Midea Mono 3D Service Manual Download Page 13

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4. Refrigerant Cycle Diagram

LIQUID SIDE

GAS SIDE

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(CONDENSER)

Compressor

2-WAY VALVE

3-WAY VALVE

4-WAY VALVE

COOLING

HEATING

T2 Evaporator
temp. sensor

T1 Room temp.
sensor

T3 Condenser
temp. sensor

T5 Discharge
temp. sensor

T4 Ambient
temp. sensor

INDOOR

OUTDOOR

Electronic

expansion valve

CAPILIARY TUBE

Accumulator

CAPILIARY TUBE

Summary of Contents for Mono 3D

Page 1: ...ion MUST conform with local building codes or in the absence of local codes with the National Electrical Code NFPA70 ANSI C1 1993 or current edition and Canadian Electrical Code Part1 CSA C 22 1 The i...

Page 2: ...and the elevation 19 6 4 Installation for the first time 20 6 5 Adding the refrigerant after running the system for many years 21 6 6 Re installation while the indoor unit need to be repaired 21 6 7 R...

Page 3: ...ul of the case edges and the fins on the condenser and evaporator For installation always contact the dealer or an authorized service center Do not install the product on a defective installation stan...

Page 4: ...away properly A bad connection may cause water leakage Keep level even when installing the product It can avoid vibration of water leakage Do not install the product where the noise or hot air from th...

Page 5: ...of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire...

Page 6: ...tdoor units Series Capacity Indoor units Outdoor units Inverter 9k MS11M 09HRFN1 MW0W MOC 09HFN1 MW0W 12k MS11M 12HRFN1 MV0W MOC 12HFN1 MV0W 18k MS11M 18HRFN1 MU0W MOF 18HFN1 MU0W 24k MS11M 24HRDN1 MT...

Page 7: ...er O Golden Fin O Ionizer O Compressor Crankcase Heater Self Clean O 1W Standby Louver Position Memory Function Refrigerant Leakage Detect Self diag Function Hydrophilic Aluminum Fin Anti rust Cabinet...

Page 8: ...or unit operates as Fan only mode with low fan speed during this period the condensed water will take some dust on evaporator fins away After that the unit turns to heating operation with low fan spee...

Page 9: ...ed water accumulating on the base plate is avoided Compressor crankcase heater The oil dissolves easily in refrigerant especially in low temperature condition The crankcase heating belt can heat the b...

Page 10: ...09HRFN1 MW0W 140mm 5 5in 110mm 4 3in 45mm 1 8in 65mm 2 56in MS11M 12HRFN1 MV0W Model W D H MS11M 09HRFN1 MW0W 835mm 32 9in 198mm 7 8in 280mm 11 0in MS11M 12HRFN1 MV0W MS11M 18HRFN1 MU0W 990mm 39 0in 2...

Page 11: ...H Dimension of installation hole MS11M 18HRFN1 MU0W 260mm 10 2in 135mm 5 3in 45mm 1 8in 65mm 2 56in Model L R H Dimension of installation hole MS11M 24HRDN1 MT0W 275mm 10 8in 275mm 10 8in 45mm 1 8in...

Page 12: ...g is only for reference The appearance of your units may be different Model W D H W1 A B MOC 09HFN1 MW0W 760mm 29 9in 285mm 11 2in 590mm 23 2in 823mm 32 4in 530mm 20 9in 290mm 11 4in MOC 12HFN1 MV0W M...

Page 13: ...XCHANGE CONDENSER Compressor 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor T1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor...

Page 14: ...12 5 Wiring Diagram 5 1 Indoor Unit MS11M 09HRFN1 MW0W MS11M 12HRFN1 MV0W MS11M 18HRFN1 MU0W...

Page 15: ...13 MS11M 24HRDN1 MT0W...

Page 16: ...14 5 2 Outdoor Unit MOC 09HFN1 MW0W MOC 12HFN1 MV0W...

Page 17: ...15 MOF 18HFN1 MU0W...

Page 18: ...16 MOG 24HFN1 MT0W MOC 09HFN1 MW0W MOC 12HFN1 MV0W...

Page 19: ...17 MOF 18HFN1 MU0W...

Page 20: ...18 MOG 24HFN1 MT0W...

Page 21: ...nameplate which located on the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 6 3 Pipe length and the elevation Models Pipe size Gas Liquid MS11M 09HRF...

Page 22: ...the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound meter indicates 0 1Mpa 14 5Psi If the meter does not indicate 0 1Mpa 14 5Psi after pumping 30 minutes it sho...

Page 23: ...nd press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air condition...

Page 24: ...nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosen...

Page 25: ...ow side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately...

Page 26: ...1 If the air conditioner is used beyond the above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be...

Page 27: ...amp illuminates when Clean Air feature is activated DEFROST indication lamp For cooling heating models only Lights up when the air conditioner starts defrosting automatically or when the warm air cont...

Page 28: ...fan will be also controlled by anti cold wind function 8 3 7 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature 3 C 37 4 F and the machine connects to po...

Page 29: ...27 T2 7 C 44 6 F the compressor frequency will not be limited...

Page 30: ...ration frequency of compressor after starting submits to following rule 45 C 113 F 40 C 104 F 38 C 100 4 F 31 5 C 88 7 F 29 5 C 85 1 F 22 0 C 71 6 F 20 0 C 68 0 F Fmax F4 Fmax F7 Fmax F8 Fmax F6 Fmax...

Page 31: ...current frequency Resume No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher level frequency will increase twice at most 8 4 2 2 Ou...

Page 32: ...bient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 5 0 C 41 F 4 5 C 40 1 F T1 Ts T H G F E D C B A 3 5 C 38...

Page 33: ...e room temperature rising the indoor fan will run at super breeze When the compressor is running the indoor fan is controlled as below The anti cold wind function is as below For MS11M 09HRFN1 MW0W MS...

Page 34: ...nter defrosting mode no matter if T2 drops more than 5 C 41 F or not Condition of ending defrosting If any one of the following items is satisfied the defrosting will finish and the machine will turn...

Page 35: ...active and the same as that in cooling mode 8 4 5 5 The outdoor fan operates the same as in cooling mode 8 4 6 Forced operation function 8 4 6 1 Enter forced operation function When the machine is of...

Page 36: ...C is required to start up now the compressor will have 1 minute delay when power on Other conditions the compressor will have 3 minutes delay when restarts 8 4 10 Follow me 1 If the indoor PCB receive...

Page 37: ...will restore to the default angle 8 4 14 8 C Heating optional In heating operation the preset temperature of the air conditioner can be as lower as 8 C which keeps the room temperature steady at 8 C a...

Page 38: ...electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION For other models please connect discharge resistance approx 100 40W or soldering iron plug between terminals of the electrol...

Page 39: ...rant leakage detection 2 times O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit 3 times O F2 Condenser coil temperature sensor T3 open circuit or short circuit 4 times O F3 Com...

Page 40: ...ms No Problems LED301 Green LED300 Red IU display 1 standby for normal O X 2 Operation normally X O 3 IPM malfunction or IGBT over strong current protection X P0 4 Over voltage or too low voltage prot...

Page 41: ...13 33 49 17 1 IC12 IC11 IC10 IC9 IC8 IC7 24LC256 IC6 IC5 IC201 IC3 IC203 IC202 FUSE2 T20AL 250VAC FUSE1 E25 E24 E23 E22 E21 E20 E19 E18 E17 E16 E15 E14 E11 E206 E5 E4 DZ2 DZ1 D17 D16 D15 D14 D206 D11...

Page 42: ...72 R71 R70 R69 R68 R67 R66 R65 R64 R63 R62 R61 R60 R59 R58 R54 R53 R52 R51 R50 R49 R48 R47 R45 R44 R42 R41 R40 R39 R38 R37 R36 R35 R34 R33 R32 R31 R30 R29 R28 R27 R26 R25 R24 R23 R22 R21 R20 R19 R18 R...

Page 43: ...main PCB directly Otherwise check whether the EEPROM chip plugged in main PCB well Yes No Yes Correct the connection Replace the main PCB Shut off the power supply and turn it on 5 seconds later Is it...

Page 44: ...ith S port Yes Power off then turn on the unit 5 seconds later reconnect the power wire Is the error still displaying after several minutes No Replace the outdoor main PCB Power on Is the error exting...

Page 45: ...l move alternately between 50V to 50V If the outdoor unit has malfunction the voltage will move alternately with positive value While if the indoor unit has malfunction the voltage will be a certain v...

Page 46: ...o crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Supposed causes Connection mistake PCB faulty Trouble shooting Check if the connections and power supply...

Page 47: ...ll displaying the error code Shut off the power supply rotate the fan by hand Does it rotate properly The unit operates normally Find out the cause and have it solved For example check whether the fan...

Page 48: ...r or Outdoor DC Fan Motor control chip is in fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in...

Page 49: ...each other the fan motor must has problems and need to be replaced Otherwise go to step 2 2 Power on and when the unit is in standby measure the voltage of pin4 5 in feedback signal connector If the v...

Page 50: ...ED will display the failure Supposed causes Wiring mistake Sensor faulty PCB faulty Trouble shooting Check the connections between temperature sensor and main PCB Are the connections good Correct the...

Page 51: ...aulty Indoor PCB faulty System problems such as leakage or blocking Trouble shooting Is there cool air blowing out from indoor air outlet Yes Yes Check if T2 sensor is well fixed Correct the installat...

Page 52: ...connected by error and if the wires and connectors are broken Correct the connection or replace the wires and connectors Yes No IPM continuity check Check if the IPM terminal resistance values are un...

Page 53: ...51 Take the 9k model as example P U P V...

Page 54: ...52 P W N U...

Page 55: ...53 N V N W...

Page 56: ...nit with power supply and try to restart the unit when power supply gets normal No Yes No Correct the connections or replace the wires Yes Power on and when the unit is in standby check if the voltage...

Page 57: ...tlet or the heat exchanger of indoor and outdoor units Yes No Yes Yes Turn off the power supply and turn it on 10 minutes later Check if the unit can start normally No Check if the refrigerant charge...

Page 58: ...main PCB and compressor connected by error and if the wires and connectors are broken Correct the connection or replace the wires and connectors Yes No IPM continuity check Check if the IPM terminal r...

Page 59: ...from PCB measure the resistance value with a tester Temperature sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge t...

Page 60: ...29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1...

Page 61: ...2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246...

Page 62: ...25 257 4 39 2 33 91 4 64 147 2 95 203 126 258 8 4 5 40 1 34 93 2 65 149 96 204 8 127 260 6 5 41 35 95 66 150 8 97 206 6 128 262 4 6 42 8 36 96 8 67 152 6 98 208 4 129 264 2 7 44 6 37 98 6 68 154 4 99...

Page 63: ...checking Measure the resistance value of each winding by using the tester Position Resistance Value DA110S1C 30FZ DA130M1C 31FZ DA250S2C 30MT Blue Red 0 8 20 C 68 F 1 77 20 C 68 F 0 55 20 C 68 F Blue...

Page 64: ...N Digital tester Normal resistance value Digital tester Normal resistance value Red Black Several M Red Black Several M P N U N U V V W W Red 4 Indoor AC Fan Motor Measure the resistance value of eac...

Page 65: ...ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 PSI 70 59 119 113 117 125 147 PSI 75 63 124 120 126 132 155 PSI 80 67 135 129 132 140 162 F C ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 M...

Page 66: ...1 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 PSI 55 439 413 367 330 302 PSI 65 471 435 386 368 339 PSI 75 489 457 403 381 362 F C ODT IDT 57 53 13 89 11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 7...

Page 67: ...x assembly 1 203332390972 16 1 Louver motor 1 202400200031 3 1 Display board assembly 1 201332391249 17 Pipe clamp board 1 201119900949 4 Cover of indoor electronic control box 1 201119900948 18 Insta...

Page 68: ...ssembly 1 201532590453 19 6 Wire joint 1 202301450119 10 Fan motor cover 1 201132490127 20 Cover of electronic control box 1 201132490126 11 Asynchronous motor 1 202400370022 21 Remote Controller 1 20...

Page 69: ...1 201119900949 4 Cover of indoor electronic control box 1 201119900948 18 Installation plate 1 201232590037 5 Panel frame assembly 1 201132590958 19 Electronic control box assembly 1 203332591105 5 1...

Page 70: ...over of electronic control box 1 201132490126 11 Asynchronous motor 1 202400370022 21 Remote Controller 1 203355091532 12 Bearing holder 1 201119900952 22 Seal 1 202720090001 13 Bearing base 1 2027199...

Page 71: ...splay board assembly 1 201332391249 18 Chassis assembly 1 201132890703 4 Cover of indoor electronic control box 1 201133091048 19 Pipe clamp board 1 201232800103 5 Panel frame assembly 1 201132890673...

Page 72: ...0003 22 Cover of electronic control box 1 201133090981 10 Fix clamp of temperature sensor 1 201102000305 23 Remote Controller 1 203355091532 11 Evaporator assembly 1 201532890153 24 Seal 1 20272009000...

Page 73: ...plate 1 201232990002 4 Cover of indoor electronic control box 1 201119900948 21 Electronic control box assembly 1 203333090465 5 Panel frame assembly 1 201133090996 21 1 Wire joint 1 202301450119 5 1...

Page 74: ...532 11 Evaporator assembly 1 201533090129 24 Seal 1 202720090001 12 Fan motor cover 1 201133090991 25 Drain joint 1 201101020011 14 Asynchronous motor 1 202400401301 26 Air freshening filter 1 2011314...

Page 75: ...202440500004 20 Terminal board assembly 1 203337590049 5 Valve plate 1 201237200282 20 1 Wire joint 1 202301400256 6 Chassis assembly 1 201237590091 20 2 Terminal board 1 201237590046 7 Rear right cla...

Page 76: ...1510 14 Asynchronous motor 1 202400300060 24 Crankcase electric heater 1 202403100501 15 Supporter assembly of fan motor 1 201237390026 25 Discharge temperature sensor assembly 1 202301310068 16 Parti...

Page 77: ...trol box assembly 1 203337590101 4 Pipe temperature sensor assembly 1 202440500004 20 Terminal board assembly 1 203337590049 5 Valve plate 1 201237200282 20 1 Wire joint 1 202301400256 6 Chassis assem...

Page 78: ...embly 1 201601300554 13 Axial flow fan 1 201100390002 23 Compressor 1 201400601510 14 Asynchronous motor 1 202400300060 24 Crankcase electric heater 1 202403100501 15 Supporter assembly of fan motor 1...

Page 79: ...mperature sensor assembly 1 202440500004 21 2 Terminal board 1 201237890064 5 Valve plate 1 201237300285 22 Liquid valve assembly 1 201637891245 6 Chassis assembly 1 201257090054 22 1 Liquid valve 1 2...

Page 80: ...00033 27 Cover of inductance 1 201248090001 15 Supporter assembly of fan motor 1 201257090031 28 Reactor 1 202301000820 16 Rear supporter 1 201248100384 28 Reactor 1 202301000819 17 Top cover assembly...

Page 81: ...3 Condenser assembly 1 201538090077 20 4 Installation board for E parts 1 201157190010 4 Pipe temperature sensor assembly 1 202301300111 20 5 Radiator 1 202301901173 5 Valve plate 1 201248300316 20 6...

Page 82: ...ys valve 1 201600600119 15 Supporter assembly of fan motor 1 201257190071 24 Compressor 1 201400601740 16 Rear supporter 1 201248200095 25 Crankcase electric heater 1 202403101715 17 Top cover assembl...

Page 83: ...panel 1 Pull the below side of the panel and release the clips Then remove the front panel 2 Remove the filter and horizontal louver 3 Remove the four fixing screws 4 Remove the cover one screw 5 Lift...

Page 84: ...d the left side and open the cover 3 Remove the fixing screw and open the electrical box cover 4 Pull out the connectors of the swing motor and fan motor 5 Remove the fixing screw and then remove the...

Page 85: ...ng procedure 1 and procedure 2 remove the pipe holder at the rear side of the unit 2 Remove the two screws on the evaporator at the base bearing side 3 Remove two screws on the evaporator at the fixed...

Page 86: ...the fan and motor 1 After remove the evaporator ass y following procedure 1 procedure 2 and procedure 3 remove the three screws fixing the cover 2 Remove the screw fixing the motor and then pull out...

Page 87: ...oner and turn OFF the power breaker 2 Refer to the right side photos find out the fixing screws of the panels 3 Remove the screws of top panel and remove the top panel Screws of water connector on rig...

Page 88: ...fixing screws of motor holder and then remove the front panel 5 Remove the screws of the right side plate and remove the right side plate Screw of the top panel Screw of top panel Screws of right rear...

Page 89: ...the panel plate following procedure 1 remove the hex nut fixing the fan and then remove the fan 2 Unfix the hooks and then open the electronic control box cover Fan ass y Electronic control box React...

Page 90: ...en remove the fan motor Fan motor connector 3 Electrical parts How to remove the electrical parts 1 After finish work of item 1 and item 2 remove the three connectors for the compressor and electrical...

Page 91: ...the compressor top temp sensor condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 5 Remove the ground wires 6 Remove the power supply wires L1 L2 S 7 Then remove...

Page 92: ...s y can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 1 After perform work of item1 2 3 2 Remove the discharge pipe and...

Page 93: ...photos find out the fixing screws of the panels 3 Remove the screws of top panel and remove the top panel 4 Remove the screws of the front panel including the fixing screws of motor holder and then re...

Page 94: ...92 5 Remove the screws of the right side plate and remove the right side plate Screw of the top panel Screw of top panel Screws of right rear plate Screws of front panel Screws of the motor holder...

Page 95: ...move the fan 2 Remove the one fixing screw Unfix the hooks and then open the electronic control box cover 3 Release the fan motor connector and four way valve connector 4 Remove the four fixing screws...

Page 96: ...electrical parts 1 After finish work of item 1 and item 2 remove the two connectors for the compressor and the compressor crankcase heater 2 Release the three temp sensor connectors Four screws Fan m...

Page 97: ...95 3 Remove the connector of reactor 4 Remove the connector of electronic expansion valve 5 Remove the grounding screw 6 Remove the power supply wires L1 L2 S 7 Then remove the electronic control box...

Page 98: ...s y can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 1 After perform work of item1 2 3 2 Remove the discharge pipe and...

Page 99: ...s find out the fixing screws of the panels 3 Remove the screws of top panel and remove the top panel 4 Remove the screws of the front panel including the fixing screws of motor holder and then remove...

Page 100: ...98 5 Remove the screws of the right side plate and remove the right side plate Screw of the top panel Screw of top panel Screws of right rear plate Screws of front panel Screws of the motor holder...

Page 101: ...move the fan ass y 1 After remove the panel plate following procedure 1 remove the hex nut fixing the fan and then remove the fan Compressor and liquid gas separator Electronic control box Nut fixing...

Page 102: ...connector of the fan motor 3 Remove the four screws and the remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After finish work of item 1 and item 2 remove the connector of...

Page 103: ...101 2 Remove the six screws fixing the IPM board 3 Release the three connectors of the temp sensor 4 Pull out the two blue wires connected with the four way valve Two blue wires of four way valve...

Page 104: ...three orange wires one grey wire 6 Pull out connectors of the compressor top temp sensor condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 7 Remove the groundin...

Page 105: ...1 2 3 2 Recover refrigerant from the refrigerant circuit 3 Remove the screw of the coil and then remove the coil 4 Detach the welded parts of four way valve and pipe 5 Then the four way valve ass y ca...

Page 106: ...erform work of item1 2 3 2 Remove the discharge pipe and suction pipe with a burner 3 Remove the hex nuts and washers fixing the compressor on bottom plate 4 Lift the compressor from the base pan asse...

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Midea Mono 3D, Service Manual

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