  • Page 108: 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-P72TKMU-A HWE1116D - 99 -...
  • Page 109 [ V Electrical Wiring Diagram ] (2) PURY-P96TKMU-A HWE1116D - 100 -...
  • Page 110 [ V Electrical Wiring Diagram ] (3) PURY-P120, P144TKMU-A HWE1116D - 101 -...
  • Page 111 [ V Electrical Wiring Diagram ] (4) PURY-P72, P96YKMU-A PURY-P72,96YKMU-A(-BS) HWE1116D - 102 -...
  • Page 112 [ V Electrical Wiring Diagram ] (5) PURY-P120, P144YKMU-A PURY-P120,144YKMU-A(-BS) HWE1116D - 103 -...

  • Page 113: Electrical Wiring Diagram Of The Bc Controller

    [ V Electrical Wiring Diagram ] [2] Electrical Wiring Diagram of the BC Controller (1) CMB-P104NU-G model HWE1116D - 104 -...
  • Page 114 [ V Electrical Wiring Diagram ] (2) CMB-P105,106NU-G models HWE1116D - 105 -...
  • Page 115 [ V Electrical Wiring Diagram ] (3) CMB-P108,1010NU-G models HWE1116D - 106 -...
  • Page 116 [ V Electrical Wiring Diagram ] (4) CMB-P1013,1016NU-G models HWE1116D - 107 -...
  • Page 117 [ V Electrical Wiring Diagram ] (5) CMB-P108,1010NU-GA models HWE1116D - 108 -...
  • Page 118 [ V Electrical Wiring Diagram ] (6) CMB-P1013,1016NU-GA models LEV3 LEV2 HWE1116D - 109 -...
  • Page 119 [ V Electrical Wiring Diagram ] (7) CMB-P104NU-GB model HWE1116D - 110 -...
  • Page 120 [ V Electrical Wiring Diagram ] (8) CMB-P108NU-GB model HWE1116D - 111 -...
  • Page 121 [ V Electrical Wiring Diagram ] (9) CMB-P1016NU-HA model HWE1116D - 112 -...
  • Page 122 [ V Electrical Wiring Diagram ] (10) CMB-P1016NU-HB model HWE1116D - 113 -...

  • Page 123: Electrical Wiring Diagram Of Transmission Booster

    [ V Electrical Wiring Diagram ] [3] Electrical Wiring Diagram of Transmission Booster Terminal block for power supply (TB1) 250V 2A Red Red Red Black White White Green/Yellow AC208V/230V Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply Blue Black...

  • Page 124: Refrigerant Circuit

    VI Refrigerant Circuit [1] Refrigerant Circuit Diagram ................... 117 [2] Principal Parts and Functions ..................125 HWE1116D - 115 -...
  • Page 125 HWE1116D - 116 -...

  • Page 126: Refrigerant Circuit Diagram

    [ VI Refrigerant Circuit ] VI Refrigerant Circuit [1] Refrigerant Circuit Diagram 1. Outdoor unit (1) PURY-P72, P96 models 21S4a Solenoid valve block SV4d SV4a SV4b ST17 63H1 63HS1 CV7a LEV5a 63LS SV1a CV3a CV2a CV5a SV5b CV8a CV9a COMP...
  • Page 127 [ VI Refrigerant Circuit ] (2) PURY-P120, P144 models 21S4b SV4c CV7b 21S4a Solenoid valve block SV4d CV7a ST17 SV4a SV4b 63H1 LEV5a 63HS1 LEV5b 63LS SV1a CV8a CV5a SV5b CV4b CV5b CV2b COMP CV2a CV3a CV6b CV6a CV4a HWE1116D - 118 -...
  • Page 128 [ VI Refrigerant Circuit ] (3) PURY-P144, P168, P192 models 21S4a Solenoid valve block SV4d SV4a SV4b ST17 63H1 63HS1 CV7a LEV5a 63LS SV1a CV3a CV2a CV5a SV5b CV8a CV9a COMP CV6a CV4a 21S4a Solenoid valve block SV4d SV4a SV4b ST17 63H1 63HS1...
  • Page 129 [ VI Refrigerant Circuit ] (4) PURY-P216 model 21S4a Solenoid valve block SV4d SV4a SV4b ST17 63H1 63HS1 CV7a LEV5a 63LS SV1a CV3a CV2a CV5a SV5b CV8a CV9a COMP CV6a Low-pressure CV4a side distributor High-pressure side junction pipe 21S4b SV4c CV7b 21S4a Solenoid valve block...
  • Page 130 [ VI Refrigerant Circuit ] (5) PURY-P240, P264, P288 models 21S4b SV4c CV7b 21S4a Solenoid valve block SV4d CV7a ST17 SV4a SV4b 63H1 LEV5a 63HS1 LEV5b 63LS SV1a CV8a CV5a SV5b CV4b CV5b CV2b COMP CV2a CV3a CV6b CV6a CV4a Low-pressure side distributor 21S4b...
  • Page 131 [ VI Refrigerant Circuit ] 2. BC controller (1) CMB-P104 - P1016NU-G Solenoid valve block TH15 Gas/Liquid separator LEV3 TH12 TH11 LEV1 TH16 Check valve block SVM1 HWE1116D - 122 -...
  • Page 132 [ VI Refrigerant Circuit ] (2) CMB-P108, P1010, P1013, P1016NU-GA (main) Solenoid valve block TH15 Gas/Liquid LEV3 separator SVM2 TH12 TH11 LEV1 TH16 LEV2 Check valve block SVM1 (3) CMB-P104, P108NU-GB (sub) Solenoid valve block TH12 TH15 LEV3 HIC-C Check valve block HWE1116D - 123 -...
  • Page 133 [ VI Refrigerant Circuit ] (4) CMB-P1016V-HA (main) SVA,SVB,SVC TH15 Gas/Liquid SVM2 separator LEV3 SVM2b TH12 HIC-B TH11 LEV1 TH16 HIC-A LEV2 SVM1 SVM1b (5) CMB-P1016NU-HB (sub) Solenoid valve block TH12 TH15 LEV3 HIC-C Check valve block HWE1116D - 124 -...

  • Page 134: 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 P72 model pressor (Comp1) refrigerant by adjusting the operat- Low-pressure shell scroll ing frequency based on the oper- compressor ating pressure data...
  • Page 135 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermis- Controls defrosting during heating Degrees Celsius Resistance check (Pipe operation = 15k temperature) = 3460 0/80 R = 15 3460 1) Detects outdoor air tempera- (Outdoor tem- ture perature)
  • Page 136 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Fan mo- FAN motor FAN mo- Regulates the heat exchanger ca- (TKMU) tor 2 is pacity by adjusting the operating AC200-230V, 920W only on frequency and operating the pro- (YKMU) the P120 peller fan based on the operating...
  • Page 137 [ 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 138 [ VI Refrigerant Circuit ] 3. BC controller (1) G type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 1) Detects high pressure Pressure sensor (High pres- 2) LEV control 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa]...
  • Page 139 [ VI Refrigerant Circuit ] (2) GA type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 1) Detects high pressure Pressure sensor (High pres- 2) LEV control 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa] Con-...
  • Page 140 [ VI Refrigerant Circuit ] (3) GB type Symbols Part Part name Usage Specifications Check method (functions) code Thermistor TH12 LEV control (Superheat) (Bypass = 15k outlet tem- = 3460 0/80 perature) R = 15 3460 TH15 LEV control (Superheat) 0°C[32°F] : 15kohm (Bypass in- 10°C[50°F] :9.7kohm...
  • Page 141 [ VI Refrigerant Circuit ] (4) HA type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 1) Detects high pressure Pressure sensor (High pres- 2) LEV control 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa] Con-...
  • Page 142 [ VI Refrigerant Circuit ] (5) HB type Symbols Part Part name Usage Specifications Check method (functions) code Thermistor TH12 LEV control (Superheat) (Bypass = 15k outlet tem- = 3460 0/80 perature) R = 15 3460 TH15 LEV control (Superheat) 0°C[32°F] : 15kohm (Bypass in- 10°C[50°F] :9.7kohm...
  • Page 143 [ VI Refrigerant Circuit ] HWE1116D - 134 -...

  • Page 144: Control

    VII Control [1] Functions and Factory Settings of the Dipswitches ............137 [2] Controlling the Outdoor Unit ..................144 [3] Controlling BC Controller ....................158 [4] Operation Flow Chart..................... 159 HWE1116D - 135 -...
  • Page 145 HWE1116D - 136 -...

  • Page 146: 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 Function according to switch setting Units that require Switch Function Switch setting timing switch setting (Note 2) Unit address set- Set to 00 or 51-100 with the dial switch Before power on ting...
  • Page 147 [ VII Control ] Function according to switch setting Units that require Switch Function Switch setting timing switch setting OFF (LED3 Unlit) ON (LED3 Lit) (Note 2) Self-diagnosis/operation Refer to the LED monitor display on the out- SW6-10: 1-10 Anytime after power on monitor door unit outdoor unit board.
  • Page 148 [ VII Control ] (2) INV board 1) PURY-P72, P96, P120, P144YKMU-A Functions are switched with the following connector. Function according to connec- Connector Function Setting timing Enabled Disabled CN6 short- Enabling/disabling the following error Error detec- Error detec- Anytime after power on circuit con- detection functions;...
  • Page 149 [ VII Control ] (3) Fan INV board (Control box side, Fan box side) Function according to switch setting Switch Function Switch setting timing Enabling/Disabling no-load opera- No-load oper- No-load oper- Anytime after power on tion ation disabled ation enabled No-load operation will continue for approximately 30 seconds, and then the unit will come to an ab-...
  • Page 150 [ 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 151 [ VII Control ] 3. Function of the switch <Remote controller> (1) MA remote controller (PAR-20MAU) The SW is located at the bottom of the remote controller under the cover. Operate the switches to perform the remote con- troller main/sub setting or other function settings. Normally, do not change the settings of switches other than the SW1 (main/ sub switching switch).
  • Page 152 [ VII Control ] (2) ME remote controller (PAR-F27MEA-US) 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 153: Controlling The Outdoor Unit

    [ VII Control ] [2] Controlling the Outdoor Unit Outline of Control Method -1- Outline of Control Method ŒThe outdoor units are designated as OC and OS 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).
  • Page 154 [ VII Control ] Bypass Control -5- 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 starting-up the compressor of each ON for 4 minutes.
  • Page 155 [ VII Control ] Compressor Frequency Control -6- Compressor Frequency Control ŒDepending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.
  • Page 156 [ VII Control ] Defrost Operation Control -7- Defrost Operation Control (1) Starting the defrost operation ŒThe defrost cycle will start when all of the three conditions (outside temperature, cumulative compressor operation time, and pipe temperature) under <Condition 1>, <Condition 2>, or <Condition 3> are met. Condition 1 Condition 2 Condition 3...
  • Page 157 [ VII Control ] (2) Defrost operation Outdoou unit Compressor frequency Model Compressor frequency P72 model 79Hz P96 model 107Hz P120, P144 models 107Hz Outdoor unit fan Stopped SV1a ON (open) SV5b ON (closed) 21S4a, 21S4b OFF (closed) BC controller LEV1 G type: 4000, GA type: 6000, HA type: 8000 LEV3...
  • Page 158 [ VII Control ] Refrigerant Recovery Control -8- Refrigerant Recovery Control Refrigerant recovery is performed for each BC port during heating operation to prevent the refrigerant from accumulating in- side the units that are stopped (in the fan mode), in the cooling mode, or in the heating Thermo-OFF mode. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.
  • Page 159 [ VII Control ] Evaporting control (Linear expansion valve <LEV5a, b>) -10- Evaporting temperature control (Linear expansion valve <LEV5a, b>) (1) LEV5 control will begin when all of the following conditions are met. ŒUnits are operated in the Heating-Main mode. Œ15 minutes have passed after the compressor started up.
  • Page 160 [ VII Control ] (2) P144, P168, P192, P216, P240, P264, P288 models (As for P144, only the YKMU series is applicable.) 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 P96 or above.
  • Page 161 [ VII Control ] Emergency Operation Mode -12- Emergency Operation Mode 1. Problems with the outdoor unit ŒThe P144 through P240 models of unit have a mode that allows the outdoor unit to perform an emergency operation when the other outdoor unit in the system malfunctions. (As for the P144 model, only the YKMU series is applicable.) ŒThis mode can be started by performing an error reset via the remote controller.
  • Page 162 [ 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 163 [ VII Control ] Control Method -13- Control Method The control system configuration for the PURY models is shown in the chart below. Daisy-chained Non-polar 2-wire Data signal exchange non-polar 2-wire serial communication between system equipment method transmission line 16-bit CPU Calculation, processing microcomputer operation processing...
  • Page 164 [ VII Control ] Cooling/heating Circuit Control and General Function of System Equipment -14- Cooling/heating Circuit Control and General Function of System Equipment Operation Schematic diagram of refrigerant circuit Two-phase Schematic diagram of refrigerating cycle status Liquid 4-way valve Check valve Selector valve Low- Pressure...
  • Page 165 [ VII Control ] Operation Mode -15- 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 166 [ VII Control ] DEMAND Control -16- DEMAND Control Cooling/heating operation can be prohibited (Thermo-OFF) by an external input to the indoor units. When DIP SW6-8 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.

  • Page 167: Controlling Bc Controller

    [ VII Control ] [3] Controlling BC Controller 1. Control of SV A, SV B, and SV A, SV B, and SV C turn on or off depending on the operation mode of the branch. Mode Cooling Heating Stopped Defrost SV A Port SV B...

  • Page 168: 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. Indoor unit LEV fully closed. *Note 2 Remote controller Error mode...
  • Page 169 [ 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 on the remote controller *Note 1 Indoor units registered to the remote controller...
  • Page 170 [ VII Control ] (3) BC 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 171 [ 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 172 [ 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 173 [ 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 174: Test Run Mode

    VIII Test Run Mode [1] Items to be checked before a Test Run ................. 167 [2] Test Run Method ......................168 [3] Operating Characteristic and Refrigerant Amount ............169 [4] Adjusting the Refrigerant Amount .................. 169 [5] Refrigerant Amount Adjust Mode................... 172 [6] The following symptoms are normal.
  • Page 175 HWE1116D - 166 -...

  • Page 176: 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) 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 177: Test Run Method

    [ VIII Test Run Mode ] [2] Test Run Method The figure shows an MA remote controller (PAR-21MAAU). 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 178: 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 179 [ 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 P120 P144...
  • Page 180 [ VIII Test Run Mode ] 1) Maximum refrigerant charge There is a limit to the amount of refrigerant that can be charged into a unit. Regardless of the amount yielded by the formula above, observe the maximum refrigerant charge in the table below. Total index of the outdoor units P120 P144...

  • Page 181: Refrigerant Amount Adjust Mode

    [ VIII Test Run Mode ] [5] Refrigerant Amount Adjust Mode 1. Procedures Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch (SW4 (922)) on the main board on the outdoor unit (OC only) is turned to ON, the unit goes into the refrigerant amount adjust mode, and the following sequence is followed.
  • Page 182 [ VIII Test Run Mode ] Start Turn on SW4 (922) on the OC. Operation of the Refrigerant Amount Adjust Mode Put all indoor units in the test run mode When the unit is the refrigerant amount adjust mode, the LEV on the and run the units in cooling mode.

  • Page 183: 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 on the same refrigerant system, are performing a cooling (heating) operation.

  • Page 184: Standard Operation Data (Reference Data)

    [ VIII Test Run Mode ] [7] Standard Operation Data (Reference Data) 1. Single unit (1) Cooling only operation Outdoor unit model Operation PURY-P72T(Y)KMU-A PURY-P96T(Y)KMU-A Model name of BC controller CMB-P104NU-G CMB-P104NU-G 26.7°C/19.4°C 26.7°C/19.4°C Indoor Ambient [80 °F/67 °F] [80 °F/67 °F] tempera- DB/WB 35°C/í...
  • Page 185 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P120T(Y)KMU-A PURY-P144T(Y)KMU-A Model name of BC controller CMB-P104NU-G CMB-P108NU-GA 26.7°C/19.4°C 26.7°C/19.4°C Indoor Ambient [80 °F/67 °F] [80 °F/67 °F] tempera- DB/WB 35°C/í 35°C/í ture Outdoor [95 °F/í] [95 °F/í] No. of connected units Unit Indoor unit No.
  • Page 186 [ VIII Test Run Mode ] (2) Heating only operation Outdoor unit model Operation PURY-P72T(Y)KMU-A PURY-P96T(Y)KMU-A Model name of BC controller CMB-P104NU-G CMB-P104NU-G 21.1°C/í 21.1°C/í Indoor Ambient [70 °F/-] [70 °F/-] tempera- DB/WB 8.3°C/6.1°C 8.3°C/6.1°C ture Outdoor [47 °F/43 °F] [47 °F/43 °F] No.
  • Page 187 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P120T(Y)KMU-A PURY-P144T(Y)KMU-A Model name of BC controller CMB-P104NU-G CMB-P108NU-GA 21.1°C/í 21.1°C/í Indoor Ambient [70 °F/í] [70 °F/í] tempera- DB/WB 8.3°C/6.1°C 8.3°C/6.1°C ture Outdoor [47 °F/43 °F] [47 °F/43 °F] No. of connected units Unit Indoor unit No.
  • Page 188 [ VIII Test Run Mode ] 2. 2-unit combination (1) Cooling only operation Outdoor unit model Operation PURY-P144YSKMU-A PURY-P72YKMU-A PURY-P72YKMU-A Model name of BC controller CMB-P108NU-GA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No.
  • Page 189 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P168T(Y)SKMU-A PURY-P96T(Y)KMU-A PURY-P72T(Y)KMU-A Model name of BC controller CMB-P108NU-GA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No. of units in operation Model 30/30/36/36/36 Operating...
  • Page 190 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P192T(Y)SKMU-A PURY-P96T(Y)KMU-A PURY-P96T(Y)KMU-A Model name of BC controller CMB-P108NU-GA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No. of units in operation Model 30/30/30/30/36/36 Operating...
  • Page 191 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P216T(Y)SKMU-A PURY-P120T(Y)KMU-A PURY-P96T(Y)KMU-A Model name of BC controller CMB-P1013NU-GA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No. of units in operation Model 36/36/36/36/36/36 Operating...
  • Page 192 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P240T(Y)SKMU-A PURY-P120T(Y)KMU-A PURY-P120T(Y)KMU-A Model name of BC controller CMB-P1013NU-GA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No. of units in operation Model 24/36/36/36/36/36/36 Operating...
  • Page 193 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P264T(Y)SKMU-A PURY-P144T(Y)KMU-A PURY-P120T(Y)KMU-A Model name of BC controller CMB-P1016NU-HA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No. of units in operation Model 24/24/36/36/36/36/36/36 Operating...
  • Page 194 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P288T(Y)SKMU-A PURY-P144T(Y)KMU-A PURY-P144T(Y)KMU-A Model name of BC controller CMB-P1016NU-HA Ambient Indoor 26.7°C/19.4°C [80 °F/67 °F] tempera- DB/WB Outdoor 35°C/í [95 °F/í] ture No. of connected units Unit Indoor unit No. of units in operation Model 36/36/36/36/36/36/36/36 Operating...
  • Page 195 [ VIII Test Run Mode ] (2) Heating only operation Outdoor unit model Operation PURY-P144YSKMU-A PURY-P72YKMU-A PURY-P72YKMU-A Model name of BC controller CMB-P108NU-GA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No.
  • Page 196 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P168T(Y)SKMU-A PURY-P96T(Y)KMU-A PURY-P72T(Y)KMU-A Model name of BC controller CMB-P108NU-GA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No. of units in operation Model 30/30/36/36/36 Operating...
  • Page 197 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P192T(Y)SKMU-A PURY-P96T(Y)KMU-A PURY-P96T(Y)KMU-A Model name of BC controller CMB-P108NU-GA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No. of units in operation Model 30/30/30/30/36/36 Operating...
  • Page 198 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P216T(Y)SKMU-A PURY-P120T(Y)KMU-A PURY-P96T(Y)KMU-A Model name of BC controller CMB-P1013NU-GA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No. of units in operation Model 36/36/36/36/36/36 Operating...
  • Page 199 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P240T(Y)SKMU-A PURY-P120T(Y)KMU-A PURY-P120T(Y)KMU-A Model name of BC controller CMB-P1013NU-GA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No. of units in operation Model 24/36/36/36/36/36/36 Operating...
  • Page 200 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P264T(Y)SKMU-A PURY-P144T(Y)KMU-A PURY-P120T(Y)KMU-A Model name of BC controller CMB-P1016NU-HA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No. of units in operation Model 24/24/36/36/36/36/36/36 Operating...
  • Page 201 [ VIII Test Run Mode ] Outdoor unit model Operation PURY-P288T(Y)SKMU-A PURY-P144T(Y)KMU-A PURY-P144T(Y)KMU-A Model name of BC controller CMB-P1016NU-HA Ambient Indoor 21.1°C/í [70 °F/í] tempera- DB/WB Outdoor 8.3°C/6.1°C [47°F/43°F] ture No. of connected units Unit Indoor unit No. of units in operation Model 36/36/36/36/36/36/36/36 Operating...

  • Page 202: Troubleshooting

    IX Troubleshooting [1] Error Code Lists ......................195 [2] Responding to Error Display on the Remote Controller..........199 [3] Investigation of Transmission Wave Shape/Noise............286 [4] Troubleshooting Principal Parts ..................289 [5] Refrigerant Leak ......................338 [6] Compressor Replacement Instructions................340 [7] Servicing the BC controller ....................
  • Page 203 HWE1116D - 194 -...

  • Page 204: 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 Serial communication error/Panel communication 0403 4305 error 4306 (Note) 1102 1202 Discharge temperature fault 1301 Low pressure fault 1302...
  • Page 205 [ 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 5102...
  • Page 206 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation [115] ACCT sensor fault [116] DCCT sensor fault 5301 4300 [117] ACCT sensor circuit fault [118] DCCT sensor circuit fault [119] Open-circuited IPM/Loose ACCT connector [120]...
  • Page 207 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Function setting error (improper connection of CN- 7113 TYP) 7117 Model setting error 7130 Incompatible unit combination The last digit in the check error codes in the 4000's and 5000's and two-digit detail codes indicate if the codes apply to inverter on fan inverter.

  • Page 208: 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 1: Between the control board and the INV board Detail code 5, 6: Between the control board and the Fan board...
  • Page 209 [ 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 210 [ 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 211 [ 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 212 [ 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 213 [ 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 214 [ 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 215 [ 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 216 [ 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 217 [ IX Troubleshooting ] 2503 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 218 [ 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 219 [ IX Troubleshooting ] 3121 1. Error Code 3121 Out-of-range outside air temperature 2. Error definition and error detection method ŒWhen 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.) ŒThe compressor restarts when the thermistor temperature is -26°C[-15°F] or above (both OC and OS) during error stop.
  • Page 220 [ IX Troubleshooting ] 4102 1. Error Code 4102 (TKMU-A) Open phase 2. Error definition and error detection method ŒAn open phase of the power supply was detected at power on. The open phase of the power supply may not always be detected if a power voltage from another circuit is applied. 3.
  • Page 221 [ IX Troubleshooting ] 1. Error Code 4102 (YKMU-A) Open phase 2. Error definition and error detection method ŒAn open phase of the power supply (L1 phase, L2 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 222 [ 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 223 [ IX Troubleshooting ] 4109 1. Error Code 4109 Indoor unit fan operation error 2. Error definition and error detection method 1) During operation, it has been continuously detected for 100 seconds that the auxiliary relay (X13) for fan fault detection is not excited.
  • Page 224 [ IX Troubleshooting ] 4115 1. Error Code 4115 (TKMU-A) 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...
  • Page 225 [ IX Troubleshooting ] 4116 1. Error Code 4116 RPM error/Motor error 2. Error definition and error detection method ŒLOSSNAY The motor keep running even if the power is OFF. The thermal overload relay is ON. (Only for the three-phase model) ŒIndoor unit If detected less than 180rpm or more than 2000rpm, the indoor unit will restart and keep running for 3 minutes.If detected again, the display will appear.
  • Page 226 [ IX Troubleshooting ] 4220?4225 1. Error Code 4220 4225 (TKMU-A) 4226 Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 160V or less is detected during Inverter operation. (S/W detection) 3. Cause, check method and remedy (1) Power supply environment Find out if there was a (momentary) power failure.
  • Page 227 [ IX Troubleshooting ] For 4226 (For P120-P144 the fan board is applicable.) ŒWhen the inverter is stopped, check the fan board ( CNVDC ) If above 253V, then check as below. 1) Check CN72C voltage Go to (3). 2) Check coil (L1 - L3) connection condition and for connection failure 3) Check wire connections, noise filter, inverter board, connector board, fan board.
  • Page 228 [ IX Troubleshooting ] 1. Error Code 4220 4225 (YKMU-A) 4226 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 Find out if there was a (momentary) power failure.
  • Page 229 [ IX Troubleshooting ] In case of 4226 (For P120 and P144 type units, the fan box's fan board is applicable) ŒCheck the voltage at CNVDC on the Fan board while the inverter is stopped and if it is 420 V or above, check the following items.
  • Page 230 [ IX Troubleshooting ] 1. Error Code 4220 4225 (TKMU-A) 4226 Abnormal bus voltage rise (Detail code 109) 2. Error definition and error detection method If Vdc 400V 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 231 [ IX Troubleshooting ] 1. Error Code 4220 4225 (TKMU-A) 4226 VDC error (Detail code 110) 2. Error definition and error detection method Bus voltage abnormality If Vdc 400V or Vdc 160V is detected. (H/W detection) 3. Cause, check method and remedy Same as detail code No.108 and 109 of 4220 error Refer to section -7- "Inverter (TKMU-A)"...
  • Page 232 [ IX Troubleshooting ] 1. Error Code 4220 4225 (YKMU-A) 4226 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 233 [ IX Troubleshooting ] 4230 1. Error Code 4230 (TKMU-A) Heatsink overheat protection 2. Error definition and error detection method When the heat sink temperature (THHS) remains at or above TOH is detected. Model P72 model 100°C [212°F] P96, P120, P144 models 90°C [194°F] 3.
  • Page 234 [ IX Troubleshooting ] 1. Error Code 4230 (YKMU-A) Heatsink overheat protection 2. Error definition and error detection method When the heat sink temperature (THHS) remains at or above 100°C [212°F] is detected. 3. Cause, check method and remedy Cause Check method and remedy Fan board failure Refer to IX [4] -7- (2) [6], [7], [8].(page 314)
  • Page 235 [ IX Troubleshooting ] 4240 1. Error Code 4240 (TKMU-A) Overload protection 2. Error definition and error detection method If the output current of "(Iac) >Imax (Arms)" or "THHS > TOL" is continuously detected for 10 minutes or more during inverter operation.
  • Page 236 [ IX Troubleshooting ] 1. Error Code 4240 (YKMU-A) Overload protection 2. Error definition and error detection method If the output current of "(Iac) >Imax (Arms)" or "THHS > 95°C [203°F] " is continuously detected for 10 minutes or more during inverter operation.
  • Page 237 [ IX Troubleshooting ] 4250?4250 4255 1. Error Code 4250 4255 (TKMU-A) 4256 IPM error (Detail code 101) 2. Error definition and error detection method In the case of 4250 P72 model Overcurrent is detected by the overcurrent detection resistor (RSH) on the INVboard. P96, P120, P144 models IPM error signal is detected.
  • Page 238 [ IX Troubleshooting ] 1. Error Code 4250 4255 (YKMU-A) 4256 IPM error (Detail code 101) 2. Error definition and error detection method In the case of 4250 Overcurrent is detected by the overcurrent detection resistor (RSH) on the INV board. In the case of 4255 and 4256 IPM error signal is detected.
  • Page 239 [ IX Troubleshooting ] 1. Error Code 4250 (TKMU-A) DCCT overcurrent (H/W detection) (Detail code 103) Instantaneous overcurrent (Detail code 106) Overcurrent (effective value) (Detail code 107) 2. Error definition and error detection method P72 model Overcurrent 71 Apeak or 34 Arms and above is detected by the current sensor. P96, P120, P144 models Overcurrent 106 Apeak or 64 Arms and above is detected by the current sensor.
  • Page 240 [ IX Troubleshooting ] 1. Error Code 4250 (YKMU-A) Instantaneous overcurrent (Detail code 106) Overcurrent (effective value) (Detail code 107) 2. Error definition and error detection method P72 model Overcurrent 38 Apeak or 23 Arms and above is detected by the current sensor. P96, P120, P144 models Overcurrent 56 Apeak or 33 Arms and above is detected by the current sensor.
  • Page 241 [ IX Troubleshooting ] 1. Error Code 4250 4255 4256 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 242 [ 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) 5103 Gas-side pipe temperature sensor (TH23) fault (Indoor unit) Gas-side pipe temperature sensor (TH3) fault (OA processing unit)
  • Page 243 [ 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 244 [ IX Troubleshooting ] 5110 1. Error Code 5110 (TKMU-A) 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 245 [ IX Troubleshooting ] 5111,5112,5115,5116 1. Error Code 5111 Liquid inlet temperature sensor (TH11) fault (BC controller) 5112 Bypass outlet temperature sensor (TH12) fault (BC controller) 5115 LEV3 outlet temperature sensor (TH15) fault (BC controller) 5116 LEV3 inlet temperature sensor (TH16) fault (BC controller) 2.
  • Page 246 [ IX Troubleshooting ] 5201 1. Error Code 5201 High-pressure sensor fault (63HS1) 2. Error definition and error detection method ŒIf 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 247 [ IX Troubleshooting ] 1. Error Code 5201 High-pressure sensor fault (Outdoor unit HPS/BC controller PS1) 5203 Intermediate pressure sensor fault (BC controller PS3) 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 248 [ IX Troubleshooting ] 5301 1. Error Code 5301 (TKMU-A) ACCT sensor fault (Detail code 115) 2. Error definition and error detection method When the formula "output current < 2 Arms" remains satisfied for 10 seconds while the inverter is in operation. 3.
  • Page 249 [ IX Troubleshooting ] 1. Error Code 5301 (TKMU-A) (P96, P120, P144 models only) DCCT sensor fault (Detail code116) 2. Error definition and error detection method When the bus current less than 18 Apeak is detected at startup (6Hz) 3. Cause, check method and remedy Cause Check method and remedy Contact failure...
  • Page 250 [ IX Troubleshooting ] 1. Error Code 5301 (TKMU-A) (P96, P120, P144 models only) 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.
  • Page 251 [ IX Troubleshooting ] 1. Error Code 5301 (TKMU-A) 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 P72 model Cause Check method and remedy...
  • Page 252 [ IX Troubleshooting ] 1. Error Code 5301 (TKMU-A) Faulty ACCT wiring (Detail code 120) 2. Error definition and error detection method Presence of target current cannot be detected during the self-diagnostic operation immediately before startup. (Detection of improperly mounted ACCT sensor) 3.
  • Page 253 [ IX Troubleshooting ] 5305,5306 1. Error Code 5305 5306 Position detection error at startup (Detail code 132) 2. Error definition and error detection method When a motor sensor has detected an error within 10 seconds after the fan motor has gone into operation. 3.
  • Page 254 [ IX Troubleshooting ] 1. Error Code 5305 5306 RPM error before start up (Detail code 134) 2. Error definition and error detection method The fan RPM will not drop to the set RPM. 3. Cause, check method and remedy Cause Check method and remedy Outdoor factors...
  • Page 255 [ 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 256 [ 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 257 [ 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 258 [ IX Troubleshooting ] 6603 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 259 [ 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 260 [ 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 261 [ 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 262 [ 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 263 [ 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 264 [ 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 265 [ 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 266 [ 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 267 [ 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 268 [ IX Troubleshooting ] 6608 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 269 [ IX Troubleshooting ] 6831 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 270 [ IX Troubleshooting ] 6832 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 271 [ IX Troubleshooting ] 6833 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 272 [ IX Troubleshooting ] 6834 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 273 [ 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 274 [ 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 275 [ 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 276 [ 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 277 [ 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 278 [ 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 279 [ IX Troubleshooting ] 7113 1. Error Code 7113 Function setting error (improper connection of CNTYP) 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 280 [ 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 281 [ IX Troubleshooting ] 7130 1. Error Code 7130 Incompatible unit combination 2. Error definition and error detection method The check code will appear when the indoor units for use with a different type of refrigerant or incompatible units are connect- 3.
  • Page 282 [ 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 283 [ 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 284 [ 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 285 [ 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. HWE1116D - 276 -...
  • Page 286 [ 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 287 [ 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 (AC208/230V) is not on.
  • Page 288 [ 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 289 [ 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 290 [ 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 291 [ 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 292 [ 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 293 [ 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 296) (not enough opening). Temperature reading error on the indoor unit piping Check the thermistor.
  • Page 294 [ 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 SW4.

  • Page 295: 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 296 [ 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 297 [ 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 298: Troubleshooting Principal Parts

    [ IX Troubleshooting ] [4] Troubleshooting Principal Parts High-Pressure Sensor -1- High-Pressure Sensor (63HS1, PS1, PS3) 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 (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the high-pressure sensor appears on the LED1 on the control board.
  • Page 299 [ 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 (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the low-pressure sensor appears on the LED1 on the control board.
  • Page 300 [ 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 (SW4) 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 301 [ IX Troubleshooting ] Refrigerant Circuit diagram (P72 model) Solenoid valve block SV4d SV4a SV4b CV7a LEV5a CV3a CV2a CV5a SV5b CV8a CV9a CV6a CV4a Solenoid valve block (three compartments) SV4d SV4b SV4a SV4d SV4b SV4a HWE1116D - 292 -...
  • Page 302 [ IX Troubleshooting ] Refrigerant Circuit diagram (P120, P144 models) SV4c CV7b Solenoid valve block SV4d CV7a SV4a SV4b LEV5a LEV5b CV8a CV5a SV5b CV4b CV5b CV2b CV2a CV3a CV6b CV6a CV4a Solenoid valve block(three compartments) SV4d SV4a SV4b SV4b SV4d SV4a 1 is located behind 3...
  • Page 303 [ IX Troubleshooting ] (4) 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 304 [ IX Troubleshooting ] Outdoor Unit Fan -4- Outdoor Unit Fan (1) Fan motor ŒTo check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor fan controls the revolutions of the fan.The revolution of the fan is approximately 680rpm(P72 model),790rpm(P96 model), 630rpm (P120 model), 750rpm (P144 model) at full speed.
  • Page 305 [ IX Troubleshooting ] -5- LEV LEV operation LEV are stepping-motor-driven valves that operate by receiving the pulse signals from the indoor and outdoor unit control boards. (1) Outdoor LEV (LEV5a,b), Indoor LEV and BC controller LEV The valve opening changes according to the number of pulses. 1) Control board and LEVs (Indoor unit LEV;...
  • Page 306 [ IX Troubleshooting ] 4) LEV valve closing and opening operation *When the power is turned on, the valve closing signal of 2200 pulses will be output from the indoor board to LEV to fix the valve position. It must be fixed at point A . When the valve operates smoothly, no sound from LEV or no vibration Valve closed occurs, however, when the pulses change from E to A in the chart or...
  • Page 307 [ IX Troubleshooting ] (3) Removal procedure of outdoor unit LEV5a,b coils 1) Components The outdoor unit LEV consists of a coil and a valve body that can be separated from each other. Body Stopper Coil Lead wire 2) Removing the coil Securely hold the LEV at the bottom (as indicated by A in the figure), and turn the coil.

  • Page 308: Pressure Sensor

    [ IX Troubleshooting ] Troubleshooting Principal Parts of BC Controller -6- Troubleshooting Principal Parts of BC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor START Note 1 Check whether the pressure sensor or the connectors of P1 and P3 are connected, properly Repair the fault.
  • Page 309 [ IX Troubleshooting ] 1) BC controller: Phenomena when the pressure sensor is connected wrongly (reverse connection of P1 and P3) to the board. Symptoms Cooling-only Cooling-main Heating only Heating main Indoor heating SC small Non-cooling Normal Non-cooling SC11 large SC11 large SC11 large Heating indoor Thermo ON...

  • Page 310: Temperature Sensor

    [ 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 311 [ IX Troubleshooting ] 1) For the connectors on the board, TH11 and TH12 are connected to CN10, and TH15 and TH16 are connected to CN11. Dis- connect the connector in trouble, and check the sensor of each number. ŒPull out the sensor connector from the I/O board, Do not pull the sensor by holding the lead wire. ŒMeasure the resistance with such as a tester.
  • Page 312 [ IX Troubleshooting ] 3. Troubleshooting flow chart for LEV Solenoid valve (1) LEV No cooling capacity No heating capacity Note 1 Check whether the electric expansion valve and the solenoid valve connector are not disconnected or not loose. Fault is found. Repair the fault.
  • Page 313 [ IX Troubleshooting ] 1) BC controller: Phenomena when LEV is connected wrongly (reverse connection of LEV1 and LEV3) to the board. Phenomena Cooling-only Cooling-main Heating only Heating main Non-cooling Non-cooling and non-heating Indoor heating SC small Non-cooling SH12 small, SC11 small SH12 small, SC11 small PHM large Indoor heating SC small...
  • Page 314 [ IX Troubleshooting ] Self-diagnosis LED Measurement data Symbol SW4 setting value 1 2 3 4 5 6 7 8 9 10 LEV1 opening 1 2 3 4 5 6 7 8 9 10 LEV2 opening 1 2 3 4 5 6 7 8 9 10 G, GA, HA LEV3 opening (Standard...
  • Page 315 [ 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 316 [ IX Troubleshooting ] (2) Solenoid valve (SVA, SVB, SVC) Faulty judgment of solenoid valve Stop the operation of the applied BC remote controller system. Stop the operation Check whether the wire to the solenoid valve is not connected wrongly, or the connector is not loose. No fault Repair the fault.
  • Page 317 [ IX Troubleshooting ] Check whether the BC board output signal corresponds with the solenoid valve operation correspond. 1) SVA, SVB, SVC SVA, SVB, and SVC turn on or off according to the indoor unit operation mode. Mode Cooling Heating Stopped Defrost Port...
  • Page 318 [ IX Troubleshooting ] 4. BC controller transformer BC controller control board CNTR CN03 White Normal Abnormal CNTR(1)-(3) about 58 ohm. Open-phase or shorting CN03(1)-(3) about 1.6 ohm. * Before measuring the resistance, pull out the connector. HWE1116D - 309 -...
  • Page 319 [ IX Troubleshooting ] [TKMU-A] Inverter (TKMU-A) -7- Inverter (TKMU-A) ŒReplace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.) ŒReplace only the fan motor if only the fan motor is found to be defective.
  • Page 320 [ IX Troubleshooting ] [TKMU-A] 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, 4256, 4220, 4225, 4226, 4230, 4240, 4260, 5301, Display on the Outdoor Unit Board. 5305, 5306, 0403 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-...
  • Page 321 [ IX Troubleshooting ] [TKMU-A] (2) Inverter output related troubles Items to be checked Phenomena Remedy <P72 model> IPM/overcurrent breaker trip Replace the INV board. Check the INV Error code: 4250 (1) Remove power sup- board error Detail code: No. 101, 104, 105, 106, ply.
  • Page 322 [ IX Troubleshooting ] [TKMU-A] Items to be checked Phenomena Remedy <P72 model> Inverter-related prob- Turn off SW1-1 and go to [1] Check lems are detected. whether the Remove power supply. Inverter voltage is not Replace the INV board. inverter is output.
  • Page 323 [ IX Troubleshooting ] [TKMU-A] Check list Phenomenon Resolution Remove fan motor winding. Fan motor insulation failure. Change fan motor. Fan motor Check insulation resistance If < 1 M , Defect. earth, coil error and coil resistance. Fan motor wire failure. Change fan motor.
  • Page 324 [ IX Troubleshooting ] [TKMU-A] Check list Phenomenon Resolution Turn off breaker. After operation, electrical over- Check for fan motor lock. Check for fan in- load error or position detection er- If locked, change for fan verter failure. ror and unit stops within 10 motor.
  • Page 325 [ IX Troubleshooting ] [TKMU-A] (3) Trouble treatment when the main power breaker is tripped. Items to be checked Phenomena Remedy Perform Meg check between the Zero to several ohm, or Meg failure a. Check each part in the main inverter terminals on the power terminal circuit.
  • Page 326 [ IX Troubleshooting ] [TKMU-A] (5) Simple checking procedure for individual components of main inverter circuit ŒTurn off the power of the unit and leave it turned off for 10 minutes. Check that the voltage of the electrolytic capacitor (inverter main circuit) is 20 VDC or below.
  • Page 327 [ IX Troubleshooting ] [TKMU-A] (6) Intelligent power module (P96, P120, P144 models) Measure resistances between each pair of terminals on the IPM with a tester, and use the results for troubleshooting. 1) Notes on measurement ŒCheck the polarity before measuring. (On the tester, black normally indicates plus.) ŒCheck that the resistance is not open ( ) or not shorted (to 0 ).
  • Page 328 [ IX Troubleshooting ] [TKMU-A] (7) Diode stack (P96, P120, P144 models) Measure resistances between each pair of terminals on the diode stack with a tester, and use the results for troubleshoot- ing.Refer to (6) " Intelligent power module (IPM) " for notes on measurement and tester selection. Judgment value (reference) Black ( + ) External view...
  • Page 329 [ IX Troubleshooting ] [TKMU-A] Judgment value (reference) Black ( + ) SC-P1 TB-N SC-R SC-S SC-T SC-P1 5 - 200 5 - 200 5 - 200 TB-N Red (-) SC-R 5 - 200 SC-S 5 - 200 SC-T 5 - 200 Black ( + ) SC-P2 TB-N...
  • Page 330 [ IX Troubleshooting ] [YKMU-A] Inverter (YKMU-A) -7- Inverter (YKMU-A) ŒReplace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.) ŒReplace only the fan motor if only the fan motor is found to be defective.
  • Page 331 [ IX Troubleshooting ] [YKMU-A] 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, 4256, 4220, 4225, 4226, 4230, 4240, 4260, 5301, Display on the Outdoor Unit Board. 5305, 5306, 0403 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-...
  • Page 332 [ IX Troubleshooting ] [YKMU-A] (2) Inverter output related troubles Items to be checked Phenomena Remedy Remove power sup- Overcurrent error Replace the INV board. Check the ply. Error code: 4250 INV board er- Detail code: No. 101, 104, 105, ror detection 106, and 107 circuit.
  • Page 333 [ IX Troubleshooting ] [YKMU-A] Items to be checked Phenomena Remedy Put the outdoor unit into oper- Overcurrent-related problems oc- a. Check items [1] through Check whether ation. cur immediately after compressor [3] for problems. the inverter is Check the inverter output volt- startup.
  • Page 334 [ IX Troubleshooting ] [YKMU-A] Check list Phenomenon Resolution Remove fan motor winding. Fan motor insulation failure. Change fan motor. Fan motor Check insulation resistance If < 1 M , Defect. earth, coil error and coil resistance. Fan motor wire failure. Change fan motor.
  • Page 335 [ IX Troubleshooting ] [YKMU-A] Check list Phenomenon Resolution Turn off breaker. After operation, electrical over- Check for fan motor lock. Check for fan in- load error or position detection er- If locked, change for fan verter failure. ror and unit stops within 10 motor.
  • Page 336 [ IX Troubleshooting ] [YKMU-A] (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 337 [ IX Troubleshooting ] [YKMU-A] (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.
  • Page 338 [ IX Troubleshooting ] [YKMU-A] Judgment value (reference) Black ( + ) SC-P1 FT-N SC-L1 SC-L2 SC-L3 SC-P1 5 - 200 5 - 200 5 - 200 FT-N Red (-) SC-L1 5 - 200 SC-L2 5 - 200 SC-L3 5 - 200 Black ( + ) SC-P2 FT-N...

  • Page 339: Indoor Unit

    [ IX Troubleshooting ] [TKMU-A] Control Circuit (TKMU-A) -8- Control Circuit (TKMU-A) (1) Control power source function block 1) PURY-P72TKMU-A Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter INV board Compressor Smoothing capacitor Inverter Noise filter...
  • Page 340 [ IX Troubleshooting ] [TKMU-A] 2) PURY-P96TKMU-A Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter Compressor Smoothing capacitor Inverter Noise filter Rectifier AC 208 / 230 V INV board Inverter drive Fuse Terminal block for 15V Power supply...
  • Page 341 [ IX Troubleshooting ] [TKMU-A] 3) PURY-P120, P144TKMU-A Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter Compressor Smoothing capacitor Inverter Noise filter Rectifier AC 208 / 230 V INV board Inverter drive Fuse Terminal block for 15V Power supply...
  • Page 342 [ IX Troubleshooting ] [TKMU-A] (2) Troubleshooting transmission power circuit of outdoor unit 1) PURY-P72TKMU-A 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.
  • Page 343 [ IX Troubleshooting ] [TKMU-A] 2) PURY-P96, P120, P144TKMU-A Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
  • Page 344 [ IX Troubleshooting ] [YKMU-A] Control Circuit (YKMU-A) - 8 - Control Circuit (YKMU-A) (1) Control power source function block 1) PURY-P72, P96YKMU-A Power source system (AC 230 / 460 V) Control system (DC 5 ~ 30 V) INV board Noise filter...
  • Page 345 [ IX Troubleshooting ] [YKMU-A] 2) PURY-P120, P144YKMU-A Power source system (AC 230 / 460 V) Control system (DC 5 ~ 30 V) INV board Noise filter Compressor Noise filter Rectifier Smoothing capacitor Inverter AC 460V Fuse Terminal block for Inverter drive 17V Power supply power source...
  • Page 346 [ IX Troubleshooting ] [YKMU-A] (2) Troubleshooting transmission power circuit of outdoor unit 1) PURY-P72, P96, P120, P144YKMU-A Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem.

  • Page 347: 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 high-pressure side refrigerant service valve (BV2) on the outdoor unit while the com- pressor is being stopped.
  • Page 348 [ IX Troubleshooting ] 3. Leak spot: In the case of extension pipe for indoor unit (Heating season) (1) Run all the indoor units in heating test run mode. 1) To run the indoor unit in test run mode, set SW4 (769) on the outdoor unit control board to ON. 2) Change the setting of the remote controller for all the indoor units to the heating mode.

  • Page 349: Compressor Replacement Instructions

    [ IX Troubleshooting ] [6] Compressor Replacement Instructions 1. 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.
  • Page 350 [ IX Troubleshooting ] Compressor cover Compressor cover (right) (top) 4. Remove the compressor cover (top). 5. Remove the compressor wires, compressor cover, and the right. Protection for the sealing material Suction piping Protection for the compressor cover 6. Place protective materials on the insulation lining of the compressor cover and on the sealing material on the compressor suction pipe to protect them from the torch flame, debraze the pipe, and replace the...
  • Page 351 SV4d), Check valve (CV4a, CV6a, CV8a, CV9a). Replace them properly according to the procedures. 1. Applicable models • PURY-P72, 96TKMU-A (-BS), PURY-P72, 96YKMU-A (-BS) 2. Parts to be serviced, Set-content Following instructions are applicable to 1-4 service parts on the table below.
  • Page 352 [ IX Troubleshooting ] 2) Remove the control box and the partition plate. 3) Remove the cable that is fixed 1) Remove the upper and to the Frame M ASSY and lower service panels remove the Frame M ASSY. (Panel FU and FB). Brazing or debrazing pipes Coil cover, Solenoid valve coil (SV4a,SV4b,SV4d)
  • Page 353 [ IX Troubleshooting ] (2) Check valve (CV4a, CV6a, CV8a, CV9a) replacement procedures Remove the Solenoid valve block ASSY following "(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement procedures" on the front page. Debraze G-J parts (total 4 places), and remove the Check valve ASSY. Replace the Check valve (CV4a, CV6a, CV8a, CV9a) to be serviced while it is removed from the unit.
  • Page 354 [ IX Troubleshooting ] Detailed View of Part A Brazing or debrazing pipes Check valve replacement H (ø15.88) G (ø28.6) CV6a CV4a 2 (ø15.88) 1 (ø28.6) When replacing CV4a: 5 (ø22.2) Remove the brazing 1. 3 (ø28.6) When replacing CV6a: Remove the brazing 2.
  • Page 355 [ IX Troubleshooting ] 3. R410A CITY MULTI R2 Solenoid valve block ASSY (SV4a, SV4b, SV4d), Check valve (CV4a, CV6a, CV8a) replacement instructions * Following instructions show procedures for replacing service parts for Solenoid valve block ASSY (SV4a, SV4b, SV4d), Check valve (CV4a, CV6a, CV8a). Replace them properly according to the procedures. 1.
  • Page 356 [ IX Troubleshooting ] 2) Remove the control box. 3) Remove the cable that is fixed to 1) Remove the upper the Frame M ASSY and lower service and remove the Frame M ASSY. panels (Panel FU and FB). Brazing or debrazing pipes E (ø15.88) 1 10 Coil cover, Solenoid valve coil...
  • Page 357 [ IX Troubleshooting ] (2) Check valve (CV4a, CV6a, CV8a) replacement procedures Remove the Solenoid valve block ASSY following "(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement procedures" on the front page. Debraze H-K parts (total 4 places), and remove the Check valve ASSY. Replace the Check valve (CV4a, CV6a, CV8a) to be serviced while it is removed from the unit.
  • Page 358 [ IX Troubleshooting ] Detailed View of Part A Brazing or debrazing pipes I (ø15.88) K (ø15.88) *This figure does not show heat exchanger. Check valve replacement CV6a CV4a (ø15.88) When replacing CV4a: Remove the brazing 1. (ø22.2) When replacing CV6a: Remove the brazing 2.

  • Page 359: Servicing The Bc Controller

    [ IX Troubleshooting ] [7] Servicing the BC controller 1. Service panel *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure 1) Remove the two lock nuts on the control box, loosen the other two, and remove the control box. 2) Remove the three fixing screws on the service panel, Ceiling panel Loosen...
  • Page 360 [ IX Troubleshooting ] 3. Thermistor (liquid pipe/gas pipe temperature detection) *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure (1) Remove the service panel. 1) For TH11, TH12, and TH15, refer to 1. 1) - 2). 2) For TH16, refer to 1.
  • Page 361 [ IX Troubleshooting ] 5. LEV Work procedure Explanatory figure (1) Remove the service panel.(Refer to 1. 1) - 3) (2) Replace the LEV in trouble. LEV3 Secure enough service space in the ceiling for welding operation, and conduct the work carefully.If required, LEV1 dismount the unit from the ceiling, and conduct the work.

  • Page 362: 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 SW4 switches and SW6-10 are set to OFF, check the items under the ap- plicable item numbers below. 1.
  • Page 363 [ IX Troubleshooting ] HWE1116D - 354 -...
  • Page 364 X LED Monitor Display on the Outdoor Unit Board [1] How to Read the LED on the Service Monitor ............... 357 HWE1116D - 355 -...
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  • Page 366 [ 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 4-1 through 4-10 (Set SW6-10 to OFF.)(Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.
  • Page 367 [ 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 AG-150A. 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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