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NATURE INVERTER

SERVICE MANUAL

PIN413C2V31

PIN519C2V31

PIN624C2V31

INVERTER MINI SPLIT SYSTEM

WARNING



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.

Содержание PIN413C2V31

Страница 1: ...echnician 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 ...

Страница 2: ...2 Connecting the cables 17 7 3 Pipe length and the elevation 17 7 4 Installation for the first time 18 7 5 Adding the refrigerant after running the system for many years 19 7 6 Re installation while the indoor unit need to be repaired 19 7 7 Re installation while the outdoor unit need to be repaired 20 8 Operation Characteristics 22 9 Electronic Function 23 9 1 Abbreviation 23 9 2 Display function...

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: ... Part Names And Functions 2 1 Model Names of Indoor Outdoor units Series Capacity Indoor units Outdoor units 12k PIN413C2V31 I PIN413C2V31 O 18k PIN519C2V31 I PIN519C2V31 O 24k PIN624C2V31 I PIN624C2V31 O ...

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

Страница 8: ...F Filter O Bio Filter O Golden Fin O Cold Catalyst Filter Compressor Crankcase Heater standard for 16k 21k Self Clean O Follow Me O 8 Degree Heating O Heat Compensation O Self diag Function PTC Heating Belt O Filter Louver Position Memory Function Refrigerant Leakage Detect O optional function ...

Страница 9: ...ements Self Clean When this function is activated firstly the indoor unit operates as Fan only mode with low fan speed during this period the condensed water will take some dust on evaporator fins away After that the unit turns to heating operation with low fan speed which dries the inside of indoor unit Finally it turns to fan only mode and blows away the wet air The whole process cleans the inte...

Страница 10: ... 3 Dimension 3 1 Indoor Unit W D H Model W D H PIN413C2V31 I 770mm 30 3in 188mm 7 4in 255mm 10 0in PIN519C2V31 I 905mm 35 6in 198mm 7 8in 275mm 10 8in PIN624C2V31 I 1030mm 40 6in 218mm 8 6in 315mm 12 4in ...

Страница 11: ...llation hole mm PIN413C2V31 I 95mm 3 7in 170mm 6 7in 45mm 1 8in Φ65mm 2 56in PIN519C2V31 I 80mm 3 1in 100mm 3 9in 45mm 1 8in Model R mm L mm H mm Dimension of installation hole mm PIN624C2V31 I 163mm 6 4in 293mm 11 5in 45mm 1 8in Φ65mm 2 56in H L R ...

Страница 12: ... The above drawing is only for reference The appearance of your units may be different Model W H D W1 A B PIN413C2V31 O 780 30 7in 250 9 8in 540 21 3in 843 33 2in 549 21 6in 276 10 9in PIN519C2V31 O 760mm 29 9in 285mm 11 2in 590mm 23 2in 823mm 32 4in 530mm 20 9in 290mm 11 4in PIN624C2V31 O 845mm 33 3in 320mm 12 6in 700mm 27 6in 908mm 35 7in 560mm 22 0in 335mm 13 2in ...

Страница 13: ...11 5 Refrigerant Cycle Diagram For cooling only models INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR CAPILIARY TUBE ...

Страница 14: ...12 6 Wiring Diagram 6 1 Indoor Unit PIN413C2V31 I PIN519C2V31 I ...

Страница 15: ...13 PIN624C2V31 IW ...

Страница 16: ...14 6 2 Outdoor Unit PIN413C2V31 O PIN519C2V31 O ...

Страница 17: ...15 PIN624C2V31 O For PIN413C2V31 O ...

Страница 18: ...16 For PIN519C2V31 O For PIN624C2V31 O ...

Страница 19: ...d the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 7 3 Pipe length and the elevation Models Pipe size Gas Liquid PIN413C2V31 I PIN413C2V31 O 3 8in Ф9 52mm 1 4in Ф6 35mm PIN519C2V31 I PIN519C2V31 O 1 2in Ф12 7mm 1 4in Ф6 35mm PIN624C2...

Страница 20: ... the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound meter indicates 0 1Mpa 14 5Psi If the meter does not indicate 0 1Mpa 14 5Psi after pumping 30 minutes it should be pumped 20 minutes more If the pressure can t achieve 0 1Mpa 14 5Psi after pumping 50 minutes please check if there are some leakage points Fully close the handle L...

Страница 21: ... air from the charge 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 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 6 When the ele...

Страница 22: ...ir use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant 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 3Mpa 43 5Psi to 0 5 Mpa 72 5Psi 6 Disconnect the charge set and the chargin...

Страница 23: ...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 charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the...

Страница 24: ...e 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 to the floor and set HIGH fan mode 3 The optim...

Страница 25: ...Defrost Indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode only for heat pump Run indicator Flash at 0 5Hz when the unit is standby Illuminate when the unit is turned on Timer indicator This indicator illuminates when TIMER is set ON OFF Temperature indicator Displays the temperature settin...

Страница 26: ...de the indoor fan will be also controlled by anti cold wind function 9 3 7 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature 3 and the machine connects to power supply newly or if T4 3 and compressor has stopped for over 3 hours the compressor heating cable will work Preheating mode A weak current flow through the coil of compressor from the wiring t...

Страница 27: ...or operation frequency If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7 minutes according to the outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 5 1 0 A B C D E F G H While the zones of A B C are corresponding to diffe...

Страница 28: ...de acts as follow 4 3 High Low 1 Medium 1 5 9 4 3 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 ΔT ΔT T1 Ts ΔT T1 Ts Running mode ΔT 1 Cooling 1 ΔT 1 Fan only ΔT 1 Heating Indoor fan will run at auto fan of the relevant mode The louver operates same...

Страница 29: ...hing the setting time 9 4 6 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 9 4 6 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 time 9 4 6 6 The timer function will not change the AC curren...

Страница 30: ...ting not including swing function automatically after 3 minutes when power returns If the memorization condition is forced cooling mode the unit will run in cooling mode for 30 minutes and turn to auto mode as 24 setting temp If AC 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 del...

Страница 31: ... 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 32: ...s X E5 Evaporator coil temperature sensor T2 open circuit or short circuit 7 times X EC Refrigerant leakage detection 2 times O F1 Outdoor 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 ...

Страница 33: ...413C2V31 O There s a LED light on the outdoor PCB which is blue color After power on it will be slow flash 0 2Hz when the unit is in standby and quick flash 2 5Hz if the unit has some problems it will be solid light when the unit is running ...

Страница 34: ...ight and for the PCB POWER display LED 2 is a yellow light After power on it will be slow flash 0 2Hz when the unit is in standby and quick flash 2 5Hz if the unit has some problems LED 4 green and LED3 red are two lights controlled by the compressor drive chip Below are meanings for those lights LED3 red LED4 green LED2 yellow LED1 red ...

Страница 35: ...ction 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 O light X off 2 5Hz flash PIN624C2V31 O There s a LED light on the outdoor PCB which is blue color After power on it will be slow flash 0 2Hz when the unit is in standby and quick flash 2 5Hz if the unit has some problems ...

Страница 36: ...ce the main PCB directly Otherwise check whether the EEPROM chip plugged in main PCB well Yes No Yes Correct the connection Replace the main PCB Shut off the power supply and turn it on 5 seconds later Is it still displaying the error code 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 ...

Страница 37: ...with S port Yes Power off then turn on the unit 5 seconds later reconnect the power wire Is the error still displaying after several minutes No Replace the outdoor main PCB Power on Is the error extinguished Check all the wiring with indoor units Is the wiring to the indoor main PCB connected correctly Replace the indoor main PCB Yes Replace the outdoor main PCB No Check all the wiring with outdoo...

Страница 38: ...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 39: ...ro crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Supposed causes Connection mistake PCB faulty Trouble shooting Check if the connections and power supply is normal Correct the connections Turn on the unit when the power supply is good No Yes Indoor main PCB is defective Replace indoor main PCB ...

Страница 40: ...ill displaying the error code Shut off the power supply rotate the fan by hand Does it rotate properly The unit operates normally Find out the cause and have it solved For example check whether the fan is blocked or the bearing is broken Check the wires of fan motor Are all the connections good No Yes No Correct the connections No Yes Check whether the main PCB is normal through index 2 Yes Yes Ch...

Страница 41: ... less than 100V 208 240V power supply or 50V 115V power supply the PCB must have problems and need to be replaced 2 Outdoor DC Fan Motor control chip is in outdoor PCB NO 1 2 3 4 5 Color Orange Grey White Pink Black Signal Hu Hv Hw Vcc GND Color Red Blue Yellow Signal W V U 1 Release the UVW connector Measure the resistance of U V U W V W If the resistance is not equal to each other the fan motor ...

Страница 42: ...e 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 If any voltage is not positive voltage fluctuation the fan motor must has problems and need to be replaced ...

Страница 43: ... LED will display the failure Supposed causes Wiring mistake Sensor faulty PCB faulty Trouble shooting Check the connections between temperature sensor and main PCB Are the connections good Correct the connections No Yes Yes Replace indoor or outdoor main PCB Replace the sensor and check if the problem happen again Check the resistance value of the sensor via table1 p64 and table 2 p65 is it norma...

Страница 44: ...ndoor PCB faulty System problems such as leakage or blocking Trouble shooting Is there cool air blowing out from indoor air outlet Yes Yes Check if T2 sensor is well fixed Correct the installation or replace T2 sensor Does the problem remain again No Is there any leakage Especially the connection parts such as the gas valve and the liquid valve No Shut off the power supply and turn it on 5 seconds...

Страница 45: ...broken Correct the connection or replace the wires and connectors Yes No IPM continuity check Check if the IPM terminal resistance values are uniform Refer to page 64 Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good Yes No please refer to the below remark check wheth...

Страница 46: ...44 P U P V ...

Страница 47: ...45 P W P N ...

Страница 48: ...e unit with power supply and try to restart the unit when power supply gets normal No Yes No Correct the connections or replace the wires Yes Power on and when the unit is in standby check if the voltage between P and N is around DC 310V or 340V or 380V For different kinds of units the voltage differs Consult with technical engineer to get definite value Then start up the unit measure the voltage ...

Страница 49: ...outlet or the heat exchanger of indoor and outdoor units Yes No Yes Yes Turn off the power supply and turn it on 10 minutes later Check if the unit can start normally No Check if the refrigerant charge volume is normal Recharge the correct refrigerant volume Refrigerant system is blocked such as capillary or welded point of pipes Yes Check if all the connection especially the connection of OLP Ove...

Страница 50: ...ction or replace the wires and connectors Yes No IPM continuity check Check if the IPM terminal resistance values are uniform Refer to page 64 Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good Yes No please refer to the below remark check whether the resistance of the...

Страница 51: ... 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 52: ...7 243 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 38736 84 183 ...

Страница 53: ...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 1 955 4 ...

Страница 54: ...52 Appendix 3 10 11 12 13 14 15 16 17 18 19 20 21 22 48 50 52 54 56 58 60 62 64 66 68 70 72 23 24 25 26 27 28 29 30 31 32 33 34 35 74 76 78 80 82 84 86 88 90 92 94 96 98 ...

Страница 55: ...g Measure the resistance value of each winding by using the tester Position Resistance Value DA108X1C 23EZ DA108X1C 20FZ3 DA130M1C 31FZ DA150S1C 20FZ Blue Red 1 1Ω 20 68 0 71Ω 20 68 1 77Ω 20 68 0 95Ω 20 68 Blue Black Red Blue ...

Страница 56: ...MΩ P N U N U V V W W Red 4 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester Position Resistance Value RPG13B RPG15A RPG20B RPG28H RPG45B Black Red 530Ω 8 20 68 Brand Welling 75Ω 8 20 68 Brand Welling 381Ω 8 20 68 Brand Welling 183 6Ω 8 20 68 Brand Welling 112Ω 8 20 68 Brand Welling 118 5Ω 8 20 68 Brand Broad Ocean White Black 315Ω 8 20 68 Brand Welling 150Ω 8 20...

Страница 57: ...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 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 58: ... 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 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 2 78 ...

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