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Pioneer WYC009AMFI20 Service Manual

Wyc series single zone split 3d dc inverter+heat pump.
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Revision A: 1502250001, Content updated.
Model Numbers:   
WYC009AMFI20 
WYC012AMFI20 

Table of Contents

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9.
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
This service is only for service engineer to use.
WYC SERIES SINGLE ZONE SPLIT
3D DC INVERTER+ HEAT PUMP
SERVICE MANUAL
 
           
Digital 3D

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Table of Contents

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   Summary of Contents for Pioneer WYC009AMFI20

  • Page 1: Table Of Contents

    3D DC INVERTER+ HEAT PUMP Digital 3D SERVICE MANUAL Revision A: 1502250001, Content updated. Model Numbers:                  WYC009AMFI20  WYC012AMFI20  Table of Contents Precaution Part Names And Functions Dimension Refrigerant Cycle Diagram Printed Circuit Board Connector Wiring Diagram of...
  • Page 2 CONTENTS 1. Precaution ..............................1   1.1 Safety Precaution ........................1  1.2 Warning ............................1  2. Part Names And Functions ........................4   2.1 Model Names of Indoor/Outdoor units ..................4  2.2 Part names of Indoor/Outdoor units .................... 5  3. Dimension ..............................6   3.1 Indoor Unit ..........................
  • Page 3: Precaution

    Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1. Precaution condenser and evaporator.  For installation, always contact the 1.1 Safety Precaution dealer or an authorized service center.  To prevent injury to the user or other ...
  • Page 4 There is risk of electric shock or fire. product.  Stop operation and close the window It can avoid vibration of water leakage. in storm or hurricane. If possible, remove  Do not install the product where the the product from the window before the noise or hot air from the outdoor unit could hurricane arrives.
  • Page 5  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries.
  • Page 6: Part Names And Functions

    2. Part Names And Functions 2.1 Model Names of Indoor/Outdoor units Outdoor units Series Capacity Indoor units WC009AMFI20HLD YN009AMFI20RPD WC012AMFI20HLD YN012AMFI20RPD...
  • Page 7: Part Names Of Indoor/outdoor Units

    2.2 Part names of Indoor/Outdoor units...
  • Page 8: Dimension

    3. Dimension 3.1 Indoor Unit Model 800 mm 188 mm 275 mm WC009AMFI20HLD (31.5in) (7.4in) (10.8in) 800 mm 188 mm 275 mm WC012AMFI20HLD (31.5in) (7.4in) (10.8in)
  • Page 9 Dimension of installation L(mm) R(mm) H(mm) hole(mm) 100 mm 95 mm 45 mm ¢65 mm (3.9in) (3.7in) (1.8in) (2.6in)
  • Page 10: Outdoor Unit

    3.2 Outdoor Unit More than 30cm(11.8in) More than 60cm(23.6in) (Service space More than 30cm(11.8in) More than 60cm(23.6in) More than 70cm(27.6in) Note: The above drawing is only for reference. The appearance of your units may be different. Model 780mm 250mm 540mm 843mm 549mm 276mm...
  • Page 11: 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 12 For heat pump models: INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve CAPILIARY TUBE LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE HEAT (EVAPORATOR) T4 Ambient T1 Room temp. EXCHANGE temp. sensor sensor (CONDENSER) T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE Accumulator...
  • Page 13: Printed Circuit Board Connector Wiring Diagram Of Outdoor Unit

    5. Printed Circuit Board Connector Wiring Diagram of Outdoor unit...
  • Page 14: Installation Details

    1. Air purging with vacuum pump 6.3 Pipe length and the elevation Pipe size Models Liquid 3/8in 1/4in WYC009AMFI20 (Ф9.52mm) (Ф6.35mm) 1/2in 1/4in WYC012AMFI20 (Ф12.7mm) (Ф6.35mm) Standa Max.
  • Page 15: Adding The Refrigerant After Running The System For Many Years

    Front seated. Procedure: 2) Connect the low pressure gauge to the 3 1). Confirm that both the 2-way and 3-way way service valve access port.. valves are set to the closed position. 3) Connect the middle hose of the gauge 2).
  • Page 16: Procedure When Servicing The Indoor Unit Refrigeration Circuit

    1). 1st step; Connect the low pressure gauge 6.6 Procedure when servicing the indoor from the gauge manifold set to the 3 way unit refrigeration circuit. service valve (this is the blue hose on most sets) 1. Pumping down the system (isolating the 2nd step;...
  • Page 17: Evacuation After Servicing The Outdoor Unit Refrigeration Circuit

    because the outdoor unit can only store a and loosen it at the gauge manifold connection, certain amount of refrigerant, this is normal (the next open the 2 way valve 1/2 half of a turn (this amperage of the compressor will have to be will release the refrigerant that has been monitored in this case) Stop compressor when isolated in the outdoor unit) The refrigerant will...
  • Page 18 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). 3) Put the charging cylinder onto the electronic scale and record the weight. 4).
  • Page 19: Operation Characteristics

    7. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode 17℃~32℃ 0℃~30℃ 10℃~32℃ Room temperature (62℉~90℉) (32℉~86℉) (50℉~90℉) °C ~50 °C °F ~122 °F °C ~50 °C °C ~30 °C °C ~50 °C Outdoor temperature °F ~122 °F °F ~86 °F °F...
  • Page 20: 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 21: Main Protection

    8.3 Main Protection function. 8.3.7 Compressor preheating functions 8.3.1 Three minutes delay at restart for Preheating permitting condition: compressor When T4(outdoor ambient temperature)< Less than 1 minute delay for the 1 time 3°C(37.4°F), the preheating function will be stand-up and 3 minutes delay for others. activated.
  • Page 22: Operation Modes And Functions

    8.4 Operation Modes and Functions 8.4.2.2 Indoor fan running rules In cooling mode, indoor fan runs all the time 8.4.1 Fan mode and the speed can be selected as high, (1) Outdoor fan and compressor stop. medium, low and auto. (2) Temperature setting function is disabled, When the setting temp.
  • Page 23 8.4.3 Heating Mode Setting fan T1-Td℃ Actual fan speed speed 8.4.3.1 Compressor running rules H-(H-=H-G) When T1-Ts>-ΔT, the compressor will stop, H(=H) H+(H+=H+G) when T1-T <ΔT-1.5 时,the compressor will be M-(M-=M-Z) M(M=M) ΔT is the programmed parameter of M+(M+=M+Z) temperature compensation. L-(L-=L-D) When the AC run in mute mode,the compressor L(L=L)
  • Page 24 can’t be changed. The louver angle is the same as in cooling mode. 8.4.5.3 Low indoor room temperature protection In drying mode, if room temperature is lower than 10°C(50°F), the compressor will stop and Decrease not resume until room temperature exceeds 12°C(53.6°F).
  • Page 25 If the memorization condition is forced cooling restarts. mode, the unit will run in cooling mode for 30 minutes and turn to auto mode as 24°C(75.2°F) 8.4.8 8°C Heating(optional) setting temp. When the compressor is running, the indoor fan If AC is off before power off and AC is required motor will run without anti-cold air function.
  • Page 26 8.4.9 Point check function Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.
  • Page 27 Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1. All the displaying temperature is actual T2B,TP,TH, 1b,-1A value. Targeted 2. All the temperature is °C no matter what -19—99 -19—99 Frequency, kind of remote controller is used. A0,A1,…A9 100,101,…109 Actual 3.
  • Page 28: Troubleshooting

    9. Troubleshooting 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!) For other models, please 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 29: Indoor Unit Error Display

    9.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error Indoor / outdoor units communication error ☆ 2 times Zero-crossing signal detection error(only for ☆ 3 times MS12F-12CRDN1-MP0W, MS12F-18CRDN1-NC2W, MS12F-22CRDN1-MP5W) ☆...
  • Page 30: Outdoor Unit Error Display

    9.2 Outdoor unit error display LED2 LED1 Problems IU display (Green) (Red) standby for normal Operation normally IPM malfunction or IGBT over-strong current protection ☆ Over voltage or too low voltage protection Over voltage or too low voltage protection ☆ Inverter compressor drive error ☆...
  • Page 31: Diagnosis And Solution

    9.3 Diagnosis and Solution 9.3.1 EEPROM parameter error diagnosis and solution(E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback conditions from EEPROM chip. Supposed causes Installation mistake ● PCB faulty ● Trouble shooting: Power off , then restart the unit 2 minutes later.
  • Page 32 9.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions seconds and this condition happens four times continuously. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ●...
  • Page 33 Remark: Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit. The red pin of multimeter connects with L2 port while the black pin is for S port. When AC is normal running, the voltage will move alternately between -50V to 50V.
  • Page 34 9.3.3 Zero crossing detection error diagnosis and solution(E2)...
  • Page 35 9.3.4 Fan speed has been out of control diagnosis and solution(E3) E3/F5 Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, conditions the unit will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 36 Index 1: 1:Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.
  • Page 37 9.3.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) E4/E5/F1/F2/F3 Error Code Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, conditions the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 38 9.3.6 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 <Tcool-2 °C( Tcool-35.6 °F) does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC”...
  • Page 39 9.3.7 Overload current protection diagnosis and solution(F0) Error Code Malfunction decision An abnormal current rise is detected by checking the specified conditions current detection circuit. Supposed causes Power supply problems. ● System blockage ● PCB faulty ● Wiring mistake ● Compressor malfunction ●...
  • Page 40 9.3.8 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip conditions is abnormal, the display LED will show “P0” and AC will turn off. Supposed causes Wiring mistake ●...
  • Page 41 For example: Note: The photos below are only for reference, it’s may be not same totally with the ones on your side.
  • Page 44 9.3.9 Over voltage or too low voltage protection diagnosis and solution(P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 45 9.3.10 High temperature protection of compressor top diagnosis and solution(P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Power supply problems. ● System leakage or block ● PCB faulty ●...
  • Page 46 9.3.11 Inverter compressor drive error diagnosis and solution(P4) Error Code Malfunction decision An abnormal inverter compressor drive is detected by a special conditions detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Supposed causes Wiring mistake ●...
  • Page 47 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.
  • Page 48 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (°C--K) °C °F °C °F °C °F °C °F K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865...
  • Page 49 Appendix 2 Temperature Sensor Resistance Value Table for T5 (°C --K) °C °F °C °F °C °F °C °F K Ohm K Ohm K Ohm K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5...
  • Page 50 Appendix 3: 9ΔT ΔT °C °F °C °F °C °F °C °F °C °F 69.8 123.8 179.6 235.4 24.8 71.6 125.6 181.4 237.2 26.6 73.4 127.4 183.2 28.4 75.2 129.2 240.8 30.2 186.8 242.6 25.5 77.9 132.8 188.6 244.4 32.9 78.8 134.6 190.4...
  • Page 51 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN98D22UEZ ASM108D1UFZA DA130M1C-31FZ DA150S1C-20FZ DA250S2C-30MT Blue - Red Blue - 1.57Ω 1.81Ω 1.77Ω 0.95Ω 0.55Ω Black (20°C /68°F) (20°C /68°F) (20°C /68°F) (20°C /68°F) (20°C /68°F) Red - Blue...
  • Page 52 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. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
  • Page 53 5: Pressure On Service Port Cooling chart: °F °C (23.89) (29.44) (35) (40.56) (46.11) 70/59 10.1 75/63 10.7 80/67 11.2 °F °C (23.89) (29.44) (35) (40.56) (46.11) 70/59 75/63 80/67 °F °C (23.89) (29.44) (35) (40.56) (46.11) 70/59 0.82 0.78 0.81 0.86 1.01...
  • Page 54 Heating Chart: 57/53 47/43 37/33 27/23 17/13 °F (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) °C 30.3 28.5 25.3 22.8 20.8 32.5 30.0 26.6 25.4 23.3 33.8 31.5 27.8 26.3 24.9 57/53 47/43 37/33 27/23 17/13 °F (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) (-8.33/-10.56) °C 57/53 47/43...
  • Page 55: Disassembly Instructions

    10 Disassembly Instructions Note: This part is for reference, the photos may have slight difference with your machine. 10.1 Indoor unit Parts name Procedures Remarks Front panel Overview: How to remove the front panel. 1)Pull the below side of the panel toward you and remove screw of the Panel cover.
  • Page 56 Electrical How to remove the Room temp. parts electrical parts. sensor 1)Remove the front panel from procedure 1. 2)Pull out the room temp. sensor (T1). Remove the Evaporator coil two screws for the ground temp. sensor connection. Grounding screws 3)Remove the fixing screw.
  • Page 57 Evaporator How to remove the evaporator. 1)After remove the electrical parts from procedure 2, disassemble the pipe holder at the rear side of the unit. 2)Remove the screw on the evaporator at the fixed plate. One screws at the base bearing side 3)Remove the two screws on the evaporator at the...
  • Page 58 Fan and How to remove the fan motor motor. 1)Remove the front panel, electrical parts and evaporator following procedure 1-3. 2)Remove the three screws and remove the Three screws fixing board of fan motor. 3)Remove the fixing screw . Pull out the fan motor and fan ass’y from the side direction.
  • Page 59: Outdoor Unit

    10.2 Outdoor unit  MOB-09HFN1-MT0W, MOB-09HFN1-BT0W Part name Procedures Remarks Panel plate How to remove the panel Screws of top panel plate. Stop operation of the air conditioner and turn “OFF” the power breaker. Refer to the right side photos, find out the fixing Screws of front panel screws of the panels.
  • Page 60 Remove the screws of Screw of the front panel, including the top the fixing screws of motor panel holder and then remove the front panel. Screws of front panel Remove the screws of the right side plate and remove the right side plate.
  • Page 61 Fan ass’y How to remove the fan Electronic control box ass’y. Fan ass’y After remove the panel plate following procedure 1, remove the hex nut fixing the fan and then remove the fan. Reactor Compressor and liquid-gas separator Nut fixing the fan Unfix the hooks and then open the electronic control box cover.
  • Page 62 Disconnect the connector for fan motor from the electronic control board. Fan motor connector Remove the four fixing screws of the fan motor. 5) Then remove the fan Four motor. screws Electrical How to remove the parts electrical parts. After finish work of item 1 and item 2, remove the three connectors for the compressor and...
  • Page 63 Pull out the two black Two black wires of four way valve wires connected with the four way valve. Pull out connectors of the compressor top temp. sensor, condenser coil temp. sensor(T3),outdoor ambient temp. sensor(T4) and discharge temp. sensor(T5). Four connectors of temp. sensors. Remove the ground wires .
  • Page 64 Four-way How to remove the The picture of four-way valve may be different from valve four-way valve. the one on your side. Perform work of item 1,2,3. Recover refrigerant from the refrigerant circuit. Remove the screw of the coil and then remove the coil.
  • Page 65  Part name Procedures Remarks Panel plate How to remove the panel Screws of top panel plate. 1)Stop operation of the air conditioner and turn “OFF” the power breaker. 2)Refer to the right side photos, find out the fixing screws of the panels. Screws of front panel Screw of top panel...
  • Page 66 Screw of 4)Remove the screws of top panel the front panel, including the fixing screws of motor holder and then remove the front panel. Screws of front panel 5)Remove the screws of Screws of left plate the right side plate and remove the right side plate.
  • Page 67 2)Unfix the hooks and then open the electronic control box cover. 3)Disconnect the connector for fan motor from the electronic control board. Fan motor connector 4)Remove the four fixing screws of the fan motor. 5)Then remove the fan motor. Four screws...
  • Page 68 Electrical How to remove the parts electrical parts. Reactor connector 1)After finish work of item 1 and item 2, remove the three connectors for the compressor and electrical heaters. 2)Release the connector of the reactor. Compressor connector connector Two blue wires of four way valve 3)Pull out the two blue wires connected with the four way valve.
  • Page 69 5)Remove the ground wires . 6)Remove the power supply wires(L1,L2,S). 7)Then remove the electronic control box. Four-way How to remove the valve four-way valve. The picture of four-way valve may be different from 1)Perform work of item the one on your side. 1,2,3.
  • Page 70 Compressor How to remove the compressor. 1) After perform work of item1,2,3. 2) Remove the discharge pipe and suction Discharge pipe with a burner. pipe and 3) Remove the hex nuts suction and washers fixing the pipe compressor on bottom plate.

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Wyc012amfi20

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