Midea MSC-09HRFN1-QD2E Service Manual
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Midea MSC-09HRFN1-QD2E Service Manual

Midea MSC-09HRFN1-QD2E Service Manual

3d dc inverter split wall-mounted type
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SERVICE MANUAL

MIDEA AIR CONDITIONER
3D DC INVERTER
SPLIT WALL-MOUNTED TYPE
MSC-09HRFN1-QD2E
MSC-12HRFN1-QD2E
V1.1
May, 2010

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Summary of Contents for Midea MSC-09HRFN1-QD2E

  • Page 1: Service Manual

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

  • Page 2: Table Of Contents

    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. Electronic function ........................ 21 9.1 Abbreviation ........................21 9.2 Display function ........................
  • 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: Precaution

    1. Precaution There is risk of fire, electric shock, explosion, 1.1 Safety Precaution or injury. n To prevent injury to the user or other n Do not install the product on a people and property damage, the following defective installation stand. It may cause injury, accident, or damage to instructions must be followed.
  • Page 5 comes from product. Turn the breaker off or n Do not install the product where the disconnect the power supply cable. noise or hot air from the outdoor unit could There is risk of electric shock or fire. damage the neighborhoods. n Stop operation and close the window It may cause a problem for your neighbors.
  • Page 6 n Do not drink the water drained from n Do not recharge or disassemble the the product. batteries. Do not dispose of batteries in a fire. It is not sanitary could cause serious health They may burn of explode. issues. n If the liquid from the batteries gets n Use a firm stool or ladder when onto your skin or clothes, wash it well with clean...

  • Page 7: Function

    2. Function Indoor unit Operation by remote controller Sensing by room temperature Room temperature sensor. Pipe temperature sensor. Room temperature control Maintain the room temperature in accordance w ith the setting temperature. Anti-freezing control in cooling Prevent the water being frozen on evaporator by sensing the evaporator pipe temperature in cooling mode Time Delay Safety control Restarting is for approx.
  • Page 8 Outdoor unit Power relay control The unit has 3 mins delay between continuously ON/OFF operations. Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly. Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation.

  • Page 9: Dimension

    3. Dimension 3.1 Indoor Unit MSC-09HRFN1-QD2E MSC-12HRFN1-QD2E Model W(mm) H(mm) D(mm) MSC-09HRFN1-QD2E MSC-12HRFN1-QD2E...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit MOC1-09HFN1-QD2E MOF-12HFN1-QD2E...

  • Page 11: Specification

    4. Specification Indoor MSC-09HRFN1-QD2E MSC-12HRFN1-QD2E Outdoor MOC1-09HFN1-QD2E MOF-12HFN1-QD2E Power supply Ph-V-Hz 1,220-240V~,50/60Hz 1, 220-240V~, 50/60Hz Moisture Removal Max. input consumption 1950 2950 Max. current 13.5 Model DA108X1C-20FZ3 DA150S1C-20FZ Type Rotary DC Twin-Rotary DC Brand TOSHIBA TOSHIBA Capacity 3195 4480 Compressor...

  • Page 12: Refrigerant Cycle Diagram

    5. Refrigerant cycle diagram...

  • Page 13: Wiring Diagram

    6. Wiring diagram 6.1 Indoor Unit MSC-09HRFN1-QD2E MSC-12HRFN1-QD2E...

  • Page 14: Outdoor Unit

    6.2 Outdoor Unit MOC1-09HFN1-QD2E MOF-12HFN1-QD2E...

  • Page 15: Installation Details

    7. Installation details 7.1 Wrench torque sheet for installation Outside diameter Torque inch Kgf.m Ф6.35 Ф9.52 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Grade Unit 7.3 Pipe length and the elevation Standard Max.
  • Page 16 Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it prevents the gas leakage from the refrigeration cycle. Procedure 1. Recheck the piping connections. Caution: 2. Open the valve stem of the 2-way valve If gas leakage is discovered in step (3) above, counterclockwise approximately 90’...

  • Page 17: Pumping Down (Re-Installation)

    7.5 Pumping down (Re-installation) 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. 2.

  • Page 18: Re-Air Purging (Re-Installation)

    7.6 Re-air purging (Re-installation) 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. Leave the valve on the charging cylinder closed. 3.

  • Page 19: Balance Refrigerant Of The 2-Way, 3-Way Valves

    7.7 Balance refrigerant of the 2-way, 3-way valves Procedure: 1. Confirm that both the 2-way and 3-way valves are set to the open position. 2. Connect the charge set to the 3-way valve’s service port. Leave the valve on the charge set closed. Connect the charge hose with the push pin to the service port.

  • Page 20: Evacuation

    7.8 Evacuation Procedure: 1. Connect the vacuum pump to the charge set’s centre hose. 2. Evacuation for approximately one hour. Confirm that the gauge needle has moved 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 turning off the vacuum pump).

  • Page 21: Gas Charging

    7.9 Gas charging Procedure: 1. Connect the charge hose to the charging cylinder. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. 2. Purge the air from the charge hose. 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).

  • Page 22: Operation Characteristics

    8. Operation characteristics 8.1 MSC-09HRFN1-QD2E Piping Length Characteristics (Cooling) Cooling Characteristics 2.70 2.75 2.65 2.70 2.60 2.65 2.55 2.60 2.50 2.55 2.45 2.50 2.40 2.45 0.64 0.68 0.62 0.66 0.60 0.64 0.58 0.62 0.56 0.60 0.54 0.58 0.56 0.52 10 11 12 13 14...

  • Page 23: Msc-12Hrfn1-Qd2E

    8.2 MSC-12HRFN1-QD2E Piping Length Characteristics (Cooling) Cooling Characteristics 0.84 0.92 0.80 0.88 0.76 0.84 0.72 0.80 0.68 0.76 0.64 0.72 10 11 12 13 14 25 27 29 31 33 35 37 39 41 43 Piping Length (m) ℃ Outdoor Ambient Temperature ( ) Remark: Indoor room temperature: 27/19℃...

  • Page 24: Electronic Function

    9. Electronic function 9.1 Abbreviation T1: Indoor ambient temperature T2: Pipe temperature of indoor heat exchanger T3: Pipe temperature of outdoor heat exchanger T4: Outdoor ambient temperature 9.2 Display function 9.2.1 Icon explanation on indoor display board. ① Auto indicator This indicator illuminates when the air conditioner is in AUTO operation.
  • Page 25 3) If Td<90℃, compressor will restart or run without restricted frequency 9.3.3 Three Minutes Delay at restart for compressor. It will take 3 minutes every time when compressor starts. It will take only 1 minute when the unit is powered on at first time. 9.3.4 Temperature sensor protection at open circuit or short circuit.

  • Page 26: Fan-Only Mode

    9.4 Fan-Only Mode 9.4.1 Temperature setting function is disabled, and no setting temperature display. 9.4.2 In this mode, the action of louver is the same as in cooling mode. 9.4.3 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24℃ setting temperature.

  • Page 27: Drying Mode

    9.5.4 Rating cooling capacity 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 these signals), the machine will turn into rating capacity test mode, the buzzer will make a “di”...
  • Page 28 1) Anti-cold-wind function. ℃ setting fan speed medium fan low fan breeze super breeze fan stop 2) If the compressor stops caused by room temperature rising, indoor fan will be forced to run 127 seconds with breeze. During this period, anti-cold-wind is disabled. After this, anti-cold –wind function is available. 3) If the machine runs in rating capacity test mode, indoor fan runs with rating speed, and anti-cold-wind is disabled.
  • Page 29 If any one of following items is satisfied, defrosting will finish and the machine will turn to normal heating mode. a) T3 rises to be higher than 12℃. b) T3 rises to be higher than 8℃ and remains for 80 seconds. c) The machine has run for 10 minutes in defrosting. 9.7.7 Defrosting action. For model MSC-09HRFN1-QD2E...
  • Page 30 compressor 4-way valve outdoor fan indoor fan indoor fan breeze 10s 120s 130s no longer than 10 minutes For model MSC-12HRFN1-QD2E 9.7.8 Heating capacity test function. 1) Set the indoor unit with remote controller as: high fan, 30℃ in heating mode, 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 heating capacity test mode according to different ambient temperatures, the buzzer will make a “di”...

  • Page 31: Auto Mode Function

    Rated heating Maximum heating Medium heating Minimum heating capacity capacity capacity capacity 4≤T4<12℃ -2℃≤T4<4℃ -10℃≤T4<-2℃ T4<-10℃ Outdoor ambient temp. range when entering test Frequency fixed RATIFH MAXRATIFH ZRATIFH MINRATIFH Fan speed fixed RAHFAN MAXRAHFAN ZRAHFAN MINRAHFAN T4: Outdoor ambient temperature 2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting temperature.

  • Page 32: Action Of Electronic Control Valve

    4-way valve is on. If the machine changes operation mode, 4-way valve will be delayed off 2 minutes after compressor stops. (For model MSC-09HRFN1-QD2E) In cooling, drying, fan-only, or turning off mode, 4-way valve is off, while in heating mode 4-way valve is on.

  • Page 33: Action Of Outdoor Fan

    EEV opening will be fixed at PMV_COOL_RAT_PLS_ADD when the unit is on rating cooling capacity test. EEV opening will be fixed at PMV_HEAT_RAT_PLS_ADD when the unit is on rating heating capacity test. When the unit is turned off, EEV will be closed completely(-160p) and then be at the maximum opening(480p). 9.12 Action of outdoor fan 9.12.1 Outdoor fan is Brushless DC (BLDC) fan.

  • Page 34: Oil Return Function

    The unit will quit low ambient cooling function when: 1） T4>15℃ and T3≧20℃ for 1 minute (Outdoor fan will run during this 1 minute.) The unit will re-judge the entering condition when T4 15℃ 1 minute later. ≦ 2） Compressor stops. (Re- judge the entering condition when compressor restarts.) 9.12.5 Outdoor fan speed will be fixed at DC_FAN_COOL_RAT_SPD_ADD when the unit is on rating cooling capacity test.

  • Page 35: Sleep Function Mode

    9.14.4 Timer on/off. After turning off, the machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 9.14.5 Timer off/on. After turning on, the machine will turn off automatically when reaching the setting “off” time, and then turn on automatically when reaching the setting “on”...

  • Page 37: Troubleshooting

    10. Troubleshooting 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. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Bulb (25-40W)

  • Page 38: Indoor Unit Error Display

    10.1 Indoor Unit Error Display Display LED STATUS EEPROM parameter error Indoor / outdoor units communication protection Indoor fan speed out of control Open or short circuit of outdoor temperature sensor Open or short circuit of room or evaporator temperature sensor Outdoor fan speed out of control Inverter module (or IGBT) over-strong current protection Over voltage or too low voltage protection...

  • Page 39: Diagnosis And Solution

    10.2 Diagnosis and Solution 10.2.1 E0(EEPROM parameter error) error diagnosis and solution Circuit or software error on indoor PCB Replace indoor PCB 10.2.2 E1(indoor / outdoor units communication protection) error diagnosis and solution Disconnect the power supply, after 1 minute, connect the power supply , turn on the unit with remote controller Does the unit work normally?
  • Page 40 10.2.4 E5(Open or short circuit of outdoor temperature sensor) diagnosis and solution. Is the outdoor temperature Repair the connector and sensor connector and reconnect connection good? Replace the sensor and Replace outdoor e-box check if E5 display again? 10.2.5 E6(open or short circuit of room or evaporator temperature sensor) diagnosis and solution. Is the indoor temperature and evaporator sensor Repair the connector and...
  • Page 41 10.2.8 P1(over voltage or too low voltage protection) diagnosis and solution. Be sure the power supply is Is the power supply good? normal when using the units Replace the outdoor e-box. 10.2.9 P2(temperature protection of compressor top) diagnosis and solution. Is the connection Does compressor Reconnect and retest.

  • Page 42: Key Parts Checking

    10.3 Key parts checking. 10.3.1. Compressor checking (Model: DA108X1C-20FZ3 for 9k; DA150S1C-20FZ for 12k). Measure the resistance value of each winding by using the multi-meter. Position Resistance Value Blue - Red 0.71Ω (20℃) for DA108X1C-20FZ3; Blue - Black 0.95Ω (20℃)for DA150S1C-20FZ. Red - Blue 10.3.2 Step Motor (Model: MP2835 for 9k;...
  • Page 43 10.3.3 Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor exhaust temp.(Te) sensor. 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 (℃) Resistance Value (KΩ) 26.9...

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Msc-12hrfn1-qd2e

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