Midea MSC-09HRDN1-QD0(E) Service Manual Download Page 3 | Manualshive

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10. Troubleshooting ....................................................................................................................................... 35

10.1 Indoor Unit Error Display ................................................................................................................................. 35

10.2 Diagnosis and Solution .................................................................................................................................... 35

11. Characteristic of temp. sensor ............................................................................................................... 39

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Summary of Contents for MSC-09HRDN1-QD0(E)

Page 1: ...SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED TYPE MSC 09HRDN1 QD0 E MSC 12HRDN1 QC6 E MSH 09HRDN1 QD0 E MSH 12HRDN1 QC6 E V1 0 Dec 2006...

Page 2: ...n 14 7 6 Re air purging Re installation 15 7 7 Balance refrigerant of the 2 way 3 way valves 16 7 8 Evacuation 17 7 9 Gas charging 18 8 Operation characteristics 19 8 1 MSC 09HRDN1 QD0 E 19 8 2 MSC 12...

Page 3: ...10 Troubleshooting 35 10 1 Indoor Unit Error Display 35 10 2 Diagnosis and Solution 35 11 Characteristic of temp sensor 39...

Page 4: ...mage to the product Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury...

Page 5: ...ient operation Operational Do not expose the skin directly to cool air for long periods of time Do not sit in the draft This could harm to your health Do not use the product for special purposes such...

Page 6: ...ion according to operation mode Turbo wind high med low breeze Restarting is for approx 3 minutes Prevent the water being freezed on evaporator by sensing the evaporator pipe temperature in cooling mo...

Page 7: ...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 8: ...5 3 Dimension 3 1 Indoor Unit MSC 09HRDN1 QD0 E MSC 12HRDN1 QC6 E MSH 09HRDN1 QD0 E MSH 12HRDN1 QC6 E...

Page 9: ...6 3 2 Outdoor Unit MOC 09HDN1 QD0 E MOC 12HDN1 QC6 E...

Page 10: ...rotector CS 74 CS 74 Capacitor uF No No Refrigerant oil ml 480 480 Indoor fan motor Model RPG20D RPG20D Brand Welling Welling Input W 38 38 Capacitor uF 1 5 1 5 Speed hi mi lo r min 1150 1000 800 1250...

Page 11: ...80 480 Indoor fan motor Model RPG20D RPG20D Brand Welling Welling Input W 38 38 Capacitor uF 1 5 1 5 Speed hi mi lo r min 1150 1000 800 1250 1060 800 Indoor air flow Hi Mi Lo m3 h 650 515 375 675 520...

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

Page 13: ...10 6 Wiring diagram 6 1 Indoor Unit MSC 09HRDN1 QD0 E MSC 12HRDN1 QC6 E MSH 09HRDN1 QD0 E MSH 12HRDN1 QC6 E...

Page 14: ...11 6 2 Outdoor Unit MOC 09HDN1 QD0 E MOC 12HDN1 QC6 E...

Page 15: ...t Grade Unit 7K 9K 12K mm 2 1 0 1 0 1 5 7 3 Pipe length and the elevation Capacity Btu h Pipe size Standard length m Max Elevation B m Max Elevation B m Additional refrigerant g m Gas Liquid 7k 12K 3...

Page 16: ...flare connection for gas leakage 4 Purge the air from the system Set the 2 way valve to the open position and remove the cap from the 3 way valve s service port Using the hexagonal wrench to press the...

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: ...tes 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 refriger...

Page 19: ...ice 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 con...

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: ...oling Power Input KW Remark Indoor room temperature 20 Outdoor temperature 7 6 Indoor fan speed High 15 2 3 Cooling Capacity KW Cooling Characteristics Outdoor Ambient Temperature 2 56 2 50 2 38 2 44...

Page 23: ...08 0 84 0 88 0 92 Remark Indoor room temperature 27 19 Indoor fan speed High Pipe length 5m Cooling Capacity KW Piping Lenth Characteristics Cooling Piping Length m 3 32 3 26 3 14 3 20 3 38 3 44 3 50...

Page 24: ...put KW Remark Indoor room temperature 20 Outdoor temperature 7 6 Indoor fan speed High 15 2 3 Cooling Capacity KW Cooling Power Input KW Cooling Characteristics Outdoor Ambient Temperature 2 56 2 50 2...

Page 25: ...97 0 91 0 92 0 93 Cooling Power Input KW Remark Indoor room temperature 27 19 Outdoor temperature 35 Indoor fan speed High 15 Cooling Capacity KW Heating Characteristics Outdoor Ambient Temperature 3...

Page 26: ...r For Cooling Heating models only This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode TEMPERATURE indi...

Page 27: ...300RPM for 60 seconds the unit stops and LED displays failure information and can t return to normal operation automatically 9 3 8 Cross Zero signal error warning If there are 20 alternations of Cross...

Page 28: ...iz the target start frequency is Fmax and within 7 minutes frequency limit caused by the difference between room temperature and setting temperature is disabled During this period frequency limit and...

Page 29: ...then press TURBO button on controller 6 times or more within 10 seconds make sure indoor unit receives these signals the machine will turn into rating capacity test mode the buzzer will make a di sou...

Page 30: ...l T3 52 9 6 Drying mode 9 6 1 In this mode for the action of 4 way valve please refer the passage 9 10 9 6 2 Indoor fan speed is fixed at breeze grade and can t be changed The horizontal angle is the...

Page 31: ...room temperature meeting setting value and then resarts the start frequency of compressor is set as follow and without 7 minutes limit 9 7 6 After start the operation frequency of compressor submits t...

Page 32: ...ng Condition 1 If T4 0 When the units are running if the following two items are satisfied the units start defrosting a The units runs with T3 3 for 40 minutes and T3 keeps lower than TCDI for more th...

Page 33: ...hine has run for 10 minutes in defrosting 9 7 10 Defrosting action 9 7 11 Rating capacity test function 1 Set the indoor unit with remote controller as high fan 30 in heating mode then press TURBO but...

Page 34: ...ode can be chosen with remote controller and the setting temperature can be changed between 17 30 In auto mode the machine will choose cooling heating or fan only mode according to T T T1 Ts T T1 Ts R...

Page 35: ...automatically when reaching the setting off time and then turn on automatically when reaching the setting on time 9 12 6 The tolerance of timer is 1 minute per hour 9 13 Sleep function mode 9 13 1 Ope...

Page 36: ...q Limit in 4 5 5 2 22 I2COOL Protection Current of Freq Limit in 5 5 6 4 23 I3COOL Protection Current of Stopping in Cooling A 6 5 7 5 24 I1HEAT Current of Releasing Freq Limit in 5 2 5 2 25 I2HEAT Pr...

Page 37: ...2 22 I2COOL Protection Current of Freq Limit in 5 5 6 4 23 I3COOL Protection Current of Stopping in Cooling A 6 5 7 5 24 I1HEAT Current of Releasing Freq Limit in 5 2 5 2 25 I2HEAT Protection Current...

Page 38: ...circuit of room or evaporator temperature sensor P0 IGBT over strong current protection P1 Over voltage or too low voltage protection P2 Temperature protection of compressor top P4 Inverter compresso...

Page 39: ...od 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 power supply for outdoor...

Page 40: ...essor 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 again NO YES Replace the indoor PCB...

Page 41: ...nce 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 o...

Page 42: ...1918 1 37 1988 26 9 5507 53 3 0707 0 35 2024 27 9 1245 54 2 959 1 33 3269 28 8 7198 55 2 8442 2 31 5635 29 8 3357 56 2 7382 3 29 9058 30 7 9708 57 2 6368 4 28 3459 31 7 6241 58 2 5397 5 26 8778 32 7 2...

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