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9.3.11 Inverter compressor drive error diagnosis and solution(P4)

Error Code

P4

Malfunction decision
conditions

An abnormal inverter compressor drive is detected by a special
detection circuit, including communication signal detection,
voltage detection, compressor rotation speed signal detection
and so on.

Supposed causes

●

Wiring mistake

●

IPM malfunction

●

Outdoor fan ass’y faulty

●

Compressor malfunction

●

Outdoor PCB faulty

Trouble shooting:

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Содержание WYC009AMFI20

Страница 1: ... 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 ma...

Страница 2: ...e length and the elevation 12 6 4 Installation for the first time 12 6 5 Adding the refrigerant after running the system for many years 13 6 6 Procedure when servicing the indoor unit refrigeration circuit 14 6 7 Evacuation after servicing the outdoor unit refrigeration circuit 15 7 Operation Characteristics 17 8 Electronic Function 18 8 1 Abbreviation 18 8 2 Display function 18 8 3 Main Protectio...

Страница 3: ...ful of the case edges and the fins on the 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 Do not let the a...

Страница 4: ... away properly A bad connection may cause water leakage Keep level even when installing the product 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 Do not install the product where it will be exposed to...

Страница 5: ... of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode If the liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked ...

Страница 6: ...4 2 Part Names And Functions 2 1 Model Names of Indoor Outdoor units Series Capacity Indoor units Outdoor units WYC 9k WC009AMFI20HLD YN009AMFI20RPD 12k WC012AMFI20HLD YN012AMFI20RPD ...

Страница 7: ...5 2 2 Part names of Indoor Outdoor units ...

Страница 8: ...6 3 Dimension 3 1 Indoor Unit W D H Model W D H WC009AMFI20HLD 800 mm 31 5in 188 mm 7 4in 275 mm 10 8in WC012AMFI20HLD 800 mm 31 5in 188 mm 7 4in 275 mm 10 8in ...

Страница 9: ...7 L mm R mm H mm Dimension of installation hole mm 100 mm 3 9in 95 mm 3 7in 45 mm 1 8in 65 mm 2 6in ...

Страница 10: ...or obstacles More than 30cm 11 8in Note The above drawing is only for reference The appearance of your units may be different Model W D H W1 A B YN009AMFI20RPD 780mm 30 7in 250mm 9 8in 540mm 21 3in 843mm 33 2in 549mm 21 6in 276mm 10 9in YN012AMFI20RPD 810mm 31 9in 310mm 12 2in 558mm 22 0n 874mm 34 4in 549mm 21 6in 325mm 12 8in ...

Страница 11: ...9 4 Refrigerant Cycle Diagram For cooling only models INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR CAPILIARY TUBE ...

Страница 12: ...ANGE CONDENSER Compressor 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor T1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor INDOOR OUTDOOR Electronic expansion valve CAPILIARY TUBE Accumulator CAPILIARY TUBE ...

Страница 13: ...11 5 Printed Circuit Board Connector Wiring Diagram of Outdoor unit ...

Страница 14: ...FI20 7 5m 24 6ft 10m 32 8ft 25m 82 0ft 15g m 0 16oz ft WYC012AMFI20 7 5m 24 6ft 10m 32 8ft 25m 82 0ft 15g m 0 16oz ft 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 Water ...

Страница 15: ...lve can now be opened for the system operation 2 Air purging by refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 With a container of refrigerant and a gauge manifold set connect the low pressure gauge hose to the 3 way valve service port and a charging cylinder to the service port of the 3 way valve 3 Open the valve on the refrigerant container ...

Страница 16: ...nect the hose from the manifold set also disconnect the hose from the 3 way valve and replace and torque all caps 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 13 27 ft lbs Always leak check after servicing the refrigerant system 6 6 Procedure when servicing the indoor unit refrigeration circuit 1 Pumping down the system iso...

Страница 17: ...f a turn this will release the refrigerant that has been isolated in the outdoor unit The refrigerant will travel thru the small refrigerant line and evaporator coil in the indoor unit and back out the low pressure hose that has been loosened let the refrigerant sweep for about 50 seconds this will push and remove any air moisture and noncodensables from the refrigeration circuit After 50 seconds ...

Страница 18: ...ge 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 3 Put the charging cylinder onto the electronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be ...

Страница 19: ...ON 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 Please set the vertical air flow louver to its maximum angle vertically t...

Страница 20: ...lamp illuminates when Clean Air feature is activated DEFROST indication lamp For cooling heating models only Lights up when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation OPERATION indication lamp This lamp illuminates when the air conditioner is in operation TIMER indication lamp Lights up during Timer operation Temperatu...

Страница 21: ...the louver will be active immediately and the indoor fan will open 10s later If the unit runs in heating mode the indoor fan will be also controlled by anti cold wind function 8 3 7 Compressor preheating functions Preheating permitting condition When T4 outdoor ambient temperature 3 C 37 4 F the preheating function will be activated 8 3 8 Sensor protection at open circuit and breaking disconnectio...

Страница 22: ...it will be run at different fan speed according to T4 For different outdoor units the fan speeds are different T 4 A A B C D E 8 4 2 2 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 When the setting temp is reached if the compressor stop running indoor fan motor will run in Minimum speed or setting speed The indoor fa...

Страница 23: ... anti cold air function will start and indoor fan motor will run at low speed the speed can t be changed when the temp is lower than setting value the indoor fan motor will stop When the indoor temp reaches the setting temp the compressor will stop the indoor fan motor will run at the minimum speed or setting speed The anti cold air function is valid The indoor fan is controlled as below Setting f...

Страница 24: ...ection condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode 8 4 5 5 The outdoor fan operates the same as in cooling mode 8 4 6 Forced operation function 8 4 6 1 Enter forced operation function When the machine is off pressing the touch button will carry the machine to forced auto mode If pressing the button once again within 5 secon...

Страница 25: ...C is off before power off and AC is required to start up now the compressor will have 1 minute delay when power on Other conditions the compressor will have 3 minutes delay when restarts 8 4 8 8 C Heating optional When the compressor is running the indoor fan motor will run without anti cold air function When the compressor is off the indoor fan motor is off ...

Страница 26: ...iry information Displaying code Meaning T1 T1 T1 temp T2 T2 T2 temp T3 T3 T3 temp T4 T4 T4 temp T2B Tb T2B temp TP TP TP temp TH TH TH temp Targeted Frequency FT Targeted Frequency Actual Frequency Fr Actual Frequency Indoor fan speed IF Indoor fan speed Outdoor fan speed OF Outdoor fan speed EXV opening angle LA EXV opening angle Compressor continuous running time CT Compressor continuous running...

Страница 27: ...31 139 E0 E1 E9 140 141 149 F0 F1 F9 150 151 159 Indoor fan speed Outdoor fan speed 0 OFF 1 2 3 4 Low speed Medium speed High speed Turbo For some big capacity motors 14 FF Actual fan speed Display value turns to decimal value and then multiply 10 The unit is RPM For some small capacity motors display value is from 14 FF hexadecimal the corresponding fan speed range is from 200 2550RPM EXV opening...

Страница 28: ... 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 Note The picture above is only for reference The plug of your side may be different ...

Страница 29: ...cuit 7 times X EC Refrigerant leakage detection 1 times O F0 Overload current protection 2 times O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit 3 times O F2 Condenser coil temperature sensor T3 open circuit or short circuit 4 times O F3 Compressor discharge temperature sensor T5 open circuit or short circuit 5 times O F4 Outdoor unit EEPROM parameter error 6 times O F5 Ou...

Страница 30: ...2 Operation normally X O 3 IPM malfunction or IGBT over strong current protection X P0 4 Over voltage or too low voltage protection O O P1 5 Over voltage or too low voltage protection O P1 6 Inverter compressor drive error X P4 7 Inverter compressor drive error O P4 8 Inverter compressor drive error P4 ...

Страница 31: ...stallation mistake PCB faulty Trouble shooting Yes Replace the indoor outdoor main PCB Power off then restart the unit 2 minutes later EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage For the location of EEPROM chip please refer to the below photos Indoor PCB Outdoor PCB 18k model Note The two photos above are only for reference it s may be not same to...

Страница 32: ...lution E1 Error Code E1 Malfunction decision conditions Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens four times continuously Supposed causes Wiring mistake Indoor or outdoor PCB faulty Trouble shooting ...

Страница 33: ...ll move alternately between 50V to 50V If the outdoor unit has malfunction the voltage will move alternately with positive value While if the indoor unit has malfunction the voltage will be a certain value Remark Use a multimeter to test the resistance of the reactor which does not connect with capacitor The normal value should be around zero ohm Otherwise the reactor must have malfunction and nee...

Страница 34: ...32 9 3 3 Zero crossing detection error diagnosis and solution E2 ...

Страница 35: ...ion E3 Error Code E3 F5 Malfunction decision conditions When indoor fan speed keeps too low 300RPM for certain time the unit will stop and the LED will display the failure Supposed causes Wiring mistake Fan ass y faulty Fan motor faulty PCB faulty Trouble shooting ...

Страница 36: ...ack GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V 2 Outdoor DC Fan Motor control chip is in outdoor PCB Power on and check if the fan can run normally if the fan can run normally the PCB must has problems and need to be replaced If the fan can t run normally measure the resistance of each two pins If the resistance is not equal to each other the fan motor must have problems an...

Страница 37: ...re sensor diagnosis and solution E5 Error Code E4 E5 F1 F2 F3 Malfunction decision conditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Supposed causes Wiring mistake Sensor faulty Trouble shooting ...

Страница 38: ...mpressor just starts 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 and AC will turn off Supposed causes T2 sensor faulty Indoor PCB faulty System problems such as leakage or blocking Trouble shooting ...

Страница 39: ...d solution F0 Error Code F0 Malfunction decision conditions An abnormal current rise is detected by checking the specified current detection circuit Supposed causes Power supply problems System blockage PCB faulty Wiring mistake Compressor malfunction ...

Страница 40: ... Code P0 Malfunction decision conditions When the voltage signal that IPM send to compressor drive chip is abnormal the display LED will show P0 and AC will turn off Supposed causes Wiring mistake IPM malfunction Outdoor fan ass y faulty Compressor malfunction Outdoor PCB faulty Trouble shooting ...

Страница 41: ...39 For example P U P V Note The photos below are only for reference it s may be not same totally with the ones on your side ...

Страница 42: ...40 P W N U ...

Страница 43: ...41 N V N W ...

Страница 44: ...on decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit Supposed causes Power supply problems System leakage or block PCB faulty Trouble shooting Remark Measure the DC voltage between P and N port The normal value should be around 310V P N ...

Страница 45: ...compressor top diagnosis and solution P2 Error Code P2 Malfunction decision conditions If the sampling voltage is not 5V the LED will display the failure Supposed causes Power supply problems System leakage or block PCB faulty Trouble shooting ...

Страница 46: ...bnormal inverter compressor drive is detected by a special detection circuit including communication signal detection voltage detection compressor rotation speed signal detection and so on Supposed causes Wiring mistake IPM malfunction Outdoor fan ass y faulty Compressor malfunction Outdoor PCB faulty Trouble shooting ...

Страница 47: ... 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 ...

Страница 48: ... 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 28 3459 44 111 4 3873...

Страница 49: ... 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246 2 174 0 32 180 9 40 104 29 15 80 176 6 859 120 248 2 117 1 34 171 9 41 106 28 81 178 6 641 121 250 2 061 2 36 163 3 42 108 26 9 82 180 6 43 122 252 2 007 3 37 155 2 43 109 25 86 83 181 6 228 123 253...

Страница 50: ... 125 257 4 39 2 33 91 4 64 147 2 95 203 126 258 8 4 5 40 1 34 93 2 65 149 96 204 8 127 260 6 5 41 35 95 66 150 8 97 206 6 128 262 4 6 42 8 36 96 8 67 152 6 98 208 4 129 264 2 7 44 6 37 98 6 68 154 4 99 210 2 130 266 8 46 4 38 100 4 69 156 2 100 212 131 267 8 9 48 2 39 102 2 70 158 101 213 8 132 269 6 10 50 40 104 71 159 8 102 215 6 133 271 4 11 51 8 41 105 8 72 161 6 103 217 4 134 273 2 12 53 6 42...

Страница 51: ...ce value of each winding by using the tester Position Resistance Value ASN98D22UEZ ASM108D1UFZA DA130M1C 31FZ DA150S1C 20FZ DA250S2C 30MT Blue Red 1 57Ω 20 C 68 F 1 81Ω 20 C 68 F 1 77Ω 20 C 68 F 0 95Ω 20 C 68 F 0 55Ω 20 C 68 F Blue Black Red Blue ...

Страница 52: ...lytic 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 Black Several MΩ Red Black Several MΩ P N U N U V V W W Red ...

Страница 53: ...C ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 PSI 70 59 119 113 117 125 147 PSI 75 63 124 120 126 132 155 PSI 80 67 135 129 132 140 162 F C ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 MPA 70 59 0 82 0 78 0 81 0 86 1 01 MPA 75 63 0 86 0 83 0 87 0 91 1 07 MPA 80 67 0 93 0 89 0 91 0 96 1 12 0 0 2 0 4 0 6 0 8 0 10 0 12 0 75 23 89 85 29 44 95 35 105 40 56 115 46 11 70 59 75 63 80 67 ...

Страница 54: ...11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 PSI 55 439 413 367 330 302 PSI 65 471 435 386 368 339 PSI 75 489 457 403 381 362 F C ODT IDT 57 53 13 89 11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 MPA 55 3 03 2 85 2 53 2 28 2 08 MPA 65 3 25 3 00 2 66 2 54 2 33 MPA 75 3 38 3 15 2 78 2 63 2 49 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 57 53 13 89 11 67 47 43 8 33 6 11 37 33...

Страница 55: ... remove the front panel 1 Pull the below side of the panel toward you and remove screw of the cover 2 Release the connector of the display ass y 3 Release the two clips and then remove the panel 4 Remove the filter and the horizontal louver 5 Remove the four screws and then remove the panel ass y Overview Connector for display ass y One screw fixing the cover Clip Panel Filter Four screws ...

Страница 56: ...ve the fixing screw 4 Pull out the coil temp sensor 5 From the side direction open the electronic control box cover fixing by clips Pull out the fan motor connector and swing motor connector Then remove the electronic control box Fixing screw Swing motor Fan motor connector and swing motor Clip for electronic control box cover Grounding screws Evaporator coil temp sensor Room temp sensor ...

Страница 57: ...rocedure 2 disassemble the pipe holder at the rear side of the unit 2 Remove the screw on the evaporator at the fixed plate 3 Remove the two screws on the evaporator at the base bearing side 4 Then pull out the evaporator One screws at the base bearing side Two screws at the fixed plates ...

Страница 58: ...move the front panel electrical parts and evaporator following procedure 1 3 2 Remove the three screws and remove the fixing board of fan motor 3 Remove the fixing screw Pull out the fan motor and fan ass y from the side direction Three screws One screw ...

Страница 59: ...air conditioner and turn OFF the power breaker 2 Refer to the right side photos find out the fixing screws of the panels 3 Remove the screws of top panel and remove the top panel Screws of water connector on right side plate Screws of front panel Screws of top panel Screws of front panel Screws of big handle on right side plate Screw of right side plate ...

Страница 60: ...luding the fixing screws of motor holder and then remove the front panel 5 Remove the screws of the right side plate and remove the right side plate Screw of the top panel Screws of right rear plate Screws of front panel Screws of the motor holder ...

Страница 61: ...e the panel plate following procedure 1 remove the hex nut fixing the fan and then remove the fan 2 Unfix the hooks and then open the electronic control box cover Fan ass y Electronic control box Reactor Compressor and liquid gas separator Nut fixing the fan ...

Страница 62: ...he fan motor 5 Then remove the fan motor Fan motor connector 3 Electrical parts How to remove the electrical parts 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 Reactor connector Four screws Compressor connector ...

Страница 63: ... the compressor top temp sensor condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 5 Remove the ground wires 6 Remove the power supply wires L1 L2 S 7 Then remove the electronic control box Four connectors of temp sensors Two black wires of four way valve ...

Страница 64: ...ass y can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 1 After perform work of item1 2 3 2 Remove the discharge pipe and suction pipe with a burner 3 Remove the hex nuts and washers fixing the compressor on bottom plate 4 Lift the compressor from the base pan assembly Discharge pipe and suction pipe Four way valve Nut...

Страница 65: ...aker 2 Refer to the right side photos find out the fixing screws of the panels 3 Remove the screws of top panel and remove the top panel Screw of the top panel Screws of water connector on right side plate Screws of front panel Screws of top panel Screw of top panel Screws of big handle on right side plate Screws of rear net Screws of left plate ...

Страница 66: ... and remove the right side plate 2 Fan ass y How to remove the fan ass y 1 After remove the panel plate following procedure 1 remove the hex nut fixing the fan and then remove the fan Screw of top panel Screws of the motor holder Reactor Compressor and liquid gas separator Nut fixing the fan Screws of left plate Screws of front panel Electronic control box Fan ...

Страница 67: ...then open the electronic control box cover 3 Disconnect the connector for fan motor from the electronic control board 4 Remove the four fixing screws of the fan motor 5 Then remove the fan motor Four screws Fan motor connector ...

Страница 68: ...ers 2 Release the connector of the reactor 3 Pull out the two blue wires connected with the four way valve 4 Pull out connectors of the compressor top temp sensor condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 Reactor connector Four connectors of temp sensors Compressor connector connector Two blue wires of four way valve ...

Страница 69: ... work of item 1 2 3 2 Recover refrigerant from the refrigerant circuit 3 Remove the screw of the coil and then remove the coil 4 Detach the welded parts of four way valve and pipe 5 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side Four way valve Coil of four way valve fixing by one screw Welded parts ...

Страница 70: ...perform work of item1 2 3 2 Remove the discharge pipe and suction pipe with a burner 3 Remove the hex nuts and washers fixing the compressor on bottom plate 4 Lift the compressor from the base pan assembly Discharge pipe and suction pipe Nuts of compress ...

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