Midea 11MSFI-A2-1301 Service Manual
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Midea 11MSFI-A2-1301 Service Manual

Oasis 3d inverter series
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OASIS 3D INVERTER SERIES
Service Manual 2013
11MSFI-A2-1301

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Summary of Contents for Midea 11MSFI-A2-1301

  • Page 1 OASIS 3D INVERTER SERIES Service Manual 2013 11MSFI-A2-1301...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Function ................................ 7 3. Dimension ..............................8 3.1 Indoor Unit ............................. 8 3.2 Outdoor Unit ..........................10 4. Refrigerant Cycle Diagram ........................11 5. Wiring Diagram ............................13 5.1 Indoor Unit ...........................

  • Page 3: Precaution

    1. Precaution 1.1 Safety Precaution  To prevent injury to the user or other people and property damage, the following instructions must be followed.  Incorrect operation due to ignoring instruction will cause harm or damage.  Before service the unit, be sure to read this service manual at first. 1.2 Warning ...
  • Page 4 condenser and evaporator.  For installation, always contact the dealer or an authorized service center.  Do not install the product on a defective installation stand.  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 There is risk of property damage, failure of product, or electric shock.  Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure. ...
  • Page 6 could cause product malfunction or inefficient operation.  Operational  Do not expose the skin directly to cool air for long time. (Do not sit in the draft).  Do not use the product for special purposes, such as preserving foods, works of art etc. It is a consumer air conditioner, not a precision refrigerant system.

  • Page 7: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units MS11MU-09HRFN1-QRD0W MOC-09HFN1-QRD0W MS11M-09HRFN1-QRD1W(A) MOC-09HFN1-QRD1W MS11MU-12HRFN1-QRD0W MOC-12HFN1-QRD0W Inverter MS11M-12HRFN1-QRD1W(A) MOC-12HFN1-QRD1W MS11MU-12HRFN1-QRD0W(B) MOC1-12HFN1-QRD0W MS11MU-18HRFN1-QRC8GW MOC-18HFN1-QRC8W MS11M1-24HRDN1-QRC8W MOF-24HFN1-QRC8W Inverter Filter Killer Of Formaldehyde Ionizer(O) Silent mode(O) Plasma(O) Horizontal &Vertical Swing Function(O) Silver Ico Filter(O) Louver Position Memory Function Vitamin C Filter(O)

  • Page 8: Dimension

    3. Dimension 3.1 Indoor Unit Model MS11MU-09HRFN1-QRD0W MS11M-09HRFN1-QRD1W(A) MS11MU-12HRFN1-QRD0W MS11MU-12HRFN1-QRD0W(B) MS11M-12HRFN1-QRD1W(A) MS11MU-18HRFN1-QRC8GW MS11M1-24HRDN1-QRC8W 1186 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) MS11MU-09HRFN1-QRD0W MS11M-09HRFN1-QRD1W(A) ￠65 MS11MU-12HRFN1-QRD0W MS11MU-12HRFN1-QRD0W(B)
  • Page 9 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) MS11M-12HRFN1-QRD1W(A) ￠65 MS11MU-18HRFN1-QRC8GW Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) ￠65 MS11M1-24HRDN1-QRC8W...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space) More than 30cm More than 60cm More than 70cm Model MOC-09HFN1-QRD0W MOC-09HFN1-QRD1W MOC-12HFN1-QRD0W MOC-12HFN1-QRD1W MOC1-12HFN1-QRD0W MOC-18HFN1-QRC8W MOF-24HFN1-QRC8W...

  • Page 11: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram For 9k,12k,18k models: INDOOR OUTDOOR Electronic Expansion Valve LIQUID SIDE CAPILIARY TUBE 2-WAY VALVE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 12: For 24K Model

    For 24k model: INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE REVERSING VALVE 3-WAY VALVE (Heating Model only) ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 13: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit MS11MU-09HRFN1-QRD0W,MS11M-09HRFN1-QRD1W(A),MS11MU-12HRFN1-QRD0W, MS11M-12HRFN1-QRD1W(A), MS11MU-12HRFN1-QRD0W(B), MS11MU-18HRFN1-QRC8GW MS11M1-24HRDN1-QRC8W...

  • Page 14: Outdoor Unit

    5.2 Outdoor Unit MOC-09HFN1-QRD0W, MOC-09HFN1-QRD1W, MOC-12HFN1-QRD0W, MOC-12HFN1-QRD1W, MOC1-12HFN1-QRD0W, MOC-18HFN1-QRC8W MOF-24HFN1-QRC8W...

  • Page 15: Installation Details

    6 Installation Details 6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) Ф15.9 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²...

  • Page 16: Pipe Length And The Elevation

    6.3 Pipe length and the elevation The pipe length and refrigerant amount: Pipe size Standard Max. Max. Additional Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) MS11MU-09HRFN1-QRD0W+ MOC-09HFN1-QRD0W MS11M-09HRFN1-QRD1W(A)+ MOC-09HFN1-QRD1W 3/8’’ 1/4’’ MS11MU-12HRFN1-QRD0W+ MOC-12HFN1-QRD0W (Ф9.52) (Ф6.35) MS11M-12HRFN1-QRD1W(A)+ MOC-12HFN1-QRD1W MS11MU-12HRFN1-QRD0W(B)+ MOC1-12HFN1-QRD0W 1/4’’...

  • Page 17: Installation For The First Time

    6.4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below: ● Pressure in the system rises. ● Operating current rises. ● Cooling or heating efficiency drops. ● Moisture in the refrigerant circuit may freeze and block capillary tubing. ●...
  • Page 18 the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there are some leakage points. Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
  • Page 19 Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position.

  • Page 20: Adding The Refrigerant After Running The System For Many Years

    6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m.

  • Page 21: Re-Installation While The Indoor Unit Need To Be Repaired

    6).When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low side), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7).
  • Page 22 5). Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa. 6). Set the 3-way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts.

  • Page 23: Re-Installation While The Outdoor Unit Need To Be Repaired

    Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2-way valve approximately 45’ until the gauge indicates 0.3 to 0.5 Mpa. 6). Disconnect the charge set and the charging cylinder, and set the 2-way and 3-way valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 24 2. Refrigerant charging Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
  • Page 25 Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage...

  • Page 26: Operation Characteristics

    7. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode ≥17℃ ≤30℃ ＞10℃ Room temperature 0℃～50℃ -15℃～50℃ Outdoor temperature -15℃～30℃ 0℃～50℃ (For the models with low temperature cooling system) CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally.

  • Page 27: Electronic Function

    8. Electronic function 8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. ION indication lamp(optional function)：This lamp illuminates when Clean Air feature is activated.

  • Page 28: Main Protection

    8.3 Main Protection 8.3.1 Time delay at restart for compressor 1 minute delay for the 1 time start-up and 3 minutes delay for others. 8.3.2 Temperature protection of compressor top The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp.
  • Page 29 If T4＞5℃ or the compressor starts running, the preheating function will stop. 8.3.8 Sensor protection at open circuit and breaking disconnection. When there’s one temperature sensor in malfunction, the air conditioner will display error code and will not stop immediately, to avoid the case that the air conditioner is in urgent need. Fault temp.

  • Page 30: Operation Modes And Functions

    8.4 Operation Modes and Functions 8.4.1 Fan mode (1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates same as in cooling mode. (5) Auto fan: T1-24 (H-L)*0.75+L...
  • Page 31 8.4.2 Cooling Mode 8.4.2.1 Compressor running rules The maximum operation frequency of compressor after starting submits to following rule. Fmax=T4FREMAX1 Fmax=T4FREMAX2 Fmax=T4FREMAX3 Fmax=T4FREMAX4 Fmax=T4FREMAX5 Fmax=T4FREMAX6 Fmax=T4FREMAX7 Meanwhile, the maximum frequency is limited by the indoor fan speed. Indoor fan speed Maximum frequency High speed / turbo function No limit...
  • Page 32 T1-Ts -1.0 -1.5 While the zones of A,B,C... are corresponding to different compressor running frequency. Note: When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules: A:Increase the frequency to 3 grade higher until to FREMAX. B~E: Increase the frequency to 2 grade higher until to FREMAX.
  • Page 33 8.4.2.2 Outdoor fan running rules Cooling Heating While A,B,C…means different fan speed of outdoor unit. 8.4.2.3 Indoor fan running rules In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and silent.
  • Page 34 The auto fan acts as below rules: T1-Ts (H-L)*0.75+L (H-L)*0.5+L (H-L)*0.25+L 8.4.2.4 Condenser temperature protection ---55℃<T3<60℃, the compressor frequency will decrease to the lower level until to F1 and then runs at F1.If T3<54℃, the compressor will keep running at the current frequency. ---T3<52℃, the compressor will not limit the frequency and resume to the former frequency.
  • Page 35 8.4.3 Heating Mode 8.4.3.1 Compressor running rules The maximum operation frequency of the compressor after starting submits to the following rule. Fmax=T4FREHEATMAX1 Fmax=T4FREHEATMAX2 Fmax=T4FREHEATMAX3 Fmax=T4FREHEATMAX4 Fmax=T4FREHEATMAX5 Fmax=T4FREHEATMAX6 Fmax=T4FREHEATMAX7 Fmax=T4FREHEATMAX8 Fmax=T4FREHEATMAX9 Fmax=F21 Fmax=F22 Fmax=F23 Fmax=F24 Fmax=F25...
  • Page 36 Meanwhile, the maximum frequency is limited by the indoor fan speed. Indoor fan speed Maximum frequency High speed/8 degree heating/ turbo function No limit Medium speed FHeatMaxMidFan Low speed/sleep mode FHeatMaxLowFan Silent mode Fixed at F3 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp.
  • Page 37 Meanwhile, the compressor running frequency is limited by the current. HeatT4Zone4I HeatT4Zone3I HeatT4Zone2I HeatT4Zone1I 8.4.3.2 Outdoor fan running rules Heating 8.4.3.3 Indoor fan running rules In heating mode, indoor fan can be selected as high, medium, low, auto and silent. The anti-cold- wind function is preferential.
  • Page 38 If the compressor stops caused by the room temperature rising, the indoor fan will be forced to run 127 seconds with breeze. During this period, the anti-cold-wind is disabled. Auto fan action in heating mode: T1-Ts+ΔT -1.0 (H+-L)*0.2+L -2.0 (H+-L)*0.4+L -3.0 (H+-L)*0.6+L -4.0...
  • Page 39 8.4.3.4 Defrosting mode Condition of defrosting: If any one of the following items is satisfied, AC will enter the defrosting mode. After the compressor starts up and keeps running, mark the minimum value of T3 from the 10th minutes to 15th minutes as T30. 1)If the compressor cumulate running time is up to 29 minutes and T3<...
  • Page 40 Defrosting action： For MS11MU-09HRFN1-QRD0W, MS11M-09HRFN1-QRD1W(A),MS11MU-12HRFN1-QRD0W, MS11M-12HRFN1-QRD1W(A), MS11M1-24HRDN1-QRC8W Frequency F3 FrequencyF16 Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) no longer than 10m xx=60 For MS11MU-18HRFN1-QRC8GW Frequency F3 Frequency F16 Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) no longer than 10m xx=60...
  • Page 41 8.4.3.5 Evaporator coil temperature protection TEstop Decrease TEdown Hold TEnorm Resume Off: Compressor stops. Decrease: Decrease the running frequency to the lower level. Hold: Keep the current frequency. Resume: No limitation for frequency. 8.4.4 Auto-mode This mode can be chosen with remote controller and the setting temperature can be changed between 17~30℃.
  • Page 42 T1-Ts 8.4.5.3 Low indoor room temperature protection In drying mode, if room temperature is lower than 10℃, the compressor will stop and not resume until room temperature exceeds 12℃. 8.4.5.4 Evaporator anti-freezing protection, condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode.
  • Page 43 8.4.7.4 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 8.4.7.5 Timer off/on. The machine will turn off automatically when reaching the setting “off” time, and then turn on automatically when reaching the setting “on”...
  • Page 44 8.4.10 8℃ Heating(optional) In heating operation, the preset temperature of the air conditioner can be as lower as 8℃, which keeps the room temperature steady at 8℃ and prevents household things freezing when the house is unoccupied for a long time in severe cold weather. 8.4.11 Follow me(optional) If the indoor PCB receives the signal which results from pressing the FOLLOW ME button on remote controller, the buzzer will emit a sound and this indicates the follow me function is initiated.
  • Page 45 leakage. 8.4.14 Louver Position Memory Function When starting the unit again after shutting down, its louver will restore to the angle originally set by the user, but the precondition is that the angle must be within the allowable range, if it exceeds, it will memorize the maximum angle of the louver.

  • Page 46: Troubleshooting

    9. Troubleshooting 9.1 Indoor Unit Error Display Operation lamp Timer lamp Display LED STATUS ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 3 times Zero crossing signal detection error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 47: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution(E0) Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? If the EEPROM chip is welded on main PCB, replace the main PCB directly.
  • Page 48 9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution(E1) Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check all the wirings between indoor and outdoor, indoor main PCB and outdoor main PCB following the wiring diagram.
  • Page 49 9.2.3 Zero crossing detection error diagnosis and solution(E2) Check if the connections and Correct the connections. Turn on the power supply is normal? unit when the power supply is good. Indoor main PCB is defective. Replace indoor main PCB. 9.2.4 Fan speed has been out of control diagnosis and solution(E3/F5) Shut off the power supply and turn it on 5 seconds The unit operates normally.
  • Page 50 Index 1: 1.Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Measure the resistance value of each winding by using the tester. If any resistance value is zero, the fan motor must has problems and need to be replaced. 2.
  • Page 51 2) Power on and when the unit is in standby, measure the voltage of pin4-5 in feedback signal connector. If the value is not 5V, change the PCB. Otherwise, go to step 3. 3) Rotate the fan by hand, measure the voltage of pin1-5, pin 2-5 and pin 3-5 in feedback signal connector.
  • Page 52 9.2.4 Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3) Check the connections between temperature Correct the connections. sensor and PCB. Are the connections good? Check the resistance value of the sensor via table1 Replace indoor or outdoor PCB. and table 2, is it normal? Replace the sensor and c h e c k i f t h e p r o b l e m...
  • Page 53 9.2.5 Refrigerant Leakage Detection diagnosis and solution(EC) Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? Check if T2 sensor is well Is there cool air blowing fixed. Correct the installation or replace T2 sensor.
  • Page 54 9.2.6 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors. are broken? Correct the installation, Check if the IPM installed correctly.
  • Page 55 9.2.8 Over voltage or too low voltage protection diagnosis and solution(P1) Disconnect the unit with power Check if the power supply is supply and try to restart the unit normal. when power supply gets normal. Check if all the connections Correct the connections or replace and wires are good? the wires.
  • Page 56 9.2.9 Inverter compressor drive error diagnosis and solution(P4) Check if the wiring between main Correct the connection or PCB and compressor connected by replace the wires and error and if the wires and connectors connectors. are broken? Correct the installation, Check if the IPM installed correctly.
  • Page 57 Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) Connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.
  • Page 58 Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter. Table 1:Some frequently-used R-T data for T1,T2,T3 and T4 sensor: Temperature (℃) Resistance Value (KΩ) 26.9...
  • Page 59 Spec. Code 2T0032300815 2T0032500630 2T0032800605 Model MS11MU-09HRFN1-QRD0W EMS11MU-12HRFN1-QRD0W MS11MU-18HRFN1-QRC8W Compressor DA108X1C-20FZ3 DA130M1C-31FZ DA150S1C-20FZ WZDK20-38G WZDK20-38G WZDK58-38G Indoor fan motor (☆) (☆) (☆) Outdoor fan WZDK35-38G(H) WZDK35-38G(H) WZDK35-38G(H) motor (★) (★) (★) Code 2T0032300814 2T0032500629 2T0032500647 Model MS11M-09HRFN1-QRD1W(A) MS11M-12HRFN1-QRD1W(A) MS11MU-12HRFN1-QRD0W(B) Compressor DA108X1C-20FZ3 DA130M1C-31FZ DA108X1C-20FZ3...
  • Page 60 Red - Blue 3.IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Normal resistance Digital tester value (+)Red (-)Black...

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