Midea MO11M-09HN1 Service Manual Download Page 51

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DM12-01.01.09en

Oasis

On-off

Service manual

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

Summary of Contents for MO11M-09HN1

Page 1: ...1 OASIS On off SERIES Service Manual 2012 DM12 01 01 09en MS11M 09HRN1 MO11M 09HN1 MS11M 12HRN1 MO11M 12HN1 MS11M 18HRN1 MO11M 18HN1 MS11M 24HRN1 MO11M 24HN1...

Page 2: ...tion 24 8 2 Connecting the cables 24 8 3 Pipe length and the elevation 25 8 4 Installation for the first time 26 8 5 Adding the refrigerant after running the system for many years 29 8 6 Re installati...

Page 3: ...t 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 Th...

Page 4: ...ere 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 al...

Page 5: ...re 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 CAUT...

Page 6: ...ts 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 dam...

Page 7: ...2HN1 18k MS11M 18HRN1 MO11M 18HN1 24k MS11M 24HRN1 MO11M 24HN1 Indoor unit Filter Killer of Formaldehyde Plasma Silver Ion Filter Self Clean Follow Me Auto restart Sleep mode Horizontal Swing Function...

Page 8: ...current RLA A 3 85 3 73 5 37 5 39 Locked rotor Amp LRA A 21 7 20 1 Thermal protector B160 135 241E Thermal protector position EXTERNAL INTERNAL Capacitor uF 25 35 Refrigerant oil oil charge ml ESTER O...

Page 9: ...h mm 750x507x23 2 754x504x26 74 g Number of circuits 6 4 Outdoor air flow m3 h 1800 1900 Outdoor noise level dB A 54 55 Outdoor unit Dimension W D H mm 780x250x540 780x250x540 Packing W D H mm 910x335...

Page 10: ...15 Locked rotor Amp LRA A 31 8 60 Thermal protector Thermal protector position INTERNAL INTERNAL Capacitor uF 45 60 Refrigerant oil oil charge ml ESTER OIL VG74 750cc ESTER OIL VG74 850 CC Indoor fan...

Page 11: ...651x26 74 785x651x26 74 g Number of circuits 4 4 Outdoor air flow m3 h 2500 2700 Outdoor noise level dB A 57 60 Outdoor unit Dimension W D H mm 845x320x700 845x320x700 Packing W D H mm 965x395x755 965...

Page 12: ...Oasis On off DM12 01 01 09en 12 Service manual 4 Dimension 4 1 Indoor Unit Model W D H MS11M 09HRN1 750 198 280 MS11M 12HRN1 835 198 280 MS11M 18HRN1 990 218 315 MS11M 24HRN1 1186 258 340...

Page 13: ...mm H mm Dimension of installation hole mm MS11M 09HRN1 180 110 45 65 MS11M 12HRN1 140 110 45 Model L mm R mm H mm Dimension of installation hole mm MS11M 18HRN1 260 134 6 45 65 Model L mm R mm H mm D...

Page 14: ...ual 4 2 Outdoor Unit 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 MO11M 09HN1 780 250 540 843 549 276 MO11M 12HN1 MO11...

Page 15: ...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 Heatin...

Page 16: ...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 Heating...

Page 17: ...5 28 4 91 27 19 C DB WB SC 4 26 4 22 4 19 4 12 4 03 Input 2 70 2 89 3 05 3 21 3 37 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 2 89 3 02 3 15 3 37 3 50 Heating Heating...

Page 18: ...7 03 6 54 27 19 C DB WB SC 5 67 5 62 5 58 5 48 5 36 Input 2 52 2 70 2 85 3 00 3 15 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 70 2 82 2 94 3 15 3 27 Heating Heating...

Page 19: ...rigerant 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 V...

Page 20: ...Oasis On off DM12 01 01 09en 20 Service manual 7 Wiring Diagram 7 1 Indoor Unit MS11M 09HRN1 MS11M 12HRN1 MS11M 18HRN1...

Page 21: ...DM12 01 01 09en Oasis On off Service manual 21 MS11M 24HRN1...

Page 22: ...Oasis On off DM12 01 01 09en 22 Service manual 7 2 Outdoor Unit MO11M 09HN1 MO11M 12HN1 MO11M 18HN1...

Page 23: ...DM12 01 01 09en Oasis On off Service manual 23 MO11M 24HN1...

Page 24: ...m 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 25: ...refrigerant g m Gas Liquid MS11M 09HRN1 MO11M 09HN1 3 8 9 53 1 4 6 35 5 8 20 20 MS11M 12HRN1 MO11M 12HN1 1 2 12 7 1 4 6 35 5 8 20 20 MS11M 18HRN1 MO11M 18HN1 5 10 25 20 MS11M 24HRN1 MO11M 24HN1 5 8 16...

Page 26: ...it connections by a soft brush to check for leakage 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...

Page 27: ...splay in the pressure indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the c...

Page 28: ...e 3 Adding the refrigerant if the pipe length 5m 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 fr...

Page 29: ...y years Procedure 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...

Page 30: ...6 Re installation while the indoor unit need to be repaired 1 Collecting the refrigerant into the outdoor unit Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position R...

Page 31: ...leakage 2 Air purging by the refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port o...

Page 32: ...use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for the whole system...

Page 33: ...nto 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 re...

Page 34: ...Oasis On off DM12 01 01 09en 34 Service manual Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage...

Page 35: ...dels 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 2 The room relative humidi...

Page 36: ...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 c...

Page 37: ...han 300RPM lasting 2 minutes the unit stops and LED displays failure information and can t returns to normal operation automatically 10 3 5 Current protection I3SEC I5MIN A B C Resume IFAN IRESTORE A...

Page 38: ...e set to high med low auto 4 The louver operates the same as in cooling mode 5 Auto fan 29 28 High Low 25 Medium 10 4 2 Cooling Mode 10 4 2 1 Compressor running rules Once the compressor starts up it...

Page 39: ...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 The auto fan 10 4 2 4 Low evaporator coil temperature T2 protec...

Page 40: ...units have single fan speed The outdoor fan will run following the compressor except when AC is in evaporator high temp protection in heating mode condenser high temp protection in cooling mode defros...

Page 41: ...o fan action When T1 Ts 2 C the indoor fan will run at low speed When T1 Ts 0 C the indoor fan will run at medium speed 10 4 3 4 Defrosting mode For the models except 24k model Condition of defrosting...

Page 42: ...90 minutes which the AC is in evaporator high temperature protection mode and the outdoor fan stopped while the compressor keep working Defrosting time condition runtime minute Defrosting time minute...

Page 43: ...1M 09HN1 7 5 MS11M 12HRN1 MO11M 12HN1 MS11M 18HRN1 MO11M 18HN1 6 0 Condition of ending defrosting If one of following conditions is satisfied the AC will end the defrosting mode and turn into heating...

Page 44: ...sfied 1 If the compressor keeps running over 45 minutes Meanwhile T3 TC3 for 5minutes 2 After the last defrosting the time that the outdoor fan is off but the compressor is on in high T2 protection cu...

Page 45: ...e manual 45 Defrosting action While TC2 TC3 DT1 min DF s 20 3 6 55 10 4 3 5 High evaporator coil temp T2 protection Model TE7 TE8 TE9 MS11M 09HRN1 MO11M 09HN1 60 53 50 MS11M 12HRN1 MO11M 12HN1 63 53 5...

Page 46: ...o mode when the timer on function is active 3 After setting the mode AC will run in auto mode if the compressor keeps not running for 20 minutes 10 4 5 Drying mode 10 4 5 1 The compressor is cycled ru...

Page 47: ...urn off automatically when reaching the setting off time and then turn on automatically when reaching the setting on time 10 4 7 6 The timer function will not change the AC current operation mode Supp...

Page 48: ...ndicates the follow me function is initiated But when the indoor PCB receives signal which sent from remote controller every 3 minutes the buzzer will not respond When the unit is running with follow...

Page 49: ...en starting the unit again after shutting down its louver will restore to the angle originally set by the user but the precondition is that the angle must be within the allowable range if it exceeds i...

Page 50: ...ror 3 times X E3 Indoor fan speed has been out of control 5 times X E5 Open circuit or short circuit of indoor room temperature sensor 6 times X E6 Open circuit or short circuit of evaporator coil tem...

Page 51: ...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 N...

Page 52: ...rol 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 53: ...53 11 2 4 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 54: ...comes out again Yes Replace the T2 sensor and check if the errors happen again Is there any leakage Especially the connection parts such as the gas valve and the liquid valve Is there cool air blowin...

Page 55: ...er 3 minutes Change the outdoor PCB Yes 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 foll...

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