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Midea MO11MU-09HRDN1 Service Manual Download Page 2

Oasis Inverter 

 

DM12-01.01.10en

 

2  

Service 

manual 

 

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 .............................................................................................................................. 14

 

5. Capacity tables .......................................................................................................................................... 15

 

6. Refrigerant Cycle Diagram ....................................................................................................................... 19

 

7. Wiring Diagram .......................................................................................................................................... 20

 

7.1 Indoor Unit ................................................................................................................................. 20

 

7.2 Outdoor Unit .............................................................................................................................. 21

 

8 Installation Details ...................................................................................................................................... 23

 

8.1 Wrench torque sheet for installation .......................................................................................... 23

 

8.2 Connecting the cables ............................................................................................................... 23

 

8.3 Pipe length and the elevation .................................................................................................... 24

 

8.4 Installation for the first time ....................................................................................................... 25

 

8.5 Adding the refrigerant after running the system for many years ................................................ 28

 

8.6 Re-installation while the indoor unit need to be repaired ........................................................... 29

 

8.7 Re-installation while the outdoor unit need to be repaired ......................................................... 31

 

9. Operation Characteristics ......................................................................................................................... 34

 

10. Electronic function .................................................................................................................................. 35

 

10.1 Abbreviation ............................................................................................................................ 35

 

10.2 Display function ....................................................................................................................... 35

 

10.3 Main Protection ....................................................................................................................... 36

 

10.4 Operation Modes and Functions ............................................................................................. 38

 

11. Troubleshooting ....................................................................................................................................... 52

 

11.1 Indoor Unit Error Display ......................................................................................................... 52

 

11.2 Diagnosis and Solution ............................................................................................................ 53

 

 
 

 

Summary of Contents for MO11MU-09HRDN1

Page 1: ...Service manual 1 OASIS Inverter SERIES Service Manual 2012 MS11MU 09HRDN1 MO11MU 09HRDN1 MS11MU 12HRDN1 MO11MU 12HRDN1 MS11MU 18HRDN1 MO11MU 18HRDN1 MS11MU 24HRDN1 MO11MU 24HRDN1 DM12 01 01 10en...

Page 2: ...ation 23 8 2 Connecting the cables 23 8 3 Pipe length and the elevation 24 8 4 Installation for the first time 25 8 5 Adding the refrigerant after running the system for many years 28 8 6 Re installat...

Page 3: ...ot disassemble or repair the product there is risk of fire or electric shock Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely T...

Page 4: ...here is risk of fire or electric shock Do not touch operation the product with wet hands Do not place a heater or other appliance near the power cable There is risk of fire and electric shock Do not a...

Page 5: ...ere is risk of product damage or failure or unintended operation Take care to ensure that nobody could step on or fall onto the outdoor unit This could result in personal injury and product damage CAU...

Page 6: ...its Always insert the filter securely Clean the filter every two weeks or more often if necessary A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or da...

Page 7: ...18HRDN1 MO11MU 18HRDN1 21k MS11MU 24HRDN1 MO11MU 24HRDN1 Indoor unit Filter Killer of Formaldehyde Plasma Silver Ion Filter Self Clean Follow Me Auto restart Sleep mode Horizontal Swing Function Louve...

Page 8: ...W 1850 1850 Max current A 8 5 8 5 Starting current A Compressor Model DA108X1C 23EZ DA108X1C 23EZ Type ROTARY ROTARY Brand TOSHIBA TOSHIBA Capacity Btu h 11021 11021 Input W 855 855 Rated current RLA...

Page 9: ...luminium e Tube outside dia and type mm 7 innergroove tube 7 innergroove tube f Coil length x height x width mm 720x504x13 37 419x504x13 3 7 720x504x26 74 g Number of circuits 4 2 Outdoor air flow m3...

Page 10: ...r Model DA130S1C 20FZ DA150S1C 20FZ Type ROTARY ROTARY Brand GMCC GMCC Capacity Btu h 13170 15286 Input W 990 1150 Rated current RLA A 4 97 9 7 Locked rotor Amp LRA A Thermal protector 1NT01L 4639 or...

Page 11: ...innergroove tube 7 innergroove tube f Coil length x height x width mm 655x546x26 74 779x651x26 74 390x651x13 37 g Number of circuits 3 6 Outdoor air flow m3 h 2200 2700 Outdoor noise level dB A 56 59...

Page 12: ...Oasis Inverter DM12 01 01 10en 12 Service manual 4 Dimension 4 1 Indoor Unit Model W D H MS11MU 09HRDN1 750 198 280 MS11MU 12HRDN1 835 198 280 MS11MU 18HRDN1 990 218 315 MS11MU 24HRDN1 1186 258 340...

Page 13: ...m H mm Dimension of installation hole mm MS11MU 09HRDN1 180 110 45 65 MS11MU 12HRDN1 140 110 45 Model L mm R mm H mm Dimension of installation hole mm MS11MU 18HRDN1 260 135 45 65 Model L mm R mm H mm...

Page 14: ...nit More than 30cm More than 60cm More than 70cm More than 30cm More than 60cm Service space Fence or obstacles Model W D H W1 A B MO11MU 09HRDN1 670 265 540 730 481 276 MO11MU 12HRDN1 MO11MU 18HRDN1...

Page 15: ...96 2 85 2 72 2 64 2 46 27 19 C DB WB SC 2 13 2 11 2 09 2 06 2 01 Input 2 70 2 90 3 06 3 22 3 38 TC 3 01 2 90 2 80 2 75 2 53 32 23 C DB WB SC 2 50 2 47 2 43 2 42 2 36 Input 2 90 3 03 3 16 3 38 3 51 Hea...

Page 16: ...63 3 52 3 27 27 19 C DB WB SC 2 84 2 81 2 79 2 75 2 68 Input 2 71 2 91 3 07 3 23 3 39 TC 4 01 3 87 3 73 3 66 3 38 32 23 C DB WB SC 3 33 3 29 3 25 3 22 3 14 Input 2 91 3 04 3 17 3 39 3 52 Heating Heat...

Page 17: ...44 5 28 4 91 27 19 C DB WB SC 4 26 4 22 4 19 4 12 4 03 Input 2 86 3 07 3 24 3 41 3 58 TC 6 02 5 81 5 60 5 49 5 07 32 23 C DB WB SC 5 00 4 94 4 87 4 83 4 71 Input 3 07 3 21 3 34 3 58 3 72 Heating Heat...

Page 18: ...24 7 03 6 54 27 19 C DB WB SC 5 67 5 62 5 58 5 48 5 36 Input 2 70 2 89 3 05 3 21 3 37 TC 8 01 7 73 7 45 7 31 6 75 32 23 C DB WB SC 6 65 6 57 6 48 6 43 6 28 Input 2 89 3 02 3 15 3 37 3 50 Heating Heat...

Page 19: ...frigerant Cycle Diagram INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE CHECK VALVE Heating Model only CAPILIARY TUBE REVERSING...

Page 20: ...Oasis Inverter DM12 01 01 10en 20 Service manual 7 Wiring Diagram 7 1 Indoor Unit MS11MU 09HRDN1 MS11MU 12HRDN1 MS11MU 18HRDN1 MS11MU 24HRDN1...

Page 21: ...DM12 01 01 10en Oasis Inverter Service manual 21 7 2 Outdoor Unit MO11MU 09HRDN1 MO11MU 12HRDN1 MO11MU 18HRDN1...

Page 22: ...Oasis Inverter DM12 01 01 10en 22 Service manual MO11MU 24HRDN1...

Page 23: ...cm 4700 479kgf cm 19 3 4 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 Rated current of appliance...

Page 24: ...igerant g m Gas Liquid MS11MU 09HRDN1 MO11MU 09HRDN1 3 8 9 53 1 4 6 35 5 8 20 20 MS11MU 12HRDN1 MO11MU 12HRDN1 MS11MU 18HRDN1 MO11MU 18HRDN1 1 2 12 7 1 4 6 35 5 10 25 20 MS11MU 24HRDN1 MO11MU 24HRDN1...

Page 25: ...age of the connecting points of the piping If bubbles come out the pipes have leakage 1 Air purging with vacuum pump 1 Completely tighten the flare nuts of the indoor and outdoor units confirm that bo...

Page 26: ...e hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 2 Air purging by refrigerant Procedure 1 Confirm that both the 2 way and 3 way...

Page 27: ...ylinder 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 If the refrigerant is R410A make the cyl...

Page 28: ...the bottom of the cylinder If the refrigerant is R410A make the cylinder bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press t...

Page 29: ...o the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position Be sure to use a hexagonal wrench to operate the valve stems 2 Connect the charge hose with...

Page 30: ...arging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosen...

Page 31: ...the gas leakage 8 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for the whole system Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position...

Page 32: ...onto the electronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of r...

Page 33: ...DM12 01 01 10en Oasis Inverter Service manual 33 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage...

Page 34: ...e 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 bey...

Page 35: ...y board FRESH indication lamp This lamp illuminates when Clean Air feature is activated DEFROST indication lamp Lights up when the air conditioner starts defrosting automatically or when the warm air...

Page 36: ...ime the unit will stop and the LED will display the failure 10 3 5 Inverter module Protection The Inverter module has a protection function about current voltage and temperature If these protections h...

Page 37: ...l 37 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 si...

Page 38: ...rates same as in cooling mode 5 Auto fan 27 5 27 High Low 25 Medium 25 5 10 4 2 Cooling Mode 10 4 2 1 Compressor running rules The maximum operation frequency of compressor after starting submits to f...

Page 39: ...pressor will run as the below rules A E Increase the frequency to the higher level until to F8 F Keep the current frequency G Decrease the frequency to the lower level until to F1 H Run at F1 for 1h i...

Page 40: ...ondenser temperature protection 55 C T3 60 C the compressor frequency will decrease to the lower level until to F1 and then runs at F1 If T3 54 C the compressor will keep running at the current freque...

Page 41: ...Fmax F3 Fmax F5 Fmax F7 Fmax F9 Fmax F10 Fmax F8 Fmax F6 Fmax F2 34 Off 33 28 27 25 24 22 21 19 18 16 17 15 14 Fmax F4 12 11 6 5 If users switch on AC by remote controller the compressor will run at t...

Page 42: ...ps 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 G Decrease the frequency to t...

Page 43: ...mitation 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 17...

Page 44: ...wing two items are satisfied the units start defrosting The units run with T3 3 C for 40 minutes and T3 keeps lower than TCDI C for more than 3 minutes The units run with T3 3 C for 80 minutes and T3...

Page 45: ...ice manual 45 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...

Page 46: ...ection 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 sto...

Page 47: ...ng and cooling the compressor will keep stopping for 15 minutes and then choose mode according to T1 Ts If the setting temperature is modified the machine will choose running function again 10 4 5 Dry...

Page 48: ...to mode as 24 C setting temperature Forced auto mode The action of forced auto mode is the same as normal auto mode with 24 C setting temperature 10 4 7 Timer function 10 4 7 1 Timing range is 24 hour...

Page 49: ...s carried out through 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...

Page 50: ...user press Self Clean button on remote controller firstly indoor unit runs in fan only mode for a while then low heat operation and finally runs in fan only again This function can keep the inside of...

Page 51: ...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...

Page 52: ...sensor 7 times X EC Refrigerant Leakage Detection 2 times O F1 Open circuit or short circuit of outdoor ambient temperature sensor 3 times O F2 Open circuit or short circuit of condenser coil tempera...

Page 53: ...3 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...

Page 54: ...ndoor terminal follow the wiring diagram Is all the connecting correctly 24V Vs 24V Vs is the voltage between S and N No Is the wiring to the outdoor PCB connecting correctly Yes Change the outdoor PC...

Page 55: ...trol diagnosis Is the fan motor connector and connection good The unit does not work normally Turn off the unit rotate the cross fan Does it rotate freely No Disassemble the connection between the fan...

Page 56: ...ual 11 2 5 Open or short circuit of temperature sensors diagnosis and solution Yes Replace the indoor PCB Yes Check the connections between the sensors and the PCB Are the connections good Replace the...

Page 57: ...ormally Turn off the unit rotate the cross fan Does it rotate freely No Disassemble the connection between the fan and the motor check if the bearing is normal If not change the bearing If yes follow...

Page 58: ...on diagnosis and solution Is the power supply good Replace the outdoor e box Make sure the power supply is normal Yes Yes Fastening the IPM to the radiator No Check whether the connections between the...

Page 59: ...onnection parts such as the gas valve and the liquid valve Is there cool air blowing out from the indoor unit air outlet No No Is there any block Such as the capillary or the welded points of the pipe...

Page 60: ...al 11 2 11 Inverter compressor drive error diagnosis and solution Yes Replace the outdoor PCB Replace the inverter compressor Reconnect and retry No No Is the connection of compressor good Is the wiri...

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