MDV MDSF-07HRN1 Service Manual
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MDV MDSF-07HRN1 Service Manual

Fairwind on-off series
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FAIRWIND ON-OFF SERIES
Service Manual 2014

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Summary of Contents for MDV MDSF-07HRN1

  • Page 1 FAIRWIND ON-OFF SERIES Service Manual 2014...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3   1.1 Safety Precaution ........................3  1.2 Warning ............................3  2. Function ................................ 7   3. Dimension ..............................9   3.1 Indoor Unit ........................... 9  3.2 Outdoor Unit ..........................14  4. Refrigerant Cycle Diagram ........................16   5.

  • 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

    3. Function Model MDSF-07HRN1 MDSF-09HRN1 Indoor MDSF-07HRN1 MDSF-09HRN1 Outdoor MDOF-07HN1 MDOF-09HN1 Power supply Ph-V-Hz 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph Capacity Btu/h 7500 9000 Input Cooling Rated current 3,21 3,21 Capacity Btu/h 8000 9500 Input Heating Rated current 3,66 3,62 Moisture Removal Max.
  • Page 8 Model MDSF-12HRN1 MDSF-18HRN1 Indoor MDSF-12HRN1 MDSF-18HRN1 Outdoor MDOF-12HN1 MDOF-18HN1 Power supply Ph-V-Hz 220-240V~ 50Hz, 1Ph 220-240V~ 50Hz, 1Ph Capacity Btu/h 11500 18000 Input 1050 1640 Cooling Rated current 3.21 3,21 Capacity Btu/h 12000 19000 Input 1540 Heating Rated current 3.61 3,62 Moisture Removal Max.
  • Page 9 Model MDSF-24HRN1 Indoor MDSF-24HRN1 Outdoor MDOF-24HN1 Power supply Ph-V-Hz 220-240V~ 50Hz, 1Ph Capacity Btu/h 24000 Input 2330 Cooling Rated current 10,8 3,02 Capacity Btu/h 25000 Input 2140 Heating Rated current 3,42 Moisture Removal Max. input consumption 4000 Max. current 20.0 Starting current Model PA270G2CS-4MU1...
  • Page 10 Model MDSF-28HRN1 Indoor MDSF-28HRN1 Outdoor MDOF-28HN1 Power supply Ph-V-Hz 220-240V- 50Hz, 1Ph Capacity Btu/h 28000 Input 2920 Cooling Rated current 12.4 2,81 Capacity Btu/h 30000 Input 2735 Heating Rated current 11.5 3,21 Max. input consumption 4200 Max. current Starting current 74.5 Model PA331X3CS-4MU1...

  • Page 11: Dimension

    3. Dimension 3.1 Indoor Unit Model MDSF-07HRN1 MDSF-09HRN1 MDSF-12HRN1 MDSF-18HRN1 MDSF-24HRN1 1045 MDSF-28HRN1 1045...
  • Page 12 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) MSDF-07HRN1 MSDF-09HRN1 MDSF-12HRN1 MDSF-18HRN1 ￠65 MDSF-24HRN1 MDSF-28HRN1...

  • Page 13: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space More than 30cm More than 60cm More than 200cm Model MDOF-07HN1 MDOF-09HN1 MDOF-12HN1 MDOF-18HN1 MDOF-24(28)HN1...

  • Page 14: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram For heat pump models: INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) T1 Room temp. sensor T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR...

  • Page 15: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit MDSF-07HRN1/MDSF-09HRN1/MDSF-12HRN1/MDSF-18HRN1 MDSF-24HRN1/MDSF-28HRN1 MDSF-24HRN1-v/MDSF-28HRN1-v SWING MOTOR FAN CAPACITOR BOARD PC1_1 PC2_1 1 2 3 4 5 1 2 3 4 5 WHITE WHITE CN_N3 1 2 3 4 5 1 2 3 4 5 CN_ION...

  • Page 16: Outdoor Unit

    5.1 Indoor Unit MDSF-07HRN1-v/MDSF-09HRN1-v/MDSF-12HRN1-v/MDSF-18HRN1-v 5.2 Outdoor Unit MDOF-07HN1/MDOF-09HN1/MDOF-12HN1 MDOF-18HN1...
  • Page 17 MDOF-24HN1 FAN2 VALVE BLUE O.L.P 3(5) 4(6) WHITE (OR BLACK) BLACK BLUE BLUE CODE PART NAME COMP UNIT1 OUTDOOR CONTROL PCB CAP2 TRANS1 COMP COMPRESSOR BLACK CAP1 COMPRESSOR RUN CAPACITOR BLUE CAP2 OUTDOOR FAN CAPACITOR RT3 XP1 XS1 FAN2 OUTDOOR FAN CAP1 TERMINAL BLACK...
  • Page 18 MDOF-24HN1-v TEMPERATURE SENSOR OUTDOOR FAN REVERSING VALVE AC CONTACTOR BLUE O.L.P LOW TEMPERATURE COOLING SYSTEM WHITE CAP2 BLACK BLACK BLUE BLUE BLACK COMPRESSOR BLUE RT 3 SENSOR BLUE CAP1 BLACK FUSE CN11 BLACK DEFROSTING OPTION BLUE THERMOSTAT CN10 BLACK BLACK BLACK CURRENT I N DUCTOR PTCR...

  • Page 19: 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) >3 and ≤6...

  • Page 20: Pipe Length And The Elevation

    The pipe length and refrigerant amount: Standard Max. Max. Additional Pipe size Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) 3/8’’ 1/4’’ MDSF-07HRN1+MDOF-07HN1 (Ф9.52) (Ф6.35) 3/8’’ 1/4’’ MDSF-09HRN1+MDOF-09HN1 (Ф9.52) (Ф6.35) 1/2’’ 1/4’’ MDSF-12HRN1+MDOF-12HN1 (Ф12.7) (Ф6.35) 1/2’’ 1/4’’ MDSF-18HRN1+MDOF-18HN1 (Ф12.7) (Ф6.35)

  • Page 21: Operation Characteristics

    7. Operation Characteristics 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. 2. The room relative humidity should be less than 80%. If the air conditioner operates beyond this figure, the surface of the air conditioner may attract condensation.

  • Page 22: Main Protection

    8.3 Main Protection 8.3.1 Time Delay at restart for compressor. 8.3.2 Sensor protection at open circuit and breaking disconnection. 8.3.3 Zero crossing detection error protection If AC can not detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure.

  • Page 23: 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 the same as in cooling mode. (5) Auto fan: High Medium...
  • Page 24 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 and auto. The auto fan: 8.4.2.4 Low evaporator coil temperature T2 protection When the evaporator coil temp.T2 keeps lower than TE5 for 5 minutes, the compressor and outdoor fan will shut off.
  • Page 25 8.4.3.2 Outdoor fan running rules: The 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. 8.4.3.3 Indoor fan running rules: Auto fan action: When T1-Ts>2℃, the indoor fan will run at low speed.
  • Page 26 1.2 If the fan speed and the evaporator coil temp.T2 meet the below issues: ℃ High speed ＜43℃ Medium speed ＜46℃ Low speed ＜48℃ 1.3 After the compressor keeps running 8 minutes, ∆T′ max－∆T′ ≥6℃（∆T=T2-T1） 1.4 After the compressor keeps running 8 minutes, if -5℃<T1<45℃ and -5℃<T2<45℃, AC will detect the △T.
  • Page 27  Defrosting action： Compressor 4-way valve Outdoor fan Indoor fan Indoor fan breeze(10s) DF-5 DF-5 Setting defrosting time For 24k  Condition of defrosting: AC will enter defrosting mode if any of the following items is satisfied. (1) If T3<TC1 and the compressor keeps running over 45 minutes. Meanwhile T3＜TC3 for 3minutes (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 28 8.4.3.5 High evaporator coil temp.T2 protection: 8.4.4 Auto-mode This mode 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).
  • Page 29 Forced cooling mode: The compressor and outdoor fan keep running and the indoor fan runs at low speed. After running for 30 minutes, AC will turn to auto mode with 24℃ setting temperature. Forced auto mode: The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature. When AC receives signals, such as switch on, switch off, timer on, timer off, mode setting, fan ...
  • Page 30 8.4.9 Auto-Restart function The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure. The unit will resume the previous operation setting (not including swing function) automatically after 3 minutes when power returns.

  • Page 31: Troubleshooting

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

  • Page 32: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 33 9.2.2 Zero crossing detection error diagnosis and solution 9.2.3 Indoor fan speed has been out of control diagnosis and solution...
  • Page 34 Index 1: 1:Indoor AC Fan Motor Measure the resistance value of each winding by using the tester. For the resistance value of the motor, please contact the technical engineer. Index2: 1: Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2.
  • Page 35 9.2.5 Refrigerant Leakage Detection diagnosis and solution 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 36 9.2.6 Indoor / outdoor units communication error diagnosis and solution...
  • Page 37 Main parts check 1.Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. 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.

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Mdsf-09hrn1Mdof-07hn1Mdof-09hn1Mdsf-12hrn1Mdsf-18hrn1Mdof-12hn1 ... Show all

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