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M thermal Split

202004

Midea

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Table 4-2.2:

KHA-06(08,10)RY1

outdoor unit main PCB for refrigerant system

Label in Figure

4-2.2

Code

Content

CN28

Ourput port L to main PCB for refrigerant system

CN22

Reserved

CN27

Output port N to main PCB for refrigerant system

CN3

Reserved

PE2

Port for ground wire

DSP1

Digital display

CN17

Port for communication with main PCB for refrigerant system

PE1

Port for ground wire

CN26

Reserved

CN10

Input port for neutral wire

CN11

Input port for live wire

CN9

Port for outdoor ambient temp. sensor and condenser temp. sensor

CN24

Input port for +12V/9V

CN1

Port for suction temp. sensor

CN8

Port for discharge temp. sensor

CN13

Port for high pressure switch

CN14

Port for low pressure switch

CN29

Port for communication with hydro-box control board

CN4

Port for pressure sensor

CN30

Port for communication(reserved)

CN2

Port for communication(reserved)

CN33

Port for electrical expansion value

CN16

Port for chassis electrical heating tape(Optional)

CN6

Port for 4-way value

CN5

Port for SV6 value

CN7

Port for compressor electric heating tape 1

CN18

Port for compressor electric heating tape 2

Midea CAC Confidential

M thermal Split

202004

Midea CAC Confidential

Split

Содержание KMK-60RY1

Страница 1: ...SERVICEMANUAL SPLIT TYPE HEAT PUMP R32...

Страница 2: ...Split...

Страница 3: ...rmal Split 202004 1 CONTENTS CONTENTS Part 1 General Information 3 Part 2 Component Layout and Refrigerant Circuits 7 Part 3 Control 17 Part 4 Diagnosis and Troubleshooting 31 Midea CAC Confidential S...

Страница 4: ...M thermal Split 2 202004 Midea M thermal Split Service Manual Midea CAC Confidential Split...

Страница 5: ...M thermal Split 202004 3 Part 1 General Information Part 1 General Information 1 Unit Capacities 4 2 External Appearance 5 Midea CAC Confidential Split...

Страница 6: ...tes The full model names can be obtained by substituting the asterisk in the model name format given in the left hand column of the table above with the shortened model names given in the table For ex...

Страница 7: ...2 External Appearance 2 1 Outdoor Unit Appearance Table 1 2 1 Outdoor unit appearance KHA 06RY1 KHA 08 10 RY1 KHA 12 14 16 RY3 2 2 Hydronic Box Appearance Table 1 2 2 Hydronic box appearance KMK 60RY1...

Страница 8: ...M thermal Split 6 202004 Midea M thermal Split Service Manual Midea CAC Confidential Split...

Страница 9: ...2 Component Layout and Refrigerant Circuits Part 2 Component Layout and Refrigerant Circuits 1 Layout of Functional Components 8 2 Piping Diagrams 13 3 Refrigerant Flow Diagrams 15 202004 7 Midea CAC...

Страница 10: ...lit Midea M thermal Split Service Manual 1 Layout of Functional Components Layout 1 1 Outdoor Unit KHA 06RY1 Figure 2 1 1 KHA 06RY1 top view Figure 2 1 2 KHA 06RY1 front view 8 202004 Midea CAC Confid...

Страница 11: ...M thermal Split Part 2 Component Layout and Refrigerant Circuits KHA 08 10 RY1 Figure 2 1 3 KHA 08 10 RY1 top view Figure 2 1 4 KHA 08 10 RY1 front view 202004 9 Midea CAC Confidential Split...

Страница 12: ...Midea M thermal Split Service Manual 10 202004 Midea CAC Confidential KHA 12 14 16 RY3 Figure 2 1 7 KHA 12 14 16 RY3 top view M thermal Split Split...

Страница 13: ...Part 2 Component Layout and Refrigerant Circuits Figure 2 1 8 KHA 12 14 16 RY3 front view 202004 11 Midea CAC Confidential M thermal Split Split...

Страница 14: ...anual 1 2 Hydronic Box Layout Figure 2 1 9 KMK 60 100 160 RY1 3 oblique view Electric control box Expansion vessel Manometer Safety valve Air purge valve Water flow switch Water side heat exchanger Wa...

Страница 15: ...trols refrigerant flow and reduces refrigerant pressure 2 Four way valve Controls refrigerant flow direction Closed in cooling mode and open in heating mode When closed the air side heat exchanger fun...

Страница 16: ...s air from the water circuit 2 Safety valve Prevents excessive water pressure by opening at 43 5 psi 3 bar and discharging water from the water circuit 3 Expansion vessel Balances water system pressur...

Страница 17: ...heat exchanger Distributor Water side heat exchanger 4 way valve High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure Electronic expansion valve capiii...

Страница 18: ...M thermal Split Midea M thermal Split Service Manual 16 202004 Midea CAC Confidential Split...

Страница 19: ...ol Part 3 Control 1 Stop Operation 18 2 Standby Control 18 3 Startup Control 19 4 Normal Operation Control 22 5 Protection Control 23 6 Special Control 26 7 Role of Temperature Sensors in Control Func...

Страница 20: ...o prevent refrigerant from mixing with compressor oil when the compressors are stopped The crankcase heater is controlled according to outdoor ambient temperature and the compressor on off state When...

Страница 21: ...tartup follows one of two startup programs until the target rotation speed is reached Refer to Figure 3 3 1 Figure 3 3 2 Figure 3 3 1 KHA 06RY1 compressor startup program 1 when ambient temperature is...

Страница 22: ...240s 36rps 90s Notes 1 Once the first 40 second stage of the program is complete the program proceeds to the subsequent stages in a step by step fashion and exits when the target rotation speed has be...

Страница 23: ...motor FAN Fan run at maximum speed 2 Electronic expansion valve EXV Position steps from 0 fully closed to 480 fully open controlled according to outdoor ambient temperature discharge temperature suct...

Страница 24: ...ns the appropriate compressor startup program Refer to Part 3 3 2 Compressor Startup Program Once the startup program is complete the compressor runs at the target rotation speed 4 3 Compressor Step C...

Страница 25: ...ects the compressor from transient spikes in pressure Figure 3 5 1 High pressure protection control Notes 1 Pc Discharge pressure When the discharge pressure rises above 4 3MPa the system displays P1...

Страница 26: ...s EA protection and the unit stops running When the discharge temperature is higher than suction temperature the compressor enters re start control 5 4 Compressor Current Protection Control This contr...

Страница 27: ...re for more than 3 minutes Outdoor ambient temperature is below 4 C and actual fan speed differs from target fan speed by 300rpm or more for more than 3 minutes Actual fan speed is less than 150rpm fo...

Страница 28: ...6kW Control functions and states Inverter compressor COMP Runs at oil return operation rotation speed DC fan motor FAN Controlled according to heating mode Electronic expansion valve EXV 304 steps Fou...

Страница 29: ...ontrol temperature of each zone separately thus different type radiator will operate at its optimal temperature and water pump cycle time will be reduced to save energy Cooling mode In two zones contr...

Страница 30: ...ot water needs at the same time Balance tank can store energy to provide hot water whilst heat pump runs heat mode cooling which can reduce the host selection and the initial investment 6 8 USB data t...

Страница 31: ...7 1 Location of the temperature sensors on Split systems Notes 1 The names and functions of the temperature sensors labelled 1 to 11 in this figure are detailed in Table 3 7 1 Figure 3 7 1 Locati on o...

Страница 32: ...tlet temperature sensor T3 5 Water side heat exchanger refrigerant outlet gas pipe temperature sensor T2B 6 Water side heat exchanger refrigerant outlet liquid pipe temperature sensor T2 7 Water side...

Страница 33: ...thermal Split 202004 31 Part 4 Diagnosis and Troubleshooting 1 Electric Control Box Layout 32 2 PCBs 35 3 Error Code Table 49 4 Troubleshooting 51 5 Appendix to Part 4 107 Midea CAC Confidential Spli...

Страница 34: ...e Manual 1 Electric Control Box Layout 1 1 Outdoor Unit Electric Control Box Layout Figure 4 1 1 KHA 06RY1 electric control box Main PCB Inverter module Figure 4 1 2 KHA 08 10 RY1 electric control box...

Страница 35: ...M thermal Split 202004 33 Figure 4 1 4 KHA 12 14 16 RY3 electric control box Main PCB Inverter module Main Power Electric Reactor Filter board DCFAN Electric Reactor Midea CAC Confidential Split...

Страница 36: ...M thermal Split 34 202004 Midea M thermal Split Service Manual 1 2 Hydronic Box Electric Control Box Layout Figure 4 1 5 KMK 60 100 160 RY1 3 Main control board Midea CAC Confidential Split...

Страница 37: ...shown in Figures 4 1 1 to Figure 4 1 4 in Part 4 1 1 Outdoor Unit Electric Control Box Layout The locations of each PCB in the hydronic box electric control box are shown in Figures 4 1 5 in Part 4 1...

Страница 38: ...stat cooling mode CL Power port for room thermostat COM 18 CN35 Port for smart grid grid signal photovoltaic signal 19 CN36 Port for remote switch temperature board 20 CN19 Communicate port between in...

Страница 39: ...3 Main PCBs for Refrigerant System Inverter Module Figure 4 2 2 KHA 06 08 10 RY1 outdoor unit main PCB for refrigerant system 4 5 6 7 8 9 10 3 2 1 11 12 13 14 15 16 17 18 19 27 26 25 24 23 22 21 20 M...

Страница 40: ...ort for live wire 12 CN9 Port for outdoor ambient temp sensor and condenser temp sensor 13 CN24 Input port for 12V 9V 14 CN1 Port for suction temp sensor 15 CN8 Port for discharge temp sensor 16 CN13...

Страница 41: ...M thermal Split 202004 39 Midea CAC Confidential Split...

Страница 42: ...M thermal Split 40 202004 Midea M thermal Split Service Manual Midea CAC Confidential Split...

Страница 43: ...rmal Split 202004 41 Figure 4 2 4 KHA 12 14 16 RY3 outdoor unit main PCB for refrigerant system 1 2 3 4 5 6 7 8 30 29 9 10 11 12 13 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 Midea CAC Confidential...

Страница 44: ...with main PCB for invert module board 13 CN6 Port for pressure sensor 14 CN36 Port for communication with main PCB for refrigerant system 15 CN5 Port for temp sensor Th 16 CN8 Port for temp sensor Tp...

Страница 45: ...M thermal Split 202004 43 Figure 4 2 5 KHA 06 08 10 RY1 outdoor unit inverter module For 4 6kW model 1 2 3 8 7 4 5 6 9 For 8 10kW model 1 2 3 8 7 4 5 6 9 Midea CAC Confidential Split...

Страница 46: ...Content 1 U Compressor connection port U 2 V Compressor connection port V 3 W Compressor connection port W 4 CN20 Output port for 12V 9V 5 CN19 Port for fan 6 CN32 Port for communication with main PC...

Страница 47: ...M thermal Split 202004 45 Midea CAC Confidential 2 3 4 5 6 7 8 1 14 9 13 12 11 10 Figure 4 2 7 KHA 12 14 16 RY3 outdoor unit inverter module Split...

Страница 48: ...18 Compressor connection port V 4 CN17 Compressor connection port U 5 CN15 Power Input port L3 6 CN7 Power Input port L2 7 CN5 Input port P_out for IPM module 8 CN16 Power Input port L1 9 CN1 Input po...

Страница 49: ...L3 3 CN203 Power supply N 4 CN212 Power supply port of 310VDC 5 CN211 Reserved 6 CN213 Port for FAN Reactor 7 CN214 Power supply port for Inverter module 8 PE3 Ground wire 9 CN8 Port for communication...

Страница 50: ...e Error or protection code 2 5 DIP switch setting and Modbus function Modbus function will be available in 2020 5 30 The rotating coded switch S3 0 F on the main control board of hydraulic module is u...

Страница 51: ...rature sensor error Sensor Tw_in EE 15 Hydronic box EEPROM error F1 116 DC generatrix voltage is too low H0 39 Communication error between outdoor unit main control chip and hydronic box main control...

Страница 52: ...rs from target frequency by more than 15Hz protection Pb 31 Water side heat exchanger anti freeze protection Pd 33 High temperature protection of refrigerant outlet temperature of condenser in cooling...

Страница 53: ...with all applicable legislation all national local and other laws standards codes rules regulations and other legislation that apply in a given situation Power off the outdoor units before connecting...

Страница 54: ...tes E8 has displayed 3 times When an E0 error occurs a manual system restart is required before the system can resume operation Split stops running Error code is displayed on hydronic box main PCB and...

Страница 55: ...ase its speed No Water flow switch is damaged Yes Replace the water flow switch No Internal circulator pump can t work Yes Turn off the power check the wire in the pump Once that is done the pump stil...

Страница 56: ...ion 4 3 2 Phase sequence error Only applies to 3 phase models Split stops running Error code is displayed on outdoor unit main PCB and user interface Possible causes 4 3 3 Power supply phases not conn...

Страница 57: ...quence is inverted the compressor will operate inversely If the wiring connection of each outdoor unit is in A B C phase sequence and multiple units are connected the current difference between C phas...

Страница 58: ...layed on hydronic box main PCB and user interface Possible causes 4 4 3 Communication wires between hydronic box and user interface not connected properly Communication wiring X Y E terminals misconne...

Страница 59: ...the communication wires and high voltage wires are separated No Communication wires are close to a source of electromagnetic radiation such as transformer or strong fluorescent lamp Yes Remove the sou...

Страница 60: ...error Ed indicates a water side heat exchanger water inlet temperature sensor error HA indicates a water side heat exchanger water outlet temperature sensor error H5 indicates a room temperature senso...

Страница 61: ...cuit 2 water outlet temperature sensor connection is port CN15 on the hydronic box main PCB labeled 14 in Figure 4 2 1 in Part4 2 2 Main PCB for Hydronic System Room temperature sensor connection is p...

Страница 62: ...ure sensor error E6 indicates an outdoor ambient temperature sensor error E9 indicates a suction pipe temperature sensor error EA indicates a discharge temperature sensor error Split stops running Err...

Страница 63: ...10 RY1 outdoor unit refrigerant system main PCB labeled 15 in Figure 4 2 2 in Part 4 2 1 Main PCBs for Refrigerant System Inverter Module port CN4 on the KHA 12 14 16 RY3 outdoor unit refrigerant syst...

Страница 64: ...face Possible causes 4 7 3 Hydronic box main PCB EEPROM is not connected properly Hydronic box main PCB damaged Procedure 4 7 4 EE Hydronic box main PCB EEPROM1 is not connected properly Yes Ensure th...

Страница 65: ...user interface Possible causes 4 8 3 The DC generatrix voltage is too low Procedure 4 8 4 F1 Power supply is abnormal Yes Provide normal power No LED on the Inverter Modules is lighting Yes Voltage of...

Страница 66: ...dule EEPROM damaged Procedure 4 9 4 HF Outdoor unit invert module EEPROM1 is not connected properly Yes Ensure the EEPROM is connected properly No Replace outdoor unit invert module Notes 1 Outdoor un...

Страница 67: ...t and hydronic box Split stops running Error code is displayed on hydronic box main PCB outdoor unit main PCB and user interface Possible causes 4 10 3 Power supply abnormal Transformer malfunction In...

Страница 68: ...wires P Q E between main control board of outdoor unit and hydraulic module have short circuited disconnected or misconnected Yes Reconnect the communication wires No Replace outdoor unit main PCB and...

Страница 69: ...erter driven module damaged Procedure 4 11 4 H1 LED on the main control board of outdoor unit and inverter module are light Yes LED is not light the board is damaged or have short circuit No Communica...

Страница 70: ...When HH error occurs a manual system restart is required before the system can resume operation The cause of HH error should be addressed promptly in order to avoid system damage Split stops running...

Страница 71: ...in PCB three phase model Notes 1 Refer to Figures 4 1 1 to 4 1 4 in Part 4 1 1 Outdoor Unit Electric Control Box Layout and to the Split Engineering Data Book Part 4 Wiring Diagrams 2 Measure the volt...

Страница 72: ...it stops running Error code is displayed on outdoor unit main PCB and user interface Possible causes 4 13 3 Power supply voltage not within 90 110 of rated voltage Outdoor unit main PCB is damaged Pro...

Страница 73: ...h pressure sensor has short circuited or failed1 Yes Replace the sensor No Replace outdoor unit main PCB Notes 1 Measure the resistance among the three terminals of the pressure sensor If the resistan...

Страница 74: ...hen the pressure rises above 0 3MPa P0 is removed and normal operation resumes HP indicates Pe 0 6Mpa occurred 3 times in an hour Error code is displayed on outdoor unit main PCB and user interface Po...

Страница 75: ...for insufficient refrigerant An insufficiency of refrigerant causes compressor discharge temperature to be higher than normal discharge and suction pressures to be lower than normal and compressor cur...

Страница 76: ...otection and Split stops running When the discharge pressure falls below 3 6MPa P1 is removed and normal operation resumes Error code is displayed on outdoor unit main PCB and user interface Possible...

Страница 77: ...Part4 2 3 Main PCB for Refrigerant System Inverter Module port CN31 on the KHA 12 14 16 RY3 outdoor unit refrigerant system main PCB labeled 20 in Figure 4 2 4 in Part 4 2 3 Main PCB for Refrigerant...

Страница 78: ...16kW single phase model 30A 12 14 16kW three phase model 14A the system displays P3 protection and Split stops running When the current returns to the normal range P3 is removed and normal operation...

Страница 79: ...water flow switch for dirt blockages In cooling mode check air side heat exchanger fan and air outlets for dirt blockages 2 High pressure side blockage causes discharge temperature to be higher than...

Страница 80: ...ture rises above 115 C the system displays P4 protection and Split stops running When the discharge temperature falls below 95 C P4 is removed and normal operation resumes Error code is displayed on r...

Страница 81: ...onnection on outdoor unit main PCB is loose4 Yes Ensure the pressure switch is connected properly No Pressure sensor has short circuited or failed5 Yes Replace the pressure sensor No The high pressure...

Страница 82: ...ayout of Functional Components and to Table 5 5 1 or 5 5 2 in Part 5 5 1 Temperature Sensor Resistance Characteristics 4 High pressure switch connection is port CN13 on the KHA 06 08 10 RY1 outdoor un...

Страница 83: ...at exchanger water inlet and water outlet temperatures protection Split stops running Error code is displayed on hydronic box main PCB and user interface Possible causes 4 19 3 Temperature sensor not...

Страница 84: ...x main PCB Notes 1 Water side heat exchanger water inlet temperature sensor and water side heat exchanger water outlet temperature sensor connections are port CN6 on the hydronic box main PCB labeled1...

Страница 85: ...protection Excessive compressor frequency variation Actual compressor frequency differs from target frequency High pressure protection PED board self checking fail Specific error codes for inverter mo...

Страница 86: ...ore than 15Hz protection Table 4 4 3 Errors indicated on LED single phase 4 10kW LED1 flashing pattern GREEN LED2 is always on RED Corresponding error Flashes 3 times and stops for 1 second then repea...

Страница 87: ...maged1 Yes Replace the inverter module2 Notes 1 Measure the resistance between each of U V and W and each of P and N on the inverter module All the resistances should be infinite If any of them are no...

Страница 88: ...2 Measure the resistance between each of U V and W and each of P and N on the inverter module All the resistances should be infinite If any of them are not infinite the inverter module is damaged and...

Страница 89: ...place the inverter module3 Notes 1 Refer to Figure 4 4 2 2 Use clip on ammeter to measure the compressor current if the current is normal indicates the inverter module is failed if the current is abno...

Страница 90: ...1 L1 or L2 error appears immediately after the outdoor unit is powered on L1 L2 Power supply is abnormal Yes Re start the unit once the power supply has returned to normal No Replace the inverter mod...

Страница 91: ...gure 4 4 2 Figure 4 4 4 Relay location of main PCB for refrigerant system Single phase 4 6 8 10kW unit Single phase 12 14 16kW unit Relay L5 L8 L9 troubleshooting 4 20 8 L5 L8 L9 The wire is not conne...

Страница 92: ...ection Zero speed protection Excessive compressor frequency variation Actual compressor frequency differs from target frequency High pressure protection Contactor stuck or 908 self checking fail Speci...

Страница 93: ...17 times and stops for 1 second then repeats L8 Compressor frequency variation greater than 15Hz within one second protection L9 Actual compressor frequency differs from target frequency by more than...

Страница 94: ...the communication port between refrigerant system main control board for refrigerant system inverter module is port CN36 on refrigerant system main control board for refrigerant system port CN8 on inv...

Страница 95: ...rom the N terminal on the inverter module through the current sensor in the direction indicated by the arrow on the current sensor and end at the N terminal of capacitor Refer to Figure 4 4 7 Figure 4...

Страница 96: ...Connect the U V W wire from the inverter module to the correct compressor terminals as indicated by the labels on the compressor 2 Measure the voltage between each of W W V V U U and GND when the uni...

Страница 97: ...mpressor No Replace the inverter module2 Notes 1 When replacing an inverter module a layer of thermally conductive silica gel should be painted on the IPM module on the reverse side of the inverter mo...

Страница 98: ...ly after the outdoor unit is powered on L1 L2 P N 15V wire on refrigerant system main PCB is not connected properly1 Yes Ensure P N 15V wire is connected properly No Voltage between N and 15 is abnorm...

Страница 99: ...on the DC power output negative terminal terminal 5 and put the black probe onto each of the AC power input terminals terminals 1 2 and 3 in turn The voltage between terminal 5 and each of terminals...

Страница 100: ...rps L4 Compressor is over current2 Yes Replace the compressor No Replace the inverter PCB Notes 1 Re start the unit use clip on ammeter to measure the compressor current if the current is normal indic...

Страница 101: ...han 3 seconds the system displays Pd protection and Split stops running When the air side heat exchanger refrigerant outlet temperature returns drops below 55 C Pd is removed and normal operation resu...

Страница 102: ...mbient temperature sensor connection port are CN9 on the KHA 06 08 10 RY1 outdoor unit refrigerant system main PCB labeled 12 in Figure 4 2 2 in Part4 2 3 Main PCB for Refrigerant System Inverter Modu...

Страница 103: ...gher than outlet temperature in heating mode Split stops running Error code is displayed on hydronic box main PCB and user interface Hb indicates PP has displayed 3 times Possible causes 4 23 3 Temper...

Страница 104: ...rature sensor and water side heat exchanger water outlet temperature sensor connections are port CN6 on the hydronic box main PCB labeled 10 in Figure 4 2 1 in Part4 2 2 Main PCB for Hydronic System 2...

Страница 105: ...Error code is displayed on hydronic box main PCB and user interface Possible causes 4 24 3 Power supply voltage of the unit is low The space between the units is too narrow for heat exchanger Heat ex...

Страница 106: ...ump head is not enough Release the air and reselect the pump No Water outlet temp sensor1 is loosen or broken Yes Reconnect it or change a new one Notes 1 Water side heat exchanger water inlet tempera...

Страница 107: ...al display output 4 25 1 Description 4 25 2 PED PCB failure Split stops running Error code is displayed on hydronic box main PCB and user interface Possible causes 4 25 3 Power supply problem PED boar...

Страница 108: ...erve whether it can be recovered Yes Increase the power voltage to the required range No PED1 board broken Yes Replace PED PCB and power on again No IPM module broken Yes Replace IPM module and power...

Страница 109: ...water temperature sensor loose2 Yes Ensure the temperature sensor is connected properly No Water side heat exchanger water outlet temperature sensor water inlet temperature sensor or backup electric...

Страница 110: ...10 971 63 2 102 103 0 558 16 84 278 24 10 473 64 2 026 104 0 542 15 79 521 25 10 65 1 953 105 0 527 14 75 059 26 9 551 66 1 883 13 70 873 27 9 125 67 1 816 12 66 943 28 8 721 68 1 752 11 63 252 29 8...

Страница 111: ...31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 171 9 41 28 00 81 6 641 121 2 061 2 163 3 42 26 90 82 6 430 122 2 007 3 155 2 43 25 86 83 6 228 123 1...

Страница 112: ...2 9960 16 379 69 24 51 396 64 10 526 104 2 9096 15 358 83 25 49 165 65 10 161 105 2 8262 14 339 24 26 47 043 66 9 8105 13 320 85 27 45 025 67 9 4736 12 303 56 28 43 104 68 9 1498 11 287 33 29 41 276...

Страница 113: ...Split...

Страница 114: ...kaisai com...

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