Pioneer YH024GHFI18RT2 Technical & Service Manual Download Page 1

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CENTRAL SPLIT AIR CONDITIONER

Technical &

Service Manual

v3.0

IMPORTANT NOTICE:

Thank you very much for purchasing this Air Conditioner. Please read this manual carefully before

installing or operating your new air conditioning system. Be sure to save this manual for future reference.

HIGH EFFICENCY

CONDENSING UNIT

- R-410A REFRIGERANT
- 208~230 V, 1 Phase, 60 Hz
- 18 SEER

Models:

YH024GHFI18RT2

• YH036GHFI18RT2
• YH060GHFI18RT2

•

Summary of Contents for YH024GHFI18RT2

Page 1: ...asing this Air Conditioner Please read this manual carefully before installing or operating your new air conditioning system Be sure to save this manual for future reference HIGH EFFICENCY CONDENSING UNIT R 410A REFRIGERANT 208 230 V 1 Phase 60 Hz 18 SEER Models YH024GHFI18RT2 YH036GHFI18RT2 YH060GHFI18RT2 ...

Page 2: ...These products are equipped with electrical parts If poured it will cause a serious electrical shock Do not open the service cover or access panel for the indoor or outdoor units without turning OFF the main power supply Do not touch or adjust safety devices inside the indoor or outdoor units If these devices are touched or readjusted it may cause a serious accident Refrigerant leakage can cause d...

Page 3: ...or put any material on the product Do not put any foreign material on the unit or inside the unit It is recommended that the room be ventilated every 3 to 4 hours The air conditioner may not work properly under the following circumstances The power transformer provides the same power or power as the air conditioner The electrical equipment is too close to the power supply of the air conditioner Wi...

Page 4: ... 2 Control board picture 26 8 3 Common wiring 33 9 Field setting 34 9 1 Outdoor unit DIP switch 34 9 2 Running parameter query 36 10 Piping work and refrigerant charge 39 10 1 MAX length allowed 39 10 2 Oil trap 39 10 3 Air tight test 40 10 4 Additional refrigerant charge 40 11 Installation tools and installation flow chart 41 11 1 Necessary tools and instrument list for installation 41 11 2 Insta...

Page 5: ... control can be realized by calculating the indoor coil temperature through the pressure valve Smaller outdoor dimension for installation ﬂexibility The side discharge outdoor unit saves roughly 36 more space than traditional air conditioners More conveniently it can be installed on wall yard or on the roof Convenient Installation The stop valve and connecting pipes are connected by welding and in...

Page 6: ...1 1 G GE EN NE ER RA AL L 1 2 Product lineup Type 24K 36K 60K Model Btu h available model 2 1 3 Nomenclature Outdoor unit YH024GHFI18RT2 YH036GHFI18RT2 YH060GHFI18RT2 ...

Page 7: ...ach voltage at the main terminal of outdoor unit Starting Voltage Higher than 85 of the Rated Voltage Operating temperature range This air conditioner is designed for the following outdoor operating temperatures Type Mode Outdoor operating temperature maximum minimum DC Inverter Split Air Conditioner Heat pump type Cooling Operation Heating Operation 198V 253V Storage condition Temperature 13 140 ...

Page 8: ...1 GENERAL Model Btu h Outdoor Unit 24K 1 6 Product appearance 36K 4 60K ...

Page 9: ...acing mm 1 4 Fins Perin 18 Coil Dimension W H D mm 970 1344 43 3 in 38 3 16 31 3 8 1 11 16 38 3 16 53 1 11 16 Fin Type Hydrophilic aluminium Hydrophilic aluminium Tube Outside Diameter and Type mm Ф 7 94 innergroove tube Number of Circuits 5 6 Outdoor Throttle Type EEV EEV Compressor T M U 2 2 D 0 5 2 F T A E l e d o M EATF400D64UMTA Type ROTARY ROTARY Brand GMCC GMCC Capacity Btu h 26085 41865 In...

Page 10: ...CIFICATIONS 6 NOTE 1 35 0 15 6 8 3 6 1 3 4 Outdoor Model YH024GHFI18RT2 YH036GHFI18RT2 YH060GHFI18RT2 4 05 70 5 0 376 0 376 0 6 Φ Φ 50 75 164 30 30 30 860 670 310 33 730 450 17 51 114 55 75 76 167 5 71 156 5 ...

Page 11: ...3 OUTLINES AND DIMENSIONS Unit in mm 3 Outlines and dimensions 24K 7 ...

Page 12: ...TLINES AND DIMENSIONS Unit in mm 6 1 8 155 2 5 8 66 4 1 8 105 37 3 8 950 40 7 8 1038 7 1 4 185 22 7 8 580 13 3 8 340 16 1 4 414 14 15 16 380 13 9 16 344 1 5 8 41 2 3 4 70 4 φ5 8 15 3 1 2 88 33 1 8 840 36K 8 ...

Page 13: ...3 OUTLINES AND DIMENSIONS Unit in mm 60K 9 ...

Page 14: ...ta is based on the same conditions as the nominal heating and cooling capacities 3 The compressor started by an inverter resulting in extremely low starting current Power supply Applicable voltage ELB Outdoor unit Voltage V PH Frequency Hz Umin V Umax V Nominal Current A Nominal Sensitive Current mA 36K 208 230 1 60 198 253 35 30 24K 208 230 1 60 198 253 25 30 60K 208 230 1 60 198 253 60 30 10 ...

Page 15: ... 5 26 1 26 3 26 4 S T 1 00 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 74 0 92 0 39 0 53 0 68 PI 1 84 1 85 1 88 1 88 1 88 1 89 1 92 1 93 1 94 1 95 1 97 1 99 2 41 2 42 2 45 105 TC 19 4 19 7 20 1 20 3 20 1 20 3 20 5 20 7 21 5 21 7 21 8 22 0 25 2 25 3 25 4 S T 0 99 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 75 0 93 0 39 0 54 0 69 PI 2 18 2 21 2 23 2 23 2 23 2 26 2 28 2 30 2 30 2 33 2 34 2 37 2...

Page 16: ...7 9 28 2 28 5 29 6 29 8 30 0 30 2 34 6 34 7 34 9 S T 0 99 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 75 0 93 0 39 0 54 0 69 PI 3 77 3 81 3 85 3 85 3 85 3 90 3 94 3 98 3 98 4 02 4 05 4 09 4 81 4 83 4 84 115 TC 23 9 24 2 24 8 25 0 24 8 25 0 25 3 25 5 26 6 26 8 26 9 27 1 28 8 29 0 29 1 S T 1 00 1 00 1 00 1 00 0 62 0 85 1 00 1 00 0 40 0 60 0 79 0 99 0 39 0 58 0 76 PI 3 84 3 88 3 92 3 92 3 92 3 98 ...

Page 17: ...6 30 9 31 2 32 3 32 6 32 9 33 1 37 9 38 0 38 2 S T 0 99 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 75 0 93 0 39 0 54 0 69 PI 3 87 3 91 3 96 3 96 3 96 4 00 4 04 4 08 4 08 4 12 4 15 4 19 4 94 4 95 4 97 115 TC 26 2 26 5 27 1 27 3 27 1 27 3 27 6 27 9 29 1 29 3 29 4 29 6 31 5 31 7 31 8 S T 1 00 1 00 1 00 1 00 0 62 0 85 1 00 1 00 0 40 0 60 0 79 0 99 0 39 0 58 0 76 PI 3 94 3 98 4 03 4 03 4 03 4 08 4 ...

Page 18: ...89 5 94 95 TC 42 1 42 6 43 5 44 1 43 5 44 1 44 5 44 9 46 6 47 0 47 3 47 7 55 4 55 9 56 2 S T 1 00 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 74 0 92 0 39 0 53 0 68 PI 5 30 5 34 5 41 5 41 5 41 5 46 5 53 5 57 5 60 5 64 5 69 5 76 6 94 6 99 7 06 105 TC 41 2 41 8 42 7 43 2 42 7 43 2 43 6 44 1 45 7 46 1 46 4 46 7 53 5 53 7 54 0 S T 0 99 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 75 0 93 0 39 0 5...

Page 19: ...94 5 99 95 TC 42 5 43 0 43 9 44 5 43 9 44 5 44 9 45 4 47 0 47 5 47 8 48 2 56 0 56 4 56 7 S T 1 00 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 74 0 92 0 39 0 53 0 68 PI 5 34 5 39 5 46 5 46 5 46 5 50 5 57 5 62 5 64 5 69 5 73 5 80 7 00 7 04 7 11 105 TC 41 6 42 2 43 1 43 6 43 1 43 6 44 0 44 5 46 1 46 6 46 9 47 2 54 0 54 2 54 5 S T 0 99 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 75 0 93 0 39 0 5...

Page 20: ... 6 09 6 14 95 TC 46 3 46 7 47 7 48 4 47 7 48 4 48 9 49 3 51 1 51 6 51 9 52 4 60 9 61 4 61 7 S T 1 00 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 74 0 92 0 39 0 53 0 68 PI 5 47 5 52 5 59 5 59 5 59 5 64 5 71 5 76 5 78 5 83 5 88 5 95 7 17 7 22 7 29 105 TC 45 3 45 9 46 9 47 4 46 9 47 4 47 9 48 4 50 2 50 6 51 0 51 3 58 8 58 9 59 2 S T 0 99 1 00 1 00 1 00 0 62 0 84 1 00 1 00 0 39 0 57 0 75 0 93 0 39 ...

Page 21: ...gth between indoor unit and outdoor unit m Cooling EL ft m Model 25 7 6 246 75 36K 60K 1 0 0 98 0 97 0 93 0 89 0 86 0 82 0 81 0 75 0 69 38 10 50 15 75 23 100 30 125 38 150 45 164 50 200 61 Heating EL ft m Model 25 7 6 246 75 36K 60K 1 0 0 98 0 97 0 93 0 89 0 86 0 83 0 81 0 76 0 70 38 10 50 15 75 23 100 30 125 38 150 45 164 50 200 61 24K 1 0 0 95 0 93 0 89 0 85 0 81 0 78 0 75 24K 1 0 0 94 0 93 0 89...

Page 22: ...ling heating If outdoor unit is higher correction should be applied to cooling capacity if outdoor unit is lower correction should be applied to heating capacity 5 3 Correction factors according to defrosting operation The heating capacity in the previous part excludes the condition of defrosting operation period In consideration of defrosting operation the heating capacity is corrected by the equ...

Page 23: ...35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 NC 70 10 20 30 40 50 60 70 80 90 63 125 4k 8k NC 60 NC 65 NC 70 60 70 80 90 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 10 20 30 40 50 63 125 250 500 1k 2k 4k 8k 3 28ft 1 0m ahead of the unit 2 7ft 0 83 high from the bottom of the unit 3 28ft 1 0m high from the ground Model 60K Test condition 3 28ft 1 0m ahead of the unit 3 28ft 1 0m high from the b...

Page 24: ...components 1 Compressor 8 2 9 3 10 4 11 5 12 6 7 Outdoor heat exchanger Coil temperature sensor One way valve Ambient temperature sensor Electronic expansion valve Stop valve Liquid Stopv valve Gas Pressure sensor Discharge temperature sensor 4 Way valve 1 2 3 4 5 6 7 8 9 10 11 12 P Strainer 20 ...

Page 25: ...ressure switch Outdoor heat exchanger Coil temperature sensor Defrost temperature sensor Ambient temperature sensor Electronic expansion valve Stop valve Liquid Stopv valve Gas Discharge temperature sensor Suction temperature sensor 4 Way valve Pressure sensor Strainer One way valve 14 15 21 ...

Page 26: ...itch Outdoor heat exchanger Coil temperature sensor Defrost temperature sensor Ambient temperature sensor Electronic expansion valve Stop valve Liquid Stopv valve Gas Discharge temperature sensor Suction temperature sensor 4 Way valve Pressure sensor Strainer One way valve 14 15 LP Low pressure switch 16 ...

Page 27: ...am Outdoor unit 24K Electric wiring diagram 2089691 B Main control board Remark Dashed parts are not available in some models For details see the table below available part Outdoor units model Four way valve Heating belt Heating YEL GRN Overheat protector 24K 23 ...

Page 28: ...8 WIRING DIAGRAM 36K Electric wiring diagram 2022241 C Main control board Driver board POWER THERMOSTAT 24 ...

Page 29: ... Electric wiring diagram 2097819 A 25 Main control board Driver board available part Outdoor units model Superheat protection switch 60K Remark Dashed parts are not available in some models For details see the table below ...

Page 30: ...Coil temperature sensor 16 AC Power Lin 5 Ambient temperature sensor 17 AC Power Nin 6 Discharge temperature sensor 18 GND 7 Overheat protector 19 Reactor L1 8 Electronic expansion valve 20 Reactor L2 9 High pressure 21 Rectifier bridge 10 SW 22 IGBT 11 Computer Checker 23 Diode 12 4 way valve 24 IPM 1 2 20 3 19 4 5 6 7 8 18 9 10 11 14 13 15 16 17 12 21 22 23 24 26 ...

Page 31: ...y board NO Description NO Description 1 Switch to outdoor control board 5 S1 Select button 2 7 Segment display 6 DIP switch 3 S3 Decrease button 7 Program 4 S2 Increase button 8 Computer Checker to outdoor control board 6 3 4 5 8 7 1 2 27 ...

Page 32: ... Electric heating belt N 15 Pressure sensor 5 N Out to driver board Nin 16 Computer socket 6 AC Power Nin 17 EE data socket 7 Earth 18 DC motor 8 AC Power Lin 19 DC310V from electrolytic capacitor 9 L Out to driver board Lin 20 Communication signal to driver board 10 Electronic expansion valve 21 Power to driver board 11 Communication signal to thermostat and indoor 1 17 18 2 16 3 15 4 5 6 14 7 8 ...

Page 33: ...eactor L2 8 DC to electrolytic capacitor 2 Reactor L1 9 Compressor U 3 AC Power Lin 10 Compressor V 4 AC Power Nin 11 Compressor W 5 EE data socket 12 GND to electrolytic capacitor 6 Power from main control board 13 DC to electrolytic capacitor 7 Communication signal from main control board 29 ...

Page 34: ...C Fan Driver2 12 EEPROM 3 IPM SI 13 PTC Control Signal 4 Defrost Coil Temperature Sensor 14 Communication signal 5 Pressure Sensor 15 Electric Heating Belt 6 Discharge Temperature Sensor 16 Electric Heating Belt 7 Ambient Temperature Sensor 17 4 Way Valve 8 High Pressure Switch 18 Base heater 9 Low Pressure Switch 19 AC Power 30 10 Electronic expansion valve ...

Page 35: ...AGRAM 1 2 3 4 5 6 7 8 9 10 11 12 13 NO Description NO Description 1 DC Fan Signal 8 Compressor W 2 IPM SI 9 Compressor U 3 EEPROM 10 Compressor V 4 Nin 11 DC FAN1 5 Lin 12 DC FAN2 6 Reactor L1 13 7 Reactor L2 DC Fan Signal 31 ...

Page 36: ...8 WIRING DIAGRAM Filter board 1 2 3 4 5 NO Description NO Description 1 N Out 4 LIN 2 PTC Control Signal 5 NIN 3 L Out 32 ...

Page 37: ... a larger wire size should be selected Install main switch and ELB for each system separately Select the high response type ELB that acts within 0 1second Max Running Current A REFER TO NAMEPLATE NOTE Model Capacity Power Supply ELB Power Source Cable Size Transmitting Cable Size Rated Current A Nominal Sensitive Current mA 24K 208 230V 60Hz 25 30 3 12AWG 4 16AWG 36K 208 230V 60Hz 35 30 3 10AWG 4 ...

Page 38: ...0K SW1 2 Setting Default Mandatory defrost mode Refrigerant collection Mandatory defrost mode Operation Dial the switch from OFF to ON before turn on the appliance and set it in heating mode then it will run with manual defrosting mode at once Refrigerant collection mode Actions The compressor runs with the target frequency and without any protection when frequency rises The EEV runs with setting ...

Page 39: ...the LED digital tube of outdoor unit count down to 0 40 39 38 0 and 0 begins to blink close the shut off valve of the gas piping with an Allen wrench in a clockwise direction Step 9 Cut off machine power and the procedure for recovering refrigerant is finished NOTE Be sure to switch back the dial after refrigerant recovery operation If not it will enter refrigerant recovery mode again after power ...

Page 40: ...re are 3 buttons on the digital display board 1 Select button Select to display outdoor indoor unit parameter P Parameter of outdoor unit 2 INCREASE button Each time it is pressed the number rises by 1 3 DECREASE button Each time it is pressed the number lowers by 1 The parameter content will be automatically displayed after the parameter code is selected for 3s S1 S2 S3 36 ...

Page 41: ...ement Outdoor DC Motor target speed AC input current AC input voltage DC bus voltage Compressor phase current Frequency limit code Target suction overheating Target exhaust overheating Actual suction overheating heating Actual exhaust overheating heating Parameters can be checked in the following table below Parameter code Descriptions P 0 P 1 P 2 P 4 P 5 P 6 P 7 P 8 P 9 P 10 P 11 P 13 P 14 P 15 P...

Page 42: ...H target value H 3 Target pressure in cooling mode Actual pressure the displayed value 100 H 4 Target pressure in heating mode Actual pressure the displayed value 100 9 FIELD SETTING H 5 Actual pressure Actual pressure the displayed value 100 36K 60K There are 3 buttons on the digital display board S1 S2 S3 1 SWITCH button Indoor parameters and outdoor parameters can be selected in turn by pressin...

Page 43: ...cooling heating performance better the refrigerant piping should be as short and straight as possible 10 2Oil trap When the indoor unit is lower than outdoor unit and height difference is larger than 5m set an oil trap every 5m height difference on suction piping NOTE Oil trap Slope 1 200 1 250 Slope 1 200 1 250 10 Piping work and refrigerant charge 10 1 MAX length allowed Pipe length L Height dif...

Page 44: ...Air tight procedure 10 4 Additional refrigerant charge Although refrigerant has been charged into this unit additional refrigerant charge is required according to the piping length The additional refrigerant precharge quantity should be determined and charged into the system according to the following procedure Record the additional refrigerant quantity in order to facilitate maintenance and servi...

Page 45: ...ding Tubes Torque Wrench For φ1 2 φ5 8 spanner size is up 2mm Connection of Flare Nut Forφ1 4 φ3 8 φ3 4 spanner size is the same Brazing Tool Perform correct brazing work Brazing for Tubes Nitrogen Gas Strict Control against Contamin Blow nitrogen during brazing Prevention from Oxi B i dation during Lubrication Oil for Flare Surface Use a synthetic oil which is equivalent to the oil used in the re...

Page 46: ... indoor unit and outdoor unit Indoor unit installation Electrical wiring Drain piping installation Duct installation Refrigerant piping installation Heat insultation Outdoor unit installation Vacuum pumping and leakage detection Additional refrigerant charge Test run NOTE This flow is only for reference for details please see installation manual section 42 ...

Page 47: ...rature is too high compressor provides automatic protection 4 Oil return Control When the compressor runs at low frequencies for a long time control system will start the oil return mechanism The oil in the system returns to the compressor 5 Operation Mode Air conditioning mode is the operation mode set by users through thermostat two modes are available cooling heating 6 Four way Valve Control Fo...

Page 48: ...09 6286 332 3441 355 3104 6 83 6 46 10 293 5903 314 9620 336 5448 6 79 6 41 9 278 4719 298 5822 318 3744 6 74 6 22 8 264 2156 283 1464 302 2294 6 69 6 31 7 250 7678 268 5936 286 5448 6 64 6 26 6 238 0783 254 8686 271 7603 6 59 6 22 5 226 1003 241 9200 257 8193 6 54 6 17 4 214 7903 229 6997 244 6593 6 49 6 11 3 204 1073 218 1630 232 2612 6 44 6 07 2 194 0135 207 2681 220 5495 6 39 6 02 1 184 4732 1...

Page 49: ... 1342 28 3306 4 44 4 22 44 24 9277 26 0755 27 2150 4 40 4 19 45 23 9697 25 0632 26 1488 4 36 4 15 46 23 0530 24 0950 25 1293 4 32 4 12 47 22 1757 23 1688 24 1545 4 29 4 08 48 21 3360 22 2826 23 2221 4 25 4 05 49 20 5321 21 4345 22 3301 4 21 4 01 50 19 7623 20 6226 21 4766 4 17 3 98 51 19 0261 19 8468 20 6612 4 14 3 94 52 18 3211 19 1040 19 8808 4 10 3 91 53 17 6458 18 3926 19 1338 4 06 3 87 54 16 ...

Page 50: ...2 53 2 47 100 3 6758 3 7700 3 8643 2 50 2 44 101 3 5661 3 6585 3 7512 2 53 2 47 102 3 4601 3 5509 3 6419 2 56 2 50 103 3 3577 3 4468 3 5362 2 59 2 53 104 3 2588 3 3463 3 4341 2 61 2 56 105 3 1632 3 2491 3 3353 2 64 2 58 106 3 0708 3 1551 3 2398 2 67 2 61 107 2 9816 3 0643 3 1475 2 70 2 64 108 2 8953 2 9765 3 0582 2 73 2 67 109 2 8118 2 8915 2 9717 2 76 2 70 110 2 7311 2 8093 2 8881 2 78 2 73 111 2...

Page 51: ...99 22 53 23 06 2 40 2 30 8 21 01 21 51 22 00 2 32 2 23 7 20 08 20 54 20 99 2 24 2 14 6 19 19 19 62 20 04 2 19 2 10 5 18 35 18 74 19 14 2 08 2 09 4 17 55 17 92 18 29 2 06 2 02 3 16 78 17 13 17 48 2 04 2 00 2 16 06 16 38 16 71 1 95 1 97 1 15 36 15 67 15 98 1 98 1 94 0 14 70 15 00 15 29 2 00 1 90 1 14 08 14 36 14 64 1 95 1 91 2 13 48 13 75 14 02 1 96 1 93 3 12 91 13 17 13 43 1 97 1 94 4 12 36 12 62 1...

Page 52: ...47 2 389 2 525 2 669 5 39 5 40 48 2 309 2 443 2 583 5 49 5 42 49 2 232 2 363 2 500 5 54 5 48 50 2 158 2 286 2 421 5 60 5 58 51 2 087 2 212 2 344 5 65 5 63 52 2 018 2 140 2 269 5 70 5 69 53 1 952 2 072 2 198 5 79 5 73 54 1 888 2 005 2 129 5 84 5 82 55 1 827 1 941 2 062 5 87 5 87 56 1 767 1 880 1 998 6 01 5 91 57 1 710 1 820 1 936 6 04 5 99 58 1 655 1 763 1 876 6 13 6 02 59 1 602 1 707 1 818 6 15 6 ...

Page 53: ... 6179 8 21 8 16 97 0 5064 0 5519 0 6014 8 24 8 23 98 0 4923 0 5369 0 5853 8 31 8 27 99 0 4787 0 5224 0 5698 8 37 8 32 100 0 4655 0 5083 0 5547 8 42 8 36 101 0 4528 0 4946 0 5401 8 45 8 42 102 0 4404 0 4814 0 5259 8 52 8 46 103 0 4284 0 4685 0 5121 8 56 8 51 104 0 4168 0 4561 0 4988 8 62 8 56 105 0 4056 0 4440 0 4859 8 65 8 62 106 0 3947 0 4323 0 4733 8 70 8 66 107 0 3841 0 4210 0 4611 8 76 8 70 10...

Page 54: ...he outdoor heat exchanger is dirty such as condenser There are heating devices indoors The air tightness is not enough and people come in and out too frequently 4 Block of outdoor heat exchanger 5 Improper setting of temperature 1 Clean the heat exchanger of the outdoor unit such as condenser 2 Remove heating devices 3 Keep certain air tightness indoors 4 Remove block obstacles 5 Check and try to ...

Page 55: ...l fault code When LED3 is on LED1 and LED 2 indicate drive control fault code When LED3 is flickering and LED1 LED 2 are all off it indicates the compressor is preheating Failures display with 5s interval It means LED will be off for 5s to report the next fault code System protection codes display method is the same with main control fault code LED lamps will be off when there is no failure protec...

Page 56: ... displayed by 7 segment display on main control board Show failure occur Display ERROR code LED1 Drive failure indicator Drive fault code display The lamp of drive board flashing shows failure occurs How many times the drive failure lamp flick will show the failure code 52 ...

Page 57: ...oard components 3 Reassemble the EE components 5 Cooling freezing protection the indoor coil temperature is too low or heating overload indoor coil temperature is too high 1 2 The indoor unit can not blow air normally The room temperature is too low in cooling mode or the room temperature is too high in heating 3 The filter is dirty 4 The duct resistance is too high to result in low air flow 5 The...

Page 58: ...ce the low pressure switch 3 Check the welding point to confirm whether the unit leaks and add some refrigerant 4 Replace the expansion valve 5 Replace the outdoor control board Applied to models with low pressure switch or pressure sensor 16 Overload protection in cooling mode System overload Please refer to NOTE 3 17 Discharge temperature sensor fault 1 The wiring of the discharge tempe rature s...

Page 59: ... unit turn off due to the IPM board over heating fault 1 The outdoor ambient temp is too high 2 The speed of the out fan motor is too low if the fan motor is AC fan motor 3 The outdoor unit is not installed in accordance with the standard 4 The supply power is too low 1 Normal protection 2 Check the fan capacitor and replace the fan capacitor if it is a failure 3 Reinstalled the outdoor unit refer...

Page 60: ...h as condenser 5 The speed of the outdoor fan motor is too low Check the outdoor fan motor and fan capacitor 6 The outdoor fan is broken or the outdoor fan is blocked Check the outdoor fan 7 The air inlet and outlet has been blocked Remove the obstructions 8 The expansion valve or the capillary fails Replace the expansion valve or the capillary NOTE 4 Over load in heating mode Overload in heating ...

Page 61: ...AD offset abnormal detected failure Driver board fails Change the driver board 16 Inverter PWM logic set fault 17 Inverter PWM initialization failure 18 PFC_PWM logic set fault 19 PFC_PWM initialization fault 20 Temperature abnormal 21 Shunt resistance unbalance adjustment fault 22 Communication failure 1 Communication wire connection is not proper 2 Driver board fails 3 Control board fails 1 Chec...

Page 62: ...ge overload voltage 1 Supply voltage input is too high 2 Driver board fault 1 Check power supply 2 Change the driver board 9 AC voltage imbalance Driver board fails Change the driver board 10 The PFC current detection circuit fault before compressor is ON Bad driver board components Change the driver board 11 AC voltage supply in outrange 1 Power supply abnormal power frequency out of range 2 Driv...

Page 63: ...18 Driver board read EE data error 1 EEPROM has no data or data error 2 EEPROM circuit fault 1 Change EEPROM component 2 Change the driver board 19 PFC chip receives data fault Abnormal communication loop Change the drive board 20 PFC soft start abnormally Abnormal PFC drive loop Change the drive board 21 The compressor drive chip could not receive data from PFC chip Communication loop fault Chang...

Page 64: ... between the temperature of tubes Test Test pressure 15 Checking components 15 1 Check refrigerant system TEST SYSTEM FLOW Conditions Compressor is running The air condition should be installed in good ventilation Tool Pressure Gauge Technique see feel test 60 ...

Page 65: ...the pressure is close to static pressure NO NO 4 way valve collude or compressor exhaust very ebb yes NO yes Heating mode Test system pressure Is the high pressure normal at service part The pressure on the high side The pressure on the low side Recharge refrigerant after air purging with the vacuum pump Is the high pressure normal over again Air remains at the refrigerant system yes The system wa...

Page 66: ...ATF250D22UMT 60K EATF400D64UMTA DC Inverter Controller Thermal Sensor Compressor Power Test in resistance TOOL Multi meter Test the resistance of the winding The compressor fails if the resistance of winding is 0 short circuit or open circuit Familiar error 1 Compressor motor lock 2 Discharge pressure value approaches static pressure value 3 Compressor motor winding abnormality 62 ...

Page 67: ...trical wire incorrectly 4 Warning In case AC voltage is impressed to compressor the compressor performance will decrease because of its rotor magnetic force decreasing 3 Inductance Familiar error 1 Sound abnormality 2 Insulation resistance disqualification Remove the PCB ASS Y from the electrical component box Then pull out the fuse from the PCB ASS Y Check for continuity by a multimeter as shown ...

Page 68: ...ge free Step Illustration Handling Instruction 1 Remove external casing 1 Remove the top cover handle and valve cover 2 Remove the outer case and right side plate 2 Remove motor 1 Remove the blade nut and then remove the blade 2 Remove the motor from motor supporter 3 Remove compressor 1 Reclaim the refrigerant from the entire system 2 Unsolder the 4 way valve piping assy from compressor 3 Remove ...

Page 69: ... the top cover handle and valve cover 2 Remove the outer case and right side plate 2 Remove motor 1 Remove the blade nut and then remove the blade 2 Remove the motor from motor supporter 3 Remove compressor 1 Reclaim the refrigerant from the entire system 2 Unsolder the 4 way valve piping assy from compressor 3 Remove the compressor mounting bolts 4 Carefully remove the compressor from chassis 4 A...

Page 70: ...plate 2 Remove motor 1 Remove the blade nut and then remove the blade 2 Remove the motor from motor supporter 3 Remove gas liquid separator 1 Reclaim the refrigerant from the entire system 2 Unsolder the 4 way valve piping assy from gas liquid separator 3 Remove the gas liquid separator 4 Remove compressor 1 Reclaim the refrigerant from the entire system 2 Unsolder the 4 way valve piping assy from...

Page 71: ...l and low level 4 way valve signal are received from the thermostat that is Y C is high level and B C is low level 2 Stopping operating Stopping conditions When low level compressor signal is received from the thermostat that is Y C is low level Actions The compressor keeps operating with its current frequency and detects its system pressure at the same time a If the pressure changes more than 0 0...

Page 72: ...e downer fan speed is lower than the upper fan speed for 30rpm 60rpm 17 3 Heating Mode 1 Start conditions When high level compressor signal and high level 4 way valve signal are received from the thermostat that is both Y C and and B C are low level 2 Stopping operating in heating mode Stopping conditions When low level compressor signal and low level 4 way valve signal are received from the therm...

Page 73: ...pressure is reached the compressor frequency will keep stable Outdoor fan running rules Once the outdoor fan starts up it will follow the rules below Single outdoor fan First it will run in an invariable speed for a short time Then it will regulate the speed by the saturation temperature which is got from high pressure cycling Double outdoor fan If it has two outdoor fans the upper fan regulates t...

Page 74: ...il temp T3 keeps higher than T2 for 10 seconds the compressor and outdoor fan will shut off When T3 is lower than T1 the compressor and outdoor fan will restart up Condition2 Heating mode When the saturation temperature which is got from high pressure cycling T3 keeps higher than T2 for 10 seconds the compressor and outdoor fan will shut off When T3 is lower than T1 the compressor and outdoor fan ...

Page 75: ......

Page 76: ...Product improvement specifications and appearance in this manual are subject to change without prior notice ...

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