Midea MSR1-07HRN1-QB6A Service Manual
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Midea MSR1-07HRN1-QB6A Service Manual

Midea MSR1-07HRN1-QB6A Service Manual

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RSEU-A1-1206

SERVICE MANUAL

MIDEA AIRCONDITIONER
EUROPE MARKET
SPLIT WALL-MOUNTED TYPE
R ON-OFF SERIES

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Summary of Contents for Midea MSR1-07HRN1-QB6A

  • Page 1: Service Manual

    RSEU-A1-1206 SERVICE MANUAL MIDEA AIRCONDITIONER EUROPE MARKET SPLIT WALL-MOUNTED TYPE R ON-OFF SERIES...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Function ................................ 6 3. Dimension ..............................8 3.1 Indoor Units ........................... 8 3.2 Outdoor Units ..........................11 4. Refrigerant Cycle Diagram ........................13 5. Wiring Diagram ............................15 5.1 Indoor Units ..........................

  • 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 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. There is risk of fire, electric shock, explosion, or injury.  Do not install the product on a defective installation stand. It may cause injury, accident, or damage to the product. ...
  • Page 5 There is risk of explosion or fire.  If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the power supply cable. There is risk of electric shock or fire.  Stop operation and close the window in storm or hurricane. If possible, remove the product from the window before the hurricane arrives.
  • Page 6 It can avoid vibration of water leakage.  Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors.  Use two or more people to lift and transport the product. Avoid personal injury.
  • Page 7 operated. There are sharp and moving parts that could cause personal injury.  Do not drink the water drained from the product. It is not sanitary could cause serious health issues.  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.

  • Page 8: Function

    2. Function Model Names of Indoor/Outdoor Units Series Capacity Indoor units Outdoor units MSR1-07HRN1-QB6(A) MOK1-07HN1-QB6 MSR1-07HRN1-QC2(A) MOK2-07HN1-QC2 MSR1-07HRN1-QC2 MOK1-07HN1-QC2 MSR1-09HRN1-QB6(A) MOK-09HN1-QB6 MSR1-09CRN1-QB8 MOK-09CN1-QB8 MSWR1-09CRN1-QB9 MOW-09CN1-QB9 MSR1-09CRN1-QC2(A) MOA-09CN1-QC2 MSR1-09HRN1-QC2 MOA1-09HN1-QC2 MSR1-09HRN1-QC2 MOA3-09HN1-QC2 MSR1-12HRN1-QB6(A) MOA-12HN1-QB6 MSR1-12HRN1-QB6 MOA-12HN1-QB6 MSR1-12HRN1-QB8 MOB-12HRN1-QB8 MSR1-12CRN1-QB8 MOB-12CN1-QB8 MSWR1-12CRN1-QB9 MOX-12CN1-QB9 MSR1-12CRN1-QC2 MOB-12CN1-QC2...
  • Page 9 Filter Killer of Formaldehyde Ionizer(O) Silver Ico Filter(O) Follow me(O) Vitamin C Filter(O) Self-diag. function 3M HAM Filter(O) Anti-rust cabinet Bio Filter(O) Valve protection cover Golden Fin(O) PTC Heating Belt(O) Self Clean(O) Compressor Crankcase Heater(O)

  • Page 10: Dimension

    3. Dimension 3.1 Indoor Units Figure Models MSR1-07HRN1-QC2(A) MSR1-07HRN1-QB6(A) Figure 1 MSR1-09HRN1-QB6(A) MSR1-09CRN1-QC2(A) MSR1-12HRN1-QB6(A) MSR1-07HRN1-QC2 MSR1-09HRN1-QC2 MSWR1-09CRN1-QB9 MSR1-09CRN1-QB8 MSR1-12CRN1-QC2 Figure 2 MSR1-12HRN1-QC2 MSR1-12HRN1-QB6 MSR1-12CRN1-QB8 MSR1-12HRN1-QB8 MSR1-16HRN1-QB8(A) MSR1-16HRN1-QC2 MSR1-17CRN1-QB8 MSR1-18CRN1-QB8 Figure 3 MSR1-18HRN1-QC2 MSR1-18HRN1-QB6 MSWR1-12CRN1-QB9 MSWR1-18CRN1-QB9 Figure 4 1036 MSWR1-21CRN1-QB6...
  • Page 11 MSR1-21HRN1-QB4W MSR1-21CRN1-QB8W MSR1-21HRN1-QB8W MSR1-24CRN1-QB8W MSR1-24HRN1-QB8W MSR1-24HRN1-QB4W Dimension of installation Model R(mm) L(mm) H(mm) hole(mm) MSR1-07HRN1-QC2(A) MSR1-09CRN1-QC2(A) Φ65 MSR1-12HRN1-QB6(A) 111.5 MSR1-07HRN1-QB6(A) MSR1-09HRN1-QB6(A) MSR1-09CRN1-QB8 MSWR1-09CRN1-QB9 MSR1-12CRN1-QC2 MSR1-12HRN1-QC2 Φ65 MSR1-12HRN1-QB8 83.5 MSR1-16HRN1-QB8(A) MSR1-09HRN1-QC2(2T0032300791) MSR1-12HRN1-QB6 MSR1-12CRN1-QB8 MSWR1-12CRN1-QB9 MSR1-17CRN1-QB8 MSR1-18CRN1-QB8 Φ65 MSR1-18HRN1-QB6 MSR1-16HRN1-QC2 MSR1-18HRN1-QC2...
  • Page 12 MSWR1-18CRN1-QB9 MSR1-21CRN1-QB8W MSWR1-21CRN1-QB6 Φ65 MSR1-21HRN1-QB4W MSR1-21HRN1-QB8W MSR1-24CRN1-QB8W MSR1-24HRN1-QB4W MSR1-24HRN1-QB8W MSR1-09HRN1-QC2(2T0032300235) Φ65 MSR1-07HRN1-QC2...

  • Page 13: Outdoor Units

    3.2 Outdoor Units More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 70cm Model MOK2-07HN1-QC2 MOK1-07HN1-QB6 MOK-09CN1-QB8 MOK-09HN1-QB6 MOK1-07HN1-QC2 MOA-09CN1-QC2 MOA1-09HN1-QC2 MOA-12HN1-QB6 MOA3-09HN1-QC2 MOB-12CN1-QC2 MOB2-12HN1-QC2...
  • Page 14 MOB-12HRN1-QB8 MOB-16HN1-QC2 MOB-17CN1-QB8 MOB-12CN1-QB8 MOB1-18HN1-QB6 MOB-18HN1-QB6 MOC-18CN1-QB8 MOC-18HN1-QC2 MOC-21HN1-QB4W MOP-21CN1-QB8W MOP1-21HN1-QB8W MOP-24HN1-QB4W MOF-24CN1-QB8W MOX-12CN1-QB9 MOX-18CN1-QB9 MOX-21CN1-QB6 MOF-21HN1-QB8W MOF3-21HN1-QB8W MOF-24CN1-QB8W MOF2-24HN1-QB8W MOW-09CN1-QB9: Dimension:450x390x353 (WDH) mm...

  • Page 15: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram For cooling only models: INDOOR OUTDOOR LIQUID SIDE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR...
  • Page 16 For heat pump models: 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 17: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Units MSR1-07HRN1-QC2(A), MSR1-12HRN1-QB6(A), MSR1-12HRN1-QC2 MSR1-09CRN1-QC2(A), MSR1-12CRN1-QC2, MSR1-17CRN1-QB8...
  • Page 18 MSR1-09CRN1-QB8, MSR1-12CRN1-QB8, MSWR1-09CRN1-QB9, MSWR1-12CRN1-QB9, MSR1-18CRN1-QB8...
  • Page 19 MSWR1-18CRN1-QB9, MSWR1-21CRN1-QB6 MSR1-24CRN1-QB8W,...
  • Page 20 MSR1-21CRN1-QB8W, MSR1-21HRN1-QB8W MSR1-07HRN1-QB6(A), MSR1-07HRN1-QC2, MSR1-09HRN1-QC2,MSR1-09HRN1-QB6(A), MSR1-09HRN1-QC2, MSR1-12HRN1-QB8, MSR1-12HRN1-QB6, MSR1-16HRN1-QC2 MSR1-16HRN1-QB8(A), MSR1-18HRN1-QC2, MSR1-18HRN1-QB6...
  • Page 21 MSR1-21HRN1-QB8W,MSR1-21HRN1-QB4W, MSR1-24CRN1-QB8W, MSR1-24HRN1-QB8W, MSR1-24HRN1-QB4W...

  • Page 22: Outdoor Units

    5.2 Outdoor Units MOK2-07HN1-QC2, MOA-12HN1-QB6, MOB2-12HN1-QC2...
  • Page 23 MOA-09CN1-QC2, MOB-12CN1-QC2...
  • Page 24 MOB-17CN1-QB8...
  • Page 25 MOC-18CN1-QB8...
  • Page 26 MOP-21CN1-QB8W, MOP1-21HN1-QB8W...
  • Page 27 MOK-09CN1-QB8, MOB-12CN1-QB8 MOW-09CN1-QB9...
  • Page 28 MOX-12CN1-QB9, MOX-18CN1-QB9, MOX-21CN1-QB6 MOF-24CN1-QB8W...
  • Page 29 MOC-18HN1-QC2 MOK1-07HN1-QC2,MOK1-07HN1-QB6, MOA1-09HN1-QC2, MOA3-09HN1-QC2,MOK-09HN1-QB6, MOA-12HN1-QB6, MOB-12HRN1-QB8, MOB-16HN1-QC2,MOB1-18HN1-QB6, MOB-18HN1-QB6...
  • Page 30 MOC-21HN1-QB4W,MOP-24HN1-QB4W MOF-21HN1-QB8W 202038090201...
  • Page 31 MOF3-21HN1-QB8W, MOF2-24HN1-QB8W 202038090672...
  • Page 32 MOF-24CN1-QB8W 202035490277...

  • Page 33: Installation Details

    6. Installation details 6.1 Wrench torque sheet for installation Additional Outside diameter Torque tightening torque inch N.cm N.cm 1500 1600 Ф6.35 (153kgf.cm) (163kgf.cm) 2500 2600 Ф9.52 (255kgf.cm) (265kgf.cm) 3500 3600 Ф12.7 (357kgf.cm) (367kgf.cm) 4500 4700 Ф1 (459kgf.cm) (479kgf.cm) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet.

  • Page 34: Pipe Length And The Elevation

    6.3 Pipe length and the elevation The pipe length and refrigerant amount: Additional amount of Model Connective pipe length Air purging refrigerant Less than 5m Use vacuum pump ------------------ 7k,9k,12k,16k,17k,18k More than 5m Use vacuum pump (Pipe length – 5) × 20g/m 21k,24k More than 5m Use vacuum pump (Pipe length –...

  • Page 35: 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 36 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 37 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 38: 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 39: 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 40 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 41: 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.
  • Page 42 5). Disconnect the charge hose from the vacuum pump. 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 43: Operation Characteristics

    6). Mounted the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m. Be sure to check for gas leakage. 7. Operation characteristics CAUTION: 1. If air conditioner is used beyond the above conditions, the certain protections may action. 2.

  • Page 44: Electronic Function

    8. Electronic function 8.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. Auto indicator: This indicator illuminates when the air conditioner is in AUTO operation.

  • Page 45: Main Protection

    8.3 Main Protection 8.3.1 Time delay at restart for compressor. 8.3.2 Fan Speed is out of control. (only for 7k,9k,12,16k,17k,18k(except MSWR1-18CRN1-QB9) models) ----When Indoor Fan Speed keeps too low or too high for certain time, the unit will stop and the LED will display the failure 8.3.3 Current protection I3SEC...

  • Page 46: 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: For 7k,9k,12k,16k,17k,18k, MSWR1-21CRN1-QB6 models: For MSR1-21HRN1-QB4W, MSR1-21CRN1-QB8W, MSR1-21HRN1-QB8W, MSR1-24CRN1-QB8W,...
  • Page 47 Tm=Ts+1, Tn=Ts. Tm=Ts, Tn=Ts-2 for MSWR1-18CRN1-QB9 and MSWR1-21CRN1-QB6 models. 8.4.2.2 Outdoor fan running rules: The On-off outdoor units have single fan speed. The outdoor fan will run following the compressor except when AC is in evaporator high temp. protection in heating mode ,condenser high temp. protection in cooling mode, defrosting mode and the current protection.
  • Page 48 8.4.2.5 Condenser high temperature T3 protection(only for 21k,24k heat pump models) TE10 TE11 When T3≥TE10, the compressor will shut off. When T3＜TE11,the compressor will restart. 8.4.3 Heating Mode 8.4.3.1 Compressor running rules: For 21k,24k models, every time the compressors start up, they will keep running for △t minutes(protections are active) and then follow the below rules.
  • Page 49 For21k,24k models: While TE14=32℃ . For all the models, when the compressor is on, the indoor fan can be set to high/med/low/auto. And the anti-cold wind function has the priority. Anti-cold wind function: When the evaporator coil temp.T2 is getting higher, T2>TE2, the indoor fan will run at setting speed.
  • Page 50 When T1-Ts≤0℃, the indoor fan will run at medium speed. 8.4.3.4 High evaporator coil temp.T2 protection: For 21k,24k models: For other models: ℃ Compressor off Outdoor fan off Compressor and Outdoor fan on 8.4.3.5 Defrosting mode： For 7k,12k, MSR1-09HRN1-QC2, MSR1-09HRN1-QB6(A)models(except MSR1-07HRN1-QB6(A)) MSR1-16HRN1-QC2,MSR1-18HRN1-QB6 models: ...
  • Page 51 ℃ T2－T1 ＜TH High speed DEFROST ＜TM Medium speed DEFROST ＜TL Low speed DEFROST Breeze/off No need to compare the T2 and T1 (2) After the last defrosting, the time that the outdoor fan is off but the compressor is on in high T2 protection cumulates up to 90 minutes.
  • Page 52 For 21k,24k models: 1) Defrosting condition: AC will enter defrosting mode if any of the following items is satisfied. (1) When T3＜TC1℃, if the compressor keeps running over 40 minutes and T3＜TC3℃ for 3 minutes. (2) After the last defrosting, the time that the outdoor fan is off but the compressor is on in high T2 protection cumulates up to 90 minutes.
  • Page 53 Breeze or stop If indoor fan is breezing or stopped, start defrosting Condition 2: If the accumulated time of outdoor fan stopped but the compressor keep working due to evaporator high temperature protection mode reaches 90 min from the end of last defrosting mode. Condition of defrosting stop: If any one of following conditions occurs, the defrosting will finish and the machine will turn to normal heating mode.
  • Page 54 ΔT=T1-Ts Running mode ΔT＞2℃ Cooling -1≤ΔT≤2℃ Fan-only ΔT<-1 ℃ Heating(for cooling only models, they will run at fan-only mode) For MSWR1-18CRN1-QB9, MSWR1-21CRN1-QB6 models: ΔT=T1-Ts Running mode ΔT＞2℃ Cooling -3≤ΔT≤2℃ Fan-only ΔT<-3℃ Heating(for cooling only models, they will run at fan-only mode) For MSR1-21CRN1-QB8W, MSR1-21HRN1-QB8W, MSR1-21HRN1-QB4W, MSR1-24CRN1-QB8W , MSR1-24HRN1-QB8W,MSR1-24HRN1-QB4W models: ΔT=T1-Ts...
  • Page 55 6 minutes T1 ≥ TS+2 Breeze OFF 4 minutes 5 minutes TS ≤T1＜TS+2 Breeze OFF 5 minutes 4 minutes T1＜TS Breeze OFF 6 minutes ℃, the 8.4.5.2 In drying mode, if room temperature is lower than 10 indoor fan will run at breeze while the compressor and outdoor fan will stop and not resume until room temperature exceeds 13 ℃.
  • Page 56 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 58: Troubleshooting

    9. Troubleshooting 9.1 Indoor unit error display For MSR1-21CRN1-QB8W, MSR1-24CRN1-QB8W models: Operation Timer Auto lamp Failure lamp lamp ☆ ☆ ☆ Over current protection occurs 4 times. ☆ The T2 sensor is open circuit or short circuit ☆ The T1 sensor is open circuit or short circuit ☆...
  • Page 59 For MSWR1-18CRN1-QB9 and MSWR1-21CRN1-QB6 models: Error Failure EEPROM error The T1 sensor is open circuit or short circuit The T2 sensor is open circuit or short circuit For MSR1-16HRN1-QB8(A), MSR1-18HRN1-QC2, MSR1-07HRN1-QB6(A) models: Display LED STATUS EEPROM error Zero-Crossing Error Indoor fan speed has been out of control Over current protection of the compressor occurs 4 times Open circuit or short circuit of room temperature sensor Evaporator temperature sensor open circuit or short circuit...

  • Page 60: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 Indoor fan speed out of control diagnosis and solution Shut off the power supply and turn it on 5 seconds The unit operates normally. later.Is it still displaying the error code? S h u t o f f t h e p o w e r Disassembly the supply, rotate the cross connection between...
  • Page 61 9.2.2 Open circuit or short circuit of temperature sensor diagnosis and solution Check the connections between temperature Correct the connections. sensor and PCB. Are the connections good? Replace the sensor and c h e c k i f t h e p r o b l e m Replace indoor or outdoor PCB.
  • Page 62 9.2.4 EEPROM parameter error diagnosis and solution Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? Is the EEPROM chip Correct the connection. plugged in PCB well? Replace the indoor PCB. 9.2.5 Zero crossing detection error diagnosis and solution Check if the connections and Correct the connections.
  • Page 63 9.2.6 Indoor / outdoor units communication error diagnosis and solution 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 PCB and outdoor PCB following the wiring diagram.

This manual is also suitable for:

Msr1-07hrn1-qc2aMsr1-07hrn1-qc2Mok2-07hn1-qc2Mok1-07hn1-qc2Msr1-09hrn1-qb6Msr1-07hrn1-qb6 ... Show all

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