Midea MSC-09HRFN1-QD2E Service Manual Download Page 9 | Manualshive

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3. Dimension

3.1 Indoor Unit

MSC-09HRFN1-QD2E MSC-12HRFN1-QD2E

Model

W(mm)

H(mm)

D(mm)

MSC-09HRFN1-QD2E

790

265

195

MSC-12HRFN1-QD2E

920

292

225

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Summary of Contents for MSC-09HRFN1-QD2E

Page 1: ...SERVICE MANUAL MIDEA AIR CONDITIONER 3D DC INVERTER SPLIT WALL MOUNTED TYPE MSC 09HRFN1 QD2E MSC 12HRFN1 QD2E V1 1 May 2010...

Page 2: ...rging 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 09HRFN1 QD2E 19 8 2 MSC 12HRFN1 QD2E 20 9 Ele...

Page 3: ...9 18 Outdoor heating cable 32 10 Troubleshooting 33 10 1 Indoor Unit Error Display 35 10 2 Diagnosis and Solution 36 10 3 Key parts checking 39...

Page 4: ...r or an Authorized service center There is risk of fire electric shock explosion or injury n Do not install the product on a defective installation stand It may cause injury accident or damage to the...

Page 5: ...kage n Keep level even when installing the product To avoid vibration of water leakage n Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It m...

Page 6: ...ol with new ones of the same type Do not mix old and mew batteries or different types of batteries There is risk of fire or explosion n Do not recharge or disassemble the batteries Do not dispose of b...

Page 7: ...louver direction 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 i...

Page 8: ...ation 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 zi...

Page 9: ...6 3 Dimension 3 1 Indoor Unit MSC 09HRFN1 QD2E MSC 12HRFN1 QD2E Model W mm H mm D mm MSC 09HRFN1 QD2E 790 265 195 MSC 12HRFN1 QD2E 920 292 225...

Page 10: ...7 3 2 Outdoor Unit MOC1 09HFN1 QD2E MOF 12HFN1 QD2E...

Page 11: ...m3 h 600 500 380 630 520 400 Indoor noise level Hi Mi Lo dB A 39 32 25 43 34 26 Indoor unit Dimension W H D mm 790 265 198 920 292 225 Packing W H D mm 875 375 285 1015 368 295 Net Gross weight Kg 8...

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

Page 13: ...10 6 Wiring diagram 6 1 Indoor Unit MSC 09HRFN1 QD2E MSC 12HRFN1 QD2E...

Page 14: ...11 6 2 Outdoor Unit MOC1 09HFN1 QD2E MOF 12HFN1 QD2E...

Page 15: ...l refrigerant g m Gas Liquid 9k 3 8 9 52 1 4 6 35 5 8 20 20 12k 3 8 9 52 1 4 6 35 5 8 20 20 Caution Capacity is based on standard length and maximum allowance length is base of reliability Oil trap sh...

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: ...0 58 0 60 0 62 0 64 0 52 0 54 0 56 Cooling Power Input KW Remark Indoor room temperature 27 19 Outdoor temperature 35 Indoor fan speed High 15 Cooling Capacity KW Cooling Characteristics Outdoor Ambie...

Page 23: ...m 3 6 3 5 3 3 3 4 3 7 3 8 3 9 10 11 12 13 14 5 6 7 8 9 0 84 0 86 0 88 0 90 0 78 0 80 0 82 Heating Power Input KW Remark Indoor room temperature 20 Outdoor temperature 7 6 Indoor fan speed High 15 Coo...

Page 24: ...ure when the air conditioner is in FAN only operation and the range of that is 0 50 It will also display the codes when malfunction or protection happen Frequency indicator This indicator appears only...

Page 25: ...ion of louver 9 3 9 EEPROM parameter error 9 3 10 Communication error between indoor and outdoor units When outdoor unit doesn t receive communication signal from indoor unit for 2 minutes the unit wi...

Page 26: ...r starting if T stays in a zone for 3 minutes the frequency will change as follow Zone A Current frequency rise a grade till the maximum grade F8 Zone B Keep the current frequency of compressor Zone C...

Page 27: ...es the machine will turn back to previous setting mode 9 5 6 Indoor fan operation rule 1 In cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto 2 Auto f...

Page 28: ...anti cold wind function is preferential Auto fan action in heating mode 9 7 3 The operation frequency of compressor after starting submits to following rule When the machine runs if Th stays in a zone...

Page 29: ...two items are satisfied then judges if T2 has descended for more than 5 if it has the machine starts defrosting or continues to judge T2 and will not defrost until T2 drops more than 5 Condition 3 No...

Page 30: ...ne will turn into heating capacity test mode according to different ambient temperatures the buzzer will make a di sound for 2 seconds continuously Also indoor fan speed and compressor frequency will...

Page 31: ...1 Fan only T 1 Heating 9 8 2 Indoor fan will choose auto speed of relevant mode 9 8 3 If the machine switches mode between heating and cooling compressor will keep stopping for 15 minutes and then re...

Page 32: ...ill be open at different initial openings after compressor s start in different running modes Initial opening will be kept for 3 minutes before it is controlled according to the discharge temperature...

Page 33: ...um fan and low fan automatically according to running mode and outdoor ambient temperature 9 12 3 Action of outdoor fan in cooling drying mode including cooling in auto forced mode T4 is outdoor ambie...

Page 34: ...to mode T4 is outdoor ambient temperature 9 13 Oil return function 9 13 1 The unit will run with a higher frequency RET_OIL_FREQ2_ADD for RET_OIL_TIME2_ADD seconds when running frequency lower than RE...

Page 35: ...sleep function will be cancelled when reaching the setting time If the timing time is more than 7 hours the machine will not stop until reaches the setting off time in sleep mode 9 16 Auto Restart fun...

Page 36: ...33...

Page 37: ...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 38: ...of control E5 Open or short circuit of outdoor temperature sensor E6 Open or short circuit of room or evaporator temperature sensor E7 Outdoor fan speed out of control P0 Inverter module or IGBT over...

Page 39: ...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 PCB...

Page 40: ...NO YES Outdoor PCB is defective Replace the outdoor PCB YES Replace the outdoor fan motor NO Is all connections on PCB and between PCB and compressor good Repair or correct the connector or connection...

Page 41: ...ce of inverter compressor is it right 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 outd...

Page 42: ...inding by using the multi meter 10 3 2 Step Motor Model MP2835 for 9k MP2423B for 12k Measure the resistance value of each winding by using the multi meter Position Resistance Value Blue Red 0 71 20 f...

Page 43: ...ure 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 1 12 6...

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