Midea MSV1-09HRDN1-QC2, Service Manual

Page 1: ...SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED TYPE MSV1 09HRDN1 QC2 A MSV1 12HRDN1 QC2 A V1 2 Oct 2007...

Page 2: ...he cables 12 7 3 Pipe length and the elevation 12 7 4 Air purging of the piping and indoor unit 12 7 5 Pumping down Re installation 14 7 6 Re air purging Re installation 15 7 7 Balance refrigerant of...

Page 3: ...nel function 29 9 16 Ionizer Clean air function 29 9 17 Self clean function 29 9 18 Follow me function 29 9 19 Outdoor chassis heating cable function optional 30 10 Troubleshooting 31 10 1 Indoor Unit...

Page 4: ...a defective installation stand It may cause injury accident or damage to the product Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall wi...

Page 5: ...directly It may cause corrosion on the product Corrosion particularly on the condenser and evaporator fins could cause product malfunction or inefficient operation Operational Do not expose the skin d...

Page 6: ...3 your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked The chemical in batteries could cause burns or other health hazards...

Page 7: ...ction according to operation mode Turbo wind high med low breeze Restarting is for approx 3 minutes Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling m...

Page 8: ...ration mode Hydrophilic aluminum fin It is only operated in the heating operation mode except defrosting operation Anti rust cabinet Valve protection cover 4 way valve control Made from electrolytic z...

Page 9: ...6 3 Dimension 3 1 Indoor Unit MSV1 09HRDN1 QC2 A 795 165 270 MSV1 12HRDN1 QC2 A 285 845 165...

Page 10: ...7 3 2 Outdoor Unit MOC 09HDN1 QC2 MOC 12HDN1 QC2...

Page 11: ...0 480 Model RPG20D RPG20D Brand Welling Welling Input W 38 38 Capacitor uF 1 5 1 5 Indoor fan motor Speed hi mi lo r min 1150 1000 850 1250 1050 900 Indoor air flow Hi Mi Lo m3 h 570 480 350 700 520 4...

Page 12: ...9 5 Refrigerant cycle diagram...

Page 13: ...10 6 Wiring diagram 6 1 Indoor Unit MSV1 09HRDN1 QC2 A MSV1 12HRDN1 QC2 A...

Page 14: ...11 6 2 Outdoor Unit MOC 09HDN1 QC2 MOC 12HDN1 QC2...

Page 15: ...ength A m Additional refrigerant g m 9k 3 8 9 52 1 4 6 35 5 8 20 30 12k 1 2 12 7 1 4 6 35 5 8 20 30 Caution Capacity is base on standard length and maximum allowance length is base of reliability Oil...

Page 16: ...ench to press the valve core pin discharge for three seconds and then wait for one minute 5 Use torque wrench to tighten the service port cap to a torque of 1 8 kgf m 18n m 6 Set the 3 way valve to th...

Page 17: ...hose with the push pin to the gas service port 5 Air purging of the charge hose Open the low pressure valve on the charge set slightly to purge air from the charge hose 6 Set the 2 way valve to the cl...

Page 18: ...te repeat 3 times After purging the air use a torque wrench to tighten the flare nut to on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigera...

Page 19: ...ce port 3 Open the valves Low side on the charge set and discharge the refrigerant until the gauge indicates 0 05 to 0 1Mpa If there is no air in the refrigeration cycle the pressure when the air cond...

Page 20: ...ved toward 0 1 Mpa 76 cmHg vacuum of 4 mmHg or less 3 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after...

Page 21: ...fied amount of refrigerant if can be charged with a little at a time approximately 150g each time0 while operating the air conditioner in the cooling cycle however one time is not sufficient wait appr...

Page 22: ...6 0 77 0 78 0 79 0 73 0 74 0 75 Cooling Power Input KW Remark Indoor room temperature 27 19 Outdoor temperature 35 Indoor fan speed High 15 Cooling Capacity KW Cooling Characteristics Outdoor Ambient...

Page 23: ...th m 3 5 3 4 3 2 3 3 3 6 3 7 3 8 10 11 12 13 14 5 6 7 8 9 1 00 1 02 1 04 1 06 0 94 0 96 0 98 Heating Power Input KW Remark Indoor room temperature 20 Outdoor temperature 7 6 Indoor fan speed High 15 3...

Page 24: ...eshing and natural air PRE DEF indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode TURBO ind...

Page 25: ...e unit stops and LED displays failure information After resuming the motor rotates again The spacing of Cross Zero signal is 6 13ms 9 3 9 Indoor fan delayed open function 9 3 10 For all modes when the...

Page 26: ...ity test function 1 Set the indoor unit with remote controller as high fan 17 in cooling mode then press TURBO button on controller 6 times or more within 10 seconds make sure indoor unit receives the...

Page 27: ...top and not resume until room temperature climbs up to 12 9 6 3 Evaporator anti freezing protection condenser high temperature protection and outdoor unit frequency limit are valid and they are the sa...

Page 28: ...p or descend current frequency Zone H Compressor stops after running with F1 for 60 minutes or when Th 6 9 7 4 Outdoor unit current control in heating mode Remark I1HEAT I2 HEAT I3 HEAT 9K Model 5 5 A...

Page 29: ...es the machine will defrost no matter if T2 drops for more than 5 or not 2 Condition of ending defrosting If any one of following items is satisfied defrosting will finish and the machine will turn to...

Page 30: ...ine will rechoose running function 9 9 Forced operation function 9 9 1 Forced cooling and auto function can carry out with a touch button In these two modes the machine can be changed by remote contro...

Page 31: ...an is fixed as low speed 3 When heating the setting temperature descends 1 be lower than 30 every one hour 2 hour later the descending stops and indoor fan is fixed as low speed and anti cold wind is...

Page 32: ...it stops and turns into low fan mode and keeps running for 2 minutes then quits from Self Clean function and turns off 3 When setting the Self Clean function the unit has been in Timer or Turbo funct...

Page 33: ...ure sensor and setting temperature 9 19 Outdoor chassis heating cable function optional Heating cable is fixed on outdoor chassis to help deicing and to avoid freezing The heating cable s power is 85w...

Page 34: ...apacitors 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 Elect...

Page 35: ...l error E3 Fan speed out of control E5 Open or short circuit of outdoor temperature sensor E6 Open or short circuit of room or evaporator temperature sensor P0 IGBT over strong current protection P1 O...

Page 36: ...33 LED1 LED4 LED5 LED6...

Page 37: ...ection of L N S and GND good Is the GND connection on outdoor PCB good NO NO Reconnect and retest again Is the LED4 red on outdoor PCB bright and LED1 yellow blinking Replace outdoor e box Yes Yes The...

Page 38: ...re cleared NO YES Check the compressor NO Is the indoor temperature and evaporator sensor connector and connection good Repair the connector and reconnect Replace the sensor and check if E6 display ag...

Page 39: ...e of inverter compressor is it 0 71ohm YES Replace inverter compressor Reconnect and retry NO NO Is the power supply good Be sure the power supply is normal when using the units NO YES Replace the out...

Page 40: ...tor Model RPG20D Measure the resistance value of each winding by using the multi meter 10 3 4 Step Motor Model MP2835T Measure the resistance value of each winding by using the multi meter Position Re...

Page 41: ...sor Measure the resistance value of each winding by using the multi meter Some frequently used R T data for T1 T2 T3 and T4 sensor Temperature 5 10 15 20 25 30 40 50 60 Resistance Value K 26 9 20 7 16...