Midea MO11MU-09HRDN1 Service Manual
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Midea MO11MU-09HRDN1 Service Manual

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DM12-01.01.10en
OASIS Inverter SERIES
Service Manual 2012
MS11MU-09HRDN1 / MO11MU-09HRDN1
MS11MU-12HRDN1 / MO11MU-12HRDN1
MS11MU-18HRDN1 / MO11MU-18HRDN1
MS11MU-24HRDN1 / MO11MU-24HRDN1
Service manual
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Summary of Contents for Midea MO11MU-09HRDN1

  • Page 1 DM12-01.01.10en OASIS Inverter SERIES Service Manual 2012 MS11MU-09HRDN1 / MO11MU-09HRDN1 MS11MU-12HRDN1 / MO11MU-12HRDN1 MS11MU-18HRDN1 / MO11MU-18HRDN1 MS11MU-24HRDN1 / MO11MU-24HRDN1 Service manual...

  • Page 2: Table Of Contents

    Oasis Inverter DM12-01.01.10en CONTENTS   1. Precaution ..............................3 1.1 Safety Precaution ........................3   1.2 Warning ............................3     2. Function ................................ 7   3. Specification ..............................8   4. Dimension ..............................12 4.1 Indoor Unit ..........................12   4.2 Outdoor Unit ..........................

  • Page 3: Precaution

    DM12-01.01.10en Oasis Inverter 1. Precaution 1.1 Safety Precaution  To prevent injury to the user or other people and property damage, the following instructions must be followed.  Incorrect operation due to ignoring instruction will cause harm or damage.  Before service the unit, be sure to read this service manual at first.
  • Page 4 Oasis Inverter DM12-01.01.10en  For installation, always contact the dealer or an authorized service center.  Do not install the product on a defective installation stand.  Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.
  • Page 5 DM12-01.01.10en Oasis Inverter  Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is 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.
  • Page 6 Oasis Inverter DM12-01.01.10en  Operational  Do not expose the skin directly to cool air for long time. (Do not sit in the draft).  Do not use the product for special purposes, such as preserving foods, works of art etc. It is a consumer air conditioner, not a precision refrigerant system.

  • Page 7: Function

    DM12-01.01.10en Oasis Inverter 2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units MS11MU-09HRDN1 MO11MU-09HRDN1 MS11MU-12HRDN1 MO11MU-12HRDN1 Inverter MS11MU-18HRDN1 MO11MU-18HRDN1 MS11MU-24HRDN1 MO11MU-24HRDN1 Indoor unit  Filter  Killer of Formaldehyde  Plasma  Silver Ion Filter  Self-Clean ...

  • Page 8: Specification

    Oasis Inverter DM12-01.01.10en 3. Specification Indoor  MS11MU-09HRDN1 MS11MU-12HRDN1 Outdoor  MO11MU-09HRDN1 MO11MU-12HRDN1 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph Power supply  Ph‐V‐Hz  9000(2050~11800) 12000(4000~14200) Btu/h  Capacity                            2,64 (0,60 - 3,46) 3,52 (1,17 - 4,16) kW ...
  • Page 9 DM12-01.01.10en Oasis Inverter width      g.Number of circuits     600/500/350 700/570/460 Indoor air flow (Hi/Mi/Lo)  /h  40/36/27 42/37/31 Indoor noise level (Hi/Mi/Lo)  dB(A)  750x280x198 835x280x198 Dimension(W*D*H)  mm  830x270x355 910x270x355 Indoor unit  Packing      (W*D*H)  mm  8 / 10 9 / 11 Net/Gross weight      Kg  YDK24-6P(B) YDK24-6P(B) Model ...
  • Page 10 Oasis Inverter DM12-01.01.10en Indoor  MS11MU-18HRDN1 MS11MU-24HRDN1 Outdoor  MO11MU-18HRDN1 MO11MU-24HRDN1 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph Power supply  Ph‐V‐Hz  18000(5000~19000) 24000(12000~26000) Btu/h  Capacity                              5,28 (1,47 - 5,57) 7,03 (3,52 - 7,62) kW ...
  • Page 11 DM12-01.01.10en Oasis Inverter 48/38/32 50/47/39 Indoor noise level (Hi/Mi/Lo)  dB(A)  990x315x218 1186x340x258 Dimension(W*D*H)  mm  1065x300x400 1265x420x340 Indoor unit  Packing      (W*D*H)  mm  12 / 14 16 / 20 Net/Gross weight      Kg  YDK24-6G YDK55-6G Model       Welling Board-ocean Brand       Outdoor fan  67/48 103/78 Input ...

  • Page 12: Dimension

    Oasis Inverter DM12-01.01.10en 4. Dimension 4.1 Indoor Unit Model MS11MU-09HRDN1 MS11MU-12HRDN1 MS11MU-18HRDN1 MS11MU-24HRDN1 1186 Service manual...
  • Page 13 DM12-01.01.10en Oasis Inverter Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) MS11MU-09HRDN1 ￠65 MS11MU-12HRDN1 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) MS11MU-18HRDN1 ￠65 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) MS11MU-24HRDN1 ￠65 Service manual...

  • Page 14: Outdoor Unit

    Oasis Inverter DM12-01.01.10en 4.2 Outdoor Unit More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 70cm Model MO11MU-09HRDN1 MO11MU-12HRDN1 MO11MU-18HRDN1 MO11MU-24HRDN1 Service manual...

  • Page 15: Capacity Tables

    DM12-01.01.10en Oasis Inverter 5. Capacity tables MS11MU-09HRDN1 / MO11MU-09HRDN1 Cooling Cooling Outdoor conditions (DB) Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC 2.85 2.72 2.59 2.46 2.35 21/15ºC DB/WB 2.05 2.01 1.99 1.96 1.97 Input 2.58 2.67 2.90 3.03 3.12 2.90...
  • Page 16 Oasis Inverter DM12-01.01.10en MS11MU-12HRDN1 / MO11MU-12HRDN1 Cooling Cooling Outdoor conditions (DB) Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC 3.80 3.63 3.45 3.27 3.13 21/15ºC DB/WB 2.74 2.68 2.66 2.62 2.63 Input 2.58 2.68 2.91 3.04 3.13 3.87 3.73 3.56 3.38 3.17 24/17ºC DB/WB...
  • Page 17 DM12-01.01.10en Oasis Inverter MS11MU-18HRDN1 / MO11MU-18HRDN1 Cooling Cooling Outdoor conditions (DB) Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC 5.70 5.44 5.17 4.91 4.70 21/15ºC DB/WB 4.11 4.02 3.98 3.93 3.95 Input 2.73 2.83 3.07 3.21 3.31 5.81 5.60 5.33 5.07 4.75 24/17ºC DB/WB...
  • Page 18 Oasis Inverter DM12-01.01.10en MS11MU-24HRDN1 / MO11MU-24HRDN1 Cooling Cooling Outdoor conditions (DB) Indoor Conditions (kW) 18ºC 21ºC 28ºC 35ºC 43ºC 7.59 7.24 6.89 6.54 6.26 21/15ºC DB/WB 5.47 5.36 5.30 5.23 5.26 Input 2.57 2.66 2.89 3.02 3.11 7.73 7.45 7.10 6.75 6.33 24/17ºC DB/WB...

  • Page 19: Refrigerant Cycle Diagram

    DM12-01.01.10en Oasis Inverter 6. Refrigerant Cycle Diagram INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE (Heating Model only) ACCUMULATOR COOLING COMPRESSOR HEATING Service manual...

  • Page 20: Wiring Diagram

    Oasis Inverter DM12-01.01.10en 7. Wiring Diagram 7.1 Indoor Unit MS11MU-09HRDN1, MS11MU-12HRDN1, MS11MU-18HRDN1, MS11MU-24HRDN1 Service manual...

  • Page 21: Outdoor Unit

    DM12-01.01.10en Oasis Inverter 7.2 Outdoor Unit MO11MU-09HRDN1, MO11MU-12HRDN1 MO11MU-18HRDN1 Service manual...
  • Page 22 Oasis Inverter DM12-01.01.10en MO11MU-24HRDN1 Service manual...

  • Page 23: Installation Details

    DM12-01.01.10en Oasis Inverter 8 Installation Details 8.1 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) Ф16 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 8.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet.

  • Page 24: Pipe Length And The Elevation

    Pipe size Standard Max. Max. Additional Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) MS11MU-09HRDN1 / MO11MU-09HRDN1 3/8’’ 1/4’’ 9.53 6.35 MS11MU-12HRDN1 / MO11MU-12HRDN1 1/2’’ 1/4’’ MS11MU-18HRDN1 / MO11MU-18HRDN1 12.7 6.35 5/8’’ 3/8’’ MS11MU-24HRDN1 / MO11MU-24HRDN1 16.0 9.53...

  • Page 25: Installation For The First Time

    DM12-01.01.10en Oasis Inverter 8.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
  • Page 26 Oasis Inverter DM12-01.01.10en the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
  • Page 27 DM12-01.01.10en Oasis Inverter 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position. Be sure to use a hexagonal wrench to operate the valve stems. 7).

  • Page 28: Adding The Refrigerant After Running The System For Many Years

    Oasis Inverter DM12-01.01.10en from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage.

  • Page 29: Re-Installation While The Indoor Unit Need To Be Repaired

    DM12-01.01.10en Oasis Inverter conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. 8.6 Re-installation while the indoor unit need to be repaired 1.
  • Page 30 Oasis Inverter DM12-01.01.10en Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts. Use a torque wrench to tighten the 3-way valves service port cap to a torque of 1.8 kgf.m. Be sure to check for gas leakage.

  • Page 31: Re-Installation While The Outdoor Unit Need To Be Repaired

    DM12-01.01.10en Oasis Inverter 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position 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.
  • Page 32 Oasis Inverter DM12-01.01.10en 2. Refrigerant charging Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
  • Page 33 DM12-01.01.10en Oasis Inverter Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage Service manual...

  • Page 34: Operation Characteristics

    Oasis Inverter DM12-01.01.10en 9. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode Room temperature ≥17℃ ≤30℃ ＞10℃ Outdoor temperature 0℃～50℃ -15℃～34℃ 0℃～50℃ 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 35: Electronic Function

    DM12-01.01.10en Oasis Inverter 10. Electronic function 10.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 10.2 Display function 10.2.1 Icon explanation on indoor display board. FRESH indication lamp: This lamp illuminates when Clean Air feature is activated.

  • Page 36: Main Protection

    Oasis Inverter DM12-01.01.10en 10.3 Main Protection 10.3.1 Three Minutes Delay at restart for compressor 1 minute delay for the 1 time start-up and 3 minutes delay for others. 10.3.2 Temperature protection of compressor top The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp.
  • Page 37 DM12-01.01.10en Oasis Inverter 10.3.8 Zero crossing detection error protection If AC detects time interval is not correct for continuous 240s, the unit will stop and the LED will display the failure. The correct zero crossing signal time interval should be between 6-13ms. Service manual...

  • Page 38: Operation Modes And Functions

    Oasis Inverter DM12-01.01.10en 10.4 Operation Modes and Functions 10.4.1 Fan mode ( 1) Outdoor fan and compressor stop. (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: 27.5 High...
  • Page 39 DM12-01.01.10en Oasis Inverter 7 minutes later, the compressor running frequency will be controlled as below: -0.5 -1.0 While Temp. zone Frequency Note: When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules: A~E: Increase the frequency to the higher level until to F8.
  • Page 40 Oasis Inverter DM12-01.01.10en When AC is in “hold” zone for 3 minutes, the compressor frequency will rise to the higher level.(frequency will increase twice at most) 10.4.2.2 Outdoor fan running rules High 10.4.2.3 Indoor fan running rules In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto.
  • Page 41 DM12-01.01.10en Oasis Inverter 10.4.3 Heating Mode 10.4.3.1 Compressor running rules: The maximum operation frequency of the compressor after starting submits to the following rule. Fmax=F2 Fmax=F3 Fmax=F4 Fmax=F5 Fmax=F6 Fmax=F7 Fmax=F8 Fmax=F9 Fmax=F10 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp.
  • Page 42 Oasis Inverter DM12-01.01.10en +5.0 +4.5 +3.5 +3.0 +2.5 +2.0 +1.5 +1.0 +0.5 While Temp. zone Frequency ∆T=0C as default. Note: When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules: A~E: Increase the frequency to the higher level until to F10. F: Keep the current frequency.
  • Page 43 DM12-01.01.10en Oasis Inverter Off: Compressor stops. Decrease: Decrease the running frequency to the lower level. Hold: Keep the 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. (The frequency will increase twice at most) 10.4.3.2 Outdoor fan running rules High...
  • Page 44 Oasis Inverter DM12-01.01.10en If the compressor stops caused by the room temperature rising, the indoor fan will be forced to run 127 seconds with breeze. During this period, the anti-cold-wind is disabled. If the machine runs in rating capacity test mode, the indoor fan will run with rating speed and the anti-cold-wind function is disabled.
  • Page 45 DM12-01.01.10en Oasis Inverter normal heating mode. ----T3 rises to be higher than TCDE1C. ----T3 keeps to be higher than TCDE2C for 80 seconds. ----The machine has run for 10 minutes in defrosting mode. While TCDE1=12C, TCDE2=8C. Defrosting action： For 9k,12k models: Service manual...
  • Page 46 Oasis Inverter DM12-01.01.10en For 18k, 24k models: Model MO11MU-18HRDN1 MO11MU-24HRDN1 10.4.3.5 Evaporator coil temperature protection ----T2> TEH2C, the compressor running frequency decreases to the lower level and runs for 20s. When the frequency decreases to F2 and the T2 is still over TEH2C for 3 minutes, the compressor will stop.
  • Page 47 DM12-01.01.10en Oasis Inverter 10.4.4 Auto-mode This mode can be chosen with remote controller and the setting temperature can be changed between 17~30C. In auto mode, the machine will choose cooling, heating or fan-only mode according to ∆T (∆T =T1-Ts). ∆T=T1-Ts Running mode ∆T＞1C Cooling...
  • Page 48 Oasis Inverter DM12-01.01.10en frequency limit are active and the same as that in cooling mode. 10.4.5.5 The outdoor fan operates the same as in cooling mode. 10.4.6 Forced operation function 10.4.6.1 Enter forced operation function: When the machine is off, pressing the touch button will carry the machine to forced auto mode. After this, if pressing the button once again within 5 seconds, the machine will turn into forced cooling mode.
  • Page 49 DM12-01.01.10en Oasis Inverter 10.4.8 Sleep function mode 10.4.8.1 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode and turns off. 10.4.8.2. Operation process in sleep mode is as follow: When cooling, the setting temperature rises 1C (be lower than 30C) every one hour, 2 hours later the setting temperature stops rising and the indoor fan is fixed at low speed.
  • Page 50 Oasis Inverter DM12-01.01.10en 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. The PCB will take action to the mode change information from remote controller signal, but it will not affected by the setting temperature.
  • Page 51 DM12-01.01.10en Oasis Inverter 10.4.15 8℃ Heating In heating operation, the preset temperature of the air conditioner can be as lower as 8℃, which keeps the room temperature steady at 8℃ and prevents household things freezing when the house is unoccupied for a long time in severe cold weather. Service manual...

  • Page 52: Troubleshooting

    Oasis Inverter DM12-01.01.10en 11. Troubleshooting 11.1 Indoor Unit Error Display Operation lamp Timer lamp Display LED STATUS Indoor unit EEPROM parameter error ☆ 1 time Indoor / outdoor units communication error ☆ 2 times ☆ 3 times Zero-crossing signal error ☆...

  • Page 53: Diagnosis And Solution

    DM12-01.01.10en Oasis Inverter 11.2 Diagnosis and Solution 11.2.1 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in PCB well? Correct the connection Replace the main PCB Service manual...
  • Page 54 Oasis Inverter DM12-01.01.10en 11.2.2 Indoor / outdoor units communication error Power off, then power on the A/C by the breaker. (Reconnect the power wire). Is the E1 extinguished? Check the wiring on the outdoor terminal and indoor terminal follow the wiring diagram. Is all the connecting correctly? -24V<Vs<+24V? (Vs is the voltage between S and N).
  • Page 55 DM12-01.01.10en Oasis Inverter 11.2.3 Zero crossing detection error This is alarm signal when the main chip can’t detect over-zero signal. When such failure occurs, the main control board must have fault. 11.2.4 Indoor fan speed has been out of control diagnosis Shut off the power supply and turn on it 5s later The unit does not...
  • Page 56 Oasis Inverter DM12-01.01.10en 11.2.5 Open or short circuit of temperature sensors diagnosis and solution Check the connections between the sensors and the PCB. Are the connections good? Replace the sensor and check if Replace the indoor PCB the errors happen again? Service manual...
  • Page 57 DM12-01.01.10en Oasis Inverter 11.2.6 Outdoor fan speed has been out of control diagnosis Shut off the power supply and turn on it 5s later The unit does not work normally Turn off the unit, rotate the cross Disassemble the connection between fan.
  • Page 58 Oasis Inverter DM12-01.01.10en 11.2.7 IPM malfunction or IGBT over-strong current protection Check whether the connections between the outdoor unit PCB and IPM are good? Check whether the IPM is fixed to radiator Fastening the IPM to the tightly radiator The unit does not work normally Replace the compressor Replace the IPM 11.2.8 Over voltage or over low voltage protection diagnosis and solution...
  • Page 59 DM12-01.01.10en Oasis Inverter 11.2.9 High temperature protection of compressor top diagnosis and solution Does the compressor operate? Is the connection good? Reconnect it Is refrigerant circulation volume Is protector normal? Replace it normal? Charge refrigerant Replace the outdoor PCB Is the abnormality the same after gas charging? There block...
  • Page 60 Oasis Inverter DM12-01.01.10en 11.2.11 Inverter compressor drive error diagnosis and solution Is the connection of compressor good? Is the wiring sequence right? Is the Reconnect and retry voltage range proper? Replace the inverter compressor Replace the outdoor PCB Service manual...

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