Midea Aurora MSABAU-09HRDN1-QRC8GW Service Manual
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Midea Aurora MSABAU-09HRDN1-QRC8GW Service Manual

3d inverter series
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Aurora 3D Inverter Series
Service Manual 2014
ABSEU-A1-1410

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Summary of Contents for Midea Aurora MSABAU-09HRDN1-QRC8GW

  • Page 1 Aurora 3D Inverter Series Service Manual 2014 ABSEU-A1-1410...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Function ................................ 6 3. Dimension ..............................7 3.1 Indoor Unit ............................. 7 3.2 Outdoor Unit ..........................10 4. Refrigerant Cycle Diagram ........................11 5. Wiring Diagram ............................12 5.1 Indoor Unit ...........................

  • Page 3: Precaution

    Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1. Precaution condenser and evaporator.  For installation, always contact the 1.1 Safety Precaution dealer or an authorized service center.  Do not install the product on a ...
  • Page 4 There is risk of electric shock or fire. product.  Stop operation and close the window It can avoid vibration of water leakage.  in storm or hurricane. If possible, remove Do not install the product where the the product from the window before the noise or hot air from the outdoor unit could hurricane arrives.
  • Page 5  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries.

  • Page 6: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units MSABAU-09HRDN1-QRC8GW MOZ-09HFN1-QRD0GW 3D inverter MSABBU-12HRDN1-QRC8GW MOZ-12HFN1-QRD0GW MSABDU-18HRDN1-QRC8GW MOZ1-18HFN1-QRD0GW MSABEU-24HRDN1-QRC8GW MOF-24HFN1-QRD0GW 2 ways of drainage Filter Cold catalyst filter Louver Position Memory Function Ionizer(O) Refrigerant Leakage Detect Silver Ico Filter(O) Self-diag.

  • Page 7: Dimension

    3. Dimension 3.1 Indoor Unit Model MSABAU-09HRDN1-QRC8GW MSABBU-12HRDN1-QRC8GW MSABDU-18HRDN1-QRC8GW MSABEU-24HRDN1-QRC8GW 1080...
  • Page 8 For MSABAU-09HRDN1-QRC8GW: For MSABBU-12HRDN1-QRC8GW: For MSABDU-18HRDN1-QRC8GW: For MSABEU-24HRDN1-QRC8GW:...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space) More than 30cm More than 60cm More than 200cm Model MOZ-09HFN1-QRD0GW MOZ-12HFN1-QRD0GW MOZ1-18HFN1-QRDOGW MOF-22HFN1-QRD0GW...

  • Page 11: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) T1 Room temp. sensor T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 12: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit MSABAU-09HRDN1-QRC8GW，MSABBU-12HRDN1-QRC8GW, MSABDU-18HRDN1-QRC8GW:...
  • Page 13 MSABEU-24HRDN1-QRC8GW...

  • Page 14: Outdoor Unit

    5.2 Outdoor Unit MOZ-09HFN1-QRD0GW, MOZ-12HFN1-QRD0GW:...
  • Page 15 MOZ1-18HFN1-QRDOGW:...
  • Page 16 MOF-22HFN1-QRD0GW:...

  • Page 17: Installation Details

    6 Installation Details 6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) Ф15.9 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Nominal cross-sectional area (mm²) Rated current of appliance >3 and ≤6...

  • Page 18: Pipe Length And The Elevation

    6.3 Pipe length and the elevation The pipe length and refrigerant amount: Standard Max. Max. Additional Pipe size Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) 3/8’’ 1/4’’ MSABAU-09HRDN1-QRC8GW + (Ф6.35) MOZ-09HFN1-QRD0GW (Ф9.52) 3/8’’ 1/4’’ MSABBU-12HRDN1-QRC8GW + (Ф6.35) MOZ-12HFN1-QRD0GW (Ф9.52)

  • Page 19: Installation For The First Time

    4) Fully open the handle Lo of the manifold 6.4 Installation for the first time valve. 5) Operate the vacuum pump to evacuate. Air and moisture in the refrigerant system have 6) Make evacuation for 30 minutes and check undesirable effects as below: whether the compound meter indicates ●...

  • Page 20: Adding The Refrigerant After Running The System For Many Years

    charge set. Purge the air by loosening the flare and press the check valve on the charge set to nut on the 2-way valve approximately 45’ for 3 purge the air (be careful of the liquid seconds then closing it for 1 minute; repeat 3 refrigerant).

  • Page 21: Re-Installation While The Indoor Unit Need To Be Repaired

    4) Operate the air conditioner at the cooling and stop it when the gauge indicates 0.1MPa. mode. 6). Set the 3-way valve to the closed position 5) Open the valves (Low side) on the charge set immediately and charge the system with liquid refrigerant. Do this quickly so that the gauge ends up 6).When the electronic scale displays the proper indicating 0.3 to 0.5Mpa.

  • Page 22: Re-Installation While The Outdoor Unit Need To Be Repaired

    Be sure 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 check the gas leakage.
  • Page 23 Be sure to check for gas leakage...

  • Page 24: Operation Characteristics

    7. Operation Characteristics Mode Cooling operation Heating operation Drying operation Temperature Room temperature 17℃~32℃ 0℃~30℃ 10℃~32℃ (62℉~90℉) (32℉~86℉) (50℉~90℉) Outdoor temperature 0℃~50℃ -15℃~30℃ 0℃~50℃ (32℉~122℉) (5℉~86℉) (32℉~122℉) -15℃~50℃ (5℉~122℉) (For the models with low temperature cooling system) CAUTION: 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.

  • Page 25: Electronic Function

    Dispalys ‘ ’ during self clean operation (if 8. Electronic function aplicable). 8.1 Abbreviation Dispalys ‘ ’ under 8℃ heating operation (if T1: Indoor room temperature aplicable). T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board.

  • Page 26: Main Protection

    compressor has stopped for over 3 hours, the 8.3 Main Protection compressor heating cable will work. Preheating mode: 8.3.1 Three minutes delay at restart for A weak current flow through the coil of compressor compressor from the wiring terminal of the 1 minute delay for the 1 time stand-up and 3 compressor, then the compressor is heated...

  • Page 27: Operation Modes And Functions

    Setting fan T1-Td ℃(°F) Actual fan speed speed 8.4 Operation Modes and Functions H+(H+=H+G) H（=H） 8.4.1 Fan mode H-（H-=H-G) ( 1) Outdoor fan and compressor stop. M+(M+=M+Z) M(M=M) (2) Temperature setting function is disabled, M-(M-=M-Z) and no setting temperature is displayed. L+(L+=L+D) (3) Indoor fan can be set to L(L=L)
  • Page 28 to stop the unit per minute ---4℃≤T2<7℃, the compressor will keep the T1-Td current frequency. -1.5 ---T2>7℃, the compressor frequency will not be -2.5 (H+-L)*0.2+L limited. -3.5 (H+-L)*0.4+L -4.5 (H+-L)*0.6+L -5.5 (H+-L)*0.6+L 8.4.3 Heating Mode -6.5 8.4.3.1 Outdoor fan running rules -7.5 (H+-L)*0.8+L -8.5...
  • Page 29 For MSABAU-09HRFN1-QRD0GW, If the machine switches mode between heating MSABBU-12HRFN1-QRD0GW, and cooling, the compressor will keep stopping MSABDU-18HRFN1-QRD0GW, for 15 minutes and then choose mode MSABEU-22HRFN1-QRD0GW models: according to T1-Ts. If the setting temperature is modified, the machine will choose running function again. Compressor 4-Way valve 8.4.5 Drying mode...
  • Page 30 “timer off” function. And when reaching the With this new technology, the display area will show “EC” when the outdoor unit detects setting time, the timer LED will be off and the AC running mode has not been changed. refrigerant leakage. 8.4.7.7 The setting time is relative time.
  • Page 31 temperature sensor will be shielded, but the error detective function of room temperature sensor will be still valid. When the follow me function is available, the PCB will control the unit according to the room temperature from the remote controller and the setting temperature.

  • Page 32: Troubleshooting

    9. Troubleshooting Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

  • Page 33: Indoor Unit Error Display

    9.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 3 times Zero-crossing signal detection error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 34: Trouble Shooting

    9.2 Trouble shooting 9.2.1 EEPROM parameter error diagnosis and solution(E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback conditions from EEPROM chip. Supposed causes Installation mistake ● PCB faulty ● Trouble shooting: Power off, then restart the unit 2 minutes later.
  • Page 35 9.2.2 Indoor / outdoor unit’s communication diagnosis and solution(E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions seconds and this condition happens four times continuously. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ●...
  • Page 36 9.2.4 Fan speed has been out of control diagnosis and solution(E3) Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, conditions the unit will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 37 Index1: 1:Indoor 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 the range showing in below table, the PCB must has problems and need to be replaced.
  • Page 38 9.2.4 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions 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 3 times, the display area will show “EC”...
  • Page 39 9.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) E4/E5/F1/F2/F3 Error Code Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, conditions the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 40 9.2.6 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off. conditions Supposed causes Wiring mistake ●...
  • Page 41 9.2.7 Over voltage or too low voltage protection diagnosis and solution(P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 42 9.2.8 High temperature protection of compressor top diagnosis and solution(P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Power supply problems. ● System leakage or block ● PCB faulty ●...
  • Page 43 9.2.9 Inverter compressor drive error diagnosis and solution(P4) Error Code Malfunction decision An abnormal inverter compressor drive is detected by a special conditions detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Supposed causes Wiring mistake ●...
  • Page 44 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.
  • Page 45 Appendix 1 Temperature Sensor Resistance Value Table (℃--K) ℃ ℃ ℃ ℃ K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000 1.96532...
  • Page 46 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN98D22UFZ DA130M1C-31FZ DA200S2C-10MT Blue - Red 1.57Ω 1.77Ω 0.51Ω Blue - Black (20℃/68℉) (20℃/68℉) (20℃/68℉) Red - Blue...

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