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Midea Blanc ON-OFF Series, Service Manual, Page: 57 / 59

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Midea Blanc ON-OFF Series Service Manual Download Page 57

DM16-01.01.07en  

Blanc 

On-off 

Service manual 

 

57 

Main parts check 

1.Temperature sensor checking 

Disconnect the temperature sensor 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 temp.(T5) sensor. 

        Measure the resistance value of each winding by using the multi-meter. 

 

Summary of Contents for Blanc ON-OFF Series

Page 1: ...1 Blanc ON OFF Series Service Manual 2016 DM16 01 01 07en MSMA1A 07HRN1 MOAB02 07HN1 MSMA1A 09HRN1 MOAB02 09HN1 MSMA1B 12HRN1 MOBA01 12HN1 MSMA1C 18HRN1 MOBA03 18HN1 MSMA1D 24HRN1 MOCA02 24HN1...

Page 2: ...the elevation 26 7 4 Installation for the first time 27 7 5 Adding the refrigerant after running the system for many years 29 7 6 Re installation while the indoor unit need to be repaired 30 7 7 Re i...

Page 3: ...the correctly rated breaker of fuse There is risk of fire or electric shock Do not modify or extend the power cable There is risk of fire or electric shock Do not install remove or reinstall the unit...

Page 4: ...s risk of physical injury electric shock or product failure When the product is soaked contact an authorized service center There is risk of fire or electric shock Be caution that water could not ente...

Page 5: ...the product when removing the air filter They are very sharp Do not step on or put anything on the product outdoor units Always insert the filter securely Clean the filter every two weeks or more oft...

Page 6: ...l 2 Function Model Names of Indoor Outdoor Units On Off Capacity Indoor units Outdoor units 7k MSMA1A 07HRN1 MOAB02 07HN1 9k MSMA1A 09HRN1 MOAB02 09HN1 12k MSMA1B 12HRN1 MOBA01 12HN1 18k MSMA1C 18HRN1...

Page 7: ...e ROTARY ROTARY ROTARY Brand GMCC Rechi GMCC Capacity Btu h 6995 7029 8428 8530 13853 13853 Input W 702 735 830 860 955 995 Rated current RLA A 3 21 3 15 3 85 3 73 4 35 4 2 Locked rotor Amp LRA A 16 1...

Page 8: ...d type mm 7 innergroove tube 7 innergroove tube 7 innergroove tube f Coil length x height x width mm 685x508x13 37 685x508x13 37 744x504x22 g Number of circuits 2 2 2 Outdoor noise level dB A 54 55 57...

Page 9: ...A 54 5 Thermal protector Thermal protector position INTERNAL INTERNAL Capacitor uF 50 60 Refrigerant oil oil charge ml ESTER OIL VG74 350 ESTER OIL VG74 850 Indoor fan motor Model YKFG 25 4 6 YKFG 45...

Page 10: ...oor noise level dB A 58 59 Outdoor unit Dimension W D H mm 770x300x555 845x363x702 Packing W D H mm 900x345x585 965x395x755 Net Gross weight Kg 34 9 37 3 49 2 52 4 Refrigerant type g R410A 1150g R410A...

Page 11: ...1 07en Blanc On off Service manual 11 4 Dimension 4 1 Indoor Unit Model W D H MSMA1A 07HRN1 715 194 285 MSMA1A 09HRN1 715 194 285 MSMA1B 12HRN1 805 205 285 MSMA1C 18HRN1 957 233 302 MSMA1D 24HRN1 1040...

Page 12: ...Blanc On off DM16 01 01 07en 12 Service manual For MSMA1A 07HRN1 MSMA1A 09HRN1...

Page 13: ...DM16 01 01 07en Blanc On off Service manual 13 For MSMA1B 12HRN1 For MSMA1C 18HRN1...

Page 14: ...Blanc On off DM16 01 01 07en 14 Service manual For MSMA1D 24HRN1...

Page 15: ...DM16 01 01 07en Blanc On off Service manual 15 4 2 Outdoor Unit More than 30cm More than 60cm More than 200cm More than 30cm More than 60cm Service space Fence or obstacles...

Page 16: ...Blanc On off DM16 01 01 07en 16 Service manual For MOAB02 07HN1 MOAB02 09HN1...

Page 17: ...DM16 01 01 07en Blanc On off Service manual 17 For MOBA01 12HN1 MOBA03 18HN1 487 W1 70 W2 298 555 300 D H 12 60 93 H1 H2 D1 770 W 779 W3 322 D2 25 B1 90 B2 61 5 A2 12 A1 R 6 286 D3...

Page 18: ...Blanc On off DM16 01 01 07en 18 Service manual For MOCA02 24HN1...

Page 19: ...kW 0 66 0 66 0 65 0 64 0 66 0 68 32 C D 23 C W Total capacity kW 2 39 2 36 2 34 2 30 1 84 1 72 Sensitive capacity kW 1 91 1 89 1 87 1 84 1 47 1 38 Input kW 0 74 0 74 0 73 0 72 0 74 0 77 Heating HEATIN...

Page 20: ...84 0 84 0 82 0 84 0 88 32 C D 23 C W Total capacity kW 3 06 3 03 3 00 2 95 2 36 2 21 Sensitive capacity kW 2 45 2 43 2 40 2 36 1 89 1 77 Input kW 0 95 0 94 0 94 0 92 0 95 0 98 Heating HEATING OUTDOOR...

Page 21: ...12 1 17 32 C D 23 C W Total capacity kW 4 09 4 05 4 01 3 93 3 14 2 95 Sensitive capacity kW 3 27 3 24 3 21 3 14 2 52 2 36 Input kW 1 26 1 25 1 25 1 22 1 26 1 31 Heating HEATING OUTDOOR CONDITIONS Indo...

Page 22: ...64 1 63 1 60 1 65 1 71 32 C D 23 C W Total capacity kW 6 14 6 08 6 02 5 90 4 72 4 43 Sensitive capacity kW 4 91 4 86 4 82 4 72 3 78 3 54 Input kW 1 85 1 84 1 83 1 79 1 85 1 92 Heating HEATING OUTDOOR...

Page 23: ...57 2 55 2 50 2 58 2 68 32 C D 23 C W Total capacity kW 8 19 8 11 8 03 7 87 6 30 5 91 Sensitive capacity kW 6 55 6 49 6 42 6 30 5 04 4 72 Input kW 2 90 2 88 2 86 2 80 2 88 3 00 Heating HEATING OUTDOOR...

Page 24: ...cle 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 ACCUMULAT...

Page 25: ...0 479kgf cm 19 3 4 6500 663kgf cm 6700 683kgf cm 7 2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nomin...

Page 26: ...HRN1 QC2 MOAB02 07HN1 QC2 3 8 9 52 1 4 6 35 5 8 20 20 MSMAA 09HRN1 QC2 MOAB02 09HN1 QC2 3 8 9 52 1 4 6 35 5 8 20 20 MSMAB 12HRN1 QC2 MOBA01 12HN1 QC2 1 2 12 7 1 4 6 35 5 8 20 20 MSMAC 18HRN1 QC2 MOBA0...

Page 27: ...he closed position 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Connect the charge hose of handle hi connection to the vacuum pump 4 Fully open the h...

Page 28: ...rging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylind...

Page 29: ...cedure 1 Connect the charge hose to the 3 way service port open the 2 way valve and the 3 way valve Connect the charge hose to the valve at the bottom of the cylinder If the refrigerant is R410A make...

Page 30: ...t quickly 4 Set the 2 way valve to the close position 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immedi...

Page 31: ...e to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to...

Page 32: ...lves Low 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 approxim...

Page 33: ...DM16 01 01 07en Blanc On off Service manual 33 8 Wiring Diagram 8 1 Indoor Unit MSMA1A 07HRN1 MSMA1A 09HRN1 MSMA1B 12HRN1 MSMA1C 18HRN1...

Page 34: ...Blanc On off DM16 01 01 07en 34 Service manual MSMA1D 24HRN1...

Page 35: ...DM16 01 01 07en Blanc On off Service manual 35 8 2 Outdoor Unit MOAB02 07HN1 MOAB02 09HN1 MOBA01 12HN1 MOBA03 18HN1...

Page 36: ...Blanc On off DM16 01 01 07en 36 Service manual MOCA02 24HN1...

Page 37: ...above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be less than 80 If the air conditioner operates...

Page 38: ...isplays the temperature settings when the air conditioner is operational Displays the room temperature in Fan and Drying mode Displays the self diagnostic codes Dispalys for three seconds when Timer O...

Page 39: ...lys under 8 heating operation WIFI control display optional Displays when the WIFI control feature is activated Not available when the unit does not have this function NOTE A guide on using the infrar...

Page 40: ...ays failure information and can t returns to normal operation automatically 10 3 5 Current protection A B C Resume The current exceeds setting value for certain time the compressor and outdoor fan wil...

Page 41: ...ssor and outdoor fan will shut off T1 On Off 10 4 2 2 Outdoor fan running rules The On off outdoor units have single fan speed The outdoor fan will run following the compressor except when AC is in ev...

Page 42: ...evaporator coil temp T2 keeps lower than setting value the compressor and outdoor fan will shut off 10 4 2 5 High condenser temperature T3 protection only for MSMAD 24HRN1 QB8W T3 Compressor Off Comp...

Page 43: ...d the current protection 10 4 3 3 Indoor fan running rules When the compressor is on the indoor fan can be set to high med low auto And the anti cold wind function has the priority Auto fan action T1...

Page 44: ...mpressor keep running indoor and outdoor motor will stop defrost lamp of the indoor unit will be lighted Will be displayed Condition of ending defrosting If any one of the following items is satisfied...

Page 45: ...rough an auto restart module In case of a sudden power failure the module memorizes the setting conditions before the power failure The unit will resume the previous operation setting not including sw...

Page 46: ...om remote controller for 7 minutes or pressing FOLLOW ME button again the follow me function will be turned off automatically and the temperature will control the unit according to the room temperatur...

Page 47: ...DM16 01 01 07en Blanc On off Service manual 47 will display the maximum value or minimum value...

Page 48: ...rossing signal detection error 4 times X E3 Indoor fan speed has been out of control 5 times X E4 Indoor room temperature sensor T1 open circuit or short circuit 6 times X E5 Evaporator coil temperatu...

Page 49: ...nosis and solution E0 Error Code E0 Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip Supposed causes Installation mistake PCB faulty Trouble s...

Page 50: ...r outdoor unit s communication diagnosis and solution E1 Error Code E1 Malfunction decision conditions Indoor unit does not receive the feedback from outdoor unit during 120 seconds Supposed causes Wi...

Page 51: ...ection error diagnosis and solution E2 Error Code E2 Malfunction decision conditions When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is...

Page 52: ...rol diagnosis and solution E3 Error Code E3 Malfunction decision conditions When indoor fan speed keeps too low 300RPM for certain time the unit will stop and the LED will display the failure Supposed...

Page 53: ...r Power on and set the unit running in fan mode at high fan speed After running for 15 seconds measure the voltage of pin1 and pin2 If the value of the voltage is less than 100V 208 240V power supply...

Page 54: ...ircuit of temperature sensor diagnosis and solution E4 Error Code E4 E5 F2 Malfunction decision conditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the fai...

Page 55: ...55 11 2 6 Indoor PCB Display board communication error E7 Error Code E7 Malfunction decision conditions Indoor PCB does not receive feedback from Display board Supposed causes Wiring mistake PCB fault...

Page 56: ...orator coil temp T2 of the compressor just starts running as Tcool In the beginning 5 minutes after the compressor starts up if T2 Tcool 2 does not keep continuous 4 seconds and this situation happens...

Page 57: ...he temperature sensor 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...

Page 58: ...7 99 5 87359 77 171 1 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 17...

Page 59: ...75 167 8 084 115 239 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 3...

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