Midea MSV1I-09HRDN1 Technical & Service Manual
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Midea MSV1I-09HRDN1 Technical & Service Manual

Midea r410a vertu inverter multi series
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GD Midea Refrigeration Equipment Co.,Ltd
MULTI SPLIT TYPE, HEAT PUMP AIR CONDITIONERS
Technical service manual 2006
Indoor Models
Outdoor Models
Downloaded from AC-Manual.com Manuals
R410A Vertu Inverter multi Series
MSV1I-09HRDN1
MSV1I-12HRDN1
M2OA-18HRIN1
M40A-27HRIN1
1

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Summary of Contents for Midea MSV1I-09HRDN1

  • Page 1 GD Midea Refrigeration Equipment Co.,Ltd MULTI SPLIT TYPE, HEAT PUMP AIR CONDITIONERS Technical service manual 2006 R410A Vertu Inverter multi Series Indoor Models MSV1I-09HRDN1 MSV1I-12HRDN1 Outdoor Models M2OA-18HRIN1 M3OA-27HRIN1 M40A-27HRIN1 Downloaded from AC-Manual.com Manuals...
  • Page 2 1. Product features 2. Dimensions 3. Refrigeration cycle diagram 4. Operation temperature limits 5. Indoor units combination 6. Wiring diagram 7. Wiring connection 8. Electric control functions 9. Troubleshooting Annex 1 Characteristic of temp. sensor Annex 2 Reference data Downloaded from AC-Manual.com Manuals...
  • Page 3 Product Features 1.1 Powerful at cooling/heating. 1.2 Low voltage start-up function. 1.3 Anti-icing function at cooling mode. 1.4 Anti-cold air function at heating mode. 1.5 Auto-defrosting. 1.6 Outdoor electric current protection 1.7 Temperature protection of the outdoor compressor top. 1.8 Error self diagnosis function. 1.9 Free connection between indoor and outdoor unit Downloaded from AC-Manual.com Manuals...
  • Page 4 2 Dimensions 2.1 Indoor unit Dimension Mode 2.2 Outdoor unit a) Outdoor unit M2OA-18HRIN1& M3OA-27HRIN1 Downloaded from AC-Manual.com Manuals...
  • Page 5 b) Outdoor unit M4OA-27HRIN1 Downloaded from AC-Manual.com Manuals...

  • Page 6: Refrigeration Cycle Diagram

    3 Refrigeration Cycle Diagram 3.1 Refrigeration circuit drawing of inverter quadplex type Capillary A EXV A Liquid valve A Axial flow fan Filter A Auxiliary Capillary Capillary B EXV B Liquid valve B Exhaust Main temp. sensor Capillary Filter B Capillary C EXV C Liquid valve C...

  • Page 7: Cooling Mode

    3.2 Refrigeration circuit drawing of inverter binary type Axial flow fan EXVA Auxiliary Liquid valve A Filter A Capillary Exhaust Main Capillary A temp. sensor Capillary EXVB Check Liquid valve B Filter B Condenser Coil temp. Valve sensor Capillary B 4-way valve Indoor pipe out...
  • Page 8 5 Indoor units combination 5.1 M2OA-18HRIN1 Indoor units can be combined by 7000Btu/h 9000 Btu/h 12000Btu/h 7000Btu/h+9000 Btu/h 7000Btu/h+12000Btu/h 9000Btu/h+9000 Btu/h 9000Btu/h+12000Btu/h 12000Btu/h+12000Btu/h 12000Btu/h+18000Btu/h 9000Btu/h+18000Btu/h 7000Btu/h+18000Btu/h 5.2 M3OA-27HRIN1 Indoor units can be combined by 7000Btu/h 9000 Btu/h 12000Btu/h 7000Btu/h+9000 Btu/h 7000Btu/h+12000Btu/h 9000Btu/h+9000 Btu/h 9000Btu/h+12000Btu/h...
  • Page 9 7000Btu/h+9000 Btu/h 7000Btu/h+12000Btu/h 9000Btu/h+9000 Btu/h 9000Btu/h+12000Btu/h 12000Btu/h+12000Btu/h 12000Btu/h+18000Btu/h 9000Btu/h+18000Btu/h 7000Btu/h+18000Btu/h 7000Btu/h*2+9000 Btu/h 7000Btu/h*2+12000 Btu/h 7000Btu/h*2+18000 Btu/h 7000Btu/h*3 9000Btu/h*2+7000 Btu/h 9000Btu/h*2+12000 Btu/h 9000Btu/h*2+18000 Btu/h 9000Btu/h*3 12000Btu/h*2+7000 Btu/h 12000Btu/h*2+9000 Btu/h 12000Btu/h*3 7000Btu/h+9000Btu/h+12000Btu/h 7000Btu/h+9000Btu/h+18000Btu/h 9000Btu/h+9000Btu/h+18000Btu/h 7000Btu/h+12000Btu/h+18000Btu/h 9000Btu/h+12000Btu/h+18000Btu/h 7000Btu/h*2+9000 Btu/h*2 7000Btu/h*2+9000 Btu/h+12000 Btu/h 7000Btu/h*3+9000 Btu/h 7000Btu/h*3+12000 Btu/h 7000Btu/h*3+18000 Btu/h 7000Btu/h*4...
  • Page 10 6. Wiring Diagram 6.1 Indoor unit 6.2 Outdoor unit M2OA-18HRIN1 Downloaded from AC-Manual.com Manuals...
  • Page 11 6.3 Outdoor unit M3OA-27HRIN1 Downloaded from AC-Manual.com Manuals...
  • Page 12 Outdoor unit M4OA-27HRIN1 Downloaded from AC-Manual.com Manuals...
  • Page 13 7 Wire connection 7.1 Connection wire specification Standard Cores Thickness( Wire cover length(mm) specification Connection wire between indoor Neoprene 6000 unit and outdoor (L,N,S,Grounding) YZW300/500V unit Remark: The connection wire between indoor unit and outdoor unit is standard. And it is packaged in the indoor unit.
  • Page 14 8 Electronic control function 8.1 Protection 1. 3 minutes delay at restart for compressor. 2. Temperature protection of compressor top, compressor stops when the temp. of top of compressor is more than 120 , compressor runs when the temp. of top of compressor is less than 105 .
  • Page 15 Evaporator Temp. Compressor T< 4 T > 8 8.2.2 Dehumidifying mode 1.The indoor fan is fixed in low speed 2. Low room temperature protection: When room temperature decreases to below 10 , indoor fan stop, when room temperature restores to over 12 , indoor fan start. 3.
  • Page 16 Indoor evaporator high-temperature protection at heating mode Condition Compressor T= Indoor exchanger temp. T<48 53 <T<63 Decrease frequency of compressor T>63 8.2.4 Defrost operation 1. Defrosting condition: The temperature of outdoor heat exchanger remains consecutively lower than -2°c for more than 40 minutes, 2.
  • Page 17 change to stand by. The outdoor unit will work in heating mode. • In case of one Indoor unit working in heating mode, and another indoor unit is set to cooling mode or fan mode, the indoor unit setting to cooling mode or fan mode will change to stand by.
  • Page 18 8.7 Auto restart function In case of a sudden power failure, this function automatically sets the unit to previous settings before the power failure when power returns. 8.8 Capacity test frequency locked. When test the cooling capacity, the frequency can be locked at Rated Frequency by following the below: 1.
  • Page 19 Displays the malfunction code or protection code. 8.9.9 FAN SPEED indication lamp Displays the selected fan speed: AUTO(nothing) and three fan speed levels: LOW, MED and HIGH. 8.10 Outdoor unit LED display function: 1. When stand-by it display number of indoor unit online; 2.
  • Page 20 8.12 Outdoor fan speed control There is one fan with two-speed, the fan speed is controlled according ambient temp. After the compressor stop, 30 seconds later the fan stops. When cooling: > 27 High speed Ambient temp.rise <27 Low speed Ambient >25 High speed...
  • Page 21 9 Troubleshooting for outdoor unit 9.1 Safety Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down the power supply, electricity power still are kept in capacitors, do not forget to discharge the electricity power in capacitor. The value of resistance is about 1500 ohm to 2000 ohm Resistanc The voltage in P3 and P4 in outdoor PCB is high voltage about 310V...
  • Page 22 9.2 LED error code display for indoor unit Display LED STATUS EEPROM error Indoor and outdoor unit communication error Zero-crossing examination error Fan speed beyond control Outdoor units temp. sensor or connector of temp. sensor is defective Indoor units temp. sensor or connector of temp. sensor is defective Inverter module protection Outdoor unit voltage protection Compressor top temperature protection...

  • Page 23: Trouble Shooting

    9.3 Trouble shooting Display LED STATUS EEPROM error Temporarily turn off the power supply and turn it on again after 1 minute Does the trouble occur again? Replace the indoor PCB Downloaded from AC-Manual.com Manuals...
  • Page 24 Display LED STATUS No 1 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective Is connection to connector of pipe temp. sensor good? Repair connector Check the resistance of the temp. sensor according to Annex 1 Replace the sensor Display LED STATUS...
  • Page 25 Display LED STATUS Outdoor units temp. sensor or connector of temp. sensor is defective Is connection to connector of pipe temp. sensor good? Repair connector Check the resistance of the temp. sensor according to Annex 1 Replace the sensor Display LED STATUS Compressor voltage protection Check the voltage of power supply, if the voltage is about 220V, turn off the...
  • Page 26 Display LED STATUS Indoor / outdoor units communication protection Is the LED in outdoor main PCB light? Check the signal wires between outdoor PCB’s, is it connected good. 1.Is the +5 voltage in outdoor main board? Power Board: CN1, Red wire and yellow (GND) Outdoor main PCB: CZ1 2.Is the +12 voltage in outdoor main board? Power Board: CN1, Purple wire and yellow (GND)
  • Page 27 Display LED STATUS Compressor top protection against temperature Off: 120 ; On: 105 Does compressor operate? Is protector on the top of compressor Is refrigerant circulation volume normal? normal? Normally the resistance of the protector is 0 ohm. Gas charging Replace protector Is abnormality the same after gas charging? Check the outdoor main PCB.
  • Page 28 Display LED STATUS Compressor current protection Check the resistance of compressor, normally U and V is 0.6 ohm U and W is 0.6 ohm V and W is 0.6 ohm The compressor is defective Turn one indoor unit only, Does the compressor start after 3 minutes? The compressor is defective Does the trouble occur again after compressor...
  • Page 29 Display LED STATUS Inverter module protection Check the connectors CN12, CN7, CN1 in outdoor PCBs Is connection to connector good? Are the wires to compressor right? Repair connector Check the outdoor inverter module. Is it breakdown between P-N,P-U,P-V;N-W,N-U,N-V At inverter module Normally, P-N: ~1.0MΏ...
  • Page 30 Display LED STATUS Outdoor low temp. protection This is optional, factory standard unit does not have this function. Unit stops when outdoor temp. is lower than -15°C and lasting time more than 60 minutes, and unit runs again when outdoor temp. more than -12°C. Is the outdoor temp.
  • Page 31 Annex 1 Characteristic of temp. sensor Temp. Resistance KΩ Temp. Resistance KΩ Temp. Resistance KΩ 62.2756 14.6181 4.3874 58.7079 13.918 4.2126 56.3694 13.2631 4.0459 52.2438 12.6431 3.8867 49.3161 12.0561 3.7348 46.5725 11.5 3.5896 10.9731 3.451 41.5878 10.4736 3.3185 39.8239 3.1918 37.1988 9.5507 3.0707...
  • Page 32 Annex 2 1. Reference voltage data: a) Rectifier : Input :220-230V(AC), output :310V(DC) Normally In power board: P3 and P4: 310V(DC) P5 and P6: 310V(DC) b) Inverter module: U,V, W 3ph. Result 60-150V(AC) 60-150V(AC) 60-150V(AC) DC 310V c) Photo-couple PC817, PC851: Control side <+5V, AC side :< 24V(AC) d) S terminal and N: changeable from 0-24V 2.

This manual is also suitable for:

Msv1i-12hrdn1M2oa-18hrin1M3oa-27hrin1M40a-27hrin1

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