Midea MSMBA-07HRN1 Service Manual
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Midea MSMBA-07HRN1 Service Manual

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Библиотека СОК 
1
Mission ON-OFF SERIES
Service Manual 2016
MSMBA-07HRN1(W) / MOAB01-07HN1
MSMBA-09HRN1(W) / MOAB01-09HN1
MSMBB-12HRN1(W) / MOBA02-12HN1
MSMBC-19HRN1(W) / MOBA02-18HN1
MSMBD-24HRN1(W) / MOCA01-24HN1
DM16-01.01.21en
Service manual

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Summary of Contents for Midea MSMBA-07HRN1

  • Page 1 Библиотека СОК  DM16-01.01.21en Mission ON-OFF SERIES Service Manual 2016 MSMBA-07HRN1(W) / MOAB01-07HN1 MSMBA-09HRN1(W) / MOAB01-09HN1 MSMBB-12HRN1(W) / MOBA02-12HN1 MSMBC-19HRN1(W) / MOBA02-18HN1 MSMBD-24HRN1(W) / MOCA01-24HN1 Service manual...

  • Page 2: Table Of Contents

    Mission On-off DM16-01.01.21en CONTENTS   1. Precaution ..............................3 1.1 Safety Precaution ........................3   1.2 Warning ............................3     2. Function ................................ 6   3. Specification ..............................7   4. Dimension ..............................11 4.1 Indoor Unit ..........................11   4.2 Outdoor Unit ..........................

  • Page 3: Precaution

    DM16-01.01.21en Mission On-off 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 Mission On-off DM16-01.01.21en There 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. ...
  • Page 5 DM16-01.01.21en Mission On-off  Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation. ...

  • Page 6: Function

    Mission On-off DM16-01.01.21en 2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units MSMBA-07HRN1(W) MOAB01-07HN1 MSMBA-09HRN1(W) MOAB01-09HN1 On-Off MSMBB-12HRN1(W) MOBA02-12HN1 MSMBC-19HRN1(W) MOBA02-18HN1 MSMBD-24HRN1(W) MOCA01-24HN1 Service manual...

  • Page 7: Specification

    DM16-01.01.21en Mission On-off 3. Specification Indoor model name MSMBA-07HRN1(W) MSMBA-09HRN1(W) MSMBB-12HRN1(W) Outdoor model name MOAB01-07HN1 MOBA02-12HN1 MOBA02-12HN1 Power supply Ph-V-Hz 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph Btu/h 7500 9000 12000 Capacity 2.20 2.64 3.52 Cooling Input 1096...
  • Page 8 Mission On-off DM16-01.01.21en Indoor air flow (Hi/Mi/Lo) m3/h 450/371/264 450/371/264 520/440/270 Indoor noise level (Hi/Mi/Lo) dB(A) 36/31/26 35/31/29 37/31/25 Dimension(W*D*H) 730x198x293 730x198x293 810x200x300 Indoor unit Packing (W*D*H) 810x285x375 810x285x375 890x285x385 Net/Gross weight 7.7/10.2 7.7/10.2 8.9/11.9 Model YKT-32-6-203L YKT-32-6-203L YKT-32-6-203L Input 72.5/67 72.5/67 72.5/67...
  • Page 9 DM16-01.01.21en Mission On-off Indoor model name MSMBC-19HRN1(W) MSMBD-24HRN1(W) Outdoor model name MOBA02-18HN1 MOCA01-24HN1 Power supply Ph-V-Hz 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph Btu/h 19000 24000 Capacity 5.57 7.03 Cooling Input 1735 2503 Rated current 10.9 3,21 2,81 Btu/h 19000 26000 Capacity 5.57 7.62...
  • Page 10 Mission On-off DM16-01.01.21en Input 93/81 Capacitor Speed (HI) r/min 880/820 a.Number of rows b.Tube pitch(a)x row pitch(b) 21x13.37 21x13.37 c.Fin spacing Outdoor coil d.Fin type (code) Hydrophilic aluminium Hydrophilic aluminium e.Tube outside dia.and type Φ7,innergroove tube Φ7,innergroove tube f.Coil length x height x width 755x504x26.74 760x651x26.74 g.Number of circuits...

  • Page 11: Dimension

    DM16-01.01.21en Mission On-off 4. Dimension 4.1 Indoor Unit Model MSMBA-07HRN1(W) MSMBA-09HRN1(W) MSMBB-12HRN1(W) MSMBC-19HRN1(W) MSMBD-24HRN1(W) 1090 Service manual...
  • Page 12 Mission On-off DM16-01.01.21en For MSMBA-07HRN1(W), MSMBA-09HRN1(W)， Service manual...
  • Page 13 DM16-01.01.21en Mission On-off For MSMBB-12HRN1(W)， For MSMBC-19HRN1(W), Service manual...
  • Page 14 Mission On-off DM16-01.01.21en For MSMBD-24HRN1(W), Service manual...

  • Page 15: Outdoor Unit

    DM16-01.01.21en Mission On-off 4.2 Outdoor Unit More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 200cm Service manual...
  • Page 16 Mission On-off DM16-01.01.21en For MOAB01-07HN1, MOAB01-09HN1, Service manual...
  • Page 17 DM16-01.01.21en Mission On-off For MOBA02-12HN1, MOBA02-18HN1， 779 W3 487 W1 300 D 770 W 70 W2 25 B1 61.5 A2 12 A1 Service manual...
  • Page 18 Mission On-off DM16-01.01.21en For MOCA01-24HN1, Service manual...

  • Page 19: Capacity Tables

    DM16-01.01.21en Mission On-off 5. Capacity tables MSMBA-07HRN1(W) / MOAB01-07HN1 Cooling COOLING  OUTDOOR TEMPERATURE DRY  21ºC  25ºC  30ºC  35ºC  40ºC  45ºC  Indoor Conditions  21ºC D  Total capacity kW  15ºC W  1,90    1,88    1,86    1,82    1,46    1,37       Sensitive capacity kW  1,52    1,50   ...
  • Page 20 Mission On-off DM16-01.01.21en MSMBA-09HRN1(W) / MOAB01-09HN1 Cooling COOLING  OUTDOOR TEMPERATURE DRY  21ºC  25ºC  30ºC  35ºC  40ºC  45ºC  Indoor Conditions  Total capacity kW  2,44    2,42    2,40    2,35    1,88    1,76    21ºC D  Sensitive capacity kW  1,95    1,94    1,92    1,88    1,50    1,41 ...
  • Page 21 DM16-01.01.21en Mission On-off MSMBB-12HRN1(W) / MOBA02-12HN1 Cooling COOLING  OUTDOOR TEMPERATURE DRY  21ºC  25ºC  30ºC  35ºC  40ºC  45ºC  Indoor Conditions  Total capacity kW  3,26    3,23    3,20    3,13    2,51    2,35    21ºC D  Sensitive capacity kW  2,61    2,58    2,56    2,51    2,00    1,88 ...
  • Page 22 Mission On-off DM16-01.01.21en MSMBC-19HRN1(W) / MOBA02-18HN1 Cooling COOLING  OUTDOOR TEMPERATURE DRY  21ºC  25ºC  30ºC  35ºC  40ºC  45ºC  Indoor Conditions  Total capacity kW  5,16    5,11    5,06    4,96    3,97    3,72    21ºC D  Sensitive capacity kW  4,12    4,08    4,05    3,97    3,17    2,97 ...
  • Page 23 DM16-01.01.21en Mission On-off MSMBD-24HRN1 / MOMBD-24HRN1 Cooling COOLING  OUTDOOR TEMPERATURE DRY  21ºC  25ºC  30ºC  35ºC  40ºC  45ºC  Indoor Conditions  Total capacity kW  6,51    6,44    6,38    6,26    5,01    4,69    21ºC D  Sensitive capacity kW  5,21    5,16    5,11    5,01    4,00    3,75 ...

  • Page 24: Refrigerant Cycle Diagram

    Mission On-off DM16-01.01.21en 6. 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...

  • Page 25: Installation Details

    DM16-01.01.21en Mission On-off 7. Installation Details 7.1 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) 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet.

  • Page 26: Pipe Length And The Elevation

    Max. Max. Additional Pipe size Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) 3/8’’ 1/4’’ MSMBA-07HRN1(W) / MOAB01-07HN1 (Ф9.52) (Ф6.35) 3/8’’ 1/4’’ MSMBA-09HRN1(W) / MOAB01-09HN1 (Ф9.52) (Ф6.35) 1/2’’ 1/4’’ MSMBB-12HRN1(W) / MOBA02-12HN1 (Ф12.7) (Ф6.35) 1/2’’ 1/4’’ MSMBC-19HRN1(W) / MOBA02-18HN1 (Ф12.7)

  • Page 27: Installation For The First Time

    DM16-01.01.21en Mission On-off 7.4 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 28 Mission On-off DM16-01.01.21en 2. Air purging by 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 of the 3-way valve. 3).

  • Page 29: Adding The Refrigerant After Running The System For Many Years

    DM16-01.01.21en Mission On-off Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant). 3) Put the charging cylinder onto the electronic scale and record the weight. 4) Operate the air conditioner at the cooling mode.

  • Page 30: Re-Installation While The Indoor Unit Need To Be Repaired

    Mission On-off DM16-01.01.21en 7.6 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 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.

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

    DM16-01.01.21en Mission On-off the 2-way valve approximately 45’ for 3 seconds then closing it for 1 minute; repeat 3 times. After purging the air, use a torque wrench to tighten the flare nut on the 2-way valve. 4). Check the gas leakage Check the flare connections for gas leakage.
  • Page 32 Mission On-off DM16-01.01.21en 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. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge. 2).

  • Page 33: Operation Characteristics

    DM16-01.01.21en Mission On-off 8. Operation Characteristics Mode Cooling operation Heating operation Drying operation Temperature 17℃~32℃ 0℃~30℃ 10℃~32℃  Room temperature 18℃~43℃ -7℃~24℃ 11℃~43℃ Outdoor temperature 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 34: Electronic Function

    Mission On-off DM16-01.01.21en 9. Electronic function 9.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 9.2 Display function 7.2.1 Icon explanation on indoor display board. Digital display: Displays the temperature settings when the air conditioner is operational.
  • Page 35 DM16-01.01.21en Mission On-off Dispalys ‘ ’ during self clean operation (if aplicable). Dispalys ‘ ’ under 8℃ heating operation. WIFI control display (WiFi kit is in standard) Displays when the WIFI control feature is activated. NOTE: A guide on using the infrared remote is not included in this literature package.. Service manual...

  • Page 36: Main Protection

    Mission On-off DM16-01.01.21en 9.3 Main Protection 7.3.1 Time Delay at restart for compressor. Less than 1 minute delay for the 1 time start-up and 3 minutes delay for others. 9.3.2 Sensor protection at open circuit and breaking disconnection. 9.3.3 Zero crossing detection error protection If AC cannot detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure.

  • Page 37: Operation Modes And Functions

    DM16-01.01.21en Mission On-off 9.4 Operation Modes and Functions 9.4.1 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 the same as in cooling mode. (5) Auto fan: High Medium...
  • Page 38 Mission On-off DM16-01.01.21en 9.4.2.3 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: T1-Ts High Medium 9.4.2.4 Low evaporator coil temperature T2 protection When the evaporator coil temp.T2 keeps lower than setting value, the compressor and outdoor fan will shut off.
  • Page 39 DM16-01.01.21en Mission On-off 9.4.2.5 High condenser temperature T3 protection (only for MSMBD-24HRN1-QB8W) Compressor Off Compressor On When high condenser temp. T3 is more than setting value, the compressor will stop. During the protection, the outdoor fan keeps working. 9.4.3 Heating Mode 9.4.3.1 Compressor running rules: When indoor room temp.T1 is higher than setting value the compressor and outdoor fan will shut off.
  • Page 40 Medium The indoor fan speed will adjust according to the value of T1-T 9.4.3.4 Defrosting mode： For MSMBA-07HRN1(W), MSMBA-09HRN1(W), MSMBB-12HRN1(W), MSMBC-19HRN1(W) models: AC will enter the defrosting mode according to the value of temp difference between T2 and T1, and also the compressor running time.
  • Page 41 DM16-01.01.21en Mission On-off 9.4.4 Auto-mode This mode can be chosen with remote controller. In auto mode, the machine will choose operation mode according to ∆T (∆T =T1-Ts). T1-Ts Cooling Fan only Heating* Heating*: For cooling only models, they will run at fan speed AC will run in auto mode in the below cases: Pressing the forced auto button.
  • Page 42 Mission On-off DM16-01.01.21en 9.4.8 Refrigerant Leakage Detection With this new technology, the display area will show “EC” when the outdoor unit detects refrigerant leakage. When compressor is active, the value of the Coil temperature of evaporator T2 has no change or very little change.

  • Page 43: Troubleshooting

    DM16-01.01.21en Mission On-off 10. Troubleshooting 10.1 Indoor Unit Error Display Operation lamp Timer lamp Display LED STATUS ☆ 1 time EEPROM parameter error ☆ 2 times Zero-crossing signal detection error ☆ 3 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or ☆...

  • Page 44: Diagnosis And Solution

    Mission On-off DM16-01.01.21en 10.2 Diagnosis and Solution 10.2.1 EEPROM parameter error diagnosis and solution(E1) 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 45 DM16-01.01.21en Mission On-off 10.2.2 Zero crossing detection error diagnosis and solution(E2) Error Code Malfunction decision When PCB does not receive zero crossing signal feedback for 4 conditions minutes or the zero crossing signal time interval is abnormal. Supposed causes Connection mistake ●...
  • Page 46 Mission On-off DM16-01.01.21en 10.2.3 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 47 DM16-01.01.21en Mission On-off Index1: 1: Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply)or 50V(115V power supply), the PCB must has problems and need to be replaced.
  • Page 48 Mission On-off DM16-01.01.21en 10.2.4 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) E5/E6/ E7 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 49 DM16-01.01.21en Mission On-off 10.2.5 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℃...
  • Page 50 Mission On-off DM16-01.01.21en 10.2.6 Indoor / outdoor unit’s communication diagnosis and solution(E9) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions seconds. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ● Trouble shooting: Service manual...
  • Page 51 DM16-01.01.21en Mission On-off 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 52 Mission On-off DM16-01.01.21en Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K) °C °F °C °F °C °F °C °F 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 11.5 2.19073 0.59386 96.3423 10.9731...
  • Page 53 DM16-01.01.21en Mission On-off Appendix 2 Temperature Sensor Resistance Value Table for T5 (°C --K) °C °F °C °F °C °F °C °F K Ohm K Ohm K Ohm K Ohm 542.7 68.66 13.59 3.702 511.9 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21...

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