Midea MSAEAU-09HRFN1-QRD0GW Service Manual
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Midea MSAEAU-09HRFN1-QRD0GW Service Manual

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All Easy 3D Inverter Series
Service Manual 2017

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Summary of Contents for Midea MSAEAU-09HRFN1-QRD0GW

  • Page 1 All Easy 3D Inverter Series Service Manual 2017...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution .............................. 3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Model list ..............................6 3. Dimension .............................. 7 3.1 Indoor Unit ............................. 7 3.2 Outdoor Unit ..........................11 4 .Refrigerant Cycle Diagram ........................15 5 .Installation Details..........................17 5.1 Wrench torque sheet for installation ...................

  • 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.  To prevent injury to the user or other ...
  • Page 4 disconnect the power supply cable. A bad connection may cause water leakage.  There is risk of electric shock or fire. Keep level even when installing the  Stop operation and close the window product. in storm or hurricane. If possible, remove It can avoid vibration of water leakage.
  • Page 5 is operated.  Do not drink the water drained from the product.  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: Model List

    2. Model list Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units MSAEAU-09HRFN1-QRD0GW MOBA31-09HFN1-QRDOGW MSAEAU-09HRFNX-QRD0GW MOBA31-09HFN1-QRDOGW MSAEBU-12HRFN1-QRD0GW MOB31-12HFN1-QRD0GW MSAEBU-12HRFNX-QRD0GW MOB31-12HFN1-QRD0GW MSAEBU-12HRFN1-QRD0GW(B) MOB32-12HFN1-QRD0GW 3D inverter MSAECU-18HRFN1-QRD0GW MOB31-18HFN1-QRD0GW MSAECU-18HRFN1-QRD0GW MOB32-18HFN1-QRD0GW(S1) MSAECU-18HRFNX-QRD0GW MOB32-18HFN1-QRD0GW(S1) MSAEDU-24HRFN1-QRD0GW MOCA30-24HFN1-QRD0GW MSAEDU-24HRFNX-QRD0GW MOCA30-24HFN1-QRD0GW MSAEDU-24HRFN1-QRD0GW(B) MOCA30-24HFN1-QRC8GW...

  • Page 7: Dimension

    3. Dimension 3.1 Indoor Unit Model MSAEAU-09HRFN1-QRD0GW MSAEAU-09HRFNX-QRD0GW MSAEBU-12HRFN1-QRD0GW MSAEBU-12HRFNX-QRD0GW MSAEBU-12HRFN1-QRD0GW(B) MSAECU-18HRFN1-QRD0GW MSAECU-18HRFNX-QRD0GW 1106 MSAEDU-24HRFN1-QRD0GW 1106 MSAEDU-24HRFNX-QRD0GW 1106 MSAEDU-24HRFN1-QRD0GW(B)
  • Page 8 For MSAEAU-09HRFN1-QRD0GW, MSAEAU-09HRFNX-QRD0GW...
  • Page 9 For MSAEBU-12HRFN1-QRD0GW, MSAEBU-12HRFN1-QRD0GW(B), MSAEBU-12HRFNX-QRD0GW For MSAECU-18HRFN1-QRD0GW, MSAECU-18HRFNX-QRD0GW...
  • Page 10 For MSAEDU-24HRFN1-QRD0GW, MSAEDU-24HRFN1-QRD0GW(B), MSAEDU-24HRFNX-QRD0GW...

  • Page 11: Outdoor Unit

    3.2 Outdoor Unit...
  • Page 12 For MOBA31-09HFN1-QRDOGW, 779 W3 487 W1 300 D 770 W 70 W2 25 B1 61.5 A2 12 A1...
  • Page 13 For MOB31-12HFN1-QRD0GW, MOB32-12HFN1-QRD0GW ,MOB31-18HFN1-QRD0GW, MOB32-18HFN1-QRD0GW(S1 815 W3 514 W1 333 D 800 W 70 W2 62 B1 D2 D3 20 A1 61.6 A2...
  • Page 14 For MOCA30-24HFN1-QRD0GW, MOCA30-24HFN1-QRC8GW,...

  • Page 15: Refrigerant Cycle Diagram

    4 .Refrigerant Cycle Diagram MOBA31-09HFN1-QRDOGW,MOB31-12HFN1-QRD0GW,MOB31-18HFN1-QRD0GW, MOCA30-24HFN1-QRD0GW, MOB32-18HFN1-QRD0GW(S1) INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE T3 Condenser temp. sensor CAPILIARY TUBE HEAT EXCHANGE HEAT (EVAPORATOR) T4 Ambient T1 Room temp. EXCHANGE temp. sensor sensor (CONDENSER) T2 Evaporator temp.
  • Page 16 MOCA30-24HFN1-QRC8GW, INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE (EVAPORATOR) HEAT T4 Ambient T1 Room temp. T2 Evaporator EXCHANGE temp. sensor sensor temp. sensor (CONDENSER) middle T2B Evaporator temp. sensor outlet GAS SIDE 4-WAY VALVE Accumulator...

  • Page 17: Installation Details

    5 .Installation Details 5.1 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) 5.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²) >3 and ≤6...

  • Page 18: 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) MSAEAU-09HRFN1-QRD0GW + 3/8’’ 1/4’’ MOBA31-09HFN1-QRDOGW (Ф9.52) (Ф6.35) MSAEAU-09HRFNX-QRD0GW + 3/8’’ 1/4’’ MOBA31-09HFN1-QRDOGW (Ф9.52) (Ф6.35) MSAEBU-12HRFN1-QRD0GW + 3/8’’ 1/4’’...

  • Page 19: Installation For The First Time

    connection to the vacuum pump. 5.4 Installation for the first time 4) Fully open the handle Lo of the manifold Air and moisture in the refrigerant system have valve. undesirable effects as below: 5) Operate the vacuum pump to evacuate. ●...

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

    disconnected from the vacuum pump to the 2). Purge the air from the charge hose. valve at the bottom of the cylinder. If the Open the valve at the bottom of the cylinder refrigerant is R410A, make the cylinder bottom and press the check valve on the charge set to up to ensure the liquid charge.

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

    2). Connect the charge hose with the push pin of 6) Make evacuation for 30 minutes and check handle lo to the 3-way valves gas service port. whether the compound meter indicates 3). Air purging of the charge hose. -0.1Mpa. If the meter does not indicate Open the handle Lo valve of the manifold valve -0.1Mpa after pumping 30 minutes, it should be slightly to purge air from the charge hose for 5...
  • Page 22 turn off the vacuum pump, and confirm that the 2). Purge the air from the charge hose gauge needle does not move (approximately 5 Open the valve at the bottom of the cylinder minutes after turning off the vacuum pump). and press the check valve on the charge set to 5).

  • Page 23: Disassemble Guide

    6. Disassemble Guide 6.1 How to Remove the filter Step1: Put your hands at A and B, lift the filter a little to loosen the fastener Step2: Pull the filter gently along the horizontal direction. Step3: Pull out the filter. 6.2 How to Remove the horizontal louver Step1: Open the horizontal louver ,push the locker...
  • Page 24 How to hold the indoor for piping connection Step1: Open the screw caps A and B, remove the two screws. Step2: Open the panel assembly, move the slider to fix the panel. Step3: Press the locker A and B, to lose the indoor from the installation plate Step4: Unfold the supporter of Installation plate, then...
  • Page 25 6.4 How to Remove the panel assembly Step1: Open the screw caps A and B, remove the two screws. Step2: Open the panel assembly, loosen the display board connector. Step3: Pull the panel assembly along the direction indicated in right image to remove it.
  • Page 26 6.5 How to Remove the PCB Step1: Press A to remove the terminal cover. Step2: Remove screw B to remove the cover of the electronic control box . Step3: Then you can remove the PCB. Note: It is not necessary to remove the panel to remove the PCB.
  • Page 27 6.7 How to Remove the Chassis assembly CAUTION: Because the 24K indoor unit is relatively large and heavy, it must have two persons to implement the following steps. Step1: Remove the left and right pipe cover. Step2: Remove the 5 screws A,B,C,D,E remove support part F and G.
  • Page 28 Remove Evaporator assembly CAUTION: Because the 24K indoor unit is relatively large and heavy, it must have two persons to implement the following steps. Step1: Remove the Electric control box. Step2: Remove the Chassis assembly Step3: Unfold the Pipe clamp board C, remove screw A and B.

  • Page 29: Wiring Diagram

    7. Wiring Diagram 7.1 Indoor Unit MSAEAU-09HRFN1-QRD0GW, MSAEAU-09HRFNX-QRD0GW, MSAEBU-12HRFN1-QRD0GW, MSAEBU-12HRFNX-QRD0GW, MSAEBU-12HRFN1-QRD0GW(B), MSAECU-18HRFN1-QRD0GW, MSAECU-18HRFNX-QRD0GW, MSAEDU-24HRFN1-QRD0GW, MSAEDU-24HRFNX-QRD0GW, MSAEDU-24HRFN1-QRD0GW(B)

  • Page 30: Outdoor Unit

    7.2 Outdoor Unit MOBA31-09HFN1-QRD0GW, MOB31-12HFN1-QRD0GW, MOB32-12HFN1-QRD0GW, MOB32-18HFN1-QRD0GW(S1)
  • Page 31 MOB31-18HFN1-QRD0GW, MOCA30-24HFN1-QRD0GW, MOCA30-24HFN1-QRC8GW...

  • Page 32: Operation Characteristics

    8. Operation Characteristics Mode Cooling operation Heating operation Drying operation Temperature Room 17℃~32℃ 0℃~30℃ 10℃~32℃ temperature (62℉~90℉) (32℉~86℉) (50℉~90℉) Outdoor 0℃~50℃ -15℃~30℃ 0℃~50℃ temperature (32℉~122℉) (5℉~86℉) (32℉~122℉) -15 ℃ ~50 ℃ (5 ℉ -25℃~50℃ (-13℉~122℉) ~122℉) (For (For the models with MSAECU-18HRFN1-QRD0 low temperature GW(S1))

  • Page 33: Electronic Function

    Dispalys ‘ ’ for three seconds when Fresh, 9. Electronic function Swing, Turbo or Silence feature is cancelled. 9.1 Abbreviation Dispalys ‘ ’ under deforsting operation. T1: Indoor room temperature Dispalys ‘ ’ when anti-cold air feature is T2: Coil temperature of evaporator T3: Coil temperature of condenser activated under heating mode.

  • Page 34: Main Protection

    9.3 Main Protection When compressor is active, the value of the Coil temperature of evaporator T2 has no 9.3.1 Three minutes delay at restart for change or very little change. compressor Less than 1 minute delay for the 1 time start-up and 3 minutes delay for others.

  • Page 35: Operation Modes And Functions

    (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates same as in cooling mode. (5) Auto fan: For MSAEAU-09HRFN1-QRD0GW, MSAEAU-09HRFNX-QRD0GW, MSAEBU-12HRFN1-QRD0GW, 9.4.2 Cooling Mode MSAEBU-12HRFNX-QRD0GW, 9.4.2.1 Compressor running rules MSAEBU-12HRFN1-QRD0GW(B), When T1- Ts <ΔT -2℃, the compressor will...
  • Page 36 For MSAEAU-09HRFN1-QRD0GW, MSAEAU-09HRFNX-QRD0GW, MSAEBU-12HRFN1-QRD0GW, MSAEBU-12HRFNX-QRD0GW, MSAEBU-12HRFN1-QRD0GW(B), MSAECU-18HRFN1-QRD0GW(S1), MSAECU-18HRFNX-QRD0GW(S1) models, Decrease 9.4.2.3Indoor fan running rules Hold In cooling mode, indoor fan runs all the time Increase and the speed can be selected as high, medium, low and auto. Resume When the setting temperature is reached, if the compressor stop running, indoor fan motor will run in Minimum speed or setting speed.
  • Page 37 9.4.3.2 Outdoor fan running rules For different outdoor units, the fan speeds are different. 9.4.3.3 Indoor fan running rules For MSAEAU-09HRFN1-QRD0GW, MSAEAU-09HRFNX-QRD0GW, When the compressor is on, the indoor fan can MSAEBU-12HRFN1-QRD0GW, be set to high/med/low/auto/mute.
  • Page 38 ----T3 rises to be higher than TCDE1℃. ----T3 keeps to be higher than TCDE2℃ for 80 seconds. 9.4.3.4 Defrosting mode ----The machine has run for 10 minutes in For MSAEAU-09HRFN1-QRD0GW, defrosting mode. MSAEAU-09HRFNX-QRD0GW, MSAEBU-12HRFN1-QRD0GW, 9.4.3.5 Evaporator coil temperature MSAEBU-12HRFNX-QRD0GW,...
  • Page 39 cooling, heating or auto mode. 9.4.7.2. Operation process in sleep mode is as T1-Ts follow: Cooling When cooling, the setting temperature rises 1℃ (be lower than 30℃) every one hour, 2 hours Fan only later the setting temperature stops rising and the indoor fan is fixed at low speed.
  • Page 40 8℃ and prevents household things freezing when the house is unoccupied for a long time in 9.4.13 Silence operation(optional) severe cold weather. Press the “silence” button on remote controller 9.4.11 Self clean(optional) to initiate SILENCE function. When the Silence For heat pump models which are provided with function is activated, the compressor running this function, after running in cooling or drying frequency will keep lower than F2 and the...
  • Page 41 9.4.15 Point check function Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.
  • Page 42 When the AC enter into the information enquiry status, it will display the code value in the next 25s , the details are as follows. Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1. All the displaying temperature is actual T2B,TP,TH, 1b,-1A value.

  • Page 43: Multi-Function Board Instruction (This Multi-Function Board Is Optional)

    9.5 Multi-function board instruction (This multi-function board is optional) 9.5.1. Function The multi-function board receives the signal of 4-cored wired controller(central controller),Non-polar wired controller and CP remote on-off signal( ON-OFF command signal) . Then converting it to the communication signal to the main control board. The multi-function board can output Alarm signal.
  • Page 44 Note: The network address are the Dip-switch F1 address plus Rotary switch ENC3 address. 9.5.4.2 If it receives the network address set by remote controller, the network address will be changed .If it receives the cancel signal of network address set by remote controller, the network address will be disposed according to the setting of Dip-switch F1 and Rotary switch ENC3.
  • Page 45 9.5.7.2 Connected to Non-poplar wired controller Note: It must use shield cables to connect with Non-poplar wired controller. The length should not exceed 50m.

  • Page 46: Troubleshooting

    10. 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 47: Indoor Unit Error Display

    10.1 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 ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 48: Trouble Shooting

    10.2 Trouble shooting 10.2.1 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: EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 49 10.2.2 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 50 Remark: Use a multi meter to test the resistance of the reactor which does not connect with capacitor. The normal value should be around zero ohm. Otherwise, the reactor must have malfunction and need to be replaced.
  • Page 51 10.2.3 Fan speed has been out of control diagnosis and solution(E3/F5) Error Code E3/F5 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 52 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 53 10.2.4 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temperatureT2 of the compressor just conditions starts running as Tcool. In the beginning 8 minutes after the compressor starts up, if T2 ＜Tcool－2℃ does not keep continuous 4 seconds and compressor running frequency higher than 50Hz does not keep continuous 3 minutes, and this situation happens 3 times, the display area will show “EC”...
  • Page 54 10.2.5 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 55 10.2.6 Overload current protection diagnosis and solution(F0) Error Code Malfunction decision An abnormal current rise is detected by checking the specified conditions current detection circuit. Supposed causes Power supply problems. ● System blockage ● PCB faulty ● Wiring mistake ● Compressor malfunction ●...
  • Page 56 10.2.7 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 conditions is abnormal, the display LED will show “P0” and AC will turn off. Supposed causes Wiring mistake ●...
  • Page 57  IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
  • Page 58 10.2.8 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 59 10.2.9 High temperature protection of IPM module diagnosis and solution (P2) Error Code Malfunction decision If the temperature of IPM module is higher than limited value, the conditions LED will display the failure. Supposed causes IPM radiator problem ● PCB faulty ●...
  • Page 60 10.2.10 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 61 10.2.11 Indoor PCB /Display board communication error (E7) Error Code Malfunction decision Indoor PCB does not receive feedback from Display board. conditions Supposed causes Wiring mistake ● PCB faulty ● Display board malfunction ● Trouble shooting:...
  • Page 62 Main parts check 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temperature(T1) sensor, Indoor coil temperature(T2) sensor, Outdoor coil temperature(T3) sensor, Outdoor ambient temperature(T4) sensor, Compressor discharge temperature(TP) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 63 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865...
  • Page 64 Appendix 2 Temperature Sensor Resistance Value Table for TP (°C --K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5...
  • Page 65 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT ASN140D21UFZ Blue - Red 1.57Ω 1.75Ω 1.28Ω 0.75Ω Blue - Black (20℃/68℉) (20℃/68℉) (20℃/68℉) (20℃/68℉) Red - Blue...

This manual is also suitable for:

Msaeau-09hrfnx-qrd0gwMsaebu-12hrfn1-qrd0gwMsaebu-12hrfnx-qrd0gwMsaebu-12hrfn1-qrd0gw(b)Msaecu-18hrfn1-qrd0gwMsaecu-18hrfnx-qrd0gw ... Show all

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